北京地铁敞口式盾构掘进对砂层土体扰动规律研究

doi:10.12068/j.issn.1005-3026.2016.04.025

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (4): 572-577.DOI: 10.12068/j.issn.1005-3026.2016.04.025

北京地铁敞口式盾构掘进对砂层土体扰动规律研究

张箭¹，王树英¹，阳军生¹，张细宝²

(1. 中南大学土木工程学院，湖南长沙410075； 2. 中铁五局集团有限公司，湖南长沙410205)

收稿日期:2015-07-10 修回日期:2015-07-10 出版日期:2016-04-15 发布日期:2016-04-05
通讯作者: 张箭
作者简介:张箭(1989-)，男，安徽芜湖人，中南大学博士研究生；阳军生(1969-)，男，湖南永兴人，中南大学教授，博士生导师.
基金资助:
国家自然科学基金青年基金资助项目(51208516)；中央高校基本科研业务费专项资金资助项目(2014zzts045).

Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum

ZHANG Jian¹， WANG Shu-ying¹， YANG Jun-sheng¹， ZHANG Xi-bao²

1. School of Civil Engineering， Central South University， Changsha 410075， China; 2. China Railway Wuju Group Corporation， Changsha 410205， China.

Received:2015-07-10 Revised:2015-07-10 Online:2016-04-15 Published:2016-04-05
Contact: ZHANG Jian
About author:-
Supported by:
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摘要/Abstract

摘要： 敞口式盾构在砂层掘进时会扰动周围土体，易引起地层坍塌.以北京地铁6号线2期敞口式盾构施工段为工程背景，阐述了国内首台挤压式敞口盾构机机体构造及开挖工序，通过地表沉降和地中水平位移监测，研究了盾构掘进对砂层的扰动特征.结合盾构掘进参数分析，探讨了减少土体扰动的控制措施.研究表明，盾构接近测孔区阶段，土体变形规律最复杂；通过和刚脱离测孔区阶段是土层变形控制的重要环节；盾构隧道轴线两侧1.5倍洞径范围内是土体扰动主要区域.所得结论可为砂土地层敞口式盾构施工地层位移控制提供可鉴参考.

关键词: 敞口式盾构, 砂质地层, 开挖工序, 地层扰动, 变形特征

Abstract: The open-face shield tunneling the sand stratum can affect the surrounding soil and may cause collapse with excessive deformation. Based on the open-face shield construction of NO.2 Beijing’s Metro of Line 6， the structure and the comprehensive excavation system of the domestic first open-face shield was explained. The law of disturbance was analyzed by monitoring subsidence and horizontal displacements of the soil. Some measures to reduce soil disturbance were also presented. Results showed that the deformation law of the soil is the most complicated when the shield approaches to the monitoring holes. It is important to have a good control on the soil deformation when the shield is passing through and leaving monitoring holes. The range of the disturbance area can be 1.5 times the hole diameter from the shield. The conclusion can be used as a reference for controlling the deformation induced by shield construction in sandy stratum.

Key words: open-face shield, sandy stratum, excavation system, soil disturbance, deformation characteristics

中图分类号:

张箭，王树英，阳军生，张细宝. 北京地铁敞口式盾构掘进对砂层土体扰动规律研究[J]. 东北大学学报:自然科学版, 2016, 37(4): 572-577.

ZHANG Jian， WANG Shu-ying， YANG Jun-sheng， ZHANG Xi-bao. Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum[J]. Journal of Northeastern University Natural Science, 2016, 37(4): 572-577.

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北京地铁敞口式盾构掘进对砂层土体扰动规律研究

Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum

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