A house building construction site drainage system

Abstract

The application relates to a house building construction site drainage system, which comprises a water collecting tank, a main drainage mechanism, a first vertical water storage cylinder arranged in the water collecting tank, a first water inlet ring plate arranged on the top of the first vertical water storage cylinder, a plurality of first water filtering holes arranged on the first water inlet ring plate, a first drainage pipe connected to the bottom of the first vertical water storage cylinder, and a main liquid pumping machine connected to the first drainage pipe; a standby drainage mechanism, a second vertical water storage cylinder arranged in the water collecting tank, a second water inlet ring plate arranged on the top of the second vertical water storage cylinder and higher than the first water inlet ring plate, a plurality of second water filtering holes arranged on the second water inlet ring plate, a second drainage pipe connected to the bottom of the second vertical water storage cylinder, and a standby liquid pumping machine connected to the second drainage pipe; and a sludge screw conveyor used for pumping and draining sludge at the bottom of the water collecting tank. The application can effectively realize water level lowering treatment and automatic sludge cleaning under the condition of unattended service.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage in a building construction process, and in particular to a drainage system for a building construction site. Background Art

[0002] During the construction of buildings, foundation pit construction is often required. During the foundation pit construction process, most of the time, a corresponding drainage system needs to be set up to lower the water level at the foundation pit construction site.

[0003] Currently, when dewatering foundation pit construction sites, dewatering wells are typically installed at corresponding locations on the site. Water is then collected through the dewatering wells and pumped out using pumps. This dewatering process has the following drawbacks: 1) The pumps must be manually monitored during the dewatering process. When the water level drops to a certain level, the pumps must be shut down immediately to prevent idling and damage. Furthermore, when the pumps' continuous operation still cannot meet the dewatering capacity, a temporary backup pump must be manually added, which is very troublesome. 2) The water collected in the dewatering wells typically undergoes only a simple sand and gravel filtration process, resulting in a high level of silt. When the silt accumulation reaches a certain level, it must be cleaned up promptly. Otherwise, the dewatering efficiency of the deep construction site may be affected or the pumps may become clogged and damaged, further complicating the dewatering process.

[0004] Therefore, the research purpose of this invention is to design a drainage system for construction sites that can effectively achieve water level reduction treatment at construction sites under the premise of unmanned operation; effectively improve the convenience and adaptability of water level reduction treatment; and realize automatic cleaning of silt. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a drainage system for a building construction site, which can effectively solve the problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A drainage system for a building construction site, comprising

[0008] A water collection trough pre-buried below the foundation pit ground, with a plurality of corresponding water holes provided on the side wall of the water collection trough;

[0009] The main drainage mechanism includes a first vertical water storage cylinder fixed in the water collection tank, the top of the first vertical water storage cylinder is horizontally folded outward to provide a corresponding first water inlet ring plate, the outer edge of the first water inlet ring plate is upwardly connected to a first water retaining plate having a diameter larger than that of the first vertical water storage cylinder, and the first water inlet ring plate is evenly distributed with a plurality of corresponding first water filter holes; the bottom of the first vertical water storage cylinder is sealed and connected to the bottom surface of the water collection tank, and a corresponding first liquid level sensor is fixed on the upper side of the bottom of the first vertical water storage cylinder, the bottom of the first vertical water storage cylinder is upwardly connected to a corresponding first drainage pipe, and the first drainage pipe is connected to the corresponding main liquid pump;

[0010] The backup drainage mechanism includes a second vertical water storage cylinder fixed in the water collection tank, the top of the second vertical water storage cylinder is horizontally folded outward to provide a second water inlet ring plate positioned higher than the first water inlet ring plate, the outer edge of the second water inlet ring plate is upwardly connected to a second water retaining plate having a diameter larger than that of the second vertical water storage cylinder, and the second water inlet ring plate is evenly distributed with a plurality of corresponding second water filter holes; the bottom of the second vertical water storage cylinder is sealed and connected to the bottom surface of the water collection tank, and a corresponding second liquid level sensor is fixed on the upper side of the bottom of the second vertical water storage cylinder, the bottom of the second vertical water storage cylinder is upwardly connected to a corresponding second drainage pipe, and the second drainage pipe is connected to a corresponding backup liquid pump;

[0011] The silt screw conveyor is used to pump out the silt at the bottom of the water collection tank. The feed end of the silt screw conveyor is set at the bottom of the water collection tank, and the discharge end of the silt screw conveyor is set at the top outside of the water collection tank.

[0012] A control system, wherein the first liquid level sensor and the second liquid level sensor are respectively connected to the control system, and the working processes of the main liquid pumping pump, the standby liquid pump, and the sludge screw conveyor are controlled by the control system.

[0013] When the first liquid level sensor senses that the height of the water entering the first vertical water storage cylinder along the first water filter hole reaches the position of the first liquid level sensor, the main liquid pump starts to drain water; when the water level in the first vertical water storage cylinder is lower than the position of the first liquid level sensor, the main liquid pump stops.

[0014] When the second liquid level sensor senses that the height of the water entering the second vertical water storage cylinder along the second water filter hole reaches the position of the second liquid level sensor, the standby liquid pump starts to drain water; when the water height in the second vertical water storage cylinder is lower than the position of the second liquid level sensor, the standby liquid pump stops.

[0015] The time required for the standby liquid pump to completely pump out the water with a volume equal to that of the second vertical water storage cylinder and the second water retaining wall is set to t; when the water level in the first vertical water storage cylinder is lower than the position of the first liquid level sensor, and the standby liquid pump has been running continuously for t, and the water level in the second vertical water storage cylinder is still higher than the position of the second liquid level sensor, the sludge screw conveyor starts to pump out the sludge.

[0016] The outer wall fixing device of the first vertical water storage cylinder has a corresponding abutting protrusion, and a corresponding suspended sealing plate is movably sleeved on the first vertical water storage cylinder on the upper side of the abutting protrusion. The top surface of the suspended sealing plate is set to a flat shape that is compatible with the first water inlet ring plate, and the bottom surface of the suspended sealing plate is set to a conical surface.

[0017] The suspension sealing plate is made of a material with a density of 1.14 g / cm 3 Made of PA nylon.

[0018] The water collecting trough; the first vertical water storage cylinder, the first water inlet ring plate and the first water retaining plate; and the second vertical water storage cylinder, the second water inlet ring plate and the second water retaining plate are all formed by integrated molding of engineering plastics.

[0019] The bottom surface of the water collection tank is provided with corresponding plug-in cylinders at positions corresponding to the first vertical water storage cylinder and the second vertical water storage cylinder. The bottoms of the first vertical water storage cylinder and the second vertical water storage cylinder are sealed and plugged into the plug-in cylinders by gluing.

[0020] A layer of sand and gravel for pre-filtration is filled between the water collecting trough and the foundation pit.

[0021] Corresponding filter covers are respectively installed at the bottom of the first drain pipe and the second drain pipe.

[0022] Advantages of the present invention:

[0023] 1) The main drainage mechanism of the present invention includes a first liquid level sensor on the upper bottom fixing device of the first vertical water storage tank. When the first liquid level sensor senses that the height of the water entering the first vertical water storage tank through the first water filter hole reaches the position of the first liquid level sensor, the main liquid pump starts to drain water. When the water level in the first vertical water storage tank falls below the position of the first liquid level sensor, the main liquid pump stops, thereby effectively achieving water level reduction at the construction site under unattended conditions.

[0024] 2) On the basis of the main drainage mechanism, the present invention is further provided with a backup drainage mechanism, wherein the height of the second water inlet ring plate provided on the top of the second vertical water storage cylinder of the backup drainage mechanism is higher than the first water inlet ring plate of the main drainage mechanism. In other words, only when the amount of water entering the water collection tank exceeds the pumping capacity of the main liquid pump, and the water level further rises to the height of the second water inlet ring plate, can it enter the second vertical water storage cylinder along the second water filter hole. Therefore, when the second liquid level sensor senses that the height of the water entering the second vertical water storage cylinder reaches the position of the second liquid level sensor, it can be judged that the amount of water entering the water collection tank exceeds the pumping capacity of the main liquid pump. At this time, the backup liquid pump can be started to start drainage, thereby effectively ensuring the convenience and adaptability of water level reduction processing under the premise of unattended operation.

[0025] 3) Based on the main drainage mechanism and the backup drainage mechanism, the present invention further provides a silt screw conveyor to realize automatic drainage of the silt at the bottom of the water collection tank while lowering the water level. The present invention first sets the time t for the backup liquid pump to drain the water with a volume equal to the second vertical water storage cylinder and the second water retaining plate; when the water level in the first vertical water storage cylinder is lower than the location of the first liquid level sensor, and the backup liquid pump has been running continuously for a period of t, and the water level in the second vertical water storage cylinder is still higher than the location of the second liquid level sensor, it can be determined that the first water filter hole on the first water inlet ring plate is blocked by the deposited silt, resulting in the inability of water to flow normally into the first vertical water storage cylinder; at the same time, water is still continuously entering the water collection tank, so the water above the silt can continue to enter the second vertical water storage cylinder. Therefore, after the backup liquid pump has been running continuously for a period of t, the water level in the second vertical water storage cylinder may still be higher than the location of the second liquid level sensor. At this time, the sludge screw conveyor can be started to pump out the sludge whose sedimentation height reaches the set value, thereby further realizing the automatic cleaning of the sludge without human supervision.

[0026] 4) When the deposited silt blocks the first water filter hole, a situation may occur where the pumping capacity of the standby liquid pump is less than the amount of water entering the sump, then the water level in the sump will further rise, thereby increasing the pressure. In severe cases, more silt will be squeezed into the first vertical water storage cylinder, thereby causing problems with the subsequent drainage of the main liquid pump. To this end, the present invention further provides a corresponding abutting ridge on the outer wall fixing device of the first vertical water storage cylinder, and a corresponding suspended sealing plate is movably sleeved on the first vertical water storage cylinder on the upper side of the abutting ridge, the top surface of the suspended sealing plate is configured to be flat and compatible with the first water inlet ring plate, the bottom surface of the suspended sealing plate is configured to be conical, and the suspended sealing plate is made of a material with a density of 1.14 g / cm 3 Made of PA nylon.

[0027] Since the density of the suspended seal is greater than that of the water, it will initially be fixed against the abutment ridge. As the silt settles, it will gradually lift the suspended seal. This is because the density of the silt after water, that is, the wet density of the silt, can reach 1.14 g / cm 3 Therefore, the deposited silt will gradually lift the suspended sealing plate, so that its top surface will eventually be blocked on the lower side of the first water inlet ring plate, thereby compensating for the blockage of the first water filter hole of the first water inlet ring plate by the silt, so as to prevent the silt from excessively entering the first vertical water storage cylinder, thereby realizing the automatic cleaning of the silt by the present invention, thereby ensuring the practical effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 This is a diagram of the present invention in use when entering sludge pumping and drainage.

[0030] Figure 3 Schematic diagram of the structure of the main drainage mechanism.

[0031] Figure 4 This is a structural diagram of the backup drainage mechanism. DETAILED DESCRIPTION

[0032] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments and the accompanying drawings:

[0033] Please refer to Figure 1-4 , a building construction site drainage system, including

[0034] A water collecting trough 2 is pre-buried below the ground of the foundation pit 1, and a plurality of corresponding water-permeable holes 201 are provided on the side wall of the water collecting trough 2;

[0035] The main drainage mechanism 3 includes a first vertical water storage cylinder 301 fixedly mounted in the water collection tank 2. The top of the first vertical water storage cylinder 301 is horizontally folded outward to form a corresponding first water inlet ring plate 302. The outer edge of the first water inlet ring plate 302 is upwardly connected to a first water retaining plate 303 having a diameter larger than that of the first vertical water storage cylinder 301. The first water inlet ring plate 302 is evenly distributed with a plurality of corresponding first water filter holes. The bottom of the first vertical water storage cylinder 301 is sealedly connected to the bottom surface of the water collection tank 2. A corresponding first liquid level sensor 4 is fixedly mounted on the upper side of the bottom of the first vertical water storage cylinder 301. The bottom of the first vertical water storage cylinder 301 is upwardly connected to a corresponding first drainage pipe 304, which is connected to a corresponding main liquid pump 305.

[0036] The backup drainage mechanism 5 includes a second vertical water storage cylinder 501 fixed in the water collection tank 2. The top of the second vertical water storage cylinder 501 is horizontally folded outward to provide a second water inlet ring plate 502 positioned higher than the first water inlet ring plate 302. The outer edge of the second water inlet ring plate 502 is upwardly connected to a second water retaining plate 503 having a diameter larger than that of the second vertical water storage cylinder 501, and the second water inlet ring plate 502 is evenly distributed with a plurality of corresponding second water filter holes; the bottom of the second vertical water storage cylinder 501 is sealed and connected to the bottom surface of the water collection tank 2, and a corresponding second liquid level sensor 6 is fixed on the upper side of the bottom of the second vertical water storage cylinder 501. The bottom of the second vertical water storage cylinder 501 is upwardly connected to a corresponding second drainage pipe 504, and the second drainage pipe 504 is connected to a corresponding backup liquid pump 505;

[0037] The silt screw conveyor 7 is used to pump out the silt at the bottom of the water collecting tank 2. The feed end of the silt screw conveyor 7 is set at the bottom of the water collecting tank 2, and the discharge end of the silt screw conveyor 7 is set at the top outside of the water collecting tank 2.

[0038] Control system 8, the first liquid level sensor 4 and the second liquid level sensor 6 are respectively connected to the control system 8, and the working process of the main liquid pump 305, the backup liquid pump 505, and the sludge screw conveyor 7 is controlled by the control system 8. The control system 8 in this embodiment is a PLC programmable encoder.

[0039] When the first liquid level sensor 4 senses that the height of the water entering the first vertical water storage cylinder 301 along the first water filter hole reaches the position of the first liquid level sensor 4, the main liquid pump 305 starts to drain water; when the water level in the first vertical water storage cylinder 301 is lower than the position of the first liquid level sensor 4, the main liquid pump 305 stops.

[0040] The first vertical water storage cylinder 301 of the main drainage mechanism 3 of the present invention is fixed with a first liquid level sensor 4 on the upper side of the bottom. When the first liquid level sensor 4 senses that the height of the water entering the first vertical water storage cylinder 301 along the first water filter hole reaches the position of the first liquid level sensor 4, the main liquid pump 305 starts to drain water; when the water level in the first vertical water storage cylinder 301 is lower than the position of the first liquid level sensor 4, the main liquid pump stops, thereby effectively achieving water level lowering treatment at the construction site under the premise of unattended operation.

[0041] When the second liquid level sensor 6 senses that the height of the water entering the second vertical water storage cylinder 501 along the second water filter hole reaches the position of the second liquid level sensor 6, the standby liquid pump 505 starts to drain water; when the water height in the second vertical water storage cylinder 501 is lower than the position of the second liquid level sensor 6, the standby liquid pump 505 stops operating.

[0042] In addition to the main drainage mechanism 3, the present invention further incorporates a backup drainage mechanism 5. The second water inlet ring plate 502, located at the top of the second vertical water storage cylinder 501 of the backup drainage mechanism 5, is higher than the first water inlet ring plate 301 of the main drainage mechanism 3. In other words, only when the amount of water entering the sump 2 exceeds the displacement capacity of the main pump 305 and the water level rises further to the height of the second water inlet ring plate 502 can it enter the second vertical water storage cylinder 501 through the second water filter hole. Therefore, when the second liquid level sensor 6 detects that the water entering the second vertical water storage cylinder 501 has reached its location, it determines that the amount of water entering the sump 2 exceeds the displacement capacity of the main pump 305. At this point, the backup pump 505 is activated to begin drainage, effectively ensuring the convenience and adaptability of water level reduction processing in an unmanned environment.

[0043] The time required for the standby liquid pump 505 to pump out the water with a volume equal to that of the second vertical water storage cylinder 501 and the second water retaining wall 503 is set to t; when the water level in the first vertical water storage cylinder 301 is lower than the position of the first liquid level sensor 4, and the standby liquid pump 505 has been running continuously for a period of t, and the water level in the second vertical water storage cylinder 501 is still higher than the position of the second liquid level sensor 6, the sludge screw conveyor 7 starts to pump out the sludge.

[0044] On the basis of the main drainage mechanism 3 and the backup drainage mechanism 5, the present invention is further provided with a sludge screw conveyor 7, which realizes automatic pumping and drainage of the sludge at the bottom of the sump 2 while the water level is lowered. The present invention first sets the time t for the standby liquid pump 505 to completely pump out the water with a volume equal to that of the second vertical water storage cylinder 501 and the second water retaining wall 503; when the water level in the first vertical water storage cylinder 301 is lower than the location of the first liquid level sensor 4, and the standby liquid pump 505 has been running continuously for a time t, while the water level in the second vertical water storage cylinder 501 is still higher than the location of the second liquid level sensor 6, it can be determined that: the first water filter hole on the first water inlet ring plate 302 is blocked by the deposited silt, resulting in the inability of water to flow normally into the first vertical water storage cylinder 301; at the same time, water still continues to enter the water collection tank 2, so the water located above the silt can continue to enter the second vertical water storage cylinder 501. Therefore, the water level in the second vertical water storage cylinder 501 may still be higher than the location of the second liquid level sensor 6 after the standby liquid pump 505 has been running continuously for a time t. At this time, the sludge screw conveyor 7 can be started to pump out the sludge whose sedimentation height reaches the set value, thereby further realizing the automatic cleaning of the sludge without human supervision.

[0045] The outer wall fixing device of the first vertical water storage cylinder 301 has a corresponding abutting ridge 9, and a corresponding suspension sealing plate 10 is movably sleeved on the first vertical water storage cylinder 301 above the abutting ridge 9. The top surface of the suspension sealing plate 10 is set to be flat and compatible with the first water inlet ring plate 302, and the bottom surface of the suspension sealing plate 10 is set to be conical. The suspension sealing plate 10 is made of a density of 1.14g / cm 3 Made of PA66 nylon.

[0046] When the accumulated silt blocks the first water filter hole, a situation may arise where the pumping capacity of the backup liquid extraction pump 505 is less than the amount of water entering the sump 2. In this case, the water level in the sump 2 will further rise, leading to increased pressure. In severe cases, more silt will be squeezed into the first vertical water storage cylinder 301, causing subsequent drainage problems for the main liquid extraction pump 305. To this end, the present invention further provides a corresponding abutting ridge 9 on the outer wall fixing device of the first vertical water storage cylinder 301, and a corresponding floating sealing plate 10 is movably connected to the first vertical water storage cylinder 301 above the abutting ridge 9.

[0047] Since the density of the suspended sealing plate 10 is greater than that of the water, it will initially be fixed against the abutting ridge 9. As the silt settles, it will gradually lift the suspended sealing plate 10. This is because the density of the silt after water, that is, the wet density of the silt, can reach 1.4 g / cm 3Therefore, the deposited silt will gradually lift the suspended sealing plate 10, so that its top surface will eventually be blocked on the lower side of the first water inlet ring plate 302, thereby compensating for the blockage of the first water filter hole of the first water inlet ring plate 302 by the silt, so as to prevent the silt from excessively entering the first vertical water storage cylinder 301, thereby realizing the automatic cleaning of the silt of the present invention, thereby ensuring the practical effect of the present invention.

[0048] The water collecting trough 2; the first vertical water storage cylinder 301, the first water inlet ring plate 302 and the first water retaining plate 303; and the second vertical water storage cylinder 501, the second water inlet ring plate 502 and the second water retaining plate 503 are all made of integrated engineering plastics.

[0049] The bottom surface of the water collection tank 2 is provided with corresponding plug-in tubes 11 at positions corresponding to the first vertical water storage cylinder 301 and the second vertical water storage cylinder 501, and the bottoms of the first vertical water storage cylinder 301 and the second vertical water storage cylinder 501 are sealed and plugged into the plug-in tubes 11 by gluing.

[0050] A pre-filtering gravel layer 12 is filled between the water collecting tank 2 and the foundation pit 1. The bottoms of the first drainage pipe 304 and the second drainage pipe 504 are respectively provided with corresponding filter covers 13.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A drainage system for a building construction site, characterized by: include A water collecting trough (2) pre-buried below the ground of the foundation pit (1), wherein a plurality of corresponding water permeable holes (201) are provided on the side wall of the water collecting trough (2); A main drainage mechanism (3) comprises a first vertical water storage cylinder (301) fixedly mounted in the water collecting tank (2); the top of the first vertical water storage cylinder (301) is horizontally folded outwardly to provide a corresponding first water inlet ring plate (302); the outer edge of the first water inlet ring plate (302) is upwardly connected to a first water retaining plate (303) having a diameter larger than that of the first vertical water storage cylinder (301); and the first water inlet ring plate (302) is evenly distributed with a plurality of corresponding first water filter holes; the bottom of the first vertical water storage cylinder (301) is sealedly connected to the bottom surface of the water collecting tank (2), and a corresponding first liquid level sensor (4) is fixedly mounted on the upper side of the bottom of the first vertical water storage cylinder (301); the bottom of the first vertical water storage cylinder (301) is upwardly connected to a corresponding first drainage pipe (304), and the first drainage pipe (304) is connected to a corresponding main liquid pump (305); A backup drainage mechanism (5) comprises a second vertical water storage cylinder (501) fixedly mounted in the water collecting tank (2); the top of the second vertical water storage cylinder (501) is horizontally folded outwardly to provide a second water inlet ring plate (502) positioned higher than the first water inlet ring plate (302); the outer edge of the second water inlet ring plate (502) is upwardly connected to a second water retaining plate (503) having a diameter larger than that of the second vertical water storage cylinder (501); and a plurality of corresponding second water filter holes are evenly distributed on the second water inlet ring plate (502); the bottom of the second vertical water storage cylinder (501) is sealedly connected to the bottom surface of the water collecting tank (2), and a corresponding second liquid level sensor (6) is fixedly mounted on the upper side of the bottom of the second vertical water storage cylinder (501); the bottom of the second vertical water storage cylinder (501) is upwardly connected to a corresponding second drainage pipe (504), and the second drainage pipe (504) is connected to a corresponding backup liquid pump (505); The silt screw conveyor (7) is used to pump out the silt at the bottom of the water collecting tank (2). The feed end of the silt screw conveyor (7) is arranged at the bottom of the water collecting tank (2), and the discharge end of the silt screw conveyor (7) is arranged on the outside of the top of the water collecting tank (2). A control system (8), wherein the first liquid level sensor (4) and the second liquid level sensor (6) are respectively connected to the control system (8), and the working processes of the main liquid pumping pump (305), the standby liquid pumping pump (505), and the sludge screw conveyor (7) are controlled by the control system (8).

2. A building construction site drainage system according to claim 1, characterized in that: When the first liquid level sensor (4) senses that the height of the water entering the first vertical water storage cylinder (301) along the first water filter hole reaches the position of the first liquid level sensor (4), the main liquid pump (305) starts to drain water; when the height of the water in the first vertical water storage cylinder (301) is lower than the position of the first liquid level sensor (4), the main liquid pump (305) stops operating.

3. A building construction site drainage system according to claim 2, characterized in that: When the second liquid level sensor (6) senses that the height of the water entering the second vertical water storage cylinder (501) along the second water filter hole reaches the position of the second liquid level sensor (6), the standby liquid pump (505) starts to drain water; when the height of the water in the second vertical water storage cylinder (501) is lower than the position of the second liquid level sensor (6), the standby liquid pump (505) stops operating.

4. A building construction site drainage system according to claim 3, characterized in that: The time required for the standby liquid pump (505) to pump out the water having a volume equal to that of the second vertical water storage cylinder (501) and the second water retaining wall (503) is set to t; when the water level in the first vertical water storage cylinder (301) is lower than the location of the first liquid level sensor (4), and the standby liquid pump (505) has been running continuously for a time period t, and the water level in the second vertical water storage cylinder (501) is still higher than the location of the second liquid level sensor (6), the sludge screw conveyor (7) is started to pump out the sludge.

5. A building construction site drainage system according to claim 4, characterized in that: The outer wall fixing device of the first vertical water storage cylinder (301) has a corresponding abutting ridge (9), and a corresponding suspended sealing plate (10) is movably sleeved on the first vertical water storage cylinder (301) above the abutting ridge (9). The top surface of the suspended sealing plate (10) is set to a plane shape that is compatible with the first water inlet ring plate (302), and the bottom surface of the suspended sealing plate (10) is set to a conical surface shape.

6. A building construction site drainage system according to claim 5, characterized in that: The suspension sealing plate (10) is made of a material having a density of 1.14 g / cm 3 Made of PA66 nylon.

7. The building construction site drainage system according to claim 1, characterized in that: The water collecting trough (2); the first vertical water storage cylinder (301), the first water inlet ring plate (302) and the first water retaining plate (303); and the second vertical water storage cylinder (501), the second water inlet ring plate (502) and the second water retaining plate (503) are all formed by integral molding of engineering plastics.

8. A building construction site drainage system according to claim 7, characterized in that: The bottom surface of the water collecting tank (2) is provided with corresponding plug-in cylinders (11) at positions corresponding to the first vertical water storage cylinder (301) and the second vertical water storage cylinder (501), and the bottoms of the first vertical water storage cylinder (301) and the second vertical water storage cylinder (501) are sealed and plugged into the plug-in cylinders (11) by gluing.

9. The building construction site drainage system according to claim 1, characterized in that: A pre-filtration gravel layer (12) is filled between the water collecting trough (2) and the foundation pit (1).

10. The building construction site drainage system according to claim 1, characterized in that: The bottoms of the first drainage pipe (304) and the second drainage pipe (504) are respectively provided with corresponding filter covers (13).

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