砾石土心墙料水力劈裂试验研究

凌华; 王伟; 王芳; 傅华; 韩华强

doi:10.11779/CJGE201808009

砾石土心墙料水力劈裂试验研究 English Version

凌华^{1, 2},
王伟^3, ,,
王芳^{1, 2},
傅华^{1, 2},
韩华强^{1, 2}

1. 南京水利科学研究院岩土工程研究所,江苏南京 210024;
2.水利部土石坝破坏机理与防控技术重点实验室,江苏南京 210029;
3. 绍兴文理学院,浙江绍兴 312000

基金项目: 国家重点研发计划项目（2017YFC0404800）; 国家自然科学基金面上项目（51679149）

详细信息

作者简介:
凌华(1977- ),男,江苏盐城人,博士,高级工程师,主要从事粗粒土力学特性研究工作。E-mail: hling@nhri.cn。

通讯作者:
王伟，E-mail：wellswang@usx.edu.cn

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- 文章访问数: 316
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出版历程
- 收稿日期: 2017-07-16
- 发布日期: 2018-08-24

Experimental study on hydraulic fracture of gravelly soil core

LING Hua^{1, 2},
WANG Wei^3, ,,
WANG Fang^{1, 2},
FU Hua^{1, 2},
HAN Hua-qiang^{1, 2}

1. Geotechnical Engineering Department of Nanjing Hydraulic Research Institute, Nanjing 210024, China;
2. Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques, Ministry of Water Resources, Nanjing 210029, China;
3. School of Civil Engineering, Shaoxing University, Shaoxing 312000, China

摘要

摘要: 在改进的三轴仪上开展了两种不同级配砾石土心墙料的水力劈裂试验。根据试验结果得到了以下结论：砾石土心墙料的自身性质与围压是影响劈裂压力的关键性因素,水力劈裂破坏主要表现为击穿破坏;相同试验条件下,随围压、固结比和水压加荷速率的提高,水力劈裂试验的流量降低;对于砾石土心墙料,当粉粒与黏粒含量较高时,由于颗粒间的胶结力更强,相同围压、固结比和加载速率条件下试样的破坏劈裂应力要更高,但不同级配砾石土的劈裂压力随围压的增长幅度变化不大;固结比或轴向应力对砾石土心墙料的劈裂压力影响不大,在文中试验条件下,加荷速率对破坏劈裂压力影响也不大。
- 砾石土 /
- 水力劈裂 /
- 试验研究
Abstract: The hydraulic fracture tests on two kinds of graded gravelly soils are carried out by using the improved triaxial apparatus. For the hydraulic fracture pressures on the gravelly soils, the soil properties and confining pressure are the key influence factors. The hydraulic failure mode of gravelly soils is always shown as breakdown. The flow capacity in the tests decreases with the increase of the confining pressure, consolidation ratio and injection pressure rate. The hydraulic fracture pressure increases with the fine particle content of the gravelly soils because of the self-cohesiveness. However, the effect on the fracture pressure with the increasing confining pressure is similar for different graded gravelly soils. The consolidation ratio or axial stress has the slight effect on the fracture pressures, and so does the hydraulic pressure rate.
- gravelly soil /
- hydraulic fracture /
- experimental study

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参考文献(16)

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