| 岩溶隧道衬砌施工缝疏水涂层长期工作性能研究 |
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| 引用本文： | 蒋雅君,陶磊,刘世军,刘世圭,肖华荣.岩溶隧道衬砌施工缝疏水涂层长期工作性能研究[J].中国公路学报,2022,35(4):186-194. |
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| 作者姓名： | 蒋雅君 陶磊 刘世军 刘世圭 肖华荣 |
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| 作者单位： | 1. 西南交通大学 土木工程学院, 成都 610031;2. 成都扬华源动新材料科技有限公司, 成都 610213 |
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| 基金项目： | 成都扬华源动新材料科技有限公司研发项目(2018H010255) |
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| 摘 要： | 岩溶隧道排水系统中普遍存在岩溶水碳酸钙结晶堵塞反复出现的问题,从而引发隧道渗漏水加剧,危及隧道运营安全.在依托工程中,对岩溶地区运营公路隧道衬砌施工缝渗漏水进行了引排水处理,并在排水半管的混凝土基面上施作了疏水涂层以减少结晶的附着,针对该疏水涂层的长期工作性能进行了室内试验和现场监测.选取基面接触角作为表征指标,通过室...
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| 关 键 词： | 隧道工程 岩溶水结晶 试验研究 现场监测 疏水涂层 长期工作性能 |
| 收稿时间： | 2020-10-07 |
Study on Long Term Performance of Hydrophobic Coating for Lining Construction Joints in Karst Tunnels |
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| JIANG Ya-jun,TAO Lei,LIU Shi-jun,LIU Shi-gui,XIAO Hua-rong.Study on Long Term Performance of Hydrophobic Coating for Lining Construction Joints in Karst Tunnels[J].China Journal of Highway and Transport,2022,35(4):186-194. |
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| Authors: | JIANG Ya-jun TAO Lei LIU Shi-jun LIU Shi-gui XIAO Hua-rong |
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| Affiliation: | 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Chengdu Yanghua Yuandong New Materials Science and Technology Co. Ltd., Chengdu 610213, China |
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| Abstract: | The problem of calcium carbonate crystal blocking in karst water is common in the drainage system of karst tunnels, which leads to the aggravation of tunnel leakage and endangers the safety of tunnel operation. In the project practice, drainage treatment was carried out for the leakage of lining construction joints of one operating highway tunnel in karst area, and the hydrophobic coating was applied on the concrete subsurface of drainage half pipe to reduce the adhesion of crystal. The indoor test and field monitoring were carried out for the long-term working performance of the hydrophobic coating. In this paper, the contact angle of the subsurface was selected as the characterization index, and the change of the contact angle of the mortar block coated with the composite hydrophobic coating was measured and analyzed under the three environmental conditions of drying, soaking and water scouring. According to the environmental condition monitoring of the tunnel site, the conditions of water scouring in the water diversion and drainage facilities of construction joints were analyzed, and the annual days of water scouring in the drainage facilities of construction joints were counted. Combined with the results of laboratory test and field monitoring, the long-term performance of the hydrophobic coating was analyzed and discussed. The results show that: the hydrophobic base surface formed by the composite hydrophobic coating alleviated the attachment of calcium carbonate crystal on the concrete surface to a certain extent, and prolonged the working life of the leakage drainage facilities of the tunnel lining construction joint; the long-term performance of the composite hydrophobic coating was mainly affected by the water scouring, and the mechanism might come from the hydrolysis and erosion wear of the surface coating; depending on the climate and hydrological environment of the project, the effective working time of the composite hydrophobic coating was about 2 years. |
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| Keywords: | tunnel engineering karst water crystallization experimental study field monitoring hydrophobic coating long term working performance |
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