| 摘要: |
| 随着我国土石坝建设规模和数量的不断突破,变形控制和破坏防治等难题也愈发突出。监测资料能真实反映大坝的变形情况,而相较于单个测点的监测变形,特征平面的全平面变形能更有效地反映大坝的变形特征。为了提高心墙堆石坝的变形和裂缝分析的可靠性,构建坝顶全平面变形势在必行。本文以瀑布沟高心墙堆石坝工程为例,提出了一种基于多点监测数据统计分析的坝顶全平面变形构建与分析方法。首先,采用分段统计分析的方法构建坝顶各测点沉降统计模型；然后,研究坝顶各测点沉降统计模型参数与其空间坐标的函数关系,构建可反映整个坝顶平面沉降的统计模型,并计算和分析不同时间点坝顶全平面变形；最后,通过对坝顶全平面沉降统计模型求导,得到坝顶全平面变形倾度并进行裂缝分析。结果表明,本文方法能很好地构建坝顶全平面变形模型,分析的变形与裂缝开裂情况与实际吻合。本文研究将土石坝变形分析从独立测点拓展到更加可靠的特征平面,提高监测数据的利用率,为土石坝变形与安全分析提供了有效的技术支持。 |
| 关键词: 高心墙堆石坝 分段统计分析 平面变形 变形倾度 土石坝裂缝 |
| DOI： |
| 分类号:TV641 |
| 基金项目:国家自然科学基金-青年项目(52209168); 陕西省博士后科研项目(2023BSHGZZHQYXMZZ14) |
|
| Full plane deformation construction and crack analysis of HCRD |
|
Zhou Xiongxiong1,2, HE Qiujiang1,2, CAI Wenjun1,2, ZHOU jing1,2
|
|
1.Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A &2.F University
|
| Abstract: |
| With the continuous breakthrough of the scale and quantity of earth-rock dam construction, the problems of deformation control and damage prevention are becoming more and more prominent. The monitoring data can truly reflect the deformation of the dam, and the full-plane deformation of the feature plane can more effectively reflect the deformation characteristics of the dam than the monitoring deformation of a single measuring point. In order to improve the reliability of deformation and crack analysis of high core wall rockfill dam (HCRD), it is necessary to construct the full plane deformation of dam crest. Taking the high core wall rockfill dam of Pubugou as an example, a method of constructing and analyzing the full plane deformation of the dam crest based on the statistical analysis of multi-point monitoring data is proposed in this paper. Firstly, the settlement statistical model of each measuring point at the dam crest is constructed by the method of sectional statistical analysis. Then, the function relationship between the parameters of the statistical model and its spatial coordinates is studied to construct a statistical model that can reflect the settlement of the whole dam crest plane, and the deformation of the dam crest plane at different time points is calculated and analyzed. Finally, by derivation of the statistical model of the full plane settlement of the dam crest, the full plane deformation inclination of the dam crest is obtained and the cracks are analyzed. The results show that the method presented in this paper can construct a full-plane deformation model of the dam crest well, and the deformation and crack conditions analyzed are in agreement with the actual conditions. In this paper, the deformation analysis of earth-rock dam is extended from an independent measurement point to a more reliable feature plane, so as to improve the utilization rate of monitoring data and provide effective technical support for the deformation and safety analysis of earth-rock dam. |
| Key words: HCRD sectional statistical analysis plane deformation deformation inclination earth-rock dam cracks |
