A rapid construction method for a steel pipe pile support system with embedded steel

Abstract

The present invention relates to the field of building construction technology, specifically to a steel pipe pile support system with embedded steel sections and a rapid construction method, comprising steel pipe piles, steel sections arranged inside the steel pipe piles, and perforations on the steel sections. The support system further comprises support assemblies arranged at the upper and lower ends of the steel pipe piles, the support assemblies comprising: a positioning crossbar, a fixing nut, and a positioning nut. The positioning crossbar passes through the perforations, and the positioning nuts are arranged on the positioning crossbar and placed at both ends of the perforations. The fixing nuts are arranged on the positioning crossbar and placed at both ends of the perforations and abut against the inner wall of the steel pipe pile during positioning. The support system further comprises a positioning assembly arranged at the bottom of the steel sections. The presence of the sliding rod provides additional space for movement for the positioning rod, making the positioning process more flexible and precise, and also significantly improving the bending resistance, tensile strength, and other properties of the steel pipe piles. Filling the interior of the steel pipe with cement mortar can significantly enhance the connection effect between the steel pipe pile and the embedded steel sections, and improve the overall bending resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a rapid construction method for a steel pipe pile support system with embedded section steel. Background Art

[0002] Support technologies such as slope spraying, pile-sheet retaining wall, and anchor retaining wall are widely used in engineering practice, but they each have some disadvantages:

[0003] Slope shotcrete support: It is easy to collapse locally due to soaking in the rainy season, and the backfill soil is large, which has a greater impact on the surrounding environment; it has high requirements for the soil layer and groundwater conditions, and dry drilling is used as much as possible; in case of backfill soil and local soft soil layers, it is better to replace the reinforced soil nails with steel flower tube soil nails and use an impactor to drive them in for better results.

[0004] Pile-sheet retaining wall support: Construction takes a relatively long time, and excavation cannot begin until the mixing piles or jet grouting piles reach a certain strength. Deep mixing piles are prone to splitting when constructed in thick sand layers, requiring multiple overlapping rows. Due to the poor tensile and shear resistance of mixing piles, steel pipes or steel sections are generally inserted and crown beams are installed. In narrow areas where mechanical mixing piles are impractical, high-pressure jet grouting piles can be used as an alternative.

[0005] Anchor retaining wall support: Soil anchors require relatively good geological conditions, and there must also be sufficiently open site conditions or the anchors can be allowed to extend into the soil layer beyond the red line; in soft soil areas, anchors are rarely used due to the lack of sufficient anchoring force in the soil layer. If the anchors are anchored in a very deep sand layer, the length of the anchors will be very long, which is not an economical solution.

[0006] There is an urgent need for a rapid construction method for a steel pipe pile support system with embedded steel sections to solve some of the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a rapid construction method for a steel pipe pile support system with embedded steel sections, so as to solve the defects of insufficient bending resistance of single piles, poor force coordination between piles, and reduced support capacity due to misplaced installation of steel pipes.

[0008] The present invention is achieved through the following technical solutions:

[0009] A steel pipe pile support system with embedded steel sections, comprising steel pipe piles, wherein steel sections are arranged in the steel pipe piles, and the steel sections are provided with through-holes. The support system also includes support components arranged at the upper and lower ends of the steel pipe piles, and the support components include: a positioning cross bar, a fixing nut and a positioning nut. The positioning cross bar passes through the through-hole, and the positioning nut is arranged on the positioning cross bar and placed at both ends of the through-hole. The fixing nut is arranged on the positioning cross bar and placed at both ends of the through-hole and abuts against the inner wall of the steel pipe pile during positioning; the support system also includes a positioning component arranged at the bottom of the steel section, and the positioning component completes the positioning process as the steel section moves in the steel pipe column.

[0010] A rapid construction method for a steel pipe pile support system with embedded steel sections, comprising the following steps: Step 1, site leveling, wherein the compaction coefficient during the site leveling process is not less than 0.9; Step 2, steel pipe pile construction, wherein the construction process sequentially comprises: steel pipe production, measurement and layout, hole spacing positioning, in-place drilling, steel pipe installation, steel section installation, positioning calibration, hole cleaning, grouting machine installation, grouting pipe installation, cement mortar mixing, cement mortar injection, and pressure grouting; Step 3, crown beam construction, wherein the construction process sequentially comprises: determining the baseline, leveling the earthwork, cleaning the foundation trench and constructing the cushion layer, steel bar binding and formwork installation, pouring concrete, and formwork removal and maintenance; Step 4, layered earthwork excavation, wherein before excavation, a measurement control network is set up to measure and control the control baseline, axis, and horizontal reference point; Step 5, steel plate wall construction, wherein the construction process sequentially comprises: cleaning the soil between the piles, lowering the steel plate, and welding; Step 6, grouting, wherein during the grouting process, the steel plate ensures that water is discharged through the drainage hole.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] 1. The present invention significantly improves the bending and tensile properties of steel pipe piles by embedding steel sections, preferably H-section steel, in the steel pipe piles. Filling the steel pipe with cement mortar significantly enhances the connection between the steel pipe pile and the embedded steel sections, thereby improving the overall bending resistance. When drilling holes in the steel pipe pile body and filling the steel pipe pile with cement mortar, the gap between the steel pipe pile and the backfill soil layer is simultaneously filled and compacted, thereby enhancing the support effect of the steel pipe pile. The upper end of the H-section steel, the steel pipe jacking pipe, and the crown beam reinforcement cage are connected and integrally cast into a concrete crown beam, thereby significantly improving the overall stability between the steel pipe piles.

[0013] 2. The branch pipe of the present invention is arranged at the bottom of the steel section and is slidably arranged with the upper end of the positioning base. This sliding structure allows the positioning assembly to move synchronously when the steel section moves in the steel pipe, ensuring the free movement and precise positioning of the steel section in the steel pipe. The middle part of the positioning rod is hinged with a sliding rod, and the free end of the sliding rod is hingedly arranged on the outer peripheral surface of the end of the branch pipe, so that the positioning rod can flexibly adjust its position during the movement of the steel section to adapt to different construction environments and requirements. The presence of the sliding rod provides additional movement space for the positioning rod, making the positioning process more flexible and precise.

[0014] 3. The positioning block of the present invention also includes a moving rod connected to the limit rod, and a positioning ring connected to the moving rod. The positioning ring is a fan ring structure, and the moving rod slides in the slide groove. This design allows the positioning block to move flexibly in the slide groove to achieve precise positioning. The fan ring structure design of the positioning ring enables it to rotate flexibly within a certain angle range to adapt to forces in different directions, thereby increasing the adaptability and stability of the positioning assembly. Through the above-mentioned complex mechanical linkage, the positioning assembly can ensure the precise positioning of the steel section in the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0016] Figure 1 Schematic diagram of the overall structure of the system of the present invention;

[0017] Figure 2 It is a top view of the overall structure of the system of the present invention;

[0018] Figure 3 A partial cross-sectional view of the overall structure of the system of the present invention;

[0019] Figure 4 A front view of the positioning assembly of the system of the present invention;

[0020] Figure 5 An axial view of the positioning assembly of the system of the present invention;

[0021] Figure 6 A top view of the positioning components of the system of the present invention;

[0022] Figure 7 Schematic diagram of the process of the present invention.

[0023] The reference numerals represent:

[0024] 1-steel pipe pile, 2-section steel, 3-perforation, 4-support component, 5-positioning component;

[0025] 41-positioning crossbar, 42-fixing nut, 43-positioning nut;

[0026] 51-positioning base, 52-branch pipe, 53-positioning rod, 54-sliding rod, 55-sliding sleeve, 56-sliding groove seat, 57-positioning block, 58-limiting rod, 59-guide groove;

[0027] 571-moving rod, 572-positioning ring. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the examples and accompanying drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0029] Example 1:

[0030] Please refer to the attached Figures 1 to 6 , a steel pipe pile support system with embedded steel, comprising a steel pipe pile 1, wherein a steel section 2 is arranged in the steel pipe pile 1, and a through-hole 3 is provided on the steel section 2. The support system further comprises support components 4 arranged at the upper and lower ends of the steel pipe pile 1, and the support component 4 comprises: a positioning cross bar 41, a fixing nut 42 and a positioning nut 43. The positioning cross bar 41 passes through the through-hole 3, and the positioning nut 43 is arranged on the positioning cross bar 41 and placed at both ends of the through-hole 3. The fixing nut 42 is arranged on the positioning cross bar 41 and placed at both ends of the through-hole 3 and abuts against the inner wall of the steel pipe pile 1 during positioning; the support system further comprises a positioning component 5 arranged at the bottom of the steel section 2, and the positioning component 5 completes the positioning process as the steel section 2 moves in the steel pipe column.

[0031] It should be noted that compared with traditional support technologies such as natural slope spray anchoring, pile-sheet retaining wall, and anchor rod retaining wall, the steel pipe pile support system with embedded steel and the rapid construction method used in this embodiment have the outstanding advantages of small hole diameter, efficient and safe construction, short construction period, rapid emergency response for emergency projects, and reliable forming quality. It has little disturbance to the entire geological environment, will not cause secondary damage, and has little impact on the urban environment such as surrounding public facilities, human settlements and travel.

[0032] Specifically, the micro-steel 2 pipe pile 1 with built-in steel 2 support technology overcomes the defects of insufficient bending resistance of a single pile and poor coordination of forces between piles, and greatly improves the bending resistance, tensile strength and other properties of the steel pipe pile 1. Compared with traditional anti-slip piles, micro-steel 2 pipe piles 1 occupy a small area, are particularly suitable for urban center areas and mountainous sites, and have a fast construction speed, suitable for emergency reinforcement projects. However, due to the small diameter of the micro-steel 2 pipe pile 1, the bending resistance of a single pile may sometimes appear insufficient. Therefore, the micro-steel 2 pipe pile 1 with built-in steel 2 overcomes the defects of insufficient bending resistance of a single pile and poor coordination of forces between piles. Reinforced steel 2 is placed in the steel pipe, an outer mortar layer is filled between the steel pipe and the external soil layer, and an inner mortar layer is filled between the steel pipe and the reinforced steel 2. The reinforced steel 2 and the upper end of the steel pipe pile 1 are connected to the horizontal steel cage of the crown beam to form an integral cast concrete crown beam.

[0033] By embedding steel sections 2, preferably H-shaped steel 2, in the steel pipe pile 1, the bending resistance, tensile strength and other properties of the steel pipe pile 1 can be greatly improved; filling cement mortar inside the steel pipe can significantly enhance the connection effect between the steel pipe pile 1 and the embedded steel sections 2, and improve the overall bending resistance; when drilling holes in the steel pipe pile 1 and filling cement mortar in the steel pipe pile 1, the gap between the steel pipe pile 1 and the backfill soil layer is filled and compacted at the same time, thereby enhancing the support effect of the steel pipe pile 1; the upper end of the H-shaped steel 2 and the steel pipe top pipe are connected to the crown beam reinforcement cage, and the whole is cast into a concrete crown beam, which significantly improves the overall stability between the steel pipe piles 1.

[0034] The built-in steel 2 temporary fixation construction technology is used to locate the exposed part of the H-shaped steel 2 through the hole 3, and the H-shaped steel 2 is temporarily fixed to the top of the steel pipe by using steel bars to pass through the hole 3, with good results.

[0035] Specifically, the H-shaped steel 2 built into the extra-long micro steel 2 tube can greatly improve the bending and tensile properties of the steel pipe pile 1. Usually, the upper part of the steel pipe is subjected to the greatest stress and deformation. Taking full consideration of economic savings, the H-shaped steel 2 needs to be inserted 9m from the top of the pile and exposed 300mm from the top of the steel pipe. It is cast in the crown beam together with the top of the steel pipe to enhance the upper bending and tensile properties. Since the H-shaped steel 2 does not extend to the bottom of the steel pipe, the H-shaped steel 2 needs to be fixed and suspended inside the steel pipe. In this embodiment, a temporary fixed construction technology of built-in steel 2 is adopted. The positioning ribs are crossed at the drilling position of the H-shaped steel 2 to temporarily fix the H-shaped steel 2 to the top of the steel pipe. Then, high-strength cement mortar is poured to bond the H-shaped steel 2 and the steel pipe pile 1 to form a whole. Finally, the H-shaped steel 2 is cast in the crown beam together with the steel pipe pile 1.

[0036] In addition, a gravity-type static press is used to statically press the steel pipe piles 1 into the designed elevation without damaging the pile surface. This method offers advantages such as efficient and safe construction, stable operation, noiselessness, and no disturbance to residents. Block welding is employed, and the stress and strain of the steel plate retaining wall welding are controlled according to the principles of block skip welding and symmetrical welding. The entire structure is welded from the center outward to the sides, achieving a large-area steel plate retaining wall. Block welding is performed in rotation to avoid structural deformation caused by welding.

[0037] Finally, the positioning base 51 serves as the basic part of the positioning assembly 5, and its function is to provide a stable support point for the movement of the steel section 2 in the steel pipe; when the positioning base 51 touches the bottom, it can ensure the precise position of the steel section 2 in the steel pipe, thereby ensuring the stability of the entire support system; the outer peripheral surface of the positioning base 51 is hingedly provided with a positioning rod 53, this design allows the positioning rod 53 to rotate freely on the positioning base 51, increasing the flexibility and adaptability of the system.

[0038] The branch pipe 52 is arranged at the bottom of the steel section 2 and slides with the upper end of the positioning base 51. This sliding structure allows the positioning assembly 5 to move synchronously when the steel section 2 moves within the steel pipe, ensuring the free movement and precise positioning of the steel section 2 within the steel pipe. A sliding rod 54 is hinged to the middle of the positioning rod 53, and the free end of the sliding rod 54 is hinged to the outer peripheral surface of the end of the branch pipe 52, so that the positioning rod 53 can flexibly adjust its position during the movement of the steel section 2 to adapt to different construction environments and requirements. The presence of the sliding rod 54 provides additional movement space for the positioning rod 53, making the positioning process more flexible and precise. The sliding disc 55 is arranged on the outer periphery of the branch pipe 52 by threaded rotation. This threaded connection method not only provides reliable connection strength, but also allows the sliding disc 55 to be fine-tuned when needed to adapt to different construction conditions. This design of the sliding disc 55 increases the adjustability of the system, allowing construction personnel to make precise adjustments according to actual needs. The slide seat 56 is fixed on the upper end surface of the positioning base 51, and a number of slide grooves are evenly distributed on it. The positioning block 57 is slidably set in the slide groove. The above structural design allows the positioning block 57 to move freely in the slide groove, thereby achieving accurate positioning of the steel section 2; a limiting rod 58 is provided on the positioning block 57, and a number of guide grooves 59 matching the limiting rod 58 are evenly distributed on the sliding sleeve 55. This structural design allows the positioning block 57 to be synchronously displaced under the drive of the sliding sleeve 55, further improving the accuracy of positioning.

[0039] It should be noted that the positioning assembly 5 includes a positioning base 51 and a branch pipe 52 arranged at the bottom of the steel section 2. The branch pipe 52 is slidably arranged with the upper end of the positioning base 51. The outer peripheral surface of the positioning base 51 is hingedly provided with a positioning rod 53. The middle part of the positioning rod 53 is hingedly provided with a slide rod 54. The free end of the slide rod 54 is hingedly provided on the outer peripheral surface of the end of the branch pipe 52. During the movement of the steel section 2 in the steel pipe column, when the positioning base 51 does not touch the bottom, the positioning assembly 5 moves synchronously with the steel section 2. When the positioning base 51 touches the bottom, the branch pipe 52 slides on the positioning base 51 and moves the end of the positioning rod 53 toward the periphery until it abuts against the inner wall of the steel pipe pile 1 to complete the positioning. It should also be noted that, based on the above structure, this design of the positioning component 5 provides a simple and effective mechanism to ensure the precise positioning of the steel section 2 in the steel pipe, thereby improving the accuracy and efficiency of construction. It not only reduces the adjustment work during the construction process and reduces construction costs, but also helps to improve the stability and reliability of the entire support structure. By ensuring the correct positioning of the steel section 2, the system can better resist external forces such as soil pressure and groundwater flow, thereby providing more stable and safe support for the construction site.

[0040] It should be noted that the positioning assembly 5 also includes a sliding sleeve disc 55, a sliding groove seat 56 and several positioning blocks 57. The sliding sleeve disc 55 is arranged on the outer periphery of the branch pipe 52 by threaded rotation, and the sliding groove seat 56 is fixedly arranged on the upper end surface of the positioning base 51. The upper part of the sliding groove seat 56 is evenly spaced with several sliding grooves, and the positioning block 57 is slidably arranged in the sliding groove. A limiting rod 58 is also provided on the positioning block 57, and a number of guide grooves 59 matching the limiting rod 58 are evenly spaced on the sliding sleeve disc 55. In the process of the positioning base 51 touching the bottom, the steel section 2 and the branch pipe 52 continue to fall, and the sliding sleeve disc 55 is driven to rotate by the thread. At the same time, the synchronous displacement of the positioning block 57 on the sliding groove seat 56 is realized through the guide groove 59 and the limiting rod 58, so as to realize the positioning support of the steel pipe pile 1.

[0041] It should also be noted that, based on the above structure, the addition of the positioning assembly 5 to the steel pipe pile 1 support system with embedded steel section 2 significantly improves the accuracy and stability of the positioning of the steel section 2 within the steel pipe. In addition to the aforementioned positioning base 51 and branch pipe 52, the positioning assembly 5 also innovatively introduces a sliding disc 55, a slide seat 56, and a positioning block 57. The sliding disc 55 is arranged on the outer periphery of the branch pipe 52 by threaded rotation. When the positioning base 51 touches the bottom and the steel section 2 and branch pipe 52 continue to fall, the rotation of the thread drives the sliding disc 55 to rotate accordingly. The rotation of the sliding disc 55 cooperates with the limit rod 58 on the positioning block 57 through the evenly distributed guide grooves 59 on it, achieving synchronous displacement of the positioning block 57 within the slide groove on the slide seat 56. This sophisticated thread transmission and the guide groove 59-limit rod 58 coordination mechanism ensures that the steel section 2 can be accurately positioned within the steel pipe, while being able to adapt to different sinking depths, thereby improving the adaptability and reliability of the system.

[0042] More specifically, the slide seat 56 is fixed to the upper end surface of the positioning base 51, and is provided with a plurality of slide grooves. The positioning block 57 slides in these slide grooves, increasing the flexibility of the positioning assembly 5. The limit rod 58 of the positioning block 57 interacts with the guide groove 59 on the sliding sleeve disk 55, so that the positioning block 57 can move smoothly along the slide groove, thereby accurately controlling the position of the steel section 2. The above structural design not only improves the accuracy of positioning, but also reduces the risk of displacement of the steel section 2 due to construction errors, thereby ensuring the stability and bearing capacity of the steel pipe pile 1.

[0043] In this embodiment, it is preferred that the length of the thread that engages the sleeve disc 55 with the branch pipe 52 is less than the maximum displacement length of the positioning block 57 within the chute. In this embodiment, it is preferred that the positioning block 57 further include: a moving rod 571 connected to the limiting rod 58, a positioning ring 572 connected to the moving rod 571, the positioning ring 572 being a fan-shaped ring structure, and the moving rod 571 being slidably disposed within the chute. The length of the thread that engages the sleeve disc 55 with the branch pipe 52 is designed to be less than the maximum displacement length of the positioning block 57 within the chute. The power provided by the thread is sufficient to achieve precise control throughout the entire travel of the positioning block 57, without causing excessive rotation or insufficient power due to an excessively long thread length.

[0044] Example 2:

[0045] As attached Figure 7As shown, a rapid construction method for a steel pipe pile support system with embedded steel sections, comprising the following steps: Step 1, site leveling, wherein the compaction coefficient during the site leveling process is not less than 0.9; Step 2, construction of steel pipe piles 1, wherein the construction process sequentially comprises: steel pipe production, measurement and layout, hole spacing positioning, in-situ drilling, installation of steel pipes, installation of steel sections 2, positioning and calibration, hole cleaning, installation of grouting machines, installation of grouting pipes, mixing of cement mortar, injection of cement mortar and pressure grouting; Step 3, construction of crown beams, wherein the construction process sequentially comprises: determination of baseline, leveling of earthwork, cleaning of foundation trenches and construction of cushion layers, installation of steel bar binding formwork, pouring of concrete, and removal of formwork and maintenance; Step 4, layered excavation of earthwork, wherein before excavation, a measurement control network is set up to measure and control the control baseline, axis and horizontal reference point; Step 5, construction of steel plate walls, wherein the construction process sequentially comprises: cleaning of soil between piles, lowering of steel plates and welding; Step 6, grouting, wherein during the grouting process, the steel plates ensure that water is discharged through the drainage holes.

[0046] Step 2 specifically includes: Step 2.1, steel pipe production: cutting according to the depth required by the design drawings, and welding the steel pipe joints; Step 2.2, measurement and layout: measurement and layout according to the spacing, row spacing and elevation required by the design; Step 2.3, hole spacing positioning: using a locator to drill into the ground for positioning according to the designed hole diameter, spacing and row spacing, and using an auger to locate the hole position; Step 2.4, drilling in place: after placing the drill and ensuring it is level, start the drill Drilling is carried out, and the drill rod is connected every 3m until the designed depth is reached, and the verticality of the drill rod is checked; Step 2.5, installation of steel pipe: Use a crane to lower the steel pipe, and then use a gravity static press to lower the steel pipe to the designed elevation position, and check the verticality of steel pipe pile 1; Step 2.6, installation of steel section 2: Scan the QR code of the built-in steel section 2 to determine the number of the steel pipe pile 1 to be placed, and use a crane to lift the built-in steel section 2 into the steel pipe pile 1; Step 2.7, positioning calibration: Use the positioning cross bar 41 and the fixing nut 42, the positioning nut 43 are used in conjunction to position the steel 2 at the center of the steel pipe and control the installation height; Step 2.8, hole cleaning: Before injecting grout, use a high-pressure air compressor to clean the pile hole to ensure that the thickness of the sediment in the hole is not more than 50mm, and use a spray device to control dust; Step 2.9, grouting machine installation: After fixing the grouting machine, connect it to the power supply; Step 2.10, grouting pipe installation: After lowering the steel pipe, the grouting pipe is directly connected to the grouting machine. To the steel pipe in the entry hole, the interface is sealed and connected, and the grouting is transported by rubber tube; Step 2.11, mix cement mortar: the water-cement ratio is controlled between 0.45 and 0.5; Step 2.12, inject cement mortar: the first grouting pressure is 0.5Mpa, and the pipe is not pulled out after grouting until the cement mortar flows out of the pipe, then the grouting pipe is pulled out and pressurized until the cement mortar flows out of the steel pipe again; Step 2.13, secondary pressurized grouting: perform secondary interstitial grouting until the pipe mouth turns slurry.

[0047] Step 3 specifically includes: Step 3.1, determine the baseline, according to the design requirements of the drawings, backfill the earth to the bottom elevation of the crown beam to determine the baseline; Step 3.2, level the earth so that the base size of the crown beam is 100mm to 200mm larger than the structure; Step 3.3, clean the foundation pit and construct the cushion layer: after the foundation pit is cleaned and accepted, pour the cushion layer concrete; Step 3.4, install the steel bar binding formwork: according to the material reinforcement of the design drawings, carry out steel bar material mixing and binding; Step 3.5, use concrete to cast the crown beam; Step 3.6, remove the formwork and carry out maintenance.

[0048] In summary, the steel pipe pile 1 support system with embedded profiled steel 2 and its rapid construction method in this embodiment, through innovative structural design and construction steps, achieves efficient, safe, and reliable construction of support systems in the field of building construction. The core of this system lies in the placement of profiled steel 2 within the steel pipe pile 1, with perforations 3 provided in the profiled steel 2. The coordinated use of a support assembly 4 (comprising a positioning crossbar 41, a fixing nut 42, and a positioning nut 43) and a positioning assembly 5 achieves precise positioning and fixation of the profiled steel 2 within the steel pipe.

[0049] During the construction process, the site was first leveled to ensure a compaction coefficient of no less than 0.9, laying a solid foundation for subsequent construction. Next, the construction of steel pipe piles 1 commenced, including pipe fabrication, measurement and layout, hole spacing positioning, in-place drilling, and pipe installation. These steps ensured the precise installation and positioning of steel pipe piles 1. During the steel section 2 installation step, the QR code on the embedded steel section 2 was scanned to determine the number of the steel pipe pile 1 to be inserted. The embedded steel section 2 was then hoisted into the steel pipe pile 1 using a crane. This innovative method improved construction efficiency and accuracy.

[0050] During the positioning and calibration step, the steel section 2 is positioned at the center of the steel pipe by using the positioning crossbar 41, the fixing nut 42 and the positioning nut 43 in combination, and the installation height is controlled to ensure the precise positioning of the steel section 2. During the hole cleaning step, a high-pressure air compressor is used to clean the pile hole to ensure that the thickness of the sediment in the hole is no more than 50 mm, thereby improving the grouting quality. During the grouting step, cement mortar is injected into the steel pipe through a grouting machine and a grouting pipe. The first grouting pressure is 0.5 MPa. After grouting, the pipe is not pulled out until the cement mortar flows out of the pipe, ensuring that the cement mortar in the steel pipe is densely filled.

[0051] The crown beam construction process includes determining the baseline, leveling the earthwork, clearing the foundation trench and constructing the cushion layer, tying the steel bars and installing the formwork, pouring the concrete, and removing the formwork for maintenance. These steps ensure the quality and stability of the crown beam. During the layered excavation of the earthwork, a measurement control network was established to measure and control the baseline, axis, and horizontal reference points, ensuring the accuracy and safety of the excavation. The steel plate wall construction process includes clearing the soil between the piles, lowering the steel plates, and welding. These steps improve the construction quality and efficiency of the steel plate wall. In the final grouting step, water is drained through the drainage holes to improve the grouting quality.

[0052] In terms of beneficial effects, the present invention significantly improves the bending resistance, tensile strength and other properties of the steel pipe pile 1 by embedding the steel section 2 in the steel pipe pile 1. Filling the interior of the steel pipe with cement mortar significantly enhances the connection between the steel pipe pile 1 and the embedded steel section 2, thereby improving the overall bending resistance. When drilling holes in the steel pipe pile 1 and filling the steel pipe pile 1 with cement mortar, the gap between the steel pipe pile 1 and the backfill soil layer is simultaneously filled and compacted, thereby enhancing the support effect of the steel pipe pile 1. The upper end of the H-shaped steel 2 and the steel pipe top pipe are connected to the crown beam reinforcement cage and cast as a whole as a concrete crown beam, which significantly improves the overall stability between the steel pipe piles 1.

[0053] Furthermore, during the positioning and calibration process, the positioning assembly 5 is first placed in a predetermined position. This provides a stable support base for the entire positioning assembly 5. Positioning rods 53 are hingedly connected to the outer periphery of the positioning base 51. These rods 53 can freely rotate on the base to adapt to different construction conditions. A slide rod 54 is hingedly connected to the middle of the positioning rod 53, and the free end of the slide rod 54 is hinged to the outer periphery of the end of the branch pipe 52. This design allows the positioning assembly 5 to move synchronously with the steel section 2 within the steel pipe, ensuring that the steel section 2 can slide freely within the steel pipe until it reaches the predetermined position.

[0054] When the positioning base 51 touches the bottom, that is, reaches the bottom of the steel pipe column, the branch pipe 52 will slide on the positioning base 51, pushing the end of the positioning rod 53 toward the periphery until it contacts the inner wall of the steel pipe column, completing the initial positioning. At this time, the sliding disc 55 is set on the periphery of the branch pipe 52 through threaded rotation. The rotation of the sliding disc 55 drives the positioning block 57 on the chute seat 56 to move along the chute. The length of the thread that matches the sliding disc 55 with the branch pipe 52 is designed to be less than the maximum displacement length of the positioning block 57 in the chute. This design not only ensures sufficient power transmission, but also avoids excessive rotation caused by excessive thread length.

[0055] The positioning block 57 is equipped with a limit rod 58, and the sliding plate 55 is evenly spaced with guide grooves 59 that match the limit rods 58. As the positioning base 51 touches the bottom, the steel section 2 and the branch pipe 52 continue to fall. The threaded rotation of the sliding plate 55 drives the sliding plate 55 to rotate. The guide grooves 59 interact with the limit rods 58 to achieve synchronous displacement of the positioning block 57 on the sliding groove seat 56. This synchronous displacement ensures that the steel section 2 can be accurately positioned within the steel pipe and can adapt to different sinking depths.

[0056] The positioning block 57 also includes a moving rod 571 connected to the limiting rod 58, and a positioning ring 572 connected to the moving rod 571. The positioning ring 572 is a fan-shaped ring structure, and the moving rod 571 slides in the slide groove. This design allows the positioning block 57 to move flexibly in the slide groove to achieve precise positioning. The fan-shaped ring structure design of the positioning ring 572 enables it to rotate flexibly within a certain angle range to adapt to forces in different directions, thereby increasing the adaptability and stability of the positioning assembly 5. Through the above-mentioned complex mechanical linkage, the positioning assembly 5 can ensure the precise positioning of the steel section 2 in the steel pipe.

[0057] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid construction method for a steel pipe pile support system with embedded steel sections, the construction method being based on a steel pipe pile support system with embedded steel sections, the system comprising steel pipe piles (1), characterized in that: The construction method comprises the following steps: Step 1: site leveling. The compaction coefficient during site leveling should be no less than 0.

9. Step 2, construction of steel pipe piles (1), the construction process includes: steel pipe production, measurement and layout, hole spacing positioning, in-place drilling, installation of steel pipes, installation of steel sections (2), positioning and calibration, hole cleaning, installation of grouting machines, installation of grouting pipes, mixing of cement mortar, injection of cement mortar and pressure grouting; Step 3: Crown beam construction. The construction process includes: determining the baseline, leveling the earthwork, cleaning the foundation pit and constructing the cushion layer, tying the steel bars and installing the formwork, pouring concrete, and removing the formwork for maintenance. Step 4: Excavate the earthwork in layers. Before excavation, set up a survey control network to measure and control the control baseline, axis and horizontal reference points; Step 5: Steel plate wall construction. The construction process includes: cleaning the soil between the piles, lowering the steel plate, and welding. Step 6: Grouting. During the grouting process, the steel plate ensures that water is discharged through the drainage holes. Step 2 specifically includes: Step 2.1, steel pipe production: cut the steel pipe according to the depth required by the design drawing and weld the steel pipe joints; Step 2.2, measurement and layout: Measure and layout according to the spacing and row spacing required by the design and the elevation provided by the design; Step 2.3, hole spacing positioning: Use a locator to drive into the ground for positioning according to the designed hole diameter, spacing, and row spacing, and use an auger to locate the hole position; Step 2.4, drilling in place: After placing the drilling rig and ensuring it is level, start the drilling rig and drill, connecting the drill rod every 3m until the designed depth is reached, and check the verticality of the drill rod; Step 2.5, installing the steel pipe: Use a crane to lower the steel pipe, and then use a gravity static press to lower the steel pipe to the designed elevation, and check the verticality of the steel pipe pile (1); Step 2.6, steel section (2) installation: Scan the QR code of the built-in steel section (2) to determine the number of the steel pipe pile (1) to be placed, and use a crane to lift the built-in steel section (2) into the steel pipe pile (1); Step 2.7, positioning and calibration: by using the positioning crossbar (41), the fixing nut (42) and the positioning nut (43), the section steel (2) is positioned at the center of the steel pipe and the installation height is controlled; Step 2.8, hole cleaning: Before injecting cement slurry, use a high-pressure air compressor to clean the pile hole to ensure that the thickness of the sediment in the hole is no more than 50mm, and use a spray device to control dust; Step 2.9, grouting machine installation: After fixing the grouting machine, connect it to the power supply; Step 2.10, install the grouting pipe: After the steel pipe is lowered, the grouting pipe is directly connected to the steel pipe in the entry hole by the grouting machine. The interface is sealed and the grouting is transported by rubber hose; Step 2.11, mix cement mortar: control the water-cement ratio between 0.45 and 0.5; Step 2.12, cement mortar injection: The first grouting pressure is 0.5 MPa. After grouting, do not pull out the pipe until the cement mortar flows out of the pipe. Pull out the grouting pipe and increase the pressure until the cement mortar flows out of the steel pipe again. Step 2.13, secondary pressure grouting: perform secondary gap grouting until the pipe mouth is grouting; Wherein, a steel section (2) is provided in the steel pipe pile (1), and a through hole (3) is provided on the steel section (2). The support system further comprises a support assembly (4) provided at the upper and lower ends of the steel pipe pile (1), and the support assembly (4) comprises: a positioning cross bar (41), a fixing nut (42) and a positioning nut (43). The positioning cross bar (41) passes through the through hole (3), and the positioning nut (43) is provided on the positioning cross bar (41) and is placed at both ends of the through hole (3). The fixing nut (42) is provided on the positioning cross bar (41) and is placed at both ends of the through hole (3) and abuts against the inner wall of the steel pipe pile (1) during positioning. The support system further comprises a positioning assembly (5) arranged at the bottom of the section steel (2), wherein the positioning assembly (5) completes the positioning process as the section steel (2) moves within the steel pipe column; The positioning assembly (5) includes a positioning base (51) and a branch pipe (52) arranged at the bottom of the section steel (2), the branch pipe (52) and the upper end of the positioning base (51) are slidably arranged, the outer peripheral surface of the positioning base (51) is hingedly provided with a positioning rod (53), the middle part of the positioning rod (53) is hingedly provided with a slide rod (54), and the free end of the slide rod (54) is hingedly provided on the outer peripheral surface of the end of the branch pipe (52). During the movement of the section steel (2) in the steel pipe column, when the positioning base (51) does not touch the bottom, the positioning assembly (5) moves synchronously with the section steel (2), and when the positioning base (51) touches the bottom, the branch pipe (52) slides on the positioning base (51) and causes the end of the positioning rod (53) to move toward the outer periphery until it abuts against the inner wall of the steel pipe pile (1) to complete the positioning; The positioning assembly (5) further comprises a sleeve disc (55), a slide seat (56) and a plurality of positioning blocks (57), wherein the sleeve disc (55) is arranged on the outer periphery of the branch pipe (52) by means of a threaded rotation, the slide seat (56) is fixedly arranged on the upper end surface of the positioning base (51), a plurality of slide grooves are evenly distributed on the upper portion of the slide seat (56), and the positioning block (57) is slidingly arranged in the slide groove, and a limiting rod (58) is further provided on the positioning block (57), and a plurality of guide grooves (59) are evenly distributed on the sleeve disc (55) and matched with the limiting rod (58). When the positioning base (51) touches the bottom, the steel section (2) and the branch pipe (52) continue to fall, and the sleeve disc (55) is driven to rotate by the threaded rotation, and at the same time, the positioning block (57) is synchronously displaced on the slide seat (56) by means of the guide groove (59) and the limiting rod (58), so as to realize the positioning support of the steel pipe pile (1); The positioning block (57) further comprises: a moving rod (571) connected to the limiting rod (58), a positioning ring (572) connected to the moving rod (571), the positioning ring (572) being a fan ring structure, and the moving rod (571) being slidably disposed in a sliding groove.

2. The rapid construction method of a steel pipe pile support system with embedded steel according to claim 1, characterized in that: The thread length of the sliding sleeve disc (55) and the branch pipe (52) is smaller than the maximum displacement length of the positioning block (57) in the sliding groove.

3. The rapid construction method of a steel pipe pile support system with embedded steel according to claim 1, characterized in that: Step 3 specifically includes: Step 3.1: Determine the baseline. According to the design requirements of the drawings, backfill the earthwork to the bottom elevation of the crown beam to determine the baseline; Step 3.2: Level the earthwork so that the base of the crown beam is 100mm to 200mm larger than the structure; Step 3.3, clean the foundation pit and construct the cushion layer: pour the cushion layer concrete after the foundation pit is cleaned and accepted; Step 3.4, installation of steel bar binding template: carry out steel bar material matching and binding according to the design drawing material reinforcement; Step 3.5, pouring the crown beam with concrete; Step 3.6, remove the mold and carry out maintenance.

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