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隧道凹凸排水板受压特性试验研究

作者：舒泽波1，郭凯斌1，陈通1，刘杨青1，李洁2，3

关键字：隧道,凹凸,排水,板,受压,特性,试验,研究,

　
（1.江西省交通设计研究院有限责任公司，江西 南昌  330022；
2.江西省地下空间技术开发工程研究中心，江西 南昌  330013；
3.华东交通大学 土木建筑学院，江西 南昌  330013）
    摘要：为探究凹凸排水板在隧道防排水工程中的适用性，采用室内压缩试验研究凹凸排水板在受压过程中的变形特性，得到凹凸排水板受法向压力时的应力-位移曲线。结果表明：试件尺寸与凹凸排水板抗压强度呈弱相关；加载速率与凹凸排水板抗压强度呈负相关；受0.5 MPa压力时凹凸排水板压缩率已达到77%，凹凸排水板排水性将大幅降低；凹凸排水板压缩变形发展可分为缓慢发展阶段、快速发展阶段和材料压密阶段，3个阶段中凹凸排水板的等效刚度分别取为1.4×108、0.3×108、2.1×108 N/m。
    关键词：隧道；凹凸排水板；压缩试验；变形特性；等效刚度
    中图分类号：TU57        文献标识码：A        文章编号：1001-702X（2023）04-0029-06
 
Experimental study on compression characteristics of tunnel concave-convex drainage plate
SHU Zebo1，GUO Kaibin1，CHEN Tong1，LIU Yangqing1，LI Jie2，3
（1.Jiangxi Provincial Transportation Design and Research Institute Co. Ltd.，Nanchang 330022，China；2.Jiangxi Underground Space Technology Development Engineering Research Center，Nanchang 330013，China；3.School of Civil Engineering and Architecture，East China Jiaotong University，Nanchang 330013，China）
    Abstract：In order to investigate the applicability of concave-convex drainage plate in tunnel drainage prevention projects，the deformation characteristics of concave-convex drainage plate during compression were studied by indoor compression test，and the stress-displacement curve of concave-convex drainage plate under normal pressure was obtained. The test results show that：the size of the specimen is weakly correlated with the compressive strength of the concave and convex drainage plate；the loading rate is negatively correlated with the compressive strength of the concave-convex drainage plate. When the pressure is 0.5 MPa，the compression ratio of the concave and convex drainage plate has reached 77%，and the drainage performance of the concave and convex drainage plate will be greatly reduced. The development of compression deformation of concave-convex drainage plate can be divided into three stages：slow development stage，rapid development stage and material compaction stage. The equivalent stiffness per square meter of concave-convex drainage plate in the three stages is taken as 1.4×108，0.3×108 and 2.1×108 N/m，respectively.
    Key words：tunnel，concave convex drainage plate，compression test，deformation characteristics，equivalent stiffness