岩质隧洞支护结构设计计算方法探索

›› 2009, Vol. 30 ›› Issue (S1): 148-154.

岩质隧洞支护结构设计计算方法探索

杨臻¹，郑颖人²，张红¹，王谦源¹，肖安保³

1. 青岛理工大学理学院，青岛 266033；2. 后勤工程学院重庆市地质灾害防治工程技术研究中心，重庆 400041； 3. 中国建筑第五工程局，长沙 410004

收稿日期:2009-05-12 出版日期:2009-08-10 发布日期:2011-03-16
作者简介:杨臻，男，1983年生，硕士，主要从事地下隧洞的稳定性研究。
基金资助:
青岛市科技计划项目（No.08-1-3-48-jch）。

Explorating computational method of designing the supporting structure of rock tunnel

YANG Zhen¹, ZHENG Ying-ren², ZHANG Hong¹, WANG Qian-yuan¹, XIAO An-bao³

1. School of Sciences, Qingdao Technological University, Qingdao 266033, China; 2. Chongqing Geological Hazard Control Engineering Technology Research Center, Logistical Engineering University of PLA, Chongqing 400041, China; 3. China Construction Fifth Engineering Bureau, Changsha 410004, China

Received:2009-05-12 Online:2009-08-10 Published:2011-03-16

摘要/Abstract

摘要：

依靠模型试验与力学计算，分析了隧洞破坏机制与型式，提出将基于有限元强度折减法求出的围岩安全系数作为稳定分析判据。现有各种围岩分类中都有一些标志围岩稳定性的标志性说明，在前人基础上，提出了各级岩体的稳定性标志，尤其提出了一种新的定量标志，即将隧洞在无衬砌情况下的围岩安全系数作为隧洞稳定性定量标志。由此，在给出的相应稳定安全系数基础上反算出各级岩体的强度参数，以提高强度参数的准确性。提出了岩质隧洞的设计计算方法，采用有限元强度折减法计算围岩安全系数，采用有限元法计算衬砌安全系数，并对青岛市某地下工程进行数值模拟，分别计算了围岩和衬砌的安全系数。初步建议岩体隧洞的设计标准：初期支护后，围岩安全系数不小于1.15～1.2，初衬的安全系数不小于1.3；二次支护后围岩安全系数高于1.25，衬砌的安全系数大于2.0～2.4，以确保隧洞在施工和运行过程中的安全。

关键词: 隧洞, 围岩稳定性, 强度参数, 安全系数, 衬砌支护结构, 初期支护, 二次支护

Abstract:

Based on model tests and mechanical calculation, destruction mechanisms and forms of tunnel are analyzed. Taking safety factors calculated by strength reduction finite element method as the stability criterion is put forward. The stability marks of all kinds of rock masses are put forward in all kinds of surrounding rock classifications. Based on the above, the stability marks of all kinds of rock masses, especially one kind of new quantitative symbol, which is using safety factors of rock masses in non-lined situation as quantitative symbol is proposed. Based on the given corresponding safety factors, the strength parameters of rock masses for improving the accuracy of the strength parameters are deduced. The computational methods of designing rock tunnel, calculating safety factor of rock masses and lining work by strength reduction FEM and FEM respectively are proposed. In addition, the numerical calculation to one Qingdao underground work is carried on, and the safety factors of rock masses and lining work are calculated respectively. The initial standards of designing rock tunnel is that after initial lining, the safety factor of the rock masses is not less than 1.15 to 1.2, and the safety factor of initial lining is not less than 1.3; the safety factor of the rock masses is greater than 1.25 and the safty factor of lining is greater than 2.0 to 2.4 after the second lining, which ensure the tunnel security during construction and operation

Key words: tunnel, stability of surrounding rock, strength parameter, safety factor, lining support structure, initial lining, secondary lining

中图分类号:

TU 354

杨臻，郑颖人，张红，王谦源，肖安保. 岩质隧洞支护结构设计计算方法探索[J]. , 2009, 30(S1): 148-154.

YANG Zhen, ZHENG Ying-ren, ZHANG Hong, WANG Qian-yuan, XIAO An-bao. Explorating computational method of designing the supporting structure of rock tunnel[J]. , 2009, 30(S1): 148-154.

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