摘要
以井筒式地下连续墙为研究对象,采用数值模拟的研究方法,应用弹性本构模型,考虑墙土界面的参数影响,对单室和四室井筒式地下连续墙基础的沉降特性、内外侧摩阻力、端阻力、土芯顶部反力及其荷载分担比进行分析和研究。研究表明:外摩阻力主要由墙身深度范围内的外侧下部土体提供,内摩阻力主要由土芯下部土体提供;外摩阻力自上而下发挥作用,而内摩阻力自下而上发挥作用。随着荷载的增加,单室井筒式地下连续墙的外侧摩阻力的荷载分担比逐渐减小,而端承反力、内侧摩阻力和土芯顶反力的荷载分担比都在增加,而四室井筒式地下连续墙的外侧摩阻力、墙端反力、土芯顶反力都在减小,仅有内摩阻力的荷载分担比在增加。
This paper takes the wellbore type underground diaphragm wall as the research object,adopts the numerical simulation research method,applies the elastic constitutive model,and considers the influence of the parameters of the wall-soil interface,analyzes and studies the settlement characteristics,inner and outer friction resistance,end resistance,core top reaction and load sharing ratio of the foundation of the single and four-compartment wellbore underground diaphragm wall.The results show that:the external friction resistance is mainly provided by the soil below the wall depth,and the internal friction resistance is mainly provided by the soil below the core;the external friction resistance plays a role from the top down,while the internal friction resistance plays a role from the bottom up.With the increase of load,the load sharing ratio of the external friction resistance of the single-chamber shaft type underground diaphragm wall gradually decreases,while the load sharing ratio of the end-bearing reaction,inner friction resistance and earth core top reaction increases;while the external friction resistance,wall end reaction and earth core top reaction of the four-chamber shaft type underground diaphragm wall decrease,and only the load sharing ratio of the internal friction resistance increases.
作者
吴郡
何泽平
解维佳
阙木泰
冉玉
Wu Jun;He Zeping;Xie Weijia;Que Mutai;Ran Yu(Chongqing Three Gorges University,Chongqing 404100,China;Chongqing Wanzhou Construction Engineering Group Co.,Ltd.,Chongqing 404100,China)
出处
《山西建筑》
2024年第8期78-82,共5页
Shanxi Architecture
关键词
井筒式地下连续墙
沉降
内摩阻力
外摩阻力
荷载分担比
shaft type diaphragm wall
settlement
internal friction
external friction
load sharing ratio
