Prestressed concrete square pile auxiliary connector and connecting method

Abstract

The present application relates to the field of building construction technology, and specifically to a prestressed concrete square pile auxiliary connector, which comprises a clamping assembly, the clamping assembly is bent from a steel plate, the inside of the clamping assembly is a groove structure for covering and fixing the end of the lower section square pile; a positioning assembly, the positioning assembly comprises positioning bolts and positioning holes around the clamping assembly, the positioning holes are pre-set in the square pile body, and the positioning bolts are inserted into the positioning holes pre-set in the square pile body; a connecting and fastening assembly, the connecting and fastening assembly comprises a connecting plate and connecting bolts, the connecting bolts pass through the connecting plate and are threadedly connected with the clamping assembly; a level, the level is placed outside the clamping assembly and is used for assisting in calibrating the perpendicularity of the pile body. The present application discards the operation mode of needing multiple workers to cooperate and repeatedly position in the traditional welding connection, and one person can complete the butt joint and calibration of the square pile, which significantly improves the construction progress and reduces the personnel configuration demand in high-altitude or narrow working surface.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to an auxiliary connector and connection method for prestressed concrete square piles. Background Technology

[0002] With the deepening development of industrial systems in coastal areas, the scale of construction projects is constantly expanding. However, the geological conditions in coastal areas are complex, mainly consisting of soft soil layers such as silt and silty clay, with the soil in a fluid or soft-plastic state, posing significant challenges to foundation treatment. Prestressed concrete square piles, due to their excellent bearing capacity and adaptability, are widely used in foundation engineering under such geological conditions.

[0003] In the construction of prestressed concrete square piles, it is often necessary to extend multiple pile sections. Currently, the traditional method of extending square piles mainly relies on manual support and welding after joining, which has the following problems: First, it is difficult to guarantee the joining accuracy, which can easily lead to axial deviation and affect the verticality of the pile; second, the construction efficiency is low, requiring multiple workers to work together, which is time-consuming; third, the welding quality is unstable, and rework is easily caused by inaccurate positioning, increasing construction costs.

[0004] Therefore, there is an urgent need for an auxiliary device that can improve the accuracy and efficiency of square pile connections. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary connector and connection method for prestressed concrete square piles, thereby solving the problems of low connection efficiency, poor accuracy, and high cost in existing technologies for prestressed concrete square piles.

[0006] The technical solution adopted by this invention to solve its technical problem is: An auxiliary connector for prestressed concrete square piles includes a clamping assembly formed by bending a steel plate, the interior of which has a groove structure for covering and fixing the end of the lower section of the square pile; a positioning assembly including positioning bolts and positioning holes placed around the clamping assembly, the positioning holes being pre-set in the square pile body, and the positioning bolts being inserted into the pre-set positioning holes in the square pile body; a connecting fastening assembly including a connecting plate and connecting bolts, the connecting bolts passing through the connecting plate and being threadedly connected to the clamping assembly; and a level placed on the outside of the clamping assembly for assisting in calibrating the verticality of the pile body.

[0007] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a complete square pile docking and positioning system through the organic cooperation of clamping components, positioning components, connecting and fastening devices, and a level. It eliminates the traditional welding connection mode that requires multiple workers to work together and repeatedly align the piles. Through the guiding role of the positioning components and the temporary fixing function of the clamping components, a single person can complete the docking and calibration of the square piles. The connection time of a single pile section can be reduced by more than 50%, which significantly improves the construction progress and reduces the personnel configuration requirements for high-altitude or narrow working surfaces.

[0008] As a preferred embodiment, a further technical solution of the present invention is: Preferably, the external corner of the clamping component has a hollow structure.

[0009] This invention also discloses a method for connecting prestressed concrete square piles, which is carried out according to the following steps: Step 1: Pre-fabrication of positioning holes. Before the square pile leaves the factory, positioning holes are machined at preset positions on the pile body according to the dimensions of the clamping components. Step 2: Positioning and construction of the next square pile. Complete the pile position layout according to the design requirements, and carry out the hammering construction of the next square pile, controlling the pile top elevation to be 0.5m-1m above the ground. Step 3: Cleaning the ends of the pile; Step 4: Install the clamping assembly. Install the clamping assembly at the end of the lower square pile, 15cm above the pile end, and tighten it with the connecting plate and connecting bolts. Step 5: Hoisting and docking of the upper section of the square pile. Hoist the upper section of the square pile and lower it smoothly into the clamping assembly so that it contacts the end of the lower section of the square pile. Step Six: Install positioning bolts and calibrate verticality. Insert positioning bolts to complete the initial positioning, and use a spirit level to check and adjust the verticality. Step 7: Welding positioning and quality inspection; Step 8: Clamping component removal and formal welding. Remove the auxiliary connector and complete the formal welding according to the specifications. Step Nine: Hammering of the upper section of the square pile. Hammering operation is carried out, and construction parameters are controlled to ensure that the pile body reaches the design elevation.

[0010] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: Improved construction efficiency: Through the guiding and fixing function of the positioning components, a single person can complete the square pile docking operation, reducing the connection time of a single pile section by more than 50%. Ensuring construction quality: The groove structure works in conjunction with the positioning bolts to ensure that the axial deviation of the upper and lower square pile sections is controlled within 2mm, effectively preventing the pile body from tilting; Reduce overall costs: Reduce rework costs caused by substandard welding quality; the connector can adapt to various specifications of square posts and has good versatility. Easy to operate: The structure is reasonably designed, and it is quick to install and dismantle, making it suitable for efficient operation on construction sites. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Top view; Explanation of reference numerals in the attached drawings: 1. Clamping assembly; 101. U-shaped plate; 102. Groove structure; 103. Hollowed-out design; 2. Positioning bolt; 3. Connecting fastening assembly; 301. Connecting plate; 302. Connecting bolt; 4. Level. Detailed Implementation

[0012] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0013] like Figure 1 , Figure 2 As shown, an auxiliary connector for prestressed concrete square piles consists of a clamping assembly 1, a positioning assembly, a connecting fastening assembly 3, and a level 4.

[0014] The clamping assembly 1 includes two U-shaped plates 101, which are bent from Q235 steel plates. The two U-shaped plates 101 are interlocked to form a groove structure 102 inside for covering and fixing the end of the lower section of the square pile. The external corners of each U-shaped plate 101 are hollowed out 103 to facilitate the precise docking and preliminary positioning welding of the upper and lower sections of the square pile.

[0015] The positioning assembly consists of positioning bolts 2 and positioning holes placed around the clamping assembly 1. The positioning holes are preset on the square pile body, and the positioning bolts 2 are inserted into the positioning holes preset on the square pile body.

[0016] The fastening assembly 3 consists of a connecting plate 301 and connecting bolts 302. After the two U-shaped plates 101 of the clamping assembly 1 are fastened together, a connecting plate 301 is respectively set on the outer side of the connection between the two U-shaped plates 101. Each connecting plate 301 has connecting bolts 302 at both ends, which pass through the connecting plate 301 and are threadedly connected to their respective U-shaped plates 101. The two U-shaped plates 101 are connected into a whole (i.e., the clamping assembly 1) through the cooperation of the connecting plate 301 and the connecting bolts 302.

[0017] A set of horizontal rulers is installed on the outside of any U-shaped plate 101. The set of horizontal rulers consists of a horizontal ruler 4 in the horizontal direction and a vertical ruler 4 in the vertical direction. The two horizontal rulers 4 are used to assist in calibrating the verticality of the pile body.

[0018] Based on the above structure, a method for connecting prestressed concrete square piles is carried out according to the following steps: Step 1: Pre-fabrication of positioning holes. Based on the size and specifications of the connecting clamping component 1, positioning holes are precisely machined at the preset positions on the pile body before the prestressed concrete square pile leaves the factory.

[0019] Step 2: Positioning and construction of the next section of square pile. Strictly follow the design drawings to complete the pile position defense line and ensure positioning accuracy. Then carry out the hammering construction of the next section of square pile. During the construction process, it is necessary to accurately control the pile top elevation so that the pile head of the next section of square pile is 0.5m-1m above the ground.

[0020] Step 3: Cleaning the pile ends. Use a wire brush or sandpaper to clean the ends of the upper and lower sections of the square piles to be connected, thoroughly removing any laitance, rust, and other debris. Ensure the contact surfaces at the pile ends are flat and clean to prevent residual impurities from affecting the tightness of the pile connection and structural stability.

[0021] Step 4: Install clamping component 1. Install clamping component 1 at the end of the next section of square pile, making it 15cm higher than the end of the square pile. Use connecting plate 301 to assemble and tighten clamping component 1 to ensure that clamping component 1 fits tightly with the end of the square pile.

[0022] Step 5: Lifting and connecting the upper section of the square pile. Use the lifting equipment to lift the upper section of the square pile steadily. During the lifting process, operate slowly to avoid the pile body swaying. Make preliminary adjustments to the upper section of the square pile so that the central axes of the pile bodies of the upper and lower sections are basically aligned. Then slowly lower the upper section of the square pile so that it falls steadily into the groove structure 102 of the clamping component 1 until the end of the upper section of the square pile makes precise contact with the end of the lower section of the square pile.

[0023] Step Six: Installation and Verticality Calibration of Positioning Bolts 2. Insert positioning bolts 2 one by one into the pre-set positioning holes of the pile body from the positioning holes on both sides of the clamping component 1 to complete the initial positioning of the upper and lower square piles. At this time, the verticality of the pile body needs to be carefully checked with a spirit level 4. If a deviation is found, the position of the upper pile body can be finely adjusted through the positioning bolts 2 until the verticality of the pile body fully meets the requirements of the construction specifications.

[0024] Step 7: Welding Positioning and Quality Inspection. After a comprehensive inspection of the alignment of the upper and lower square piles and the verticality of the pile body, and confirming that all parameters meet the design standards, the upper and lower square piles are welded and positioned by using the hollowed-out position of the ram's horn of clamping component 1.

[0025] Step 8: Dismantle and formally weld clamping component 1. After the positioning welding is completed and the quality is qualified, select the connecting bolt 302, remove the connecting plate 301, and dismantle the auxiliary connector as a whole. Then, in accordance with the construction specifications and design requirements, formally weld the ends of the upper and lower square piles. During the welding process, it is necessary to control the welding parameters to ensure that the weld is full and uniform, and to ensure that the joint welding quality meets the structural load-bearing requirements.

[0026] Step Nine: Hammering Construction of the Upper Square Pile. Based on design requirements and established technical parameters, hammer the upper square pile section that has been butt-welded. During construction, the hammering force and frequency must be strictly controlled, and the pile settlement must be monitored in real time to ensure the upper square pile is accurately constructed to the design elevation. Simultaneously, damage to the pile or elevation deviation due to improper construction operations must be avoided.

[0027] This invention, through the precise guidance of the positioning components and the rapid fixing of the fastening device, allows a single person to complete the connection operation, reducing the connection time of a single pile section by more than 50% and significantly improving construction efficiency. It effectively ensures the overall verticality of the square pile and the welding quality of the joints. The tight matching between the groove structure and the end of the square pile, as well as the positioning effect of the positioning bolts, ensures that the axial deviation of the upper and lower piles is controlled within 2mm, avoiding pile tilting problems. It reduces overall costs, minimizes rework costs caused by substandard welding quality, and the connector can be flexibly adjusted according to the size of the square pile, making it suitable for various specifications of prestressed concrete square piles and improving the equipment's versatility.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. An auxiliary connector for prestressed concrete square piles, characterized in that, include: The clamping assembly is made of bent steel plate, and the interior of the clamping assembly has a groove structure for covering and fixing the end of the lower square pile. The positioning component includes positioning bolts and positioning holes placed around the clamping component. The positioning holes are pre-set in the square pile body, and the positioning bolts are inserted into the positioning holes pre-set in the square pile body. A fastening assembly is provided, comprising a connecting plate and a connecting bolt, the connecting bolt passing through the connecting plate and threadedly connected to the clamping assembly. A spirit level is placed on the outside of the clamping assembly to help calibrate the verticality of the pile.

2. The auxiliary connector for prestressed concrete square piles according to claim 1, characterized in that: The external corner of the clamping component has a hollow structure.

3. A method for connecting prestressed concrete square piles, characterized in that, The auxiliary connector for prestressed concrete square piles as described in any one of claims 1 to 2 shall be performed according to the following steps: Step 1: Pre-fabrication of positioning holes. Before the square pile leaves the factory, positioning holes are machined at preset positions on the pile body according to the dimensions of the clamping components. Step 2: Positioning and construction of the next square pile. Complete the pile position layout according to the design requirements, and carry out the hammering construction of the next square pile, controlling the pile top elevation to be 0.5m-1m above the ground. Step 3: Cleaning the ends of the pile; Step 4: Install the clamping assembly. Install the clamping assembly at the end of the lower square pile, 15cm above the pile end, and tighten it with the connecting plate and connecting bolts. Step 5: Hoisting and docking of the upper section of the square pile. Hoist the upper section of the square pile and lower it smoothly into the clamping assembly so that it contacts the end of the lower section of the square pile. Step Six: Install positioning bolts and calibrate verticality. Insert positioning bolts to complete the initial positioning, and use a spirit level to check and adjust the verticality. Step 7: Welding positioning and quality inspection; Step 8: Clamping component removal and formal welding. Remove the auxiliary connector and complete the formal welding according to the specifications. Step Nine: Hammering of the upper section of the square pile. Hammering operation is carried out, and construction parameters are controlled to ensure that the pile body reaches the design elevation.

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