Field test study on the physical and mechanical characteristics of karst breccia

被引：0

作者：

Guo X. ^{[1
]}

Wu X. ^{[1
]}

Xiong S. ^{[2
]}

机构：

[1] Changjiang River Scientific Research Institute Chongqing Branch, Chongqing

[2] Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 10期

关键词：

Baima navigation-power junction; deformation characteristics; deformation test; direct shear test; karst breccia; mechanical parameter; physical property; strength characteristics; triaxial test;

D O I：

10.11990/jheu.202108041

中图分类号：

学科分类号：

摘要：

A concrete gravity dam is used in the Baima navigation power junction, where karst breccia is present in the dam abutment. They are different in size, with a loose state and mud strips, thus giving rise to problems concerning deformation and stability in a high steep slope after excavation. According to the requirements of slope and dam foundation stability analysis, a series of engineering rock mass tests was conducted, including a rock mass deformation test, direct shear strength test, triaxial compression test, and physical property test. A series of complete test results was obtained. On this basis, in combination with the engineering geological condition, the following recommended values of karst breccia mechanics parameters were proposed by the engineering geologic analogy method: deformation modulus is 0. 05~0. 25 GPa, elastic modulus is 0. 25~0. 50 GPa, shear strength f′ is 0.4~0.6, c′ is 0.08~0.3 MPa, f is 0.35~0.45. © 2022 Editorial Board of Journal of Harbin Engineering. All rights reserved.

引用

页码：1447 / 1453

页数：6

共 11 条

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