A pressure relief dewatering well and a method for basement construction using the dewatering well

Abstract

The present application relates to the field of underground drainage, and more particularly to a pressure relief drainage well and a method for using the drainage well to construct a basement, comprising a guide pipe for pumping out groundwater, wherein the guide pipe has an inner water stop ring sealed and fixedly connected to the circumferential outer wall, and a lower sleeve sealed and fixedly connected to the outer wall of the inner water stop ring, wherein the bottom end of the lower sleeve is located in the cushion layer, and the bottom surface of the inner water stop ring is attached to the upper surface of the cushion layer, so that it is difficult for groundwater to pass between the inner water stop ring and the lower sleeve, and even if there is groundwater at the lower surface of the inner water stop ring, due to the existence of the lower sleeve, it is difficult for groundwater to infiltrate from the periphery of the inner water stop ring, so that it is not easy for groundwater to infiltrate from the guide pipe to between the cushion layer and the bottom plate.

Description

Technical Field

[0001] The present application relates to the field of underground drainage, and in particular to a pressure relief drainage well and a method for using the drainage well to construct a basement. Background Art

[0002] When carrying out some underground construction projects, such as the basement construction of Wang Guowei Primary School (tentative name) in Haining City, which is undertaken by our company, it is necessary to first construct the cushion layer, which serves as the horizontal foundation, and then tie the steel bars on the horizontal surface of the cushion layer for convenience, and then pour the concrete of the bottom plate. Once the groundwater resources in the underground soil layer are relatively abundant, it is necessary to carry out underground drainage treatment to facilitate the smooth construction of the cushion layer and bottom plate in the underground project, and to make it as difficult as possible for the cushion layer and bottom plate to crack due to excessive pressure of groundwater after the construction is completed, so as to improve the construction quality.

[0003] The existing underground dewatering is generally carried out by the method of well point dewatering, that is, first drilling holes in the underground soil layer and then placing corresponding pipes into the holes, and then pumping out the groundwater through the corresponding vacuum pump to reduce the groundwater pressure.

[0004] With respect to the above-mentioned related technologies, the inventors believe that groundwater is likely to seep between the outer wall of the pipeline and the cushion layer and the bottom plate after casting, and there is a defect that the quality of the bottom plate cast later is easily affected at the location where the pipeline is set. Summary of the invention

[0005] In order to improve the quality of the base plate that is poured later at the location where the pipeline is set, the present application provides a pressure relief and dewatering well and a method for using the dewatering well to carry out basement construction.

[0006] In the first aspect, the present application provides a pressure relief well that adopts the following technical solution:

[0007] A pressure relief and dewatering well comprises a guide pipe for extracting groundwater, wherein the guide pipe is sealed and fixedly connected to an inner water stop ring on its circumferential outer wall, and a lower sleeve is sealed and fixedly connected to the outer wall of the inner water stop ring, the bottom end of the lower sleeve is located in a cushion layer, and the bottom surface of the inner water stop ring is attached to the upper surface of the cushion layer.

[0008] By adopting the above technical solution, it is difficult for groundwater to pass through the inner water stop ring and the guide pipe, and it is also difficult for groundwater to seep upward through the inner water stop ring and the lower sleeve, which greatly extends the infiltration path of groundwater and minimizes the occurrence of groundwater infiltration. It makes it less likely for groundwater to leak from the bottom plate at the corresponding upper sleeve arrangement, which helps to improve the construction quality of the bottom plate.

[0009] Optionally, the bottom end of the guide pipe is flush with the bottom surface of the cushion layer, and a gravel filter layer is provided at the bottom end of the guide pipe. The closer the gravel filter layer is to the inner water stop ring, the larger the particle size is. The gravel filter layer is provided with a gravel inner tube for the guide pipe to be inserted, and the upper end surface of the gravel inner tube is flush with the upper surface of the cushion layer. A filter cover is provided at the bottom end of the guide pipe to prevent the gravel filter layer from entering the guide pipe.

[0010] By adopting the above technical solution, the diversion pipe does not need to extend too far into the underground soil layer, reducing the construction difficulty. The setting of the crushed stone inner pipe makes it difficult for the bottom end of the diversion pipe to be filled with concrete slurry when the lower casing is placed into the cushion layer, so that the diversion pipe remains smooth.

[0011] Optionally, an upper sleeve is provided at the upper end of the lower sleeve, the outer diameter of the upper sleeve away from the lower sleeve is smaller than the outer diameter of the upper sleeve near the lower sleeve, and the end of the upper sleeve away from the lower sleeve is flush with the upper surface of the bottom plate.

[0012] By adopting the above technical solution, after the bottom plate is cast, even if the upper sleeve has a tendency to move upward due to the large groundwater pressure on the inner water stop ring, the inclined circumferential surface of the upper sleeve makes it less likely to move upward compared to a cylindrical upper sleeve, making it less likely for cracks to appear on the bottom plate at the corresponding position of the upper sleeve.

[0013] Optionally, an outer wall of the lower sleeve close to one end of the upper sleeve is sealed and fixedly connected with an outer water stop ring.

[0014] By adopting the above technical solution, the outer water-stop ring is located in the base plate, which further limits the positions of the upper sleeve and the lower sleeve. It also requires groundwater to bypass the outer water-stop ring when it seeps up from the outer wall of the upper sleeve, further increasing the difficulty of groundwater infiltration and further improving the quality of the base plate at the upper sleeve.

[0015] Optionally, the upper sleeve is inserted with several layers of steel mesh, each layer of the steel mesh is penetrated by a mesh hole, a mesh ring is provided at the mesh hole, the upper sleeve fits tightly to the inner wall of the mesh ring, and the steel mesh is tied to the bottom plate steel bars.

[0016] By adopting the above technical solution, the bottom plate is less likely to become hollow at the position of the upper sleeve, and the upper sleeve is less likely to move upward. Furthermore, even if the bottom plate is subjected to greater pressure at a position close to the upper sleeve, the presence of the steel mesh makes it less likely for the bottom plate to sink.

[0017] Optionally, the guide pipe includes a lower pipe sealed and connected to the inner water stop ring, a pipe valve threadedly connected to the lower pipe, and an upper pipe threadedly connected to the pipe valve at one end away from the lower pipe, and the pipe valve can control the connection between the upper pipe and the lower pipe.

[0018] By adopting the above technical scheme, the pipe valve and the upper pipe and the lower pipe can be assembled and connected. At the same time, after the precipitation is completed, pressure grouting can be performed in the gravel filter layer through the upper pipe, so as to further improve the stability of the gravel filter layer, and further make it less likely for the bottom plate to sink at the location where the upper sleeve is set. In addition, the threaded connection between the pipe valve and the lower pipe can better guarantee the pressure-bearing capacity between the pipe valve and the lower pipe compared with general welding, so that when pressure grouting is performed, the gravel filter layer can be grouted more fully, so that the gravel filter layer can better achieve the expected stability effect after pressure grouting.

[0019] Optionally, a screw plate is provided at one end of the lower tube near the tube valve, a fastening screw is provided on the screw plate around the axis of the lower tube, the tube valve is provided with a valve plate fitted to the screw plate, and the fastening screw is threadedly connected with a fastening nut that forces the valve plate to press against the screw plate.

[0020] By adopting the above technical scheme, when the valve plate and the screw plate are in close contact, the pipe valve is not easy to rotate excessively. At the same time, after the fastening nut is tightened, the pipe valve and the lower pipe are not easy to rotate at will. After the pressure grouting is completed, the pipe valve is closed. When the upper pipe needs to be rotated and removed, the pipe valve is not easy to be driven to rotate synchronously, so that the stable connection between the pipe valve and the lower pipe is not easy to be released at will.

[0021] In the second aspect, the present application provides a method for basement construction using a pressure relief well, which adopts the following technical solution:

[0022] A method for constructing a basement using a pressure relief well specifically comprises the following steps.

[0023] Step 1: excavate the foundation pit, lay a crushed stone filter layer at a predetermined position, then bury a crushed stone inner pipe in the crushed stone filter layer, pour a cushion layer on the bottom of the foundation pit, and after the cushion layer is poured and before the concrete solidifies, put the lower pipe into the crushed stone inner pipe in a vertical direction, and keep the lower casing in the cushion layer until the cushion layer solidifies;

[0024] Step 2: Open the pipe valve, connect the upper pipe to the corresponding hose to discharge the groundwater in time, and tie the bottom plate steel bars on the cushion layer;

[0025] Step 3: Pour the bottom slab concrete until it is flush with the upper end surface of the upper sleeve until the bottom slab concrete solidifies;

[0026] Step 4: Connect the upper pipe to the concrete delivery pump to perform pressure grouting on the gravel cushion. After the grouting is completed, close the pipe valve, then screw down the upper pipe and seal the pipe valve with a blind plug. Observe and ensure that there is no water seepage at the inner water stop ring and the pipe valve.

[0027] Step 5: Clean the upper surface of the inner water stop ring, then inject grout into the upper sleeve, vibrate and compact it, and then cover it with plastic film for maintenance;

[0028] Step 6. After the base slab is poured, the basement wall columns, basement side walls and basement top slab will be poured in sequence. After acceptance, waterproofing work will be carried out and finally backfilling will be carried out.

[0029] By adopting the above technical scheme, it is difficult for groundwater to pass through the inner water stop ring and the guide pipe, and it is also difficult to seep upward through the inner water stop ring and the lower sleeve, which greatly extends the infiltration path of groundwater and reduces the occurrence of groundwater infiltration as much as possible, making it less likely for groundwater to leak from the bottom plate at the corresponding upper sleeve arrangement, which helps to improve the construction quality of the bottom plate. In addition, the bottom end of the lower pipe does not need to extend too far into the underground soil layer, and the overall arrangement is more convenient. When meeting general precipitation needs, the overall precipitation operation does not require a large cost.

[0030] Optionally, in step 2, three layers of steel mesh are evenly tied at the bottom plate steel bars close to the upper sleeve.

[0031] By adopting the above technical solution, the bottom plate is less likely to become hollow at the position of the upper sleeve, and the upper sleeve is less likely to move upward. Furthermore, even if the bottom plate is subjected to greater pressure at a position close to the upper sleeve, the presence of the steel mesh makes it less likely for the bottom plate to sink.

[0032] Optionally, in step 5, after the concrete is initially vibrated and compacted and before the concrete initially sets, the concrete is compacted a second time and then covered with a plastic film.

[0033] By adopting the above technical solution, the plastic shrinkage of the concrete in the upper sleeve after solidification can be further reduced, which helps to improve the quality of the concrete poured in the upper sleeve.

[0034] In summary, the present application includes at least one of the following beneficial effects:

[0035] 1. It makes it difficult for groundwater to pass between the inner water stop ring and the guide pipe, and it is also difficult for groundwater to seep upwards through the inner water stop ring and the lower sleeve, which greatly extends the groundwater seepage path, reduces the groundwater seepage as much as possible, and makes it difficult for groundwater to seep through the bottom plate at the corresponding upper sleeve arrangement location, which helps to improve the construction quality of the bottom plate;

[0036] 2. The bottom of the lower pipe does not need to extend too far into the underground soil layer, and the overall layout is relatively convenient. When meeting general precipitation needs, the overall precipitation operation does not require a large cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a pressure relief and dewatering well in this application;

[0038] Figure 2 The steel mesh is removed, and the upper sleeve, the lower sleeve, the outer water stop ring and the crushed stone inner tube are cut to show the structural schematic diagram inside the lower sleeve and the crushed stone inner tube;

[0039] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0040] Explanation of the accompanying drawings: 1. guide pipe; 2. inner water stop ring; 21. screw plate; 22. fastening screw; 23. valve plate; 24. mesh ring; 25. fastening nut; 26. gravel inner tube; 27. mesh hole; 3. lower sleeve; 31. gravel filter layer; 32. upper sleeve; 33. outer water stop ring; 34. lower tube; 35. pipe valve; 36. upper tube; 37. filter cover; 38. steel mesh. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with the accompanying drawings.

[0042] The present application embodiment discloses a pressure relief well, referring to Figure 1 and Figure 2 , including a vertical guide pipe 1, the guide pipe 1 includes a vertical lower pipe 34, the upper end of the lower pipe 34 is threadedly connected and connected with a pipe valve 35, the pipe valve 35 can be a stainless steel two-piece ball valve, the upper end of the pipe valve 35 is threadedly connected and connected with a vertical upper pipe 36, the upper pipe 36 and the lower pipe 34 can both be DN25 galvanized steel pipes, the outer diameters of the upper pipe 36 and the lower pipe 34 can both be 25mm, and the upper pipe 36 can be provided with a pressure gauge and an automatic pressure relief valve to monitor the internal water pressure or concrete slurry pressure of the upper pipe 36 in real time.

[0043] Reference Figure 1 and Figure 2 A gravel filter layer 31 is laid on the bottom of the foundation pit. The horizontal cross-section of the gravel filter layer 31 is circular. The diameter of the gravel filter layer 31 can be 500 mm and the thickness can be 300 mm. The higher the height of the gravel filter layer 31, the larger its particle size. A corresponding trough is opened on the bottom of the foundation pit for laying the gravel filter layer 31 therein, so that the upper surface of the gravel filter layer 31 is flush with the bottom of the foundation pit. A gravel inner tube 26 is coaxially installed at the center of the gravel filter layer 31, and the bottom end of the gravel inner tube 26 extends into the gravel filter layer 31. The bottom end of the lower tube 34 is inserted into the gravel inner tube 26. A filter cover 37 is tightly inserted into the bottom end of the lower tube 34. The filter cover 37 can be a stainless steel mesh cover or a plastic mesh cover. The particle size of the gravel filter layer 31 attached to the filter cover 37 is large enough so that the corresponding gravel cannot pass through the filter cover 37, so that the groundwater that passes through the gravel filter layer 31 and the filter cover 37 and enters the lower tube 34 is not easy to contain large impurities.

[0044] Reference Figure 2 and Figure 3 The screw plate 21 is coaxially welded to the outer circumferential wall of the upper end of the lower tube 34. Several fastening screws 22 are evenly fixedly connected to the upper surface of the screw plate 21 around its own axis. The fastening screws 22 are vertical. The valve plate 23 is coaxially fixedly connected to the outer circumferential wall of one end of the pipe valve 35 close to the lower tube 34. When the lower surface of the valve plate 23 is in close contact with the upper surface of the screw plate 21, the valve plate 23 is located in the ring formed by all the fastening screws 22. The fastening nut 25 is threadedly connected to the upper end of the fastening screw 22. The fastening nut 25 is pressed against the upper surface of the valve plate 23, so that the valve plate 23 and the screw plate 21 are pressed against each other, so that when the upper tube 36 is rotated and screwed down, the pipe valve 35 is not easily driven to rotate randomly, so that the connection between the pipe valve 35 and the lower tube 34 remains stable.

[0045] Reference Figure 2 The inner water stop ring 2 is coaxially welded on the circumferential outer wall of the lower pipe 34, and the bottom surface of the inner water stop ring 2 is attached to the upper surface of the cushion layer. The pipe valve 35 is located above the inner water stop ring 2 and close to the upper surface of the inner water stop ring 2. The inner water stop ring 2 can be made of a Q235A steel plate with a thickness of at least 6 mm. The outer diameter of the inner water stop ring 2 can be 200 mm. The lower sleeve 3 is coaxially welded on the circumferential outer wall of the inner water stop ring 2. The lower sleeve 3 can be made of a Q235A steel plate with a thickness of at least 6 mm. The bottom end of the lower sleeve 3 is located in the cushion layer and the upper end is located at half the thickness of the bottom plate. The groundwater infiltration needs to infiltrate from between the cushion layer and the outer wall of the lower pipe 34, between the upper surface of the cushion layer and the lower surface of the inner water stop ring 2, and between the lower sleeve 3 and the cushion layer in sequence, which greatly extends the length of the groundwater infiltration path and reduces the possibility of groundwater infiltration.

[0046] Reference Figure 2 The top end face of the lower sleeve 3 is coaxially welded with an upper sleeve 32. The upper sleeve 32 can be made of Q235A steel plate with a thickness of at least 6 mm. The inner diameter of the bottom end of the upper sleeve 32 can be 200 mm and the inner diameter of the upper end can be 150 mm. The upper end face of the upper sleeve 32 is flush with the upper surface of the bottom plate, so that when the groundwater pressure borne by the inner water stop ring 2 is large, the inclined circumferential outer wall of the upper sleeve 32 and the bottom plate can provide a large supporting force, so that the upper sleeve 32 and the lower sleeve 3 are not easy to move up at will. An outer water stop ring 33 is coaxially welded to the circumferential outer wall at the top of the lower sleeve 3. The outer water stop ring 33 can be made of a Q235A steel plate with a thickness of at least 6 mm. The horizontal cross-section of the outer water stop ring 33 is circular and the ring width is at least 100 mm. When the cushion layer is damaged, the groundwater directly seeps up from the outer wall of the lower sleeve 3 and the cushion layer. The outer water stop ring 33 can extend the length of the groundwater infiltration path and reduce the possibility of groundwater infiltration.

[0047] Reference Figure 1Several layers of horizontal steel mesh 38 are installed at the position where the upper sleeve 32 is set on the bottom plate. The steel mesh 38 can be a bidirectional mesh with an arrangement spacing of 100mm and a steel bar diameter of 10mm. The steel mesh 38 and the adjacent bottom plate steel bars are tied together. The steel mesh 38 is penetrated by a mesh hole 27. The steel mesh 38 is welded with a mesh ring 24 at the mesh hole 27. The axis of the mesh ring 24 is consistent with the axis of the upper sleeve 32, so that the mesh ring 24 of each steel mesh 38 can be well fitted to the inclined circumferential outer wall of the upper sleeve 32, so that the position where the upper sleeve 32 is set on the bottom plate is not prone to hollowing, sinking or bulging.

[0048] The implementation principle of a pressure relief and dewatering well in an embodiment of the present application is as follows: groundwater is blocked by an inner water stop ring 2 and an outer water stop ring 33, making it difficult for groundwater to infiltrate upwards, greatly extending the infiltration path of groundwater, minimizing the occurrence of groundwater infiltration, and making it less likely for groundwater to leak from the bottom plate at the corresponding upper sleeve 32 arrangement location, thereby helping to improve the construction quality of the bottom plate.

[0049] The present application also discloses a method for constructing a basement using a pressure relief well, which specifically includes the following steps:

[0050] Step 1: excavate the foundation pit, lay a crushed stone filter layer 31 at a predetermined position, then bury the crushed stone inner tube 26 in the crushed stone filter layer 31, and pour the cushion layer on the bottom of the foundation pit. After the cushion layer is poured and before the concrete solidifies, put the lower pipe 34 into the crushed stone inner tube 26 in the vertical direction, and keep the lower casing 3 in the cushion layer until the cushion layer solidifies;

[0051] Step 2, open the pipe valve 35, connect the upper pipe 36 to the corresponding hose to discharge the groundwater in time, and tie the bottom plate steel bars on the cushion layer, and evenly tie the three-layer steel mesh 38 at the bottom plate steel bars near the upper sleeve 32;

[0052] Step 3: pour the bottom slab concrete until it is flush with the upper end surface of the upper sleeve 32 until the bottom slab concrete solidifies;

[0053] Step 4: When the groundwater is drained to a distance of at least 500 mm between the highest liquid level and the bottom surface of the cushion layer, the upper pipe 36 is connected to the concrete delivery pump to perform pressure grouting on the gravel cushion layer 31. After the grouting is completed, the pipe valve 35 is closed, and then the upper pipe 36 is screwed down, and the pipe valve 35 is blocked with a plug. Observe for 24 hours to ensure that there is no water seepage at the inner water stop ring 2 and the pipe valve 35;

[0054] Step 5, clean the upper surface of the inner water stop ring 2, then grout into the upper sleeve 32, the injected concrete is a compensating shrinkage waterproof concrete with a strength grade higher than the bottom plate concrete, and vibrate and compact it, then before the initial setting of the concrete, roll the concrete for a second time, and then cover it with a plastic film for curing, and the curing time is at least 14 days;

[0055] Step 6. After the base slab is poured, the basement wall columns, basement side walls and basement top slab will be poured in sequence. After acceptance, waterproofing work will be carried out and finally backfilling will be carried out.

[0056] The implementation principle of a method for using a pressure relief well to construct a basement in an embodiment of the present application is as follows: the groundwater is blocked by the inner water stop ring 2 and the outer water stop ring 33, making it difficult for the groundwater to infiltrate, greatly extending the infiltration path of the groundwater, minimizing the occurrence of groundwater infiltration, and making it less likely for groundwater to leak from the bottom plate at the corresponding upper sleeve 32 arrangement location, which helps to improve the construction quality of the bottom plate.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure relief well, comprising a diversion pipe (1) for pumping away groundwater, characterized in that: The guide tube (1) is sealed and fixedly connected to an inner water stop ring (2) on its circumferential outer wall, and the inner water stop ring (2) is sealed and fixedly connected to a lower sleeve (3) on its outer wall, the bottom end of the lower sleeve (3) is located in the cushion layer, and the bottom surface of the inner water stop ring (2) is in contact with the upper surface of the cushion layer; An upper sleeve (32) is provided at the upper end of the lower sleeve (3); the outer diameter of the end of the upper sleeve (32) away from the lower sleeve (3) is smaller than the outer diameter of the end of the upper sleeve (32) close to the lower sleeve (3); and the end of the upper sleeve (32) away from the lower sleeve (3) is flush with the upper surface of the bottom plate; The upper sleeve (32) is inserted with several layers of steel mesh (38), each layer of steel mesh (38) is penetrated by a mesh hole (27), a mesh ring (24) is provided at the mesh hole (27), the upper sleeve (32) is tightly fitted to the inner wall of the mesh ring (24), and the steel mesh (38) is tied to the bottom plate steel bars.

2. A pressure relief well according to claim 1, characterized in that: The bottom end of the guide pipe (1) is flush with the bottom surface of the cushion layer. A gravel filter layer (31) is provided at the bottom end of the guide pipe (1). The closer the gravel filter layer (31) is to the inner water stop ring (2), the larger the particle size is. The gravel filter layer (31) is provided with a gravel inner tube (26) for the guide pipe (1) to be inserted. The upper end surface of the gravel inner tube (26) is flush with the upper surface of the cushion layer. A filter screen cover (37) is provided at the bottom end of the guide pipe (1) to prevent the gravel filter layer (31) from entering the guide pipe (1).

3. A pressure relief well according to claim 1, characterized in that: An outer water stop ring (33) is sealingly and fixedly connected to the outer wall of one end of the lower sleeve (3) close to the upper sleeve (32).

4. A pressure relief well according to claim 1, characterized in that: The flow guide pipe (1) comprises a lower pipe (34) sealedly connected to the inner water stop ring (2), a pipe valve (35) threadedly connected to the lower pipe (34), and an upper pipe (36) threadedly connected to an end of the pipe valve (35) away from the lower pipe (34). The pipe valve (35) can control the communication between the upper pipe (36) and the lower pipe (34).

5. A pressure relief well according to claim 4, characterized in that: The lower tube (34) is provided with a screw plate (21) at one end close to the tube valve (35), the screw plate (21) is provided with a fastening screw (22) around the axis of the lower tube (34), the tube valve (35) is provided with a valve plate (23) fitted to the screw plate (21), and the fastening screw (22) is threadedly connected to a fastening nut (25) for forcing the valve plate (23) to be pressed against the screw plate (21).

6. A method for basement construction using a pressure relief well, characterized in that: The specific steps include: Step 1, excavating a foundation pit, laying a crushed stone filter layer (31) at a predetermined position, then burying a crushed stone inner tube (26) in the crushed stone filter layer (31), pouring a cushion layer on the bottom surface of the foundation pit, after the cushion layer is poured and before the concrete solidifies, placing a lower tube (34) into the crushed stone inner tube (26) in a vertical direction, and keeping the lower sleeve (3) in the cushion layer until the cushion layer solidifies; Step 2, open the pipe valve (35), connect the upper pipe (36) to the corresponding hose to discharge the groundwater in time, and tie the bottom plate steel bars on the cushion layer; Step 3, pouring the bottom plate concrete until it is flush with the upper end surface of the upper sleeve (32) until the bottom plate concrete solidifies; Step 4: connect the upper pipe (36) to the concrete delivery pump to perform pressure grouting on the gravel cushion layer (31). After the grouting is completed, close the pipe valve (35), then screw down the upper pipe (36), and seal the pipe valve (35) with a plug. Observe and ensure that there is no water seepage at the inner water stop ring (2) and the pipe valve (35); Step 5: Clean the upper surface of the inner water stop ring (2), then inject grout into the upper sleeve (32), vibrate and compact it, and then cover it with a plastic film for curing; Step 6. After the base slab is poured, the basement wall columns, basement side walls and basement top slab will be poured in sequence. After acceptance, waterproofing work will be carried out and finally backfilling will be carried out.

7. A method for basement construction using a pressure relief well according to claim 6, characterized in that: In step 2, three layers of steel mesh (38) are evenly tied at the bottom plate steel bars near the upper sleeve (32).

8. The method for constructing a basement using a pressure relief well according to claim 6, characterized in that: In step 5, after the concrete is initially vibrated and compacted and before the concrete initially sets, the concrete is compacted for a second time and then covered with a plastic film.

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