长江地铁隧道地下连续墙施工浇筑数值分析和试验研究  

Study of Numerical Analysis and Field Test on Construction Casting of Diaphragm Wall of Metro Tunnel of Yangtze River

作　　者：魏文晖[1] 王宝辉[1] 王志华[2] 王善谣 魏林春[2] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070 [2]上海隧道工程股份有限公司,上海200082

出　　处：《中国铁道科学》2016年第4期70-77,共8页China Railway Science

基　　金：国家自然科学基金资助项目(51178362);武汉市城建委科技计划项目(201412)

摘　　要：以武汉市长江地铁隧道地下连续墙施工为背景,利用有限元软件ANSYS建立H型钢接头地下连续墙施工浇筑过程的三维有限元模型,模型中考虑了混凝土的自生收缩和弹性模量变化,采用D-P屈服准则模拟泥浆中的填充石料,采用双线性混凝土压力模型对H型钢施加侧向压力,模拟计算动态浇筑过程中H型钢的水平变形和吊梁支座反力的变化规律。结合武汉市长江地铁隧道工程的现场试验,将计算结果与试验结果进行对比分析。研究结果表明:在地下连续墙浇筑过程中,受现浇混凝土凝结效应和侧向压力的综合影响,H型钢的水平变形为先增大后回缩;吊梁支座的总反力为先增加后下降,并且最大值约为钢筋笼有效重量的2倍,因此在实际施工中应予以足够的重视;计算结果与现场试验结果基本一致,验证了数值分析方法的合理性和精度,并可为同类工程施工提供理论参考。Taking the diaphragm wall construction of the metro tunnel of the Yangtze River in Wuhan as background,the three-dimensional finite element model for the construction casting process of the diaphragm wall with H-section steel joint was established by ANSYS.The model,which considered the autogenous shrinkage of concrete and the changes of elastic modulus,adopted the D-P yield criterion to simulate the filling stone in slurry and applied bilinear concrete lateral pressure inside H-section steel web,could simulate the horizontal displacement of H-section steel and the support reaction force of lifting beam in the dynamic casting process.The field test of the metro tunnel of the Yangtze River was carried out and the results were compared with the calculation results.The results showed that,in the casting process of diaphragm wall,the horizontal deformation of H-section steel increases first and then decreases with the comprehensive effects of cast-in-site concrete condensation and lateral pressure.The total support reaction force of lifting beam increases first and then decreases and the maximum value is about 2times as much as the effective weight of the reinforcement cage in the casting process,so enough attention should be paid in practical construction.The calculation results and field test results are basically in accordance,which verifies the rationality and accuracy of the numerical analysis method,and the results can provide theoretical reference for similar engineering construction.

关 键 词：地铁隧道 地下连续墙 施工浇筑 H型钢水平变形 吊梁支座反力 

分 类 号：TU476.3[建筑科学—结构工程]