基于综合管廊功能极限状态的接口转角限值研究  

STUDY ON JOINT ROTATION LIMITS OF UTILITY TUNNELS BASED ON FUNCTIONAL LIMIT STATES

作　　者：钟紫蓝 王晓静 杜修力[1] 胡正一 李立云[1] ZHONG Zi-lan;WANG Xiao-jing;DU Xiu-li;HU Zheng-yi;LI Li-yun(College of Architectural Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《工程力学》2021年第11期33-42,65,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(51978020,51421005);国家重点研发计划项目(2018YFC1504305);广东省地震工程与应用技术重点实验室开放基金项目(2017B030314068)。

摘　　要：针对地下综合管廊受邻近工程施工扰动时的功能完整性问题,基于管廊接口附近节段发生刚体转动假定,针对典型综合管廊接口止水失效模式建立了管廊接口转角与细部尺寸的几何关系式,初步探究不同横截面尺寸管廊在正常使用极限状态下接口止水失效所对应的管廊接口转角限值。以廊内管线极限拉伸和压缩应变量为依据,给出管廊内不同直径的管线达到承载能力极限状态时所对应的管廊转角限值。分析结果表明:管廊接口止水失效对应的转角限值与接口密封形式及管廊横截面几何尺寸有关;廊内管线破坏时的管廊接口转角限值主要受管廊横截面宽度和管线直径影响;当管廊横截面宽度小于10 m、廊内管线直径小于公称直径DN500时,管廊接口止水失效对管廊功能完整性能起控制作用;当管廊截面宽度大于10 m且内部管线直径大于DN500管径,廊内管线破坏先于管廊接口止水失效。综合考虑管廊接口止水失效和廊内管线破坏两种失效模式所给出的管廊接口转角限值,可为管廊接口防水及结构安全设计提供参考。Aiming at the problem of functional integrity of underground utility tunnel disturbed by adjacent engineering construction,Based on the assumption that rigid body rotation occurs in the section near the joint of a utility tunnel,the geometric relationship is established between the rotation of the utility tunnel joint and the detail geometries of the utility tunnel considering the water-proof failure at the joint,and the joint rotation limits is preliminarily investigated for the utility tunnels with different cross-sectional geometries corresponding to the water-proof failure.Based on the ultimate tensile and compressive strain of the internal pipelines of a underground utility tunnel,the joint rotation limits are also presented for the utility tunnel corresponding to the failure of internal pipelines with different diameters.The analysis results show that:the joint rotation limit corresponding to the water-proof failure of the utility tunnel is closely related to the configuration of the water proof material at the joint and the cross-sectional geometries of the utility tunnel;the water-proof failure of the utility tunnel joint plays a critical rule to the functional integrity of the utility tunnel when the width of the utility tunnel is less than 10 m and when the pipeline is smaller than the nominal diameter of DN500.Otherwise,when the width of the utility tunnel is more than 10 m and the pipeline is larger than DN500,the failure of internal pipelines occurs before the water-proof failure of the utility tunnel joint.Considering the two failure modes of water-proof failure and internal pipelines failure in the utility tunnel,the limited value of the joint rotation can provides a technical reference for the functional integrity and safety design of the utility tunnels.

关 键 词：综合管廊 转角限值 接口止水失效 管线破坏 结构安全性 

分 类 号：TU99[建筑科学—市政工程]