Tunnel stability assessment by 3D DDA-key block analysis

Wu Wei; Zhu Hehua; Lin Jeen-Shang; Zhuang Xiaoying; Ma Guowei

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Tunnel stability assessment by 3D DDA-key block analysis

机译：通过3D DDA-关键块分析评估隧道稳定性

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摘要

The key block theory is often the first analysis carried out in assessing potential instability caused by tunneling through jointed rock masses. This study suggests that it is beneficial to include it as the first step for a detailed design analysis by discrete numerical modeling, such as 3D DDA. The procedure is illustrated with an example which is simplified but is general and contains both primary and secondary key blocks. The agreement of the identified key blocks from 3D DDA and the key block theory provides credence for the DDA study, while the DDA, in turn, gives insights on how the failure of the unstable blocks evolves and complements the key block analysis.

机译：关键块理论通常是第一个分析，用于评估通过节理岩体隧洞引起的潜在不稳定性。这项研究表明，最好将它作为通过离散数值建模（例如3D DDA）进行详细设计分析的第一步。用一个示例进行了说明，该示例已简化但很通用，并且包含主键块和辅助键块。从3D DDA中识别出的关键块和关键块理论的一致性为DDA研究提供了可信度，而DDA则提供了有关不稳定块的故障如何演变并补充关键块分析的见解。

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来源
《Tunnelling and underground space technology》 |2018年第1期|210-214|共5页
作者
Wu Wei; Zhu Hehua; Lin Jeen-Shang; Zhuang Xiaoying; Ma Guowei;
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作者单位

Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China|Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai, Peoples R China;

Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China|Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai, Peoples R China;

Univ Pittsburgh, Dept Civil & Environm Engn, Pittsburgh, PA USA;

Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China|Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai, Peoples R China;

Univ Western Australia, Sch Civil & Resource Engn, Perth, WA, Australia;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Fractured rocks; Key block; DDA; Tunnel stability; 3D modeling;

机译：破碎岩石关键块DDA隧道稳定性3D建模;

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Tunnel stability assessment by 3D DDA-key block analysis

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