JP6529201B2 - Groundwater pumping system and pumping method using the system - Google Patents

Description

  The present invention relates to a groundwater pumping system for pumping groundwater from an aquifer containing a saltwater freshwater layer and a pumping method using the system.

  Conventionally, to take fresh water in the freshwater area formed above the underground saltwater layer, a pair of wells adjacent to each other is constructed, and the strainer at the lower end of one well is replaced by freshwater in the freshwater area and the other well at the lower end. The strainers are respectively exposed to salt water, and fresh water and salt water are taken through pumps installed respectively above the strainers (see Patent Document 1).

JP, 2009-150076, A

  However, in the groundwater pumping system described in Patent Document 1, it is necessary to construct two wells, which is costly. In addition, if the boundary water area of saltwater in the aquifer fluctuates and rises, there is a problem that freshwater intake becomes difficult or the well must be abandoned. In other words, even if it is a well for freshwater pumping constructed to face the freshwater area, there is a problem that it can not be used if the water level in the lower saltwater area rises.

  The present invention was made to solve the above problems, and aims to reduce costs with a simple configuration, and to reliably take non-freshwater such as freshwater and saltwater even if the boundary water area of saltwater changes. Groundwater pumping system and pumping method using that system.

  The groundwater pumping system according to claim 1 of the present invention comprises at least two or more pumping means which are vertically separated from each other and vertically lifted and lowered in the interior of a well constructed to reach an aquifer from the ground. It is arranged between the pumping means so as to be able to move up and down, has a predetermined length in the vertical direction, and has a filling part that can expand and contract in the horizontal direction, and when expanding it expands the filling part and communicates the upper and lower At least one of the pumping means of each pumping means is provided with a capping means for blocking and shrinking the filling space from the inner surface of the well at the time of contraction, and lifting and lowering means for lifting and lowering the pumping means and filling means. Among the water layer, the other pumping means are respectively disposed in the non-freshwater area in the freshwater area, and the elevating means integrally raises and lowers the pumping means and the gap means disposed in the non-freshwater area, These non-freshwater side pumping means are placed in the freshwater area It is characterized by elevating independently for the pumping means and the gap filling section.

  In the groundwater pumping system according to claim 1 of the present invention, at least two or more pumping means which are vertically separated from each other in the well which is constructed to reach the aquifer from the ground and which are vertically separated from each other, It is arranged between the pumping means so as to be able to move up and down, has a predetermined length in the vertical direction, and has a filling part that can expand and contract in the horizontal direction, and when expanding it expands the filling part and communicates the upper and lower At least one of the pumping means of each pumping means is provided with a capping means for blocking and shrinking the filling space from the inner surface of the well at the time of contraction, and lifting and lowering means for lifting and lowering the pumping means and filling means. Among the water layer, the other pumping means are respectively disposed in the non-freshwater area in the freshwater area, and the elevating means integrally raises and lowers the pumping means and the gap means disposed in the non-freshwater area, These non-freshwater areas are used as pumping means placed in freshwater areas By the was raised and lowered independently for the pumping means and the gap filling section can be water intake from the freshwater and non freshwater alone wells. Moreover, since the boundary area between the freshwater area and the non-freshwater area is blocked by the gap means, fresh water quality can be secured and intake can be made.

  The groundwater pumping system according to claim 2 of the present invention is configured to be able to adjust the distance between the pumping means arranged vertically, and to construct the filling space from a plurality of types having different lengths in the vertical direction, According to the boundary area between the freshwater area and the non-freshwater area of the aquifer, the gap is selected and arranged.

  In the groundwater pumping system according to a third aspect of the present invention, the lifting and lowering means integrally lifts and lowers the lifting and lowering means disposed on the lower side, and the lifting and lowering means is disposed on the upper side. And elevating means independently of each other.

  The groundwater pumping system according to claim 4 of the present invention is characterized in that the space of the space means is divided according to the boundary area between the fresh water area and the non-fresh water area of the aquifer. There is.

  In the groundwater pumping system according to claim 4 of the present invention, the gap part of the gap means is divided according to the boundary area between the freshwater area and the non-freshwater area of the aquifer, whereby the boundary is formed. Even if the area layer is thick, it can be accommodated, and furthermore, the filling space can be miniaturized and simplified.

  The groundwater pumping system according to claim 5 of the present invention is provided with detection means for respectively detecting water pressure and water quality in the vicinity of each pumping means and outputting them to the outside, and based on the data detected by the detection means It is characterized in that control means is provided for operating each pumping means, filling means and lifting means, and each pumping means and filling means are moved up and down according to the fluctuation of the boundary area.

  In the groundwater pumping system according to claim 5 of the present invention, detection means for respectively detecting water pressure and water quality and outputting them outside is provided in the vicinity of each pumping means, and based on the data detected by the detection means A control means is provided for operating each pumping means, filling means and lifting means, and the pumping means and filling means are moved up and down according to the fluctuation of the boundary area, so that the condition of the aquifer It can correspond to the change of in real time.

  In the groundwater pumping system according to claim 6 of the present invention, the pumping means comprises a pumping pump and a pumping pump control device, the detecting means comprises a water pressure sensor and a water quality sensor, and the clearance means is via a blocking packer and a pressure regulator. It is characterized in that it comprises a compressor which is communicated with the shut-off packer and capable of pumping air.

  A pumping method using a groundwater pumping system according to a seventh aspect of the present invention, the groundwater pumping system is vertically separated and vertically suspended in a well constructed from the ground toward the aquifer. At least two or more pumping means, and a vertically expanding / vacuuming gap disposed between the pumping means and having a predetermined length in the vertical direction, and having a horizontally expandable / shrinkable clearance, which is expanded upon expansion It has a filling means for expanding the part to shut off the communication between the upper and lower parts and retracting the filling part from the inner surface of the well at the time of contraction, and raising and lowering means for raising and lowering these pumping means and filling means The means raises and lowers the pumping means disposed in the non-freshwater zone integrally with the gap means, and the pumping means disposed in the fresh water zone is applied to the pumping means and the gap means on the non-freshwater zone side. To move up and down independently When lifting off, the packing means is degenerated to lift up each pumping means and packing means, and among the pumping means, the pumping means on the freshwater area side is in the freshwater area on the non-freshwater area side in the aquifer. When each of the pumping means reaches the non-freshwater area, suspension is stopped, the gap means is expanded, communication between the upper and lower wells is shut off, and pumping is performed by each pumping means.

  In the pumping method using the groundwater pumping system according to claim 7 of the present invention, the groundwater pumping system is vertically separated and vertically suspended in the well constructed from the ground to the aquifer. At least two or more pumping means, and a vertically expanding / vacuuming gap disposed between the pumping means and having a predetermined length in the vertical direction, and having a horizontally expandable / shrinkable clearance, which is expanded upon expansion It has a filling means for expanding the part to shut off the communication between the upper and lower parts and retracting the filling part from the inner surface of the well at the time of contraction, and raising and lowering means for raising and lowering these pumping means and filling means The means raises and lowers the pumping means disposed in the non-freshwater zone integrally with the gap means, and the pumping means disposed in the fresh water zone is applied to the pumping means and the gap means on the non-freshwater zone side. To move up and down independently When lifting off by means, the clearance means is degenerated to lift down each pumping means and filling means, and among the pumping means, the pumping means on the freshwater area side is in the freshwater area on the non-freshwater area side in the aquifer. When each of the pumping means reaches the non-freshwater area, suspension is stopped, the gap means is expanded, communication between the upper and lower wells is cut off, and pumping is performed by each pumping means. It is possible to take water from freshwater and non-freshwater in the well. Moreover, since the boundary area between the freshwater area and the non-freshwater area is blocked by the gap means, fresh water quality can be secured and intake can be made. Furthermore, even if the boundary area fluctuates up and down or the width fluctuates, if the vertical position of each pumping means and the vertical position of the clearance means are changed by the lifting means, fresh water and non-fresh water can be separated reliably. It is possible to take water.

  A pumping method using a groundwater pumping system according to claim 8 of the present invention is configured to be able to adjust the distance between the pumping means arranged above and below, and the filling space is made of a plurality of types having different lengths in the vertical direction. The space is selected and arranged according to the boundary area between the freshwater area and the non-freshwater area of the aquifer, which has been obtained beforehand When the clearance of the is placed in the boundary area, the suspension is stopped.

  In the pumping method using the groundwater pumping system according to claim 9 of the present invention, the lifting and lowering means integrally lifts and lowers the lifting and lowering means disposed on the lower side, and the lifting and lowering means is disposed on the upper side. The lower lifting means and the filling means are configured to be moved up and down independently, and at the time of suspension, the lifting means and the filling means disposed on the lower side are integrally suspended and then placed on the upper side. It is characterized by suspending the pumping means.

  In the pumping method using the groundwater pumping system according to claim 9 of the present invention, the lifting and lowering means integrally lifts and lowers the lifting and lowering means disposed on the lower side, and the lifting and lowering means is disposed on the upper side. The lower lifting means and the filling means are configured to be moved up and down independently, and at the time of suspension, the lifting means and the filling means disposed on the lower side are integrally suspended and then placed on the upper side. By suspending the pumping means, it is possible to cope with the case where the boundary area between the fresh water area and the non-fresh water area fluctuates up and down or expands or contracts, for example. In addition, even if the positional relationship between the fresh water area and the non-fresh water area is up and down, the pumping means can be guided to a position where water intake should be taken according to the positional relationship.

  A pumping method using a groundwater pumping system according to a tenth aspect of the present invention is provided with a detecting means for detecting water pressure and water quality and outputting them outside in the vicinity of each pumping means, and detected by the detecting means Control means for operating the respective pumping means, filling means and lifting means based on the data, and detecting the fluctuation of the boundary area by the detecting means, the control means controls the pumping means and the filling according to the fluctuation of the boundary area It is characterized by moving the gap means up and down.

  In the pumping method using the groundwater pumping system according to claim 10 of the present invention, detecting means for detecting water pressure and water quality and outputting them outside is provided in the vicinity of each pumping means and detected by the detecting means Control means for operating the respective pumping means, filling means and lifting means based on the data, and detecting the fluctuation of the boundary area by the detecting means, the control means controls the pumping means and the filling according to the fluctuation of the boundary area By moving the gap means up and down, it is possible to respond in real time to changes in the condition of the aquifer.

  The groundwater pumping system according to claim 1 of the present invention comprises at least two or more pumping means which are vertically separated from each other and vertically lifted and lowered in the interior of a well constructed to reach an aquifer from the ground. It is arranged between the pumping means so as to be able to move up and down, has a predetermined length in the vertical direction, and has a filling part that can expand and contract in the horizontal direction, and when expanding it expands the filling part and communicates the upper and lower At least one of the pumping means of each pumping means is provided with a capping means for blocking and shrinking the filling space from the inner surface of the well at the time of contraction, and lifting and lowering means for lifting and lowering the pumping means and filling means. Among the water layer, the other pumping means are respectively disposed in the non-freshwater area in the freshwater area, and the elevating means integrally raises and lowers the pumping means and the gap means disposed in the non-freshwater area, These non-freshwater side pumping means are placed in the freshwater area Since so as to lift independently for the pumping means and the gap filling section, it is possible to the intake to the well with a single well, costs can be reduced. Since the boundary area between the fresh water area and the non-fresh water area can be reliably blocked, fresh water quality can be ensured and intake can be made. Also, even if the boundary area fluctuates up and down or the width fluctuates, fresh water and non-fresh water can be reliably separated and taken. For this reason, it is possible to use the well once built for a long time without abandoning it, and to reduce the cost over a long time.

  A pumping method using a groundwater pumping system according to a seventh aspect of the present invention, the groundwater pumping system is vertically separated and vertically suspended in a well constructed from the ground toward the aquifer. At least two or more pumping means, and a vertically expanding / vacuuming gap disposed between the pumping means and having a predetermined length in the vertical direction, and having a horizontally expandable / shrinkable clearance, which is expanded upon expansion It has a filling means for expanding the part to shut off the communication between the upper and lower parts and retracting the filling part from the inner surface of the well at the time of contraction, and raising and lowering means for raising and lowering these pumping means and filling means The means raises and lowers the pumping means disposed in the non-freshwater zone integrally with the gap means, and the pumping means disposed in the fresh water zone is applied to the pumping means and the gap means on the non-freshwater zone side. To move up and down independently When lifting off, the packing means is degenerated to lift up each pumping means and packing means, and among the pumping means, the pumping means on the freshwater area side is in the freshwater area on the non-freshwater area side in the aquifer. When the pumping means of each reached the non-freshwater area, suspension was stopped, the gap means was expanded, and after communication between the upper and lower wells was cut off, the water was taken up by each of the pumping means. Can be a single well, which can reduce costs. The boundary between the fresh water area and the non-fresh water area can be blocked reliably, so that fresh water can be reliably taken. In addition, even if the condition of the aquifer changes and the boundary area fluctuates up and down or the width fluctuates, it is possible to cope with it in real time and separate fresh water and non-fresh water reliably. For this reason, it is possible to use the well once built for a long time without abandoning it, and to reduce the cost over a long time.

It is a conceptual diagram showing a groundwater pumping system concerning a 1st embodiment of the present invention. It is a conceptual diagram showing a groundwater pumping system concerning a 2nd embodiment of the present invention. (A) is explanatory drawing which compares and shows the groundwater pumping system which concerns on 1st Embodiment, and (B) compares the groundwater pumping system which concerns on 2nd Embodiment. (A) to (D) are respectively an explanatory view showing a state before pumping, an explanatory view showing salinization by pumping, pumping of the upper fresh water area and pumping of the lower salt water area by the groundwater pumping system according to the first embodiment And a pumping process according to the second embodiment, when the saltwater layer is present in the middle of the freshwater area by the groundwater pumping system according to the second embodiment, the pumping of the freshwater area and the pumping of the intermediate saltwater area In the same manner as in the first embodiment to simultaneously maintain the salt-water boundary. (A) is a conceptual diagram which each shows the groundwater pumping system which concerns on 3rd Embodiment, (B) shows the groundwater pumping system which concerns on 4th Embodiment, respectively. It is a graph which shows the water level measurement result which measured progress of the water level with the apparatus of the structure substantially the same as the apparatus used for the groundwater pumping system concerning 1st Embodiment. It is a graph which shows the electrical conductivity measurement result which measured progress of the electrical conductivity of the upper stage and lower stage of a blocking packager by the apparatus of the structure substantially the same as the apparatus used for the groundwater pumping system concerning 1st Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual view showing a groundwater pumping system according to a first embodiment of the present invention.

  The groundwater pumping system 2 according to the first embodiment of the present invention is configured to construct a single well 5 extending from the ground 3 to the aquifer 4 and perform pumping through the well 5. In general, the aquifer 4 has a saltwater area (non-freshwater area) S1 having a relatively high specific gravity on the lower side, and a freshwater area W1 having a relatively low specific gravity on the upper side, Water layer) B1 layer is formed. However, depending on the conditions such as weather and tsunami, the saltwater area may be on the upper side and the freshwater area may be on the lower side, or the freshwater area may appear further below the lower saltwater area (see (D) in FIG. 4). . The well 5 is configured by arranging a holding hole tube 7 in which a large number of pores are formed inside the drilling hole 6. That is, outside water can come in and out of the well 5.

  Inside the well 5, a first water pumping pump (water pumping means) 11 and a second water pumping pump (water pumping means) 12 are vertically separated from each other through the cord 13 so as to be lifted and lowered freely. These first and second pumping pumps 11 and 12 are connected to a pumping pump control device 18 on the ground side. Flowmeters F1 and F2 are provided for the respective pumping pumps 11 and 12 to measure the discharge amount. A blocking packer (filler) 14 is disposed between the first and second pumping pumps 11 and 12 and is communicated with the blocking packer 14 via a patcher pressure regulator (pressure regulator) 15 on the ground side to provide air. Is connected to an air compressor 16 capable of pumping. The blocking packer 14 is made of a rubber bag having flexibility and elasticity, and expands when high-pressure air is introduced into the inside, and the surface deflates when the high-pressure air inside is discharged and the original state is restored. It is supposed to return. That is, when air is pressure-fed from the air compressor 16 through the packer pressure regulator 15, the blocking packer 14 expands to block the inside of the well 5, thereby blocking the upper and lower communication. In addition, when the internal air is released through the packer pressure regulator 15, the blocking packer 14 receives water pressure to shrink, and returns to its original shape so that the surface is degenerated from the inner surface of the well 5. A filling means is constituted by the blocking packer 14, the packer pressure regulator 15 and the air compressor 16.

  The first and second pumping pumps 11 and 12 are connected to a winch (lifting means) 17 installed above the well 5 on the ground side via a single cord 13 and suspended at a desired position inside the well 5 It is supposed to be taken out and pulled up. The first lift pump 11 disposed on the upper side and the second lift pump 12 disposed on the lower side are attached to the cord 13 so that the distance between the two pumps 11 and 12 can be adjusted. The positions at which the first and second pumping pumps 11 and 12 are suspended by the winch 17 are determined based on the depths (ranges) of the salt water area S1, the fresh water area W1 and the boundary area B1 obtained in advance. That is, according to the positions of the freshwater zone W1 and the saltwater zone S1 obtained in advance, the upper first lift pump 11 is disposed in the freshwater zone W1, and the lower second pump 12 is disposed in the saltwater zone S1. It has become so.

  The groundwater pumping system 2 according to the present embodiment is applied to the case where the thickness B1w of the layer in the boundary area B1, that is, the vertical length B1w of the boundary area B1 is known in advance. That is, the distance between the upper and lower pumps 11 and 12 is made to correspond to the thickness B1w of the layer in the boundary area B1 and slightly longer than the thickness B1w in consideration of the attachment of the blocking packer 14. It can be attached. The blocking packer 14 is selected from a plurality of types having different lengths in the vertical direction, and the length L1 in the vertical direction corresponds to the thickness B1w of the layer in the boundary area B1 previously obtained. A blocking packer 14 is selected to be disposed between the upper and lower pumping pumps 11 and 12.

  Water pressure sensors PRS1 and PRS2 and water quality sensors (electrical conductivity sensors) EDS1 and EDS2 are attached to the first and second pumping pumps 11 and 12, respectively. It is supposed to be sent out. The water pressure gauge measures the depth of the pumping pumps 11, 12, and the conductivity meter measures the salt concentration in water. Flow meters F1 and F2, packer pressure regulator 15, winch drive controller (not shown), water pressure gauge (water pressure sensors PRS1 and PRS2) and conductivity meters (water quality sensors EDS1 and EDS2) are external PC or mobile phone respectively It is electrically connected to a terminal device (not shown). For this reason, when moving the pumping pumps 11 and 12 according to the change in water quality (the change in salt concentration), the pumping by the pumping pumps 11 and 12 is temporarily stopped and the air of the blocking packer 14 is withdrawn The winch 17 is operated to move the lift pumps 11 and 12 to a desired position in the vertical direction, and after moving, the blocking packer 14 is expanded and the space between the first and second lift pumps 11 and 12 in the well 5. The communication is cut off, and the first and second pumping pumps 11, 12 are operated to start pumping water from the fresh water area W1 and the salt water area S1. As described above, it is possible to cope with the change in the condition of the aquifer 4 in real time.

  The first and second pumping pumps 11 and 12 are disposed close to each other in the vertical direction with the layer of the boundary area B1 interposed therebetween. The reason is that, for example, in an aquifer where the fresh water area is on the upper side and the salt water area on the lower side as shown in (A) of FIG. The up corning phenomenon shown in (B) of FIG. 4 may be caused, and the fresh water area may be salted by pumping. For this reason, in the present embodiment, as shown in FIG. 4C, the first and second pumping pumps 11 and 12 are disposed across the layer of the boundary area B1, and the salt light boundary area (boundary area) B1 To maintain the In FIG. 4D, the aquifer 4A is divided into the layers of the freshwater area W2u, the salt-water boundary area (boundary area) B2u, the saltwater area S2, the salt-water boundary area (boundary area) B2d, and the freshwater area W2d from the upper side. An example is shown in which the blocking packer 14 is also disposed below the lower second pumping pump 12. In this case, the upper first pumping pump 11 is placed on the upper freshwater zone W2u, and the lower second pumping pump 11 is disposed. The pumping pump 12 is disposed in the salt water area B2 and the blocking packer 14 is disposed in the upper salt-water boundary area B2u, and another blocking packer 14 is disposed below the lower second pumping pump 12 in the lower salt-water boundary area B2d To maintain the boundary between both salt and light boundaries B2u and B2d.

  Next, the groundwater pumping method using the groundwater pumping system of the present invention will be described based on the operation of the groundwater pumping system 2 according to the first embodiment. First, the winch 17 is installed above the well 5 and the second lift pump 12 disposed at the lower side is attached to the lower end of the cord 13, and the blocking packer 14 is attached to the upper side thereof. For the blocking packer 14, the blocking packer 14 (vertical length L1) corresponding to the layer thickness B1w of the boundary area B1 obtained in advance is selected. The first lift pump 11 is attached to the upper side of the shutoff packer 14 (first step S1). At this time, the air is removed from the inside of the blocking packer 14, and when it sinks in water, the blocking packer 14 shrinks and the surface recedes inward from the hole-holding tube 7 of the well 5.

  Next, the winch 17 is operated to suspend the second pumping pump 12, the blocking packer 14, and the first pumping pump 11 in this order to the inside of the holding pipe 7 of the well 5, and the second pumping pump 12 When the blocking packer 14 reaches the boundary area B1 and the first pumping pump 11 reaches the fresh water area W1 in the salt water area S1, the operation of the winch 17 is stopped (second step S2). Next, high pressure air is pumped from the air compressor 16 to the blocking packer 14 via the packer pressure regulator 15, and the blocking packer 14 is expanded against water pressure, and pressed against the inner surface of the hole forming tube 7 Communication in the well 5 between the two water pumps 11 and 12 is shut off (third step S3). After the communication is cut off by the shut-off packer 14, fresh water is simultaneously pumped from the first pumping pump 11 by the pumping pump control device 18 and salt water from the second pumping pump 12 simultaneously to suppress fluctuations in the boundary area B1 and maintain fresh water quality The water is pumped (fourth step S4).

  When the water quality sensors EDS1 and EDS2 detect a change in water quality (salt concentration) exceeding the threshold value, the operation of both pumping pumps 11 and 12 is stopped, the air is removed from the blocking packer 14, and the winch 17 Thus, the depths of the salt water area S1, the boundary area B1 and the fresh water area W1 are determined by the water quality sensors EDS1 and EDS2 by moving the cord 13 up and down (fifth step S5). When each depth is determined, the second step S2 to the fourth step S4 are repeated to restart pumping. At this time, if there is a change in the thickness B1w of the boundary area B1, temporarily lift both the pumps 11, 12 and the blocking packer 14 to the ground, replace the blocking packer 14 with an appropriate length, and again It is hung down in the well 5 (sixth step S6).

  As described above, since the groundwater pumping method using the groundwater pumping system according to the present embodiment is configured as described above, a single well 5 can be used to take water from the fresh water area W1 and the salt water area S1. In addition, since the boundary area B1 between the fresh water area W1 and the salt water area S1 is blocked by the blocking packer 14, fresh water quality can be ensured and intake can be made. Furthermore, even if the boundary area B1 fluctuates up and down or the width fluctuates, the vertical position of each pumping pump 11, 12 is changed by the winch 17, or the distance between both pumping pumps 11, 12 in the cord 13 By adjusting and replacing the blocking packer 14, it is possible to cope with the fluctuation, to correspond in real time to the change of the condition of the aquifer 4, and to separate and take fresh water and salt water reliably. .

  Next, a groundwater pumping system 102 according to a second embodiment of the present invention will be described. In the groundwater pumping system 102 according to the second embodiment of the present invention, the groundwater pumping system 2 according to the first embodiment is selected from a plurality of blocking packers 14 having different lengths according to the thickness B1w of the boundary area B1. (See FIG. 3A), as shown in FIG. 2, except that the blocking packer 114 is divided into a plurality of blocking packers 114A, 114B and 114C. The configuration is substantially the same as that of the first embodiment. That is, the groundwater pumping system 102 according to the second embodiment is applied (for example, 5 to 8 m) when the layer of the boundary area B3 between the upper freshwater area W3 and the lower saltwater area S3 is thick. Is preferred. Between the upper first pumping pump 11 attached to the cord 13 and the lower second pumping pump 12 corresponding to the boundary area B3, an upper cutoff is provided below the first pumping pump 11. The packer 114A is provided with the lower blocking packer 114B on the upper side of the second lift pump 12, and the middle blocking packer 114C is provided substantially in the middle between the upper and lower blocking packers 114A and 114B. In the present embodiment, the length of the blocking packers 114A to 114B is set to about 130 mm, but depending on the structure of the well 5, it may be set to an optimal length (for example, ten to several cm to several tens of cm). Is desirable. That is, in the case of a well having a large aperture ratio (a large number of holes through which water enters and exits), it is appropriate to make the well longer. As a result, the amount of high-pressure air pumped from the air compressor 16 can be reduced, and the size of the blocking packers 114A to 114C can be reduced, thereby achieving cost reduction. Moreover, the workability at the time of attachment improves. In the present embodiment, the blocking packers 114A to 114C are configured by being divided into three, but the present invention is not limited to this, and may be two corresponding to the boundary area B3, or three or more It goes without saying that it is good as well. Thus, in the groundwater pumping system 102 according to the present embodiment, the upper and lower communication can be blocked by the blocking packer 114 in accordance with the thickness even if the layer in the boundary area B3 is thick.

  Next, a groundwater pumping system 202 according to a third embodiment of the present invention will be described. In the groundwater pumping system 202 according to the third embodiment of the present invention, the groundwater pumping systems 2 and 102 according to the first and second embodiments are the same as the first and second pumping pumps 11 and 12 in one cord 13. And the shutoff packers 14, 114 are attached and moved up and down by the winch 17, as shown in FIG. 5A, the lower second lift pump 212 and the shutoff packers 214A, 214B are Attached to the first cord 213A, raised and lowered with the first winch 217A, attached the upper first lift pump 211 to the second cord 213B, raised and lowered with the second winch 217B, the upper first The lift pump 211 is moved up and down independently with respect to the lower second lift pump 212 and the blocking packers 214A and 214B. By adopting such a configuration, it is possible to respond promptly to changes in the condition of the aquifer 4.

  Next, a groundwater pumping system 302 according to a fourth embodiment of the present invention will be described. As shown in FIG. 5 (B), the groundwater pumping system 302 according to the fourth embodiment of the present invention relates to a modified example of the groundwater pumping system 2 according to the first embodiment, and is different from the first embodiment. The groundwater pumping system 2 concerned attaches the first and second pumping pumps 11 and 12 to the upper and lower sides of one cord 13 respectively, while in the case of a tsunami, etc., the fresh water zone W4 Corresponds to the case where the salt water area S4u is expressed on the upper side and the salt water area S4d is also present on the lower side of the fresh water area W4, and a pair of pumping pumps 311A, 312A and 311B, above and below the cord 13, respectively. The third embodiment has substantially the same configuration as that of the first embodiment except that a point 312B is attached and corresponding to a plurality of boundary areas B4u and B4d. In the groundwater pumping system 302 according to the present embodiment, the lower second pumping pump 312A of the upper pumping pumps 311A and 312A and the upper first pumping pump 311B of the lower pumping pumps 311B and 312B. Are arranged in the fresh water zone W4, and the other first pumping pump 311A among the upper pumping pumps 311A and 312A, and the lower second pumping pump among the lower pumping pumps 311B and 312B. Is arranged in the salt water areas S4u and S4d. Therefore, even when the saltwater area S4u appears above the freshwater area W4 as in the case of a tsunami, it can be coped with.

  FIG. 6: is a graph which shows the water level measurement result which measured progress of the water level with the apparatus of the structure substantially the same as the apparatus used for the groundwater pumping system concerning 1st Embodiment. According to the water level measurement results, after the water is stopped by the packer, the water level in the upper stage rises by 1.7 m, and high potential groundwater exists in the shallow layer (upper layer), and the upper layer (upper layer) and the lower layer (lower layer) It can be seen that the potential difference between In addition, it can be seen that the water level changes independently and is not affected by the opposite pumping pump that separates the packers. FIG. 7 is a graph showing the measurement results of the electric conductivity of the upper and lower portions of the blocking packer measured by the apparatus having substantially the same configuration as the apparatus used for the groundwater pumping system according to the first embodiment. It is. From the results of the measurement of the electrical conductivity, it can be seen that the electrical conductivity (ED) of the upper stage (upper freshwater zone) and the lower stage (lower saline zone) is maintained with the difference.

  In each of the above embodiments, the blocking packers 14, 114A to 114C, 214A, and 214B are formed of rubber bags having flexibility and elasticity, but the present invention is not limited thereto. It may be a bag. Also, although the clearance means is constituted by the blocking packer and the air compressor, it is possible to cut off the communication of the well at the time of operation and to retract freely from the inner surface of the well at the time of non-operation. Just do it.

3 above ground 4 aquifer 5 well 11 first pumping pump (pumping means)
12 Second pumping pump (pumping means)
13 cords (lifting means)
14 Shut-down packer (filler, filling means)
15 Packer pressure regulator (spacer means)
16 Air compressor (loading means)
17 winches (lifting means)
18 Pumping control system (Pumping means)
Vertical length of L1 blocking packer W1 Fresh water area S1 Salt water area (non-fresh water area)

Claims (10)

From the ground to the aquifer reaching at least two or more pumping means which are vertically separated and vertically lifted and lowered in the well built up and down, and disposed between the respective pumping means so as to be vertically lifted and lowered It has a predetermined length and has an expandable and contractible space in the horizontal direction. When expanded, the space is expanded to block communication between the upper and lower sides, and when reduced, the space from the inner surface of the well A clearance means for degenerating and lifting means for raising and lowering each of the pumping means and the filling portion, and at least one of the pumping means of the respective pumping means in the freshwater region of the aquifer, the other pumping means thereby respectively arranged in a non freshwater lifting means, along with elevating integrally with pumping means and the gap filling section that is disposed in a non freshwater these non fresh water pumping means disposed in freshwater It is raised and lowered independently for the pumping means and the gap filling part of the frequency band Groundwater pumping system which is characterized.   The interval between the pumping means disposed at the top and bottom is adjustable, and the filling part is composed of a plurality of types having different lengths in the vertical direction, and the fresh water area and the non-fresh water area of the aquifer obtained beforehand The groundwater pumping system according to claim 1, characterized in that the gap is selected and arranged according to the boundary area between them. Lifting means, that the pumping means and the gap filling section that is disposed on the lower side with elevating integrally with lifting independently pumping means disposed on the upper side with respect to these lower pumping means and the gap filling section The groundwater pumping system according to claim 1 or 2, characterized in that   The filling part of the filling means is divided and provided according to the boundary area between the freshwater area and the non-freshwater area of the aquifer. Groundwater pumping system. In the vicinity of each pumping means, there is provided a detecting means for detecting water pressure and water quality and outputting them to the outside, and based on the data detected by the detecting means, operate each pumping means, clearance means and lifting means groundwater pumping system according to any one of claims 1 to 4 is provided with a control means causing, characterized by being configured to move the respective pumping means and the gap filling section vertically in accordance with a variation in the border zone .   The pumping means comprises a pumping pump and a pumping pump control device, the detecting means comprises a water pressure sensor and a water quality sensor, and the clearance means is in communication with the shut-off packer via the shut-off packer and the pressure regulator, and a compressor capable of pumping air. The groundwater pumping system according to claim 5, characterized in that it comprises each of them. Ground water pumping system, at least two or more pumping means, which are vertically separated from each other in the well built up to the aquifer from the ground, and can be lifted and lowered freely, and can be lifted and lowered between these pumping means Vertically arranged, has a predetermined length in the vertical direction, and has a filling part which can expand and contract in the horizontal direction, and when expanding, the filling part is expanded to block communication between the upper and lower parts, and in reduction, the filling part And a lifting means for raising and lowering the respective pumping means and the filling portion, and the lifting means comprises a lifting means and a filling portion disposed in the non-fresh water region. Are integrally moved up and down, and the pumping means disposed in the fresh water zone are configured to be independently lifted and lowered with respect to the pumping means and gap portion on the non-freshwater zone side,
When down hanging by lifting means, down hanging each pumping means and the gap filling section by degenerating gap filling part, in freshwater of freshwater side of pumping means aquifer among the pumping means, the non-fresh water When pumping means band side reaches respectively in the non freshwater the down hanging down, to expand the gap filling part, after blocking communication of the upper and lower wells, ground water, characterized in that the pumping by the pumping means How to pump water.   The interval between the pumping means disposed at the top and bottom is adjustable, and the filling part is composed of a plurality of types having different lengths in the vertical direction, and the fresh water area and the non-fresh water area of the aquifer obtained beforehand Select the gap according to the boundary area between them, and stop the suspension when the space of the gap means is placed in the boundary area when suspending by the lifting means The groundwater pumping method of Claim 7 characterized by the above-mentioned. Lifting means, the pumping means and the gap filling section that is disposed on the lower side with lifting integrally to the pumping means disposed in the upper lifting independently for with these lower pumping means and the gap filling section configured to, when down hanging, after down hanging the pumping means and the gap filling section that is disposed on the lower side together, to claim 7 or 8, characterized in that down hanging pumping means disposed on the upper side Groundwater pumping method described. In the vicinity of each pumping means, there is provided a detecting means for detecting water pressure and water quality and outputting them to the outside, and based on the data detected by the detecting means, operate each pumping means, clearance means and lifting means a control means for, when detecting the variation of the boundary zone by the detection means, the control means to claims 7, characterized in that moving the respective pumping means and the gap filling section vertically in accordance with a variation in the border zone 9 Groundwater pumping method according to any one of the above.