考虑拼装变形的底部平型橡胶密封垫结构研究  

Consider the Study of Flat Rubber Sealing Gasket Structure at the Bottom of Assembly Deformation

作　　者：刘继国[1,2] 贺创波 张晟斌 舒恒[1,2] 李金 Liu Jiguo;He Chuangbo;Zhang Shengbin;Shu Heng;Li Jin(CCCC Second Highway Consultants Co.Ltd.,Wuhan 430056,P.R China;CCCC Tunnel and Underground Space Engineering Technology Research and Development Center,Wuhan 430056,P.R China;CCCC Second Harbour Engineering Company Ltd.,Wuhan 430040,P.R China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430040,P.R China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]中交集团隧道与地下空间工程技术研发中心,武汉430056 [3]中交第二航务工程局有限公司,武汉430040 [4]交通运输行业交通基础设施智能制造技术研发中心,武汉430040

出　　处：《地下空间与工程学报》2025年第1期207-213,共7页Chinese Journal of Underground Space and Engineering

基　　金：中交集团重大科技研发项目(2022-ZJKJ-10,2022-ZJKJ-08)。

摘　　要：针对三种底部平型橡胶密封垫,通过数值计算和物理模型试验分析密封垫防水及压缩性能,并对拼装过程中密封垫滑动变形情况进行研究,研究表明:(1)断面1中心存在开孔,密封垫拼装时压缩应力减小,压缩后开孔位置无法完全闭合,密封垫防水路径减小,不利于管片接头防水;(2)断面3防水能力比断面2提高30.1%,但断面3复合遇水膨胀橡胶后会增加表面粗糙度,拼装过程易于加剧角部密封垫堆积变形,并且多次试拼可能导致遇水膨胀与三元乙丙脱落分离;(3)密封垫压缩滑动时角部堆积变形过大时易使密封垫间出现较大高差,下一环管片错缝拼装时此处密封垫难以压缩到位,易存在渗流通道出现渗漏。Design three types of bottom flat rubber sealing gaskets,analyze the waterproof and compression performance of the sealing gasket through numerical calculations and physical model tests,and study the sliding deformation of the sealing gasket during the assembly process.Three types of cross-sectional studies show that:1)there is an opening in the center of Section 1,which reduces the compression stress of the sealing gasket.After compression,the opening position cannot be fully closed,and the waterproof path of the sealing gasket is reduced,which is not conducive to the waterproofing of the pipe joint;2)The waterproof capacity of section 3 is 30.1%higher than that of section 2,but the surface roughness of section 3 will be increased after being compounded with water swelling rubber.The assembly process is prone to exacerbating the accumulation and deformation of corner sealing pads,and multiple trial assembly may lead to water swelling and separation of EPDM from EPDM;3)When the seal compresses and slides,the direction of movement is opposite.When the corner accumulation deformation is too large,it is easy to cause a large height difference between the sealing pads.When the next ring segment is assembled in a staggered manner,the sealing pad here is difficult to compress in place,which is prone to leakage in the seepage channel.

关 键 词：橡胶密封垫 复合断面 防水性能 压缩性能 滑动变形 堆积 

分 类 号：U455[建筑科学—桥梁与隧道工程]