某黄土多级贴坡高填方稳定性分析与综合治理  

Stability Analysis and Comprehensive Treatment Measures of a Loess Multi-level High Fill Slope

作　　者：丁保艳 杨校辉[3] 陈昆全 DING Baoyan;YANG Xiaohui;CHEN Kunquan(The Third Geological and Mineral Exploration Institute of Gansu Geological and Mineral Exploration and Development Bureau,Lanzhou,Gansu 730050,China;Gansu Geological Disaster Prevention Engineering Exploration and Design Institute,Lanzhou,Gansu 730050,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China)

机构地区：[1]甘肃省地质矿产勘查开发局第三地质矿产勘查院,甘肃兰州730050 [2]甘肃地质灾害防治工程勘查设计院,甘肃兰州730050 [3]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《水利与建筑工程学报》2022年第5期117-122,共6页Journal of Water Resources and Architectural Engineering

基　　金：甘肃省青年科技基金计划(20JR5RA434);甘肃省建设科技攻关计划项目(JK2021-46,JK2021-55)。

摘　　要：为研究多级贴坡高填方的稳定性及其综合治理措施,以西北地区某黄土多级贴坡高填方为例,通过理论分析其稳定性,然后提出综合治理措施,再由数值模拟验证其治理后的可靠性。结果表明:原始斜坡在自重工况下的稳定性系数为1.035,处于欠稳定状态,亟待进行治理;在对该表层土体风化严重的冲沟斜坡进行综合治理时,需要将强风化的原始坡面堆积物挖除,设置24级阶梯状交界面,施用加筋土进行八级贴坡填方,并设置锚索及抗滑桩来提高其稳定性;通过数值模拟分析综合治理措施的可靠性,表明贴坡分级支护后斜坡位移得到有效控制,坡面水平侧移控制在5.6 mm以内,最大沉降控制在5.8 mm以内,边坡趋于稳定。研究可为多级贴坡高填方的稳定性分析及其综合治理设计提供参考。In order to analyze the stability of multi-level high fill slope and its comprehensive treatment measures,a loess multi-level high fill slope in Northwest China was taken as an example,the stability is analyzed theoretically,then the comprehensive treatment measures are proposed,and finally the reliability after treatment is verified by numerical simulation.The results are as follows.According to the theoretical analysis results of the original slope stability,the stability coefficient of the slope under the gravity condition is 0.94,which is in an unstable state and needs to be treated urgently.Since the slope is a gully and the top of the slope is an important historical protection building,during the comprehensive treatment process,it is necessary to excavate the strongly weathered original slope deposit,set up a 24-level stepped interface,and then carry out eight-level slope filling with reinforced soil to restore the collapsed road and square foundation at the top and effectively support it,at the same time anchor bolts and anti-slide piles should be set to improve its stability.Through the numerical simulation analysis of the reliability of the comprehensive treatment measures,it can be seen that the slope displacement is effectively controlled after the graded support of the slope,the horizontal lateral displacement of the slope is controlled within 5.6 mm,and the maximum horizontal displacement is well controlled compared with that before reinforcement.The vertical settlement is the largest at the top of the slope,which is controlled within 5.8 mm after reinforcement,and the slope tends to be stable.

关 键 词：多级边坡 贴坡高填方 稳定性分析 综合治理 

分 类 号：TU43[建筑科学—岩土工程]