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Construction method of narrow interception advancing closure under high hydraulic indexes

A construction method and high hydraulic technology, applied in dams, barrages, weirs, etc., can solve problems such as unsatisfactory diversion conditions and difficulty in interception, reduce the loss of throwing materials, ensure construction progress, and improve social benefits. Effect

Inactive Publication Date: 2010-09-29
SINOHYDRO BUREAU 5
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  • Abstract
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Problems solved by technology

[0002] As the conditions for hydropower development become worse and worse, limited by many factors such as terrain, construction site, and construction diversion, especially for diversion-type hydropower stations, the construction period of the first project is a non-controlling project, and most of them use cofferdams to retain water during dry periods , foundation pit construction, cofferdam water passage scheme in flood season, so the cofferdam body is relatively thin, and single-hole diversion is often used for diversion, and the diversion conditions are not ideal. Narrow closure is used to enter Zhanlong, but the closure can be implemented smoothly under the conditions of large flow, high flow velocity, complex flow state, canyon location, high strength, deep water, narrow site, no storage yard in the construction area, and prominent safety hazards. , the interception is very difficult, how to achieve a safe and smooth confluence under these circumstances, there is no good way at present

Method used

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  • Construction method of narrow interception advancing closure under high hydraulic indexes
  • Construction method of narrow interception advancing closure under high hydraulic indexes
  • Construction method of narrow interception advancing closure under high hydraulic indexes

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Embodiment Construction

[0012] In order to make the present invention easier to understand, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] The research on the key elements of closure design is limited by many factors such as terrain, construction site, and construction diversion. Under the condition of high hydraulic index, the closure of a large river in a secondary hydropower station can only adopt narrow closure, single closure, and one-way entry and closure. To ensure the smooth closure of the river, it is necessary to conduct hydraulic model experiments on the closure construction first, and at the same time conduct research on the key elements of closure according to the actual boundary conditions. Due to the limitations of the model experiments, it is impossible to fully simulate the actual terrain, construction layout, throw-fill technology, On-site hydrological conditions and construction boundaries...

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Abstract

The invention discloses a construction method of narrow interception advancing closure under high hydraulic indexes. By researching key design elements of narrow banquettes, establishing corresponding implementation measures and implementing interception key technology, the method can realize safe and smooth confluence under the conditions of large flow capacity, high flow rate, complex flow state, valley zones, high strength, deep water, narrow sites, construction areas without material storing fields, obvious potential safety hazards and large interception difficulty. The invention ensures the construction progress of the main engineering, enables the constructions to safely go through the flood period, widens the application range of narrow interception construction under high hydraulic indexes, saves the engineering cost, and obtains good social effect.

Description

technical field [0001] The technical field of the present invention is the construction field of diversion and interception of hydropower projects, and in particular relates to a construction method for narrow closure and interception under high hydraulic index. Background technique [0002] As the conditions for hydropower development become worse and worse, limited by many factors such as terrain, construction site, and construction diversion, especially for diversion-type hydropower stations, the construction period of the first project is a non-controlling project, and most of them use cofferdams to retain water during dry periods , foundation pit construction, cofferdam water passage scheme in flood season, so the cofferdam body is relatively thin, and single-hole diversion is often used for diversion, and the diversion conditions are not ideal. Narrow closure is used to enter Zhanlong, but the closure can be implemented smoothly under the conditions of large flow, high...

Claims

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Application Information

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IPC IPC(8): E02B7/04E02B7/06
Inventor 常明云赵玉任俊友舒向东
Owner SINOHYDRO BUREAU 5
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