填埋场扩建后下穿隧道结构的安全性

doi:10.19952/j.cnki.2096-5052.2023.01.06

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摘要以我国东南某公路隧道上覆填埋场扩容为例,研究新增上覆荷载对下穿隧道结构安全性的影响。通过试验获得渗滤液水位高度及上覆垃圾物理力学参数,建立不同危险隧道断面的有限元模型,分析下穿隧道的结构变形及内力变化,验算其拱顶沉降、承载力及裂缝;提出后续再次扩容时各隧道标段上覆垃圾厚度的上限。结果表明:填埋场扩容后,实际渗滤液水位高度和上覆垃圾物理力学参数对下穿隧道结构影响最为显著;在设计范围内,隧道上覆垃圾堆体厚度对隧道拱顶沉降和承载力影响不显著,隧道结构裂缝通常起到控制作用。

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	黄兴
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关键词: 填埋场下穿隧道垃圾堆体数值模拟结构变形及内力

Abstract: There were many conflicts with existing traffic lines in the process of expansion. Taking the overburden capacity expansion of a highway tunnel in southeast China as an example, the influence of the newly increased overburden load on the safety of underpass tunnel structure was studied. The leachate level height and the physical and mechanical parameters of the overlying waste were obtained through experiments. The finite element models of different dangerous tunnel sections were established to analyze the structural deformation and internal force changes of the tunnel, and the vault settlement, bearing capacity and cracks were checked. The upper limit of the thickness of the overlying waste on each tunnel section during the subsequent expansion of the landfill was proposed. The results showed that the actual leachate level and the physical and mechanical parameters of the overlying waste had the most significant effects on the tunnel structure after the landfill expansion. Within the design range, the influence of the thickness of the overlying waste on the settlement and bearing capacity of the tunnel vault was not significant, and the cracks of the tunnel structure usually played a controlling role.

Key words: tunnel underpass landfill municipal solid waste numerical simulation deformation and internal force

收稿日期: 2022-12-07 修回日期: 2023-03-07 发布日期: 2023-03-20

中图分类号:

U452.27

基金资助: 上海市科委软科学资助项目(22692194400);无锡城市环境科技有限公司科研课题资助项目(KY201803)

通讯作者: 张晓磊(1987— ),男,江苏盐城人,博士,副教授,硕士生导师,主要研究方向为岩土工程、地下工程等. E-mail: Xiaolei_Zhang@tongji.edu.cn

作者简介: 黄兴(1978— ),男,江苏无锡人,硕士,高级工程师,主要研究方向为工程和项目管理、环境岩土工程等. E-mail:506720802@qq.com

引用本文:

黄兴, 张炜, 殷建钢, 施皓, 张晓磊. 填埋场扩建后下穿隧道结构的安全性[J]. 隧道与地下工程灾害防治, 2023, 5(1): 55-63.
HUANG Xing, ZHANG Wei, YIN Jiangang, SHI Hao, ZHANG Xiaolei. The structural safety of the underpass tunnel after the expansion of landfill. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(1): 55-63.

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http://tunnel.sdujournals.com/CN/Y2023/V5/I1/55

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