分块预制综合管廊接缝性能研究

Research on the joint performance of block prefabricated comprehensive pipe gallery

目前国内工程中预制综合管廊应用较少,大部分综合管廊都是现浇的。依托成都市蜀龙五期综合管廊工程,开展分块预制管廊接缝力学与防水性能研究。参照和依据目前国内外同类工程的设计情况,经过对比分析,进行了预制拼装综合管廊接头受力性能试验。结果表明:构件轴力对挠度变形的速率存在影响且UHPC梯度混凝土接头抗弯刚度值明显大于C50混凝土接头;通过防水性能试验对选定的构件接缝防水材料实物试件进行了防水能力和装配应力模拟试验验证,证明了管廊接缝防水设计的可靠,能为实际工程提供决策支持,可以为类似的工程提供借鉴。

Currently,prefabricated comprehensive pipe galleries are not widely used in domestic engineering,and most of them are cast-in-place.Based on the Chengdu Shulong Phase V Comprehensive Pipe Corridor Project,it conducts a research on the mechanics and waterproofing performance of prefabricated pipe corridor joints.It is based on the design situation of similar projects both domestically and internationally.Through comparative analysis,the mechanical performance tests of prefabricated composite pipe gallery joints were conducted.The results show that the axial force of the component has an impact on the rate of deflection deformation,and the bending stiffness value of UHPC gradient concrete joints is significantly greater than that of C50 concrete joints.Through waterproof performance tests,the waterproof ability and assembly stress simulation tests were conducted on selected physical samples of component joint waterproof materials,proving the reliability of the waterproof design of pipe gallery joints.It can provide decision-making support for practical projects and provide reference for similar projects.