摘要
受地形条件限制,山区高速公路省界站场通常利用路线两侧的斜坡台地或阶地展布,以减少大规模的高填深挖。但因省界站场规模庞大,场平过程不可避免要采取填筑,稍有不慎,即会诱发滑坡灾害,尤其是大型堆积或崩坡积形成的台地或阶地。滑坡的处治不仅费用巨大,还会影响到项目的总体进度,甚至关乎到高速公路的如期通车。针对近年来山区高速公路省界站场滑坡事故多发的现状,本文在大型站场滑坡灾害处治实践中总结出了一套简单有效、安全可靠的滑坡灾害处治方法,即单排抗滑桩联合地表截排水和地下引排水;其关键技术是如何确定抗滑桩最优支挡位置,使得桩前滑体剩余下滑力由抗滑桩承受后,桩后滑体在最不利工况下自身能恰好稳定,克服双排或多排桩造成的处治费用过高,施工风险大、周期长等不利因素。该方法经已通车高速公路主线站场滑坡灾害治理的验证,效果显著,具有成熟的理论基础和可靠的实践支撑,可为类似工程提供借鉴和参考。
Limited by the terrain conditions,the mountainous highway provincial boundary station usually uses slope platforms or terraces on each side of the route to reduce large-scale high-fill or deep excavation. However,due to the large scale of the provincial boundary station,it is inevitable that the filling during the flat process of the steep slope terrace. A slight carelessness will induce landslide disasters,especially the platforms or terraces formed by large-scale accumulation or collapse of slopes. The treatment of landslides is not only costly,but also affects the overall progress of the project and even affects the opening of the expressway as scheduled. In view of the frequent occurrence of landslide accidents in the provincial boundary stations of mountainous expressways in recent years,this paper has summarized a simple,effective,safe and reliable method for landslide disaster management based on specific projects,which a single row of anti-slide piles combined with surface interception drainage and underground drainage.The key technique of this method is how to determine the optimal support position of the anti-slide pile,which makes the remaining sliding force of the front slide of the pile is supported by the anti-slide pile,the post slide body of the pile is stable in the most unfavorable condition,overcomed the high cost of treatment caused by the double row or multi row pile,the large construction risk and the unfavorable factors such as the project as scheduled. This method has been verified by the control of the landslide disaster in the main line of the motorway. It has a mature theoretical basis and reliable practical support,which can provide a reference for the similar projects.
作者
冯玉涛
FENG Yutao(Chortgqbtg Communications Planning Survey ＆ Design Institute,Chongqing 401121,China)
出处
《灾害学》
CSCD
北大核心
2018年第A01期100-104,109,共6页
Journal of Catastrophology
关键词
山区公路
主线站场
大型堆积体
滑坡
综合处治
mountain roads
main line station
large accumulations
landslide
comprehensive treatment
