摘要
以深圳地铁7号线笋岗站-洪湖站区间为研究对象,采用FLAC3D软件,对叠线盾构隧道下穿广深铁路股道施工引起的沉降进行了数值模拟计算。计算结果表明:加固前地表引起轨道沉降1.6cm左右;对砂质黏性土、全风化地层和强风化地层采用了注浆加固后,其加固范围为上下24m、左右为隧道直径的3倍,共42m,其沉降值为2.6mm,满足轨道对沉降容许值5mm的要求。
Taking Sungang-Honghu section of Shenzhen Metro Line 7 as the research object, the settlement of overlapped sectional tunnels under railway tracks was calculated with the numerical modeling software FLAC3D. The results show that the maximum track settlement is 1. 6 cm before grouting the stratum under railway tracks. The settlement is reduced to 2. 6mm after reinforcement of sandy soil and the fully weathered and strongly weathered strata by grouting, which is less than the acceptable track settlement of 5 mm. The horizontal reinforcement range is about 42 m, which is 3 times the diameter of the tunnel, and the vertical range is 24 m.
作者
李围
陈薪如
叶建忠
任立志
吴钢锋
LI Wei CHEN Xin-ru YE Jian-zhong REN Li-zhi WU Gang-feng(School of Railway Transportation, Shanghai Institute of Technology, Shanghai 201418, China Zhejiang Provincial Institute of Communications Planning, Design and Research, Hangzhou 310006, Zhejiang, China PowerChina Railway Construction Co. , Ltd. , Beijing 100044 School of Civil Engineering and Architecture, Ningbo Institute of Technology of Zhejiang University, Ningbo 315100, Zhejiang, China)
出处
《筑路机械与施工机械化》
北大核心
2017年第6期106-108,共3页
Road Machinery & Construction Mechanization
基金
浙江省公益与社会发展项目(2014C33054)
宁波自然科学基金(2015A610301)
关键词
地铁
区间叠线隧道
下穿铁路
沉降计算
metro
overlapped sectional tunnel
under railway
settlement calculation
