超深地下连续墙水平承载力试验研究  

Test and Research on Horizontal Bearing Capacity of Ultra-Deep Diaphragm Wall

作　　者：戴国亮[1] 周香琴[1] 龚维明[1] 薛国亚[1] 

机构地区：[1]东南大学土木工程学院,南京市210096

出　　处：《公路》2011年第4期8-12,共5页Highway

基　　金：国家自然科学基金资助项目;项目编号50908048

摘　　要：地下连续墙既能防渗挡土又能承受外部竖向和水平荷载,在地铁交通枢纽中的应用越来越广泛。但由于其承载力较大,现场承载力试验资料较少。本文基于墙顶水平荷载作用下软弱土地基中单片地下连续墙的现场试验,研究地下连续墙的水平受力承载性能,确定地连墙的水平临界荷载和极限承载能力,并根据钢筋应变计的数据分析了墙身应变,推算出墙身弯矩和墙侧土抗力,试验结果为超长超厚地下连续墙基础的设计和应用提供了重要依据。Diaphragm wall plays the roles of impermeableness,retaining and bearing vertical and horizontal loads,which is widely used in transport hinge.For its huge bearing capacity,the in-situ data are less quantifier.Based on field test of monolithic diaphragm wall under horizontal load of soft foundation,the bearing capacity of the diaphragm wall is studied,the critical load and ultimate bearing capacity are determinied.According to steel strain gauge data analysis,it figures out the bending moment of the wall and the lateral soil resistance,which provides an important design and application basis for ultra-long and ultra-thick diaphragm wall.

关 键 词：水平载荷试验 临界荷载 极限承载能力 墙身弯矩 墙侧土抗力 

分 类 号：U443.164[建筑科学—桥梁与隧道工程]