顶管开挖引起土体沉降与应变相关性研究  

Research on the Correlation between Soil Settlement and Strain Caused by Top Pipe Excavation

作　　者：吕鸿 郜佳琳 LV Hong;GAO Jialin(School of Economics and Management,Civil Aviation Flight University of China,Guanghan 618300,China;Shandong Airport Management Group Co.,Ltd,Construction Headquarters Project Division 1,Jinan 250000,China)

机构地区：[1]中国民用航空飞行学院经济与管理学院,四川广汉618300 [2]山东机场管理集团有限公司建设指挥部工程一部,山东济南250000

出　　处：《建筑经济》2024年第S01期540-543,共4页Construction Economy

基　　金：机场建筑保护与再利用模式研究(QJ2022-90);中央高校基本科研业务费专项资金资助(PHD2023-030,ZHMH2022-014);民航管理科学与工程研究所(JG2022-24);中飞院新建本科专业标准及实验教学平台建设(MHJY72023027)。

摘　　要：地层损失是造成顶管开挖环境影响的主要因素。关于地层损失造成的影响,传统方法仅以地表沉降做为监测手段,由于沉降做为土体内部变形的累积之后在地表的表现,具有一定滞后性。因此采用土体中应变做为主要手段进行顶管施工影响的监测成为了一种趋势。本文以经典源汇法出发,研究由地层损失造成的土体内部应变,并采用有限元仿真计算由于地层损失造成土中的应变值,通过对比来验证理论的可靠性。结果表明由于地层损失造成土中沉降与应变具有很好的相关性,以应变作为顶管开挖影响的监测指标可行性强、敏感性高。Formation loss is the main factor affecting the environment of pipe jacking excavation.As for the influence caused by formation loss,the traditional method only takes surface subsidence as the monitoring method.As the settlement is the accumulation of the internal deformation of soil mass,it has a certain hysteresis on the surface.Therefore,it has become a trend to monitor the influence of pipe jacking by using strain in soil as the main method.Based on the classical source-sink method,the internal strain of soil caused by stratum loss is deduced.The finite element simulation is used to calculate the strain value of soil due to formation loss,and the reliability of the theory is verified by comparison.The results show that there is a good correlation between soil settlement and strain due to formation loss,and it is feasible and sensitive to use strain as a monitoring index for pipe jacking excavation.

关 键 词：顶管法 地层损失 源汇法 间隙参数 土体应变 

分 类 号：TU443[建筑科学—岩土工程]