摘要
以永德至耿马高速公路K41+000~K41+300段滑坡为工程背景,先开展其致灾机理分析,再进行滑坡稳定性评价及治理方案筛选,旨在为其安全施工提供理论支持。经分析,该滑坡的致灾成因相对较多,内部成因是其致灾的固有属性,外部成因是其致灾的诱发因素。在稳定性评价结果中,HP02滑坡加载前稳定系数范围为0.758~1.151,属不稳定-基本稳定状态;加载后,稳定系数均小于1,属不稳定状态。HP21滑坡加载前的稳定系数范围为0.763~1.099,状态属不稳定-基本稳定;加载后,稳定系数范围为0.721~1.039,状态属不稳定-欠稳定。最后,经过方案比选,方案一在可行性、经济投资等指标上均具明显优势,故决定采用“新桩+老桩”的治理方案。
Taking the landslide of K41+000~K41+300 section of Yongde-Gengma expressway as the engineering background,the disaster mechanism analysis was carried out first,and then the landslide stability evaluation and treatment scheme screening were carried out,aiming to provide theoretical support for its safe construction.According to the analysis,there are many causes of landslide disasters.The internal causes are its inherent attributes and the external causes are its inducing factors.In terms of the stability evaluation results,the stability coefficient of HP02 landslide before loading ranges from 0.758 to 1.151,which is unstable to basically stable;After loading,the stability coefficient is less than 1,which is unstable.The stability coefficient of HP21 landslide before loading is 0.763~1.099,and the state is unstable-basically stable;After loading,the stability coefficient ranges from 0.721 to 1.039,and the state is unstable-unstable.Finally,after comparison and selection of schemes,Scheme I is adopted as the treatment scheme of“new pile+old pile”for its obvious advantages of feasibility,economic investment and other indicators.
作者
隆然
刘兴东
LONG Ran;LIU Xingdong(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)
出处
《铁道勘察》
2023年第2期33-37,共5页
Railway Investigation and Surveying
基金
国家自然科学基金项目(51709171)。
关键词
公路
滑坡
致灾机理
稳定性评价
治理方案
highway
landslide
disaster mechanism
stability evaluation
treatment plan
