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隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (S1): 158-165.DOI: 10.3973/j.issn.2096-4498.2019.S1.023

• 研究与探索 • 上一篇    下一篇

偏压荷载对箱型明洞受力影响及设计要点

黎良仆1, 袁松1, *, 魏记承1, 赵鹏2, 廖沛源1   

  1. (1. 四川省交通勘察设计研究院有限公司, 四川 成都 610065; 2. 四川大学建筑与环境学院, 四川 成都 610065)
  • 收稿日期:2019-04-16 出版日期:2019-08-30 发布日期:2019-09-12
  • 作者简介:黎良仆(1990—),男,四川达州人,2016年毕业于四川大学,结构工程专业,硕士,工程师,现主要从事隧道及明棚洞抗冲击能力设计及研究工作。 Email: 412607310@qq.com。
  • 基金资助:

    四川省交通科技项目(2012B4-2,2018-B-03)

Force Influence of Asymmetrical Pressure on Boxtype Shed and Design Points

LI Liangpu1, YUAN Song1, *, WEI Jicheng1, ZHAO Peng1, LIAO Peiyuan1   

  1. (1. Sichuan Communication Surveying & Design Institute, Chengdu 610065, Sichuan, China; 2. College of Architecture and Environment, Sichuan University, Chengdu 610065, Sichuan, China)
  • Received:2019-04-16 Online:2019-08-30 Published:2019-09-12

摘要:

为研究偏压荷载对箱型明洞结构受力影响,为该类明洞结构的设计提供理论依据,以某道路开孔箱型明洞工程为例,采用ANSYS有限元数值模拟方法进行计算分析,综合研究结果表明: 1)偏压回填箱型明洞靠山侧墙底部和外侧墙顶部受力较大,设计配筋时需要加强; 2)靠山侧墙背回填土侧压力对明洞结构受力影响较大,改善回填材料内摩擦角大小可以有效降低明洞结构内力,当内摩擦角增大到47°时最为经济; 3)可以通过在明洞洞顶回填EPE的方式减轻洞顶冲击荷载,降低明洞内力,最优回填厚度为0.9 m。

关键词: 箱型明洞, 力学特性, 侧压力, EPE, 有限元模拟

Abstract:

The study of the force influence of asymmetrical pressure on boxtype shed structure is very important to provide theoretical basis for some similar projects. As a result, a road shed is taken for an example to carry out calculation and analysis by ANSYS finite element numerical simulation method. The results show that: (1) The bearing force on the bottom of the side wall and the top of the outside wall of the boxtype shed with eccentric backfilling is relatively large, which need to be strengthened in the design of reinforcement. (2) The lateral stress of backfilled soil on mountain side has a great influence on the structure of the shed; the structure internal force of the backfill can be improved by grouting to reduce the internal force of the shed; the economic benefits can be the highest when the internal friction angle reaches 47°. (3) The backfill of EPE on top of open tunnel can reduce the load impact on tunnel top and the internal force, and the optimal backfill thickness is 0.9 m.

Key words: boxtype shed, mechanical properties, lateral pressure coefficient, EPE, finite element simulation

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