Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/init.php on line 48 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/init.php on line 48 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 143 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 147 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 148 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 28 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 30 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 39 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 40 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 41 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 42 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 44 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 49 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 49 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 50 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 50 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 213 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 46 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 110 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 182 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/engine.php on line 146 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 101 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 229 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 229 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 233 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 233 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 374 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/rssinform.php on line 97 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/rssinform.php on line 97 Деформации земляного полотна и борьба с ними » Станция Белгород расписание поездов. Железнодорожный транспорт


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Станция Белгород - Расписание поездов » Железные дороги » Железнодорожный путь и путевое хозяйство » Деформации земляного полотна и борьба с ними
 
 
Деформации земляного полотна и борьба с ними
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При тщательном соблюдении правил сооружения и эксплуатации стабильность земляного полотна, как правило, обеспечивается. При несоблюдении же этих правил, а также при нарушении устойчивости земной поверхности или стихийных явлениях происходят изменения формы, или так называемые деформации земляного полотна. Разли­чают деформации и повреждения основной площадки земляного по­лотна, повреждения откосов, повреждения и разрушения тела и ос­нования земляного полотна, в том числе при слабом основании или неблагоприятном воздействии природных факторов.
Деформации и повреждения основной площадки земляного полотна бывают в виде углублений на основной площадке и пучин. Углубления на основной площадке обра­зуются из-за вдавливания балластного слоя в земляное полотно.
При недостаточной толщине балластного слоя или несущей способ­ности грунта основной площадки образуются углубления под шпа­лами, называемые балластными корытами (рис. 27, а). Если не принять своевременных мер, то балластные корыта увеличи­ваются, образуя балластные ложа (рис 27, б), мешки (рис 27, в) и   гнезда   (рис 27, г).
 
Деформации основной площадки земляного полотна

Рис. 27. Деформации основной площадки земляного полотна:
а-балластные корыта; б - ложа; в, г-мешки, карманы, гнезда
 
Для предупреждения деформаций основной площадки насыпи от­сыпают однородными грунтами с высокой несущей способностью, тща­тельно уплотняют их, не допускают попадания в тело земляного по­лотна воды, обеспечивают достаточную толщину балластного слоя до открытия движения поездов. Оздоровлять земляное полотно при наличии балластных корыт можно путем их вырезки или осушения сплошной боковой срезкой.
Пучинами называются поднятия грунта вследствие замерза­ния задерживающейся в нем или поступающей из нижних более теп­лых слоев воды. Пучины, возникающие в углублениях основной пло­щадки земляного полотна или загрязненном балласте, называются поверхностными (верховыми), а образующиеся под основной площад­кой — коренными (грунтовыми).
 
Поперечный разрез противо-пучинной шлаковой подушки
 
Рис 28. Поперечный разрез противо-пучинной шлаковой подушки:
1 — шлакогруитобетон; 2 — щебень; 3 — шлак
 
Рис. 29. Уменьшение крутизны (а) и террасирование (б) откосов выемки
 
Поверхностные пучины можно предупреждать заменой загрязнен­ного балласта, осушением балластных корыт и лож путем устройства прорезей. Коренные пучины ликвидируют понижением уровня грун­товых вод ниже глубины промерзания, устройством подкюветных дре­нажей, мелиорацией грунтов, а также отеплением земляного полотна укладкой противопучинных шлаковых или асбестовых подушек (рис 28). На отдельных участках БАМа намечается укладка утепля­ющего слоя из пенопласта.
Повреждение откосов бывает в виде смывов грунта атмосферными водами, сплывов, т. е. местных смещений части грунта откоса при сохранении общей его устойчивости, оползаний, при ко­торых происходит отслоение откосной части с захватом основной пло­щадки. В скальных выемках бывают, кроме того, вывалы отдельных камней или обвалы массы скального грунта. Причинами таких де­формаций являются недостаточное или поврежденное укрепление от­косов, завышение их крутизны, недостаточная плотность грунтов на­сыпи. Смывы и сплывы устраняются планировкой откосов и допол­нительным их укреплением, а оползания — уполаживанием откосов или сооружением контрфорсов или контрбанкетов.
Повреждения и разрушения тела и осно­вания земляного полотна бывают в виде оползней, сдвигов (спол­заний) насыпей по наклонному основанию, расползания и оседания насыпей при стабильном основании. Причинами оползней являют­ся переувлажнение грунтов сверх допустимого предела, а также неоднородности грунтов и неблагоприятная геологическая структура склона, а причиной сдвига — недостаточная подготовка косогорного основания насыпи и отсутствие защиты от переувлажнения. Для пре­дупреждения этих видов деформаций производится осушение земля­ного полотна и прилегающих откосов с помощью дренажей, а также сооружаются подпорные стены и контрбанкеты.
Расползанию в большинстве случаев подвержены новые насыпи, сооружаемые из недоброкачественных и мелкозернистых пылеватых грунтов с большой влагоемкостью или из мокрых и мерзлых грунтов, насыщенных водой. Предотвращение таких деформаций можно до­стичь тщательным контролем за качеством грунтов при отсыпке на­сыпей. Оседание насыпей при стабильном основании происходит так­же при нарушении технических условий из-за недостаточного уплот­нения грунта, попадания в тело насыпи снега и льда, развития повреж­дений основной площадки.
Повреждения и разрушения земляного полотна вследствие слабости основания бы­вают в виде провалов, оседания целой насыпи, выпирания грунта у подошвы насыпи или основной площадки в выемках. Провалы могут иметь место при сооружении земляного полотна на карстовых породах; для предупреждения их выполняется тщательная геологическая раз­ведка. Последствия оседаний ликвидируются подъемкой пути на балласт. Выпирание грунта основания у подошвы насыпи ликвиди­руется сооружением пригружающих контрбанкетов, а выпирание ос­новной площадки в выемках — уменьшением крутизны откосов или их террасированием (рис 29).


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