摘要
建设韧性城市和韧性社会是现代城市、社会安全与可持续发展的重大需求。由于岩土介质材料和外荷载的不确定性、岩土与地下工程结构脆弱性及土-地下水-结构物相互作用复杂性,大量岩土与地下工程结构属于低韧性结构,国内外深基坑、盾构隧道、桩基、路堤等工程出现大范围破损甚至连续垮塌的事故时有发生,且事故后难以恢复,但其连续破坏机理及韧性设计方法却缺乏研究。工程韧性提升的目的是保障工程的高可靠性、低灾害后果性和灾后快速恢复性。建立岩土与地下工程韧性安全评价与控制理论体系,提高单体地下工程、相关联的地下工程系统和城市大尺度上的岩土与地下工程的韧性,提升其对灾害或意外事件的抵御、适应和恢复能力,对于我国建设韧性城市、保障建设工程安全具有重要意义。文章梳理了韧性理念与评价方法发展现状,在此基础上从是否考虑失效概率、是否考虑意外情况下的防连续破坏能力、是否考虑意外灾害后的恢复能力角度,将保障工程系统韧性的现有设计方法分为四个层次:即单一安全系数设计、可靠度设计、鲁棒性设计(防连续破坏韧性设计)和可恢复性设计,并逐一对其在岩土与地下工程领域的研究进展进行总结和分析。在此基础上,针对岩土与地下工程连续垮塌问题,重点以基坑工程、盾构隧道工程和复合地基工程为例介绍和讨论了防连续破坏韧性研究进展,以期为建立系统的岩土与地下工程韧性设计理论与框架提供参考。
Resilient cities and societies are significantly required for modern cities,social security,and sustainable development.However,lots of structures in geotechnical and underground engineering are of low resilience due to the uncertainties of soil properties and the surcharges,and the complex interaction between soil-water-structures.The damage accidents or even progressive collapse accidents happened from time to time in deep excavation,shield tunnel,pile foundation,and embankment projects all over the world which are difficult to recover.The purpose of improving project resilience is to ensure high reliability,low disaster consequences and rapid recovery after disasters.It is of great importance to build the evaluation and controlling design theories of resilience against progressive failure,improve the resilience of structural units,systems,and the associated large-scale urban in geotechnical and underground engineering,improve their disaster resistance to disasters or accidents,adaptation and recovery capacity,ensure the safety of construction projects for the development of resilient cities.The research about theory of resilience and evaluation method is reviewed.Based on the concept of whether considering failure probability,whether considering the ability to prevent progressive collapse under unforeseen events and whether considering the ability to recover from disasters,the design method of improving engineering resilience is classified into four levels,which are the design of safety factor,reliability,robustness(preventing progressive collapse)and recoverability.The recent research studies on each of theselevels in geotechnical and underground engineering structures are reviewed,summarized,and analyzed.The progressive collapse in the deep excavation engineering,underground engineering,shield tunnels,and column-supported embankment engineering are taken as examples to discuss the existing research studies on the resilience against the progressive collapse to provide references for establishing design theori
作者
郑刚
程雪松
周海祚
张天奇
于晓旋
刁钰
王若展
衣凡
张文彬
郭伟
Zheng Gang;Cheng Xuesong;Zhou Haizuo;Zhang Tianqi;Yu Xiaoxuan;Diao Yu;Wang Ruozhan;Yi Fan;Zhang Wenbin;Guo Wei(Key Laboratory of Coast Civil Structure Safety of the Ministry of Education,Tianjin University,Tianjin 300350,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2022年第7期1-38,共38页
China Civil Engineering Journal
基金
国家自然科学基金重点项目(41630641)。
关键词
岩土与地下工程
基坑工程
盾构隧道
韧性
连续破坏
可靠度
鲁棒性
可恢复性
geotechnical and underground engineering
excavation engineering
shield tunnel
resilience
progressive collapse
reliability
robustness
recoverability
