CN204139151U - A kind of aquifer recharge device of high efficient block - Google Patents

Abstract

The utility model discloses the aquifer recharge device of a kind high efficient block, belong to aquifer recharge and technical field of groundwater artificial recharge.This device comprises irrigation canals and ditches (1), along several drainage Accrete clearing devices (2) of irrigation canals and ditches (1) vertical distribution, each drainage Accrete clearing device (2) comprises the underground filter pipe (4) that pre-filtering device (3), rearmounted desilting well (5) and for being communicated with pre-filtering device (3) and rearmounted desilting well (5) one are densely covered with limbers; Pre-filtering device (3) is arranged on the bottom of irrigation canals and ditches (1), and rearmounted desilting well (5) is positioned at the other end of filter pipe (4).The utility model has that project organization is simple, and take up little room, recharge groundwater efficiency is high, does not consume energy, easy construction, and cost is low waits remarkable advantage.

Description

A high-efficiency anti-clogging aquifer recharge device

technical field

The utility model relates to the technical field of aquifer replenishment, that is, groundwater artificial recharge, in particular to an efficient anti-clogging aquifer replenishment device.

Background technique

Water resources are scarce in northern China, and groundwater plays a vital role in agricultural and urban water supply. However, due to the overexploitation of agricultural and urban water use, groundwater overexploitation has caused a large area of groundwater funnel area and caused various environmental geological problems. In areas with excess flood and diverted water, in order to increase the amount of groundwater resources, technical measures of aquifer recharge such as surface seepage (ditches, canals, basins, etc.) and well water injection recharge have appeared. However, although the ditch, canal, and basin seepage replenishment technology has a small investment and good effect, it occupies a large area and affects agricultural mechanization. In the northern region where the per capita cultivated land is tight, the development is limited; Blockage is easy to occur, and water quality risk control is difficult, which affects the recharge effect and system life cycle. This is the reason why various aquifer recharge technologies have not been widely popularized.

In order to solve the problem of recharge efficiency, Chinese patent CN201210003853 discloses a method for groundwater recharge and seepage enhancement. The recharge tank is artificially excavated and built on the high permeability soil layer, and coarse sand is filled in the recharge tank as backfill for reverse filtration. By adding an exhaust pipe and an air extraction device, the average infiltration rate of the recharge well can be increased by 4-5 times during the artificial recharge of groundwater. In order to solve the problem of reinjection clogging, Chinese patent CN201120432424 discloses a device for preventing clogging of groundwater reinjection wells, which is connected to the desander through multi-stage pipelines and conversion boxes to solve the problem of single well water volume caused by clogging of reinjection wells. The problem of getting less and less water. However, neither of the above two technologies can simultaneously solve the problems of recharge efficiency, clogging and energy consumption during the recharge process.

Contents of the invention

In order to overcome the deficiencies of the above technologies, the utility model provides an efficient anti-clogging aquifer replenishment device. The utility model has the advantages of not occupying land, high recharging efficiency, lower cost than well recharging, no energy consumption, and not easy to block filter pipes.

The utility model adopts the following technical solutions:

An efficient anti-clogging aquifer replenishment device, comprising a ditch (1), characterized in that it also includes several water filtering and desilting devices (2) vertically distributed along the ditch (1), and each water filtering and desilting device (2) Including the pre-filter device (3), the post-dredging well (5), and an underground tunnel densely covered with water holes for connecting the pre-filter device (3) and the post-dredging well (5) The water filter pipe (4); the pre-filter device (3) is arranged at the bottom of the ditch (1), and the rear dredging well (5) is located at the other end of the water filter pipe (4).

The pre-filter device (3) consists of geotextile a (6), filter material (7), support layer (8), flooded space (9) and base (10) from top to bottom; The geotextile a (6) is tiled on the surface of the filter material (7); the filter material (7) is tiled on the surface of the supporting layer (8); the supporting layer (8) has small holes; the The flooded space (9) communicates with the underground water filter pipe (4).

The underground water filter pipe (4) is provided with circular or rectangular water filter holes (13), the pipe body is covered with a geotextile b (11), and the bottom of the pipe is covered with coarse sand (12).

The water filter hole (13) is circular, its hole diameter is d ₀ =(2-5) d ₅₀ , the hole spacing L ₀ =(1-1.5) d ₅₀ , where d ₀ is the diameter of the hole, L ₀ is the circle Hole spacing, d ₅₀ is the maximum particle diameter when the sieved weight of rock and soil samples at the location of the filter pipe is accumulated to 50%.

The slope of the underground water filter pipe (4) is 1/600-1/300.

The particle size of the filter material (7) D ₅₀ =(6-8) d ₅₀ , where D ₅₀ is the maximum particle diameter of 50% of the cumulative sieved weight in the particle composition of the sieved sample of the filter material, and d ₅₀ is the source water The largest particle diameter at which the weight of sediment particles accounts for 50%.

The height of the flooded space (9) is H=(1-3)D, wherein D is the diameter of the underground water filter pipe (4); the base (10) is made of bricks with a height of 0.5-1m.

The supporting layer (8) is a plexiglass plate; the specification of the geotextile a (6) is 200-400g/m ² .

The underground water filter pipe (4) is a high-density polyethylene double-wall corrugated pipe; the specification of the geotextile b (11) is 200-400g/m ² .

The thickness of the coarse sand (12) is 10-20cm; the buried depth of the underground water filter pipe (4) is lower than the maximum groundwater capillary rising height;

The buried depth of the underground water filter pipe (4) is 2-4m.

The beneficial effects of the utility model are:

The utility model can quickly supply the water in the ditch to the ground, and adopts three measures of inlet filtration technology, pipe slope setting and rear dredging well, which largely prevents the occurrence of clogging in the recharging process. The irrigation efficiency is high; in addition, when the groundwater level rises, the underground water filter pipe can also be used as a drainage pipe for drainage. The utility model has the advantages of simple design structure, little land occupation, no energy consumption, convenient construction and low cost.

Description of drawings

Figure 1 is a schematic cross-sectional view of the structure of the utility model.

Fig. 2 is the engineering plane view of the utility model.

In the figure, 1. Ditch 2. Water filtration and dredging device 3. Pre-filter device 4. Underground water filter pipe 5. Rear dredging well 6. Geotextile a 7. Filter material 8. Supporting layer 9. Flooded space 10. Base 11. Geotextile b 12. Coarse sand 13. Filter hole.

Detailed ways

Below in conjunction with specific embodiment the utility model is described in further detail.

Example 1

A high-efficiency anti-clogging aquifer recharge device, comprising a ditch (1), several water filtration and desilting devices (2) vertically distributed along the ditch (1), and each water filtration and desilting device (2) includes a pre-filter device (3), rear dredging well (5), and an underground water filter pipe (4) densely covered with water holes for connecting the pre-filter device (3) and the rear dredging well (5); The filter device (3) is arranged at the bottom of the ditch (1), and the rear dredging well (5) is located at the other end of the underground water filter pipe (4).

The pre-filter device (3) consists of geotextile a (6), filter material (7), support layer with holes (8), flooded space (9) and base (10) from top to bottom; The geotextile a (6) is tiled on the surface of the filter material (7); the filter material (7) is tiled on the surface of the supporting layer (8); small holes are opened on the supporting layer (8); the flooded space (9) Connect with the underground water filter pipe (4). The underground water filter pipe (4) has a circular water filter hole (13), the pipe body is covered with a geotextile b (11), and the bottom of the pipe is covered with coarse sand (12).

Among them, the diameter of the circular water filter hole (13) is d ₀ =2 d ₅₀ , the distance between the holes is L ₀ = d ₀ , where d ₀ is the diameter of the round hole, L ₀ is the distance between the round holes, and d ₅₀ is the rock where the water filter pipe is located. The largest particle diameter when the sieved weight of the soil sample is accumulated to 50%. Filter material (7) particle size D ₅₀ =6 d ₅₀ , where D ₅₀ is the maximum particle diameter of 50% of the accumulated sieved weight in the filter material sieved sample particle composition, and d ₅₀ is the source cement sand particle weight accounting for 50% % of the largest particle diameter.

The slope of the underground water filter pipe (4) is set to 1/400; the height of the flooded space (9) is H=D, where D is the diameter of the underground water filter pipe (4); the height of the base (10) is 1m; the geotextile a (6 ) specification is 200g/m ² ; the specification of geotextile b (11) is 200g/m ² ; the thickness of coarse sand (12) is 10cm; the buried depth of underground filter pipe (4) is 2m.

Example 2

A high-efficiency anti-clogging aquifer replenishment device, the structure and composition of which are the same as in Embodiment 1.

Among them, the diameter of the circular water filter hole (13) is d ₀ =3 d ₅₀ , the spacing between the holes L ₀ =1.2 d ₀ , where d ₀ is the diameter of the round hole, L ₀ is the spacing between the round holes, and d ₅₀ is the location of the filter pipe The largest particle diameter when the sieved weight of rock and soil samples is accumulated to 50%. Filter material (7) particle size D ₅₀ =7 d ₅₀ , where D ₅₀ is the maximum particle diameter of 50% of the cumulative sieved weight in the filter material sieved sample particle composition, and d ₅₀ is the source cement sand particle weight accounting for 50% % of the largest particle diameter. The slope of the underground water filter pipe (4) is set to 1/500; the height of the flooded space (9) is H=2D, where D is the diameter of the underground water filter pipe (4); the height of the base (10) is 0.7m; the geotextile a ( 6) The specification is 400g/m ² ; the specification of the geotextile b (11) is 200g/m ² ; the thickness of the coarse sand (12) is 15cm; the buried depth of the underground filter pipe (4) near the ground level is 3m.

Example 3

A high-efficiency anti-clogging aquifer replenishment device, the structure and composition of which are the same as in Embodiment 1.

Among them, the diameter of the circular water filter hole (13) is d ₀ =5 d ₅₀ , the hole spacing L ₀ =1.5 d ₀ , where d ₀ is the diameter of the round hole, L ₀ is the distance between the round holes, and d ₅₀ is the location of the water filter pipe The largest particle diameter when the sieved weight of rock and soil samples is accumulated to 50%. Filter material (7) particle size D ₅₀ =8 d ₅₀ , where D ₅₀ is the maximum particle diameter of 50% of the accumulated sieved weight in the filter material sieved sample particle composition, and d ₅₀ is the source cement sand particle weight accounting for 50% % of the largest particle diameter. The slope of the underground water filter pipe (4) is set to 1/600; the height of the flooded space (9) is H=7D, where D is the diameter of the underground water filter pipe (4); the height of the base (10) is 0.5m; the geotextile a ( 6) The specification is 400g/m ² ; the specification of the geotextile b (11) is 400g/m ² ; the thickness of the coarse sand (12) is 20cm; the buried depth of the underground filter pipe (4) is 4m.

In the utility model, the height of the base (10) can be adjusted according to the burial depth of the pipe, which not only supports the pre-filter device (3), but also plays the role of pipe slope protection. The underground water filter pipe (4) not only leaks and recharges the groundwater, but also plays the role of water delivery, and is also used as a channel for sand delivery. The rear dredging well (5) can not only receive the sediment transported by the filter pipe, but also manually pump water to maintain a certain water level difference, so that the water flow can wash away the sediment deposited on the wall of the filter pipe, and deposit it to the bottom of the well, and clean it regularly , Effectively prevent sediment from clogging the water filter pipes, and the water filter pipes can be connected to each other to form a pipe network, which effectively improves the effect of groundwater recharge and recharge, and expands the scope of groundwater recharge. The above test results show that during the continuous use of the utility model for one year, the recharge efficiency is continuously and stably maintained at a high level, and no clogging is detected, which fully reflects the high recharge efficiency of the utility model and the remarkable fact that the water delivery pipe is not easily blocked. characteristics, and the utility model has the advantages of simple structure, less land occupation, low cost and no energy consumption.

The above are only preferred embodiments of the present utility model. It should be pointed out that for researchers in the field, some improvements can be made without departing from the present utility model, and these improvements all belong to the protection scope of the present utility model.

Claims (10)

1. A high-efficiency anti-clogging aquifer recharge device, comprising a ditch (1), is characterized in that it also includes several water filtering and dredging devices (2) vertically distributed along the ditch (1), and each filtering water is cleared The silting device (2) includes a pre-filter device (3), a rear dredging well (5), and a densely distributed water hole for connecting the pre-filter device (3) and the rear dredging well (5) The underground water filter pipe (4); the pre-filter device (3) is arranged at the bottom of the ditch (1), and the rear dredging well (5) is located at the other end of the water filter pipe (4). 2. The high-efficiency anti-clogging aquifer replenishment device according to claim 1, characterized in that the pre-filter device (3) consists of geotextile a (6), filter material (7), supporting layer (8), flooded space (9) and base (10); the geotextile a (6) is spread on the surface of the filter material (7); the filter material (7) is spread on the supporting layer ( 8) The surface; the support layer (8) has small holes; the flooded space (9) communicates with the underground water filter pipe (4). 3. The high-efficiency anti-clogging aquifer replenishment device according to claim 1 or 2, characterized in that, the underground water filter pipe (4) is provided with circular or rectangular water filter holes (13), and the pipe body is covered with geotechnical Cloth b (11), the bottom of the pipe is covered with coarse sand (12). 4. The high-efficiency anti-clogging aquifer recharge device according to claim 3, characterized in that, the filter holes (13) are circular, with a diameter d ₀ =(2-5) d ₅₀ , and a hole spacing of L ₀ =(1-1.5) d ₅₀ , where d ₀ is the diameter of the circular hole, L ₀ is the distance between the circular holes, and d ₅₀ is the maximum particle diameter when the sieved weight of the rock and soil sample at the location of the filter pipe is 50%. 5. The high-efficiency anti-clogging aquifer replenishment device according to claim 4, characterized in that, the slope of the underground water filter pipe (4) is 1/600-1/300. 6. The high-efficiency anti-clogging aquifer recharge device according to claim 2, characterized in that, the filter material (7) particle size D ₅₀ =(6-8) d ₅₀ , wherein D ₅₀ is the filter material sieving In the particle composition of the sample, the sieved weight accumulatively accounts for 50% of the largest particle diameter, and d ₅₀ is the largest particle diameter at which the source cement sand particle weight accounts for 50%. 7. The high-efficiency anti-clogging aquifer replenishment device according to claim 2, characterized in that the height of the flooded space (9) is H=(1-3)D, where D is the underground filter pipe (4) diameter; the base (10) is made of bricks with a height of 0.5-1m. 8. The high-efficiency anti-clogging aquifer replenishment device according to claim 2, characterized in that, the supporting layer (8) is a plexiglass plate; the specification of the geotextile a (6) is 200-400g/m ² . 9. The high-efficiency anti-clogging aquifer replenishment device according to claim 3, characterized in that, the underground water filter pipe (4) is a high-density polyethylene double-wall corrugated pipe; the specification of the geotextile b (11) 200-400g/m ² . 10. The high-efficiency anti-clogging aquifer replenishment device according to claim 3, characterized in that, the thickness of the coarse sand (12) is 10-20 cm; the buried depth of the underground filter pipe (4) is 2- 4m.