重力坝杂填土地基坝基稳定复核分析  

Stability analysis of gravity dam with miscellaneous foundation

作　　者：崔竞元 杨杰[1] 程琳[1] 任杰[1] CUI Jingyuan;YANG Jie;CHENG Lin;REN Jie(School of Water Resources and Hydroelectric Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学水利水电学院

出　　处：《西安理工大学学报》2019年第4期459-466,共8页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51809212);陕西省自然科学基础研究计划重点资助项目(2018JZ5010);陕西省水利科技计划资助项目(2018SLKJ-5)

摘　　要：作为一种来源广泛经济的材料,建筑垃圾杂填土尝试被用于地基置换处理,以解决软基存在的地基承载力不足问题,但建筑垃圾杂填土同样具有变形大、空间分布不均匀、强度易受压实度影响等特点。通过复核建筑垃圾杂填土置换前后坝基的渗流稳定性、整体抗滑稳定性和坝基沉降等内容,研究建筑垃圾杂填土作为小型重力坝地基置换材料的可行性。同时,为考虑由计算参数选取引起的误差,对不同参数下的重力坝复核结果进行敏感性分析。通过分析数值模拟结果得出:在渗流控制方面,需在建筑垃圾杂填土地基底部和坝趾处设置反滤措施;在大坝稳定复核方面,通过控制材料大颗粒占比、碾压质量可以提高地基承载力,满足坝基稳定的要求;对于沉降量,建筑垃圾杂填土有一定的减轻作用,但对于深厚软基的处理需结合其他措施。As a material with a wide range of economic resources,construction waste mixed with land is tried to be used for foundation replacement treatment to solve the problem of the insufficient foundation bearing capacity of the soft foundation,but the construction waste mixed fill also has large deformation and uneven spatial distribution.The strength is susceptible to the influence of compaction.To study the feasibility of construction waste mixed fill as a small gravity dam foundation treatment replacement material,the seepage stability,overall stability and foundation settlement of the foundation before and after replacement are reviewed.Considering the error of the selected parameters,the parameters are reviewed,with an impact on sensitivity analysis.Through the analysis of the results of numerical simulation,it is concluded that in the seepage analysis,the backfilling of the foundation of the dam toe should be set to reduce the size of the bottom of the dam toe slope.In the stable review,the control of the large particle proportion and the rolling quality of the material is controlled,which can meet the requirements for the foundation bearing capacity and dam foundation stability;it has a certain reduction effect on the settlement amount,but needs to be combined with other measures for deep soft foundation.

关 键 词：杂填土地基 重力坝 坝基稳定 渗流坡降 等效塑性应变 

分 类 号：TV223[水利工程—水工结构工程] TV642.3