摘要
以绍兴轨道交通1号线某盾构隧道施工为例,分别采用日本弹性薄板理论、静力理论和滑移失稳理论计算盾构始发端头加固范围,并利用ABAQUS建模分析,得到盾构始发端头在不同加固范围内土体位移和应力变化曲线,再将模拟结果与工程实测数据进行对比分析。结果表明:纵向加固长度为6 m,横向加固长度为3 m为绍兴软土地区盾构始发端头加固合理范围;日本弹性薄板理论计算获得的纵向加固长度与经过模拟分析、工程实测综合判定的纵向加固长度相近,可采用弹性薄板理论初步确定绍兴软土地区的纵向加固长度。
This paper presents a case history of estimating the soil improvement zone for the launching end of the Tunnel Boring Machine excavation method in soft soil in Shaoxing Transit Line No.1.The improvement zone is estimated by three different approaches:namely,elastic plate theory,static approach and sliding instability theory.Numerical analysis of soil deformation and strain at various location of the soil improvement zone was performed by finite element software ABAQUS.The analytical results were compared with the construction monitoring data.The results show that:an improvement zone with a length of 6 meters in the longitudinal direction and a width of 3 meters in transverse direction is appropriate for the launching end of the TBM excavation.The longitudinal length of the improvement zone estimated by elastic plate theory is close to the results of numerical and monitored data.Therefore,the elastic plate theory should be applied in this project.
作者
马高峰
朱金贤
曹丙柄
吴祥泰
MA Gaofeng;ZHU Jinxian;CAO Bingbing;WU Xiangtai(Shaoxing Rail Transit Group Co.Ltd.,Shaoxing 312000;College of Civil Engineering,Shaoxing University,Shaoxing 312000)
出处
《土工基础》
2021年第2期139-143,147,共6页
Soil Engineering and Foundation
关键词
盾构始发
端头加固
理论计算
数值模拟
工程实测
TBM launching end
end improvement zone
theoretical analysis
numerical simulation
engineering monitoring
