[1]胡志平,朱启东,赵振荣,等.盾构隧道衬砌结构小角度斜穿地裂缝的破坏机理[J].西安科技大学学报,2011,(04):425-432.
 HU Zhi-ping,ZHU Qi-dong,ZHAO Zhen-rong,et al.Modeling test of deformation and damage mechanism of shield tunnel intersection ground fracture with small angle[J].Journal of Xi'an University of Science and Technology,2011,(04):425-432.
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盾构隧道衬砌结构小角度斜穿地裂缝的破坏机理()
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2011年04期
页码:
425-432
栏目:
出版日期:
2011-07-11

文章信息/Info

Title:
Modeling test of deformation and damage mechanism of shield tunnel intersection ground fracture with small angle
文章编号:
1672-9315(2011)04-0425-08
作者:
胡志平12朱启东3赵振荣3余海见1黄 伟1
1.长安大学 建筑工程学院,陕西 西安 710061; 2.西部矿产资源与地质工程教育部重点实验室,陕西 西安 710054; 3.中国中铁二院西安勘察设计研究院有限责任公司,陕西 西安 710054
Author(s):
HU Zhi-ping12ZHU Qi-dong3ZHAO Zhen-rong3YU Hai-jian1HUANG Wei1
1. School of Civil Engineering,Chang'an University,Xi'an 710061,China; 2. Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054,China; 3. Xi'an Survey and Design Institute Co. Ltd, China Railway Eryuan Engineering Group, Xi'an 710054,China
关键词:
地裂缝 管片衬砌 盾构隧道 模型试验 破坏机理
Keywords:
ground fissure segment lining shield tunnel modeling test damage mechanism
分类号:
U457.2;TU311.2
文献标志码:
A
摘要:
从西安地铁1#线工程背景和西安地裂缝地质环境出发,根据相似理论设计了盾构隧道管片衬砌结构30°斜穿地裂缝的物理模型试验。管片混凝土应变、纵向和环向螺栓应变、结构接触土压力外围土压力、结构内部收敛位移、模型顶表面土体变形以及宏观变形破坏现象表明:盾构隧道管片衬砌结构30°斜穿地裂缝的变形破坏模式为剪切变形为主,局部有扭转变形; 结构破坏范围为上盘1.25D,下盘0.75D(D为管片环外径); 管片衬砌结构变形破坏不对称,管片环向处于偏压状态; 环缝拱底位错量大于拱顶和拱腰,拱底最大位错量达40 mm(0.033D),模型难以适用地裂缝错动变形20 cm(0.1667 D),盾构管片衬砌结构不适用于地裂缝活动强烈的地质环境。
Abstract:
Based on the Xi'an metro engineering and the geological environment of Xi'an ground fissure, the segment lining structure physical modeling experiment of shield tunnel cross the ground fissure with 30° is designed according to the similar theory. The strain of segment concrete, of longitudial bolt and circumferential bolt, the contact soil pressure and peripheral soil pressure, convergence displacement of segment lining, the soil settlement on the top of model and other macrophenomena show that the main deformation and damage of segment lining structure of shield tunnel cross the ground fissure with 30 degree is shearing with distortion on local; the deformation and damage range is from 1.25D(D is the external diameter of segment ring)in the hanging side to 0.75D in the lyingside; the deformation and damage of segment ring is asymmetric and partial compressive; the disloation of circumferential seam on the soffit which is up to 40mm(0.033D)is bigger than that of crown and arch waist. It is difficult for the segment lining to apply the 20cm(0.166 7D)deformation of ground fissure, and the segment lining structure of shield tunnel is unsuitable to the geological environment with violent activity of ground fissure.

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备注/Memo

备注/Memo:
收稿日期: 2011-03-14 基金项目: 国家自然科学基金项目(40602033); 国家自然科学基金项目(41072221); 中央高校基本科研业务费专项资金项目(CHD2010ZD002); 长安大学科技创新重点项目 通讯作者: 胡志平(1973-),男,湖南益阳人,工学博士,副教授,主要从事地下结构与岩土工程等方面的教学和科研工作.
更新日期/Last Update: 2011-07-11