Weir dam burst mechanism analysis method for drainage channel excavation measures

An analysis method and drainage channel technology, which are applied in the field of dam drainage channels to achieve the effect of an optimal design scheme

Inactive Publication Date: 2019-04-19
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for analyzing the failure mechanism of a barrier dam with drainage channel excavation measures, which solves the problem of using limited drainage channel excavation measures to reduce the disaster chain effect of barrier dams on downstream cascade reservoir groups

Method used

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  • Weir dam burst mechanism analysis method for drainage channel excavation measures
  • Weir dam burst mechanism analysis method for drainage channel excavation measures
  • Weir dam burst mechanism analysis method for drainage channel excavation measures

Examples

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Embodiment

[0094] Taking the Hongshiyan barrier dam in the Ludian earthquake as an example, the above-mentioned analysis method for the failure mechanism of the barrier dam was used to determine the drainage channel measures to reduce the risk to the downstream cascade reservoirs.

[0095] The Niulan River Hongshiyan dam formed by the "8.03" earthquake in Ludian County, Yunnan Province, the specific data are as follows Figure 4 shown. In the deposits, boulder bodies account for about 10%, those with a block diameter of 30 cm or more account for about 30%, those with a block diameter of 10-30 cm account for about 40%, and those with a block diameter of less than 10 cm account for about 20%. The accumulation medium is uniform from top to bottom. it is good. The damming body is a dense accumulation body, below the 1180m elevation of the upstream water level, the downstream seepage of the damming body is less than 0.5m 3 / s. The Niulan River has abundant water resources and three hydropo...

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Abstract

The invention discloses a weir dam burst mechanism analysis method for drainage channel excavation measures. The method comprises the steps that firstly, existing DB-is analyzed; The IWHR model is improved, and then the accuracy of the analysis method is verified through cases. The method is based on a soil-water coupling mechanism; According to the weir dam burst mechanism analysis method considering drainage channel excavation measures, erosion, breach expansion, hydraulics and reservoir flood regulation models are coupled, the outburst flood peak flow, the overtopping time, the total flooddischarge amount and the risk effect on a downstream cascade reservoir group can be rapidly calculated, and therefore an optimal drainage channel design scheme is obtained.

Description

technical field [0001] The invention belongs to the technical field of dam drainage troughs, and in particular relates to a method for analyzing the dam collapse mechanism of the drainage trough excavation measures. Background technique [0002] Under the action of reservoir water level infiltration or flooding, the barrier dam can easily form a chain of disasters and cause downstream floods. The occurrence of barrier dams has great uncertainty, but if timely decision-making and effective emergency measures are taken, the disaster losses caused by them can be reduced. Excavation of drainage channels is the most important engineering measure in emergency rescue of barrier dams. Reasonable excavation of the drainage channel can ensure the orderly discharge of the barrier dam, and through the scour during the discharge process, the drainage channel will be gradually washed away, so that the water level of the barrier dam will be gradually reduced to a risk-free or low-risk lev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/06G06Q50/26E02B1/00
CPCE02B1/00G06F30/13G06F30/20G06F2119/06G06Q10/0635G06Q10/0637G06Q50/26Y02A10/40
Inventor 王琳李炎隆李守义张晓飞薛一峰司政
Owner XIAN UNIV OF TECH
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