隧道围岩渐进性破坏机理模型试验方法研究

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摘要研究目的：模型试验是研究隧道工程问题的一个重要手段, 而围岩破坏问题模型试验一直是一个难点。通过本研究, 建立隧道围岩渐进性破坏机理模型试验方法, 为围岩破坏机理的研究提供试验基础。

研究结论：将隧道围岩简化为均匀介质, 以公路隧道Ⅳ、Ⅴ级围岩为研究目标, 以围岩级别、隧道埋深、隧道断面为参量设计了模型试验内容、试验装置, 研制了围岩模型材料, 建立了隧道围岩渐进性破坏机理模型试验方法, 实现了自重应力场作用下毛洞状态时隧道围岩塌方破坏过程的试验模拟, 并结合模型试验结果对隧道围岩渐进性破坏过程及破坏过程中围岩应力、地表位移变化规律进行了分析。

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	汪成兵
	朱合华

关键词 ：隧道塌方, 渐进性破坏, 模型试验

Abstract：Research purposes：Model test is one of the most important methods for studying the problem of tunnel engineering, but the model test concerning the failure problem of the surrounding rock is very difficult. Through the study, the method of model tests on the progressive failure mechanism of the surrounding rock of tunnel is established for the purpose of providing favorable test foundation for studying the failure mechanism of the surrounding rock.

Research conclusions：Setting the surrounding rocks (grades IV,V) of road tunnel as the study objective, the rocks are simplified as homogeneous medium, puts forward the content, device and method of model tests on the progressive failure mechanism of the surrounding rock of tunnel are offered and the model material of the surrounding rock is confected. The rank of surrounding rock, the cross section and buried depth of tunnel are taken as the parameters for the model test. The test simulation of the failure process of the surrounding rock under gravitational stresses and unsupported condition is carried out successfully. Finally the model test results of the progressive failure process of the surrounding rock, the laws of the stress of surrounding rock and their displacement during the collapse are analyzed.

Key words： tunnel collapse progressive failure model test

收稿日期: 2008-11-27

PACS:

U 456

作者简介: 汪成兵, 1979年出生, 男, 工程师;朱合华, 1962年出生, 男, 教授, 博士生导师。

引用本文:

汪成兵，朱合华. 隧道围岩渐进性破坏机理模型试验方法研究[J]. 铁道工程学报, 2009, 26(3): 48-53.
WANG Cheng-bing, ZHU He-hua. Study on the Test Method for Progressive Failure Mechanism of the Surrounding Rock of Tunnel with Model. 铁道工程学报, 2009, 26(3): 48-53.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2009/V26/I3/48

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