摘要
国道316线天水稍子坡段(K2556 K2562)滑坡十分发育,是甘肃境内滑坡灾害最为严重的路段之一。特别是雨季或丰水年,滑坡活动频繁,对公路安全运营造成很大危害和威胁。1999年及2000年雨季该路段发生滑坡灾害15处,正在改建的公路路基30%被破坏,增加工程投资2000多万元,并拖延了工期。本区滑坡多为老滑坡的复活,具有发育密集、复活性强等特点。特殊的地质构造及易滑地层广泛分布,老滑坡的发育和独特的水文地质条件是该滑坡成群发育的地质基础。大量降水入渗,不合理的人为开挖和填方活动是滑坡的主要诱发因素。
There are many landslides in the section of Shaozipo located between 2556 to 2562 kilometers of the No.316 national highway.This section is one of the most hazardous section of the highway in Gansu province.The activity of the landslides is very serious and frequent,especially in the period of rainfall and the year with plenty of rain.Hazards of landslide imperiled the transportation safety of highway directly.Fifteen hazardous landslides occurred in this area among the season of rainfall between the year of 1999 and 2000.About 30% of the constructing roadbed was destroyed by the landslides.Cost more than 20 million RMB yuan of extra investment,and the building phase of the national highway was prolonged a lot.Ancient landslide reviving is the main kind in this section of highway.It scattered in Shaozipo very densely and the reactivation of the landslides is very violently.Special geological structures,easy sliding layer depositing,ancient landslide developing and spcial hydrogeology conditions are the geological bases of the landslides in Shaozipo,and heavy rainfall,water of the earth surface permeating and the unreasonable human activities of excavationg and filling soil are the main triggering factors of landslide hazard.
出处
《中国地质灾害与防治学报》
CSCD
2003年第2期19-23,共5页
The Chinese Journal of Geological Hazard and Control
基金
甘肃省自然科学基金重点资助项目(ZS021 A25 012 Z)
