The detection method of diversion risk rate in the early-middle stage of construction of high arch dam

Abstract

The invention relates to water conservancy and hydropower engineering construction diversion risk analysis technology, and discloses a method for detecting the diversion risk rate in the early-middle stage of construction of a high arch dam, which accurately and reasonably quantifies the diversion risk rate in the early-middle stage of construction of a high arch dam. Construction flood safety risk assessment, diversion risk decision-making, distribution, etc. provide important theoretical basis. The method includes the following steps: a. Carrying out a simulation analysis of the water-retaining degree in flood season in the early-middle stage of the construction of the high arch dam, and obtaining the data of the water-retaining degree in the flood season; b. Constructing a mathematical model of diversion risk in the early-middle stage of the construction of the high arch dam; c. Parameter analysis is carried out on the random factors of construction flood and the discharge capacity of diversion tunnel, and the distribution parameters of each random factor are determined; d. Random dynamic simulation of flood control degree and flood level change process is carried out; e. Calculation of flow risk rate; f. Risk identification of diversion tunnel design scheme for high arch dam construction. The invention is suitable for the detection of the diversion risk rate in the early-middle stage of high arch dam construction.

Description

technical field [0001] The invention relates to a diversion risk analysis technology in the construction of water conservancy and hydropower projects, in particular to a method for detecting the diversion risk rate in the early-middle stage of construction of a high arch dam. Background technique [0002] In the process of water conservancy and hydropower project construction, 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 the project construction. However, the construction diversion system, as a risky system, will seriously affect the safety, progress and efficiency of the project itself once a collapse event occurs, and may cause personal injury and property loss to the downstream people. [0003] The construction diversion of high arch dams in the canyon area has unique characteristics. Its flood season stage i...

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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