地铁盾构水土中接收对封堵墙扰动作用的研究  

Study of Disturbance Effect on Plugging Wall of Subway Shield Machine Received in Soil and Water Mixture

作　　者：梅君 王勇 梁宸 Mei Jun;Wang Yong;Liang Chen(Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200032,China;State Key Laboratory of Intelligent Construction and Healthy Operation&Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]上海隧道工程有限公司,上海200032 [2]中国矿业大学深地工程智能建造与健康运维全国重点实验室,江苏徐州221116

出　　处：《科技通报》2024年第11期57-62,共6页Bulletin of Science and Technology

摘　　要：盾构机破洞而出进入接收井的过程可能会引发水砂涌入地铁车站,同时导致周边地面沉降、地面塌陷、附近建筑物损坏等问题。为规避此类风险,本文以南京地铁十一号线珠江南站盾构接收工程为例,在接收井建立混凝土临时封堵墙,并向接收井内回灌泥水,实现水土中的盾构接收。通过现场实测数据分析,盾构机进入接收井过程中,开挖泥水而对封堵墙产生扰动作用。结果表明:封堵墙底部的水土压力大于盾构中心高度处水土压力;盾构正对面水压力大于侧面水压力,由于盾构机进洞对侧向有挤土效应,导致侧面有效应力大于盾构正对面两端点的有效应力;盾构正对面中下方测点水土压力最大,依据该点监测数据和工程实际中液位变化情况,采用“增大示数法”量化盾构机进入接收井过程中对封堵墙的扰动作用,将扰动荷载取值为40 kPa。研究成果可为水土中盾构接收工程的施工方案和接收井封堵墙设计提供理论指导。When the shield machine enters the receiving well,it may cause water and sand to flood into the subway station,and lead to subsidence and collapse of surrounding ground and damage of nearby buildings.In order to avoid such risks,taking the shield machine receiving project of Zhujiang South Station of Nanjing Metro Line 11 as an example,concrete temporary plugging wall was built in the receiving well,and then soil and water mixture was injected into the receiving well to conduct shield machine receiving in it.Based on the on-situ measurement data,the disturbance effect caused by soil and water mixture excavation in the process of shield machine entering the receiving well was analyzed.The analysis results show that the soil and water pressure at the bottom of the plugging wall is greater than that at the height of the shield machine center;The water pressure on the opposite side of the shield is greater than that on the lateral side,The lateral effective stress is bigger than it on the two ends directly opposite the shield machine because of the squeezing effect on the lateral side;The soil and water pressure is the highest at the measuring point at lower-middle location directly opposite the shield machine,according to the monitoring data of this point and the liquid level change condition in the actual project,the disturbance effect on the plugging wall when the shield machine enters the receiving well is quantified by Increment Method,and the disturbance load is set as 40 kPa.The research results can provide theoretical guidance for the scheme of shield machine receiving engineering in soil and water mixture and the plugging wall design of receiving well.

关 键 词：盾构 水土中接收 接收井 封堵墙 扰动作用 

分 类 号：TU94[建筑科学—建筑技术科学]