南水北调中线工程膨胀土渠段边坡变形研究
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摘要
南水北调中线工程干渠渠坡或渠底涉及膨胀土(岩)的渠段约占明渠段的1/3,工程地质条件复杂。膨胀土渠道工程最重要的是边坡稳定问题,如果发生边坡滑塌影响到南水北调中线工程正常通水运行,则社会影响巨大,因此需要开展膨胀土边坡变形控制研究。通过对一般边坡变形控制要求的分析,结合南水北调中线膨胀岩土渠道的特点提出南水北调中线工程膨胀土边坡变形控制要求以及监测数据异常风险研判标准。分析表明:提出的南水北调中线膨胀土边坡变形控制要求及风险预警标准基本合理,可对边坡的变形过程进行合理把控;累计位移速度法能全面反映边坡变形的整个过程,可判断边坡所处的变形阶段,在膨胀土边坡预警中有很强的实用性。对监测资料进行分析可以推断出边坡的变形趋势和变形规律,据之对边坡的变形进行预报,为南水北调中线渠道正常通水运行提供保障。
The drainage section of the trunk canal slope or bottom of the South-to-North Water Diversion Project involves the expansion of soil(rock) and accounts for about one-third of the open channel section. The engineering geological conditions are complex. The most important thing of expansion soil channel engineering is the stability of slope. If the slope collapse affects the normal running of water in the Middle Route of the South-to-North Water Diversion Project and the social impact will be huge. Therefore, it is necessary to carry out the deformation control study of expansion soil and rock slope. Based on the analysis of the deformation control requirements of the general slope and the characteristics of the expansion geotechnical channel of the Middle Route of the South-to-North Water Diversion, the deformation control requirements of the expansion geotechnical slope of the project and the risk evaluation standards for monitoring abnormal data were proposed. The analysis shows that the deformation control requirements and risk warning standards of the expansive soil slope in the Middle Route of South-to-North Water Diversion Project are basically reasonable and the deformation process of the slope can be reasonably controlled. The cumulative displacement rate method can fully reflect the entire process of slope deformation, and can accurately identify the deformation phase of the slope. It is very practical in early warning of expanded soil slope. Based on the analysis of the monitoring data, the deformation trend and the deformation rule of the slope can be inferred, and the deformation of the slope can be predicted to provide guarantees for the normal running of the central channel of the South-to-North Water Diversion.
The drainage section of the trunk canal slope or bottom of the South-to-North Water Diversion Project involves the expansion of soil(rock) and accounts for about one-third of the open channel section. The engineering geological conditions are complex. The most important thing of expansion soil channel engineering is the stability of slope. If the slope collapse affects the normal running of water in the Middle Route of the South-to-North Water Diversion Project and the social impact will be huge. Therefore, it is necessary to carry out the deformation control study of expansion soil and rock slope. Based on the analysis of the deformation control requirements of the general slope and the characteristics of the expansion geotechnical channel of the Middle Route of the South-to-North Water Diversion, the deformation control requirements of the expansion geotechnical slope of the project and the risk evaluation standards for monitoring abnormal data were proposed. The analysis shows that the deformation control requirements and risk warning standards of the expansive soil slope in the Middle Route of South-to-North Water Diversion Project are basically reasonable and the deformation process of the slope can be reasonably controlled. The cumulative displacement rate method can fully reflect the entire process of slope deformation, and can accurately identify the deformation phase of the slope. It is very practical in early warning of expanded soil slope. Based on the analysis of the monitoring data, the deformation trend and the deformation rule of the slope can be inferred, and the deformation of the slope can be predicted to provide guarantees for the normal running of the central channel of the South-to-North Water Diversion.
引文
[1] 长江水利委员会长江科学院,长江水利委员会长江勘测规划设计研究院,南水北调中线干线工程建设管理局,等.膨胀土(岩)渠坡破坏机理及分析方法研究:国家“十一五”科技支撑课题-膨胀土地段渠道破坏机理及处理技术研究-专题二研究报告[R].郑州:河南省水利勘测设计研究有限公司,2010:2.
[2] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑地基基础设计规范:GB50007—2011[S].北京:中国建筑工业出版社,2011:27.
[3] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑边坡工程技术规范:GB50330—2013[S].北京:中国建筑工业出版社,2013:97.
[4] 南水北调中线河南分局.南水北调中线干线工程运行管理规范化建设制度标准汇编[G].郑州:南水北调中线河南分局,2016:47.
[5] 王建民.矿山边坡变形监测数据的高斯过程智能分析与预测[D].太原:太原理工大学,2016:72.
[2] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑地基基础设计规范:GB50007—2011[S].北京:中国建筑工业出版社,2011:27.
[3] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑边坡工程技术规范:GB50330—2013[S].北京:中国建筑工业出版社,2013:97.
[4] 南水北调中线河南分局.南水北调中线干线工程运行管理规范化建设制度标准汇编[G].郑州:南水北调中线河南分局,2016:47.
[5] 王建民.矿山边坡变形监测数据的高斯过程智能分析与预测[D].太原:太原理工大学,2016:72.