基于遗传算法的隧道围岩变形稳定可靠性分析

祁长青; 许人平; 吴继敏

基于遗传算法的隧道围岩变形稳定可靠性分析

1.
河海大学科学研究院南京 210098;
2.
诸永高速公路温州段工程建设指挥部永嘉 325100;
3.
南京水利科学研究院岩土工程研究所南京 210024

详细信息

作者简介:
祁长青,主要从事地质工程稳定性和数值模拟方面的研究.

中图分类号: V457.1
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- 被引次数: 0
出版历程
- 收稿日期: 2007-08-13
- 修回日期: 2007-12-03
- 刊出日期: 2008-04-30

RELIABILITY ANALYSIS OF ROCK MASS DEFORMATION IN TUNNEL EXCAVATION BASED ON GENETIC ALGORITHM

1.
Research academy of Hohai University, Nanjing 210098;
2.
Engineering Construction Headquarters of Wenzhou Section of Zhuyong Highway,Yongjia 325100;
3.
Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210024

摘要

摘要: 由于隧道的开挖,隧道围岩的初始应力状态将发生变化,围岩发生卸荷变形,并可能导致隧道的失稳。为了研究隧道开挖后围岩变形的可靠性,建立了隧道围岩变形可靠度指标计算模型,并用遗传算法进行求解。应用本文方法对一高速公路隧道围岩变形的可靠性进行分析。从结果可以看出,围岩的潜在破坏区域出现在拱顶和两侧拱肩区域,从这些区域的可靠度指标和破坏概率值可以看出,该隧道毛洞的拱顶下沉和拱肩收敛可靠度都满足不了规范的要求,要及时进行支护。
- 可靠性分析 /
- 隧道围岩 /
- 遗传算法 /
- 可靠度指标 /
- 破坏概率
Abstract: The initial stress state and stability of the surrounding rock mass will change during tunnel excavation. The rock mass even may collapse due to over-size displacement. A new method is presented in this paper for reliability analysis of tunnel excavation. The genetic algorithm is put forward to calculate the reliability index and failure probability for the complexity of the model. The proposed method is applied to reliability analyzing of a practical expressway tunnel. The result shows that the potential break areas appear at vault and spandrel of the tunnel. The reliability indexes and failure probabilities of the vault settlement and spandrel convergent reflect that the reliability of the unsupported construction can't meet the requirement of the specification. The tunnel must be supported in time.
- Reliability analysis /
- Surrounding rock mass /
- Genetic algorithm /
- Reliability index /
- Failure probability

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参考文献(1)

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