扩挖盾构隧道建成两连拱地铁车站模型试验

›› 2008, Vol. 29 ›› Issue (12): 3261-3265.

扩挖盾构隧道建成两连拱地铁车站模型试验

李围^1，2，何川²，张海波²

1. 贵州大学土木建筑工程学院，贵阳 550003；2. 西南交通大学地下工程系，成都 610031

收稿日期:2007-04-16 出版日期:2008-12-10 发布日期:2013-08-11
作者简介:李围，男，1979年生，博士，副教授，主要从事铁路、公路和地铁盾构隧道以及水底隧道的科研工作

Model test of twin-bore metro station constructed with expanding shield tunnel

LI Wei^{1, 2}, HE Chuan², ZHANG Hai-bo²

1. School of Architecture & Civil Engineering, Guizhou University, Guiyang 550003, China; 2. Department of Tunnel & Underground Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received:2007-04-16 Online:2008-12-10 Published:2013-08-11

摘要/Abstract

摘要： 采用模型试验进行了扩挖盾构隧道建成两连拱隧道地铁车站的施工方案研究，重点研究扩挖施工的可行性和地层位移规律。同时，采用有限差分法进行了扩挖施工全过程二维数值模拟对比分析。结果表明，采用中导洞法扩挖建成两连拱隧道地铁车站的施工方案是可行的，但需进行拱脚和拱顶加固。施工完成后地层竖向位移场呈U型分布，随着加固地层力学参数的提高，地层位移减小，拱脚加固能够有效地减小地层位移。地表沉降曲线为近似正态分布，其宽度为3倍的车站结构总宽度。

关键词: 地铁车站, 区间盾构隧道, 两连拱隧道, 扩挖施工, 模型试验

Abstract: By using model test, construction schemes for metro station of twin-bore tunnel with expanding construction based on shield tunnels are studied. Main research contents are the feasibility of expanding construction method and the displacement rule of stratum displacement. The contrast between results of the model test and 2D numerical simulation of the expanding construction with the finite difference method is carried out. Results show that the construction scheme for metro station of twin-bore tunnel with expanding construction by central drift method is feasible. But reinforcing the surrounding rock of the bottom and vault of tunnel arches are necessary during the expanding construction. The vertical displacement distribution of surrounding rock appears the U-shape after expanding construction. The displacement of surrounding rock decreases with its mechanical parameters. Reinforcing the surrounding rock at the bottom of tunnel arches is an effective method for reducing its displacement. The settlement curve of the ground surface appears approximately normal distribution, and the influencing breadth is 3 times as breadth as station of twin-bore structure.

Key words: metro station, sectional shield tunnel, twin-bore tunnel, expanding construction, model test

中图分类号:

U 451

李围，何川，张海波 . 扩挖盾构隧道建成两连拱地铁车站模型试验[J]. , 2008, 29(12): 3261-3265.

LI Wei , HE Chuan , ZHANG Hai-bo . Model test of twin-bore metro station constructed with expanding shield tunnel[J]. , 2008, 29(12): 3261-3265.

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