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Strength Assessment of Broken Rock Postgrouting Reinforcement Based on Initial Broken Rock Quality and Grouting Quality
Joint Authors
Xu, Hongfa
Geng, Hansheng
Chen, Feng
Chen, Xiao
Qi, Liangliang
Source
Mathematical Problems in Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-03-15
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
To estimate postgrouting rock mass strength growth is important for engineering design.
In this paper, using self-developed indoor pressure-grouting devices, 19 groups of test cubic blocks were made of the different water cement ratio grouting into the broken rock of three kinds of particle sizes.
The shear strength parameters of each group under different conditions were tested.
Then this paper presents a quantitative calculation method for predicting the strength growth of grouted broken rock.
Relational equations were developed to investigate the relationship between the growth rates of uniaxial compressive strength (UCS), absolute value of uniaxial tensile strength (AUTS), internal friction angle, and cohesion for post- to pregrouting broken rock based on Mohr-Coulomb strength criterion.
From previous test data, the empirical equation between the growth rate of UCS and the ratio of the initial rock mass UCS to the grout concretion UCS has been determined.
The equations of the growth rates of the internal friction coefficient and UCS for grouting broken rock with rock mass rating (RMR) and its increment have been established.
The calculated results are consistent with the experimental results.
These observations are important for engineered design of grouting reinforcement for broken rock mass.
American Psychological Association (APA)
Xu, Hongfa& Geng, Hansheng& Chen, Feng& Chen, Xiao& Qi, Liangliang. 2017. Strength Assessment of Broken Rock Postgrouting Reinforcement Based on Initial Broken Rock Quality and Grouting Quality. Mathematical Problems in Engineering،Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1190230
Modern Language Association (MLA)
Xu, Hongfa…[et al.]. Strength Assessment of Broken Rock Postgrouting Reinforcement Based on Initial Broken Rock Quality and Grouting Quality. Mathematical Problems in Engineering No. 2017 (2017), pp.1-14.
https://search.emarefa.net/detail/BIM-1190230
American Medical Association (AMA)
Xu, Hongfa& Geng, Hansheng& Chen, Feng& Chen, Xiao& Qi, Liangliang. Strength Assessment of Broken Rock Postgrouting Reinforcement Based on Initial Broken Rock Quality and Grouting Quality. Mathematical Problems in Engineering. 2017. Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1190230
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1190230