管线渗漏诱发基坑工程事故的数值模拟研究  

Numerical Modeling on Engineering Accidents Caused by Pipeline Leaking

作　　者：程建华[1] 王辉[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454003

出　　处：《煤炭工程》2014年第11期122-125,共4页Coal Engineering

基　　金：国家自然科学基金资助项目"裂隙岩质边坡可靠性分析与失稳机理研究"(41072224)

摘　　要：在分析管线渗漏诱发的一具体基坑工程事故原因的基础上,结合ABAQUS有限元软件建立了三维数值模型,得出了管线渗漏导致基坑坍塌的内在原因,并将问题拓展,得出了不同渗漏位置对土钉轴力、坑壁位移及安全系数的影响规律。研究结果表明,在假定入渗深度与宽度保持不变的条件下,随着入渗位置逐渐远离开挖面,坑壁位移先增大后减小,存在突变点;相应地安全系数先减小后增大,在土钉末端入渗时,达到最小值。研究成果为分析管线渗漏导致基坑安全事故的原因提供了理论基础。A 3D numerical model was established with ABAQUS,according to the analysis of an engineering accident caused by pipeline leaking. The intrinsic reasons of the pipeline leaking was analyzed,an further studied,obtaining the influence law of infiltration location on axial force of soil nails,horizontal displacement and safety factor. The results show that,on the premises of constant depth and width, as the infiltration position gradually recedes from the excavation surface,horizontal displacements first increases then decreases at a mutation point; safety factor first decreases then increases,achieving the minimum when the infiltration position is near the end of soil nail. The results can provide theory foundations for analyzing reasons of pipeline leaking leading to foundation pit engineering accidents.

关 键 词：工程事故 土钉支护 管线渗漏 土钉轴力 安全系数 坑壁位移 

分 类 号：TU476.4[建筑科学—结构工程]