隧道掌子面防突水安全厚度的区间非概率可靠性分析方法

发布时间：2018-01-12 22:20

本文关键词：隧道掌子面防突水安全厚度的区间非概率可靠性分析方法　出处：《水文地质工程地质》2016年06期 　论文类型：期刊论文

【摘要】：本文对剪切破坏模式下的隧道掌子面防岩溶突水安全厚度进行了研究。首先对不同初始地应力场类别下的地应力特征进行分析,从而为隧道掌子面岩墙抗剪切破坏时剪切面上法向应力的确定方法提供客观合理的依据。隧道开挖会造成围岩应力的重分布,隧道开挖前后的围岩应力状态存在明显不同,本文基于这一特征建立了掌子面岩溶突水剪切破坏模式下的剪切面法向应力计算方法。然后针对工程中相关参数具有的区间不确定性特征,引入区间非概率可靠性分析方法,从而最终建立隧道掌子面岩墙防岩溶突水的安全厚度区间非概率计算方法。最后,通过本文方法计算结果与实际工程结果的对比分析表明了本文方法的适用性和合理性。
[Abstract]:In this paper, the safety thickness of karst water inrush on tunnel face under shear failure mode is studied. Firstly, the characteristics of in-situ stress under different initial geostress fields are analyzed. It provides an objective and reasonable basis for determining the normal stress on the shear plane during shear failure of tunnel face rock wall. The excavation of tunnel will result in the redistribution of surrounding rock stress. The stress state of surrounding rock before and after excavation is obviously different. Based on this characteristic, this paper establishes the normal stress calculation method of the shear plane under the shear failure mode of karst water inrush on the palm face, and then according to the interval uncertainty characteristic of the relevant parameters in the engineering. The interval non-probabilistic reliability analysis method is introduced to establish the interval non-probabilistic calculation method of the safety thickness of tunnel face rock wall against karst water inrush. Finally. The applicability and reasonableness of the proposed method are proved by comparing the calculated results with the actual engineering results.
【作者单位】：衢州学院建筑工程学院;湖南大学岩土工程研究所;中机国际工程设计研究院有限责任公司;
【基金】：浙江省教育厅项目资助(Y201533974)
【分类号】：U452.11
【正文快照】： 岩溶在我国分布非常广泛,遍布多个省市,尤其是西南地区岩溶发育在我国最为突出,正是由于岩溶广泛的存在,使得这些地区在修建隧道时常常发生危害性很大的突水灾害,严重威胁人们的财产和生命安全[1~4]。因此,为保证岩溶区隧道建设的顺利进行,对岩溶区隧道突水机理以及防岩溶突水

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