管片上浮模型试验平台研制  

Development of A Segment Uplift Model Test System

作　　者：王海涛 王悦 孙九春[1] WANG Haitao;WANG Yue;SUN Jiuchun(Tengda Construction Group Co.,Ltd.,Shanghai 200122,China)

机构地区：[1]腾达建设集团股份有限公司,上海200122

出　　处：《隧道建设(中英文)》2025年第1期132-138,共7页Tunnel Construction

基　　金：浙江省重点研发计划项目(2022C01168)。

摘　　要：为深入探究盾构施工中管片上浮的关键因素,特别是浆液性质对管片上浮的影响规律,设计管片上浮荷载感知测量结构,自主研发具有可视化特性的管片上浮模型试验平台。通过数值分析和注水测试,验证该试验平台结构的安全性和功能的可实施性,得到管片受浮力大小的系统测量误差。试验结果表明:1)注浆过程中管片受上浮荷载的变化与注浆体积呈线性关系,R^(2)值均大于93%,管片平均上浮荷载线性变化率是理论上浮荷载线性变化率的62.6%,与理论计算值相差28.79N/cm。2)浮动密封内油脂对管片上浮存在抑制作用,产生的阻力约为理论上浮荷载的41.1%,实际上浮荷载与理论上浮荷载最大误差约2.1%,能够较为准确地模拟管片上浮的受力情况。3)截面荷载增长率随注浆体积的变化呈现出先减小后增大的趋势,管片的横向位移约束对管片受倾覆荷载产生的姿态偏移具有较好的控制效果。To investigate the primary factors influencing segment uplift during shield tunneling,particularly the effect of grout properties on segment uplift,a load-sensing measurement structure for segment uplift is designed,and a visualized model test system is independently developed.The structural safety and functional feasibility of the system is verified through numerical analysis and water injection tests,and the system′s measurement error for uplift force on the segment is determined.The results reveal the following:(1)The change in uplift load on the segments during grouting is linearly related to the grout volume,with R^(2) values exceeding 93%.The average linear rate of change in uplift load is 62.6%of the theoretical value,with a difference of 28.79 N/cm compared to theoretical calculations.(2)Grease in the floating seal chamber inhibits segment uplift,generating resistance equivalent to approximately 41.1%of the theoretical uplift load.The maximum deviation between the actual and theoretical uplift loads is approximately 2.1%,indicating that the system accurately simulates the force conditions of segment uplift.(3)The cross-sectional load growth rate initially decreases and then increases as the grout volume changes.The transverse displacement constraint of the segments effectively controls horizontal displacement caused by overturning loads on the segments.

关 键 词：盾构施工 管片上浮 模型试验平台 注浆 上浮荷载 

分 类 号：U45[建筑科学—桥梁与隧道工程]