基于组成结构与水文特征的堰塞坝溃决危险性评估
文献类型：学位论文
| 作者 | 胡桂胜
|
| 学位类别 | 博士 |
| 答辩日期 | 2012-05-24 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 陈宁生 |
| 关键词 | 堰塞坝 危险性评估 模型试验 组成结构 稳定性 坝体寿命 |
| 其他题名 | The Risk Assessment of Outburst for Barrier Dam Based on the Characteristics of Composition-Structure and Hydrology |
| 学位专业 | 岩土工程 |
| 中文摘要 | 论文从堰塞坝溃决危险性评估的基础理论入手，研究了堰塞坝组成结构特征、流域水文特征等基础与关键因素，建立了基于堰塞坝组成结构与水文特征的堰塞坝溃决危险性评估指标体系，并选择了四川茂县宗渠堰塞坝为堰塞坝漫顶溃决试验原型进行了堰塞坝稳定性试验、堰塞坝破坏程度与溃决影响试验、堰塞坝寿命预测试验；在试验数据分析的基础上，引入二值逻辑回归分析方法和多元回归分析方法建立了堰塞坝稳定性评估模型、堰塞坝破坏程度评估模型、堰塞坝寿命预测模型，并结合汶川地震堰塞坝典型案例对堰塞坝稳定性评估模型、堰塞坝寿命预测模型进行了验证与分析；最后，结合对模型与试验过程的分析对堰塞坝溃决危险性影响因素进行了理论分析。基于组成结构与水文特征的堰塞坝溃决危险性评估完成了相关理论与技术的实证研究，适应了防灾减灾工作的实际需要，具有重要的理论价值和现实意义。 论文研究主要取得以下研究成果： 1. 基于组成结构与水文特征，建立了堰塞坝溃决危险评估指标体系 2. 应用模型试验手段建立了堰塞坝溃决危险性评估试验数据库选择了四川省茂县宗渠堰塞坝作为模型试验原型，首先对宗渠堰塞坝基本特征、宗渠堰塞坝溃决过程等方面进行了介绍；其次，根据前面对坝体组成结构特征的分析，选用坝体的几何尺寸、密度、级配、最大库容、上游来水量作为主要的试验参数，在此基础上，以1：100为模型相似比进行堰塞坝稳定性、堰塞坝破坏程度与溃决影响、堰塞坝寿命预测试验，并对试验数据进行分析与整理，为后面的模型建立与分析提供丰富的试验数据，也为评估模型建立奠定了基础。 3. 基于堰塞坝稳定性评估指标差异性，提出了快速评估和基于野外调查两个阶段的堰塞坝稳定性评估模型，并进行了典型案例实证研究通过对堰塞坝稳定性试验数据分析与研究，引入二值逻辑回归分析方法，建立了不同阶段的堰塞坝稳定性评估模型，并运用汶川地震红石河堰塞坝和草塘房堰塞坝对模型进行验证分析，验证结果较为理想。 4. 建立了堰塞坝破坏程度、溃决影响程度评估指标与评估模型引入了坝高残余比、坝体中轴溃口宽度、溃决峰值流量指标对堰塞坝破坏程度、溃决影响程度进行评估。基于坝高残余比、坝体中轴溃口宽度、溃决峰值流量试验数据的分析与研究，并借助于多元回归分析方法建立了相应的堰塞坝破坏程度评估模型。 5. 基于堰塞坝溃决完成时间试验时间，引入多元回归分析方法，建立了堰塞坝寿命预测模型，并以汶川地震宗渠堰塞坝为例对预测模型进行了验证与分析，验证结果较为理想。 6. 基于模型与试验过程分析的方式，分别对堰塞坝稳定性、坝体破坏程度、坝体寿命影响因素进行了分析，进一步提升了堰塞坝溃决危险性的理论研究。 |
| 英文摘要 | The risk assessment of outburst for barrier dam contains three aspects as follows: (a) (whether the barrier dam would burst out or not, that is) the stability assessment of barrier dam. (b) (the factors of destructive degree for barrier dam，and whether the peak discharge of the outburst of barrier dam would threat the security of the downstream. That is) the destruction assessment of the barrier dam. (c) when the barrier dam would burst out, that is the life assessment of barrier dam. According to the above problems, the characteristics of composition-structure and hydrology for barrier dam were studied based on basic theory of risk assessment, and an evaluation index system，degree of damage to barrier dam and the life of dam were established by binary logistic regression analysis and multiple regression analysis methods. These evaluation models were proved to be valid with barrier dams by Wenchuan Earthquake. Finally, the paper studied the influential factors of outburst risk for barrier dam with the analysis of the model and the process of experiments. The risk assessment of outburst for barrier dam based on the characteristics of composition-structure and hydrology was selected as case studies to testify relevant theories and key technologies. It adapts to actual needs of the disaster prevention and mitigation and has the important theoretical and practical significance. was established. Based on the collected data and field investigations, the author chooses Zongqu Barrier dam as the prototype to conduct the model experiment, with a similar ratio of 1:100. In this dissertation, some experiments about stability of barrier dam, degree of damage to barrier dam, outburst influence and life of barrier dam were conducted. Evaluation models for the stability of barrier dam This paper consists of eight chapters: (1) Introduction; (2) The characteristics of composition-structure and hydrology for barrier dams; (3) Model experiments of overtopping outburst for barrier dams; (4) The assessment models and verification for the stability of barrier dams; (5) Evaluation index and model for degree of damage to barrier dams; (6) The preliminary study of life prediction model for barrier dams; (7) Analysis of influential factors on outburst risk of barrier dams; (8) Conclusions. The main results are as follows: (a) The evaluation index system was established based on the characteristics of composition-structure and hydrology for barrier dam. The paper analysis the characteristics of composition-structure and hydrology based on massive data and field investigation. The characteristics of composition consist of four aspects: 1) particle gradation; 2) soil composition; 3) rock composition; 4) composition morphology. The characteristics of structure consist of two aspects: 1) geometric shape; 2) density. The characteristics of hydrology also consist of two aspects: 1) upstream inflow; 2) the characteristics of maximum water capacity. The evaluation index system was established based on the characteristics of composition-structure and hydrology for barrier dams. (b) The experiment database of risk assessment for barrier dams was established based on model experiment method. The author chooses Zongqu Barrier dam as a prototype to conduct the model experiment, with a similar ratio of 1:100. Experiments for the stability of barrier dams, degree of damage to barrier dams, outburst influence and life of barrier dam have been conducted. These experiments provided rich materials for the establishment and analysis of mode. (c) The evaluation model of barrier dam stability in two stages was established and certificated by Wenchuan Earthquake based on the difference of evaluation index. The evaluation models of barrier dam stability in different stages were established by binary logistic regression analysis method based on research and analysis of the barrier dam stability experiments. Evaluation models were validated by Hongshihe dam and Caitangfang dam, and the result turns out satisfactory. (d) Evaluation index and models of degree of damage to barrier dam were established based on residual ratio of dam height, outburst mouth width of a medial axis, outburst peak flow by multiple regression analysis method. (e) Life prediction model of barrier dam was established based on completing time of outburst by multiple regression analysis method, and was validated by Zongqu dam. (f) The influential factors of stability of barrier dam, degree of damage to barrier dam, life of dam were analyzed respectively based on the model and the test process, and the theoretical research of risk assessment of outburst for barrier dams was promoted further. |
| 语种 | 中文 |
| 公开日期 | 2013-01-15 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4808]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 推荐引用方式 GB/T 7714 | 胡桂胜. 基于组成结构与水文特征的堰塞坝溃决危险性评估[D]. 北京. 中国科学院研究生院. 2012. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。