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Karst landform based hydropower station diversion tunnel plugging construction method

A construction method and technology of diversion tunnels, applied in hydropower stations, hydroelectric power generation, water conservancy projects, etc., can solve the problems of narrow construction surface and difficult sealing, and achieve high safety, low construction cost and good sealing effect Effect

Active Publication Date: 2018-08-10
中国能源建设集团广西水电工程局有限公司
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AI Technical Summary

Problems solved by technology

The water in the diversion tunnel is deep and fast, the construction surface is narrow, and there are major safety hazards in the plugging. At the same time, there are many construction problems such as material transportation, temporary drainage, concrete pouring, and the stability of the plug structure. The plugging is extremely difficult.

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  • Karst landform based hydropower station diversion tunnel plugging construction method
  • Karst landform based hydropower station diversion tunnel plugging construction method
  • Karst landform based hydropower station diversion tunnel plugging construction method

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Embodiment Construction

[0061] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0062] see Figure 1-3 , a construction method for plugging diversion tunnels of hydropower stations based on karst landforms, which includes the following steps:

[0063] S1: Design diversion tunnel plugging scheme

[0064] Facing the severe situation of prominent safety hazards in diversion tunnel closure, short construction period, and difficult construction, after in-depth analysis of the overall stability of the diversion tunnel and the change law of flow and velocity in the tunnel, the "clogging in the tunnel is the main, Based on the principle of supplementary anti-seepage outside the tunnel, it was decided to adopt the plugging scheme of temporary plug plus permanent plug. Temporary plug is the most critical part of the entire plugging work, and the construction plan of temporary plug is focused on. The temporary plug section is located at the ...

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Abstract

The invention provides a karst landform based hydropower station diversion tunnel plugging construction method. The karst landform based hydropower station diversion tunnel plugging construction method comprises the following steps of: S1, designing a diversion tunnel plugging scheme, making a principle that takes in-tunnel plugging as the principal thing and takes outside-tunnel seepage-proofingas the auxiliary thing, and adopting a plugging scheme of a temporary plug and a perpetual plug; S2, performing diversion tunnel temporary plug construction; S21: constructing a construction channel and a scaffold working platform; S22: mounting a water baffle steel plate gate; S23: mounting a stop log plate; S24: manufacturing and mounting a water drainage steel tube; S25: pouring concrete of thefirst section of the temporary plug; S26: performing grouting leakage stopping and reinforcing treatment on the first section of the temporary plug; S27: closing a butterfly valve; S28: pouring concrete of a second section of the temporary plug; and S3: constructing the perpetual plug. The hydropower station diversion tunnel plugging construction method can be adopted to effectively guarantee plugging of the diversion tunnel, so that safety of a dam is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of hydraulic engineering construction, and in particular relates to a construction method for plugging diversion tunnels of hydropower stations based on karst landforms. Background technique [0002] The dam site of the Wanjiakouzi Hydropower Station is located on the Gexiang River in the upper reaches of the main stream of the Beipan River. It is the fourth level of hydropower development on the main stream of the Beipan River. The scale of the project is large (2), mainly for power generation. The main buildings are: rolling Concrete arch dam, dam crest overflow surface hole, energy dissipation pad pond, dam body flushing sand hole, water diversion system, ground powerhouse and switch station, etc. [0003] The normal storage level of the reservoir is 1450 m, the dam crest elevation is 1452.50 m, and the maximum dam height is 167.5 m. It is the highest RCC hyperbolic arch dam currently under construction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/02E02B7/20
CPCE02B7/20E02B9/02Y02E10/20Y02P70/50
Inventor 卢山龙利秋黄树鹏罗雄兵班辉周定强黄均华叶纯信蒙飞花
Owner 中国能源建设集团广西水电工程局有限公司
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