我国公路隧道改扩建技术发展现状及研究展望  

Development Status and Prospect of Highway Tunnel Rehabilitation and Expansion in China

作　　者：张在晨 林从谋[2] 李家盛 董艺[1] 沈雅雯 ZHANG Zaichen;LIN Congmou;LI Jiasheng;DONG Yi;SHEN Yawen(China Construction Fourth Engineering Division Corp.,Ltd.,Guangzhou 510665,Guangdong,China;Fujian Engineering Technology Research Center for Tunnel and Underground Space,Huaqiao University,Xiamen 361021,Fujian,China)

机构地区：[1]中国建筑第四工程局有限公司,广东广州510665 [2]华侨大学福建省隧道与城市地下空间工程技术研究中心,福建厦门361021

出　　处：《隧道建设（中英文）》2022年第4期570-585,共16页Tunnel Construction

基　　金：国家自然科学青年基金(51109084)。

摘　　要：通过分析近20年来国内隧道改扩建的发展历程,梳理增建隧道、原位扩建隧道、组合扩建隧道及改建隧道等不同型式的案例,归纳隧道改扩建型式、施工工法、施工力学响应、支护参数设计与优化、安全控制等研究热点的进展,并指出存在的不足。具体如下:1)在改扩建型式研究上,不同工程的选型指标差异大,缺乏指导性标准;2)在施工工法研究上,设计多偏于保守,如何利用既有隧道衬砌并实现高效施工,亟待系统研究;3)在施工力学响应及支护参数的研究上,不同工程的现场监测、解析求解、数值模拟结果存在较大差异,且缺乏对复杂动态加卸载条件下围岩变形、应力及塑性区演变规律的研究,需结合更多的工程实践总结出特点及规律,并建立支护参数优化分析体系;4)在施工安全控制研究上,主要从减轻爆破振动、优化支护布置、软弱围岩局部加固及施工辅助措施方面考虑,并制定风险源评价的定量指标体系。最后,展望隧道改扩建工程标准化设计、信息化管理、绿色施工及快速建造的发展方向。In this study,the development history of tunnel rehabilitation and expansion in China over the last 20 years is investigated.Furthermore,the cases of additional tunnels,in-situ expansion tunnels,combined expansion tunnels,and rehabilitated tunnels are summarized,and the development status of the research magnets,including rehabilitation and expansion modes,construction methods,construction mechanical responses,support parameters design and optimization as well as safety control of tunnels are examined,and their corresponding shortcomings are proposed.The specifications are as follows:first,the evaluation indices of various projects differ in terms of rehabilitation and expansion modes,and there is no standard guideline.Second,the design is more conservative in terms of construction methods,and it is critical to research how to realize efficient construction based on the existing tunnel lining.Third,in terms of the construction mechanical responses and support parameters,the field monitoring,calculation,and numerical simulation results of several projects vary,and there is no study on the development laws of surrounding rocks′deformation,stress,and plastic zone under complex dynamic loading condition,which shows that more project applications should be studied,and an analysis system should be established for support parameters optimization.Fourth,in terms of the construction safety control,considerations should be made for blasting vibration reduction,support layout optimization,local reinforcement of weak surrounding rock,and construction auxiliary measures as well as the development of a quantitative index system for evaluating risk sources.Finally,the tunnel rehabilitation and expansion project′s development directions of standardized design,information management,green construction,and rapid construction are prospected.

关 键 词：公路隧道 隧道改扩建 施工工法 安全控制 支护参数 

分 类 号：U457.6[建筑科学—桥梁与隧道工程]