CN216194853U - Quick precipitation structure of underground station foundation ditch - Google Patents

Abstract

The utility model discloses a quick dewatering structure for a foundation pit of an underground station, which comprises a dewatering pipe, a filtering and collecting device, a water pump and a driving device, wherein the filtering and collecting device is used for filtering and collecting underground water. The underground water filtering and collecting device is simple in structure and reasonable in design, and underground water in the ground layer around the downcomer is filtered and collected by the filtering and collecting device, so that the underground water flowing into the water collecting cavity is prevented from containing a large amount of impurities; the water pump is arranged to pump the underground water in the water collecting cavity, and the filtering pipe is used for filtering the underground water again when the water pumping pipe is used for pumping the underground water in the water collecting cavity, so that the water pumping pump is prevented from being blocked, the normal work of the water pumping pump is ensured, and the precipitation efficiency of the precipitation structure is further ensured; accelerate the groundwater seepage flow to the speed of catchmenting the intracavity in the stratum through setting up a plurality of filtration drainage tubes, and then accelerate the precipitation speed of this precipitation structure, shorten the precipitation time, solve the current not good problem of precipitation well precipitation drainage effect.

Description

Quick precipitation structure of underground station foundation ditch

Technical Field

The utility model belongs to the technical field of building construction, and particularly relates to a quick dewatering structure for a foundation pit of an underground station.

Background

With the increasing number of subway projects built and proposed in China, the subway projects can not avoid traversing sections with complicated engineering hydrogeological conditions, and an underground water seepage field is in a dynamic balance state before the subway projects are built. Along with the excavation of underground works and the formation of the face of vacancy, groundwater collects to the face of vacancy, oozes, form the infiltration of underground works excavation face, if do not take effective water collection drainage measure, with the drainage of rock face crack infiltration to the escape canal of underground works, the infiltration gathers after the lining wall is laid in a supporting way, water pressure increases, destroy the support body structure, make the engineering structure produce the infiltration, and the service life of engineering structure significantly reduces, make underground works strut simultaneously and waterproof construction go on under the condition of large tracts of land infiltration, the construction quality can't be guaranteed, lead to underground works to appear the infiltration easily in the operation process. At present, precipitation wells arranged at certain intervals are generally adopted in the industry for precipitation, underground water is introduced into the precipitation wells, then water in the precipitation wells is pumped out through a water pump, the speed of the underground water permeating into the precipitation wells is slow, the waiting time is long, and the precipitation and drainage effects of the precipitation wells are poor; and current suction pump does not set up filter equipment, causes the suction pump to block up easily, influences the precipitation efficiency of precipitation well.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the defects in the prior art are overcome, and the underground station foundation pit rapid dewatering structure is simple in structure and reasonable in design, and is used for rapidly dewatering the underground station foundation pit; accelerate the speed of groundwater seepage flow to catchment intracavity in the stratum through a plurality of filtration drainage tubes, solve the not good problem of current precipitation well precipitation drainage effect, the practicality is strong, convenient to popularize and use.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a quick dewatering structure of underground station foundation ditch which characterized in that: the underground water filtering and collecting device comprises a downcomer, a filtering and collecting device, a water pump and a driving device, wherein the filtering and collecting device is arranged on the downcomer and used for filtering and collecting underground water, the water pump is used for pumping the underground water in the filtering and collecting device, and the driving device is used for driving the water pump to work;

the downcomer comprises an upper tube body and a lower tube body connected with the upper tube body, the wall thickness of the lower tube body is of a hollow structure, a plurality of first side water permeable holes are formed in the outer side wall of the lower tube body, and a plurality of second side water permeable holes are formed in the inner side wall of the lower tube body;

the filtering and collecting device comprises a side filtering layer arranged in the hollow structure of the lower pipe body, a first side filtering film arranged on the inner side wall of the lower pipe body, a bottom filter arranged at the bottom of the lower pipe body, and a plurality of filtering drainage pipes which are arranged on the outer side wall of the lower pipe body, wherein the top surface of the bottom filter is matched with the inner side wall of the lower pipe body to form a water collecting cavity;

the water pumping device comprises two water pumping devices, each water pumping device comprises a water pumping pump, a water pumping pipe connected with the water pumping pump and a filtering pipe arranged at the end part of the water pumping pipe far away from the water pumping pump, and the filtering pipe extends into the water collecting cavity;

the driving device comprises an electronic circuit board and a liquid level sensor arranged in the water collecting cavity, a microcontroller and a wireless communication module connected with the microcontroller are integrated on the electronic circuit board, the output end of the liquid level sensor is connected with the input end of the microcontroller, and the water suction pump is controlled by the microcontroller.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the bottom filter comprises a box body, a bottom filter layer and a first bottom filtering membrane, wherein the bottom filter layer is arranged in the box body, the first bottom filtering membrane is arranged on the top surface of the box body, the top surface of the box body is fixedly connected with the bottom surface of the lower pipe body, a first bottom water permeable hole is formed in a bottom plate of the box body, and a second bottom water permeable hole is formed in a top plate of the box body.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the side filtering layer and the bottom filtering layer are both paved by pebbles.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the filtering drainage tubes are distributed on the lower tube body in an array manner, the structures of the filtering drainage tubes are the same, each filtering drainage tube comprises a tube body and a second side filtering membrane arranged on the outer side wall of the tube body, a plurality of third side water-permeable holes are formed in the tube body, and the third side water-permeable holes are distributed on the tube body in an array manner;

the pipe body is obliquely arranged, one end of the pipe body, far away from the lower pipe body, is positioned outside the lower pipe body, one end of the pipe body, near the lower pipe body, extends into the water collection cavity, the pipe body inclines downwards from one end, far away from the lower pipe body, to one end, near the lower pipe body, and an acute angle included angle formed between the central axis of the pipe body and the central axis of the lower pipe body is 30-60 degrees.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the end part of the pipe body extending into the water collecting cavity is provided with a one-way valve.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the filter pipe comprises a filter pipe body communicated with the water pumping pipe, a third side filtering film arranged on the outer side wall of the filter pipe body, a baffle arranged at the bottom of the filter pipe body and used for plugging the filter pipe body, and a second bottom filtering film arranged on the bottom surface of the baffle, wherein a plurality of fourth side water permeable holes are formed in the filter pipe body, and a plurality of third bottom water permeable holes are formed in the baffle.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the top of the filtering pipe body is in threaded connection with the end part, far away from the water suction pump, of the water suction pipe.

Foretell quick dewatering structure of underground station foundation ditch, its characterized in that: the electronic circuit board is arranged in the driving box, a display screen is arranged on the driving box, and the display screen is controlled by the microcontroller. Compared with the prior art, the utility model has the following advantages:

1. the filtering and collecting device is arranged to filter and collect underground water in the ground layer around the precipitation pipe, the filtering and collecting device comprises the side filtering layer, the first side filtering membrane, the bottom filter and the filtering drainage pipe, the side filtering layer and the first side filtering membrane form the side filter to carry out double filtering on the side underground water in the ground layer, and the bottom filter carries out double filtering on the bottom underground water in the ground layer, so that the underground water flowing into the water collecting cavity is prevented from containing a large amount of impurities, the normal work of the water suction pump is ensured, and the use reliability of the precipitation structure is further ensured.

2. The drainage device is provided with the plurality of filtering drainage tubes, the filtering drainage tubes are communicated with the water collecting cavity, the filtering drainage tubes extend into a stratum around the dewatering tubes, and the tube bodies of the filtering drainage tubes are of hollow structures, so that underground water on the side parts in the stratum can quickly seep into the tube bodies and flow into the water collecting cavity through the tube bodies, the seepage speed of the underground water in the stratum into the water collecting cavity is effectively increased, the dewatering speed of the dewatering structure is increased, the dewatering time is shortened, and the problem that the dewatering effect of the existing dewatering well is poor is solved.

3. According to the utility model, the water pump is arranged to pump the underground water in the water collection cavity, the water pump comprises the water pump, the water pumping pipe and the filtering pipe, the underground water is filtered again when the water pumping pipe is used for pumping the underground water in the water collection cavity, so that the phenomenon that the water pump is blocked due to the fact that a small amount of impurities in the underground water in the water collection cavity enter the water pumping pipe along with the underground water is avoided, the normal work of the water pump is ensured, the precipitation efficiency of the precipitation structure is further ensured, and the service life of the water pump is effectively prolonged.

In conclusion, the underground water filtering and collecting device is simple in structure and reasonable in design, and can be used for filtering and collecting underground water in the ground layer around the downcomer by arranging the filtering and collecting device, so that the underground water flowing into the water collecting cavity is prevented from containing a large amount of impurities; the water pump is arranged to pump the underground water in the water collecting cavity, and the filtering pipe is used for filtering the underground water again when the water pumping pipe is used for pumping the underground water in the water collecting cavity, so that the water pumping pump is prevented from being blocked, the normal work of the water pumping pump is ensured, and the precipitation efficiency of the precipitation structure is further ensured; accelerate the groundwater seepage flow to the speed of catchmenting the intracavity in the stratum through setting up a plurality of filtration drainage tubes, and then accelerate the precipitation speed of this precipitation structure, shorten the precipitation time, solve the current not good problem of precipitation well precipitation drainage effect.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of fig. 1 at B.

Fig. 4 is a schematic block diagram of the circuit of the present invention.

Description of reference numerals:

1-a downcomer pipe; 1-feeding the tube body; 1-2-lower tube body;

2-first side water permeable holes; 3-side filter layer; 4-a first side filter membrane;

5, a water collecting cavity; 6, a water pump; 7, a water pumping pipe;

8-a liquid level sensor; 9-a microcontroller; 10-a wireless communication module;

11-a box body; 12-bottom filter layer; 13 — a first bottom filtration membrane;

14-first bottom water-permeable holes; 15-second bottom water-permeable holes; 16-a pipe body;

17 — a second side filter membrane; 18-third side water permeable holes; 19-a filtering pipe body;

20 — a third side filter membrane; 21-a baffle plate; 22 — a second bottom filtration membrane;

23-fourth side water permeable holes; 24-a third bottom water permeable hole; 25-a drive box;

26-a display screen; 27-the earth formation; 28-a one-way valve;

29-second side permeable holes.

Detailed Description

As shown in fig. 1 to 4, the utility model comprises a downcomer 1 and a filtering and collecting device arranged on the downcomer 1 and used for filtering and collecting groundwater, a water pump used for pumping groundwater in the filtering and collecting device and a driving device used for driving the water pump to work;

the downcomer 1 comprises an upper pipe body 1-1 and a lower pipe body 1-2 connected with the upper pipe body 1-1, the wall thickness of the lower pipe body 1-2 is a hollow structure, a plurality of first side water permeable holes 2 are formed in the outer side wall of the lower pipe body 1-2, and a plurality of second side water permeable holes 29 are formed in the inner side wall of the lower pipe body 1-2;

the filtering and collecting device comprises a side filtering layer 3 arranged in a hollow structure of the lower pipe body 1-2, a first side filtering membrane 4 arranged on the inner side wall of the lower pipe body 1-2, a bottom filter arranged at the bottom of the lower pipe body 1-2, and a plurality of filtering drainage pipes which are arranged on the outer side wall of the lower pipe body 1-2, wherein the top surface of the bottom filter is matched with the inner side wall of the lower pipe body 1-2 to form a water collecting cavity 5;

the number of the water pumping devices is two, each water pumping device comprises a water pumping pump 6, a water pumping pipe 7 connected with the water pumping pump 6 and a filtering pipe arranged at the end part, far away from the water pumping pump 6, of the water pumping pipe 7, and the filtering pipe extends into the water collecting cavity 5;

drive arrangement includes electronic circuit board and the level sensor 8 of setting in the chamber 5 that catchments, the last integration of electronic circuit board has microcontroller 9 and the wireless communication module 10 that meets with microcontroller 9, level sensor 8's output is connected with microcontroller 9's input, suction pump 6 is controlled by microcontroller 9.

In the embodiment, it should be noted that the lower pipe body 1-2 of the precipitation pipe 1 is matched with the box body 11 to form the water collecting cavity 5, and the water collecting cavity 5 is used as a temporary storage container for underground water, so that the precipitation pipe 1 is convenient to install and fast in installation speed, and precipitation time is effectively saved; the underground water in the stratum 27 around the downcomer 1 is filtered and collected by arranging the filtering and collecting device, the filtering and collecting device comprises a side filtering layer 3, a first side filtering film 4, a bottom filter and a filtering drainage tube, the side filtering layer 3 and the first side filtering film 4 form the side filter, the side underground water in the stratum 27 is filtered for the first time through the side filtering layer 3, the side underground water after the first filtering is filtered for the second time through the first side filtering film 4, the double filtering of the side underground water is realized, the double filtering of the bottom underground water in the stratum 27 is realized through the bottom filter, and the underground water in the water collecting cavity 5 is prevented from containing a large amount of impurities; the water suction pump 6 is used for sucking the underground water in the water collection cavity 5, the filtering pipe is arranged at the bottom of the water suction pipe 7, the underground water is filtered again when the water suction pipe 7 is used for sucking the underground water in the water collection cavity 5, the phenomenon that the water suction pump 6 is blocked due to the fact that a small amount of impurities in the underground water in the water collection cavity 5 enter the water suction pipe 7 along with the underground water is avoided, normal work of the water suction pump 6 is guaranteed, the precipitation efficiency and the use reliability of the precipitation structure are further guaranteed, and the service life of the water suction pump 6 is effectively prolonged;

the number of the filtering drainage tubes is multiple, the filtering drainage tubes are communicated with the water collecting cavity 5, the filtering drainage tubes extend into a stratum 27 around the precipitation tube 1, and a tube body 16 of each filtering drainage tube is of a hollow structure, so that the lateral underground water in the stratum 27 can quickly seep into the tube body 16 and flows into the water collecting cavity 5 through the tube body 16, the speed of seepage of the underground water in the stratum 27 into the water collecting cavity 5 is effectively increased, and the precipitation speed of the precipitation structure is increased;

the two water pumps are respectively a first water pump and a second water pump, the liquid level height of underground water in the water collecting cavity 5 is detected in real time by arranging a liquid level sensor 8, a liquid level measured value detected by the liquid level sensor 8 is transmitted to a microcontroller 9, when the liquid level measured value detected by the liquid level sensor 8 is smaller than a first liquid level set value, a water pump 6 of the first water pump and a water pump 6 of the second water pump do not work, and at the moment, underground water is not flushed into the water collecting cavity 5; when the liquid level measurement value detected by the liquid level sensor 8 is greater than the first liquid level set value and the liquid level measurement value detected by the liquid level sensor 8 is less than the second liquid level set value, the microcontroller 9 controls the water suction pump 6 of the first water suction device to work to pump the underground water in the water collection cavity 5; when the liquid level measurement value detected by the liquid level sensor 8 is greater than the second liquid level set value, it is shown that the speed of the groundwater in the stratum 27 flowing into the water collecting cavity 5 is high, and the groundwater in the water collecting cavity 5 can not be extracted only through the first water pumping device, so that the microcontroller 9 controls the water pumping pump 6 of the first water pumping device and the water pumping pump 6 of the second water pumping device to work simultaneously to extract the groundwater in the water collecting cavity 5, rapid precipitation is realized, and the precipitation efficiency is high.

In this embodiment, in actual use, the liquid level sensor 8 is preferably a star finder CYW11 throw-in type liquid level sensor, and the liquid level sensor 8 detects the liquid level height of the groundwater in the water collecting cavity 5 in real time; microcontroller 9 is preferably STM32F103C8T6 microcontroller, and wireless communication module 10 is preferably wireless communication module 12 and is the ATK-ESP8266WIFI module, facilitates the level data measured value that level sensor 8 detected with setting up wireless communication module 10 remote transmission to the cell-phone or the computer that monitoring personnel carried with one's body.

As shown in fig. 1, in this embodiment, the bottom filter includes a box 11, a bottom filter layer 12 disposed in the box 11, and a first bottom filter membrane 13 disposed on a top surface of the box 11, the top surface of the box 11 is fixedly connected to a bottom surface of the lower pipe body 1-2, a bottom plate of the box 11 is provided with a first bottom water permeable hole 14, and a top plate of the box 11 is provided with a second bottom water permeable hole 15.

In this embodiment, carry out double filtration to bottom groundwater when the bottom groundwater seepage flow that lies in downcomer 1 bottom in stratum 27 through setting up the bottom filter to catchmenting chamber 5, bottom groundwater gets into in box 11 through first bottom hole 14 of permeating water earlier, bottom filter layer 12 in the box 11 filters the impurity of bottom groundwater once, bottom filter layer 12 filters the back once to bottom groundwater, bottom groundwater loops through second bottom hole 15 and first bottom filtration membrane 13 of permeating water again and flows into in catchmenting chamber 5, and simultaneously, first bottom filtration membrane 13 carries out secondary filtration to the bottom groundwater after once filtering, make the lateral part groundwater that flows into in catchmenting chamber 5 and bottom groundwater contain a large amount of impurity, the filter effect is good.

In this embodiment, during the in-service use, the quantity of first bottom hole 14 of permeating water and second bottom hole 15 of permeating water is a plurality ofly, and a plurality of first bottom holes 14 of permeating water are arranged on the bottom plate of box 11 for array, and a plurality of second bottom holes 15 of permeating water are arranged on the roof of box 11 for array.

In the present embodiment, as shown in fig. 1, the side filter layers 3 and the bottom filter layer 12 are each laid with pebbles.

In this embodiment, the side filter layers 3 and the bottom filter layer 12 may be formed of sand in actual use.

As shown in fig. 1 and 2, in this embodiment, a plurality of filtering draft tubes are arranged on a lower tube body 1-2 in an array manner, the structures of the plurality of filtering draft tubes are the same, each filtering draft tube comprises a tube body 16 and a second side filtering membrane 17 arranged on the outer side wall of the tube body 16, a plurality of third side water-permeable holes 18 are formed in the tube body 16, and a plurality of the third side water-permeable holes 18 are arranged on the tube body 16 in an array manner;

the pipe bodies 16 are obliquely arranged, one end of each pipe body 16, far away from the lower pipe body 1-2, is positioned on the outer side of the lower pipe body 1-2, one end, close to the lower pipe body 1-2, of each pipe body 16 extends into the water collecting cavity 5, the pipe bodies 16 are obliquely downwards inclined from one end, far away from the lower pipe body 1-2, to one end, close to the lower pipe body 1-2, of each pipe body 16, and an acute included angle formed between the central axis of each pipe body 16 and the central axis of the lower pipe body 1-2 is 30-60 degrees.

In this embodiment, be provided with second lateral part filtration membrane 17 on the lateral wall of body 16, when lateral part groundwater was in through 18 seepage flows to body 16 of third lateral part water permeation hole, second lateral part filtration membrane 17 filters lateral part groundwater earlier, avoids the impurity in the lateral part groundwater to block up 18 third lateral part water permeation holes on the body 16, improves the use reliability of filtering the drainage tube.

In this embodiment, the pipe 16 is disposed in an inclined manner, so that the groundwater seeping into the pipe 16 flows into the water collecting cavity 5 under the action of gravity.

In the present embodiment, as shown in fig. 1 and 2, the end of the pipe 16 extending into the water collecting chamber 5 is provided with a check valve 28.

In this embodiment, the check valve 28 is disposed at the end of the pipe body 16 extending into the water collecting cavity 5, so as to prevent the groundwater in the water collecting cavity 5 from flowing back into the pipe body 16, and further prevent the groundwater in the water collecting cavity 5 from flowing back into the ground layer 27.

In this embodiment, the filtering pipe includes a filtering pipe body 19 communicated with the pumping pipe 7, a third side filtering membrane 20 disposed on the outer side wall of the filtering pipe body 19, a baffle 21 disposed at the bottom of the filtering pipe body 19 and used for plugging the filtering pipe body 19, and a second bottom filtering membrane 22 disposed at the bottom of the baffle 21, a plurality of fourth side water permeable holes 23 are disposed on the filtering pipe body 19, and a plurality of third bottom water permeable holes 24 are disposed on the baffle 21.

In the embodiment shown in fig. 3, the top of the filtering tube 19 is screwed to the end of the pumping pipe 7 far from the pumping pump 6.

In this embodiment, the top of the filtering pipe 19 is detachably connected to the bottom of the lower pipe 1-2, so that the filtering pipe 19 can be conveniently detached to clean and replace the filtering pipe 19.

As shown in fig. 1 and 4, in the present embodiment, the electronic circuit board is disposed in a driving box 25, a display screen 26 is disposed on the driving box 25, and the display screen 26 is controlled by the microcontroller 9.

In this embodiment, drive box 25 is located subaerial, shows the liquid level measurement value that level sensor 8 detected through setting up display screen 26, and the staff of being convenient for directly learns the liquid level height of the groundwater in the chamber of catchmenting 5.

When the underground water drainage device is used specifically, before a foundation pit is excavated, the underground water drainage structure is placed in a pre-drilled underground water drainage pit, one part of the side part of the underground water in the stratum 27 around the underground water drainage pipe 1 seeps into the water collection cavity 5 through the side wall of the lower pipe body 1-2, the other part of the side part of the underground water in the stratum 27 around the underground water drainage pipe 1 seeps into the water collection cavity 5 through the plurality of filtering drainage pipes, when one part of the side part of the underground water seeps into the water collection cavity 5 through the side wall of the lower pipe body 1-2, the side part of the underground water firstly enters the side part filter layer 3 through the first side part permeable holes 2 on the outer side wall of the lower pipe body 1-2, the side part of the underground water is filtered by the side part filter layer 3 for the first time, and then flows into the water collection cavity 5 through the second side part permeable holes 29 and the first side part filter film 4 in sequence, the first side filtering membrane 4 is used for carrying out secondary filtering on the side groundwater after primary filtering; when the other part of the lateral groundwater seeps into the water collecting cavity 5 through the plurality of filtering draft tubes, the lateral groundwater seeps into the tube body 16 through the second lateral filtering membrane 17 and the third lateral permeable holes 18 in sequence, the lateral groundwater of the second lateral filtering membrane 17 is filtered, and the lateral groundwater in the tube body 16 flows into the water collecting cavity 5 under the action of the gravity of the lateral groundwater; bottom groundwater in a stratum 27 around the downcomer 1 seeps into the water collection cavity 5 through a bottom filter, the bottom groundwater firstly enters the box body 11 through the first bottom water permeable hole 14, the bottom filter layer 12 in the box body 11 filters impurities in the bottom groundwater for the first time, after the bottom groundwater is filtered by the bottom filter layer 12 for the first time, the bottom groundwater sequentially flows into the water collection cavity 5 through the second bottom water permeable hole 15 and the first bottom filter membrane 13, and the first bottom filter membrane 13 filters the primarily filtered bottom groundwater for the second time, so that the lateral part groundwater and the bottom groundwater flowing into the water collection cavity 5 do not contain a large amount of impurities;

when underground water flows into the water collection cavity 5 in a seepage mode, the liquid level sensor 8 detects the liquid level height of underground water in the water collection cavity 5 in real time, the water suction pump 6 of the first water pump and the water suction pump 6 of the second water pump are controlled to work according to a liquid level measured value detected by the liquid level sensor 8, and when the liquid level measured value detected by the liquid level sensor 8 is smaller than a first liquid level set value, the water suction pump 6 of the first water pump and the water suction pump 6 of the second water pump do not work; when the liquid level measurement value detected by the liquid level sensor 8 is greater than the first liquid level set value and the liquid level measurement value detected by the liquid level sensor 8 is less than the second liquid level set value, the microcontroller 9 controls the water suction pump 6 of the first water suction device to work to pump the underground water in the water collection cavity 5; when the liquid level measurement value detected by the liquid level sensor 8 is larger than the second liquid level set value, the microcontroller 9 controls the water suction pump 6 of the first water pump and the water suction pump 6 of the second water pump to work simultaneously to pump the underground water in the water collection cavity 5;

when the suction pump 6 extracts the groundwater in the water collecting cavity 5, the groundwater in the water collecting cavity 5 can enter the filtering pipe body 19 through the third side filtering membrane 20 and the second bottom filtering membrane 22 on the filtering pipe body 19, the third side filtering membrane 20 and the second bottom filtering membrane 22 filter the groundwater in the water collecting cavity 5 again, the phenomenon that the suction pump 6 is blocked due to the fact that a small amount of impurities in the groundwater in the water collecting cavity 5 enter the suction pipe 7 along with the groundwater is avoided, the normal work of the suction pump 6 is guaranteed, the precipitation efficiency and the use reliability of the precipitation structure are guaranteed, and the service life of the suction pump 6 is effectively prolonged. The underground water filtering and collecting device is simple in structure and reasonable in design, and underground water in the ground layer around the downcomer is filtered and collected by the filtering and collecting device, so that the underground water flowing into the water collecting cavity is prevented from containing a large amount of impurities; the water pump is arranged to pump the underground water in the water collecting cavity, and the filtering pipe is used for filtering the underground water again when the water pumping pipe is used for pumping the underground water in the water collecting cavity, so that the water pumping pump is prevented from being blocked, the normal work of the water pumping pump is ensured, and the precipitation efficiency of the precipitation structure is further ensured; accelerate the groundwater seepage flow to the speed of catchmenting the intracavity in the stratum through setting up a plurality of filtration drainage tubes, and then accelerate the precipitation speed of this precipitation structure, shorten the precipitation time, solve the current not good problem of precipitation well precipitation drainage effect.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (8)

1. The utility model provides a quick dewatering structure of underground station foundation ditch which characterized in that: the underground water filtering and collecting device comprises a downcomer (1), a filtering and collecting device, a water pump and a driving device, wherein the filtering and collecting device is arranged on the downcomer (1) and is used for filtering and collecting underground water, the water pump is used for pumping the underground water in the filtering and collecting device, and the driving device is used for driving the water pump to work;

the downcomer (1) comprises an upper pipe body (1-1) and a lower pipe body (1-2) connected with the upper pipe body (1-1), the wall thickness of the lower pipe body (1-2) is of a hollow structure, a plurality of first side water permeable holes (2) are formed in the outer side wall of the lower pipe body (1-2), and a plurality of second side water permeable holes (29) are formed in the inner side wall of the lower pipe body (1-2);

the filtering and collecting device comprises a side filtering layer (3) arranged in a hollow structure of the lower pipe body (1-2), a first side filtering membrane (4) arranged on the inner side wall of the lower pipe body (1-2), a bottom filter arranged at the bottom of the lower pipe body (1-2), and a plurality of filtering drainage pipes which are arranged on the outer side wall of the lower pipe body (1-2), wherein the top surface of the bottom filter is matched with the inner side wall of the lower pipe body (1-2) to form a water collecting cavity (5);

the number of the water pumping devices is two, each water pumping device comprises a water pumping pump (6), a water pumping pipe (7) connected with the water pumping pump (6) and a filtering pipe arranged at the end part, far away from the water pumping pump (6), of the water pumping pipe (7), and the filtering pipe extends into the water collecting cavity (5);

drive arrangement includes electronic circuit board and liquid level sensor (8) of setting in the chamber of catchmenting (5), integrated wireless communication module (10) that have microcontroller (9) and meet with microcontroller (9) on the electronic circuit board, the output of liquid level sensor (8) is connected with the input of microcontroller (9), suction pump (6) are controlled by microcontroller (9).

2. A quick dewatering structure of underground station foundation pit according to claim 1, characterized in that: the bottom filter comprises a box body (11), a bottom filter layer (12) arranged in the box body (11) and a first bottom filtering membrane (13) arranged on the top surface of the box body (11), the top surface of the box body (11) is fixedly connected with the bottom surface of a lower pipe body (1-2), a first bottom water permeable hole (14) is formed in a bottom plate of the box body (11), and a second bottom water permeable hole (15) is formed in a top plate of the box body (11).

3. A quick dewatering structure of underground station foundation pit according to claim 2, characterized in that: the side filtering layer (3) and the bottom filtering layer (12) are paved by pebbles.

4. A quick dewatering structure of underground station foundation pit according to claim 1, characterized in that: the plurality of filtering drainage tubes are distributed on the lower tube body (1-2) in an array manner, the structures of the plurality of filtering drainage tubes are the same, each filtering drainage tube comprises a tube body (16) and a second side filtering membrane (17) arranged on the outer side wall of the tube body (16), a plurality of third side water-permeable holes (18) are formed in the tube body (16), and the plurality of third side water-permeable holes (18) are distributed on the tube body (16) in an array manner;

the pipe bodies (16) are obliquely arranged, one end, far away from the lower pipe body (1-2), of each pipe body (16) is located on the outer side of the lower pipe body (1-2), one end, close to the lower pipe body (1-2), of each pipe body (16) extends into the water collecting cavity (5), each pipe body (16) is inclined downwards from one end, far away from the lower pipe body (1-2), to one end, close to the lower pipe body (1-2), of each pipe body, and an acute included angle formed between a central axis of each pipe body (16) and a central axis of the lower pipe body (1-2) ranges from 30 degrees to 60 degrees.

5. A quick dewatering structure of underground station foundation ditch according to claim 4, characterized in that: the end part of the pipe body (16) extending into the water collecting cavity (5) is provided with a one-way valve (28).

6. A quick dewatering structure of underground station foundation pit according to claim 1, characterized in that: the filter pipe comprises a filter pipe body (19) communicated with the water pumping pipe (7), a third side filter membrane (20) arranged on the outer side wall of the filter pipe body (19), a baffle (21) arranged at the bottom of the filter pipe body (19) and used for plugging the filter pipe body (19), and a second bottom filter membrane (22) arranged on the bottom surface of the baffle (21), wherein a plurality of fourth side water permeable holes (23) are formed in the filter pipe body (19), and a plurality of third bottom water permeable holes (24) are formed in the baffle (21).

7. A quick dewatering structure of underground station foundation ditch according to claim 6, characterized in that: the top of the filtering pipe body (19) is in threaded connection with the end part, far away from the water suction pump (6), of the water suction pipe (7).

8. A quick dewatering structure of underground station foundation pit according to claim 1, characterized in that: the electronic circuit board is arranged in a driving box (25), a display screen (26) is arranged on the driving box (25), and the display screen (26) is controlled by a microcontroller (9).

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