Method for detecting the risk rate of high arch dam construction in the early-middle period

Abstract

The invention relates to the diversion risk analysis technology of construction of hydraulic and hydroelectric engineering, and discloses a method for detecting the risk rate of high arch dam construction in the early-middle period, which features that the risk rate of high arch dam construction in the early-middle period is accurately and reasonably quantify, and the risk rate of high arch dam construction in the early-middle period is quantified to provide important theoretical basis for safety risk assessment, decision-making and distribution of diversion risk in flood season. The method includes the following steps: a, carrying out simulation analysis of the mid-term flood retardation and obtaining the data of the flood retardation; b, performing construction of a high arch dam mathematical model of medium-term diversion risk; c, carrying out parameter analysis on random factor of construction flood and diversion tunnel discharge capacity, and determining distribution parameters ofeach random factor; d, carrying out random dynamic simulation of flood level change process during flood control and flood season; e, carrying out calculation of the early-medium-term diversion riskrate of the high arch dam; f, conducting risk identification of diversion tunnel design scheme for high arch dam construction. The method is applicable to detection of the early-medium-term diversionrisk rate of the construction of the high arch dam.

Description

technical field [0001] The invention relates to a water conservancy and hydropower project construction diversion risk analysis technology, in particular to a method for detecting diversion risk rate in the early-middle stage of high arch dam construction. Background technique [0002] In the construction process of water conservancy and hydropower projects, construction diversion is one of the key links throughout the whole process of water conservancy and hydropower project construction. The power generation period of the unit, etc., affects the whole process of project construction. However, as a risky system, the construction diversion system will seriously affect the safety, progress and efficiency of the project itself, and may cause personal injury and property loss to the people downstream. [0003] The construction diversion of high arch dams in the canyon area has unique characteristics. The flood season stage is generally divided into initial diversion, mid-term ...

AI Technical Summary

Problems solved by technology

These models mainly explore the risk of water retention and flood protection in the initial stage of hydropower project construction, but it is difficult to fully reflect the diversion risk during the entire construction period

With the construction of high dam and large reservoir hydropower projects, the water retaining risk model of high rockfill dams established by Humberto [2013], Zhang Chao [2014] and Liu Lian [2016] takes into account the change of dam filling elevation , but the construction mechanism of high rockfill dams is completely different from that of high arch dams, so it is difficult to apply to the construction diversion of high arch dams; Li Zongkun et al. [2015] constructed a flood risk model during the construction period of earth-rockfill dams, which took into account the construction progress randomness, but the random parameters of the construction schedule are highly subjective, and it is difficult to get close to the actual engineering

[0005] It can be seen that in the current existing research, the risk model can only reflect the risk of water retention and flood control in the initial diversion stage, thereby isolating the initial and mid-term diversion stages of construction, or cannot reflect the construction mechanism of high arch dams and the actual pouring process of the dam body , the risk model and analysis methods are difficult to meet the needs of high arch dam construction risk rate detection

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