Method for lowering seepage line of dam by adopting osyris wightiana guide filtration

A technology for soaking lines and dams, which is applied in water conservancy projects, sea area projects, construction, etc., and can solve problems such as high cost, large amount of engineering, and limited effect

Inactive Publication Date: 2004-11-17
刘燕翊
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  • Claims
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Problems solved by technology

The first four methods have obvious effects on reducing the infiltration line of the dam body and the escape point, but the amount of work is large and the cost is high. Some of them are also limited by the construction environment and time (whether it is in the flood season or not). The last method It is only an emergency measure during the flood season, and the effect is limited.

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  • Method for lowering seepage line of dam by adopting osyris wightiana guide filtration
  • Method for lowering seepage line of dam by adopting osyris wightiana guide filtration
  • Method for lowering seepage line of dam by adopting osyris wightiana guide filtration

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Embodiment Construction

[0014] Similar to the underground piercing machinery such as the QC pneumatic piercing hammer produced in Shanghai and the pneumatic underground piercing machine produced by Hubei Institute of Technology, it is very suitable for piercing the said hole of the present invention on the embankment. The weather is dry in the dry season, and the water content of the embankment soil is small. When the small aperture is formed, the hole is not easy to collapse. This is the best time to adopt the method of the present invention for construction. There are two methods, one is to squeeze the hole with a piercing machine, and when the design depth is reached, immediately withdraw the perforation hammer, and then send the PVC pipe or steel pipe into the hole, and then remove the pipe while entering the sand; the other is When the casing is drilled, the pipe and the hammer advance synchronously. When the design depth is reached, the perforating hammer is immediately withdrawn from the pipe, ...

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Abstract

The method for lowering seepage line of dam body by adopting "sand nail" guide filtration process includes the following steps: digging hole on the slope of foot of dam foundation of back slope of dam body, hole direction is parallel or roughly parallel to water level, diameter of hole is 70-90 mm and its depth is 2-6 m; filling or placing the material in which the water is easily penetrated into the hole to form sand needle, then closing the hole mouth with mixed sand and stone material, restoring external form of dam slope, guiding the water in the dam body into hole mouth and discharging the water into exterior from dam body, distance between nails is 1-1.5m, the sand nails are arranged in single row or two rows mode.

Description

technical field [0001] The invention relates to embankment engineering, in particular to a method for reducing the wetting line of a dam body by adopting sand needle guiding filter in embankment engineering. Background technique [0002] my country is a country that suffers from severe flood disasters. For quite a long period of time, due to deforestation, overgrazing and other environmental damages, the ecological environment around rivers, lakes and seas has been greatly damaged. According to statistics, the frequency of floods in the Yangtze River Basin has changed from every eight Once a year, gradually shortened to once every five years, every two years. There are many types of embankments in my country, which are divided into earth embankments (dams), masonry embankments, earth-rock embankments, reinforced concrete flood walls, etc. according to embankment materials. Among them, the earth embankment accounts for a considerable proportion in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/04E02D19/20
Inventor 刘燕翊
Owner 刘燕翊
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