CN1442582A - Technology of engineering sand control - Google Patents

Abstract

A technique for sand control engineering features that several sand stop rings and linearly arranged, under the action of sand stop rings are fully filled by sand and lifted and so on. As a result, a sand dam is formed on stop the further movement of sand.

Description

Technology of engineering sand control

The present invention relates to a kind of technology of engineering sand control.

It is high and produce effects limitedly that existing engineering sand control technology drops into expense, almost is at a loss what to do for large-scale sandstorm.And planting trees and grass can not prove effective in the desert area of weather very severe, and at present, China's desertification of land scope is still in continuous expansion, and sandstorm weather is also day by day frequent.

The present invention is a kind of technology of engineering sand control with husky sand control, and its principle is: utilize the powerful carrying function of dust storm to build the sediment trapping dam for oneself, thereby final " resolving voluntarily ".

Implementing method of the present invention is: be in-line by some sediment trapping rings and arrange the interception dust storm, the sand of intercepting is built into the sediment trapping dam constantly being filled and promote in the process of sediment trapping ring by sand, as long as dust storm does not stop, the sediment trapping dam can unrestrictedly raise, until finally subduing husky evil spirit, this technology is applied in the stream ground most pronounced effects that takes place frequently.

Below in conjunction with drawings and Examples the present invention is described further:

Description of drawings:

Fig. 1 is a sediment trapping ring expanded view;

Fig. 2 is sediment trapping plane of a loop figure;

Fig. 3 is the sand bar plan view;

Fig. 4 fills sand bar cross-sectional drawing behind the sand for the sediment trapping ring;

Fig. 5 is the sand bar cross-sectional drawing of sediment trapping ring after tripping out;

The sand bar cross-sectional drawing of Fig. 6 after for bulldozer leveling dam crest;

Fig. 7 is a sand bar plan view of establishing double sediment trapping ring;

Fig. 8 is a sand bar cross-sectional drawing of establishing double sediment trapping ring.

Description of symbols in the accompanying drawing:

1. sediment trapping ring; 2. lacing wire ring (reinforcing bar annulus); 3. stud; 4. sediment trapping barrier (geotextile); 5. dust storm; 6. sand bar; 7. sand bar pushes up; 8. slope, windward side; 9. leeward side slope.

As follows for an embodiment:

1. the sediment trapping ring is constructed

Make 10 meters of diameters, encircle high 1.5 meters sediment trapping ring [1] as shown in Figure 1 and Figure 2.Sediment trapping ring [1] is welded into by reinforcing bar annulus [2] and stud [3] and encloses storehouse net sheet, then weaves geotextile as sediment trapping barrier [4] on the net sheet.If 1 kilometer long check dam is built in plan, then need to make [1] 100 on the sediment trapping ring of same size.

2. construction check dam

The sediment trapping ring of making [1] is a straight line arranges, straight line trend and dust storm [5] direction of motion quadrature connect a sediment trapping band of formation implicative of each other (Fig. 3) with sling or bundle silk between the adjacent two sediment trapping rings [1].

Sediment trapping ring [1] has twice sediment trapping barrier, and the first road barrier relies on the outer warehouse sediment trapping of front end, and the sand that is blocked falls to sand bar [6] slope, windward side [8], and the second road barrier relies on warehouse sediment trapping in the rear end, and sand is tackled in sediment trapping ring [1].

Expose in 30 centimetres of studs [3] insertion dam crest sand, to stop the lateral displacement of sediment trapping ring [1] sediment trapping ring [1] bottom.For preventing that dust storm [5] from starting sediment trapping ring [1], also should be at half sediment trapping ring [1] (by windward side [8]) some ballast sandbags of scope side-by-side mounting, and squeeze into the drill rod stake and make sediment trapping ring [1] measure such as " take root ".The all recyclable repeated use of sandbag and drill rod stake, available crowbar of drill rod stake or Chain block pull up.

Deng dust storm [5] sediment trapping ring [1] is filled (Fig. 4) substantially, and after wind weakens, can send many people to go up dam crest [7] and promote sediment trapping ring [1] operation, at first unclamp connection sling between the sediment trapping ring [1], dig out the ballast sandbag and extract the drill rod stake, then concentrate one group of many people, successively each sediment trapping ring [1] is lifted out the sand surface, as promote hard, can excavate the sand of part earlier, promote frictional resistance to reduce near sediment trapping ring wall both sides.Promoting sediment trapping ring [1] is the bigger manual labor of labour intensity, should dispose enough labours, and There is strength in numbers, only makes to promote to feel very not tired, just helps working continuously and improving work efficiency.In addition, it is more even that the many operations of people also can make sediment trapping ring [1] stress point distribute, and can prevent that sediment trapping ring [1] is damaged in lifting process and is out of shape, except that relying on manpower, and also can be simple and mechanical by light-duty Chain block etc.

Be placed in sand bar [6] leeward side slope [9] after sediment trapping ring [1] trips out (Fig. 5) temporarily, then roll and smooth operation by bulldozer.Dam crest [7] after bulldozer leveling and artificial cooperation finishing should keep: sand bar [6] leeward side slope [9] continues to extend by design grade (this example is 1: 2), and wide the keeping in sand bar top [7] designed dam width (this example is 14 meters) constant (Fig. 6).By this routine sand bar top [7] actual rising about 0.8 meter after the bulldozer leveling.

Again sediment trapping ring [1] is laid go back to sand bar top [7] at last, be connected to each other and hang ballast sandbag etc., wait for that next dust storm [5] fills it (Fig. 4) once more, repeat above-mentioned flow process, sand bar [6] will constantly raise and thicken.

As possible, it is also conceivable that above sediment trapping ring central authorities, to support earth work grille net interception dust storm, make more sand enter the sediment trapping ring, to accelerate to build dam speed.

The rising of dam crest [7] is because constantly tackle sand in sediment trapping ring [1] warehouse and promote sediment trapping ring [1], sediment trapping ring [1] just as if one the discontented no Lower Hold of dress is the same forever, the thickening of dam body then mainly is the effect of keeping out the wind by windward side [8] dam body, dust storm [5] chance dam body is obstructed and turns to, so sand falls in flakes, and is deposited in the slope, windward side [8] of dam body.

3. sand bar [6] is stable

The stable of sediment trapping ring [1] is to guarantee the stable key of sand bar [6], from integral body, sediment trapping ring [1] is not to be the paravent of stand-alone, but the large circle whole " lying prone " with 10 rice diameters is in sand bar end face [7], therefore the geometry of sediment trapping ring [1] be help very much homeostatic, as long as sediment trapping ring [1] can be stood fast at all the time in [7] commanding elevation, sand bar top, the sand of sand bar end face [7] has just been drawn a circle to approve by sediment trapping ring [1] so, intrepid more also being difficult to of dust storm [5] finished off with one blow sediment trapping ring [1] together with the sand in the ring, as long as kept the sand of sand bar end face [7], sand bar [6] has just kept, neither can be cut down height, also can lateral transfer not taken place as the sand dune.

4. the smooth dam foundation

If the dam site axis is chosen in rather level areas shape, some little sand dunes are perhaps only arranged, the smooth dam foundation is just fairly simple, adopts artificial or the bulldozer leveling gets final product.

If the dam site axis is chosen in the big sand dune landform that relief alters a great deal, just can only adopt artificial induction's method that dust storm oneself is flattened, method is as follows:

After the axis of dam is determined, at first the sediment trapping ring is placed to big top of sand dune, its objective is and fix this sand dune, neither allow it raise, do not allow it reduce yet, more do not allow it to move again.Between adjacent sand dune, it is the concave relief place, need treat with a certain discrimination in two kinds of situation, first kind of situation is: this concave relief the place ahead (promptly facing the wind to) just having one to flow the sand dune to this lowland migration nearby, if running into this situation just can watch quietly and wait to become, treat its move into give immediately behind this lowland it " attach the names of pre-determined candidates " (the sediment trapping ring promptly is set) fixing, stop it to continue migration again.Second kind of situation is: lowland the place ahead does not have migrating dune can utilize " filling a vacancy ", the sand dune apart from each other that perhaps can fill a vacancy, at this moment just should sediment trapping ring sediment trapping be set at this lowland, by continuous sediment trapping and lifting sediment trapping ring this lowland is progressively raised, the sand bar dam crest is on the same horizontal plane substantially in axis of dam position.

In the process of building a dam afterwards, even bigger fluctuations appears in the sand bar end face, also can be by above-mentioned asynchronous lifting sediment trapping ring technology leveling dam crest.

5. select dam site

Because the sand of building sand bar so dam site should not be selected in dust storm relatively placidity area, and should be sought the area, air port entirely by dust storm self carrying, the active area of drift sand is ideal, and dust storm is frequent more, and the sand bar rate of climb is fast more.

6. sand control at a specified future date

Build successfully after the first road check dam, just can be leeward to carrying out biological sand control engineering at sand bar, as planting trees and grass etc., from then on needn't worry the invasion of dust storm again.

The continuous expansion of stopping husky evil spirit only is the first step that whole sand control engineering is finished, and just should consider that subsequently next step innerland to the desert marches, turn the tables on the attackers, to the strategic point, desert, build more check dams with the desert one one separated.At this moment may run into a problem: if when building the first road check dam, there not be to reserve the passage that can supply to pass through sand bar, that will be a very der Hammer, must consider at interval when check dam is built in planning that therefore suitably distance set in advance the dam passage.

7. the check dam Master Cost calculates

Building 10 meters check dams needs 1 sediment trapping ring and 5 drill rod stakes, and its reinforcing bar material is calculated as follows table:

Title	Bar diameter (mm)	Single length (m)	Radical	Length overall (m)	Unit weight (Kg/m)	Gross weight (Kg)
							Reinforced steel bar ring	????￠12	????31.5	????6	????189	??0.888	??167.8
Stud	????￠12	????1.8	????105	????189	??0.888	??167.8
							The drill rod stake	????￠25	????2	????5	????10	??3.85	??38.5
Amount to:						??374.1

Build the costimating of 10 meters check dam material requesteds:

Title material	Unit	Quantity	Unit price	Multiple valency (unit)
					Reinforcing bar	????Kg	???374.1	????2.5	???935.3
Geotextile	????m2	???47.3	????10	???473
					The ballast sandbag	Individual	???20	????1	???20
Amount to:				???1428.3

Disregarding under the prerequisite of artificial, bulldozer machinery expenses, build 10 meters check dams and need 1500 yuan of engineering material expenses approximately, as build 1 kilometer check dam and then only need 150,000 yuan of cost of materials.

Supplementary notes a bit in addition: because the sediment trapping ring is circular, and the ring ring that is arranged in rows links to each other, the circumference of sediment trapping ring (being manufacturing materials quantity), be the pi value with the ratio weighing apparatus of the diameter of sediment trapping ring (being that sand bar is built length), this explanation: no matter how many sediment trapping ring diameters is, always need 3.14 metric systems to make sediment trapping ring material quantity and could build 1 meter sand bar, thus when selecting sediment trapping ring diameter size as long as consider its function of use, and whether save material and have no relation.

8. double sediment trapping ring scheme

If want to build the check dam of dam crest broad, also can adopt double-row type sediment trapping ring, divide to be listed in the dam crest both sides, as Fig. 7, shown in Figure 8, this also is a kind of good selection, will double but build the dam cost.

Be willing to that this sand control new technology can remove misery for the numerous common people that are subjected to dust storm infringement deeply, and recapture the home of being annexed by the desert.

Claims (3)

1. an employing is with the technology of engineering sand control of husky desertification control method, be to be arranged in order the interception dust storm of embarking on journey by some sediment trapping rings [1], and the sand of intercepting is built into check dam [6] by promoting sediment trapping ring [1], it is characterized in that: described sediment trapping ring [1] is a kind of uncovered of going up, the warehouse that encloses that does not have the end down, described check dam dam crest [7] are progressively to raise behind the sand that constantly obtains sediment trapping ring [1] interception.

2. be a kind of warehouse that encloses according to the described sediment trapping ring of claim 1. [1], it is characterized in that: constitute by at least 2 lacing wire rings [2] and some studs [3] that intersects with it.

3. according to the described sediment trapping ring of claim 1.2. [1], it is characterized in that: sediment trapping barrier [4] is attached on the grid of being made up of lacing wire ring [2] and stud [3].

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