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Gravitational dam uplift pressure grading early warning method based on measured data
The invention discloses a gravitational dam uplift pressure grading early warning method based on measured data, which approaches actual uplift pressure distribution through a connecting line of measured uplift pressures of two adjacent points, and comprises the following steps: calculating an actual uplift pressure area Mt and a standard uplift pressure area St; comparing the numerical values ofMt and St, if Mt is larger than or equal to St, giving a blue alarm and executing the next step; calculating vertical normal stress and principal stress at the dam heel and the dam toe according to the actually measured uplift pressure, and if any one of the vertical normal stress and the principal stress exceeds the standard requirement, starting a yellow alarm and carrying out the next step; calculating and judging whether the anti-sliding stability safety coefficient and the anti-overturning stability safety coefficient of the gravity dam exceed the design specification requirements or notaccording to the actual measurement data, and if yes, starting red alarm. Early warning is performed according to uplift pressure actual measurement data in combination with specific gravity dam structures and types, dam structures and geological conditions are fully considered, and the grading early warning method has the advantages of simplicity, intuitiveness, clear physical significance, simple calculation and the like.
本发明公开一种基于实测数据的重力坝扬压力分级预警方法，通过相邻两点实测扬压力连线逼近实际扬压力分布，包括如下步骤，计算实际扬压力面积Mt和规范扬压力面积St；比较Mt与St的数值大小，若Mt大于或等于St，则启动蓝色报警并进行下一步骤；根据实测扬压力计算坝踵和坝趾处的垂直正应力和主应力，若有任意一项超过规范要求，则启动黄色报警并进行下一步骤；根据实测数据计算并判断重力坝抗滑稳定安全系数及抗倾覆稳定安全系数是否超出所述设计规范要求，若超出，则启动红色报警；本分级预警方法根据扬压力实测数据结合具体重力坝结构和类型进行预警，充分考虑大坝结构及地质条件，具有简单直观和物理意义明确、计算简单等优点。
Gravitational dam uplift pressure grading early warning method based on measured data
The invention discloses a gravitational dam uplift pressure grading early warning method based on measured data, which approaches actual uplift pressure distribution through a connecting line of measured uplift pressures of two adjacent points, and comprises the following steps: calculating an actual uplift pressure area Mt and a standard uplift pressure area St; comparing the numerical values ofMt and St, if Mt is larger than or equal to St, giving a blue alarm and executing the next step; calculating vertical normal stress and principal stress at the dam heel and the dam toe according to the actually measured uplift pressure, and if any one of the vertical normal stress and the principal stress exceeds the standard requirement, starting a yellow alarm and carrying out the next step; calculating and judging whether the anti-sliding stability safety coefficient and the anti-overturning stability safety coefficient of the gravity dam exceed the design specification requirements or notaccording to the actual measurement data, and if yes, starting red alarm. Early warning is performed according to uplift pressure actual measurement data in combination with specific gravity dam structures and types, dam structures and geological conditions are fully considered, and the grading early warning method has the advantages of simplicity, intuitiveness, clear physical significance, simple calculation and the like.
本发明公开一种基于实测数据的重力坝扬压力分级预警方法，通过相邻两点实测扬压力连线逼近实际扬压力分布，包括如下步骤，计算实际扬压力面积Mt和规范扬压力面积St；比较Mt与St的数值大小，若Mt大于或等于St，则启动蓝色报警并进行下一步骤；根据实测扬压力计算坝踵和坝趾处的垂直正应力和主应力，若有任意一项超过规范要求，则启动黄色报警并进行下一步骤；根据实测数据计算并判断重力坝抗滑稳定安全系数及抗倾覆稳定安全系数是否超出所述设计规范要求，若超出，则启动红色报警；本分级预警方法根据扬压力实测数据结合具体重力坝结构和类型进行预警，充分考虑大坝结构及地质条件，具有简单直观和物理意义明确、计算简单等优点。
Gravitational dam uplift pressure grading early warning method based on measured data
一种基于实测数据的重力坝扬压力分级预警方法
FANG WEIHUA (author)
2020-06-09
Patent
Electronic Resource
Chinese
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