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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第5期    总第273期    2017年5月

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文章编号:1672-7207(2017)05-1316-10
薄壁钢管混凝土拱架在隧道支护中的受力特性
侯和涛1,马素1,王琦2,金延俊3,朱文灿1,陈磊1

(1. 山东大学 土建与水利学院,山东 济南,250061;
2. 山东大学 岩土与结构工程中心,山东 济南,250061;
3. 绵阳职业技术学院 建筑工程系,四川 绵阳,621000
)

摘 要: 结合济南某电缆隧道工程实例,设计5榀薄壁钢管混凝土拱架与1榀格栅钢架。试验探讨钢管壁厚、钢管拼接节点形式、有无混凝土填充对薄壁钢管混凝土拱架力学性能的影响,并与传统的格栅钢架进行比较。研究结果表明:在较短时间内,薄壁钢管混凝土拱架即能使围岩达到稳定,其抗变形能力要优于传统的格栅钢架;与普通套管相比,采用新型插入式灌浆节点连接的支架具有较强的抗变形能力;拱顶、节点以及柱脚位置应变的绝对值较大。采用有限元程序ABAQUS对试件进行分析,计算结果与试验结果吻合良好,计算模型及参数选取合理,可应用于类似工程。

 

关键词: 薄壁钢管混凝土;隧道支护;灌浆套管;有限元分析

Experimental study on mechanical behavior of concrete-filled thin-walled steel tube supported in tunnel
HOU Hetao1, MA Su1, WANG Qi2, JIN Yanjun3, ZHU Wencan1, CHEN Lei1

1. School of Civil Engineering, Shandong University, Jinan 250061, China;
2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China;
3. Department of Building Engineering, Mianyang Vocational and Technical College, Mianyang 621000, China

Abstract:Five concrete-filled thin-walled steel tubes (CTST) and one steel grid were designed as supports, and they were tested in a cable tunnel in Jinan. Test parameters included thickness of steel tube, connection type of steel tube and concrete-filled in steel tube or not. In addition, the CTST mechanical behaviors were compared with that of the steel grid. The results show that in a short period of time, the CTST support can ensure the stability of surrounding rock and its resistance is superior to the traditional steel grid. With the increase of deformation of the rock and soil in the tunnel, the CTST supports with the new connection have good compression resistance. The absolute strain values of vault, connections and tube foot are larger. The finite element (FE) analysis by ABAQUS program is conducted, the analysis results agree well with the test results. The FE model and parameters are proved to be reliable. It can be applied in the engineering projects.

 

Key words: concrete-filled thin-walled steel tube; support used in tunnel; cementitious grouted sleeve connection; finite element analysis

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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