深埋分区破裂隧道锚杆支护力学机制
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第 37 卷第 4 期 辽宁工程技术大学学报（自然科学版） 2018年 8 月
Vol.37
No.4 Journal of Liaoning Technical University（Natural Science） Aug. 2018
收稿日期：2017-07-07
基金项目：国家自然科学基金（51374045）
作者简介：朱训国（1974-），男，博士，副教授，主要从事为地下工程稳定性与支护机理方面的研究. 本文编校：杨芳
辽宁工程技术大学学报（自然科学版) 网址：http://202.199.224.158/ http://xuebao.lntu.edu.cn
朱训国,陈卓立,赵德深. 深埋分区破裂隧道锚杆支护力学机制[J].辽宁工程技术大学学报(自然科学版),2018,37(4):703-709.
doi:10.11956/j.issn.1008-0562.2018.04.006
ZHU Xunguo, CHEN Zhuoli, ZHAO Deshen. Rock bolt support mechanism of deep buried zonal disintegration tunnel[J].Journal of
Liaoning Technical University(Natural Science),2018,37(4):703-709. doi:10.11956/j.issn.1008-0562.2018.04.006
深埋分区破裂隧道锚杆支护力学机制
朱训国
1,2
，陈卓立
1,2
，赵德深
1,2
(1. 大连大学 建筑工程学院，辽宁 大连 116622；
2. 大连大学 复杂结构系统灾害预测与控制辽宁省重点实验室，辽宁 大连 116622)
摘 要：为深入研究深埋分区破裂隧道锚杆支护的力学机制，首先通过对实际工程测试结果和模型试验测试结果
进行对比分析，得出分区破裂现象的产生主要是由于深埋隧洞在较大轴向应力作用下，围岩应变域出现拉压交替
所致，而锚杆支护可有效降低围岩的此破坏现象；在此基础上，通过建立锚杆与围岩相互作用力学模型，得到了
锚杆轴向应力和界面摩阻力的分布特征：即锚杆的轴向应力在劈裂环达到峰值，沿锚杆走向形成多个峰值；锚杆
界面摩阻力则会在锚杆锚头一定范围内形成拉应力，在锚杆杆尾一定范围形成压应力.因此，锚杆支护的支护机理
为锚杆锚头在围岩深部压力（压应变）区域与围岩的相互作用呈现嵌入与咬合的锁定作用，锚杆杆尾与围岩的相
互作用则呈现悬吊作用，由此锚杆与支护围岩形成一个比较稳定的自承拱，起到支撑作用.自承拱的出现，使锚杆
和岩体受到了挤压作用.因此，锚杆的作用机理为嵌入-锁定-拉伸-自承-支撑-挤压
关键词：深埋隧洞；分区破裂；锚杆支护；力学机制； 相互作用
中图分类号：TU 45 文献标志码：A 文章编号：1008-0562(2018)04-0703-07
Rock bolt support mechanism of deep buried zonal disintegration tunnel
ZHU Xunguo
1,2
, CHEN Zhuoli
1,2
, ZHAO Deshen
1,2
(1. College of architectural engineering, Dalian University, Dalian 116622, China; 2. Key Laboratory of
disaster prediction and control of complex structure system, Dalian University, Dalian 116622, China)
Abstract: In order to further study the bolt supporting mechanism of the deep zonal disintegration tunnel, this
paper obtained the conclusion that the rock bolt can effectively reduce or eliminate the phenomenon of zonal
disintegration based on the analysis of the in-site engineering test results and the model test results. The zonal
disintegration is mainly due to the larger axial stress to the surrounding rock of the deep tunnel lead to the
alternately emergence of the tensile and compressive strain field. The interaction mechanism model is established
Through the model, the axial stress distribution was obtained which have several stress peak along the rock bolt
axial direction, but the shear stress will be formed tensile stress distribution form within a certain range of rock
bolt head, and the friction stress will be formed compressive stress distribution form within a certain range of rock
bolt tail. Therefore, the rock bolt mechanism is that the interaction of anchor head and compressive stress range
rock mass lead to lock and embedded action, and the interaction of anchor tail and tensile stress range rock mass
lead to suspended action. The rock bolt and support rock mass should form a relatively stable self-supporting arch
to support the surrounding rock. The occurrence of self-supporting arch result in the extrusion action between the
rock bolt and the rock mass. Therefore, the acting mechanism of rock bolt is embedded-locked-tensile-
self-supporting-arch-support-extrusion.
Key words: deep buried tunnel; zonal disintegration; bolt support; anchorage mechanism; interaction
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