大直径盾构隧道扩挖地铁车站的力学性能研究

›› 2010, Vol. 31 ›› Issue (S2): 281-287.

大直径盾构隧道扩挖地铁车站的力学性能研究

丁德云^{1, 2}，鲁卫东¹，杨秀仁¹，刘维宁²，颜莓³

1. 北京城建设计研究总院有限责任公司，北京 100037；2. 北京交通大学土木建筑工程学院，北京 100044； 3. 天津市市政工程设计研究院, 天津 300051

收稿日期:2010-02-01 出版日期:2010-12-10 发布日期:2011-01-12
作者简介:丁德云，男，1980年生，博士，主要从事地下工程建造技术、城市轨道交通运营环境影响研究。
基金资助:
北京市科技计划重点项目资助（D0604003040921）。

Study of mechanical performance of metro station constructed by enlarging large diameter shield tunnel

DING De-yun ^{1, 2}, LU Wei-dong¹, YANG Xiu-ren¹, LIU Wei-ning², YAN Mei³

1. Beijing Urban Engineering Design and Research Institute Co., Ltd., Beijing 100037, China; 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 3. Tianjin Municipal Engineering Design and Research Institute, Tianjin 300051, China

Received:2010-02-01 Online:2010-12-10 Published:2011-01-12

摘要/Abstract

摘要：

日益复杂的地铁建设环境使得地铁线路布置困难、施工风险加大，同时对施工方法也提出了更为严格的要求。采用大直径盾构建造地铁单洞双线区间并在盾构隧道基础上小规模扩挖形成车站是解决复杂环境下地铁建设的一种新思路。以北京地铁14号线高家园站为背景，提出了在外径10 m的大直径盾构隧道基础上采用CRD(Cross Diaphragm)法扩挖地铁车站的两种方案，利用“地层-结构”相互作用有限元法模拟了车站扩挖施工过程，研究了结构体系的受力转换规律。结果表明：在扩挖施工中，结构受力转换频繁；结构体系的最大轴向应力位置由管片环转移到初期支护，最大剪应力位置转移到封顶块管片；管片环由受压状态为主转向受剪状态为主，初期支护、中隔板、梁柱及临时支撑以受压状态为主；封顶块管片和顶梁上部翼缘处的应力较大，应对这些位置进行加强处理。

关键词: 大直径盾构隧道, 地铁车站, 扩挖, CRD法

Abstract:

A construction method that a running tunnel with two tracks is constructed by large diameter shield machine and moreover a station is built by shallow mining method to enlarge large diameter shield tunnel can be regarded as a new approach to construct metro engineering fast, efficiently, safely and economically; in more and more complicated environment which would lead to difficult layout of metro lines, increasing construction risk and making still stricter demands on construction methods of metro engineering. Taking Gaojiayuan station of Beijing metro line 14 as an engineering background, two schemes for the metro station construction by the CRD (cross diaphragm) shallow mining method to enlarge a large-size shield tunnel with an outer diameter of 10 m are introduced. Two-dimensional finite element models are used to simulate the metro station construction on the basis of the ground-structure interaction. The mechanical performance of the structure of the metro station is obtained. The numerical results show that the structural stress state varies frequently in the process of enlarged excavation. The position of maximum axial stress shifts from the shield segments to the primary lining; and the position of maximum shear stress gradually appears at the key segment. The stress state of the segments shifts from the dominative axial compression to the predominant shear. The primary lining, temporary diaphragms, top and bottom beams and temporary struts are mainly in the compressive status. Compared with other structures, the key segment and top flanges of the top beam are subjected to greater stresses during the construction; furthermore, it is suggested that they should be reinforced.

Key words: large diameter shield tunnel, metro station, enlarged excavation, CRD method

中图分类号:

U 231+.4

丁德云，鲁卫东，杨秀仁，刘维宁，颜莓. 大直径盾构隧道扩挖地铁车站的力学性能研究[J]. , 2010, 31(S2): 281-287.

DING De-yun, LU Wei-dong, YANG Xiu-ren, LIU Wei-ning, YAN Mei. Study of mechanical performance of metro station constructed by enlarging large diameter shield tunnel[J]. , 2010, 31(S2): 281-287.

参考文献

相关文章 15

[1]	刘念武, 陈奕天, 龚晓南, 俞济涛, . 软土深开挖致地铁车站基坑及邻近建筑变形特性研究[J]. 岩土力学, 2019, 40(4): 1515-1525.
[2]	郑刚 ,张涛，程雪松，刁钰,. 天津地铁车站基坑立柱回弹的实测统计分析[J]. , 2017, 38(S1): 387-394.
[3]	陈国兴，陈苏，左熹，戚承志，杜修力，王志华 , . 软土场地地铁车站结构地震反应特性振动台模型试验[J]. , 2016, 37(2): 331-342.
[4]	谷音，庄舒曼，卓卫东，孙颖. 考虑饱和土的地铁车站结构非线性地震反应研究[J]. , 2015, 36(11): 3243-3251.
[5]	周建军，杨振兴 , . 深埋长隧道TBM施工关键问题探讨[J]. , 2014, 35(S2): 299-305.
[6]	徐帮树，丁万涛，刘林军，晏勤，陈诚，. 复杂地铁车站施工对邻近建筑物变形影响数值分析的位移叠加法[J]. , 2014, 35(S2): 619-625.
[7]	龙慧、陈国兴、庄海洋、. 可液化地基上地铁车站结构地震反应特征有效应力分析[J]. , 2013, 34(6): 1731-1737.
[8]	朱炎兵，周小华，魏仕锋，谭勇 , . 临近既有地铁车站的基坑变形性状研究[J]. , 2013, 34(10): 2997-3002.
[9]	王芳，贺少辉，刘军，曹瑞琅 . 盾构隧道结合洞桩法修建地铁车站地表沉降控制标准分析[J]. , 2012, 33(S2): 289-296.
[10]	王霆，罗富荣，刘维宁，李兴高. 地铁车站洞桩法施工对地层和刚性接头管线的影响[J]. , 2011, 32(8): 2533-2538.
[11]	李奎，李志业，高波. 既有地铁车站结构安全性评估方法研究[J]. , 2011, 32(4): 1193-1199.
[12]	孔祥兴，夏才初，仇玉良，张丽英，龚建伍. 平行小净距盾构与CRD法黄土地铁隧道施工力学研究[J]. , 2011, 32(2): 516-524.
[13]	刘杰，姚海林，任建喜. 地铁车站基坑围护结构变形监测与数值模拟[J]. , 2010, 31(S2): 456-461.
[14]	孙锋，张顶立，王臣，房倩，李兵. 劈裂注浆抬升既有管道效果分析及工程应用[J]. , 2010, 31(3): 932-938.
[15]	李伟华，赵成刚，杜楠馨. 软弱饱和土夹层对地铁车站地震响应的影响分析[J]. , 2010, 31(12): 3958-3963.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed