摘要
虎门二桥泥州水道桥的基础为采用地下连续墙作支护结构的重力式锚碇,其底部嵌入泥岩。为掌握施工开挖过程中地下连续墙的受力与变形特点,对西锚碇的径向位移、竖向应变以及墙外土压力进行监测,并利用有限单元法对其施工过程进行数值模拟,将模拟结果与监测结果进行对比分析。结果表明:在开挖过程中,帽梁、内衬以及嵌入的岩体与地下连续墙的相互作用会引起墙体产生独特的变形特征;墙外土压力随深度呈R型分布。
The diaphragm wall has been used as the anchorage foundation for support system in Nizhou Waterway Bridge of the Second Humen Bridge.In this paper,the lateral displacement,the vertical strain and the earth pressure outside the wall of the west anchorage were systematically monitored to study the force and deformation characteristics of the diaphragm wall during excavation.The numerical analysis from the FEM approach were then used to simulate the process of excavation and compared with monitoring results.The results of the monitoring and analysis indicated that the cap beam,lining and Rock-socketed section could arise unique deformation characteristics of diaphragm wall during excavation.The distribution of earth pressure outside the wall was R-type.
作者
程晔
袁鹏
陈旭浩
过超
Cheng Ye;Yuan Peng;Chen Xuhao;Guo Chao(Department of Civil Engineering and Airport Engineering,Nanjing University of Aeronautics and Astronautics,210016,China;Jiangsu Airport Infrastructure Safety Engineering Research Center,Nanjing 210000,China;Landsea Group,Nanjing 210004,China;China Communication Highway Planning and Design Institute,Beijing 100088,China)
出处
《特种结构》
2020年第3期101-106,共6页
Special Structures
基金
国家自然科学基金面上项目(51678305)。
关键词
地下连续墙
锚碇基础
内衬
承载性能
开挖
Diaphragm wall
Anchorage foundation
Lining
Bearing capacity
Excavation
