Stable centering method for pile tip in tubular pile construction

Abstract

The invention relates to the technical field of tubular pile construction, in particular to a stable centering method for a pile tip in tubular pile construction. The method comprises the following specific steps that S1, the two bases are symmetrically arranged; s2, an adjusting mechanism is arranged on each base; s3, two transverse rods are erected between the adjusting mechanisms in parallel; s4, two limiting rods perpendicular to the transverse rods are arranged on the two transverse rods in a crossing mode; s5, the pile tip is placed on the two transverse rods and between the two limiting rods; s6, the two limiting rods slide in the length direction of the transverse rod; s7, sliding blocks at the two ends of a limiting rod are fixed to a transverse rod; s8, a pile machine is operated to press down the pipe pile, so that an end plate of the pipe pile is centered and contacted with the top end of the pile tip; and S9, welding operation is conducted on the joint part between the tubular pile end plate and the top end of the pile tip. A pile tip is converted from a ground manual supporting state into a reliable positioning and posture adjustment on the system, and before a pile machine presses a pipe pile downwards for centering, stable pre-positioning of the pile tip at a reasonable height can be completed through operation of a single person.

Description

Technical Field

[0001] This invention relates to the field of pipe pile construction technology, specifically a method for stabilizing and centering the pile tip during pipe pile construction. Background Technology

[0002] Before the pile driver is in place, the pile tip is pre-positioned and temporarily stabilized. The specific operation involves two workers manually supporting the pile tip and inserting it into the surface soil to keep it upright. Then, the pile driver is operated to press down on the pipe pile, attempting to align the pipe pile end plate with the manually supported pile tip. This process relies entirely on visual observation and manual adjustment. Due to the low position of the pile tip, alignment efficiency is low, and the pile tip is prone to displacement and wobbling in the soil and under manual support. Inaccurate alignment often leads to poor contact between the pipe pile end plate and the pile tip, requiring repeated lifting, pressing, and adjustment. This is not only time-consuming and labor-intensive but also creates a dangerous operating space between the heavy downward pressure of the pipe pile and the instability of manual support, posing a serious safety hazard of pinching workers' hands. Furthermore, manual support makes it difficult to ensure the verticality of the pile tip, and the bottom of the pile tip is easily covered by soil (i.e., "mud trapping"), which affects the quality of the subsequent welded base and introduces potential defects to the reliability of the pile foundation connection.

[0003] Therefore, current processes face significant challenges in the initial connection between the pile tip and the pipe pile, including high reliance on manual labor, poor operational safety, low alignment efficiency, and difficulty in guaranteeing accuracy. The industry urgently needs auxiliary equipment and methods to replace manual support and achieve rapid, stable, and precise positioning of the pile tip, thereby fundamentally eliminating safety risks in this stage and improving construction quality and efficiency. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for stabilizing and centering the pile tip in the construction of pipe piles, which improves construction quality and efficiency.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A method for stabilizing and centering the pile tip during pipe pile construction, the specific steps of which are as follows:

[0007] S1: Two bases are symmetrically arranged on the construction surface and on both sides of the pipe pile.

[0008] S2: An adjustment mechanism for adjusting the support height is provided on each base.

[0009] S3: Two horizontal bars are installed in parallel between the adjustment mechanisms, so that both ends of each horizontal bar are supported and fixed with adjustable height.

[0010] S4: Two limiting rods perpendicular to the two horizontal bars are installed across the two horizontal bars. The two ends of the limiting rods are slidably connected to the horizontal bars by sliders.

[0011] S5: Place the pile tip on the two horizontal bars, in the area between the two limit bars.

[0012] S6: Slide the two limiting rods along the length of the crossbar so that the two limiting rods move to both sides of the pile tip along that direction.

[0013] S7: Fix the sliders at both ends of the limiting rod to the crossbar respectively, so that the two limiting rods clamp and limit the pile tip placed on the crossbar from both sides.

[0014] S8: With the pile tip clamped and limited by the limiting rod, operate the pile driver to press down the pipe pile, so that the pipe pile end plate is aligned and in contact with the top of the pile tip.

[0015] S9: Maintain the clamping and limiting state of the limit rod on the pile tip, and perform welding operations on the joint between the pipe pile end plate and the top of the pile tip.

[0016] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0017] By constructing a mechanical support and clamping system with height and angle adjustment capabilities at a preset location, the pile tip is transformed from being manually supported on the ground to being reliably positioned and adjusted on the system. Before the pile driver presses the pipe pile for centering, a single person can complete the stable pre-positioning of the pile tip at a reasonable height. The vertical state or required inclination angle of the pile tip can be precisely controlled by adjusting the system, thereby effectively avoiding the risks and uncertainties of manual support, reducing centering adjustment time and repeated operations, and providing stable interface conditions with accurate position and clean base for subsequent high-quality welding.

[0018] As a preferred embodiment, a further technical solution of the present invention is:

[0019] Preferably, the adjustment mechanism includes a square tube fixed longitudinally to the base, a support block slidingly passing through an opening at the top of the square tube, a slot for placing a crossbar at the top of the support block, an opening on the back side of the square tube into which a wedge can be inserted, a sloped bottom of the support block, and the sloped surface of the wedge contacting the sloped bottom of the support block. A locking nut is fixed on the side wall of the square tube, and a first locking bolt is screwed onto the locking nut, passing through the square tube and abutting against the support block. Through the cooperation of the sloped bottom of the support block and the sloped surface of the wedge, and the synergistic effect of the lateral locking bolt, stepless and reversible adjustment of the height of the support block is achieved. This not only enables the adjustment of the support height to have both rapid coarse adjustment and fine fine adjustment capabilities, but also makes it possible to accurately adjust the posture of the pile tip by independently controlling the height of each support point to achieve the principle of leveling the support plane or setting the inclination angle, thus enhancing the adaptability of the system to different construction requirements.

[0020] Preferably, in step S4, the slider has a slot that matches the cross-sectional shape of the crossbar. The slider and the crossbar are slidably connected through the slot. The slider and slot structure provides a basis for the smooth sliding and reliable guidance of the limiting rod on the crossbar, which makes it easy for construction personnel to move the limiting rod to the predetermined clamping position quickly and smoothly. This is a key link to ensure that the pile tip is quickly and accurately limited on the adjustable support plane.

[0021] Preferably, the slider has a threaded hole with the axis of the threaded hole facing the crossbar. A second locking bolt is screwed into the threaded hole. Tightening the second locking bolt so that its end abuts against the crossbar will fix the slider and the limiting rod to the crossbar. The threaded locking method provides a firm mechanical fixation for the limiting rod after sliding adjustment. It has a large locking force and good self-locking performance, which can effectively resist the vibration and lateral force that may be generated during the subsequent pile pressing and welding process, and ensure that the position and posture of the pile tip remain unchanged throughout the entire key process after it is clamped and limited. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main view structure in an embodiment of the present invention;

[0023] Figure 2 This is a top view of the structure in an embodiment of the present invention;

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 2. Horizontal bar; 3. Limiting rod; 4. Square tube; 5. Support block; 6. Wedge block; 7. First locking bolt; 8. Sliding block; 9. Second locking bolt. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 2 As shown in the figure, this embodiment provides a method for stabilizing and centering the pile tip during pipe pile construction. The specific steps are as follows:

[0027] S1: Two bases 1 are symmetrically arranged on the construction surface and on both sides of the pipe pile. The bases 1 can be welded from steel plates or structural steel. The bottom of the bases should be kept flat to ensure stable placement. The bases 1 are pre-set with connecting structures or planes for installing and fixing subsequent adjustment mechanisms.

[0028] S2: An adjustment mechanism for adjusting the support height is provided on each base 1. The crossbar 2 is a rod with a certain rigidity and load-bearing capacity. Its length is determined according to the maximum diameter of the pile tip to be clamped, and is usually longer than the diameter of the pile tip.

[0029] S3: Two horizontal bars 2 are installed in parallel between the adjustment mechanisms, so that both ends of each horizontal bar 2 are supported and fixed with adjustable height.

[0030] S4: Two limiting rods 3 perpendicular to the two horizontal bars 2 are set across the two horizontal bars 2. The two ends of the limiting rods 3 are slidably connected to the horizontal bars 2 through sliders 8.

[0031] S5: Place the pile tip on the area between the two horizontal bars 2 and the two limiting bars 3.

[0032] S6: Slide the two limiting rods 3 along the length of the crossbar 2, so that the two limiting rods 3 move to both sides of the pile tip along that direction.

[0033] S7: Fix the sliders 8 at both ends of the limiting rod 3 to the crossbar 2 respectively, so that the two limiting rods 3 clamp and limit the pile tip placed on the crossbar 2 from both sides.

[0034] S8: With the pile tip clamped and limited by the limiting rod 3, operate the pile driver to press down the pipe pile, so that the pipe pile end plate is aligned and in contact with the top of the pile tip.

[0035] S9: Maintain the clamping and limiting state of the limit rod 3 on the pile tip, and carry out welding operation on the joint between the pipe pile end plate and the top of the pile tip. This welding is the initial welding. After the initial welding is completed, the limit rod 3 and the crossbar 2 can be removed and the pipe pile can be raised to fully weld the pile tip.

[0036] Preferably, the adjusting mechanism includes a square tube 4 longitudinally fixed to the base 1. The square tube 4 is a hollow steel tube with a rectangular cross-section, fixed to the base 1 by welding or bolts. A support block 5 slides through the opening at the top of the square tube 4. The support block 5 is a rectangular steel block that matches the cross-section of the inner cavity of the square tube 4, and its height is greater than the wall thickness of the square tube 4. The top of the support block 5 is provided with a slot for placing a crossbar 2. The back side of the square tube 4 is provided with an opening into which a wedge 6 can be inserted. The wedge 6 is a trapezoidal steel block with an inclined surface. The inclination angle of its inclined surface is consistent with the bottom inclined surface of the support block 5. The bottom of the support block 5 is an inclined surface, and the inclined surface of the wedge 6 is consistent with the bottom inclined surface of the support block 5. The bottom inclined surface of the square tube 4 is in contact with the support block 5. A locking nut is fixed on the side wall of the square tube 4. A first locking bolt 7 is screwed onto the locking nut, which penetrates the square tube 4 and abuts against the support block 5. Through the cooperation between the bottom inclined surface of the support block 5 and the inclined surface of the wedge block 6, as well as the synergistic effect of the lateral locking bolt, the stepless and reversible adjustment of the height of the support block 5 is realized. This not only enables the adjustment of the support height to have both rapid coarse adjustment and fine fine adjustment capabilities, but also makes it possible to accurately adjust the posture of the pile tip by independently controlling the height of each support point to achieve the principle of leveling the support plane or setting the inclination angle. This enhances the adaptability of the system to different construction requirements.

[0037] Preferably, in step S4, the slider 8 has a slot that matches the cross-sectional shape of the crossbar 2. The slider 8 and the crossbar 2 are slidably connected through the slot. The slider 8 and the slot structure provide a basis for the smooth sliding and reliable guidance of the limiting rod 3 on the crossbar 2, which makes it easy for construction personnel to move the limiting rod 3 to the predetermined clamping position quickly and smoothly. This is a key link to ensure that the pile tip is quickly and accurately limited on the adjustable support plane.

[0038] Preferably, the slider 8 has a threaded hole with the axis of the threaded hole facing the crossbar 2. A second locking bolt 9 is screwed into the threaded hole. Tightening the second locking bolt 9 so that its end abuts against the crossbar 2 will fix the slider 8 and the limiting rod 3 to the crossbar 2. The threaded locking method provides a firm mechanical fixation for the limiting rod 3 after sliding adjustment. It has a large locking force and good self-locking performance, which can effectively resist the vibration and lateral force that may be generated during the subsequent pressing down of the pipe pile and welding process, and ensure that the position and posture of the pile tip remain unchanged throughout the entire key process after being clamped and limited.

[0039] By constructing a mechanical support and clamping system with height and angle adjustment capabilities at a preset location, the pile tip is transformed from being manually supported on the ground to being reliably positioned and adjusted on the system. Before the pile driver presses the pipe pile for centering, a single person can complete the stable pre-positioning of the pile tip at a reasonable height. The vertical state or required inclination angle of the pile tip can be precisely controlled by adjusting the system, thereby effectively avoiding the risks and uncertainties of manual support, reducing centering adjustment time and repeated operations, and providing stable interface conditions with accurate position and clean base for subsequent high-quality welding.

[0040] The above description is merely a preferred embodiment of the present invention and does not limit the scope of the present 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. A method for stabilizing and centering a pile tip in tubular pile construction, characterized by: The specific steps are as follows: S1: two bases are symmetrically arranged on the construction surface and located on both sides of the pipe pile; S2: an adjusting mechanism for adjusting the support height is arranged on each base; S3: two horizontal rods are horizontally arranged between the adjusting mechanisms, so that each horizontal rod is supported and fixed at both ends with adjustable height; S4: two limiting rods perpendicular to the horizontal rods are arranged across the two horizontal rods, and the two ends of the limiting rods are respectively connected with the horizontal rods through sliding blocks; S5: the pile tip is placed in the area between the two horizontal rods and between the two limiting rods; S6: the two limiting rods are slid along the length direction of the horizontal rods, so that the two limiting rods are respectively moved to both sides of the pile tip in the direction; S7: the sliding blocks at both ends of the limiting rods are respectively fixed with the horizontal rods, so that the two limiting rods form clamping limiting to the pile tip placed on the horizontal rods from both sides; S8: in the state that the pile tip is clamped and limited by the limiting rods, the pipe pile is pressed down by operating the pile machine, so that the pipe pile end plate is centered and contacted with the top end of the pile tip; S9: the clamping and limiting state of the limiting rods to the pile tip is maintained, and the welding work is performed on the joint between the pipe pile end plate and the top end of the pile tip.

2. The method for stabilizing and centering the point of a pipe pile during pile construction according to claim 1, characterized in that: The adjusting mechanism comprises a square tube fixed longitudinally on the base, a support block slidingly penetrating the opening at the top of the square tube, a placing groove of the horizontal rod being arranged at the top of the support block, an opening being arranged at the back side of the square tube, a wedge block being insertable in the opening, the bottom of the support block being inclined, the inclined surface of the wedge block being in contact with the bottom inclined surface of the support block, a locking nut being fixed on the side wall of the square tube, and a first locking bolt penetrating the square tube and abutting against the support block being screwed on the locking nut.

3. The method for stabilizing and centering the point of a pipe pile during pile construction according to claim 1, characterized in that: In step S4, the sliding block has a clamping groove matched with the cross-sectional shape of the horizontal rod, and the sliding block and the horizontal rod are slidably connected through the clamping groove.

4. The method for stabilizing and centering the point of a pipe pile during pile construction according to claim 3, characterized in that: A threaded hole is arranged on the sliding block, the axis direction of the threaded hole is towards the horizontal rod, a second locking bolt is screwed in the threaded hole, and the sliding block and the limiting rod are fixed on the horizontal rod by tightening the end of the second locking bolt against the horizontal rod.

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