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Transformation structure and method of dam foundation draining hole of dam of hydroelectric station

A technology for reconstructing structures and drainage holes, which is applied in infrastructure engineering, construction, protection devices, etc., and can solve problems such as calcification and precipitate blockage, and achieve the effects of simple structure, large drainage, and prevention of hole collapse

Pending Publication Date: 2018-01-23
GUIZHOU WUJIANG HYDROPOWER DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to provide a hydropower station dam foundation drainage hole reconstruction structure and method to solve the problem of calcification and precipitate blockage during the long-term operation of the existing dam foundation drainage method, reduce the dam foundation uplift pressure, Ensuring the stable operation and safety of the dam

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  • Transformation structure and method of dam foundation draining hole of dam of hydroelectric station

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:

[0024] refer to figure 1 , a hydroelectric power station dam foundation drainage hole transformation structure of the present invention, comprising a drainage ditch 1 and a drainage hole, an auxiliary drainage hole 2 is arranged next to the drainage hole whose base lift pressure is greater than the design value, and its depth is 4.5-7m, wherein the downstream row The direction of the secondary drainage hole 2 is inclined to the upstream by 10°, and a drainage blind material is arranged in the drainage hole and the secondary drainage hole 2, and the drainage blind material is composed of a drainage filter element and a geotextile filter membrane wrapped outside.

[0025] The reconstruction method for the drainage hole of the existing hydropower station dam foundation is as follows:

[0026] (1) Use the uplift pressure gauge to measure the uplift pressure at each...

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Abstract

The invention discloses a transformation structure and method of a dam foundation draining hole of a dam of a hydroelectric station. The transformation method of the dam foundation draining hole of the dam of the hydroelectric station comprises the following steps that (1) the foundation uplift pressure at the position of the dam foundation draining hole is measured; (2) when the foundation upliftpressure is larger than a design value, a groove is carved in original concrete in the axial direction of an original horizontal draining pipe, and the original horizontal draining pipe is disassembled; (3) backfilling is conducted on the carved groove with cement mortar, plastering is conducted on the two sides and the bottom of the groove with cement mortar, and a drainage ditch is formed; (4)hole bottom cleaning treatment is conducted on the original draining hole; (5) an auxiliary draining hole is additionally arranged at the position where the foundation uplift pressure is larger than adesigned value, a t-branch pipe is installed at an opening of the upper end of the auxiliary draining hole, an end cap is arranged at an upper end opening of the t-branch pipe, and the other end opening of the t-branch pipe is connected with the drainage ditch through a pipeline. According to the transformation structure and method of the dam foundation draining hole of the dam of the hydroelectric station, an existing dam foundation draining hole is transformed, especially the auxiliary draining hole is additionally arranged beside a blocked draining hole, so that the blockage problem of vadose water is effectively solved, the dam foundation uplift pressure is reduced, and stable operation and safety of the dam are guaranteed.

Description

technical field [0001] The invention relates to a hydropower station dam foundation drainage hole reconstruction structure and method, and belongs to the technical field of hydropower station dam foundation reconstruction. Background technique [0002] Guizhou Suofengying Hydropower Station is located in the power load center in the hinterland of central Guizhou. The main task of the project is to generate electricity, undertake tasks such as peak regulation, frequency regulation, and emergency backup, and also have benefits such as irrigation, breeding, and tourism. The installed capacity of the power station is 600MW, the guaranteed output is 466.9MW, the annual average power generation is 2.011 billion kw.h, and the annual utilization hours are 3352h. [0003] The foundation rock of Suofengying Dam is the Yulongshan Limestone of the Lower Triassic Liquid Lang Formation, which is hard and complete. The strike of the rock strata is NE and crosses the valley and dips upstrea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D31/12E02D19/06
Inventor 杨先艾唐英杨玲李太清
Owner GUIZHOU WUJIANG HYDROPOWER DEV
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