深厚软土地基多支点基坑支护稳定验算模式的探讨  

DISSCUSSION ON STABILITY CHECKING MODEL OF EXCAVATION SUPPORT WITH MULTI FULCRUM IN DEEP SOFT SOILS

作　　者：李志伟 俞伟 刘鹭 罗贞海 郭朝旭 LI Zhi–wei;YU Wei;LIU Lu;LUO Zhen–hai;GUO Chao–xu(Fujian Academy of Building Research Co.,Ltd.,350108,Fuzhou,China;Fujian Provincial Key Laboratory of Green Building Technology,350108,Fuzhou,China)

机构地区：[1]福建省建筑科学研究院有限责任公司,福州350108 [2]福建省绿色建筑技术重点实验室,福州350108

出　　处：《建筑技术》2023年第3期281-284,共4页Architecture Technology

基　　金：福建省自然科学基金项目(2019J05129);福建省科技计划项目(2014Y0016);福建省建设科技研究开发项目(2012K15)。

摘　　要：基坑稳定性验算是深厚软土基坑支护设计的一项重要内容。通过对福建软土深基坑工程案例的分析,验证了整体稳定验算作为基坑稳定主控方式是较为合理的;墙底抗隆起稳定安全系数的大小主要取决于桩端底面以下土体的承载力,而不考虑桩底以上土体对抗隆起稳定的贡献,具有一定的局限性;圆弧滑动抗隆起稳定验算模式在福建软土地区的适用性有待进一步研究。Stability calculations are an important element in the design of foundation support for deep soft soils.Based on the case study of deep foundation pit in soft soil in Fujian province,it is proved that the overall stability checking calculation is reasonable as the main control method of foundation pit stability.The safety factor of anti-heave stability of the wall bottom mainly depends on the bearing capacity of the soil below the bottom of the pile tip,and the contribution of the soil above the pile bottom to anti-heave stability is not considered,which has certain limitations.The applicability of the circular arc sliding anti-heave stability checking model in soft soil area of Fujian province needs to be further studied.

关 键 词：多支点基坑支护 稳定验算 深厚软土地基 

分 类 号：TU463[建筑科学—结构工程]