摘要
依托杭州望江路泥水盾构隧道工程,针对钱塘江水位的潮汐变化特征进行了分析,通过埋设测试元件,监测了右线375环断面处管片衬砌的土压力、孔隙水压力以及管片内力。研究表明,监测环离开挖面的距离达到15环以上地层才能基本稳定。水位与衬砌外水压力呈正相关变化,对比理论计算值,潮汐导致的水压力变化经该地层传递到隧道管片后有45%~77%的折减。潮位变化对管片结构安全系数的影响甚小。
Relying on the slurry shield tunnel project of Wangjiang Road in Hangzhou,the tidal change characteristics of the water level of the Qiantang River are analyzed,the earth pressures,pore water pressures and segment internal forces of the segment linings at the section 375 of the right line are monitored by embedding test elements.The studies shown that the formation can only be stabilized if the distance from the monitoring ring to the excavation face is more than 18 rings.There is a positive correlation between the water level and the external water pressure of the linings,and the tide-induced change in water pressure is reduced by 45%to 77%after passing through the stratum to the tunnel segment compared with the calculated values.The change of tideal level has small effects on the safety factor of the segment structures.
作者
阳军生
戴勇
房中玉
章怡
龚方浩
YANG Jun-sheng;DAI Yong;FANG Zhong-yu;ZHANG Yi;GONG Fang-hao(School of Civil Engineering,Central South University,Changsha 410075,China;China Railway 14th Bureau Group Shield Engineering Co.,Ltd.,Nanjing 211899 China;China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2020年第S01期203-207,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(51878669)
关键词
潮汐
大直径盾构
管片
压力
安全系数
tide
large-diameter shield
segment
pressure
safety factor
作者简介
阳军生(1969-),男,教授,博士生导师,主要从事隧道相关方面教学与研究。E-mail:jsyang@csu.edu.cn。
