隧道排水系统工作能力对衬砌水压力的影响探讨  

Discussion on Influence of Working Capacity of Drainage System on Water Pressure Acting on Tunnel Lining

作　　者：蒋雅君[1,2] 李彬[1,2] 杨其新[1,2] 赵菊梅[2] 李国庆 JIANG Yajun;LI Bin;YANG Qixin;ZHAO Jumei;LI Guoqing(Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《铁道学报》2020年第12期179-185,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(51108385)。

摘　　要：隧道衬砌水压力荷载的计算和分析中,隧道衬砌的渗透系数(隧道的排水能力)是一个重要指标。目前对于该指标的取值,往往基于经验或者假设,影响了相关分析结果的适用性。分析隧道衬砌水压力的计算理论和方法,并对隧道排水系统的工作性能及相关指标的测试方法进行讨论。建立隧道排水体系的串联模型,指出隧道排水系统的排水能力应取决于系统中最小排水能力部件的渗透系数。隧道排水体系中的每个部件应按照对应的测试方法和标准展开排水能力的试验或测试工作,以确定隧道排水体系的整体排水能力。通过对塑料排水板的通水量试验,验证了排水能力与入渗水量之间的关系对衬砌水压的影响。试验结果表明排水系统应有一个工作最优的平衡点,同时试验结果发现隧道排水系统的性能指标应是动态变化的值。The permeability coefficient,i.e.the drainage capacity of the tunnel drainage facility,is an important factor for the analysis and calculation of the water pressure acting on the tunnel lining.Currently,the value of this coefficient is often decided upon hypothesis or experiences,which limits the applicability of related research results.In this paper,the theory and methods for the calculation of water pressure acting on tunnel lining were analyzed and the working performance of the tunnel drainage system and the testing methods for relevant parameters were discussed.The serial model of the tunnel drainage system was established.It was pointed out that the capacity of the drainage system will be decided by the permeability coefficient of the components of the minimum drainage capacity.Hence,the drainage capacity of every component in the tunnel drainage system should be tested according to corresponding test methods and standards,to determine the overall drainage capacity of the tunnel drainage system.The permeability tests for plastic drainage board were conducted to verify the influence of the relationship between the drainage capacity and the seepage on the water pressure acting on the linings.The test results reveal that there will be an optimal balance point for the working performance of the tunnel drainage system,and some parameters of the drainage capacity show dynamic characteristics during the test.

关 键 词：隧道衬砌水压力 排水系统 塑料排水板 水力参数 

分 类 号：TU575[建筑科学—建筑技术科学]