围护桩嵌固深度与基坑稳定性研究  

Study on the relationship between embedded depth of retaining pile and stability of foundation pit

作　　者：张军贤 张军华 甘坚强[1] 胡忠经 白云 王清标[3] ZHANG Junxian;ZHANG Junhua;GAN Jianqiang;HU Zhongjing;BAI Yun;WANG Qingbiao(Architecture and Civil Engineering Institute,Taizhou Vocational&Technical College,Taizhou 318000,Zhejiang,China;Taizhou Technician College,Taizhou 318000,Zhejiang,China;National Engineering Laboratory for Coalmine Backfilling Mining-Provincial Key Laboratory of Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;Shandong Zhengyuan Geological Resources Exploration Co.,Ltd.,Jinan 250000,Shandong,China)

机构地区：[1]台州职业技术学院建筑工程学院,浙江台州318000 [2]台州技师学院(筹),浙江台州318000 [3]山东科技大学煤矿充填开采国家工程实验室-矿山灾害预防控制重点实验室,山东青岛266590 [4]山东正元地质资源勘查有限责任公司,山东济南250000

出　　处：《矿产与地质》2021年第4期805-810,共6页Mineral Resources and Geology

基　　金：国家自然科学基金项目“高陡边坡预应力锚索预应力损失机理及其试验研究”(41372289);台州市科技计划项目“深基坑围护桩嵌固深度及其优化研究”(2003gy35);台州职业技术学院青年课题共同资助。

摘　　要：因深基坑围护结构失稳造成的工程事故数见不鲜,而地层差异性是导致基坑围护失稳的主要原因之一。采用数值模拟和工程监测的方法讨论了黏土夹碎石层围护桩嵌固深度问题。分析计算结果得到:在黏土夹碎石层,基坑整体稳定性、坑底抗隆起、墙底抗隆起、抗倾覆稳定性系数以及最大沉降量随着围护桩嵌固深度的增加呈非线性增大的趋势,对比分析现场监测结果与数值模拟计算结果可知,围护桩桩顶水平位移和深层水平位移监测值与数值模拟计算值拟合较好,可为相关工程提供理论支持和技术支撑。There are many engineering accidents caused by the instability of retaining structure of deep foundation pit,and the stratum difference is one of the main reasons for the instability of retaining structure of deep foundation pit.Based on numerical simulation and engineering monitoring,the embedded depth of retaining pile in the clay and gravel layer is discussed.The result shows that in the clay and gravel layer,the overall stability of the foundation pit,the uplift resistance at the pit bottom,the uplift resistance at the wall bottom,the anti overturning stability coefficient and the maximum settlement increase nonlinearly with the increase of the embedded depth of the retaining pile.By comparing the field monitoring results with the numerical simulation results,it can be seen that the monitoring values of the top horizontal displacement and the deep horizontal displacement of the retaining pile fit well with the numerical simulation values.It can provide the theoretical and technical support for the related engineering projects.

关 键 词：深基坑 围护桩 嵌固深度 稳定性 

分 类 号：TU473[建筑科学—结构工程]