地下空间预制装配式结构研究现状综述

A Review on the Research of Prefabricated Structures in Underground Space

地下工程中存在的施工复杂、周期长以及经济性有待提升等问题一定程度阻碍了地下空间的蓬勃发展,而预制装配式结构在地下空间领域的应用对地下工程的建设已产生深远影响,为解决这一问题提供了新思路和方法.本文对国内外基坑和地下管廊的预制装配式结构的研究现状进行归纳总结.结果表明,现有的成果中装配式预应力鱼腹梁基坑支护体系具有一定优势,但仍缺乏对复杂工程适用性的验证;新型基坑支护结构填补了部分特殊条件工程应用的空白;对于装配式综合管廊计算模型单一的问题,值得进一步完善,同时缺乏用于分析管廊结构抗震响应,且能够准确表征材料破坏特性的复杂本构模型.

The complex construction,long period and economic improvement of underground projects have hindered the vigorous development of underground space to a certain extent.The application of prefabricated structures in underground space has a profound impact on the construction of underground engineering,providing new ideas and methods to solve this problem.This paper summarizes the research status of prefabricated structures of foundation pits and utility tunnels at home and abroad.The results show that innovative prestressed support system has certain advantages in the existing results,but it still lacks the verification of the applicability of complex projects.New foundation pit supporting structures fill the application of some projects with special conditions;Meanwhile the problem for single calculation model of assembled utility tunnels deserves further solutions,and the complex constitutive models considering the failure behaviors of materials used to analyze the seismic response of utility tunnel structures accurately is lacking.