A BIM-based integrated assembly pipe shaft and a construction method thereof

Abstract

The application provides a BIM-based integrated assembly pipe well and a construction method thereof, which comprises a vertical well wall, a low floor, a low positioning mechanism, a high floor, a high positioning mechanism, a low pipe fitting and a high pipe fitting. The low pipe fitting is arranged on the low positioning mechanism, the high pipe fitting is arranged on the high positioning mechanism, the low pipe fitting and the high pipe fitting are connected at the end close to each other, the high positioning mechanism and the low positioning mechanism are matched, the low pipe fitting and the high pipe fitting are arranged along the direction perpendicular to the low floor and the high floor after being connected, the pipe sleeve does not need to be embedded layer by layer from bottom to top, there are many reference systems during embedding, the influence of the construction precision of the main body structure is small, the influence of the cumulative error is reduced, the steel bars do not need to be cut layer by layer during the installation of the pipe sleeve, the pipe well floor does not need to be poured layer by layer, manpower and material resources are saved, the method has the advantages of convenient operation, improved construction precision of the pipe well, and low implementation cost.

Description

Technical Field

[0001] This application belongs to the field of pipeline construction technology, specifically relating to a BIM-based integrated prefabricated pipeline well and its construction method. Background Technology

[0002] In the existing technology, during the construction of pipe wells, the common methods are to pre-embed the pipes during the first-time structural construction, install the vertical pipe fittings after the structural construction is completed, or install the pipes and pipe sleeves after the main structure is completed, and then pour the pipe well floor slab a second time.

[0003] Both of the above methods have certain drawbacks. When using the single-stage structural construction pre-embedding method, the pipe sleeves are pre-embedded layer by layer from bottom to top. During pre-embedding, the structural columns and beams of the current floor can only be used as construction benchmarks. The alignment of the centers of the pipe sleeves between upper and lower layers depends on the accuracy of the main structure construction. If there are errors in the main structure or the positions of the pre-embedded pipes are not uniform, it will greatly affect the quality and progress of the vertical pipe installation. The traditional construction method of secondary pouring for vertical pipe installation can use the top floor as a benchmark to hang a plumb line, and the verticality of the vertical pipe and the centering of the pipe sleeve can be guaranteed. However, the pipe sleeve installation requires the cutting of steel bars layer by layer, the pouring of the pipe shaft floor slab layer by layer, and the secondary formwork erection and dismantling of each floor slab, as well as the transportation of concrete layer by layer. The workload is large and the construction period is long. Therefore, there is an urgent need to make improvements. Summary of the Invention

[0004] This application addresses the technical problems in existing technologies, such as the one-time pre-embedding method used in the construction of pipe shafts, where pipe sleeves are pre-embedded layer by layer from bottom to top. During pre-embedding, only the structural columns and beams of the current floor can be used as construction benchmarks, and the alignment of the pipe sleeve centers between upper and lower layers depends on the accuracy of the main structure construction. Errors in the main structure or inconsistencies in the position of the pre-embedded pipes can significantly impact the quality and progress of vertical pipe installation. Furthermore, the traditional two-stage pouring method for vertical pipe installation requires layer-by-layer cutting of reinforcing steel during pipe sleeve installation, layer-by-layer pouring of the pipe shaft floor slab, and secondary formwork erection and dismantling for each floor slab, as well as layer-by-layer concrete transportation, resulting in a large workload and long construction period. This application proposes a BIM-based integrated prefabricated pipe shaft and its construction method.

[0005] This application adopts the following solution: a BIM-based integrated prefabricated pipe shaft, including a pipe shaft wall arranged vertically, a low-level floor slab arranged horizontally between two pipe shaft walls, a low-level positioning mechanism on the low-level floor slab, a high-level floor slab arranged above and parallel to the low-level floor slab, a high-level positioning mechanism on the high-level floor slab, a low-level pipe fitting on the low-level positioning mechanism, and a high-level pipe fitting on the high-level positioning mechanism and connected to the end of the low-level pipe fitting near the high-level floor slab. The low-level positioning mechanism and the high-level positioning mechanism are used to connect the low-level pipe fitting and the high-level pipe fitting and arrange them in a direction perpendicular to the low-level floor slab.

[0006] Preferably, the low-positioning mechanism includes a low-positioning hole provided on the low-positioning floor slab, and a low-positioning tube sleeve provided on the low-positioning floor slab and located at the position corresponding to the low-positioning hole. When the low-positioning tube is inserted through the low-positioning hole, the low-positioning tube sleeve is placed on the low-positioning floor slab and can be sleeved on the low-positioning tube.

[0007] Preferably, the high-positioning mechanism includes a high-positioning hole on the high-positioning floor slab and a high-positioning tube sleeve disposed on the high-positioning floor slab and located at the position corresponding to the high-positioning hole. When the high-positioning tube is inserted through the high-positioning hole, the high-positioning tube sleeve is disposed on the high-positioning floor slab and can be sleeved on the low-positioning tube. The end of the high-positioning tube near the low-positioning floor slab is connected to the end of the low-positioning tube near the high-positioning floor slab.

[0008] Preferably, the high-position positioning hole includes an inner positioning hole provided on the high-position floor slab and an outer positioning hole provided on the inner positioning hole, wherein the diameter of the outer positioning hole is larger than the diameter of the inner positioning hole.

[0009] Preferably, an adjustable floor is provided between the elevated floor slab and the elevated positioning sleeve. The adjustable floor slab has an adjustment groove, and the adjustment groove has an installation hole. When the elevated pipe is inserted into the elevated positioning hole, the elevated pipe passes through the installation hole, and the elevated positioning sleeve is fitted onto the elevated pipe and matched within the adjustment groove. There is a gap between the elevated positioning sleeve and the adjustment groove, and the elevated positioning sleeve can be offset relative to the adjustment groove.

[0010] Preferably, a positioning bracket is provided between the elevated pipe fitting and the pipe well wall. One end of the positioning bracket is provided on the elevated pipe fitting, and the other end is perpendicular to the pipe well wall. The positioning bracket is used to set the elevated pipe fitting in a direction parallel to the pipe well wall.

[0011] Preferably, a laser emitter is detachably provided at the center of the cross-section of the lower pipe fitting, and a laser receiver is detachably provided at the center of the cross-section of the higher pipe fitting. The laser receiver is used to receive the laser emitted by the laser generator.

[0012] Preferably, the height H of the upper end face of the high-level pipe fitting from the high-level floor slab and the height h of the upper end face of the high-level positioning pipe sleeve from the high-level floor slab satisfy the following relationship: 20cm≤Hh≤30cm.

[0013] To address the technical problems raised in this application, this application also adopts the following solution: a construction method for an integrated prefabricated pipe well based on BIM, comprising the following steps:

[0014] Step 101. Simulate the construction of the building manhole riser based on BIM to determine the distribution of vertical walls, high-level floor slabs, high-level pipe fittings, low-level floor slabs, high-level positioning mechanisms, low-level positioning mechanisms, and low-level pipe fittings in the manhole.

[0015] Step 102. Based on the drawings obtained from the BIM simulation in Step 101, pre-set high-level positioning holes and low-level positioning holes on the high-level floor slab and the low-level floor slab.

[0016] Step 103. Insert the low-position pipe fitting into the low-position positioning hole, and then put the low-position positioning mechanism on the low-position pipe fitting. After connecting the high-position pipe fitting to the low-position pipe fitting and extending it into the high-position positioning hole, put the high-position positioning mechanism on the high-position pipe fitting.

[0017] Step 104. Adjust the high-position positioning mechanism so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line, and then fix it with concrete.

[0018] Preferably, step 103 includes the following steps:

[0019] Step 201. Set the adjustable floor slabs on the high floor slab and the low floor slab respectively. Set the positioning brackets parallel to the high floor slab on the high floor slab. Use a plumb line to hang the positioning brackets on the high floor slab at the corresponding positions. Determine the position of the positioning brackets on the low floor slab and the height of the upper end face of the low pipe fitting.

[0020] Step 202. After placing the positioning bracket on the low floor slab at the position determined in step 201, insert the low-position pipe fitting into the low-position positioning hole, then put the low-position positioning tube sleeve on the low-position pipe fitting and put the low-position positioning tube into the adjustment groove on the adjustable floor slab, so that the upper end face of the low-position pipe fitting is at the height position determined in step 201 and is set perpendicular to the direction of the low floor slab. After setting, use pipe clamps for initial fixation.

[0021] Step 203. After connecting the high-level pipe fitting to the upper end face of the low-level pipe fitting and inserting it into the high-level positioning hole on the high-level floor slab, put the high-level positioning pipe sleeve on the high-level pipe fitting and put the high-level positioning pipe sleeve into the adjustment groove on the adjustable floor slab, and use pipe clamps for initial fixation.

[0022] Step 204. Based on the setting of the low-position pipe fitting vertically to the low-position floor slab in step 202, drive the high-position positioning pipe sleeve to offset relative to the adjustment groove, so as to drive the high-position pipe fitting to offset relative to the low-position pipe fitting, so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line, and then fix it with concrete to fill the gap.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] This application provides a BIM-based integrated prefabricated pipe shaft and its construction method, including a vertical shaft wall, a low-level floor slab, a low-level positioning mechanism, a high-level floor slab, a high-level positioning mechanism, low-level pipe fittings, and high-level pipe fittings. By placing the low-level pipe fittings on the low-level positioning mechanism and the high-level pipe fittings on the high-level positioning mechanism, and then connecting the near ends of the low-level and high-level pipe fittings, the low-level and high-level pipe fittings are connected and set in a direction perpendicular to both the low-level and high-level floor slabs through the cooperation of the high-level and low-level positioning mechanisms. This eliminates the need for pre-embedding the pipe sleeves layer by layer from bottom to top, provides multiple reference points during pre-embedding, reduces the impact of the main structure's construction accuracy, and minimizes the cumulative error. It also eliminates the need for layer-by-layer cutting of reinforcing bars and layer-by-layer pouring of the pipe shaft floor slab during pipe sleeve installation, saving manpower and resources. It has the advantages of easy operation, improved pipe shaft construction accuracy, and low implementation cost. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0026] Figure 1 This is a structural schematic diagram of an integrated prefabricated pipe well based on BIM, as described in this application.

[0027] Figure 2 This is a side view of an integrated prefabricated pipe well based on BIM, as described in this application.

[0028] Figure 3 This is a side view of the high / low floor slab after it is connected to the pipe shaft wall in this application;

[0029] Figure 4 This is an exploded structural diagram of the high-position positioning sleeve / low-position positioning sleeve and the adjustable floor slab in this application;

[0030] Figure 5 This is a schematic diagram of the assembled structure of the high-position positioning sleeve / low-position positioning sleeve and the adjusting floor slab of this application;

[0031] Figure 6 This is a top view of the high-position positioning sleeve / low-position positioning sleeve of this application;

[0032] Figure 7 This is a side view of the high-position positioning sleeve / low-position positioning sleeve of this application;

[0033] Figure 8 This is a top view of the floor slab that this application adjusts. Detailed Implementation

[0034] Combination such as Figure 1-8 As shown, to further illustrate this technical solution, a BIM-based integrated prefabricated pipe shaft includes a pipe shaft wall X arranged vertically, a low-level floor slab 1 arranged horizontally between two pipe shaft walls X, a low-level positioning mechanism 2 arranged on the low-level floor slab 1, a high-level floor slab 3 arranged above the low-level floor slab 1 and parallel to the low-level floor slab 1, a high-level positioning mechanism 4 arranged on the high-level floor slab 3, a low-level pipe fitting 5 arranged on the low-level positioning mechanism 2, and a high-level pipe fitting 6 arranged on the high-level positioning mechanism 4 and connected to the low-level pipe fitting 5 near the high-level floor slab 3. The low-level positioning mechanism 2 and the high-level positioning mechanism 4 are used to connect the low-level pipe fitting 5 and the high-level pipe fitting 6 and arrange them in a direction perpendicular to the low-level floor slab 1.

[0035] This application provides a BIM-based integrated prefabricated pipe shaft and its construction method, including a vertical shaft wall, a low-level floor slab, a low-level positioning mechanism, a high-level floor slab, a high-level positioning mechanism, low-level pipe fittings, and high-level pipe fittings. By placing the low-level pipe fittings on the low-level positioning mechanism and the high-level pipe fittings on the high-level positioning mechanism, and then connecting the near ends of the low-level and high-level pipe fittings, the low-level and high-level pipe fittings are connected and set in a direction perpendicular to both the low-level and high-level floor slabs through the cooperation of the high-level and low-level positioning mechanisms. This eliminates the need for pre-embedding the pipe sleeves layer by layer from bottom to top, provides multiple reference points during pre-embedding, reduces the impact of the main structure's construction accuracy, and minimizes the cumulative error. It also eliminates the need for layer-by-layer cutting of reinforcing bars and layer-by-layer pouring of the pipe shaft floor slab during pipe sleeve installation, saving manpower and resources. It has the advantages of easy operation, improved pipe shaft construction accuracy, and low implementation cost.

[0036] Preferably, the low-positioning mechanism 2 includes a low-positioning hole 20 provided on the low-positioning floor slab 1, and a low-positioning sleeve 21 provided on the low-positioning floor slab 1 and located at the position corresponding to the low-positioning hole 20. When the low-positioning pipe 5 passes through the low-positioning hole 20, the low-positioning sleeve 21 is provided on the low-positioning floor slab 1 and can be sleeved on the low-positioning pipe 5.

[0037] Preferably, the high-positioning mechanism 4 includes a high-positioning hole 40 on the high-positioning floor slab 3 and a high-positioning sleeve 41 located on the high-positioning floor slab 3 at a position corresponding to the high-positioning hole 40. When the high-positioning pipe 6 passes through the high-positioning hole 40, the high-positioning sleeve 41 is located on the high-positioning floor slab 3 and can be sleeved on the low-positioning pipe 5. The end of the high-positioning pipe 6 near the low-positioning floor slab 1 is connected to the end of the low-positioning pipe 5 near the high-positioning floor slab 3.

[0038] In actual implementation, after the manhole construction is completed and the top is sealed, construction proceeds from the bottom of the manhole to the top cover. During the BIM simulation, the levelness and verticality of the low-level floor slab, the high-level floor slab, and the manhole wall are determined. The levelness of the low-level floor slab and the verticality of the manhole wall are used as benchmarks to offset cumulative errors.

[0039] In actual implementation, using L-shaped positioning hole mold A, high-level positioning holes and low-level positioning holes are reserved on the high-level floor slab and the low-level floor slab respectively. After the main structure of the pipe well is completed, the L-shaped positioning hole mold is demolded, and positioning holes can be set on the high-level positioning plate and the low-level positioning plate.

[0040] In actual implementation, the high-level floor slab and the low-level floor slab have the same structure. Only the low-level floor slab needs to be prepared and a low-level positioning hole needs to be reserved on the low-level floor slab. This will complete the preparation of the high-level floor slab and the high-level positioning hole, thereby reducing the number of errors caused by cutting the floor slab multiple times and setting the positioning hole.

[0041] Preferably, the high-positioning hole 40 includes a positioning inner hole 400 provided on the high-positioning floor slab 3, and a positioning outer hole 401 provided on the positioning inner hole 400, wherein the diameter of the positioning outer hole 401 is larger than the diameter of the positioning inner hole 400.

[0042] In actual implementation, the high-position positioning hole / low-position positioning hole includes a positioning inner hole and a positioning outer hole, which allows the low-position pipe fitting to be offset relative to the hole wall when it is inserted into it, so as to adjust the verticality of the low-position pipe fitting.

[0043] Preferably, an adjustable floor 7 is provided between the elevated floor slab 3 and the elevated positioning sleeve 41. The adjustable floor slab 7 is provided with an adjustment groove 70 and an installation hole 71. When the elevated pipe 6 is inserted into the elevated positioning hole 40, the elevated pipe 6 passes through the installation hole 71. The elevated positioning sleeve 41 is fitted onto the elevated pipe 6 and matched within the adjustment groove 70. There is a gap between the elevated positioning sleeve 41 and the adjustment groove 70, and the elevated positioning sleeve 41 can be offset relative to the adjustment groove 70.

[0044] In actual implementation, a gap of 6-8cm is left between the adjustable floor slab and the adjustment groove along the length direction, and a gap of 8-10cm is left between the adjustable floor slab and the adjustment groove along the width direction, in order to limit the degree of offset of the adjustable floor slab relative to the adjustment groove and prevent excessive adjustment error.

[0045] Preferably, a positioning bracket 60 is provided between the high-level pipe fitting 6 and the pipe well wall X. One end of the positioning bracket 60 is provided on the high-level pipe fitting 6, and the other end is perpendicular to the pipe well wall X. The positioning bracket 60 is used to set the high-level pipe fitting 6 in a direction parallel to the pipe well wall X.

[0046] Preferably, a laser emitter is detachably provided at the center of the cross-section of the lower pipe fitting 5, and a laser receiver is detachably provided at the center of the cross-section of the higher pipe fitting 6. The laser receiver is used to receive the laser emitted by the laser generator.

[0047] In actual implementation, after the low-position pipe fitting is placed in the low-position positioning hole, the low-position pipe fitting is set along the direction perpendicular to the low-position floor slab in conjunction with the positioning bracket and the low-position positioning sleeve. After the low-position pipe fitting is initially fixed, the high-position pipe fitting is placed on the upper end surface of the low-position pipe fitting. During the installation process, the laser receiver is connected to the laser emitted by the laser transmitter throughout the process. A positioning bracket perpendicular to the pipe well wall and attached to it can be set on the high-position pipe fitting to assist in the installation.

[0048] Preferably, the height H of the upper end face of the high-level pipe fitting 6 from the high-level floor slab 3 and the height h of the upper end face of the high-level positioning pipe sleeve 41 from the high-level floor slab 3 satisfy the following relationship: 20cm≤Hh≤30cm, so as to facilitate the installation of the high-level pipe fitting on the low-level pipe fitting.

[0049] A construction method for an integrated prefabricated pipe well based on BIM includes the following steps:

[0050] Step 101. Simulate the construction of the building manhole riser based on BIM to determine the distribution of vertical walls, high-level floor slabs, high-level pipe fittings, low-level floor slabs, high-level positioning mechanisms, low-level positioning mechanisms, and low-level pipe fittings in the manhole.

[0051] The high-level pipe fittings and low-level pipe fittings have the same structure, the high-level floor slabs and low-level floor slabs have the same structure, and the low-level positioning mechanism and the high-level positioning mechanism have the same structure. Only the corresponding mechanism of the low-level floor slab needs to be completed before the corresponding mechanism of the high-level floor slab can be completed.

[0052] The high-positioning casing / low-positioning casing obtained from BIM simulation are divided into standard parts and non-standard customized parts, which can meet the needs of pipeline wells with different structures.

[0053] Step 102. Based on the drawings obtained from the BIM simulation in Step 101, use L-shaped positioning hole mold A to pre-set high-level positioning holes and low-level positioning holes on the high-level floor slab and the low-level floor slab.

[0054] Step 103. Insert the low-position pipe fitting into the low-position positioning hole, and then put the low-position positioning mechanism on the low-position pipe fitting. After connecting the high-position pipe fitting to the low-position pipe fitting and extending it into the high-position positioning hole, put the high-position positioning mechanism on the high-position pipe fitting.

[0055] Step 104. Adjust the high-position positioning mechanism so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line, and then fix it with concrete.

[0056] Preferably, step 103 includes the following steps:

[0057] Step 201. Install the adjustable floor slab on the high floor slab and the low floor slab respectively. Set up a positioning bracket on the high floor slab that is parallel to the high floor slab and fits against the wall of the pipe shaft. Use a plumb line to hang the positioning bracket on the high floor slab at the corresponding position. Use the plumb line to indicate the position to determine the position of the positioning bracket on the low floor slab and the height of the upper end of the low pipe fitting.

[0058] Step 202. After placing the positioning bracket on the low floor slab at the position determined in step 201, insert the low-position pipe fitting into the low-position positioning hole, then put the low-position positioning tube sleeve on the low-position pipe fitting and put the low-position positioning tube into the adjustment groove on the adjustable floor slab, so that the upper end face of the low-position pipe fitting is at the height position determined in step 201 and is set perpendicular to the direction of the low floor slab by the positioning bracket. After the setting is completed, use pipe clamps for initial fixation.

[0059] Step 203. After connecting the high-level pipe fitting to the upper end face of the low-level pipe fitting and inserting it into the high-level positioning hole on the high-level floor slab, put the high-level positioning pipe sleeve on the high-level pipe fitting and put the high-level positioning pipe sleeve into the adjustment groove on the adjustable floor slab, and use pipe clamps for initial fixation.

[0060] Step 204. Based on the vertical setting of the low-position pipe fitting in step 202, drive the high-position positioning pipe sleeve to offset relative to the adjustment groove, so as to offset the high-position pipe fitting relative to the low-position pipe fitting, so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line. After the laser receiver on the high-position pipe fitting receives the laser emitted by the laser generator on the low-position pipe fitting, it is fixed by filling the gap with concrete.

[0061] This application provides a BIM-based integrated prefabricated pipe shaft and its construction method, including a vertical shaft wall, a low-level floor slab, a low-level positioning mechanism, a high-level floor slab, a high-level positioning mechanism, low-level pipe fittings, and high-level pipe fittings. By placing the low-level pipe fittings on the low-level positioning mechanism and the high-level pipe fittings on the high-level positioning mechanism, and then connecting the near ends of the low-level and high-level pipe fittings, the low-level and high-level pipe fittings are connected and set in a direction perpendicular to both the low-level and high-level floor slabs through the cooperation of the high-level and low-level positioning mechanisms. This eliminates the need for pre-embedding the pipe sleeves layer by layer from bottom to top, provides multiple reference points during pre-embedding, reduces the impact of the main structure's construction accuracy, and minimizes the cumulative error. It also eliminates the need for layer-by-layer cutting of reinforcing bars and layer-by-layer pouring of the pipe shaft floor slab during pipe sleeve installation, saving manpower and resources. It has the advantages of easy operation, improved pipe shaft construction accuracy, and low implementation cost.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A BIM-based integrated prefabricated pipe well, characterized in that, The system includes a vertically arranged pipe well wall, a low floor slab (1) located between two pipe well walls and arranged horizontally, a low-positioning mechanism (2) located on the low floor slab (1), a high floor slab (3) located above the low floor slab (1) and parallel to the low floor slab (1), a high-positioning mechanism (4) located on the high floor slab (3), a low-positioning pipe fitting (5) located on the low-positioning mechanism (2), and a high-positioning pipe fitting (6) located on the high-positioning mechanism (4) and connected to the low-positioning pipe fitting (5) near the end of the high floor slab (3). The low-positioning mechanism (2) and the high-positioning mechanism (4) are used to connect the low-positioning pipe fitting (5) and the high-positioning pipe fitting (6) and then arrange them in a direction perpendicular to the low floor slab (1). The low-positioning mechanism (2) includes a low-positioning hole (20) provided on the low-positioning floor slab (1) and a low-positioning sleeve (21) provided on the low-positioning floor slab (1) and located at the position corresponding to the low-positioning hole (20). When the low-positioning pipe (5) passes through the low-positioning hole (20), the low-positioning sleeve (21) is provided on the low-positioning floor slab (1) and can be sleeved on the low-positioning pipe (5). The high-positioning mechanism (4) includes a high-positioning hole (40) on the high-positioning floor slab (3) and a high-positioning sleeve (41) located on the high-positioning floor slab (3) at the position corresponding to the high-positioning hole (40). When the high-positioning pipe (6) passes through the high-positioning hole (40), the high-positioning sleeve (41) is located on the high-positioning floor slab (3) and can be sleeved on the high-positioning pipe (6). The end of the high-positioning pipe (6) near the low-positioning floor slab (1) is connected to the end of the low-positioning pipe (5) near the high-positioning floor slab (3). An adjustable floor slab (7) is provided between the high-level floor slab (3) and the high-level positioning sleeve (41). The adjustable floor slab (7) is provided with an adjustment groove (70) and an installation hole (71) is provided on the adjustment groove (70). When the high-level pipe fitting (6) is inserted into the high-level positioning hole (40), the high-level pipe fitting (6) passes through the installation hole (71). The high-level positioning sleeve (41) is fitted onto the high-level pipe fitting (6) and matched in the adjustment groove (70). There is a gap between the high-level positioning sleeve (41) and the adjustment groove (70). The high-level positioning sleeve (41) can be offset relative to the adjustment groove (70).

2. The BIM-based integrated prefabricated pipe well according to claim 1, characterized in that, The high-positioning hole (40) includes a positioning inner hole (400) provided on the high-positioning floor slab (3) and a positioning outer hole (401) provided on the positioning inner hole (400), wherein the diameter of the positioning outer hole (401) is larger than the diameter of the positioning inner hole (400).

3. The BIM-based integrated prefabricated pipe well according to claim 1, characterized in that, A positioning bracket (60) is provided between the high-level pipe fitting (6) and the pipe well wall. One end of the positioning bracket (60) is located on the high-level pipe fitting (6), and the other end is perpendicular to the pipe well wall. The positioning bracket (60) is used to set the high-level pipe fitting (6) in a direction parallel to the pipe well wall.

4. The BIM-based integrated prefabricated pipe well according to claim 1, characterized in that, A laser emitter is detachably provided at the center of the cross-section of the low-position pipe fitting (5), and a laser receiver is detachably provided at the center of the cross-section of the high-position pipe fitting (6). The laser receiver is used to receive the laser emitted by the laser emitter.

5. The BIM-based integrated prefabricated pipe well according to claim 1, characterized in that, The height H of the upper end face of the high-level pipe fitting (6) from the high-level floor slab (3) and the height h of the upper end face of the high-level positioning pipe sleeve (41) from the high-level floor slab (3) satisfy the following relationship: 20cm≤Hh≤30cm.

6. A construction method for the BIM-based integrated prefabricated pipe well as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step 101. Simulate the construction of the building manhole riser based on BIM to determine the distribution of vertical walls, high-level floor slabs, high-level pipe fittings, low-level floor slabs, high-level positioning mechanisms, low-level positioning mechanisms, and low-level pipe fittings in the manhole. Step 102. Based on the drawings obtained from the BIM simulation in Step 101, pre-set high-level positioning holes and low-level positioning holes on the high-level floor slab and the low-level floor slab. Step 103. Insert the low-position pipe fitting into the low-position positioning hole, and then put the low-position positioning mechanism on the low-position pipe fitting. After connecting the high-position pipe fitting to the low-position pipe fitting and extending it into the high-position positioning hole, put the high-position positioning mechanism on the high-position pipe fitting. Step 104. Adjust the high-position positioning mechanism so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line, and then fix it with concrete.

7. A construction method for a BIM-based integrated prefabricated pipe well according to claim 6, characterized in that, Step 103 includes the following steps: Step 201. Set the adjustable floor slabs on the high floor slab and the low floor slab respectively. Set the positioning brackets parallel to the high floor slab on the high floor slab. Use a plumb line to hang the positioning brackets on the high floor slab at the corresponding positions. Determine the position of the positioning brackets on the low floor slab and the height of the upper end face of the low pipe fitting. Step 202. After placing the positioning bracket on the low floor slab at the position determined in step 201, insert the low-position pipe fitting into the low-position positioning hole, then put the low-position positioning tube sleeve on the low-position pipe fitting and put the low-position positioning tube into the adjustment groove on the adjustable floor slab, so that the upper end face of the low-position pipe fitting is at the height position determined in step 201 and is set perpendicular to the direction of the low floor slab. After setting, use pipe clamps for initial fixation. Step 203. After connecting the high-level pipe fitting to the upper end face of the low-level pipe fitting and inserting it into the high-level positioning hole on the high-level floor slab, put the high-level positioning pipe sleeve on the high-level pipe fitting and put the high-level positioning pipe sleeve into the adjustment groove on the adjustable floor slab, and use pipe clamps for initial fixation. Step 204. Based on the setting of the low-position pipe fitting vertically to the low-position floor slab in step 202, drive the high-position positioning pipe sleeve to offset relative to the adjustment groove, so as to drive the high-position pipe fitting to offset relative to the low-position pipe fitting, so that the center of the cross-section of the high-position pipe fitting and the center of the cross-section of the low-position pipe fitting are on the same straight line, and then fix it with concrete to fill the gap.

Images