| Project/Area Number |
15560437
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Takamatsu National College of Technology |
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Principal Investigator |
DOI Masanobu Takamatsu National College of Technology, Department of Civil Engineering, Professor, 建設環境工学科, 教授 (10110131)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2004: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2003: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | rock joint / shape assessment / asperity / shear strength / contact incomplete / roughness / shear box test / form of failure |
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| Research Abstract |
A rock mass naturally includes some cracks inside in formation. The size of crack widely varies from minute to huge. The stability of rock structures including macroscopic cracks depends on the configuration and the shear strength property of the rocks. The purpose of this experimental study is to investigate the effect of asperity shape of rock joint on shear strength of rock joint, which is made of artificial plaster material. By simplifying the complicated real geometry of rock joint, the effect of various asperity shape on joint strength was investigated. This study was investigated with ordinary box shear test. Through many experimental studies with respect to various types of shape with the first and second order of asperity, it could be shown to estimate the relationship asperity shape and the joint shear strength. Experiments were also carried out for artificial rock joint with incomplete contact condition. The results of shear strength for incomplete contact specimen gave rather smaller value than complete one. Through many box shear test for specimens with various degree of incomplete contact, it would be clear that the shear strength of joint decreased with the increase in degree of incomplete contact.
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