Title:
COMBINED TENSION AND COMPRESSION YIELDING AND ENERGY-ABSORBING GROUTING ANCHOR BOLT FOR LARGE DEFORMATION IN SURROUNDING ROCK, AND WORKING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/007055
Kind Code:
A1
Abstract:
A combined tension and compression yielding and energy-absorbing grouting anchor bolt for large deformation in surrounding rock, comprising a hollow grouting anchor bolt (6), an anchor bolt locking apparatus, a plurality of yielding grouting apparatuses (5) and an energy-absorbing anchor head (7), a bolt body (61) of the hollow grouting anchor bolt (6) being provided with a protective sleeve (64) and several first grouting holes (63), the first grouting holes (63) passing through the protective sleeve (64) to be in communication with a drill hole, the plurality of yielding grouting apparatuses (5) being sleeved on the bolt body (61) of the hollow grouting anchor bolt (6) at intervals, surfaces of the yielding grouting apparatuses (5) being provided with second grouting holes (53), the energy-absorbing anchor head (7) being fixed at an end portion of the hollow grouting anchor bolt (6), the anchor bolt locking apparatus being arranged at a free end of the hollow grouting anchor bolt (6). By means of the yielding grouting apparatuses (5), the yielding and energy-absorbing grouting anchor bolt not only implements real-time reinforcement and support at an early stage of deformation in surrounding rock, but also has a progressive automatic yielding effect, and the energy-absorbing anchor head (7) provides the anchor bolt body with a large support resistance, thereby solving the technical problems of anchor bolt failure and insufficient grouting caused by high surrounding rock stress and large deformation. Also disclosed is a working method for the yielding and energy-absorbing grouting anchor bolt.
Inventors:
LIU XUESHENG (CN)
FAN DEYUAN (CN)
TAN YUNLIANG (CN)
SONG SHILIN (CN)
NING JIANGUO (CN)
HU SHANCHAO (CN)
JIANG NING (CN)
WANG JUN (CN)
GU QINGHENG (CN)
FAN DEYUAN (CN)
TAN YUNLIANG (CN)
SONG SHILIN (CN)
NING JIANGUO (CN)
HU SHANCHAO (CN)
JIANG NING (CN)
WANG JUN (CN)
GU QINGHENG (CN)
Application Number:
PCT/CN2019/076540
Publication Date:
January 09, 2020
Filing Date:
February 28, 2019
Export Citation:
Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
E21D21/00
Domestic Patent References:
| WO2012101433A2 | 2012-08-02 |
Foreign References:
| CN109723480A | 2019-05-07 | |||
| CN207004554U | 2018-02-13 | |||
| GB2138528A | 1984-10-24 | |||
| CN105863695A | 2016-08-17 | |||
| CN206530353U | 2017-09-29 | |||
| CN103643977A | 2014-03-19 |
Attorney, Agent or Firm:
JINAN JINDI INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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