A foundation pit construction method based on rapid drainage

Abstract

The present invention relates to the field of foundation pit engineering, and provides a foundation pit construction method based on rapid drainage, comprising the following steps: a foundation pit and a water recovery pit are opened on the ground, a drainage ditch and a water collection well are opened on the inner wall of the foundation pit, the drainage ditch and the water collection well are communicated, a bracket is fixedly connected to the top wall of the ground, the top wall of the bracket is fixedly connected to the top plate, a water collection tray is liftably connected to the top plate, the water collection tray extends into the water collection well and abuts against the inner wall of the water collection well, a water pump is fixedly connected to the inner wall of the water collection tray, a water suction pipe and a water outlet pipe are fixedly connected to the water pump, the water suction pipe extends into the water collection cavity, the water outlet pipe passes through the top plate and extends to the top of the water recovery pit, a lifting drive assembly is connected in the water collection cavity, and a diversion assembly is connected to the bracket. The present invention has high linkage, fast drainage speed, and improves the safety of the foundation pit.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit engineering, and in particular to a foundation pit construction method based on rapid drainage. Background Art

[0002] Foundation pit drainage is an important measure to ensure the safety of foundation pit construction and the quality of the project. The commonly used method is the open ditch drainage method. The open ditch drainage method digs drainage ditches around or inside the foundation pit to collect water into a collection well, which is then pumped away with a water pump. However, when there is too much groundwater or on rainy days, the water inflow into the collection well is large, and the water pump cannot quickly drain the water from the collection well, causing the water level in the foundation pit to rise, affecting the stability of the foundation pit. Summary of the invention

[0003] In view of the above technical problems, the present invention aims to provide a foundation pit construction method based on rapid drainage. To solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A foundation pit construction method based on rapid drainage comprises the following steps:

[0005] A foundation pit and a recovery pit are opened on the ground, a drainage ditch and a water collection well are opened on the inner wall of the foundation pit, the drainage ditch and the water collection well are connected, a bracket is fixed on the top wall of the ground, the top wall of the bracket is fixed to the top plate, a water collecting pan is liftably connected to the top plate, the water collecting pan extends into the water collecting well and abuts against the inner wall of the water collecting well, a water pump is fixed to the inner wall of the water collecting pan, a suction pipe and a water outlet pipe are fixed to the water pump, the suction pipe extends into the water collecting cavity, the water outlet pipe passes through the top plate and extends to above the recovery pit, a lifting drive assembly is connected to the water collecting cavity, and a diversion assembly is connected to the bracket.

[0006] Furthermore, the lifting drive assembly includes a transmission rope, a drum, a gear 1, a waterproof motor, a transmission shaft, a gear 2 and a fixed plate, one end of the transmission rope is fixedly connected to the bottom wall of the top plate, the inner wall of the water collecting chamber is rotatably connected with the gear 1, the gear 1 is fixedly connected with the drum, the other end of the transmission rope is fixedly connected to the drum, the waterproof motor is fixedly connected to the inner wall of the water collecting chamber, the transmission shaft is fixedly connected to the output shaft of the waterproof motor, the gear 2 is fixedly connected to the transmission shaft, the transmission shaft and the impeller rotatably connected to the water pump are fixedly connected, the fixed plate is fixedly connected to the inner wall of the water collecting chamber, the gear plate and the transmission plate are both slidably connected to the fixed plate, a transmission channel is opened on the gear plate, the gear plate is rotatably connected with the gear 3, the transmission plate is rotatably connected with a transmission roller, the transmission roller is slidably connected to the inner wall of the transmission channel, an extension bar is fixedly connected to the transmission plate, a hollow floating part is fixedly connected to the extension bar, and a permanent magnet 1 is fixedly connected to the hollow floating part;

[0007] The bottom wall of the top plate is fixedly connected with a connecting rod and a connecting seat, the lower end of the connecting rod is fixedly connected with a permanent magnet three, the bottom wall of the connecting seat is fixedly connected with a guide plate, the guide plate is slidably connected with a slide plate, and the top wall of the slide plate is connected to the bottom wall of the connecting seat through an elastic member two.

[0008] Furthermore, the bottom wall of the slide plate is fixedly connected with an extension rod, and the lower end of the extension rod is fixedly connected with a permanent magnet four;

[0009] The guide assembly includes a fixed guide plate and a sliding guide plate. The fixed guide plate is provided with a guide cavity 1, the bottom wall of the guide cavity 1 is in the shape of an inclined surface, the top wall of the fixed guide plate is fixedly connected with a connecting plate, the sliding guide plate is slidably connected to the top wall of the fixed guide plate, the sliding guide plate is provided with a guide cavity 2, the bottom wall of the guide cavity 2 is in the shape of an inclined surface, the top wall of the sliding guide plate is fixedly connected with a permanent magnet 2, and the side wall of the sliding guide plate is connected to the connecting plate through an elastic member 1.

[0010] Furthermore, the guide cavity 1 is communicated with the top wall and the side wall of the fixed guide plate, and the guide cavity 2 is communicated with the top wall and the side wall of the sliding guide plate.

[0011] Furthermore, the water outlet pipe is a soft pipe.

[0012] Furthermore, a motor seat is fixedly connected to the inner wall of the water collecting chamber, and the waterproof motor is fixedly connected to the motor seat.

[0013] Furthermore, the hollow floating member is made of PE plastic.

[0014] Furthermore, the permanent magnet three is obliquely arranged at the lower end of the connecting rod.

[0015] Furthermore, the side wall of the water collection well is inclined, and the water collection tray is in a cone shape.

[0016] Furthermore, a water purification component is provided in the recovery water pit.

[0017] The present invention has the following beneficial effects:

[0018] The present invention can control the water pump to discharge the water in the water collecting chamber to the recovery pit when the water inflow speed in the water collecting chamber is normal. When the water inflow speed in the water collecting chamber exceeds the normal water inflow speed, the water collecting plate moves up to quickly drain most of the water in the water collecting well to prevent the water level from being too high and affecting the stability of the foundation pit. The present invention has high linkage and fast drainage speed, and improves the safety of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described with the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a foundation pit construction method based on rapid drainage of the present invention (with the waterproof motor and motor seat omitted);

[0021] Figure 2 The present invention Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 The present invention Figure 2 Structural diagram of the middle fixed plate;

[0023] Figure 4 The present invention Figure 2 The left side view of the water pump, waterproof motor and motor seat in the middle water collecting cavity;

[0024] Figure 5 The present invention Figure 2 Schematic diagram of the structure of the water pump and gear 2;

[0025] Figure 6 The present invention Figure 1 Enlarged view of point B in the middle.

[0026] Figure numerals: 1, ground; 2, foundation pit; 3, drainage ditch; 4, water collection well; 5, water recovery pit; 6, bracket; 7, top plate; 8, motor seat; 9, water collection tray; 10, water collection chamber; 11, transmission rope; 12, reel; 13, gear one; 14, waterproof motor; 15, transmission shaft; 16, gear two; 17, water pump; 18, water suction pipe; 19, water outlet pipe; 20, fixing plate; 21, gear plate; 22, transmission channel; 23, gear three; 2 4. Transmission plate; 25. Transmission roller; 26. Extension strip; 27. Hollow floating part; 271. Permanent magnet one; 28. Fixed guide plate; 29. ​​Guide cavity one; 30. Sliding guide plate; 31. Guide cavity two; 32. Permanent magnet two; 33. Connecting plate; 34. Elastic part one; 35. Connecting rod; 36. Permanent magnet three; 37. Connecting seat; 38. Guide plate; 39. Elastic part two; 40. Slide plate; 41. Extension rod; 42. Permanent magnet four. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-Figure 6 As shown, a foundation pit construction method based on rapid drainage comprises the following steps:

[0031] A foundation pit 2 and a water recovery pit 5 are opened on the ground 1, a drainage ditch 3 and a water collection well 4 are opened on the inner wall of the foundation pit 2, the foundation pit 2, the drainage ditch 3, the water collection well 4, and the water recovery pit 5 can all be opened by using an excavation device, the drainage ditch 3 and the water collection well 4 are connected, the drainage ditch 3 is arranged around the bottom wall of the foundation pit 2, a bracket 6 is fixed to the top wall of the ground 1, the top wall of the bracket 6 is fixed to the top plate 7, a water collection pan 9 is connected to the top plate 7 in a liftable manner, the water collection pan 9 may be made of aluminum alloy, the water collection pan 9 extends into the water collection well 4 and A water pump 17 is fixedly connected to the inner wall of the water collecting pan 9, which is against the inner wall of the water collecting well 4. A water suction pipe 18 and a water outlet pipe 19 are fixedly connected to the water pump 17. The water suction pipe 18 extends into the water collecting chamber 10, and the water outlet pipe 19 passes through the top plate 7 and extends to above the recovery water pit 5. A lifting drive assembly is connected to the water collecting chamber 10, which can drive the water collecting pan 9 to rise and fall for drainage. A diversion assembly is connected to the bracket 6, which can divert the water discharged from the water collecting pan 9 to the recovery water pit 5.

[0032] According to an optional embodiment of the present invention, the lifting drive assembly includes a transmission rope 11, a drum 12, a gear 13, a waterproof motor 14, a transmission shaft 15, a gear 2 16 and a fixed plate 20, one end of the transmission rope 11 is fixedly connected to the bottom wall of the top plate 7, the inner wall of the water collecting chamber 10 is rotatably connected with the gear 13, the gear 13 is fixedly connected with the drum 12, the other end of the transmission rope 11 is fixedly connected to the drum 12, more than two transmission ropes 11 can be provided to enable the water collecting tray 9 to be lifted and lowered without large-scale shaking and rotation, the transmission rope 11 can adopt a Dyneema rope with good corrosion resistance and moisture resistance, the waterproof motor 14 is fixedly connected to the inner wall of the water collecting chamber 10, the transmission shaft 15 is fixedly connected to the output shaft of the waterproof motor 14, the gear 2 1 6 is fixedly connected to the transmission shaft 15, the transmission shaft 15 is fixedly connected to the impeller rotatably connected to the water pump 17, the transmission shaft 15 can drive the impeller to rotate so that the water pump 17 can absorb water, the fixed plate 20 is fixedly connected to the inner wall of the water collecting chamber 10, the gear plate 21 and the transmission plate 24 are both slidably connected to the fixed plate 20, a transmission channel 22 is opened on the gear plate 21, a gear three 23 is rotatably connected to the gear plate 21, a transmission roller 25 is rotatably connected to the transmission plate 24, the transmission roller 25 is slidably connected to the inner wall of the transmission channel 22, an extension bar 26 is fixedly connected to the transmission plate 24, a hollow floating member 27 is fixedly connected to the extension bar 26, the hollow floating member 27 can float on the liquid surface, and a permanent magnet 1 271 is fixedly connected to the hollow floating member 27;

[0033] The bottom wall of the top plate 7 is fixedly connected with a connecting rod 35 and a connecting seat 37, the lower end of the connecting rod 35 is fixedly connected with a permanent magnet three 36, the bottom wall of the connecting seat 37 is fixedly connected with a guide plate 38, and a slide plate 40 is slidably connected to the guide plate 38. The top wall of the slide plate 40 is connected to the bottom wall of the connecting seat 37 through an elastic member two 39.

[0034] According to an optional embodiment of the present invention, the bottom wall of the slide plate 40 is fixedly connected to an extension rod 41, and the lower end of the extension rod 41 is fixedly connected to a permanent magnet 42;

[0035] The guide assembly includes a fixed guide plate 28 and a sliding guide plate 30. The fixed guide plate 28 is provided with a guide cavity 29, and the bottom wall of the guide cavity 29 is in the shape of an inclined surface, so that water can flow into the recovery pit 5 under the action of gravity. The top wall of the fixed guide plate 28 is fixedly connected with a connecting plate 33. The sliding guide plate 30 is slidably connected to the top wall of the fixed guide plate 28. The sliding guide plate 30 is provided with a guide cavity 2 31, and the bottom wall of the guide cavity 2 31 is in the shape of an inclined surface, so that water can flow into the guide cavity 29 under the action of gravity. The top wall of the sliding guide plate 30 is fixedly connected with a permanent magnet 2 32, and the side wall of the sliding guide plate 30 is connected to the connecting plate 33 through an elastic member 1 34.

[0036] According to an optional embodiment of the present invention, the guide chamber 1 29 is connected to the top wall of the fixed guide plate 28 and the side wall of the fixed guide plate 28, so as to facilitate water to enter and leave the guide chamber 1 29, and the guide chamber 2 31 is connected to the top wall of the sliding guide plate 30 and the side wall of the sliding guide plate 30, so as to facilitate water to enter and leave the guide chamber 2 31.

[0037] According to an optional implementation of the present invention, the water outlet pipe 19 is a soft pipe, which facilitates the smooth lifting and lowering of the water collecting tray 9.

[0038] According to an optional implementation of the present invention, a motor seat 8 is fixedly connected to the inner wall of the water collecting chamber 10 , and the waterproof motor 14 is fixedly connected to the motor seat 8 .

[0039] According to an optional implementation of the present invention, the hollow floating member 27 is made of PE plastic, which is light in weight, so that the hollow floating member 27 can easily float on the water surface.

[0040] According to an optional embodiment of the present invention, the permanent magnet three 36 is tiltedly arranged at the lower end of the connecting rod 35 to adapt to the magnetic linkage with the permanent magnet three 271 when the water collecting tray 9 is tilted.

[0041] According to an optional embodiment of the present invention, the side wall of the water collecting well 4 is inclined, and the water collecting tray 9 is in a cone shape, so that the water collecting tray 9 can be lowered to offset the side wall of the water collecting well 4.

[0042] According to an optional embodiment of the present invention, a water purification component is provided in the recovery water pit 5. The water purification component purifies water so that the water can be used for washing tools and hands, thereby saving water resources.

[0043] Implementation process:

[0044] When the water inflow into the water collection well 4 is within a normal range, the waterproof motor 14 is turned on, and the output shaft of the waterproof motor 14 drives the transmission shaft 15, the gear 2 16 and the impeller in the water pump 17 to rotate, so that the water flowing into the water collection chamber 10 is pumped to the outlet pipe 19 through the suction pipe 18 and then discharged into the recovery pit 5.

[0045] When there is too much groundwater or it rains, the water inflow into the water collection well 4 is large, and only the drainage speed of the water pump 17 is slower than the water inflow speed into the water collection chamber 10. The water level in the water collection chamber 10 gradually rises, thereby driving the hollow floating member 27, the transmission plate 24, and the transmission roller 25 to move upward, and the transmission roller 25 slides on the inner wall of the transmission channel 22, so that the gear plate 21 and the gear three 23 move right, and the gear three 23 is meshed with the gear one 13 and the gear two 16. The gear two 16 drives the gear three 23, the gear one 13, and the drum 12 to rotate, and the drum 12 reels the transmission rope 11, so that the water collection tray 9 gradually moves upward, and the water collection tray 9 will not touch the sliding guide plate 30 during the upward movement.

[0046] When the water collecting tray 9 moves upward, the right end of the top wall of the water collecting tray 9 will gradually push the slide plate 40, the extension rod 41, and the permanent magnet four 42 to overcome the elastic force of the elastic member 2 39 and move upward. When the elastic member 2 39 is compressed to the limit state, the slide plate 40 stops moving upward, and the permanent magnet four 42 moves to the right of the permanent magnet two 32. The magnetic repulsion of the permanent magnet four 42 makes the permanent magnet two 32 and the sliding guide plate 30 overcome the elastic force of the elastic member one 34 and move to the left. The water collecting tray 9 continues to move upward, and the water collecting tray 9 will tilt to the right. The water in the water collecting chamber 10 will gradually pour out to the guide chamber two 31 and then flow to the guide chamber one 29, and then flow into the recovery puddle 5 for collection, thereby quickly draining most of the water in the water collecting chamber 10. The water is separated, and then the magnetic repulsion of permanent magnet three 36 repels permanent magnet one 271, thereby resetting the hollow floating part 27, the transmission plate 24, and the transmission roller 25, thereby resetting the gear plate 21 and the gear three 23, and the gear three 23 is disengaged from the meshing with the gear one 13 and the gear two 16. The water collecting tray 9 falls back into the water collecting well 4 under the action of its own gravity and abuts against the inner wall of the water collecting well 4. The reel 12 releases the transmission rope 11, and the slide plate 40 and the permanent magnet four 42 lose the thrust of the water collecting tray 9 and then move downward and reset under the elastic force of the elastic member two 39. The sliding guide plate 30 moves right and resets under the elastic force of the elastic member one 34 to prevent obstruction to the falling water collecting tray 9.

[0047] The present invention can control the water pump 17 to discharge the water in the water collecting chamber 10 to the recovery puddle 5 when the water inflow speed in the water collecting chamber 10 is normal, only by driving a waterproof motor 14. When the water inflow speed in the water collecting chamber 10 exceeds the normal water inflow speed, the waterproof motor 14 automatically drives the drum 12 to reel in the transmission rope 11 through the detection of the hollow floating part 27, thereby driving the water collecting plate 9 to move up, so that the water collecting plate 9 can quickly drain the water onto the sliding guide plate 30 and the fixed guide plate 28 in a dumping manner, and then enter the recovery puddle 5 after diversion, and quickly drain most of the water in the water collecting well 4 to prevent the water level from being too high and affecting the stability of the foundation pit 2. The water collecting plate 9 can automatically re-enter the water collecting well 4 after drainage, without the need to set up too many driving components. The present invention has high linkage and fast drainage speed, thereby improving the safety of the foundation pit 2.

[0048] According to an optional embodiment of the present invention, the bottom wall of the drainage ditch 3 is 0.5m to 0.6m lower than the bottom wall of the foundation pit 2, and a safety warning component is arranged on the bottom wall of the foundation pit 2. The safety warning component is 0.3m to 0.5m away from the edge of the wellhead of the water collection well 4 to prevent people from accidentally falling into the water collection well 4.

[0049] The components, modules, mechanisms and devices not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A foundation pit construction method based on rapid drainage, Its characteristics are: The following steps are involved: A foundation pit (2) and a water recovery pit (5) are provided on the ground (1), a drainage ditch (3) and a water collection well (4) are provided on the inner wall of the foundation pit (2), the drainage ditch (3) and the water collection well (4) are communicated, a bracket (6) is fixedly connected to the top wall of the ground (1), the bracket (6) is fixedly connected to the top wall of the top plate (7), a water collection tray (9) is liftably connected to the top plate (7), the water collection tray (9) extends into the water collection well (4) and abuts against the inner wall of the water collection well (4), a water pump (17) is fixedly connected to the inner wall of the water collection tray (9), a water suction pipe (18) and a water outlet pipe (19) are fixedly connected to the water pump (17), the water suction pipe (18) extends into the water collection chamber (10), the water outlet pipe (19) passes through the top plate (7) and extends to the top of the water recovery pit (5), a lifting drive assembly is connected to the water collection chamber (10), and a flow guide assembly is connected to the bracket (6); The lifting drive assembly comprises a transmission rope (11), a reel (12), a gear 1 (13), a waterproof motor (14), a transmission shaft (15), a gear 2 (16) and a fixing plate (20), one end of the transmission rope (11) is fixedly connected to the bottom wall of the top plate (7), the inner wall of the water collecting chamber (10) is rotatably connected to the gear 1 (13), the reel (12) is fixedly connected to the gear 1 (13), the other end of the transmission rope (11) is fixedly connected to the reel (12), the waterproof motor (14) is fixedly connected to the inner wall of the water collecting chamber (10), the transmission shaft (15) is fixedly connected to the output shaft of the waterproof motor (14), the gear 2 (16) is fixedly connected to the transmission shaft (15), and the transmission shaft (15) is fixedly connected to the output shaft of the waterproof motor (14). ) is fixedly connected to an impeller in a water pump (17) that is rotatably connected, a fixed plate (20) is fixedly connected to the inner wall of the water collecting chamber (10), a gear plate (21) and a transmission plate (24) are both slidably connected to the fixed plate (20), a transmission channel (22) is provided on the gear plate (21), a gear three (23) is rotatably connected to the gear plate (21), a transmission roller (25) is rotatably connected to the transmission plate (24), the transmission roller (25) is slidably connected to the inner wall of the transmission channel (22), an extension bar (26) is fixedly connected to the transmission plate (24), a hollow floating member (27) is fixedly connected to the extension bar (26), and a permanent magnet one (271) is fixedly connected to the hollow floating member (27); The bottom wall of the top plate (7) is fixedly connected to a connecting rod (35) and a connecting seat (37); the lower end of the connecting rod (35) is fixedly connected to a third permanent magnet (36); the bottom wall of the connecting seat (37) is fixedly connected to a guide plate (38); a slide plate (40) is slidably connected to the guide plate (38); and the top wall of the slide plate (40) is connected to the bottom wall of the connecting seat (37) via a second elastic member (39); An extension rod (41) is fixedly connected to the bottom wall of the slide plate (40), and a permanent magnet (42) is fixedly connected to the lower end of the extension rod (41); The guide assembly comprises a fixed guide plate (28) and a sliding guide plate (30); the fixed guide plate (28) is provided with a guide cavity 1 (29); the bottom wall of the guide cavity 1 (29) is in the shape of an inclined surface; the top wall of the fixed guide plate (28) is fixedly connected to a connecting plate (33); the sliding guide plate (30) is slidably connected to the top wall of the fixed guide plate (28); the sliding guide plate (30) is provided with a guide cavity 2 (31); the bottom wall of the guide cavity 2 (31) is in the shape of an inclined surface; the top wall of the sliding guide plate (30) is fixedly connected to a permanent magnet 2 (32); and the side wall of the sliding guide plate (30) is connected to the connecting plate (33) via an elastic member 1 (34); The guide cavity 1 (29) is in communication with the top wall of the fixed guide plate (28) and the side wall of the fixed guide plate (28), and the guide cavity 2 (31) is in communication with the top wall of the sliding guide plate (30) and the side wall of the sliding guide plate (30).

2. A foundation pit construction method based on rapid drainage according to claim 1, Its characteristics are: The water outlet pipe (19) is a soft pipe.

3. A foundation pit construction method based on rapid drainage according to claim 2, Its characteristics are: A motor seat (8) is fixedly connected to the inner wall of the water collecting chamber (10), and the waterproof motor (14) is fixedly connected to the motor seat (8).

4. A foundation pit construction method based on rapid drainage according to claim 3, Its characteristics are: The hollow floating member (27) is made of PE plastic.

5. A foundation pit construction method based on rapid drainage according to claim 4, Its characteristics are: The permanent magnet three (36) is arranged obliquely at the lower end of the connecting rod (35).

6. A foundation pit construction method based on rapid drainage according to claim 5, Its characteristics are: The side wall of the water collecting well (4) is inclined, and the water collecting tray (9) is in the shape of a cone.

7. A foundation pit construction method based on rapid drainage according to any one of claims 1 to 6, Its characteristics are: A water purification component is provided in the recovery water pit (5).

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