克泥效工法对盾构隧道地表变形的作用规律研究
Action law of clay shock construction method on surface deformation of shield tunnels
孙萌萌 1师文豪 2徐阳 1吴静红 2樊绿叶3
作者信息
- 1. 苏州科技大学土木工程学院,江苏 苏州 215011
- 2. 苏州科技大学土木工程学院,江苏 苏州 215011;昆山市地下空间技术研究院有限公司,江苏 苏州 215300
- 3. 昆山市建设工程质量检测中心,江苏苏州 215337
- 折叠
摘要
软土地区盾构施工面临着严峻的地表变形问题,克泥效工法辅助盾构施工是缓解地表变形的重要控制措施.为探究克泥效工法对盾构隧道地表变形的影响规律,依托苏州轨道交通11 号线玉-珠区间盾构工程,首先开展克泥效浆液压缩试验,得到浆液压缩变形规律;然后建立克泥效工法下盾构隧道双等代层有限元模型,模拟研究克泥效注浆工法对地表变形的影响规律.研究表明:克泥效浆液的压缩变形曲线近似符合线性关系,克泥效浆液性能受B液添加率影响明显,当B液添加率为4%时,克泥效浆液抵抗变形能力最强;建立的双等代层模型能够模拟克泥效工法对盾构隧道地表变形的影响特征,克泥效工法辅助盾构可减少约78%的地表最大沉降量;克泥效浆液填充率对地表沉降影响显著,填充率约150%时,对地表沉降的控制效果相对最好.研究结果可为克泥效工法在类似盾构隧道工程中的应用提供参考.
Abstract
Shield construction in soft soil areas faces serious surface deformation problems.Clay shock construction method is an important control measure to alleviate surface deformation.In order to study the action law of clay shock construction method on the surface deformation of shield tunnels,based on the shield project of Yu-Zhu section of Suzhou Rail Transit Line 11,the com-pression test of clay shock slurry was carried out first,and the slurry compression deformation law was obtained.Then,the finite el-ement model of the double equivalent layer of the shield tunnel under the clay shock grouting method was established to study the influence of clay shock construction method on the surface deformation.The results showed that the compression deformation curve of the slurry was approximately linear,and the performance of the slurry was obviously affected by the addition rate of liquid B.When the addition rate of liquid B was 4%,the slurry had strong resistance to deformation.The established double equivalent lay-er model can perfectly simulate the influential characteristics of the clay shock method on the surface deformation,and the clay shock method assisting shield construction can reduce the maximum surface settlement by about 78%.The filling rate of clay slur-ry had a significant effect on the surface subsidence.When the slurry filling rate was about 150%,the control effect on the surface subsidence was the best.The research results provide reference for the application of the clay shock method in shield tunnel engi-neering.
关键词
盾构隧道/地表沉降/克泥效工法/浆液填充率/双等代层模型Key words
shield tunnel/surface deformation/clay shock/slurry filling rate/double equivalent layer model引用本文复制引用
基金项目
国家自然科学基金青年科学基金(42202306)
江苏省研究生实践创新计划(SJCX22_1582)
江苏省自然科学基金(BK20200993)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据