CN2856164Y

CN2856164Y - Sand blocking net

Info

Publication number: CN2856164Y
Application number: CN 200520022107
Authority: CN
Inventors: 王玉昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-08
Filing date: 2005-12-08
Publication date: 2007-01-10
Anticipated expiration: 2015-12-08

Abstract

The utility model relates to a sand-withholding device for solving the problems in the existing technology (e.g., stone dam) for preventing river from changing its way such as high production cost, high labor load and easy damage. The sand-withholding device comprises a horizontal net (1) and a vertical net (2) perpendicular to and connected with each other, net wires (3) interconnected with the horizontal net (1) and vertical net (2) to form a net surface (5), and flow-regulating ports (4) arranged on the net surface. The utility model has advantages of simple structure, easy operation, low cost, suitability for sand-withholding, sand-fixing and sand content regulating. The utility model can be built in various rivers.

Description

Sand blocking net

Technical field

The utility model relates to a kind of sand blocking device.

Background technology

Rivers change its course, and it is arranged from ancient times.The soil erosion aggravation that rivers change its course and make two sides, channel aggradation, millions of, ten million meter of the expense that is used for the rivers dredging every year.The inland river is also easy to handle, and the situation in boundary river is just different.With Heilungkiang is example: Heilungkiang is the tenth-largest river, the world, now in the basin vegetation deterioration, wetland atrophy, tributary in length and breadth, main channel is constantly to a Chinese side roll, the territory large tracts of land runs off.It is inseparable with the Global Climate variation tracing it to its cause, and mainly is to be subjected to due to greenhouse effect and desertification of area, middle north Asia and the ecological chain destruction.Thereby cause arid, flood phenomenon in the basin constantly to occur.Be subjected to its drought impact, along the river the death of vegetation large tracts of land is surfaced at the bottom of the river for a long time, makes vegetation growth lack of standardization, and island constantly occurs, and the riverbed can't be stablized.Over-exploitation in addition, overgraze, the excessively reclamation of wasteland make ground exposed.China is in the southern bank in Heilungkiang, and vegetation is in shady spot along the river, and the root system of vegetation is undeveloped, a little less than the energy for growth, can only lean on the silt river bank to come to water.The river bank of shady spot freeze dark and thaw slow, when spring flood arrives, in thawing just, between frost free period silt can't in conjunction with, so river is just taken away silt easily.Slow because of thawing simultaneously, cause the stressed by force of the warm layer in bottom, riverbed, thereby empty the riverbed, cause river bank large tracts of land landslide.Here it is main channel also is the many main causes at northern bank of Hetao Plain constantly to the main cause of a Chinese side roll.The existing branch of administering prevents that rivers from changing its course, and generally the way of Cai Yonging is that quarrying is built a dam, and quarrying builds a dam not only will expend lot of manpower and material resources, and hundreds and thousands of ten thousand yuan fund also will be born the sorrow of damaged or destroyed by flood.

The utility model content

The purpose of this utility model is to administer branch for solving to have now, prevents that rivers from changing its course, and generally the way of Cai Yonging is that quarrying is built a dam, quarrying is built a dam and not only will be expended lot of manpower and material resources, hundreds and thousands of ten thousand yuan fund also will be born the problem of the sorrow of damaged or destroyed by flood, and a kind of sand blocking net is provided.The utlity model has simple in structurely, workable, with low cost, be fit to various river basins and cut sand, fix the sand, prevent the characteristics that rivers change its course.The utility model is made up of bottom board concrete steel 1, vertical net 2 and netting twine 3; Bottom board concrete steel 1 links together with vertical net 2 mutual vertical fixing, and netting twine 3 is fixed on across mutually and forms wire side 5 on bottom board concrete steel 1 and the vertical net 2, and wire side 5 is provided with flow and adjusts the mouth of a river 4.Using method of the present utility model is: the utility model is fixed on the cross section, riverbed apart from tributary silt place (general big sprout all has the characteristics that silt suitable for reading is big, the end opening silt is little) any place of downstream one to five km, the bottom of sand blocking net and the bottom connection in riverbed touch, the upper height of sand blocking net will be higher than the height of the peak level of this hydraulic condition of river record, and the two ends of sand blocking net are embedded in the riverbank of both sides, riverbed.The mechanism of action of the present utility model is: moving according to hydrodynamic(al) sand, water is walked the capable rule of sand and is constantly changed the active force of fluid to the different specific weight object, pretending firmly alluviation down, under weak force, deposit, principle in quiet active force deposit, on the cross section, riverbed at any place of one to five km, downstream, silt place, distance tributary, fix sand blocking net, on the basis of dependable flow, form local current stabilization relatively, make big grain cobble can't continue to move ahead, sand blocking net stops large-scale drift simultaneously, make a large amount of silts before and after sand blocking net, be deposited, last silt buries sand blocking net and deposits gradually and is the level land, this section tributary is promptly stopped, and has finished the cutout in a tributary and has administered.The beneficial effects of the utility model are: structure is simple especially, workable, with low cost, not only be fit to various river basins and cut sand, solid sand, but also can be used to transfer sand (certain distance is left in the bottom of sand blocking net and the bottom in riverbed), change its course to prevent rivers.Construct with traditional method and be difficult in some bigger tributary, no matter and use the utility model water to have many dark, waters surface to have how wide (water surface width surpasses 100 meters, the fixed network of need driving piles in the riverbed), current to have and manyly suddenly all can construct simultaneously on a large scale.Little, the instant effect of difficulty is not subjected to water level limitation, and the saving fund does not have the sorrow of damaged or destroyed by flood.The expense of using the utility model to administer rivers is about one of percentage of conventional method.Sprout can deposit and be the level land in 2～3 years in general, and bigger tributary can reach cutout in 5～8 years and administer.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model, and Fig. 2 is the structural representation of the specific embodiment two.

The specific embodiment

The specific embodiment one: (referring to Fig. 1, Fig. 2) present embodiment is made up of bottom board concrete steel 1, vertical net 2 and netting twine 3; Bottom board concrete steel 1 links together with vertical net 2 mutual vertical fixing, and netting twine 3 is fixed on across mutually and forms wire side 5 on bottom board concrete steel 1 and the vertical net 2, and wire side 5 is provided with flow and adjusts the mouth of a river 4.The bottom board concrete steel 1 of present embodiment and the diameter of vertical net 2 are 0.6～1cm, and bottom board concrete steel 1 and vertical net 2 are made by stranded galvanized steel or nylon rope.The diameter of netting twine 3 is 2～5mm, and netting twine 3 is made by zinc-coated wire or nylon wire.The length of wire side 5 is 30～1000 meters.

The specific embodiment two: (referring to Fig. 2) present embodiment wire side 5 is provided with three flows and adjusts the mouth of a river 4.The area of the mesh 6 that forms between netting twine 3 and the netting twine 3 is 9～100cm ²

Claims

1, a kind of sand blocking net, it is made up of bottom board concrete steel (1), vertical net (2) and netting twine (3); It is characterized in that the mutual vertical fixing of bottom board concrete steel (1) and vertical net (2) links together, netting twine (3) is fixed on bottom board concrete steel (1) mutually across and vertical net (2) is gone up formation wire side (5), and wire side (5) is provided with flow and adjusts the mouth of a river (4).

2, sand blocking net according to claim 1 is characterized in that the diameter of bottom board concrete steel (1) and vertical net (2) is 0.6～1cm.

3, sand blocking net according to claim 1, the diameter that it is characterized in that netting twine (3) is 2～5mm.

4, sand blocking net according to claim 1, the length that it is characterized in that wire side (5) is 30～1000 meters.

5, sand blocking net according to claim 1 is characterized in that wire side (5) is provided with three flows and adjusts the mouth of a river (4).

6, sand blocking net according to claim 1 is characterized in that the area of the mesh (6) of formation between netting twine (3) and the netting twine (3) is 9～100cm ²