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Geotechnical and Geological Engineering
Published in: Geotechnical and Geological Engineering 6/2020

10-06-2020 | Original Paper

Mechanism and Application of Pre-stressed Grouting Bolt with Constant Resistance and Large Deformation

Authors: Pengfei Jiang, Suolin Jing, Peng Li, Donghe Qi, Jinhai Liu, Xiaogang Deng, Hailiang Zhang

Published in: Geotechnical and Geological Engineering | Issue 6/2020

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Abstract

To study the mechanical properties and its application of the pre-stressed grouting bolt with constant resistance and large deformation (PGBCRLD), the cavity expansion theory and other related mechanical methods were used to calculate and develop the constitutive equation of the grouting bolt. Meanwhile, bolt supporting resistance, tensile deformation and support effect were analyzed and verified by the pull-out test and field practice. The results indicated that properties of the bolt cone end and the strength of surrounding rock were the main factors which influence the support effect of bolts. And when the value of drawing force was more than 220 kN and constant in the pull-out test, the elongating of grouting bolt was up to 75–80% higher than the common one, and good support resistance was maintained. Therefore, the design of grouting structure could control large deformation of surrounding rock effectively, soft rock in particular, and provided a tool to effective control of disaster accidents in coal mine.
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Metadata
Title
Mechanism and Application of Pre-stressed Grouting Bolt with Constant Resistance and Large Deformation
Authors
Pengfei Jiang
Suolin Jing
Peng Li
Donghe Qi
Jinhai Liu
Xiaogang Deng
Hailiang Zhang
Publication date
10-06-2020
Publisher
Springer International Publishing
Published in
Geotechnical and Geological Engineering / Issue 6/2020
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-020-01407-1

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