黄土填方场地管沟变形破坏机理研究  

Study on deformation and failure mechanism of pipe trench in loess filling site

作　　者：李阳[1] 刘魁[1] 杨博文 姚淼 Li Yang;Liu Kui;Yang Bowen;Yao Miao(Information Industry Engineering Investigation and Research Institute,Xi'an 710054,China)

机构地区：[1]信息产业部电子综合勘察研究院,陕西西安710054

出　　处：《山西建筑》2022年第15期81-86,共6页Shanxi Architecture

基　　金：陕西省重点研发计划项目(2022SF-338);黄土地区挖填结合区桩基础桩-土作用规律研究(2021-DKY-N01)。

摘　　要：根据黄土高填方变形区线性管沟破坏问题,采用工程地质调查、钻探、取样分析以及室内数值模拟等方法对某典型黄土填方变形场地进行了研究,揭示了填方场地的变形规律,并将第一、第二强度理论作为填方区管沟破坏的判据,分析并总结出管沟的破坏机理。从填方场地稳定性与结构变形两个方面对管沟渗漏的原因进行解释,同时分析了管道渗漏引起的次生灾害,得出管道渗漏对填筑体溶蚀会加大填筑体及其附属结构物变形,为类似填土区管道变形研究提供了参考依据。Based on failure problems of linear pipe trench in loess high embankment deformation zone,researches are made on a typical loess embankment deformation field in this paper by means of on-site engineering geology investigation,misering,sampling analysis test and indoor numerical simulation,and the deformation laws of embankment field is uncovered. This paper takes the first and second strength theory as criterion for pipe trench damage in embankment field. It analyzes and summarizes the failure mechanism of pipe trench and explains the reasons for pipe trench’s leakage from two aspects: the stability of embankment field and structural deformation,and analyzes the secondary disaster caused by pipeline leakage as well. It shows that the pipeline leakage will corrode fillings and deteriorate the deformation of fillings and their structures attached,which provides reference data for pipe deformation study on similar landfill.

关 键 词：黄土填方 管沟 变形破坏 数值模拟 

分 类 号：TU441.35[建筑科学—岩土工程]