新型装配式双舱综合管廊力学性能试验

doi:10.13229/j.cnki.jdxbgxb20200818

摘要/Abstract

摘要：

基于“U型套箍销接纵筋连接”技术，提出了一种新型装配式综合管廊。通过足尺模型静力试验，对新型装配式双舱综合管廊的承载能力、变形能力、构件开裂等力学性能进行了系统研究。结果表明：U型套箍销接纵筋连接性能可靠，试验加载到管廊设计荷载为435 kN时，装配式综合管廊结构未出现裂缝；在加载过程中，装配式综合管廊大跨径顶板经历了开裂、刚度退化和极限破坏3个阶段；在荷载标准值作用下，装配式综合管廊裂缝宽度和挠度均没有超过规范限值，满足正常使用极限状态要求；装配式综合管廊极限承载力为荷载设计值的3.71倍，装配式综合管廊的极限承载力满足设计要求，且有较大的安全储备。本文研究成果可为此新型装配方案的综合管廊的实际应用提供技术依据。

关键词: 结构工程, 装配式双舱综合管廊, U型套箍, 足尺模型, 静力试验, 力学性能

Abstract:

Based on the U-shaped hoop pin and longitudinal rib connection technology， a new type of assembled utility tunnel was proposed. Through the static load test of the full-scale model， the mechanical properties of the new assembled double-cabin utility tunnel， such as load-bearing capacity， deformation capacity， and component cracking， were studied systematically. The test results show that the connection performance of the U-shaped hoop pin and longitudinal rib connection is reliable. When the test is loaded to the design load of 435 kN， cracks appear at the end of the assembled utility tunnel. During the loading process， the long-span roof slab of the assembled utility tunnel experiences three stages： cracking， stiffness degradation and ultimate failure. Under the characteristic value of load， the crack width and deflection of the assembled utility tunnel do not exceed the specification limits， which meet the requirements of the normal service limit state. The ultimate bearing capacity of the utility tunnel is 3.71 times of the design value of load. The ultimate bearing capacity meets the design requirements， and there is a large safety reserve. The experimental research results provide a technical basis for the practical application of the utility tunnel of this new assembly scheme.

Key words: Structural Engineering, assembled double-cabin utility tunnel, U-shaped hoop, full-scale model, static test, mechanic property

中图分类号:

TU990.3

匡亚川,宋哲轩,刘胤虎,莫小飞,伏亮明,罗时权. 新型装配式双舱综合管廊力学性能试验[J]. 吉林大学学报(工学版), 2022, 52(3): 596-603.

Ya-chuan KUANG,Zhe-xuan SONG,Yin-hu LIU,Xiao-fei MO,Liang-ming FU,Shi-quan LUO. Experiment on mechanical properties of new type assembled double-cabin utility tunnel[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(3): 596-603.

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