Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (2): 631-640.doi: 10.13229/j.cnki.jdxbgxb20181285

Previous Articles    

Mechanical analysis of full⁃length anchorage with high pretension post⁃tensioning method

Wen-bin TAO1(),Jun-ling HOU2(),Tie-lin CHEN1,Bin TANG3   

  1. 1.School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
    2.School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China
    3.School of Civil Engineering and Architeture, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2018-12-29 Online:2020-03-01 Published:2020-03-08
  • Contact: Jun-ling HOU E-mail:taowenbin0963@sina.com;13956408171@139.com

RICH HTML

 12   

PDF (PC)

157

Abstract:

To solve the problems of uneven overall force, low shear bearing capacity and inadaptability to large deformation of anchor bolt in deep roadway supported by lengthened or full-length anchor bolt, a Full-length Anchorage (FLA) support method with High Pretension Post-tensioning (HP-PT) is proposed in this paper. By establishing the mechanical model of FLA support with HP-PT method, the mechanical characteristics and bearing capacity of the anchorage section of FLA support with HP-PT method are calculated and analyzed theoretically, and compared with the traditional lengthened and FLA support method. The results show that the FLA support with HP-PT method has the advantages of both high pretension support and FLA support. Compared with the traditional lengthening and support method, the FLA with HP-PT support method makes the distribution of shear stress more gentle; it is conducive to the diffusion of pre-tightening force in confining pressure, enlarges the range of compressive stress zone of surrounding rock, improves the characteristics of anchored surrounding rock; and using high Pre-tightening Force pallet can form a more effective supporting structure of anchored surrounding rock.

Key words: geotechnical engineering, high preload, full-length anchorage, post tension method, high pre-tightening force pallet, structure of surrounding rock

CLC Number: 

  • TD353

Fig.1

Strengthened anchorage force diagram"

Fig.2

Full-length anchorage force diagram"

Fig.3

Diagram of force on fast resin anchor"

Fig.4

Force diagram of micro-unit"

Fig.5

Schematic diagram of full-length anchorage force with high preloading force"

Fig.6

Shear stress distribution at interface of anchor"

Fig.7

Distribution of bolt axial force"

Fig.8

Traditional ball gasket and high pre-tightening force pallet"

Fig.9

Pre-tightening force conversion curve"

Fig.10

High pre-tightening force pallet assembly sketch"

Fig.11

Roadway roof displacement distribution"

1 康红普, 范明建, 高富强, 等. 超千米深井巷道围岩变形特征与支护技术[J]. 岩石力学与工程学报, 2015, 34(11): 2227-2241.
Kang Hong-pu, Fan Ming-jian, Gao Fu-qiang, et al. Deformation and support of rock roadway at depth more than 1 000 meters[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(11): 2227-2241.
2 袁亮, 薛俊华, 刘泉声, 等. 煤矿深部岩巷围岩控制理论与支护技术[J]. 煤炭学报, 2011, 36(4): 535-543.
Yuan Liang, Xue Jun-hua, Liu Quan-sheng, et al. Surrounding rock stability control theory and support technique in deep rock roadway for coal mine[J]. Journal of China Coal Society, 2011, 36(4): 535-543.
3 刘泉声, 刘恺德. 淮南矿区深部地应力场特征研究[J]. 岩土力学, 2012, 33(7): 2089-2096.
Liu Quan-sheng, Liu Kai-de. Characteristics of in-situ stress field for deep levels in Huainan coal mine[J]. Rock and Soil Mechanics, 2012, 33(7): 2089 -2096.
4 谢广祥, 李传明, 王磊. 巷道围岩应力壳力学特征与工程实践[J]. 煤炭学报, 2016, 41(12): 2986-2992.
Xie Guang-xiang, Li Chuan-ming, Wang Lei. Mechanical characteristics and practical application on stress shell of roadway surrounding rock［J］. Journal of China Coal Society, 2016, 41(12): 2986-2992.
5 常聚才, 谢广祥. 深部巷道围岩力学特征及其稳定性控制[J]. 煤炭学报, 2009, 34(7): 881-886.
Chang Ju-cai, Xie Guang-xiang. Mechanical charactristics and stability control of rock roadway surrounding rock in deep mine[J]. Journal of China Coal Society, 2009, 34(7): 881-886.
6 陈浩, 任伟中, 李丹, 等. 深埋隧道锚杆支护作用的数值模拟与模型试验研究[J]. 岩土力学, 2011, 32(增刊1): 719-724, 786.
Chen Hao, Ren Wei-zhong, Li Dan, et al. Numerical simulation and model test study of mechanismof bolt in deep tunnel[J]. Rock and Soil Mechanics, 2011, 32(Sup.1): 719-724, 786.
7 康红普, 姜鹏飞, 蔡嘉芳. 锚杆支护应力场测试与分析[J]. 煤炭学报, 2014, 39(8): 1521-1529.
Kang Hong-pu, Jiang Peng-fei, Cai Jia-fang. Test and analysis on stress field caused by rock bolting [J]. Journal of China Coal Society, 2014, 39(8): 1521-1529.
8 徐佑林, 康红普. 高预应力锚杆支护对煤与瓦斯突出控制作用研究[J]. 煤炭学报, 2013, 38(7): 1168-1173.
Xu You-lin, Kang Hong-pu. The study on control coal and gas outburst with high prestress rock bolting[J]. Journal of China Coal Society, 2013, 38(7): 1168-1173.
9 张农, 李桂臣, 阚甲广. 煤巷顶板软弱夹层层位对锚杆支护结构稳定性影响[J]. 岩土力学, 2011, 32(9): 2753-2758.
Zhang Nong, Li Gui-chen, Kan Jia-guang. Influence of soft interlayer location in coal roof on stability of roadway bolting structure[J]. Rock and Soil Mechanics, 2011, 32(9): 2753-2758.
10 赵一鸣, 张农, 郑西贵, 等. 千米深井厚硬顶板直覆沿空留巷围岩结构优化[J]. 采矿与安全工程学报, 2015, 32(5): 714-720.
Zhao Yi-ming, Zhang Nong, Zheng Xi-gui, et al. Structural optimization of overlying strata for gob-side entry retaining in 1000 m deep mine with direct thick and hard roof[J]. Journal of Mining & Safety Engineering, 2015, 32(5): 714-720.
11 许兴亮, 张农, 李桂臣, 等. 巷道覆岩关键岩梁与预应力承载结构力学效应[J]. 中国矿业大学学报, 2008, 37(4): 560-564.
Xu Xing-liang, Zhang Nong, Li Gui-chen, et al. Mechanical properties of the key rock beam and pre-stressed load-bearing frame covering roadway[J]. Journal of China University of Mining & Technology, 2008, 37(4): 560-564.
12 周辉, 徐荣超, 张传庆, 等. 预应力锚杆内锚固段长度效应研究[J]. 岩土力学, 2015, 36(9): 2688-2694.
Zhou Hui, Xu Rong-chao, Zhang Chuan-qing, et al. Research on effect of interior bonding section length of prestressed anchor rod[J]. Rock and Soil Mechanics, 2015, 36(9): 2688-2694.
13 尤春安, 战玉宝. 预应力锚索锚固段的应力分布规律及分析[J]. 岩石力学与工程学报, 2005, 24(6): 925-928.
You Chun-an，Zhan Yu-bao. Distributing characters and analysis of stresses in prestressed cables[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(6): 925-928.
14 姚显春, 李宁, 陈蕴生. 隧洞中全长粘结式锚杆的受力分析[J]. 岩石力学与工程学报, 2005, 24(13): 2272-2276.
Yao Xian-chun, Li Ning, Chen Yun-sheng. Theoretical solution for shear stresses on interface of fully grouted bolt in tunnels[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(13): 2272-2276.
15 李桂臣, 孙辉, 张农, 等. 中空注浆锚索周边剪应力分布规律研究[J]. 岩石力学与工程学报, 2014, 33(增刊2): 3856-3864.
Li Gui-chen, Sun Hui, Zhang Nong, et al. An investigation into shear stress distribution around hollow grouting anchor cables[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(Sup.2): 3856-3864.
16 王洪涛, 王琦, 王富奇, 等. 不同锚固长度下巷道锚杆力学效应分析及应用[J]. 煤炭学报, 2015, 40(3): 509-515.
Wang Hong-tao, Wang Qi, Wang Fu-qi, et al. Mechanical effect analysis of bolts in roadway under different anchoring lengths and its application[J]. Journal of China Coal Society, 2015, 40(3): 509-515．
17 万世成, 黄侨, 关健, 等. 预应力碳纤维板加固钢-混凝土组合连续梁负弯矩区试验[J]. 吉林大学学报: 工学版, 2019, 49(4): 1114-1123.
Wan Shi-cheng, Huang Qiao, Guan Jian, et al. Strengthening of continuous steel-concrete composite beams in negative moment region using prestressed carbon fiber-reinforced polymer plates[J]. Journal of Jilin University (Engineering and Technology Edition), 2019, 49(4): 1114-1123.
18 孙正, 黄钰期, 俞小莉. 径向滑动轴承润滑油膜流动-传热过程仿真[J]. 吉林大学学报: 工学版, 2018, 48(3): 744-751.
Sun Zheng, Huang Yu-qi, Yu Xiao-li. Numerical simulation of flow and heat transfer in journal bearing lubrication[J]. Journal of Jilin University (Engineering and Technology Edition), 2018, 48(3): 744-751.
[1] Deng-hui GAO,Yi-chuan XING,Min-xia GUO,Ai-jun ZHANG,Xian-tao WANG,Bao-hong MA. Modified hyperbola model of interface between unsaturated remolded loess and concrete [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 156-164.
[2] GU Hai-dong,LUO Chun-hong. Experiment on soil arching effect of pit supporting structure with scattered row piles and soil nail wall [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(6): 1712-1724.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd