Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof

A disposal method and artificial technology, applied in artificial waterways, water conservancy projects, sea area projects, etc., can solve the problems of reducing the risk of barrier lakes, the difficulty of discharge flow, and low discharge efficiency, so as to improve emergency discharge efficiency, rapid discharge, The effect of reducing losses

Inactive Publication Date: 2010-06-02
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, and for the dammed lake of the gravel-soil type dammed dam, it is easy to appear "the initial discharge efficiency is low, and the later discharge flow rate is too large and difficult to control" when draining the reservoir water. In order to

Method used

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  • Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof
  • Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof
  • Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof

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Embodiment 1

[0031] Such as figure 1 , image 3 , Figure 5 , Figure 6 shown. The vertical direction of the dam body of a dammed lake is generally low in the middle and high on both sides, lying on the main river in the shape of a drum and mound. 1.5 million m 3 , the maximum storage capacity is 9 million m 3 . Barrier dams are mainly composed of crushed stone soil, with boulders distributed on the surface; boulders with a diameter of 1-3m, the largest diameter can reach more than 10 m, accounting for 20%; crushed stones with a diameter of 0.1-0.5m, accounting for 70%; Trail soil accounts for 10%; the lithology of boulders and crushed stones is mainly dolomite and dolomitic limestone, and the rock quality is hard. The catchment area of ​​the barrier lake is 158km 2 , according to the observation data of the adjacent hydrological station, it is estimated that the peak discharge of the 5-year flood is 400m 3 / s, 20-year flood peak discharge is 520m 3 / s, the flood peak discharge o...

Embodiment 2

[0036] Such as figure 2 , Figure 4 , Figure 6 shown. The vertical direction of the dam body of a dammed lake is generally low in the middle and high on both sides, lying on the main river in the shape of a drum and mound. 20 million m 3 , the maximum storage capacity is 320 million m 3 . The dam body is composed of cataclysmic rock formed by bedrock extrusion or disintegration, residual slope gravel soil, and silt-containing fine sand deposited in the Kuzhuba reservoir area; boulders are distributed on the surface, and the diameter of the boulders is 1-3m, the largest The diameter can reach more than 10 m. The upstream side slope of the barrier dam is relatively gentle, with a slope of 20°; the upper and lower parts of the downstream side slope are steep slopes, and the middle part is a gentle slope. 20m, slope ratio 1:0.5. The catchment area of ​​the barrier lake is 3550km 2 , according to the observation data of the adjacent hydrological station, it is estimated ...

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Abstract

The invention discloses a disposal method of Barrier Lake for artificially regulating and controlling the drain flow and an application thereof. The method comprises the following steps of: digging a draining guide slot at the part of a relatively low-lying groove on a dam body of a barrier lake; in the draining intermediate stage of a Barrier Lake reservoir, carrying out artificial explosions or mechanical clearing on huge stones influencing downward erosion development in the draining guide slot so as to guarantee the stable growth of the down cutting flow; and in the draining later stage of the Barrier Lake reservoir, when the reservoir water drain flow in the draining guide slot reaches a set threshold value, putting an artificial structural body into the draining guide slot to stabilize a slot bed so as to control the quick down cutting of the slot bed and play a role of flow control. Compared with the prior art, the invention can avoid the phenomena that the draining efficiency in the initial stage is low, and the draining in the later stage is too quick and difficult to control, which are easy to appear when a conventional method is used for disposing the Barrier Lake, thus the invention greatly improves the emergency draining efficiency of the Barrier Lake and quickly reduces the risks of the Barrier Lake so as to greatly reduce the loss of an upstream flooding area and the risks of a downstream risk area.

Description

technical field [0001] The invention relates to a disaster reduction technology for barrier lake disposal, in particular to a barrier lake disposal method for artificially regulating discharge flow and its application. Background technique [0002] Barrier lakes are a natural landform phenomenon, including landslides caused by earthquakes, moraine lakes formed by glaciers blocking channels, etc. When there are human activities downstream, the floods caused by their collapse will seriously threaten people's lives and Property security restricts the development of the national economy in the vast mountainous areas of the country. [0003] On May 12, 2008, the Wenchuan Earthquake triggered a large number of barrier lakes between the Longmenshan Front Mountain fault zone and the Back Mountain fault zone and adjacent areas, the most notable of which is the Tangjiashan barrier lake in Beichuan County. Disposal results of several large-scale barrier lakes, such as Tangjiashan barr...

Claims

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Application Information

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IPC IPC(8): E02B5/02E02B7/16
Inventor 陈晓清崔鹏游勇李德基赵万玉高全黄凯
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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