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隧道建设（中英文） ›› 2021, Vol. 41 ›› Issue (4): 569-578.DOI: 10.3973/j.issn.2096-4498.2021.04.006

• 研究与探索 • 上一篇    下一篇

公路隧道钢管混凝土拱架承载力评价指标及合理选型研究

张俊儒1， 王智勇1， 任兆丹2， 孔超3, *， 徐向东2， 吴洁4   

  1. （1. 西南交通大学 交通隧道工程教育部重点实验室， 四川 成都 610031； 2. 中铁第四勘察设计院集团有限公司，湖北 武汉 430063； 3. 西南科技大学土木工程与建筑学院， 四川 绵阳 621010； 4. 中国电建昆明勘察设计研究院有限公司， 云南 昆明 650051）

  • 出版日期:2021-04-20 发布日期:2021-04-30
  • 作者简介:张俊儒（1978—），男，山西神池人，2007年毕业于西南交通大学，桥梁与隧道工程专业，博士，副教授，主要从事隧道围岩稳定性和支护理论研究工作。E-mail: jrzh@swjtu.edu.cn。*通信作者： 孔超， E-mail: kongchaokc@foxmail.com。
  • 基金资助:

    高铁联合基金资助项目（U1934213）； 中国铁路总公司科技研究开发计划项目重大课题（2017G006-B）； 中铁第四勘察设计院集团有限公司科研项目（2018K84-1）

Evaluation Indices for Bearing Capacity of Concretefilled Steel Tube Arch in Highway Tunnel and Reasonable Type Selection

ZHANG Junru1, WANG Zhiyong1, REN Zhaodan2, KONG Chao3, *, XU Xiangdong2, WU Jie4   

  1. (1.Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;2.China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China;3.School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;4.PowerChina Kunming Survey and Design Institute Co., Ltd.,  Kunming 650051, Yunnan, China)

  • Online:2021-04-20 Published:2021-04-30

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摘要： 钢管混凝土具有强度高、塑性韧性好等特点，为促进钢管混凝土结构在隧道工程中的应用，针对当前对钢管混凝土拱架承载力评价指标研究不足以及钢管选型难的问题，通过对50种不同直径、壁厚的钢管混凝土拱架承载力的理论计算与数值模拟对比分析，对公路隧道钢管混凝土拱架承载力评价指标及合理选型进行研究。主要结论如下： 1）相比于钢管面积、含钢率、钢管惯性矩，钢管的抗弯截面系数作为综合指标能较好地表征钢管与钢管混凝土拱架承载力之间的关系，建议作为评价钢管混凝土拱架承载力的指标； 2）基于文中的研究依据，拟合钢管抗弯截面系数与钢管混凝土拱架承载力公式，以及钢管混凝土初期支护承载力与钢管混凝土拱架承载力公式； 3）钢管直径比钢管壁厚对钢管混凝土拱架承载力的影响更大，直径大、壁厚小的钢管混凝土拱架不但具有更高的承载力，而且具有更经济的钢材用量； 4）钢管混凝土拱架建议按照增大钢管直径＞增加钢管壁厚＞提高核心混凝土强度等级的优先级进行选型设计。

关键词:

公路隧道, 钢管混凝土拱架, 承载力评价指标, 钢管抗弯截面系数, 钢管选型

Abstract:

The concretefilled steel tube is characterized by high strength and good plastic toughness. Present, the research on the evaluation index of bearing capacity of concretefilled steel tube arch frame is insufficient; thus, selecting steel tube is difficult. To promote the application of concretefilled steel tube structure in tunnel engineering, based on the comparative analysis of the theoretical calculation and numerical simulation of the bearing capacity of 50 concretefilled steel tubular arches with different diameters and wall thicknesses, the evaluation indices and reasonable selection of the concretefilled steel tubular arches for highway tunnels are studied. The results show the following: (1) Compared with the area, steel content and moment of inertia of steel tubes, the flexural section coefficient of steel tubes as a comprehensive index can find the relationship between the bearing capacity of steel tubes and concretefilled steel tubes, and it is used as an index to evaluate the bearing capacity of concretefilled steel tubes. (2) Based on the research results, the formula of flexural section coefficient of the steel tube and the bearing capacity of concretefilled steel tube arch and that of the bearing capacity of the primary support and the concretefilled steel tube arch are fitted. (3) The diameter of the steel tube has a greater effect on the bearing capacity of concretefilled steel tube arches than the thickness of the steel tube. The largediameter and thinwall concretefilled steel tube arches have a higher bearing capacity, and it is economical. (4) It is suggested that the concretefilled steel tube arch is selected based on the following priority order: large diameter, large thickness, and improved core concrete strength.

Key words: highway tunnel, concretefilled steel tube arch, bearing capacity evaluation index, steel pipe bending section coefficient, steel pipe selection

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主办单位：中铁隧道勘察设计研究院有限公司    主管单位：中铁隧道局集团有限公司

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