砂土地层盾构开挖面极限最小支护压力

doi:10.12068/j.issn.1005-3026.2015.03.029

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (3): 433-436.DOI: 10.12068/j.issn.1005-3026.2015.03.029

砂土地层盾构开挖面极限最小支护压力

刘宇¹ ，唐春安² ，谢欣¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819; 2. 大连理工大学土木水利学院，辽宁大连116024)

收稿日期:2013-09-25 修回日期:2013-09-25 出版日期:2015-03-15 发布日期:2014-11-07
通讯作者: 刘宇
作者简介:刘宇(1987-)，男，辽宁本溪人，东北大学博士研究生；唐春安( 1958- )，男，湖南黔阳人，大连理工大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目( 51179031，51074042 ).

Minimum Supporting Pressure of Shield Tunnel Face in Sandy Grand

LIU Yu¹， TANG Chun-an²， XIE Xin¹

1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China; 2. School of Hydraulic Engineering， Dalian University of Technology， Dalian 116024， China.

Received:2013-09-25 Revised:2013-09-25 Online:2015-03-15 Published:2014-11-07
Contact: LIU Yu
About author:-
Supported by:
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摘要/Abstract

摘要： 盾构施工过程中开挖面支护压力控制不当有可能导致周边管线破裂、建筑物倾斜等严重的风险事故.基于Flac^3D数值模型及极限平衡模型研究了砂土地层中不同埋深比(C/D)及土层内摩擦角对开挖面失稳模式和极限最小支护压力的影响机制.通过对比分析两种方法，得出现有极限平衡模型由于无法反映开挖面失稳过程中侧压力系数随开挖面位移和埋深动态变化过程，因而与实际极限支护压力存在较大差异.该研究为砂土地层工程实践提供重要的理论依据.

关键词: 开挖面稳定性, 埋深比, 极限支护压力, Flac^3D, 极限平衡理论

Abstract: In the procedure of shield construction， the inappropriate controlling of support pressure on the tunnel face may cause risk of accident， such as the nearby pipeline rupture and the incline of existing buildings. The influence of different buried depth ratio (C/D)， internal friction angle on the instability mode of excavation face and the limit minimum support pressure was investigated on the basis of the Flac^3D numerical model and limit equilibrium model. According to the comparison between the two different analysis methods， there is obvious difference between the support pressure predicted by the limit equilibrium model and the actual support pressure， which is caused by the fact that the limit equilibrium model cannot reflect the procedure that the coefficient of lateral pressure changes with the displacement of tunnel face and dynamic depth change. The research may provide great theoretical evidence to the engineering practice in the solid stratum.

Key words: tunnel face stability, buried depth ratio, limit support pressure, Flac^3D, limit equilibrium method

中图分类号:

TU 473

刘宇，唐春安，谢欣. 砂土地层盾构开挖面极限最小支护压力[J]. 东北大学学报:自然科学版, 2015, 36(3): 433-436.

LIU Yu， TANG Chun-an， XIE Xin. Minimum Supporting Pressure of Shield Tunnel Face in Sandy Grand[J]. Journal of Northeastern University Natural Science, 2015, 36(3): 433-436.

参考文献

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砂土地层盾构开挖面极限最小支护压力

Minimum Supporting Pressure of Shield Tunnel Face in Sandy Grand

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