阅读说明：本技术 一种含水层渗流转化为管道流增大供水能力的方法 (Method for increasing water supply capacity by converting aquifer seepage into pipeline flow ) 是由 陈学群 管清花 田婵娟 刘丹 范明元 刘海娇 王爱芹 于 2020-07-14 设计创作，主要内容包括：本发明涉及一种含水层渗流转化为管道流增大供水能力的方法,其特征在于：在含水砂层(9)由垂直竖井(7)向四周水平方向延伸设置水平井(8),水平井(8)与垂直竖井(7)连通在一起,所述水平井(8)是一水平管道,由引鞋(1)、调长管(2)、筛管(3)及管道连接件(10)构成,利用管道连接件(10)与垂直竖井(7)连通在一起,引鞋(1)为不透水顶帽,具有一定的穿透性,而且防止泥沙进入水平井(8)内,调长管(2)能调节水平管道的长度；筛管(3),也称滤水管,含水砂层(9)内的地下水通过筛管(3)渗入到水平井(8)内,形成管道流。本发明在取水过程中垂直竖井水位下降时,能大大增加供水井的供水能力。(The invention relates to a method for converting aquifer seepage into pipeline flow to increase water supply capacity, which is characterized by comprising the following steps: a horizontal well (8) is arranged on a water-containing sand layer (9) in a manner that the horizontal well extends from a vertical shaft (7) to the peripheral horizontal direction, the horizontal well (8) is communicated with the vertical shaft (7), the horizontal well (8) is a horizontal pipeline and comprises a guide shoe (1), a length adjusting pipe (2), a sieve pipe (3) and a pipeline connecting piece (10), the pipeline connecting piece (10) is communicated with the vertical shaft (7), the guide shoe (1) is a waterproof top cap and has certain penetrability, silt is prevented from entering the horizontal well (8), and the length of the horizontal pipeline can be adjusted by the length adjusting pipe (2); the screen pipe (3) is also called a filter pipe, and the underground water in the water-containing sand layer (9) permeates into the horizontal well (8) through the screen pipe (3) to form a pipeline flow. The invention can greatly increase the water supply capacity of the water supply well when the water level of the vertical shaft is reduced in the water taking process.)

1. The utility model provides a method for increasing water supply capacity is flowed into to pipeline to aquifer seepage, includes water intaking pump (5), pipeline (6) and vertical shaft (7), and water intaking pump (5) are installed in vertical shaft (7) to get through pipeline (6) and use groundwater, its characterized in that: and a horizontal well (8) is arranged on the water-containing sand layer (9) in a manner that the vertical shaft (7) extends to the peripheral horizontal direction, and the horizontal well (8) is communicated with the vertical shaft (7).

2. The method of increasing water supply capacity of a pipeline flow by conversion of aquifer seepage according to claim 1, wherein: the horizontal well (8) is a horizontal pipeline and consists of a guide shoe (1), a length adjusting pipe (2), a sieve pipe (3) and a pipeline connecting piece (10), the pipeline connecting piece (10) is communicated with the vertical shaft (7), the guide shoe (1) is a waterproof top cap and has certain penetrability, silt is prevented from entering the horizontal well (8), and the length of the horizontal pipeline can be adjusted by the length adjusting pipe (2); the screen pipe (3) is also called a strainer, and the underground water in the water-containing sand layer (9) permeates into the horizontal well (8) through the screen pipe (3) to form a pipeline flow.

3. The method of increasing water supply capacity of a pipeline flow by conversion of aquifer seepage according to claim 1, wherein: the far end of the horizontal well (8) is higher than the near end of the vertical shaft (7), and the inclination angle of the horizontal well (8) is 80-89 degrees.

4. The method of increasing water supply capacity of a pipeline flow by conversion of aquifer seepage according to claim 1, wherein: gravels (4) are arranged around the horizontal well (8).

5. The method of increasing water supply capacity of a pipeline flow by conversion of aquifer seepage according to claim 1, wherein: the horizontal well (8) can change the length as required.

6. The method of increasing water supply capacity of a pipeline flow by conversion of aquifer seepage according to claim 1, wherein: the same horizontal wells (8) can be arranged in the same water-containing sand layer (9) in a crossed mode, vertical shafts are newly built at the crossed points, and filtering layers are arranged on the vertical shafts and are communicated with the horizontal wells.

Technical Field

The invention belongs to the technical field of hydrogeology and underground water science, and particularly relates to a method for increasing water supply capacity by converting aquifer seepage into pipeline flow.

Background

The riverside water source has a certain purification effect on the surface water quality due to stable water supply, and becomes an important underground water development and utilization mode in China. The production of such single wells from a source is generally affected by the thickness, porosity and connectivity between the river and the groundwater of the aquifer. At present, the exploitation mode of the water source area of the riverway is mainly that group well pumping is performed, the distribution of exploitation wells is centralized, and under the condition, if the groundwater replenishment speed of the riverway is slow, the groundwater is exploited in the mode, the groundwater in the area cannot be replenished in time, the water level in the central area of the water source area groundwater level falling funnel rapidly falls, and the exploitation wells interfere with each other, so that the problem that the exploitation amount is reduced and the requirement of producing and living water cannot be met is caused.

Disclosure of Invention

The invention relates to a method for increasing the water supply capacity of a water taking well by converting aquifer seepage into pipeline flow and a water well structure, namely, water is taken by combining a vertical well and a horizontal well. The technical scheme adopted for realizing the invention is as follows: the utility model provides a method for aquifer seepage flow turns into pipeline flow increase water supply ability, includes water intaking pump, pipeline and perpendicular shaft, and the water intaking pump is installed in perpendicular shaft to take groundwater through the pipeline, its characterized in that: the horizontal well is arranged on the water-containing sand layer in a manner that the horizontal well extends from the vertical shaft to the peripheral horizontal direction, the horizontal well is communicated with the vertical shaft, the horizontal well is a horizontal pipeline and consists of a guide shoe, a length adjusting pipe, a sieve pipe and a pipeline connecting piece, the pipeline connecting piece is communicated with the vertical shaft, the guide shoe is a waterproof top cap and has certain penetrability, silt is prevented from entering the horizontal well, and the length of the horizontal pipeline can be adjusted by the length adjusting pipe; the screen pipe is also called a strainer pipe, and the underground water in the water-bearing sand layer permeates into the horizontal well through the screen pipe to form a pipeline flow. The far end of the horizontal well is higher than the near end of the vertical shaft, the inclination angle of the horizontal well is 80-89 degrees, and gravels are arranged around the horizontal well. The horizontal wells can be changed in length as required, the same horizontal wells can be arranged in the same water-bearing sand layer in a crossed mode, a vertical shaft is newly built at the crossed point, and the vertical shaft is provided with a filter layer and is communicated with the horizontal well pipe.

The water level of the vertical shaft is reduced in the water taking process, and under the action of the head pressure difference, the water in the horizontal shaft and the water in the sand layer supply the vertical shaft, so that the water supply capacity of the water supply well is greatly increased.

The invention is characterized in that:

first, porous seepage of porous aquifer is converted into pipeline flow

The fourth series of aquifers mainly comprise a sand layer and a sand gravel layer, underground water is stored in pores of the aquifer, the underground water mainly comprises Darcy seepage of a porous medium, and the seepage speed is influenced by the hydraulic gradient, the porosity, the replenishment speed of surface water and the like. The pipeline flow generally develops in a karst area groundwater aquifer, is an important flow passage of groundwater, and is characterized by strong replenishment capacity, large water quantity and fast flow speed, and is reflected in large water yield of a single well.

Second, install horizontal well device in moisture sand layer

The distribution structure of the fourth series of strata is generally in a layered characteristic, generally, aquifers and relative water barriers are alternately or continuously distributed, the relative thickness of sand layers in a riverside water source area is large, a vertical water taking well is mainly used in a traditional underground water taking mode, the water supply amount of a single well is limited by the thickness of the aquifers, the supply speed is low, and the water inflow amount of the single well is small. This adopts the mode that horizontal well supply combines vertical well water intaking, through installing the horizontal well device in the water-bearing sand bed, wherein can infinitely extend in the horizontal direction, also can be a plurality of horizontal wells of same vertical well cross, this kind of horizontal well can greatly increased infiltration pipe and water-bearing sand bed's area of contact, its ability that filters groundwater increases, this kind of mode is by the supply source of original punctiform supply water intaking well, increased with the rainfall supply source, the area is supplied in the contact of river course side infiltration supply source etc. moreover groundwater seepage is stored in the horizontal well. Horizontal wells are generally classified into long-radius horizontal wells, medium-radius horizontal wells, short-radius horizontal wells, and ultra-short-radius horizontal wells according to the difference in the radius of curvature of the horizontal wells.

Thirdly, connecting a fourth sand system layer and a pipeline flow in the aquifer by a vertical shaft

The horizontal well can design a set ofly, also can design the multiunit, sets up perpendicular shaft at multiunit horizontal well junction, and its pipe that permeates water communicates hydrous sand layer and each pipeline flow, and the vertical well mainly is as the water intaking well, and when the water intaking well water intaking, the flood peak of water intaking well descends, and under the effect of flood peak pressure, the water in the pipeline supplies the vertical well with the mode of pipeline flow, and the hole water of fourth system aquifer passes through the mode supply vertical well of seepage in addition, consequently, greatly increased the water supply capacity of perpendicular shaft.

In the process of taking water, the water level of the vertical shaft is reduced, and the water in the horizontal shaft and the water in the sand layer are supplied to the vertical shaft under the action of the head pressure difference, so that the water supply capacity of the vertical shaft is greatly improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure, 1, guide shoes, 2, a length adjusting pipe, 3, a sieve pipe, 4, gravel, 5, a water taking pump, 6, a pipeline, 7, a vertical shaft, 8, a horizontal well, 9, a water-containing sand layer, 10 and a pipeline connecting piece are arranged.

The specific implementation mode is as follows:

referring to the attached drawings, the method for increasing the water supply capacity by converting the aquifer seepage into the pipeline flow comprises a water taking pump 5, a pipeline 6 and a vertical shaft 7, wherein the water taking pump 5 is installed in the vertical shaft 7 and takes the underground water through the pipeline 6, and is characterized in that: a horizontal well 8 is arranged on a water-containing sand layer 9 in a manner that the horizontal well 8 extends from a vertical shaft 7 to the peripheral horizontal direction, the horizontal well 8 is communicated with the vertical shaft 7, the horizontal well 8 is a horizontal pipeline and is composed of a guide shoe 1, a length adjusting pipe 2, a sieve pipe 3 and a pipeline connecting piece 10, the pipeline connecting piece 10 is communicated with the vertical shaft 7, the guide shoe 1 is a waterproof top cap and has certain penetrability, silt is prevented from entering the horizontal well 8, and the length of the horizontal pipeline can be adjusted by the length adjusting pipe 2; the screen pipe 3, also called a strainer, allows groundwater in the aquifer sand layer 9 to penetrate into the horizontal well 8 through the screen pipe 3, forming a pipe flow. The far end of the horizontal well 8 is higher than the near end of the vertical shaft 7, the inclination angle of the horizontal well 8 is 80-89 degrees, and gravels 4 are arranged around the horizontal well 8. The length of the horizontal well 8 can be changed as required, the same horizontal well 8 can be arranged in the same water-containing sand layer 9 in a crossed mode, a vertical shaft is newly built at the crossed point, and a filtering layer is arranged on the vertical shaft and communicated with the horizontal shaft.

The water level of the vertical shaft is reduced in the water taking process, and under the action of the head pressure difference, the water in the horizontal shaft and the water in the sand layer supply the vertical shaft, so that the water supply capacity of the water supply well is greatly increased.