北疆高寒区某大型干渠伸缩缝止水材料修补工程研究

Mending Option on Waterstop Materials for the Expansion Joints in a Large Main Canal in Alpine Area of Northern Xinjiang

针对北疆高寒区某大型干渠衬砌伸缩缝修补的生产需求,首先探明了渠道结构缝漏水的原因;其次通过对以往修补工作结果的考察并结合现场试验,进行了止水材料的经济技术比选;再次通过室内试验讨论了低温、潮湿以及缝面不洁等特殊施工环境下对聚氨酯密封胶工作性能的影响;最后综合以上成果,确定了相适宜的施工工艺。实践证明,采用推荐方案工程应用良好,可为类似条件下的工程建设提供借鉴和参考。

According to the production demand of the expansion joint repair in a large main canal in alpine area of northern Xinjiang,the following work steps had been performed.First of all,the leakage causes of canal expansion joint were found out.Secondly,on the basis of field test and engineering experience,an eco-technical comparison of waterstop materials was carried out.The working properties of the polyurethane sealant were studied under special construction environment,such as low temperature,humidity and unclean of the joint surface.Finally,the construction technology appropriate to the actual situations was identified.A mending option was successfully applied in practice,which provides a good reference for other projects in similar construction environment.