|Table of Contents|

Anchorage effect and support parameters optimization of prestressed hollow bolts with expanded shell in rockburst section of tunnel(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2023年1期
Page:
123-132
Research Field:
隧道工程
Publishing date:

Info

Title:
Anchorage effect and support parameters optimization of prestressed hollow bolts with expanded shell in rockburst section of tunnel
Author(s):
WANG Wei-tao1;  LU Wu-min1;  WANG Wei-kang1;  SHI Yu-peng1;  JIA Shi-kong2; YANG Qiang2;  WANG Zhi-feng2
(1. The No.1 Engineering Co.,Ltd of China Railway Beijing Engineering Group, Xi’an 710000, Shaanxi, China; 2. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China)
Keywords:
tunnel engineering;  rock burst;  numerical simulation;  prestressed hollow bolt with expanding shell;  reinforcement effect;  optimization of support parameter
PACS:
U455.71
DOI:
10.19721/j.cnki.1671-8879.2023.01.013
Abstract:
In order to study the anchoring effect and supporting ability of expanded shell prestressed hollow bolt in rock burst section of tunnel, the anchoring effect of expanded shell anchoring and other anchoring forms in rock burst tunnel was compared and analyzed by field anchoring test based on Xiangshan Tunnel Engineering in Zhonglan(form Zhongwei to Lanzhou)Railway, and the finite element numerical analysis software MIDAS/GTS NX was adopted. By analyzing the influence of surrounding rock pressure, surrounding rock deformation and bolt axial force on the stability of surrounding rock under different working conditions, the optimized supporting parameters of the expanded shell prestressed hollow bolt were proposed. Based on the field measured data, the field application effects of the expanded shell prestressed hollow bolt and ordinary mortar bolt were evaluated. The results show that compared with resin anchoring, cement coil anchoring and cement mortar anchoring, expanded shell anchoring is the best anchoring form for its maximum anchoring force, timeliness of support and strong durability, and can meet the requirements of the rapid prestressed anchoring form of rockburst tunnel. The influence degree of extension-shell prestressed hollow bolt supporting parameters on the stability of surrounding rock is bolt spacing, bolt length, prestressed, bolt diameter. The optimal combination of extension-shell prestressed hollow bolt supporting parameters in the rock burst section of Xiangshan Tunnel is 25 mm in diameter, 1.2 m in spacing, 80 kN in prestressed and 3.5 m in length. Compared with the common mortar bolt, the deformation of S1 and S2 lines decreased by 57.1%, 61.9% and 64.4% compared with the same period of last year, and the convergence time was advanced by 3 to 5 days. The surrounding rock pressure values of the vault and the left and right arches decreased by 32.1%, 36.5% and 34.2%. The application superiority of expanded shell prestressed hollow bolt in rock burst tunnel is further verified.3 tabs, 13 figs, 15 refs.

References:

[1] 陈仲先,汤 雷.高地应力大型地下洞室的位移和锚杆应力特性[J].岩土工程学报,2000,22(3):294-298.
CHEN Zhong-xian,TANG Lei.Rock displacement and load of bolts around large scale cavities with high stress[J].Chinese Journal of Geotechnical Engineering,2000,22(3):294-298.
[2]赵 旭,程鼎甲,代志杰,等.断层错动形式对输水隧洞的影响[J].长安大学学报(自然科学版),2021,41(5):96-106.
ZHAO Xu,CHENG Ding-jia,DAI Zhi-jie,et al.Influence of fault dislocation on water conveyance tunnel[J].Journal of Chang’an University(Natural Science Edition),2021,41(5):96-106.
[3]李 峰.高地应力构造破碎带隧道大变形灾变机制及控制技术研究[J].铁道科学与工程学报,2021,18(5):1222-1230.
LI Feng.Study on mechanism and control technology of large deformation disaster of tunnel in fracture zone with high in-situ stress[J].Journal of Railway Science and Engineering,2021,18(5):1222-1230.
[4]PAN Y D,ZHANG H,HAO Z H,et al.Engineering properties of soft rock with high ground stresses and the performance under excavation of deep tunnel[J]Arabian Journal for Science and Engineering,2022,47(10):13349-13364.
[5]刘宇鹏,夏才初,吴福宝,等.高地应力软岩隧道长、短锚杆联合支护技术研究[J].岩石力学与工程学报,2020,39(1):105-114.
LIU Yu-peng,XIA Cai-chu,WU Fu-bao,et al.A combined support technology of long and short bolts of soft rock tunnels under high ground stresses[J].Chinese Journal of Rock Mechanics and Engineering,2020,39(1):105-114.
[6]屈 彪,何治良,王大国,等.复杂应力条件下不同锚杆支护的巷道稳定性[J].金属矿山,2016(1):147-152.
QU Biao,HE Zhi-liang,WANG Da-guo,et al.Stability comparison of the roadway supporting by different types of anchor under complicated stress conditions in Jinchuan No.3 Mine Area[J].Metal Mine,2016(1):147-152.
[7]冯 艺,石 钊,张照太,等.涨壳式中空预应力锚杆在TBM法隧洞施工中的应用和改进[J].现代隧道技术,2011,48(1):160-164.
FENG Yi,SHI Zhao,ZHANG Zhao-tai,et al.Application and modification of swelling prestressed bolts in a TBM excavated tunnel[J].Modern Tunnelling Technology,2011,48(1):160-164.
[8]HOBST L,ZAJIC J.Anchoring in rock and soil[M].New York:Elsevier,1983.
[9]刘 江,王 军,徐腾辉.涨壳式预应力中空锚杆在机械化开挖大断面隧道中的施工应用研究[J].隧道建设(中英文),2018,38(增2):324-329.
LIU Jiang,WANG Jun,XU Teng-hui.Research of swelling prestressed bolts using in mechanized excavation of large section tunnel[J].Tunnel Construction,2018,38(S2):324-329.
[10]康红普,姜铁明,高富强.预应力锚杆支护参数的设计[J].煤炭学报,2008,33(7):721-726.
KANG Hong-pu,JIANG Tie-ming,GAO Fu-qiang.Design for pretensioned rock bolting parameters[J].Journal of China Coal Society,2008,33(7):721-726.
[11]郭建新,高永涛.基于围岩破坏区和承载力的锚杆支护设计[J].长安大学学报(自然科学版),2008,28(6):65-68.
GUO Jian-xin,GAO Yong-tao.Design of anchor bolt support based on analysis of surround rock damage area and bear force[J].Journal of Chang’an University(Natural Science Edition),2008,28(6):65-68.
[12]戴 俊,郭相参.煤矿巷道锚杆支护的参数优化[J].岩土力学,2009,30(增1):140-143.
DAI Jun,GUO Xiang-can.Parameter optimization of bolting for coalmine roadways[J].Rock and Soil Mechanics,2009,30(S1):140-143.
[13]李德军,于程硕,谢东武.大跨度城市山岭隧道初期支护参数优化研究[J].现代隧道技术,2020,57(增1):387-393.
LI De-jun,YU Cheng-shuo,XIE Dong-wu.Optimization of initial support parameters of large-span urban mountain tunnels[J]. Modern Tunnelling Technology,2020,57(S1):387-393.
[14]汪 波,王振宇,郭新新,等.软岩隧道中基于快速预应力锚固支护的变形控制技术[J].中国公路学报,2021,34(3):171-182.
WANG Bo,WANG Zhen-yu,GUO Xin-xin,et al.Deformation control technology based on fast-prestressed anchor support in soft rock tunnel[J].China Journal of Highway and Transport,2021,34(3):171-182.
[15]徐立功,李 浩,陈祥林,等.锚杆参数对围岩稳定性影响的数值分析[J].岩土工程学报,2010,32(增2):249-252.
XU Li-gong,LI Hao,CHEN Xiang-lin,et al.Numerical analysis on the impact of rock bolt parameters on stability of surrounding rock[J].Chinese Journal of Geotechnical Engineering,2010,32(S2):249-252.

Memo

Memo:
-
Last Update: 2023-01-30