CN2721710Y

CN2721710Y - Dam with small sluice holes for river reservoir

Info

Publication number: CN2721710Y
Application number: CN 200420004136
Authority: CN
Inventors: 于明
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-16
Filing date: 2004-02-16
Publication date: 2005-08-31
Anticipated expiration: 2014-02-16

Abstract

The utility model discloses a dam with small sluice holes for river reservoirs, which is suitable for building reservoir dams of the rivers. The dam with small sluice holes for river reservoirs solves the serious problem of sediment of building reservoirs on the rivers, improves reservoir service life, and implements the sustainable development of the water conservancy and power dam projects. The utility model is characterized in that the dam body (1) of the river dam is designed with a plurality of small sluice holes (2) which are used for drainage and sand discharging; the floating sand and mud in the rivers are discharged uniformly from the small sluice holes (2). The utility model has good functions of drainage and sand discharging, reduces the sediment of reservoir dam upper reaches and storage capacity, avoids shortening service life and flood fight danger because of sediment of the fixing dam with bad sand discharging effect, prevents the ecological from damaging, and prevents river channels from changing, etc.

Description

The permeable dam of rivers reservoir small holes dam body

Technical field

The utility model relates to the permeable dam of a kind of hydraulic structure rivers reservoir small holes dam body.

Technical background

At present, the rivers reservoir dam of being built in the world, though designed the lock hole of various not same-actions, with regard to its dam body, all true body dead dam.Because the entity dead dam has the anxious poly-characteristics that block water, make fluviatic silt produce deposition, though designed big shape row Sha Zha hole, the husky effect of the row in the row Sha Zha hole of these big shapes is unsatisfactory, still have a large amount of silt alluvial storage capacity, seriously influence the application life of reservoir.A lot of reservoirs have spent huge investment, and the light construction just needs the more than ten years, and build up back operation as many as decades about 100 years and scrap, and cause heavy economic losses.Moreover, also will produce the rivers serious adverse consequences such as critical, ecological disruption that change its course, control flood.Particularly for the big shape reservoir dam on the big shape rivers, its consequence is just more serious.Therefore, how to prevent that the alluvial of rivers reservoir dam upstream from being the great difficult problem on the water resources and hydropower construction.Small holes dam body dam proposes in order to address this problem.

The utility model content

The purpose of this utility model is to provide a kind of permeable dam of building of small holes dam body that prevents the silt alluvial on rivers.Promptly on the dam body of dam, design several small holes, form the permeable dam body of small holes, row is husky by the small holes earial drainage, promptly do not influence all other indexs such as dam retaining, can reach good row's sand again and subtract the silt effect, thereby avoided the reservoir capacity alluvial, improved the application life of dam, realized the sustainable use of reservoir dam engineering.

The technical solution of the utility model is: the permeable dam of rivers reservoir small holes dam body, form by dam body and small holes, and on dam body, be provided with some small holes.

Described small holes cavity entrance shape is circular or square, and the small holes section adopts uniform section or adopts the gradual change divergent contour.

Described dam body bottom small holes diameter is greater than upper strata small holes diameter.

Several small holes of design promptly form the permeable dam body of the good small holes of permeability on the dam body of rivers dam, and are husky by these small holes earial drainages row on the dam body, reached best row's sand and subtracted the silt effect, realized the sustainable use of reservoir.Simultaneously, critical, all adverse consequences such as rivers change its course, ecological disruption of flood control of bringing because of alluvial have been avoided.The design position of small holes is typically chosen in the middle and lower part of dam dam body, until dam bottom, because a large amount of silt is all in the middle lower floor of current.Do not influencing under the situation of dam retaining and other operating index, the design total flow of its small holes should be not more than poor with discharge such as minimum discharge in the rivers river course in dry season for many years and generating, irrigation, industry, population.If total vent flow of small holes is already used the poor of discharge greater than the minimum discharge in the dry season rivers river course and each, will influence normal retaining and all other utilization indexs of reservoir.The section of small holes can adopt uniform section, also can select divergent contour gradual change form of fracture, as: " loudspeaker " type.Stop up hole to avoid silt to block.The equal diameter that promptly can adopt the diameter of small holes also can adopt the change diameter.That is: the small holes diameter of dam dam body bottom can be more greatly, and the small holes diameter on upper strata can be littler, and this is that size owing to the particle diameter of the silt in different water layers determines.The size of small holes cross dimensions is to decide according to the size of sediment grain size in the rivers river course, and the minimum diameter of hole is not less than 3～5 times of maximum sediment grain size in the river course, can pass through smoothly to guarantee silt.

Description of drawings

Fig. 1 rivers reservoir small holes dam body transverse view;

Fig. 2 rivers reservoir small holes dam body longitudinal section.

The specific embodiment

The utility model rivers reservoir small holes dam body dam is made up of dam body 1 and several small holes 2.Its specific implementation method is: when concreting dam dam body, small holes internal mold (adopt steel pipe or plastic pipe) is fixed in the mould of the dam body of being built, concreting dam body then is so just formed small holes dam body dam.

The utility model rivers reservoir small holes dam body dam is useful on the reservoir of building on the rivers, has solved the biggest problem of reservoir sedimentation, has improved the application life of reservoir, has realized the reservoir engineering sustainable use.

Claims

1, the permeable dam of a kind of rivers reservoir small holes dam body is characterized in that: be made up of dam body (1) and small holes (2), be provided with some small holes (2) on dam body (1).

2, the permeable dam of rivers reservoir small holes dam body according to claim 1 is characterized in that: described small holes cavity entrance shape is for circular or square, and the small holes section adopts uniform section or adopts the gradual change divergent contour.

3, the permeable dam of rivers reservoir small holes dam body according to claim 1 is characterized in that: described dam body bottom small holes diameter is greater than upper strata small holes diameter.