Drainage system for building anti-floating

Abstract

The application discloses a water drainage system for building anti-floating, and relates to the technical field of underground water anti-floating construction. The water drainage system comprises a plurality of original dewatering pipe wells arranged in a foundation pit, and a water collecting well arranged on a ground structure layer of a basement. The top of each dewatering pipe well is communicated with an extension pipeline, the height of the pipe opening of the extension pipeline is lower than the top surface of the ground structure layer, a overflow pipe sleeve is arranged on the extension pipeline, the height of the pipe opening of the overflow pipe sleeve is higher than the height of the pipe opening of the extension pipeline, and the overflow pipe sleeve is higher than the top surface of the ground structure layer. A cement stabilized sand mortar layer is arranged in the overflow sleeve, and the top of the extension pipeline is higher than the top of the cement stabilized sand mortar layer. The overflow pipe sleeve is communicated with a connecting water pipe, the connecting water pipe is communicated with the water collecting well, and a water pump for pumping water in the water collecting well is arranged on the water collecting well. The application has the effect of saving the labor management cost of daily inspection and maintenance of the basement anti-floating dewatering.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of anti-floating construction of underground water, and in particular to a water drainage system for building anti-floating. BACKGROUND

[0002] A basement refers to a room whose ground surface is lower than the outdoor ground surface by more than one-half of the net height of the room, and therefore, the basement is usually built below the ground surface. When it rains and the underground water level rises, the basement bottom is affected by the upward floating force of the underground water. When the floating force of the underground water exceeds the limit value borne by the basement bottom plate, the basement bottom plate will be raised and cracked, and therefore, the anti-floating water drainage hole is usually arranged in the basement structure to solve the problem of excessive underground water floating force.

[0003] At present, the arrangement of the basement anti-floating water drainage hole mainly includes two types. One is to pre-bury a steel sleeve pipe as the anti-floating water drainage hole during the construction of the basement structure, and the other is to retain the original dewatering pipe well in the foundation pit during the construction of the ground structure of the basement, and utilize the well hole of the dewatering pipe well as the anti-floating water drainage hole during the construction of the basement structure and the ground structure layer, and generally, one water drainage hole is reserved every 1000-500 square meters.

[0004] However, in the traditional form of retaining the dewatering pipe well as the basement anti-floating water drainage hole, the personnel need to patrol and timely pump out the accumulated water at each water drainage hole site, which causes the increase of the labor cost and management cost during the construction process. SUMMARY

[0005] In order to save the labor management cost of the daily patrol and inspection of the basement anti-floating water drainage, the application provides a water drainage system for building anti-floating.

[0006] The water drainage system for building anti-floating provided by the application adopts the following technical scheme:

[0007] The water drainage system for building anti-floating comprises a plurality of original dewatering pipe wells arranged in the foundation pit, and further comprises a collecting well arranged in the ground structure layer of the basement. The top of each dewatering pipe well is communicated with an extension pipe. The pipe opening height of the extension pipe is lower than the top surface of the ground structure layer. An overflow pipe sleeve is sleeved on the extension pipe. The pipe opening height of the overflow pipe sleeve is higher than the pipe opening height of the extension pipe and is higher than the top surface of the ground structure layer. A cement stabilized sand mortar layer is arranged in the overflow pipe sleeve. The top of the extension pipe is higher than the top of the cement stabilized sand mortar layer. The overflow pipe sleeve is communicated with a connecting water pipe. The connecting water pipe is communicated with the collecting well. A water pump for pumping out the accumulated water in the collecting well is arranged on the collecting well.

[0008] Optionally, the connecting water pipe is downwardly inclined from the overflow pipe sleeve to the collecting well.

[0009] Optionally, the lengthening pipe is arranged to be inserted into the precipitation pipe well, a plurality of mounting holes are arranged on the side wall of the lengthening pipe, the mounting holes are distributed along the circumference of the lengthening pipe, a top block is slidably arranged in each mounting hole, the top block is arranged to abut against the inner wall of the precipitation pipe well, and a limiting assembly is arranged in the lengthening pipe to prevent the top blocks from sliding.

[0010] Optionally, the limiting assembly comprises a fixing sleeve, a sliding rod, a connecting rod and a limiting piece, a fixing frame is fixedly arranged in the lengthening pipe, the fixing sleeve is fixedly arranged on the fixing frame, the sliding rod is slidably arranged in the fixing sleeve, a plurality of connecting holes are arranged on the side wall of the fixing sleeve along the length direction of the fixing sleeve, one connecting rod is arranged in each connecting hole, the connecting rods correspond to the top blocks one by one, one end of the connecting rod is hingedly connected with the sliding rod, the other end of the connecting rod is hingedly connected with the corresponding top block, and the limiting piece is arranged to prevent the sliding rod from sliding.

[0011] Optionally, the limiting piece comprises a limiting screw, the limiting screw is rotatably arranged on the fixing frame, the axial direction of the limiting screw is parallel to the axial direction of the fixing sleeve, the limiting screw is arranged to pass through the fixing sleeve and threadedly cooperate with the sliding rod.

[0012] Optionally, a fixed plate is fixedly arranged on the side wall of the lengthening pipe, a sealing washer is arranged on the lengthening pipe and located at the bottom of the fixed plate, and an air bag cavity is arranged on the inside of the sealing washer along the circumference of the sealing washer.

[0013] Optionally, an installation slot is arranged on the end of the top block away from the connecting rod, the installation slot penetrates through the upper side wall of the top block, the lower side wall of the installation slot is inclined downward along the direction close to the connecting rod, a pry plate is hingedly arranged in the installation slot, a prying tooth is arranged on the pry plate, the prying tooth is arranged to abut against the inner wall of the precipitation pipe well, and an elastic piece is arranged on the top block to drive the pry plate to deflect away from the bottom wall of the installation slot.

[0014] Optionally, a positioning sleeve is arranged on the lengthening pipe and located at the bottom of the fixed plate, the positioning sleeve is matched with the precipitation pipe well, and the sealing washer is arranged on the positioning sleeve.

[0015] Optionally, a roller is rotatably arranged on the upper hole wall of each mounting hole, and the roller is rollingly connected with the pry plate.

[0016] Optionally, a floating ball gate valve is fixedly arranged in the water collecting well, and the floating ball gate valve is connected with the water pump.

[0017] In summary, the present application has at least one of the following beneficial technical effects:

[0018] 1. Before the construction of the aboveground structure layer of the basement, connect the lengthening pipe to each of the original dewatering tube wells in the foundation pit, thereby increasing the height of the original dewatering tube wells, and set the overflow sleeve on each lengthening pipe, so that the height of the opening of the overflow sleeve is higher than that of the lengthening pipe, and connect the connecting water pipe to each overflow sleeve. When the aboveground structure layer of the basement is being constructed, set the water collecting well on the aboveground structure layer, so that each connecting water pipe is connected to the water collecting well. After the construction of the aboveground structure layer of the basement is completed, pour the cement stabilized sand mortar into the overflow sleeve to form a cement stabilized sand mortar layer, and the top of the lengthening pipe is higher than the top of the cement stabilized sand mortar layer, so that the dewatering tube well, the lengthening pipe, the overflow sleeve, the connecting water pipe and the water collecting well form a drainage passage. Thus, during the construction of the aboveground structure layer of the basement, the construction and arrangement of the anti-floating drainage hole are completed, and the drainage system is integrated and optimized. After the underground water overflows through the lengthening pipe and the overflow sleeve at each dewatering tube well, it is collected in the water collecting well through the connecting water pipe, and then is pumped out by the water pump, thereby greatly saving the labor cost of the daily inspection of the anti-floating drainage of the basement.

[0019] 2. After the overflowed underground water is collected in the water collecting well, the water level in the water collecting well rises, driving the floating ball of the floating ball gate valve to rise. After the floating ball rises to a certain height, the water pump is controlled to be turned on, so that the accumulated water in the water collecting well is pumped out, thereby realizing the automatic pumping of the accumulated water in the water collecting well, and further reducing the construction and maintenance costs of the anti-floating drainage of the basement. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure of the embodiment of the present application.

[0021] Figure 2 is a structure diagram for expressing the lengthening pipe.

[0022] Figure 3 is Figure 2 is an enlarged view of part A in

[0023] DESCRIPTION OF THE DRAWINGS: 1, dewatering tube well; 2, water collecting well; 21, water pump; 22, drainage pipe; 23, floating ball gate valve; 3, lengthening pipe; 31, mounting hole; 311, roller; 32, top block; 321, mounting groove; 322, pry plate; 3221, pry tooth; 323, elastic member; 33, fixing sleeve; 331, connecting hole; 34, sliding rod; 35, connecting rod; 36, fixing frame; 37, limiting screw; 38, positioning sleeve; 381, sealing washer; 39, fixing plate; 4, overflow sleeve; 41, connecting water pipe; 42, cement stabilized sand mortar layer. DETAILED DESCRIPTION

[0024] The following will be described in detail in combination with the accompanying Figures 1-3 The present application will be described in further detail.

[0025] The embodiment of the present application discloses a water drainage system for building anti-floating. Figure 1 , comprising several original dewatering pipe wells 1 arranged in the foundation pit and a water collecting well 2 arranged on the ground structure layer of the basement, the top of each dewatering pipe well 1 is communicated with an extension pipe 3, the extension pipe 3 is made of steel fire-fighting pipe, the overflow sleeve 4 is sleeved on the extension pipe 3, the top wall of the overflow sleeve 4 is provided with an opening, and the overflow sleeve 4 is communicated with a connecting water pipe 41 which is communicated with the water collecting well 2.

[0026] Referring to Figure 1 , before the construction of the ground structure layer of the basement, the extension pipe 3 is communicated with each original dewatering pipe well 1, the original dewatering pipe well 1 is heightened, the pipe opening position of the extension pipe 3 is 200mm-300mm higher than the top wall of the dewatering pipe well 1, the soil layer around the dewatering pipe well 1 is removed, the overflow sleeve 4 is sleeved on the extension pipe 3, the pipe opening height of the overflow sleeve 4 is higher than that of the extension pipe 3, holes are drilled on the side wall of each overflow sleeve 4, and the connecting water pipe 41 is communicated with the holes through waterproof glue.

[0027] Referring to Figure 1 , when the ground structure layer of the basement is constructed and poured, the pipe opening position of the extension pipe 3 is lower than the top surface of the ground structure layer, the pipe opening position of the overflow sleeve is higher than the top surface of the ground structure layer, the connecting water pipe 41 is buried in the ground structure layer, the water collecting well 2 is arranged on the ground structure layer during the pouring process of the ground structure layer, each connecting water pipe 41 is communicated with the water collecting well 2, after the ground structure construction of the basement is completed, the cement stabilized sand mortar is poured into the overflow sleeve 4, the cement stabilized sand mortar covers the joint between the overflow sleeve 4 and the dewatering pipe well 1 and the joint between the extension pipe 3 and the dewatering pipe well 1, the cement stabilized sand is vibrated and compacted, the cement stabilized sand mortar layer 42 is formed, the top of the extension pipe 3 is higher than the top of the cement stabilized sand mortar layer 42, and the dewatering pipe well 1, the extension pipe 3, the overflow sleeve 4, the connecting water pipe 41 and the water collecting well 2 form a drainage passage, so that the construction and deployment of the anti-floating dewatering hole are completed during the structure construction stage of the ground structure layer of the basement, and the water drainage system is integrated and optimized.

[0028] Referring to Figure 1 , the connecting water pipe 41 is downwardly inclined from the overflow sleeve 4 to the water collecting well 2; after the underground water overflows through the extension pipe 3 and the overflow sleeve 4 at each dewatering pipe well 1, the underground water is introduced into the water collecting well 2 through the connecting water pipe 41, and the connecting water pipe 41 is downwardly inclined from the overflow sleeve 4 to the water collecting well 2, so that the overflowed underground water is conveniently collected into the water collecting well 2.

[0029] Referring to Figure 1Also include the setting on the ground structure layer on the water pump 21, the water pump 21 inlet end is communicated with the drain pipe 22, the bottom of the water collecting well 2 is fixedly provided with a float ball gate valve 23, the drain pipe 22 is communicated with the float ball gate valve 23;The overflow groundwater is collected after the water collecting well 2, the water level in the water collecting well 2 rises, drives the float ball of the float ball gate valve 23 to rise, the float ball rises a certain height, controls the water pump 21 to open, and the accumulated water in the water collecting well 2 is uniformly pumped out, and the automatic pumping of the accumulated water in the water collecting well 2 is realized, thereby greatly saving the artificial management cost of the daily inspection of the basement anti-floating and drainage, and the construction management cost and maintenance cost of the basement anti-floating and drainage.

[0030] With reference to Figure 2 The side wall of the lengthening pipe 3 is provided with a plurality of mounting holes 31, in the embodiment of the application, the mounting holes 31 are three, the mounting holes 31 are distributed equidistantly along the circumference of the lengthening pipe 3, and each mounting hole 31 is slidably provided with a top block 32 along the vertical direction of the central axis of the lengthening pipe 3. The lengthening pipe 3 is provided with a limiting assembly for preventing the sliding of the top blocks 32, and the limiting assembly comprises a fixed sleeve 33, a sliding rod 34, a connecting rod 35 and a limiting piece. The lengthening pipe 3 is fixedly provided with a fixed frame 36, and the fixed sleeve 33 is fixedly arranged on the fixed frame 36, and the center line of the fixed sleeve 33 coincides with the center line of the lengthening pipe 3.

[0031] With reference to Figure 2 The sliding rod 34 is matched with the inside of the fixed sleeve 33, and the sliding rod 34 is slidably arranged in the fixed sleeve 33 along the length direction of the fixed sleeve 33. The side wall of the sliding rod 34 is fixedly provided with a limiting block, and the inner side wall of the fixed sleeve 33 is provided with a limiting groove along the axial direction of the fixed sleeve 33. The limiting block is slidably arranged in the limiting groove. The side wall of the fixed sleeve 33 is provided with a plurality of connecting holes 331 along the length direction of the fixed sleeve 33. The number of the connecting holes 331 is equal to the number of the top blocks 32, and the connecting holes 331 correspond to the top blocks 32 one by one. Each connecting hole 331 is provided with a connecting rod 35, and the connecting rod 35 corresponds to the top block 32 one by one. One end of the connecting rod 35 is hingedly connected with the sliding rod 34, and the other end of the connecting rod 35 is hingedly connected with the corresponding top block 32.

[0032] With reference to Figure 2The limiting member comprises a limiting screw rod 37 which is rotationally arranged on the fixing frame 36 and whose axial direction is parallel to the axial direction of the fixing sleeve 33. The limiting screw rod 37 is arranged in the fixing sleeve 33 and is threadedly connected with the sliding rod 34. When the extension pipeline 3 is installed, the bottom of the extension pipeline 3 is inserted into the dewatering pipe well 1. Then, the sliding rod 34 is driven to slide in the fixing sleeve 33 by rotating the limiting screw rod 37. Then, each top block 32 is driven to move away from each other by each connecting rod 35, and is abutted against the inner wall of the dewatering pipe well 1, so that the extension pipeline 3 is fixed on the dewatering pipe well 1. The extension pipeline 3 is more convenient to fix on the dewatering pipe well 1.

[0033] With reference to Figure 2 A positioning sleeve 38 is arranged on the extension pipeline 3 and is fixed. The positioning sleeve 38 is matched with the dewatering pipe well 1. When the extension pipeline 3 is installed, the positioning sleeve 38 is inserted into the dewatering pipe well 1. The extension pipeline 3 is positioned by the positioning sleeve 38, so that the extension pipeline 3 is coincided with the central axis of the dewatering pipe well 1.

[0034] With reference to Figure 2 A fixing plate 39 is fixedly arranged on the side wall of the extension pipeline 3 and is located at the top of the positioning sleeve 38 along the circumferential direction of the extension pipeline 3. A sealing gasket 381 is arranged on the positioning sleeve 38 and is located below the fixing plate 39. The sealing gasket 381 is made of rubber. An air bag cavity is arranged in the sealing gasket 381 along the circumferential direction of the sealing gasket 381. When the extension pipeline 3 is installed, the top of the dewatering pipe well 1 is pressed by the fixing plate 39, and the sealing gasket 381 is extruded. The gap between the positioning sleeve 38 and the dewatering pipe well 1 is sealed. Then, the gap between the extension pipeline 3 and the dewatering pipe well 1 is sealed. The water seepage during use is avoided.

[0035] With reference to Figure 3 An installation groove 321 is arranged at the end of the top block 32 which is away from the connecting rod 35. The installation groove 321 penetrates the upper side wall of the top block 32. The lower side wall of the installation groove 321 is inclined downward along the direction close to the connecting rod 35. A hinge shaft is rotationally arranged in the installation groove 321. A pry plate 322 is fixedly arranged on the hinge shaft. A plurality of prying teeth 3221 are fixedly arranged on the pry plate 322. An elastic member 323 is arranged on the top block 32 and is used to drive the pry plate 322 to deflect to the direction away from the bottom wall of the installation groove 321. The elastic member 323 comprises a torsion spring. The torsion spring is arranged on the hinge shaft. One end of the torsion spring is fixedly connected with the pry plate 322. The other end of the torsion spring is fixedly connected with the side wall of the installation groove 321. When the pry plate 322 is rotated to the minimum included angle in the direction close to the top block 32, the pry plate 322 is attached to the lower side wall of the installation groove 321.

[0036] When the top block 32 slides away from the fixed sleeve 33, the prying teeth 3221 on the pry plate 322 first abut against the inner wall of the dewatering pipe well 1, and the pry plate 322 is prevented from sliding relative to the inner wall of the dewatering pipe well 1 through the prying teeth 3221. Then, with the sliding of the top block 32, the pry plate 322 is deflected away from the top block 32 under the driving of the pushing force of the connecting rod 35 and the elastic force of the torsional spring. Because of the influence of the hole wall of the mounting hole 31, the maximum deflection angle of the pry plate 322 is controlled. With the sliding of the top block 32, the distance between the hinge shaft and the outer side wall of the extension pipeline 3 gradually decreases, and the deflectable angle of the pry plate 322 gradually increases. During the deflection of the pry plate 322, because the pry plate 322 does not slide relative to the side wall of the dewatering pipe well 1, the top block 32 and the entire extension pipeline 3 can be driven to move downward by a certain distance. In this process, the fixed plate 39 moves by a certain distance towards the dewatering pipe well 1, so that the fixed plate 39 extrudes the sealing gasket 381, and then seals the gap between the extension pipeline 3 and the dewatering pipe, so that the staff does not need to manually press the extension pipeline 3 to make the fixed plate 39 extrude the sealing gasket 381 and seal the gap between the extension pipeline 3 and the dewatering pipe well 1, and the extension pipeline 3 is more convenient to install.

[0037] With reference to Figure 3 A roller shaft 311 is rotatably arranged on the upper hole wall of each mounting hole 31, and the roller shaft 311 is in rolling connection with the pry plate 322. The roller shaft 311 reduces the friction between the pry plate 322 and the extension pipeline 3, so that the top block 32 slides or the pry plate 322 deflects more smoothly.

[0038] The implementation principle of the dewatering and drainage system for building anti-floating in the embodiment of the application is as follows: before the construction of the ground structure layer of the basement, the extension pipeline 3 is communicated on each original dewatering pipe well 1 in the foundation pit, the original dewatering pipe well 1 is heightened, the pipe opening position of the extension pipeline 3 is 200-300 mm higher than the top wall of the dewatering pipe well 1, the overflow sleeve 4 is sleeved on each extension pipeline 3, the pipe opening height of the overflow sleeve 4 is higher than the pipe opening height of the extension pipeline 3, and the connecting water pipe 41 is communicated through waterproof glue at the hole position by drilling holes in the side wall of each overflow sleeve 4.

[0039] During the construction and pouring of the ground structure layer of the basement, the pipe opening position of the lengthening pipe 3 is lower than the top surface of the ground structure layer, the pipe opening position of the overflow pipe sleeve is higher than the top surface of the ground structure layer, the connecting water pipes 41 are buried in the ground structure layer, and during the pouring of the ground structure layer, the water collecting well 2 is arranged on the ground structure layer, so that each connecting water pipe 41 is in communication with the water collecting well 2, after the ground structure construction of the basement is completed, the cement stabilized sand mortar is poured into the overflow sleeve 4, so that the cement stabilized sand mortar covers the joint between the overflow sleeve 4 and the dewatering well 1 and the joint between the lengthening pipe 3 and the dewatering well 1, the cement stabilized sand mortar is vibrated and compacted, the cement stabilized sand mortar layer 42 is formed, the top of the lengthening pipe 3 is higher than the top of the cement stabilized sand mortar layer 42, and the dewatering well 1, the lengthening pipe 3, the overflow sleeve 4, the connecting water pipe 41 and the water collecting well 2 form a drainage passage, so that during the construction of the ground structure layer of the basement, the construction and arrangement of the anti-floating drainage hole are completed, and the drainage system is integrated and optimized.

[0040] After the groundwater overflows through the lengthening pipe 3 and the overflow sleeve 4 at each dewatering well 1, the groundwater is introduced into the water collecting well 2 through the connecting water pipe 41, after the overflowed groundwater is collected in the water collecting well 2, the water level in the water collecting well 2 rises, the float ball of the float ball valve 23 rises, after the float ball rises to a certain height, the water pump 21 is controlled to be started, and the accumulated water in the water collecting well 2 is uniformly pumped and drained, and the automatic pumping and draining of the accumulated water in the water collecting well 2 is realized, so that the labor management cost of the daily inspection of the anti-floating drainage of the basement and the construction management cost and maintenance cost of the anti-floating drainage of the basement are greatly saved.

[0041] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water drainage system for building anti-floating, comprising a plurality of original dewatering tube wells (1) arranged in a foundation pit, characterized in that: Further comprising a water collecting well (2) arranged on the ground structure layer of the basement, a lengthening pipe (3) is communicated with the top of each of the dewatering pipe wells (1), the height of the pipe opening of the lengthening pipe (3) is lower than the top surface of the ground structure layer, a overflow pipe sleeve is sleeved on the lengthening pipe (3), the height of the pipe opening of the overflow pipe sleeve is higher than the height of the pipe opening of the lengthening pipe (3) and is higher than the top surface of the ground structure layer, a cement stabilized sand mortar layer (42) is arranged in the overflow pipe sleeve (4), the top of the lengthening pipe (3) is higher than the top of the cement stabilized sand mortar layer (42), the overflow pipe sleeve is communicated with a connecting water pipe (41), the connecting water pipe (41) is communicated with the water collecting well (2), the water collecting well (2) is provided with a water pump (21) for pumping water accumulated in the water collecting well (2) away; The lengthening pipe (3) is used for being inserted into the dewatering pipe well (1), a plurality of mounting holes (31) are formed in the side wall of the lengthening pipe (3), the mounting holes (31) are distributed along the circumference of the lengthening pipe (3), a top block (32) is slidably arranged in each of the mounting holes (31), the top block (32) is used for abutting against the inner wall of the dewatering pipe well (1), a limiting assembly for preventing the top blocks (32) from sliding is arranged in the lengthening pipe (3); The limiting assembly comprises a fixing sleeve (33), a sliding rod (34), a connecting rod (35) and a limiting piece, a fixing frame (36) is fixedly arranged in the lengthening pipe (3), the fixing sleeve (33) is fixedly arranged on the fixing frame (36), the sliding rod (34) is slidably arranged in the fixing sleeve (33), a plurality of connecting holes (331) are formed in the side wall of the fixing sleeve (33) along the length direction of the fixing sleeve (33), one connecting rod (35) is arranged in each of the connecting holes (331), the connecting rods (35) correspond to the top blocks (32) one by one, one end of the connecting rod (35) is hingedly connected with the sliding rod (34), the other end of the connecting rod (35) is hingedly connected with the corresponding top block (32), and the limiting piece is used for preventing the sliding rod (34) from sliding; A fixing plate (39) is fixedly arranged on the side wall of the lengthening pipe (3), a sealing washer (381) is sleeved on the lengthening pipe (3) and located at the bottom of the fixing plate (39), an air bag cavity is arranged in the inside of the sealing washer (381) along the circumference of the sealing washer (381); An installation groove (321) is formed in the end of the top block (32) away from the connecting rod (35), the installation groove (321) penetrates through the upper side wall of the top block (32), the lower side wall of the installation groove (321) is inclined downward along the direction close to the connecting rod (35), a pry plate (322) is hingedly connected in the installation groove (321), a prying tooth (3221) is arranged on the pry plate (322), the prying tooth (3221) is used for abutting against the inner wall of the dewatering pipe well (1), and an elastic piece (323) is arranged on the top block (32) and used for driving the pry plate (322) to deflect away from the bottom wall of the installation groove (321).

2. A water drainage system for anti-floating of a building according to claim 1, characterized in that: The connecting water pipe (41) is arranged downwardly to the water collecting well (2) by the overflow pipe sleeve.

3. The water drainage system for anti-floating of a building according to claim 1, characterized in that: The limiting member comprises a limiting screw (37) which is rotationally arranged on the fixing frame (36) and whose axial direction is parallel to that of the fixing sleeve (33), the limiting screw (37) is arranged in the fixing sleeve (33) and threadedly cooperates with the sliding rod (34).

4. The water drainage system for anti-floating of a building according to claim 1, characterized in that: A positioning sleeve (38) is sleeved and fixed on the bottom of the fixed plate (39) on the lengthened pipe (3) and is matched with the dewatering pipe well (1), and a sealing washer (381) is sleeved on the positioning sleeve (38).

5. The water drainage system for anti-floating of a building according to claim 1, wherein: A roller (311) is rotationally arranged on the upper hole wall of each mounting hole (31) and is in rolling connection with the prying plate (322).

6. A water drainage system for anti-floating of a building according to claim 1, wherein: A floating ball gate valve (23) is fixedly arranged in the water collecting well (2) and is connected with the water pumping pump (21).

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