本文已被：浏览 373次 下载 195次
投稿时间：2022-03-13 修订日期：2022-08-30
投稿时间：2022-03-13 修订日期：2022-08-30
中文摘要: 胶凝砂砾石坝（cemented sand-gravel dam，CSG坝）是一种新型坝，具有大坝整体应力水平低、施工快速以及节约工程投资等优点。本文采用地质力学模型试验法，对CSG坝与重力坝在复杂地基上的深层抗滑稳定问题以及破坏差异进行分析，CSG坝原型选取守口堡大坝，与武都重力坝19#坝段坝址区复杂地基相结合成一新坝段，从而模拟CSG坝在复杂地基下的运行情况，并通过模型加载试验得到坝体的变形特点及复杂地基中断层和层间错动带的破坏形态。通过CSG坝与武都重力坝19#坝段的模型试验数据以及两者破坏形态对比分析可以得到：1）在相同的超载倍数下，重力坝坝体较CSG坝坝体变位更大；2）在最终破坏阶段，CSG坝与重力坝坝体均有轻微的扭转，其中重力坝坝体有轻微的顺时针转动，CSG坝坝体有轻微的逆时针转动；3）CSG坝与重力坝所在复杂地基的断层均发生了不同程度的滑移，其中断层10f2、f115发生了较大的相对变位；4）重力坝整体向下游变位较CSG坝明显，挤压破坏情况较为严重；5）模型试验中得到CSG坝安全度为6.4，重力坝安全度为3.0，运用刚体极限平衡分析得到CSG坝安全度为5.9，重力坝安全度为2.5。模型试验结果与理论分析结果相互验证，因此，从两者数据结果可得出CSG坝的极限承载能力较重力坝强，超载系数大，安全度较重力坝高，说明CSG坝是一种高安全性的坝型。
Abstract:Cemented sand-gravel dam (CSG dam) is a new type of dam, and has the advantages of low overall stress level, rapid construction, and saving engineering investment. Aiming at the difference in failure form between the CSG dam and gravity dam on complex foundations and the stability of deep sliding, the method of the geomechanical model test was adopted, selecting the Shoukoubao dam as the prototype of the CSG dam, and comparing it with the Wudu gravity dam 19# dam. The complex foundation of the dam site area was combined to form a new dam section, to simulate the operation of the CSG dam under the complex foundation, and the deformation characteristics of the dam body and the damage of the fault layer and the interlayer dislocation zone of the complex foundation were obtained through the model loading tests. From the model test data of the 19# dam section of the CSG dam and the Wudu gravity dam, and the comparative analysis of the failure modes, the results can be obtained: 1) Under the same overload multiple, the dam body of the gravity dam has a larger displacement than the dam body of the CSG dam; 2) In the final failure stage, both the CSG dam and the gravity dam body are slightly twisted, the gravity dam body rotates slightly clockwise, and the CSG dam body rotates slightly counterclockwise; 3) the faults occur to varying degrees. The relative displacement of the fault layers 10f2 and f115 occurs due to the slippage; 4) The overall downstream displacement of the gravity dam is more obvious than that of the CSG dam, and the crushing damage is more serious; 5) The safety degree of the CSG dam is 6.4 in the model test, the safety degree of gravity dam is 3.0, the safety degree of CSG dam is 5.9 obtained by using the rigid body limit equilibrium analysis, the safety degree of gravity dam is 2.5. The model test results and the theoretical analysis results have been verified by each other. Therefore, from the data results of the two, it can be concluded that the ultimate bearing capacity of the CSG dam is stronger than that of the gravity dam, the overload coefficient is larger, and the safety degree is higher than that of the gravity dam, indicating that the CSG dam is a kind of high-safety dam type.
文章编号：202200201 中图分类号：TV32+1 文献标志码：
基金项目:“十三五”国家重点研发计划（2018YFC0406803）；国家自然科学基金青年基金项目（51709114）
作者简介:第一作者：丁泽霖(1983-),男,副教授,博士.研究方向:水利工程结构模型试验及数值模拟.E-mail:dingzelin@126.com;通信作者：张宏洋,E-mail:zzstar_ncwu_hs@163.com
引用文本：
丁泽霖,王肖楠,张宏洋,王婧,包闯.复杂地基重力坝与胶凝砂砾石坝变形破坏对比分析[J].工程科学与技术,2023,55(4):197-206.
DING Zelin,WANG Xiaonan,ZHANG Hongyang,WANG Jing,BAO Chuang.Comparative Analysis of Deformation and Failure of Gravity Dam with Complex Foundation and Cemented Sand-gravel Dam[J].Advanced Engineering Sciences,2023,55(4):197-206.
引用文本：
丁泽霖,王肖楠,张宏洋,王婧,包闯.复杂地基重力坝与胶凝砂砾石坝变形破坏对比分析[J].工程科学与技术,2023,55(4):197-206.
DING Zelin,WANG Xiaonan,ZHANG Hongyang,WANG Jing,BAO Chuang.Comparative Analysis of Deformation and Failure of Gravity Dam with Complex Foundation and Cemented Sand-gravel Dam[J].Advanced Engineering Sciences,2023,55(4):197-206.