阅读说明：本技术 一种基于地下渗渠自流引水的潜水含水层人工补给系统 (Artificial replenishment system for diving aquifer based on underground infiltration channel gravity flow water diversion ) 是由 冶雪艳 赵婧彤 杜新强 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种基于地下渗渠自流引水的潜水含水层人工补给系统,包括地面、河道、地下渗渠和地下渗透槽,所述地面的一侧开设有河道,所述河道一侧开设有地下渗渠,所述地面另一侧内部固定设置有地下渗透槽,所述地下渗渠远离河道的一端与地下渗透槽连接。本发明该回灌系统通过地下渗渠,引地表水源入渗补给潜水含水层,进而补给弱透水层和承压含水层,相较于将补给水直接回灌进承压含水层,这一过程回灌水水质得到了提高,避免地下水遭受污染；而且该回灌系统结构简单,实用性强,工程造价低,还能减少地表面积的使用。(The invention discloses a diving aquifer manual supply system based on underground infiltration channel self-flowing water diversion, which comprises a ground, a river channel, an underground infiltration channel and an underground infiltration groove, wherein the river channel is arranged on one side of the ground, the underground infiltration channel is arranged on one side of the river channel, the underground infiltration groove is fixedly arranged in the other side of the ground, and one end of the underground infiltration channel, which is far away from the river channel, is connected with the underground infiltration groove. According to the recharge system, surface water is introduced into the submerged aquifer through the underground infiltration channel to be infiltrated and replenished to the weakly permeable aquifer and the confined aquifer, compared with the mode that the replenishing water is directly recharged into the confined aquifer, the recharge water quality is improved in the process, and the pollution to underground water is avoided; and this recharge system simple structure, the practicality is strong, and engineering cost is low, can also reduce the use of ground surface area.)

1. The utility model provides an artifical replenishment system of dive aquifer based on underground infiltration canal is drawn water automatically, includes ground (1), river course (2), underground infiltration canal (3) and underground infiltration groove (4), its characterized in that: river course (2) have been seted up to one side on ground (1), secret infiltration canal (3) have been seted up to river course (2) one side, ground (1) opposite side inside fixed be provided with underground infiltration groove (4), the one end that river course (2) were kept away from in secret infiltration canal (3) is connected with underground infiltration groove (4).

2. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: one side of the underground infiltration channel (3) close to the underground infiltration groove (4) is arranged in an air-covered zone below the ground surface at an inclination angle of 5-10 degrees, and the underground infiltration channel (3) is used for introducing part of water of the river channel (2) exceeding the flow of the ecological base into the underground infiltration groove (4).

3. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 2, characterized in that: one side that secret infiltration canal (3) are close to river course (2) is fixed to be provided with filter equipment (5), filter equipment (5) include grid (6) and filter layer (7).

4. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 3, characterized in that: the filter layer (7) is located the initial end that underground infiltration canal (3) are close to river course (2), the thickness of filter layer (7) sets up to 10cm, filter layer (7) inside material mainly comprises medium sand (8) and coarse sand (9).

5. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 4, characterized in that: river course (2) are higher than the position department that river course ecological base current corresponds above the water level and are provided with trapezoidal recess (10), recess (10) adopt the cement material.

6. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: geotechnical cloth (11) are laid on the upper portion of the underground infiltration groove (4), and coarse sand (9) is uniformly filled in the underground infiltration groove (4).

7. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: the underground infiltration channel (3) is filled with high-permeability sand gravel.

8. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: the underground infiltration groove (4) is a cuboid underground infiltration channel, high-permeability natural media are filled in the underground infiltration groove, the underground infiltration groove (4) is covered with geotextile (11), and the upper part of the geotextile (11) is backfilled with soil.

9. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: the underground infiltration groove (4) is a cylindrical underground infiltration channel, a PVC pipe is arranged in the cylindrical underground infiltration channel, and a high-permeability natural medium is arranged in the PVC pipe.

10. The artificial replenishment system for the diving aquifer based on the underground infiltration canal gravity diversion according to claim 1, characterized in that: the inlet of the underground infiltration channel (3) is constructed by adopting artificial building materials, and the grid positioned at the groove (10) and the filter layer (7) positioned at the inlet end of the underground infiltration channel (3) can be manually disassembled and assembled.

Technical Field

The invention relates to a manual supply system for a diving aquifer, in particular to a manual supply system for a diving aquifer based on underground infiltration canal gravity flow water diversion, and belongs to the technical field of hydrogeology, underground water science and engineering.

Background

In recent years, the demand for water in society has been increasing due to the increase in population and the improvement in living standard. The surface water body is seriously polluted for a long time, and the excess exploitation of underground water resources in China is forced to cause the drainage of aquifers, so that a series of environmental problems such as ground settlement, seawater invasion, wetland area reduction, land desertification and the like are caused. The groundwater artificial recharge technology can effectively solve the problems. At present, two methods of surface infiltration recharge and deep well recharge are mainly adopted for groundwater recharge at home and abroad.

The surface infiltration recharge is mainly characterized in that natural depression, riverbed, riverway, relatively flat grassland and farmland are used for flood irrigation, and artificial ground water collection engineering facilities such as reservoirs, pools, ditches, concealed pipes, infiltration grooves or excavated pools are used for introducing and storing surface water all the year round or at regular intervals, and the surface water naturally leaks and supplies an aquifer by virtue of a natural water head difference between the surface water and underground water so as to increase the underground water reserve in the aquifer, including infiltration pool supply, ditch supply, flooding or irrigation supply, riverway infiltration supply and the like. The ground infiltration method is a method which is widely applied in the world at present, is suitable for areas with gentle topography, small gradient and better water-permeable soil layer on the ground surface, and a target aquifer has larger pores and porosity, and has the advantages of simple engineering, less investment, large income, easy management, environment beautification and the like, but also has the problems of large occupied area, low infiltration efficiency, easy generation of land salinization and swampiness and the like;

the method has the advantages of no limitation of topographic conditions, ground weak permeable soil layer distribution and underground water level buried depth conditions, no influence of climate change and other factors, small floor area, centralized recharging to the designated aquifer, less water waste, high recharging water quality requirement, high cost and management cost, easy blockage, reduced recharging rate of the pipe well and even scrapped pipe well.

Disclosure of Invention

The invention provides a method for improving the permeability of a natural river channel, aiming at solving the problems that the existing natural river channel has poor permeability, overhigh cost and management expense, is easy to block, has poor permeability, cannot enhance the regulation and storage effect of underground water so as to increase the available amount of underground water resources, and causes the reduction of the recharge rate of a pipe well or even the abandonment of the pipe well.

The invention is realized in such a way that the diving aquifer manual supply system based on the underground infiltration channel self-flowing water diversion comprises a ground surface, a river channel, an underground infiltration channel and an underground infiltration groove, wherein the river channel is arranged on one side of the ground surface, the underground infiltration channel is arranged on one side of the river channel, the underground infiltration groove is fixedly arranged in the other side of the ground surface, and one end of the underground infiltration channel, which is far away from the river channel, is connected with the underground infiltration groove.

One side of the underground infiltration channel, which is close to the underground infiltration groove, is arranged in an air-entrapping zone below the ground surface at an inclination angle of 5-10 degrees, and the underground infiltration channel is used for introducing part of water of a river channel exceeding the flow of an ecological base and taking the water level of the river channel as a control index into the underground infiltration groove;

one side of the underground infiltration channel, which is close to the river channel, is fixedly provided with a filtering device, and the filtering device comprises a grating and a filtering layer;

the filter layer is positioned at the initial end of the underground infiltration channel close to the river channel, the thickness of the filter layer is set to be 10cm, and the internal material of the filter layer mainly comprises medium sand and coarse sand;

the river course is higher than the position department that the ecological basic flow of river course corresponds above the water level and is provided with trapezoidal recess, the recess adopts the cement material. The filter layer is arranged inside the groove;

geotechnical cloth is laid on the upper portion of the underground infiltration groove, and coarse sand is uniformly filled in the underground infiltration groove.

And the underground infiltration channel is filled with high-permeability sand gravel.

The underground infiltration groove is a cuboid underground infiltration channel, high-permeability natural media are filled in the underground infiltration groove, the underground infiltration groove is covered with geotextile, and backfill materials are arranged on the upper portion of the geotextile.

The underground infiltration groove is a cylindrical underground infiltration channel, a PVC pipe is arranged in the cylindrical underground infiltration channel, and a high-permeability natural medium is arranged in the PVC pipe.

The underground infiltration channel inlet is constructed by adopting artificial building materials, and the grids positioned at the groove and the filter layer positioned at the inlet end of the underground infiltration channel can be manually disassembled and assembled.

Compared with the prior art, the invention has the beneficial effects that:

1. the recharging system can realize automatic control to some extent. A trapezoidal groove is arranged at a position above the water level of the ecological base stream of the riverway, when the water level of the riverway reaches the water inlet height of the groove, the water flow in the riverway can spontaneously flow into the groove and gradually flow into an underground infiltration channel connected with the groove, and finally, the underwater aquifer is supplied through the underground infiltration groove; when the water level in the river channel is reduced to be lower than the water inlet position of the groove, the river water can automatically stop being supplied.

2. The underground infiltration channel is inclined by 5-10 degrees along the outflow direction of the replenishing water. On one hand, a small amount of water source entering the underground infiltration channel can be ensured to smoothly flow into the underground infiltration groove even if the water level of the river channel is low; on the other hand, under the action of gravity component, the flow velocity of the recharge water is accelerated, and the risk of blockage in the underground permeation groove can be reduced to a certain extent.

3. The river course is linked together through the recess with secret infiltration canal, and the filtration of make-up water source through notch department grid and get into secret infiltration canal behind the natural sedimentation in the recess, and water source quality of water has obtained abundant purification, has reduced the risk of jam.

4. The recharge system carries out water source scheduling through underground infiltration channel design, and reduces the occupation of ground surface area; but also effectively reduces the evaporation loss of the invalid water resource; and is beneficial to the management and control of pollution.

5. The recharge system effectively reduces the risk of clogging. Firstly, a grating is arranged at the initial end of the groove, a filter layer is arranged at the initial end of the underground infiltration channel, the grating and the filter layer can effectively improve the quality of the reinjection water, and the grating and the filter layer can be periodically disassembled and replaced to maintain the working efficiency; secondly, the underground infiltration channel is obliquely arranged along the outflow direction of the replenishing water, so that the flow velocity of the reinjection water is accelerated, and the risk of blockage in the infiltration tank can be reduced to a certain extent; thirdly, the geotextile covers the underground infiltration channel, so that the scouring action of water flow can be effectively prevented from carrying suspended particles to enter the underground infiltration channel, the gap of an infiltration medium is reduced, and the recharge rate is reduced.

6. The recharge system leads surface water source to enter a submerged aquifer for recharging through an underground infiltration channel, and then supplies a weak permeable stratum and a confined aquifer, compared with the method of directly recharging the recharge water into the confined aquifer, the recharge water quality is improved in the process, and the pollution to underground water is avoided; and this recharge system simple structure, the practicality is strong, and engineering cost is low, can also reduce the use of ground surface area.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A in accordance with the present invention;

fig. 3 is a schematic plan view of the filter layer in the subsurface infiltration gallery of the present invention.

In the figure: 1. a ground surface; 2. a river channel; 3. an underground infiltration canal; 4. an underground infiltration tank; 5. a filtration device; 6. a grid; 7. a filter layer; 8. carrying out medium sand; 9. coarse sand; 10. a groove; 11. and (4) geotextile.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.