House building foundation drainage structure and construction method thereof

Abstract

The application relates to a house building foundation drainage structure and a construction method thereof, which comprises a sewage pipeline and an inspection well; further comprises a plurality of supporting seats used for being placed in a groove, the top of the supporting seat is provided with a plurality of supporting frames, the supporting frames are sequentially and interval arranged along the length direction of the sewage pipeline; a ring groove is coaxially arranged on the outer circumferential surface of the sewage pipeline, the ring groove is sequentially and interval arranged along the length direction of the sewage pipeline; the top of the supporting frame is used for being inserted and limited in the respective opposite ring groove; the bottom of the supporting seat is rotationally provided with a driving wheel used for being in contact with the bottom wall of the groove, and the supporting seat is slidably arranged in the groove through the driving wheel. The application has the effects of ensuring the reliability and the sealing performance of the connection part of the sewage pipeline and the inspection well during construction.

Description

Technical Field

[0001] This application relates to the field of building drainage construction technology, and in particular to a building foundation drainage structure and its construction method. Background Technology

[0002] Currently, building drainage systems mainly consist of internal and external drainage systems. Internal drainage systems primarily include drainage structures for areas such as bathrooms, kitchens, and laundry rooms. External drainage systems mainly include rainwater drainage structures and sewage drainage structures. The sewage drainage structure includes underground sewage pipes and inspection wells installed on these pipes. The sewage pipes are primarily used to discharge sewage collected by the internal drainage system into the sewer system, while the inspection wells are used by maintenance personnel to inspect the internal condition of the sewage pipes and facilitate unclogging.

[0003] When constructing sewage pipes, it is usually necessary to first excavate a trench, then place multiple sections of sewage pipes neatly in the trench along the drainage direction, and then waterproof and seal the joints of the sewage pipes. Next, manholes are installed by inserting the end of the sewage pipe into the manhole and then pouring concrete into the manhole. After the manhole passes the water tightness test, the trench is backfilled with earth.

[0004] Regarding the aforementioned drainage structure, when the end of the sewage pipe is inserted into the inspection well and concrete is poured, due to the influence of the inspection well base, there will inevitably be a certain height difference between the sewage pipe and the bottom wall of the trench. Therefore, the sewage pipe will be suspended in the air. Before the concrete has fully solidified, if the sewage pipe is hit by an external force, it will be very easy for it to shift relative to the inspection well, which will directly affect the reliability and sealing of the connection between the two. Summary of the Invention

[0005] This application provides a building foundation drainage structure and its construction method, which can ensure the reliability and sealing of the connection between sewage pipes and inspection wells during construction.

[0006] The technical solution for a building foundation drainage structure provided in this application is as follows:

[0007] A building foundation drainage structure includes a sewage pipe and an inspection well; it also includes multiple support seats for placement in a trench, each support seat having multiple support frames on its top, the support frames being arranged at intervals along the length of the sewage pipe; annular grooves are coaxially arranged on the outer circumference of the sewage pipe, the annular grooves being arranged at intervals along the length of the sewage pipe; the top of each support frame is used to insert into and limit its respective annular groove; the bottom of each support seat is rotatably provided with a drive wheel for contacting the bottom wall of the trench, and the support seat is slidably disposed in the trench via the drive wheel.

[0008] Preferably, the support base is provided with guide rods extending along the length of the sewage pipe, and the guide rods are symmetrically arranged on the outer side walls of the support bases facing away from each other; the end of the guide rod facing the adjacent support base is provided with a bidirectional internal threaded tube, and the adjacent support bases are connected to the bidirectional internal threaded tubes in sequence through the guide rods; the guide rods are respectively inserted into and threaded into the bidirectional internal threaded tubes from both ends, and the bidirectional internal threaded tubes are used to drive the two guide rods at both ends to move synchronously in a direction that approaches or moves away from each other.

[0009] Preferably, a screw is rotatably mounted on the support base, and a lifting plate is also mounted on the support base and slidably mounted on the support base along the length of the screw. The screw passes through the lifting plate and is threadedly connected to the lifting plate. The support frame is mounted on the lifting plate, and the screw is used to drive the support frame to move up or down toward the sewage pipe.

[0010] Preferably, the outer wall of the inspection well has a through-hole for inserting the end of a sewage pipe, and a slide rod is provided on the support seat facing the outer wall of the inspection well. The outer wall of the inspection well facing the slide rod has a through-hole for inserting the slide rod into the inspection well. A clamping seat is detachably installed on the slide rod inserted into the inspection well, and the clamping seat is provided with a clamping component for clamping and fixing the end of the sewage pipe.

[0011] Preferably, the clamping assembly includes a bidirectional lead screw rotatably mounted on a clamping seat, the length of which extends along the inner diameter of the sewage pipe; both ends of the bidirectional lead screw are threadedly connected to clamping members for extending into the sewage pipe, and the bidirectional lead screw is used to drive the clamping members at both ends to move synchronously toward or away from each other; the inner wall of the sewage pipe is coaxially integrally formed with multiple limiting rings, and a limiting groove is formed between adjacent limiting rings for inserting the clamping members, the outer wall of the clamping member inserted into the limiting groove is in contact with the inner wall of the limiting groove.

[0012] Preferably, the bottom of the clamping seat is rotatably provided with rollers placed on the bottom wall of the inspection well, and the clamping seat is moved and positioned inside the inspection well by means of the rollers; the inspection well is provided with two insertion holes, and the insertion holes are symmetrically arranged on both sides of the inspection well; a placement platform is provided on the side of the clamping seat away from the clamping assembly, and the end of the placement platform away from the clamping seat is used to be mounted on the inner wall of the sewage pipe.

[0013] Preferably, the clamping seat is provided with a limiting frame facing the placement platform, one end of the placement platform is mounted on the limiting frame, the placement platform has a through hole, and the limiting frame is provided with a plug-in post for insertion into the through hole; the end of the placement platform away from the through hole is provided with a limiting plate for insertion into the limiting groove.

[0014] Preferably, a fixing seat is provided on the outer wall of the inspection well, and a pin hole is provided on the fixing seat. A pin rod is provided on the support seat for insertion into the pin hole. The pin rod is slidably disposed on the support seat along the length direction perpendicular to the sewage pipe. A pressure spring is sleeved on the outside of the pin rod, and the pressure spring is used to drive the pin rod to be tightly inserted into the pin hole.

[0015] A construction method for building foundation drainage structure, applied to the aforementioned building foundation drainage structure.

[0016] S1: Excavate a trench and lay a sand cushion layer at the bottom of the trench;

[0017] S2: Place the support bases sequentially along the length of the sewage pipe to be laid in the designated construction area of ​​the trench, and connect each support base sequentially;

[0018] S3: Place the sewage pipes and inspection wells, and sequentially erect the sewage pipes above the support frames, ensuring that the support frames are respectively inserted into and confined within their respective corresponding annular grooves:

[0019] S4: Install the clamping seat on the slide rod that extends into the inspection well, and then clamp and fix the end of the sewage pipe through the clamping assembly; then push the sewage pipe towards the inspection well through the support seat until the pin is inserted into the pin hole, at which point the support seat will be fixed outside the inspection well.

[0020] S5: The sewage pipe is cast onto the inspection well with concrete. After the concrete has completely solidified, the support base is removed from the trench. Finally, the trench is backfilled with earth.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The sewage pipe is supported by a support frame, ensuring that the sewage pipe inserted into the inspection well is no longer suspended, greatly enhancing the support and limiting effect on the sewage pipe. When the end of the sewage pipe is successfully inserted into the designated depth of the inspection well, the pin will automatically insert into the pin hole set on the inspection well under the action of the pressure spring. Through the mutual insertion and cooperation of the pin and the pin hole, the support can be locked outside the inspection well. Under the above state, the sewage pipe can be effectively prevented from detaching from the inspection well, ensuring the reliability and sealing of the connection between the sewage pipe and the inspection well during construction.

[0023] 2. The clamping assembly clamps the end of the sewage pipe, thereby applying tension to the end of the sewage pipe when it is pushed into the inspection well, ensuring that the sewage pipe can be inserted into the inspection well more smoothly; making the pushing force on the sewage pipe more even; in addition, the clamping assembly can also provide a certain support for the inner wall of the sewage pipe, so that the inner wall of the sewage pipe is less likely to collapse or deform when inserted into the inspection well;

[0024] 3. When it is necessary to dredge the inside of the sewage pipe later, the support frame can be fixed to the inner wall of the opposite sewage pipe with the help of the clamping components. Then, one end of the placement platform is set up inside the sewage pipe to be dredged, and the other end of the placement platform is inserted into the plug-in column. At this time, the placement platform set up between the two sewage pipes can provide a relatively clean working platform for the pipe dredging equipment, which greatly reduces the probability of the pipe dredging equipment accidentally falling into the sewage at the bottom of the inspection well, and facilitates the smooth progress of the subsequent dredging work. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0026] Figure 2 yes Figure 1 A partial structural diagram showing the concealed sewage pipes;

[0027] Figure 3 yes Figure 2 A schematic diagram of a partial structural explosion;

[0028] Figure 4 This is a schematic cross-sectional view highlighting a portion of the clamping seat located inside the inspection well;

[0029] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Sewage pipe; 10. Ring groove; 11. Limiting ring; 12. Limiting groove; 2. Inspection well; 20. Insertion hole; 21. Insertion hole; 22. Fixing seat; 23. Pin hole; 3. Support seat; 30. Support frame; 31. Drive wheel; 32. Guide rod; 33. Bidirectional internal threaded pipe; 34. Screw; 35. Lifting plate; 36. Slide rod; 4. Clamping seat; 40. Roller; 41. Limiting frame; 42. Insertion post; 5. Clamping assembly; 50. Bidirectional screw; 51. Clamping component; 6. Placement platform; 60. Through hole; 61. Limiting plate; 7. Pin rod; 70. Pressure spring. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] This application discloses a building foundation drainage structure, such as... Figure 1 , Figure 2 As shown, it includes a sewage pipe 1 and an inspection well 2 for installation in a trench. It also includes a plurality of support seats 3 for being placed in the trench at intervals along the laying direction of the sewage pipe 1. The bottom of the support seat 3 is rotatably provided with a drive wheel 31 for contacting the bottom wall of the trench. The support seat 3 is slidably disposed in the trench along the length direction of the sewage pipe 1 by means of the bottom drive wheel 31.

[0033] like Figure 2 As shown, guide rods 32 extending along the length of the sewage pipe 1 are provided on the outer wall of the support base 3 facing the adjacent support base 3. The guide rods 32 are symmetrically arranged on the front and rear outer walls of the support base 3, facing away from each other. There are two guide rods 32 on the same side of the support base 3, and the two guide rods 32 are symmetrically arranged on the left and right sides of the support base 3. A bidirectional internal threaded tube 33 is provided at one end of the guide rod 32 facing the adjacent support base 3. The two adjacent support bases 3 are connected and fixed to the bidirectional internal threaded tube 33 in sequence through the guide rods 32. The inner walls of the two ends of the bidirectional internal threaded tube 33 are symmetrically provided with reverse internal threads. The guide rods 32 are inserted into and threaded into the respective bidirectional internal threaded tubes 33 from both ends of the bidirectional internal threaded tube 33.

[0034] By rotating the bidirectional internal threaded tube 33, the guide rods 32 at both ends can be driven to move synchronously toward each other or toward each other, thereby enabling the spacing between adjacent support seats 3 to be freely adjusted to adapt to the support of sewage pipes 1 of different lengths.

[0035] like Figure 2 , Figure 3As shown, a vertically placed screw 34 is rotatably mounted on the support base 3. A lifting plate 35 is also slidably mounted on the support base 3 along the length of the screw 34. The screw 34 passes through the lifting plate 35 and is threadedly connected to it. Two symmetrically arranged smooth rods are fixedly mounted on the support base 3 on both sides of the screw 34. The smooth rods are parallel to the screw 34. The lifting plate 35 is movably mounted on the smooth rod along its length, and rises and falls along the length of the screw 34 under the guidance of the two smooth rods.

[0036] like Figure 2 , Figure 3 As shown, multiple support frames 30 are fixedly installed on the top of the lifting plate 35, arranged at intervals along the length of the sewage pipe 1. The bottom of the screw 34 passes through the bottom wall of the support base 3, and a handwheel is fixedly installed on the screw 34 coaxially. By rotating the handwheel, the screw 34 is driven to rotate on the support base 3. As the screw 34 rotates, the lifting plate 35 and the support frame 30 can be driven to rise or fall towards or away from the sewage pipe 1.

[0037] like Figure 2 , Figure 3 As shown, multiple annular grooves 10 are coaxially arranged on the outer circumference of the sewage pipe 1. The annular grooves 10 are arranged evenly at intervals along the length of the sewage pipe 1. The top of the support frame 30 is inserted into and confined within its respective annular groove 10. The support frame 30 supports the bottom of the sewage pipe 1, thereby preventing the sewage pipe 1 from being suspended and improving the overall stability of the sewage pipe 1. When it is necessary to release the support frame 30 from the sewage pipe 1, the screw 34 is rotated by turning the handwheel in the opposite direction, which drives the support frame 30 to descend away from the sewage pipe 1.

[0038] like Figure 1 , Figure 3 As shown, a fixing seat 22 is fixedly installed on the outer wall of the inspection well 2 facing the support seat 3. A pin hole 23 extends horizontally through the fixing seat 22. A pin rod 7 for insertion into the pin hole 23 is provided on the top of the support seat 3. The pin rod 7 is slidably mounted on the support seat 3 along a direction perpendicular to the length of the sewage pipe 1. A pressure spring 70 is sleeved on the outside of the pin rod 7, and the pressure spring 70 extends and retracts along the sliding direction of the pin rod 7. One end of the pressure spring 70 is connected and fixed to the pin rod 7, and the other end is connected and fixed to the outer wall of the support seat 3. In its natural state, the pressure spring 70 is used to drive the pin rod 7 to be tightly inserted into its respective pin hole 23.

[0039] like Figure 1 , Figure 3As shown, a guide ramp is provided on the outer wall of the pin rod 7 facing the fixed seat 22. When the support seat 3 and the sewage pipe 1 are pushed together towards the inspection well 2, the end of the sewage pipe 1 will gradually be inserted into the inspection well 2. At this time, the pin rod 7 will also move closer to the fixed seat 22 along with the support seat 3. When the guide ramp at the end of the pin rod 7 moves to contact the outer wall of the fixed seat 22, as the support seat 3 moves further forward, the pin rod 7 will move away from the fixed seat 22 under the guidance of the guide ramp. At this time, the pressure spring 70 will be continuously stretched and stored. When the end of the pin rod 7 moves to be directly opposite the pin hole 23, the pressure spring 70, which is in a stored state, will drive the end of the pin rod 7 to be tightly inserted into the pin hole 23. Through the mutual insertion and cooperation of the pin rod 7 and the pin hole 23, the support seat 3 can be locked outside the inspection well 2. In the above state, the sewage pipe 1 can be effectively prevented from detaching from the inspection well 2, ensuring the reliability and sealing of the connection between the sewage pipe 1 and the inspection well 2 during construction. The entire locking process is completed automatically, and the locking process is quick and convenient.

[0040] like Figure 1 , Figure 3 As shown, two insertion holes 20 are provided on the outer wall of the inspection well 2 for inserting the end of the sewage pipe 1 into the inspection well 2. The insertion holes 20 are symmetrically arranged on both sides of the inspection well 2. Two sliding rods 36 are fixedly installed on the support base 3 facing the outer wall of the inspection well 2. The sliding rods 36 are symmetrically arranged on the left and right sides of the support base 3. Insertion holes 21 are provided on the outer wall of the inspection well 2 facing each sliding rod 36 for inserting the sliding rod 36 into the inspection well 2. The two sliding rods 36 inserted into the inspection well 2 through the insertion holes 21 are detachably installed with clamping seats 4 by bolts and nuts. The clamping seats 4 are provided with clamping components 5 for clamping and fixing the end of the sewage pipe 1.

[0041] like Figure 4 , Figure 5 As shown, the clamping assembly 5 includes a bidirectional lead screw 50 rotatably mounted on the clamping seat 4. The length of the bidirectional lead screw 50 extends along the inner diameter of the sewage pipe 1. Both ends of the bidirectional lead screw 50 are threadedly connected to clamping members 51 for extending into the sewage pipe 1. The end of the clamping member 51 facing the clamping seat 4 is in contact with the outer wall of the clamping seat 4. A handwheel is coaxially fixed at the top of the bidirectional lead screw 50. Rotating the handwheel drives the bidirectional lead screw 50 to rotate. As the bidirectional lead screw 50 rotates, it drives the clamping members 51 at both ends to move synchronously towards or away from each other.

[0042] like Figure 4 , Figure 5As shown, two limiting rings 11 are integrally formed coaxially on the inner wall of the end of the sewage pipe 1. A limiting groove 12 is formed between adjacent limiting rings 11 for inserting the end of the clamping member 51 away from the clamping seat 4 radially into the sewage pipe 1. The outer wall of the clamping member 51 inserted into the limiting groove 12 is in contact with the inner wall of the limiting groove 12. Through the mutual insertion and engagement of the clamping member 51 and the limiting groove 12, the connection between the clamping seat 4 and the end of the sewage pipe 1 can be established.

[0043] like Figure 4 , Figure 5 As shown, the bottom of the clamping seat 4 is rotatably equipped with rollers 40 placed on the bottom wall of the inspection well 2. The clamping seat 4 is moved along the length of the slide rod 36 inside the inspection well 2 via the rollers 40. When the support seat 3 is pushed, the clamping seat 4 located inside the inspection well 2 will move synchronously with the support seat 3.

[0044] The clamping component 5 clamps the end of the sewage pipe 1, thereby applying a pulling force to the end of the sewage pipe 1 when it is pushed into the inspection well 2, ensuring that the sewage pipe 1 can be inserted into the inspection well 2 more smoothly. This makes the pushing force on the sewage pipe 1 more even. In addition, the clamping component 51 can also provide a certain support to the inner wall of the sewage pipe 1, so that the inner wall of the sewage pipe 1 is less likely to collapse or deform when it is inserted into the inspection well 2.

[0045] like Figure 3 , Figure 4 As shown, a placement platform 6 is detachably installed on the side of the clamping base 4 away from the clamping assembly 5. The end of the placement platform 6 away from the clamping base 4 is used to be mounted on the inner wall of the opposite sewage pipe 1. A limiting frame 41 facing the placement platform 6 is fixedly installed on the clamping base 4, and the end of the placement platform 6 near the clamping base 4 is mounted on the limiting frame 41. A through hole 60 is provided vertically through the placement platform 6, and a plug post 42 for insertion into the through hole 60 from bottom to top is provided on the limiting frame 41. A limiting plate 61 for insertion into the limiting groove 12 is integrally formed on the end of the placement platform 6 away from the through hole 60. The placement platform 6 is made of plastic with a certain deformation capability.

[0046] When it is necessary to dredge the inside of the sewage pipe 1 later, the clamping seat 4 can be fixed to the inner wall of the opposite sewage pipe 1 with the help of the clamping component 5. Then, one end of the placement platform 6 is set up inside the sewage pipe 1 to be dredged, and the other end of the placement platform 6 is inserted into the plug post 42 of the limiting frame 41 through the through hole 60. At this time, the placement platform 6 set up between the two sewage pipes 1 can provide a relatively clean working platform for the pipe dredging equipment, which greatly reduces the probability of the pipe dredging equipment accidentally falling into the sewage at the bottom of the inspection well 2, and facilitates the smooth progress of the later dredging work.

[0047] This application also discloses a construction method for a building foundation drainage structure, applied to the aforementioned building foundation drainage structure. It includes:

[0048] S1: Excavate a trench and lay a sand cushion layer at the bottom of the trench;

[0049] S2: Place the support bases 3 sequentially along the length of the sewage pipe 1 to be laid in the designated construction area of ​​the trench, and connect each support base 3 in sequence;

[0050] S3: Place sewage pipe 1 and inspection well 2, and install sewage pipe 1 sequentially above support frame 30, ensuring that support frame 30 is inserted into and confined within its respective corresponding annular groove 10:

[0051] S4: Install the clamping seat 4 on the slide rod 36 that extends into the inspection well 2, and then clamp and fix the end of the sewage pipe 1 through the clamping assembly 5; then push the sewage pipe 1 towards the inspection well 2 through the support seat 3 until the pin 7 is inserted into the pin hole 23, at which point the support seat 3 will be fixed to the outside of the inspection well 2.

[0052] S5: Concrete the sewage pipe 1 onto the inspection well 2. After the concrete has completely solidified, remove the support 3 from the trench. Finally, backfill the trench with earthwork.

[0053] The implementation principle is as follows:

[0054] The sewage pipe 1 is supported by the support frame 30, so that the sewage pipe 1 inserted into one end of the inspection well 2 is no longer suspended, greatly enhancing the support and limiting effect of the sewage pipe 1. When the end of the sewage pipe 1 is successfully inserted into the designated depth of the inspection well 2, the pin rod 7 will automatically insert into the pin hole 23 set on the inspection well 2 under the action of the pressure spring 70. Through the mutual insertion and cooperation of the pin rod 7 and the pin hole 23, the support seat 3 can be locked outside the inspection well 2. Under the above state, the sewage pipe 1 can be effectively prevented from detaching from the inspection well 2, ensuring the reliability and sealing of the connection between the sewage pipe 1 and the inspection well 2 during construction.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A building foundation drainage structure, comprising a sewage pipe (1) and an inspection well (2); characterized in that: It also includes multiple support seats (3) for placement in the trench, with multiple support frames (30) on the top of the support seats (3), the support frames (30) being arranged sequentially at intervals along the length of the sewage pipe (1); annular grooves (10) are coaxially arranged on the outer circumference of the sewage pipe (1), the annular grooves (10) being arranged sequentially at intervals along the length of the sewage pipe (1); the top of the support frame (30) is used to insert into and limit itself in its respective corresponding annular groove (10); the bottom of the support seat (3) is rotatably provided with a drive wheel (31) for contacting the bottom wall of the trench, and the support seat (3) is slidably disposed in the trench through the drive wheel (31); The outer wall of the inspection well (2) has a through hole (20) for inserting the end of the sewage pipe (1). A slide rod (36) is provided on the support seat (3) facing the outer wall of the inspection well (2). A through hole (21) for inserting the slide rod (36) into the inspection well (2) is provided on the outer wall of the inspection well (2). A clamping seat (4) is detachably installed on the slide rod (36) inserted into the inspection well (2). A clamping component (5) for clamping and fixing the end of the sewage pipe (1) is provided on the clamping seat (4). The clamping assembly (5) includes a bidirectional lead screw (50) rotatably mounted on the clamping seat (4), the length of which extends along the inner diameter of the sewage pipe (1); the two ends of the bidirectional lead screw (50) are respectively threaded with clamping members (51) for extending into the sewage pipe (1), and the bidirectional lead screw (50) is used to drive the clamping members (51) at both ends to move synchronously toward each other or away from each other; the inner wall of the sewage pipe (1) is coaxially integrally formed with multiple limiting rings (11), and a limiting groove (12) is formed between adjacent limiting rings (11) for the clamping members (51) to be inserted; the outer wall of the clamping member (51) inserted into the limiting groove (12) is in contact with the inner wall of the limiting groove (12); The clamping seat (4) is rotatably provided with rollers (40) placed on the inner bottom wall of the inspection well (2). The clamping seat (4) is moved and positioned inside the inspection well (2) by means of the rollers (40). There are two insertion holes (20) on the inspection well (2), and the insertion holes (20) are symmetrically arranged on both sides of the inspection well (2). A placement platform (6) is provided on the side of the clamping seat (4) away from the clamping assembly (5). The end of the placement platform (6) away from the clamping seat (4) is used to be mounted on the inner side wall of the sewage pipe (1). The clamping base (4) is provided with a limiting frame (41) facing the placement platform (6). One end of the placement platform (6) is mounted on the limiting frame (41). The placement platform (6) has a through hole (60). The limiting frame (41) is provided with a plug post (42) for insertion into the through hole (60). The end of the placement platform (6) away from the through hole (60) is provided with a limiting plate (61) for insertion into the limiting groove (12). A fixing seat (22) is provided on the outer wall of the inspection well (2), and a pin hole (23) is provided on the fixing seat (22). A pin rod (7) is provided on the support seat (3) for insertion into the pin hole (23). The pin rod (7) is slidably provided on the support seat (3) along the length direction perpendicular to the sewage pipe (1). A pressure spring (70) is sleeved on the outside of the pin rod (7), and the pressure spring (70) is used to drive the pin rod (7) to be inserted into the pin hole (23).

2. The building foundation drainage structure according to claim 1, characterized in that: The support base (3) is provided with a guide rod (32) extending along the length of the sewage pipe (1). The guide rod (32) is symmetrically arranged on the outer side walls of the support base (3) facing away from each other. The end of the guide rod (32) facing the adjacent support base (3) is provided with a bidirectional internal threaded tube (33). The adjacent support base (3) is connected to the bidirectional internal threaded tube (33) in sequence through the guide rod (32). The guide rod (32) is inserted into and threaded into the bidirectional internal threaded tube (33) from both ends. The bidirectional internal threaded tube (33) is used to drive the guide rods (32) at both ends to move synchronously toward each other or away from each other.

3. The building foundation drainage structure according to claim 2, characterized in that: A screw (34) is rotatably mounted on the support base (3). A lifting plate (35) is also mounted on the support base (3) and slidably mounted on the support base (3) along the length of the screw (34). The screw (34) passes through the lifting plate (35) and is threadedly connected to the lifting plate (35). The support frame (30) is mounted on the lifting plate (35). The screw (34) is used to drive the support frame (30) to move up or down towards the sewage pipe (1).

4. A construction method for a building foundation drainage structure, applied to the building foundation drainage structure described in claim 3 above, characterized in that: S1: Excavate a trench and lay a sand cushion layer at the bottom of the trench; S2: Place the support base (3) in the designated construction area of ​​the trench along the length of the sewage pipe (1) to be laid, and connect each of the support bases (3) in sequence; S3: Place the sewage pipe (1) and the inspection well (2), and install the sewage pipe (1) on the support frame (30) in sequence, ensuring that the support frame (30) is inserted into and confined in its respective corresponding annular groove (10): S4: Install the clamping seat (4) on the slide rod (36) that extends into the inspection well (2), and then clamp and fix the end of the sewage pipe (1) through the clamping assembly (5); then push the sewage pipe (1) towards the inspection well (2) through the support seat (3) until the pin rod (7) is inserted into the pin hole (23), at which time the support seat (3) will be fixed outside the inspection well (2); S5: The sewage pipe (1) is poured onto the inspection well (2) with concrete. After the concrete has completely solidified, the support base (3) is removed from the trench. Finally, the trench is backfilled with earth.

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