深部巷道U型约束混凝土拱架力学性能研究及破坏特征

李术才; 王新; 王琦; 李为腾; 王富奇; 杨为民

doi:10.6052/j.issn.1000-4750.2014.07.0630

深部巷道U型约束混凝土拱架力学性能研究及破坏特征

李术才¹,
王新¹,
王琦^1,2,,
李为腾^1,3,
王富奇²,
杨为民¹

1.
山东大学岩土与结构工程研究中心, 山东, 济南 250061;
2.
兖矿集团有限公司博士后科研工作站, 山东, 邹城 273500;
3.
山东科技大学土木工程与建筑学院, 山东, 青岛 266590

基金项目: 国家重点基础研究发展计划(973)项目(2013CB036000);国家自然科学基金项目(51304125,41102184);山东省博士后创新项目专项项目(201301004);山东省优秀中青年科学家科研奖励基金项目(BS2013NJ004)

详细信息

作者简介:
李术才(1965-),男,河北涞水人,教授,博士,主要从事裂隙岩体断裂损伤的教学与研究工作(E-mail:lishucai@sdu.edu.cn);王新(1988-),男,山东聊城人,硕士生,主要从事深部围岩破坏机理及稳定控制的研究(E-mail:sduwangxin2013@163.com);李为腾(1987-),男,山东济宁人,讲师,博士,主要从事深部软岩支护理论与技术方面的研究(E-mail:lwteng2007@163.com);王富奇(1964-),男,河南邓州人,研究员,硕士,主要从事深井围岩支护技术研究(E-mail:wangfuqi@163.com);杨为民(1979-),男,山东滨州人,副教授,博士,主要从事裂隙岩体力学特性与锚固效应方面研究(E-mail:weimin-yang@163.com).

通讯作者:
王琦(1983-),男,山东临沂人,讲师,博士后,主要从事深部软岩支护理论与技术方面的研究(E-mail:wangqi@sdu.edu.cn).

中图分类号: TD353/TD322
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出版历程
- 收稿日期: 2014-07-17
- 修回日期: 2015-04-06
- 刊出日期: 2016-01-24

MECHANICAL PROPERTY RESEARCH AND FAILURE CHARACTERISTICS OF U-TYPE CONFINED CONCRETE ARCH IN DEEP ROADWAY

1.
Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong 250061, China;
2.
Post-Doctoral Scientific Research Station, Yankuang Group Company Limited, Zoucheng, Shandong 273500, China;
3.
College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.

More Information

Corresponding author:
WANG Qi: 10.6052/j.issn.1000-4750.2014.07.0630

摘要

摘要: 为深入研究U 型约束混凝土拱架的力学性能及破坏特征,以直腿半圆形拱架为例,考虑荷载、侧压力系数、节点刚度比、截面刚度、高-径比等影响因素,建立任意节数的U 型约束混凝土拱架的力学模型,得到直腿半圆形拱架理论计算方法。综合分析了U 型约束混凝土拱架的力学性能及破坏特征,开展地下工程约束混凝土拱架1:1 室内力学试验,结合理论计算、数值试验和实体比例室内试验,证明了任意节数U 型约束混凝土拱架理论计算的正确性。研究表明:内力受荷载、侧压力系数和高-径比的影响较大;理论计算中内力最大的两个部位为直腿3/4 高度位置和拱顶位置;在均压情况下,直腿半圆形拱架的变形形态为“拱顶上升,拱腿内敛,整体变瘦高”。研究成果可为深部巷道U 型约束混凝土拱架力学性能及破坏特征研究提供理论和试验依据,为现场工程设计实践提供指导。
- U 型约束混凝土 /
- 拱架 /
- 内力计算 /
- 数值试验 /
- 实体比例室内试验
Abstract: For the further study of mechanics properties and failure characteristics of a U-type confined concrete arch, the load, lateral pressure coefficient, stiffness ratio, high-radius ratio, and other factors were considered to establish the mechanical model for an arbitrary section U-type confined concrete arch, with straight leg semicircular arch as an example, so as to acquire the theoretical calculation method for a straight leg semicircular arch. At the same time, the mechanical properties and failure characteristics of a U-type confined concrete arch were analyzed, the test system of an underground confined concrete arch with the scale ratio of 1:1 was developed, and the correctness of the calculation theory for a U-type confined concrete arch with arbitrary section numbers was verified by comparing with the results of numerical calculation and the entity proportion of laboratory test. The research shows that the internal forces are greatly influenced by loads, lateral pressure coefficients, and high-aspect ratios. The internal forces of the two biggest parts in the theoretical calculation are located in the straight leg of 3/4 height and vault. In a pressure case, the straight leg semicircle arch deformation pattern is "vault, arch legs inside collect, the whole becoming tall". The research results can provide a theoretical and experimental basis for the research of mechanics properties and failure characteristics for a U-type confined concrete arch, and provide a guidance for the practice of engineering design.
- U-type confined concrete /
- arch /
- internal force calculation /
- numerical experiment /
- entity proportion of laboratory test

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