南京地铁盾构隧道盾尾刷更换过程地表变形分析  

Surface Deformation of Shield Tail Brush Replacement in Nanjing Subway

作　　者：郭建强 李长春 徐源 高永 李俊才[2,3] 张志铖 

机构地区：[1]南京地下铁道有限责任公司,南京高级工程师210008 [2]南京南大岩土工程技术有限公司,南京210008 [3]南京工业大学土木工程学院,南京210009

出　　处：《城市轨道交通研究》2010年第1期26-30,共5页Urban Mass Transit

摘　　要：盾尾密封刷是盾构机的主要组成部分。完好的盾尾密封刷是保证盾构机不发生漏浆的前提条件。当盾尾密封刷出现磨损、盾尾严重漏浆时,必须及时更换。以南京地铁土压平衡盾构机盾尾密封刷更换为背景,介绍盾尾密封刷的更换过程;采用泊松曲线沉降预测的研究方法,分析盾尾刷更换期间地表变形,说明盾尾刷更换方法合理、盾尾0.6～0.8MPa的注浆压力科学合理,保证了盾尾密封刷安全更换。The shield tail seal brushe is a key component of shield machine and its good condition will guarantee the machine operation without leaking,therefore,it shall be replaced in time when the shield tail seal brushes present some attrition.However the replacement technology of tail brushes have not been given enough attention to and its study is even less.This paper takes the replacement of tail brushes during earth-pressure balance process in Nanjing subway as background,introduces the replacing process,reasonable replacing ways and means through a Poisson Curve Settlement Forecast study,illuminates the scientific grouting pressure scope something like 0.6~0.8 MPa,so as to secure the replacement.

关 键 词：盾构隧道 盾尾密封刷更换 地表沉降 注浆 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]