邻近隧道的岩质深基坑变形监测分析

姜兆华; 张永兴; 蔡宇; 商克俭

doi:10.13204/j.gyjz201207015

邻近隧道的岩质深基坑变形监测分析

doi: 10.13204/j.gyjz201207015

姜兆华^1,2,
张永兴^1,2,
蔡宇^1,2,
商克俭³

1.
1 重庆大学土木工程学院重庆 400030;
2.
2 重庆大学山地城镇建设与新技术教育部重点实验室重庆 400030;
3.
3 武汉工业学院多孔介质力学研究所武汉 430023

基金项目:

十一五国家科技支撑计划课题(2008BAJ06B04-2);黔科合重大专项(字[2008]6018)

详细信息

作者简介:
姜兆华，男，1983年出生，博士研究生。Email：jzhyantu@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2011-11-30
- 刊出日期: 2012-07-20

MONITORING AND ANALYSIS OF DEFORMATION OF DEEP ROCK EXCAVATION ADJACENT TO TUNNELS

1.
1. College of Civil Engineering,Chongqing University,Chongqing 400030,China;
2.
2. Key Laboratory of New Technology for Construction of Town in Mountainous Area of Ministry of Education,Chongqing University,Chongqing 400030,China;
3.
3. Institute of Pyrotechnics,Wuhan Polytechnic University,Wuhan 430023,China

摘要

摘要: 以重庆某开挖深度近30 m、周围存在邻近隧道的岩质深基坑工程为例,介绍了支护桩加锚索、支护桩加分阶预留岩墙两种围护体系及基坑监测方案,并结合数值模拟对主要监测成果进行分析。分析结果表明:支护桩加分阶预留岩墙作为邻近隧道岩质基坑围护体系非常有效,桩身变形主要集中于土层部分,对坡顶部位进行加固,可有效提高边坡整体稳定性;邻近隧道会改变周围地表最大沉降点位置,其位置与隧道拱顶相对应;由于受连续介质及隧道几何形态的影响,围岩会改变位移场传递的方向,隧道主要表现为横向变形。
- 邻近隧道 /
- 岩质基坑 /
- 分阶支护 /
- 桩锚支护 /
- 变形监测
Abstract: According to the practical engineering of rock deep excavation with a depth about 30 m adjacent to thesubway tunnel in Chongqing, two kinds of supporting scheme were introduced. One was the retaining pile and anchorcable, and the other was the reserved rock wall and the retaining pile. Based on the numerical simulation, the mainmonitored results were analyzed. The result showed that deformation of rock excavation was small; the retaining pileand reserve rock wall could effectively control the displacement of the excavation in rock adjacent to tunnel. The maindeformation of supporting structures concentrated in soil strata in rocky area. The overall stability of the slope couldbe improved by reinforcing the top of slope. The position of the biggest settlement points influenced by the existenceof the adjacent tunnel was corresponding to the vault of tunnels, and the lateral deformation was dominant in thetunnel. The displacement field of the rock would changed owing to the inflnences of continuous media and the changeof tunnel geometric shape, the lateral deformation of the funnel was remarked.
- adjacent to tunnel /
- rock excavation /
- supporting by step /
- anchor pile supporting system /
- deformation monitoring

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参考文献(11)

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