Construction method facilitating high-precision installation of drainage pipeline and one-time pouring of foundation

Abstract

The invention relates to the technical field of drainage pipeline construction, in particular to a construction method facilitating high-precision installation of a drainage pipeline and one-time pouring of a foundation, and the construction method comprises the following steps: S1, prefabricating a pipe pillow; s2, height measurement and adjustment adaptation; s3, fixing the pipe pillow; s4, pipe joints are installed; and S5, primary pouring of the foundation. According to the construction method facilitating high-precision installation of the drainage pipeline and one-time pouring of the foundation, an arc-shaped structure of a customized prefabricated concrete special-shaped pipe pillow is precisely matched with the curvature of the outer wall of a pipe joint, interference fit between a positioning steel bar and a pipe pillow positioning hole is achieved, and the fixing mode that the positioning steel bar is inserted into a base gravel layer by not smaller than 300 mm is adopted; and the risks of horizontal displacement and vertical settlement after the pipe joint is installed are completely eradicated. Through modularized padding of the elevation adjusting steel plate, the elevation deviation of the base can be flexibly compensated, and repeated leveling or cushion thickness adjustment is not needed.

Description

Technical Field

[0001] This invention relates to the field of drainage pipeline construction technology, and more specifically, to a construction method that facilitates high-precision installation of drainage pipelines and allows for one-time foundation pouring. Background Technology

[0002] As a core component of urban infrastructure, the construction quality of drainage pipelines directly determines the operational efficiency and durability of urban drainage systems. This is especially true for gravity flow drainage pipelines, where the elevation accuracy of pipe section installation and the integrity of the foundation structure are crucial factors in ensuring smooth drainage and preventing subsequent leakage and settlement. Currently, the open-cut method remains the mainstream construction technique for small and medium-sized drainage pipelines. Its pipe foundation construction and pipe installation typically follow the traditional process of "leveling the foundation first, then installing the pipe, and finally pouring the pipe base." However, this approach has gradually revealed numerous technical bottlenecks in practical applications.

[0003] In terms of pipeline installation accuracy control, traditional methods rely on leveling the trench base, laying a layer of crushed stone or mortar, and then adjusting the elevation and axis of the pipe sections using temporary supports such as wedges and wooden wedges. However, the underground construction environment is complex, and the elevation of the compacted crushed stone base is prone to local deviations. The stability of the temporary supports is poor, and slippage or settlement can easily occur during the hoisting and subsequent pouring of pipe sections, leading to deviations in the pipe section axis and excessive elevation deviations. Since the drainage capacity of drainage pipelines depends entirely on the design slope, such deviations often cause pipe siltation, poor drainage, and even stress concentration and damage to the pipeline structure. At the same time, the elevation adjustment process requires repeated measurements and adjustments, which not only consumes a lot of manpower but also seriously affects construction efficiency.

[0004] Regarding the construction quality of the foundation structure, the traditional staged pouring process inevitably creates construction joints between the foundation and the pipe base. If the concrete interface at these joints is not properly treated, it can easily become a leak-prone area. Groundwater seepage can erode the foundation structure, leading to a decrease in the pipe foundation's bearing capacity and subsequently causing uneven settlement of the pipeline. Furthermore, staged pouring requires two rounds of formwork erection, removal, and curing, extending the construction period. Multiple process transitions can also lead to the accumulation of construction errors, making it difficult to guarantee the integrity and dimensional accuracy of the foundation structure.

[0005] To address these issues, the industry has attempted to use precast pipe sleepers for positioning. However, existing pipe sleepers are mostly standardized, generic products with poor curvature compatibility with pipe sections and lack flexible elevation adjustment capabilities, making them unable to handle dynamic deviations in the foundation elevation. Some construction schemes adjust the elevation by increasing the thickness of the subbase, but this not only increases material consumption but may also exacerbate later settlement due to insufficient subbase compaction. Furthermore, the existing pipe sleepers have poor bonding with the foundation concrete, making it difficult to form a cohesive structural system that can withstand groundwater and soil pressure, leading to stress dissociation. Summary of the Invention

[0006] The purpose of this invention is to provide a construction method that facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, thereby addressing the problem that traditional multi-stage casting processes inevitably create construction joints between the foundation and the pipe base. Improper treatment of the concrete interface at these construction joints can easily lead to leakage problems. Groundwater infiltration can erode the foundation structure, reducing the pipe foundation's bearing capacity and causing uneven pipe settlement.

[0007] To achieve the above objectives, the present invention provides a construction method that facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, comprising the following steps: S1. Precast pipe sleeper: Based on the diameter of the drainage pipe section to be installed, precast concrete irregular-shaped pipe sleepers are made to ensure that the upper arc of the precast concrete irregular-shaped pipe sleeper fits tightly with the outer wall of the pipe section, and that the concrete strength of the precast concrete irregular-shaped pipe sleeper is consistent with the concrete strength of the pipe section foundation. S2. Elevation Measurement and Adjustment: Measure the actual elevation of the compacted crushed stone at the trench base and calculate the deviation between the actual elevation and the design elevation. If the deviation is not zero, select the corresponding number of elevation adjustment steel plates, align the openings of the elevation adjustment steel plates with the positioning holes of the pipe sleepers, and then place the elevation adjustment steel plates on the bottom of the precast concrete irregular-shaped pipe sleepers. If the deviation is zero, directly use the precast concrete irregular-shaped pipe sleepers. S3. Pipe sleeper fixing: Pass the positioning steel bars through the openings of the elevation adjustment steel plate and the positioning holes of the pipe sleeper in sequence. Use pressing or hammering to insert the lower end of the positioning steel bars into the base crushed stone layer until the top elevation of the precast concrete irregular pipe sleeper meets the design requirements, thus completing the fixing and positioning of the precast concrete irregular pipe sleeper. S4. Pipe section installation: The drainage pipe section is hoisted to the upper part of the fixed precast concrete irregular pipe pillow. The horizontal and vertical positioning of the pipe section is achieved through the arc positioning structure of the precast concrete irregular pipe pillow, ensuring that the pipe section axis is consistent with the design axis. S5. Foundation pouring in one go: Side formwork is erected on both sides and bottom of the pipe section. The coverage area of ​​the side formwork includes the gap at the bottom of the pipe section and the designed foundation area on both sides of the pipe section. Concrete is poured into the side formwork to integrate the concrete with the pipe section, the precast concrete irregular pipe sleeper and the base crushed stone layer. After the concrete has solidified, the side formwork is removed to complete the pipe section foundation construction.

[0008] This setup eliminates the need for temporary supports such as wedges and wooden wedges. Through a standardized process of "pipe sleeper prefabrication → elevation adaptation → positioning and fixing → pipe section installation → one-time pouring," it reduces redundant steps such as multiple formwork erections, demolding, bedding layer adjustments, and construction joint treatments found in traditional methods. The elevation adjustment steel plates can be flexibly combined and installed according to deviation values, eliminating the need for on-site processing and adjustment. Combined with the precise positioning function of the pipe sleepers, this shortens the installation and foundation construction cycle of a single pipe section by more than 30% compared to traditional methods. Simultaneously, it reduces the consumption of temporary support materials and the cost of repeated manual measurements and adjustments, lowers the risk of accumulated construction errors, and achieves dual optimization of project quality and construction efficiency.

[0009] As a preferred embodiment of the present invention, it also includes a construction system, which comprises precast concrete irregular-shaped pipe sleepers, positioning reinforcing bars, and elevation adjustment steel plates; the construction method is implemented based on the construction system.

[0010] This setting clearly defines the core components of the construction system, enables the coordinated adaptation of construction methods and specialized equipment, provides hardware support for the standardized and precise implementation of methods, and ensures the stability and reliability of the construction process.

[0011] As a preferred embodiment of the present invention, the upper part of the precast concrete irregular-shaped pipe sleeper is designed with an arc-shaped structure, the curvature of which is adapted to the curvature of the outer wall of the drainage pipe section, for fitting the outer wall of the pipe section; the two sides of the precast concrete irregular-shaped pipe sleeper are provided with through-holes in the vertical direction, the diameter of which is adapted to the diameter of the positioning reinforcement; the bottom end of the positioning reinforcement passes through the positioning hole of the pipe sleeper and is inserted into the crushed stone layer to achieve vertical and horizontal fixation of the precast concrete irregular-shaped pipe sleeper; the elevation adjustment steel plate is a rectangular perforated steel plate, the position and diameter of the opening on the elevation adjustment steel plate correspond one-to-one with the positioning hole of the pipe sleeper, and is used to be placed at the bottom of the precast concrete irregular-shaped pipe sleeper to adjust the installation elevation of the pipe section.

[0012] This design achieves precise pipe section positioning, secure pipe support, and convenient elevation adjustment through a pipe sleeper with an arc-shaped structure that precisely fits the pipe section, positioning holes that match the positioning reinforcement bars, and corresponding openings in the adjustment steel plate. This solves the problems of large positioning deviations and cumbersome adjustments in traditional methods.

[0013] As a preferred embodiment of the present invention, the thickness of the elevation adjustment steel plate is 15mm, and one or more plates can be selected to be placed according to the elevation deviation value. When multiple elevation adjustment steel plates are stacked, the openings of each steel plate are always aligned.

[0014] This setting limits the adjustment of steel plate thickness and stacking requirements, enabling modular and precise compensation for elevation deviations. It eliminates the need for on-site processing, improves adjustment efficiency, avoids material waste, and ensures elevation control accuracy.

[0015] As a preferred embodiment of the present invention, the positioning steel bar and the positioning hole of the pipe sleeper are interference fit, and the depth of the positioning steel bar inserted into the base crushed stone layer is not less than 300mm, so as to ensure that there is no horizontal displacement and vertical settlement after the precast concrete irregular pipe sleeper is fixed.

[0016] This feature, through interference fit and insertion depth requirements, double-locks the pipe sleeper position, resists external construction disturbances, prevents pipe sleeper displacement or settlement, and ensures long-term stable installation accuracy.

[0017] As a preferred embodiment of the present invention, the length of the precast concrete irregular pipe sleeper is 1 / 3 to 1 / 2 of the length of the pipe section, and the number of precast concrete irregular pipe sleepers arranged below the same pipe section is not less than 2, and the precast concrete irregular pipe sleepers are symmetrically distributed along the axis of the pipe section.

[0018] This setting clearly defines the pipe support dimensions and layout rules, ensuring balanced support and uniform stress distribution for the pipe sections, avoiding localized stress concentration, adapting to pipe sections of different lengths, and improving process versatility.

[0019] As a preferred embodiment of the present invention, the side formwork in step S5 is a steel formwork, and sealing strips are provided at the contact points between the steel formwork and the outer wall of the pipe section, the side wall of the precast concrete irregular pipe pillow, and the base crushed stone layer to prevent grout leakage during concrete pouring.

[0020] This design incorporates steel formwork and sealing strips to prevent grout leakage during pouring, avoid defects such as honeycomb and pitting in the foundation, ensure uniform concrete strength, and improve the construction quality of the pipe foundation.

[0021] As a preferred embodiment of the present invention, the upper inner wall of the arc-shaped structure of the precast concrete irregular-shaped pipe sleeper is provided with an anti-slip and wear-resistant layer. The anti-slip and wear-resistant layer is an epoxy resin coating with a thickness of 0.5-1mm, which is used to enhance the bonding stability between the pipe section and the precast concrete irregular-shaped pipe sleeper and prevent the pipe section from sliding during installation.

[0022] This feature includes an anti-slip and wear-resistant layer to enhance the friction between the pipe section and the pipe support, preventing the pipe section from slipping or misaligning, protecting the outer wall of the pipeline, and ensuring positioning accuracy to avoid installation deviations.

[0023] As a preferred embodiment of the present invention, a vertical reinforcing steel pipe is installed on the outer side of the side mold, and the tops of the vertical reinforcing steel pipes are connected and fixed by tie steel pipes. A horizontal reinforcing steel pipe is installed on the outer side of the vertical reinforcing steel pipe, and an inclined supporting steel pipe is connected to the outside of the horizontal reinforcing steel pipe.

[0024] This three-dimensional reinforcement system enhances the rigidity and stability of the side formwork, resists the lateral pressure of concrete pouring, prevents formwork deformation and displacement, ensures the accuracy of the foundation structure dimensions, and guarantees the quality of the poured concrete.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This construction method, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, utilizes customized precast concrete irregular-shaped pipe supports. The curved structure precisely matches the curvature of the pipe section's outer wall. Combined with the interference fit between the positioning reinforcement bars and the pipe support's positioning holes, and the fixing method where the positioning reinforcement bars are inserted into the foundation's crushed stone layer for at least 300mm, the risk of horizontal displacement and vertical settlement after pipe section installation is completely eliminated. Modular installation of elevation-adjusting steel plates flexibly compensates for foundation elevation deviations, eliminating the need for repeated leveling or adjusting the pad thickness. This ensures that the pipe section installation elevation deviation is controlled within ±3mm and the coordinate deviation within ±10mm, far exceeding the traditional buried pipeline allowable deviation standards of ±15mm for elevation and ±50mm for coordinates. This ensures that the pipe section axis is completely consistent with the design axis, meeting the core requirements of gravity flow drainage pipes for slope accuracy and fundamentally preventing pipe siltation and drainage problems.

[0026] 2. This construction method, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, completely eliminates the construction joints between the flat foundation and pipe seat formed by traditional multi-stage casting. This creates a seamless integrated structure between the concrete, pipe sections, precast pipe supports, and the foundation crushed stone layer. Furthermore, the concrete strength of the precast pipe supports is consistent with that of the foundation concrete, allowing for synergistic stress distribution and continuous stress transfer, significantly improving the bearing capacity of the pipe foundation. Compared to traditional methods, the crack resistance of the pipe foundation is improved by more than 40%. Simultaneously, the overall structure effectively blocks groundwater seepage paths, providing significantly better long-term waterproofing than construction joint treatment methods. This avoids pipe foundation erosion and uneven settlement caused by leakage, extending the service life of the pipeline system.

[0027] 3. This construction method, which facilitates high-precision installation of drainage pipes and allows for one-time foundation pouring, eliminates the need for temporary supports such as wedges and wooden wedges. Through a standardized process of "pipe support prefabrication → elevation adaptation → positioning and fixing → pipe section installation → one-time pouring," it reduces redundant procedures such as multiple formwork erections, demolding, bedding layer adjustments, and construction joint treatments found in traditional methods. Elevation adjustment steel plates can be flexibly combined and installed according to deviation values, eliminating the need for on-site processing and adjustment. Combined with the precise positioning function of the pipe supports, this shortens the installation cycle of a single pipe section and foundation construction by more than 30% compared to traditional methods. Simultaneously, it reduces the consumption of temporary support materials and the cost of repeated manual measurements and adjustments, lowers the risk of accumulated construction errors, and achieves dual optimization of project quality and construction efficiency.

[0028] 4. In this construction method that facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, the precast pipe sleeper fits tightly against the outer wall of the pipe section. Combined with the anti-slip and wear-resistant layer on the arc-shaped inner wall, this ensures that the pipe section does not slip or misalign during casting, guaranteeing structural forming accuracy. The pipe sleeper, positioning reinforcement, and foundation concrete form a synergistic stress-bearing system, avoiding the stress decoupling problem between the traditional pipe sleeper and foundation concrete. This allows groundwater and soil pressure to be evenly transferred to the base, significantly improving the pipeline system's deformation resistance and long-term stability. The overall structural design adapts to the customized needs of pipe sections with different diameters, offering strong versatility and simple construction operations, suitable for various open-cut drainage pipeline construction scenarios. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the precast concrete irregular-shaped pipe sleeper in this invention; Figure 2 This is a schematic diagram of the installation of the present invention; Figure 3 This is a schematic diagram of the elevation adjustment steel plate in this invention; Figure 4 This is a structural schematic diagram of the single-cast pipe section foundation in this invention; The meanings of the labels in the diagram are as follows: 1. Precast concrete irregular-shaped pipe sleeper; 11. Arc structure; 12. Pipe sleeper positioning hole; 13. Anti-slip and wear-resistant layer; 2. Positioning reinforcement; 3. Elevation adjustment steel plate; 4. Side formwork; 41. Vertical reinforcement steel pipe; 42. Tie steel pipe; 43. Horizontal reinforcement steel pipe; 44. Support steel pipe. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a construction method that facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, such as... Figures 1-4 As shown, it includes the following steps: S1. Precast pipe sleeper: Based on the diameter of the drainage pipe section to be installed, precast concrete special-shaped pipe sleeper 1, ensuring that the upper arc of the precast concrete special-shaped pipe sleeper 1 fits tightly with the outer wall of the pipe section, and that the concrete strength of the precast concrete special-shaped pipe sleeper 1 is consistent with the concrete strength of the pipe section foundation. S2. Elevation Measurement and Adjustment: Measure the actual elevation of the trench base after compaction of crushed stone, and calculate the deviation between the actual elevation and the design elevation. If the deviation is not zero, select the corresponding number of elevation adjustment steel plates 3, align the openings of the elevation adjustment steel plates 3 with the positioning holes 12 of the pipe sleepers, and then place the elevation adjustment steel plates 3 on the bottom of the precast concrete irregular pipe sleepers 1. If the deviation is zero, directly use the precast concrete irregular pipe sleepers 1. S3. Pipe sleeper fixing: The positioning steel bar 2 is passed through the opening of the elevation adjustment steel plate 3 and the pipe sleeper positioning hole 12 in sequence. The lower end of the positioning steel bar 2 is inserted into the base crushed stone layer by pressing or hammering until the top elevation of the precast concrete irregular pipe sleeper 1 meets the design requirements, thus completing the fixing and positioning of the precast concrete irregular pipe sleeper 1. S4. Pipe section installation: The drainage pipe section is hoisted to the upper part of the fixed precast concrete irregular pipe support 1. The horizontal and vertical positioning of the pipe section is achieved through the arc positioning structure of the precast concrete irregular pipe support 1, ensuring that the pipe section axis is consistent with the design axis. S5. Foundation pouring: Side formwork 4 is erected on both sides and bottom of the pipe section. The coverage area of ​​the side formwork 4 includes the gap at the bottom of the pipe section and the designed foundation area on both sides of the pipe section. Concrete is poured into the side formwork 4 to integrate the concrete with the pipe section, the precast concrete irregular pipe sleeper 1 and the base crushed stone layer. After the concrete solidifies, the side formwork 4 is removed to complete the pipe section foundation construction.

[0032] The prefabrication of S1 pipe sleepers is precisely processed in advance according to the pipe section parameters, avoiding the problems of dimensional deviation and insufficient strength of pipe sleepers when casting on-site. At the same time, prefabrication can be carried out in batches, improving the efficiency of construction preparation and laying the foundation for the connection of subsequent processes.

[0033] The S2 elevation measurement and adjustment process uses a level instrument for precise measurement (measurement points are set every 5m, and the average value is taken for each measurement). Combined with the modular adjustment of the adjustment steel plate, it achieves precise compensation for elevation deviation, ensuring that the slope of the pipe section meets the design requirements for gravity flow drainage, and fundamentally avoiding problems such as pipe siltation and poor drainage caused by elevation deviation.

[0034] The S3-S5 process integrates the traditional multi-stage process of "foundation pouring → pipe section installation → pipe seat pouring" into "pipe pillow fixing → pipe section installation → single pouring", reducing one formwork, formwork removal and curing operation. The construction cycle of a single pipeline section is shortened by more than 30% compared with the traditional process. At the same time, there is no need to repeatedly adjust the temporary support, reducing the amount of manual measurement and rectification work and improving construction efficiency.

[0035] The S5 foundation one-time casting process completely eliminates the construction joints formed by traditional multi-stage casting, allowing the concrete to be seamlessly connected with the pipe sections, pipe supports, and the base gravel layer, blocking the groundwater seepage path and improving the pipe foundation's anti-leakage performance by more than 40%. The stress transfer of the overall structure is continuous, effectively avoiding the hidden dangers of pipe foundation cracking and uneven settlement caused by improper treatment of construction joints, and extending the service life of the pipeline system.

[0036] Specifically, it also includes a construction system, which comprises a precast concrete irregular-shaped pipe sleeper 1, positioning reinforcing bars 2, and an elevation adjustment steel plate 3; the construction method is based on the construction system. The upper part of the precast concrete irregular-shaped pipe sleeper 1 is provided with an arc-shaped structure 11, the curvature of which is adapted to the curvature of the outer wall of the drainage pipe section, for fitting the outer wall of the pipe section; the two sides of the precast concrete irregular-shaped pipe sleeper 1 have vertically reserved through-holes 12, the diameter of which is adapted to the diameter of the positioning reinforcing bars 2; the bottom end of the positioning reinforcing bars 2 passes through the pipe sleeper positioning holes 12 and is inserted into the crushed stone layer to achieve vertical and horizontal fixation of the precast concrete irregular-shaped pipe sleeper 1; the elevation adjustment steel plate 3 is a rectangular perforated steel plate, the position and diameter of the openings on the elevation adjustment steel plate 3 correspond one-to-one with the pipe sleeper positioning holes 12, and is used to be placed at the bottom of the precast concrete irregular-shaped pipe sleeper 1 to adjust the installation elevation of the pipe section.

[0037] Furthermore, the thickness of the elevation adjustment steel plate 3 is 15mm. One or more plates can be selected for use depending on the elevation deviation, and when multiple elevation adjustment steel plates 3 are stacked, the openings of each plate are always aligned. The positioning steel bar 2 and the positioning hole 12 of the pipe sleeper are interference fit. The depth of the positioning steel bar 2 inserted into the base crushed stone layer is not less than 300mm to ensure that there is no horizontal displacement or vertical settlement after the precast concrete irregular pipe sleeper 1 is fixed. The length of the precast concrete irregular pipe sleeper 1 is 1 / 3 to 1 / 2 of the pipe section length. At least two precast concrete irregular pipe sleepers 1 are placed under the same pipe section, and the precast concrete irregular pipe sleepers 1 are symmetrically distributed along the pipe section axis. In step S5, the side formwork 4 uses steel formwork. Sealing strips are installed at the contact points between the steel formwork and the outer wall of the pipe section, the side wall of the precast concrete irregular pipe sleeper 1, and the base crushed stone layer to prevent grout leakage during concrete pouring. The upper inner wall of the arc-shaped structure 11 of the precast concrete irregular-shaped pipe sleeper 1 is provided with an anti-slip and wear-resistant layer 13. The anti-slip and wear-resistant layer 13 is an epoxy resin coating with a thickness of 0.5-1mm, which is used to enhance the bonding stability between the pipe section and the precast concrete irregular-shaped pipe sleeper 1 and prevent the pipe section from sliding during installation. Vertical reinforcing steel pipes 41 are installed on the outer side of the side mold 4. The top of the vertical reinforcing steel pipes 41 are connected and fixed by tie steel pipes 42. Horizontal reinforcing steel pipes 43 are installed on the outer side of the vertical reinforcing steel pipes 41. Inclined supporting steel pipes 44 are connected to the outside of the horizontal reinforcing steel pipes 43.

[0038] The curved structure of the precast concrete irregular-shaped pipe sleeper precisely matches the curvature of the outer wall of the pipe section, achieving a tight fit between the pipe section and the sleeper and avoiding uneven local stress during pipe section installation. Simultaneously, the concrete strength of the sleeper is consistent with that of the foundation concrete, forming a unified load-bearing system after pouring. This eliminates the problem of stress separation between the traditional pipe sleeper and foundation concrete, significantly improving the overall bearing capacity of the pipe foundation. The positioning reinforcement and the positioning holes of the pipe sleeper use an interference fit, and the insertion depth into the base crushed stone layer is no less than 300mm. This double-locking of the pipe sleeper position from both vertical and horizontal directions effectively resists external disturbances during pipe section hoisting and concrete pouring, completely preventing pipe section axis deviation caused by sleeper displacement or settlement, and ensuring long-term stable installation accuracy. The 15mm thick perforated elevation adjustment steel plate can be flexibly stacked according to the elevation deviation of the base, and the openings are precisely aligned with the positioning holes of the pipe supports. This allows for rapid compensation of deviations without on-site processing or adjustment. Compared to traditional methods such as thickening the bedding layer and adjusting with wedge blocks, the adjustment efficiency is improved by more than 50%, while avoiding material waste and ensuring that the elevation deviation of the pipe section is controlled within the design allowable range. The pipe support length is designed to be 1 / 3 to 1 / 2 of the pipe section length, with at least two pipe supports symmetrically arranged under the same pipe section. Custom prefabrication is available for pipe sections of different diameters, adapting to the construction needs of various small and medium-sized drainage pipelines. It is highly versatile and does not require redesigning the support structure for different pipe diameters.

[0039] The epoxy resin anti-slip and wear-resistant layer (0.5-1mm thick) on the inner wall of the arc-shaped structure of the precast concrete irregular-shaped pipe sleeper significantly enhances the friction between the pipe section and the pipe sleeper, preventing slippage and misalignment after the pipe section is hoisted into place and during concrete pouring, ensuring the accuracy of the pipe section's axial positioning, and reducing wear between the outer wall of the pipe section and the pipe sleeper, thus protecting the integrity of the pipeline structure. The side formwork uses steel formwork, combined with a three-dimensional reinforcement system consisting of external vertical reinforcing steel pipes, tie steel pipes, horizontal reinforcing steel pipes, and inclined support steel pipes. This effectively resists the lateral pressure during concrete pouring, preventing formwork deformation and displacement, and ensuring the accuracy of the foundation structure dimensions. The synergistic effect of the reinforcement system increases the overall rigidity of the formwork, preventing formwork slippage and bulging during pouring, and ensuring the quality of the foundation formation. Sealing strips are installed at the contact points between the steel formwork and the outer wall of the pipe section, the side wall of the pipe sleeper, and the crushed stone layer of the base to achieve a seamless seal at the splicing and bonding parts of the formwork, completely eliminating the problem of grout leakage during concrete pouring, avoiding local defects in the foundation (such as honeycomb or pitting) caused by grout leakage, ensuring uniform concrete strength, and improving the overall construction quality of the pipe foundation.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method that facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, characterized in that: Includes the following steps: S1. Precast pipe sleeper: Based on the diameter of the drainage pipe section to be installed, precast concrete special-shaped pipe sleeper (1) is made to ensure that the upper part of the precast concrete special-shaped pipe sleeper (1) is tightly fitted with the outer wall of the pipe section, and the concrete strength of the precast concrete special-shaped pipe sleeper (1) is consistent with the concrete strength of the pipe section foundation. S2. Elevation Measurement and Adjustment: Measure the actual elevation of the trench base after compaction of crushed stone, and calculate the deviation between the actual elevation and the design elevation. If the deviation value is not zero, select the corresponding number of elevation adjustment steel plates (3), align the opening of the elevation adjustment steel plate (3) with the positioning hole (12) of the pipe sleeper, and then place the elevation adjustment steel plate (3) on the bottom of the precast concrete irregular pipe sleeper (1); if the deviation value is zero, directly use the precast concrete irregular pipe sleeper (1). S3. Pipe sleeper fixing: Pass the positioning steel bar (2) through the opening of the elevation adjustment steel plate (3) and the pipe sleeper positioning hole (12) in sequence. Use pressing or hammering to insert the lower end of the positioning steel bar (2) into the base crushed stone layer until the top elevation of the precast concrete irregular pipe sleeper (1) meets the design requirements, and complete the fixing and positioning of the precast concrete irregular pipe sleeper (1). S4. Pipe section installation: The drainage pipe section is hoisted to the upper arc of the fixed precast concrete irregular pipe pillow (1). The horizontal and vertical positioning of the pipe section is achieved through the arc positioning structure of the precast concrete irregular pipe pillow (1), ensuring that the pipe section axis is consistent with the design axis. S5. Foundation pouring: Side formwork (4) is erected on both sides and bottom of the pipe section. The coverage of the side formwork (4) includes the gap at the bottom of the pipe section and the designed foundation area on both sides of the pipe section. Concrete is poured into the side formwork (4) so ​​that the concrete is integrated with the pipe section, the precast concrete irregular pipe sleeper (1) and the base crushed stone layer. After the concrete solidifies, the side formwork (4) is removed to complete the pipe section foundation construction.

2. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: It also includes a construction system, which includes precast concrete irregular pipe sleepers (1), positioning steel bars (2) and elevation adjustment steel plates (3); the construction method is based on the construction system.

3. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: The upper part of the precast concrete irregular pipe sleeper (1) is set as an arc structure (11), the curvature of the arc structure (11) is adapted to the curvature of the outer wall of the drainage pipe section, and is used to fit the outer wall of the pipe section; the two sides of the precast concrete irregular pipe sleeper (1) are reserved with through-holes (12) in the vertical direction, and the diameter of the positioning hole (12) is adapted to the diameter of the positioning steel bar (2); the bottom end of the positioning steel bar (2) passes through the positioning hole (12) of the pipe sleeper and is inserted into the crushed stone layer to realize the vertical and horizontal fixation of the precast concrete irregular pipe sleeper (1); the elevation adjustment steel plate (3) is a rectangular perforated steel plate, and the opening position and diameter of the elevation adjustment steel plate (3) correspond one-to-one with the positioning hole (12) of the pipe sleeper, and is used to be placed at the bottom of the precast concrete irregular pipe sleeper (1) to adjust the installation elevation of the pipe section.

4. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: The thickness of the elevation adjustment steel plate (3) is 15mm. One or more plates can be selected to be placed according to the elevation deviation value. When multiple elevation adjustment steel plates (3) are stacked, the openings of each steel plate are always aligned.

5. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: The positioning steel bar (2) and the positioning hole (12) of the pipe sleeper are interference fit. The depth of the positioning steel bar (2) inserted into the base crushed stone layer is not less than 300mm, so as to ensure that there is no horizontal displacement and vertical settlement after the concrete precast irregular pipe sleeper (1) is fixed.

6. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: The length of the precast concrete irregular pipe sleeper (1) is 1 / 3 to 1 / 2 of the length of the pipe section. The number of precast concrete irregular pipe sleepers (1) arranged under the same pipe section is not less than 2, and the precast concrete irregular pipe sleepers (1) are symmetrically distributed along the axis of the pipe section.

7. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: In step S5, the side formwork (4) is made of steel formwork. Sealing strips are installed at the contact points between the steel formwork and the outer wall of the pipe section, the side wall of the precast concrete irregular pipe pillow (1), and the base crushed stone layer to prevent grout leakage during concrete pouring.

8. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: The upper inner wall of the arc structure (11) of the precast concrete irregular pipe pillow (1) is provided with an anti-slip and wear-resistant layer (13). The anti-slip and wear-resistant layer (13) is an epoxy resin coating with a thickness of 0.5-1mm. It is used to enhance the bonding stability between the pipe section and the precast concrete irregular pipe pillow (1) and to prevent the pipe section from sliding during installation.

9. The construction method according to claim 1, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: A vertical reinforcing steel pipe (41) is installed on the outside of the side mold (4), and the tops of the vertical reinforcing steel pipe (41) are connected and fixed by tie steel pipes (42).

10. The construction method according to claim 9, which facilitates high-precision installation of drainage pipes and allows for one-time foundation casting, is characterized in that: A horizontally reinforcing steel pipe (43) is installed on the outside of the vertical reinforcing steel pipe (41), and an inclined supporting steel pipe (44) is connected to the outside of the horizontal reinforcing steel pipe (43).

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