Experimental Study on Shear mechanism of Rock Discontinuities

岩石结构面剪切机理试验研究

• 批准号: 02452227
• 负责人: TERADA Makoto
• 金额: $ 2.05万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452227/
• 关键词: Rock discontinuities; Shear strength; Discontinuous rock; Roughness of surface

Main results obtained in this project are following.1. It is observed that the surface roughness of discontinuities in the higher frequency region, than the defined one depend on the normal stress, are fractured, after the shear test of rock discontinuities under the condition of the constant normal stress.2. Progressing the shear displacement, the fracture of the surface roughness of rock discontinuities occurs in the high frequency components, and develops to the lower components. But the climb over the toughness occurs at the limit frequency depend on the normal stress.3. The shear strength at a certain displacement, depends on the strength of the roughness components, in which fracture is occurring mainly. In the case that the climb over the roughness occurs, the shear strength is kept constant. This corresponds to the residual strength.4. The fracture of the surface roughness does not occur, until the peak shear strength appears. At the peak strength, the fracture develops at once to the some extent of higher frequency roughness.5. The normal dilatation accompanied with the shear displacement, also depends on the roughness components in which fracture is occurring mainly, or the limit frequency of the climb over roughness.

本课题取得的主要成果如下：1。在恒定法向应力条件下对岩体结构面进行剪切试验后发现，结构面在高频区域的表面粗糙度比定义的表面粗糙度取决于正应力，其表面粗糙度是断裂的。随着剪切位移的推进，岩体结构面表面粗糙度的破坏发生在高频分量，并向低频分量发展。但在极限频率下，韧性的爬升取决于正应力。在一定位移下的抗剪强度取决于主要发生断裂的粗糙度成分的强度。在粗糙度发生爬升的情况下，抗剪强度保持不变。这对应于剩余强度。表面粗糙度的断裂不会发生，直到峰值抗剪强度出现。在峰值强度下，断口立即发育为一定程度的高频粗糙度。伴随剪切位移的正常扩张也取决于主要发生断裂的粗糙度分量，或粗糙度的极限爬坡频率。

项目成果

SAITO, Toshiaki: "Roughness of Rock Discontinuities and Their Shear Behavior" Poc. of 8th Japan Sympo. on Rock mechanics. 97-102 (1990)

SAITO, Toshiaki：“岩石不连续性的粗糙度及其剪切行为” Poc。

斎藤 敏明: "岩盤不連続面の表面形状特性がせん断強度に及ぼす影響について" 第8回岩の力学国内シンポジウム講演論文集. 97-102 (1990)

Toshiaki Saito：“论岩石不连续面的表面形状特征对抗剪强度的影响”第八届全国岩石力学研讨会论文集97-102（1990）。

斎藤 敏明: "岩盤不連続面の表面形状特性がせん断強度に及ぼす影響" 第8回岩の力学国内シンポジウム講演論文集. 97-102 (1990)

Toshiaki Saito：“岩石不连续面的表面形状特征对剪切强度的影响”第八届全国岩石力学研讨会论文集97-102（1990）。