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Dam drainage structure

A dam and water retreat technology, which is applied in water conservancy projects, sea area projects, coastline protection, etc., can solve the problems of large amount of excavation and support, high cost, and high cost of horizontal tunnel excavation, so as to reduce the amount of tunnel excavation and reduce engineering costs. The effect of cost saving and excavation cost saving

Inactive Publication Date: 2014-01-22
POWERCHINA ZHONGNAN ENG
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Problems solved by technology

In this way, it is necessary to excavate tunnels across the dam at both the upper and lower ends of the dam, and the excavation of the tunnels should be designed according to the field environment such as terrain and river courses, which will occupy a certain terrain and river courses, and the excavation volume of the transverse tunnels and its Large amount of support, high cost, high cost

Method used

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Embodiment Construction

[0021] see figure 1 with figure 2 , the dam discharge structure includes a discharge surface hole 1 on the top of the dam, a discharge surface hole gate well 6, a vent bottom hole 2 at the bottom of the dam, a vent bottom hole gate well 3, and a gate well 3 communicating with the vent bottom hole Bottom retreat tunnel 4 ; a shaft 5 vertically passing through the bottom retreat tunnel 4 is provided downstream of the bottom retreat tunnel 4 , and the shaft 5 communicates with the gate well 6 of the discharge surface hole.

[0022] A water cushion pond 7 is provided at the bottom of the shaft 5 .

[0023] The depth of the water cushion pond 7 is 10% of the elevation difference between the upstream water level of the dam and the water cushion pond 7.

[0024] The connection section between the vertical shaft 5 and the downstream water outlet of the bottom retreat tunnel 4 is a pressure slope section 8 .

[0025] Taking a certain reservoir as an example, the flood discharge flo...

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Abstract

The invention discloses a dam drainage structure which comprises a surface drainage hole, a surface drainage hole gate well, a bottom evacuation hole, a bottom evacuation hole gate well and a bottom water reflow tunnel. The surface drainage hole and the surface drainage hole gate well are formed in the upper portion of a dam, the bottom evacuation hole and the bottom evacuation hole gate well are formed at the bottom of the dam, and the bottom water reflow tunnel is communicated with the bottom evacuation hole gate well. A vertical well penetrating the bottom water reflow tunnel vertically is formed at the downstream of the bottom water reflow tunnel, and the vertical shaft is communicated with the surface drainage hole. By sufficiently utilizing limited building arrangement space, flood drainage and evacuation are realized; the surface drainage hole and the bottom evacuation hole share the same water reflow tunnel, so that the drainage structures of the surface drainage hole and the bottom evacuation hole do not have to be arranged separately, and excavating workload, supporting workload and occupation space are reduced.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower, and in particular relates to a dam discharge structure combining a flood discharge surface hole and an empty bottom hole. Background technique [0002] In water conservancy and hydropower projects, in order to ensure the safety of the dam, flood discharge holes are often used to vent the flood. In exceptional cases, it is also necessary to arrange a vent hole to realize the functions of venting and maintenance. [0003] In traditional dams, the discharge structure of the flood discharge surface hole and the discharge structure of the vent bottom hole are generally arranged separately, that is, the discharge surface hole is connected with the retreat tunnel at the upper end of the dam, and the vent bottom hole is connected with the retreat tunnel at the bottom of the dam. In this way, it is necessary to excavate tunnels across the dam at both the upper and lower ends of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
Inventor 刘昊胡娟朱友军陈刚王小平
Owner POWERCHINA ZHONGNAN ENG
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