北疆地区砾石土岸坡冲刷破坏大比尺模型试验及其破坏机理研究

赵波; 张桂荣; 何宁; 王国利; 何斌; 周成

doi:10.11779/CJGE201605021

北疆地区砾石土岸坡冲刷破坏大比尺模型试验及其破坏机理研究 English Version

赵波^{1, 2},
张桂荣^1,,
何宁¹,
王国利¹,
何斌¹,
周成³

1. 南京水利科学研究院水利部土石坝破坏机理与防控技术重点实验室,江苏南京 210024;
2. 中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳 550081;
3. 四川大学水利水电学院,四川成都 610065

基金项目: 水利部公益性行业科研专项项目（201301022,201201037）; 国家自然科学基金项目（51579167,51009097）; 2012年度江苏省水利科技项目（2012009,2012030）

详细信息

作者简介:
赵波(1983- ),男,硕士,主要从事环境岩土工程方向研究。E-mail: grzhang@nhri.cn。

通讯作者:
张桂荣

中图分类号: TU443
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出版历程
- 收稿日期: 2015-04-23
- 发布日期: 2016-05-24

Large scale model tests on scour failure of gravelly soil bank slope in northern area of Xinjiang and its failure mechanism

1. Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth Rock Dam of the Ministry of Water Resource, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
2. Guiyang Engineering Corporation Limited of Power CHINA, Guiyang 550081, China;
3. College of Water Resource & Hydropower, Sichuan University, Chengdu 610065

摘要

摘要: 以北疆地区广泛存在的砾石土重建岸坡,开展砾石土岸坡冲刷破坏大比尺模型试验研究。引入新型观测方法三维激光扫描技术,对岸坡冲刷破坏全过程进行观测,并详细分析获取的扫描数据。联合三维激光扫描和现场传统测量成果,依据不同阶段的破坏特征,将岸坡破坏划分为3个阶段,即冲刷破坏阶段、局部失稳阶段和整体失稳阶段,确定北疆地区砾石土岸坡的冲刷变形失稳过程与破坏模式。基于砾石土岸坡大比尺模型试验成果,推导建立砾石土岸坡稳定性计算公式和局部失稳破坏高度预测公式,并建立砾石土岸坡冲刷破坏阶段和局部失稳阶段的有机联系,以深入揭示砾石土岸坡失稳破坏机理。
- 砾石土岸坡 /
- 冲刷破坏 /
- 破坏机理 /
- 大比尺模型试验
Abstract: The gravelly soil widespread in norther area of Xinjiang is chosen to reconstruct bank slope. Large scale model tests on hydraulic scour of gravelly soil bank slope are carried out. A new observation method, three-dimensional laser scanning technique, is introduced to observe erosion damage of the bank slope. Based on the results of 3D laser scanning and traditional measurement methods, according to the failure characteristics at different stages, the failure of the bank slope is divided into three stages, namely scour damage stage, local instability stage and overall instability stage. The instability process of deformation and the failure mode of the gravelly soil bank slope are determined. Based on the test results, the formulae for calculating the stability and predicting the local buckling failure height are derived. Through this study, the relation between the scour damage phase and the local buckling stage is established, and the failure mechanism of typical gravelly soil bank slope is deeply revealed.
- gravelly soil bank slope /
- scour failure /
- failure mechanism /
- large scale model test

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参考文献(14)

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