高压水工隧洞透水衬砌设计与优化方法
发布时间：2019-05-21 14:44
【摘要】：基于隧洞透水衬砌设计方法,探讨隧洞运行期衬砌最大裂缝宽度和等效渗透系数的演化规律。分析衬砌配筋率、衬砌厚度和围岩渗透特性对衬砌安全性的影响,借助多元统计逐步回归的方法提出透水衬砌的设计优化方法。计算结果表明:高压隧洞在运行期衬砌围岩脱离之前,衬砌最大裂缝宽度和等效渗透系数随内水压力增大的增幅较快,而在脱离后增幅明显减小;衬砌最大裂缝宽度与配筋率成反比,与围岩渗透系数的对数值成正比;在衬砌限裂的优化设计过程中,建议以降低围岩的渗透特性为先导,提高围岩的综合抗渗能力,其次提高衬砌配筋率减小最大裂缝宽度,而增加衬砌厚度作为优化设计的辅助手段;衬砌配筋率的绝对值每提高0.1%,衬砌最大裂缝宽度减小约0.02 mm;围岩渗透系数每降低10倍,衬砌最大裂缝宽度减小约0.10 mm。
[Abstract]:Based on the design method of tunnel permeable lining, the evolution law of maximum crack width and equivalent permeability coefficient of tunnel lining during operation is discussed. The influence of lining reinforcement ratio, lining thickness and seepage characteristics of surrounding rock on lining safety is analyzed, and the design optimization method of permeable lining is put forward by means of multivariate statistical stepwise regression method. The calculation results show that the maximum crack width and equivalent permeability coefficient of high pressure tunnel increase rapidly with the increase of internal water pressure, but decrease obviously after separation before the surrounding rock of high pressure tunnel is separated from the surrounding rock during operation. The maximum crack width of the lining is inversely proportional to the reinforcement ratio and proportional to the logarithmic value of the permeability coefficient of the surrounding rock. In the process of optimal design of lining crack limitation, it is suggested that the comprehensive impermeability of surrounding rock should be improved by reducing the seepage characteristics of surrounding rock, and secondly, the reinforcement ratio of lining should be increased to reduce the maximum crack width. Increasing the thickness of lining is used as an auxiliary means to optimize the design. When the absolute value of lining reinforcement ratio is increased by 0.1%, the maximum crack width of lining decreases by about 0.02 mm;, and the permeability coefficient of surrounding rock decreases by 10 times, and the maximum crack width of lining decreases by about 0.10 mm..
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;武汉地铁集团有限公司;
【基金】：国家自然科学基金资助项目(51179140,51579194)~~
【分类号】：TV554
[Abstract]:Based on the design method of tunnel permeable lining, the evolution law of maximum crack width and equivalent permeability coefficient of tunnel lining during operation is discussed. The influence of lining reinforcement ratio, lining thickness and seepage characteristics of surrounding rock on lining safety is analyzed, and the design optimization method of permeable lining is put forward by means of multivariate statistical stepwise regression method. The calculation results show that the maximum crack width and equivalent permeability coefficient of high pressure tunnel increase rapidly with the increase of internal water pressure, but decrease obviously after separation before the surrounding rock of high pressure tunnel is separated from the surrounding rock during operation. The maximum crack width of the lining is inversely proportional to the reinforcement ratio and proportional to the logarithmic value of the permeability coefficient of the surrounding rock. In the process of optimal design of lining crack limitation, it is suggested that the comprehensive impermeability of surrounding rock should be improved by reducing the seepage characteristics of surrounding rock, and secondly, the reinforcement ratio of lining should be increased to reduce the maximum crack width. Increasing the thickness of lining is used as an auxiliary means to optimize the design. When the absolute value of lining reinforcement ratio is increased by 0.1%, the maximum crack width of lining decreases by about 0.02 mm;, and the permeability coefficient of surrounding rock decreases by 10 times, and the maximum crack width of lining decreases by about 0.10 mm..
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;武汉地铁集团有限公司;
【基金】：国家自然科学基金资助项目(51179140,51579194)~~
【分类号】：TV554
【相似文献】
相关期刊论文 前10条
1 张志杰;水工隧洞封堵体设计与施工[J];湖南水利水电;2004年03期
2 刘贵书,刘咏梅;水工隧洞定向开挖点的测算方法[J];湖北水力发电;2004年02期
3 邱发起;;水工隧洞渗漏的综合治理[J];铁道建筑;2006年02期
4 吴海朋;;水工隧洞施工如何进行索赔[J];山西建筑;2008年10期
5 李先武;;关于水工隧洞混凝土施工的探讨[J];山西建筑;2008年13期
6 汪银宝;;水工隧洞混凝土施工质量控制措施分析[J];中国新技术新产品;2009年20期
7 赵亚永;安玉锁;赵旭;;基于水工隧洞安全的若干思考[J];河南科技;2012年23期
8 阿·恩·阿达莫维奇 ,德·伏·阔勒东诺夫 ,张爱珍 ,聂振伟;水工隧洞的灌浆[J];水力发电;1954年04期
9 潘家，
本文编号：2482171
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2482171.html
