摘要
与常规重力式锚碇基础不同,地连墙复合式锚碇基础通过地连墙与围岩形成整体协同受力体系。而对于基于泥浆护壁法的地连墙结构,墙体侧壁泥皮的存在直接影响复合锚碇承载性能的发挥。在现场泥皮取样测试基础上,开展室内缩尺模型试验。研究表明,泥皮效应弱化了嵌岩地连墙与持力层围岩的整体协同受力特性,改变了复合锚碇极限破坏模式,导致复合式锚碇基础应有的嵌岩效应优势无法发挥,因此显著降低了复合锚碇极限承载力。
Different from the conventional gravity anchorage foundation,the composite anchorage foundation of diaphragm wall forms a whole collaborative stress system through diaphragm wall and surrounding rock.For the diaphragm wall structure based on mud wall protection method,the existence of mud skin on the side wall of the wall directly affects the bearing capacity of the composite anchorage.In this paper,an indoor scale model test is carried out on the basis of on-site mud skin sampling test.The results show that:due to the existence of mud skin effect,the overall collaborative stress characteristics of rock socketed diaphragm wall and surrounding rock of bearing stratum are weakened,the ultimate failure mode of composite anchorage is changed,the advantage of rock socketed effect of composite anchorage foundation can not be fulfilled,and the ultimate bearing capacity of composite anchorage is significantly reduced.
作者
张太科
石海洋
张鑫敏
过超
张宇翔
付佰勇
ZHANG Tai-ke;SHI Hai-yang;ZHANG Xin-min;GUO Chao;ZHANG Yu-xiang;FU Bai-yong(Guangdong Provincial Road Construction Co.Ltd.,Guangzhou 510623,China;CCCC Highway Bridges National Engineering Research Center Co.Ltd.,Beijing,100088,China)
出处
《公路》
北大核心
2022年第3期99-107,共9页
Highway
关键词
复合式锚碇基础
泥皮
地连墙
极限破坏
嵌岩
composite anchorage foundation
mud surface
diaphragm wall
ultimate failure
ravine
