Steel trestle steel pipe pile construction limiting device

Abstract

This invention discloses a limiting device for steel pipe pile construction of a steel trestle bridge, relating to the field of steel pipe pile construction. It includes an I-beam, with one end mounted on a load-bearing beam and the other end extending outwards to mount a support platform. It also includes an angle adjustment unit mounted on the top of the support platform. The angle adjustment unit comprises a movable frame and side support plates. The movable frame is hinged to the top of the support platform via a drive shaft, and a side support plate is fixedly mounted on the bottom of one side of the movable frame in the width direction. This limiting device for steel pipe pile construction of a steel trestle bridge forms a cantilever construction foundation by mounting one end of the I-beam to a load-bearing beam and the other end to a support platform. An angle adjustment unit, consisting of a movable frame hinged to a drive shaft and a side support plate, is set on the top of the support platform. A telescopic drive unit drives the movable frame to rotate around the drive shaft to switch between vertical and inclined states.

Description

Technical Field

[0001] This invention relates to steel pipe pile construction technology, specifically to a limiting device for steel pipe pile construction on a steel trestle bridge. Background Technology

[0002] During the construction of steel pipe piles for steel trestle bridges, when driving inclined steel pipe piles, a cantilevered limiting device fixed to the load-bearing beam is usually needed to guide the steel pipe piles into the foundation at a predetermined design angle. Existing construction limiting devices generally consist of an I-beam cantilever beam, a support platform, a guide frame, and a clamping mechanism. One end of the I-beam is anchored to the laid load-bearing beam, while the other end extends and cantilevers to support the guide platform. An adjustable tilt angle movable frame and lateral support plates are used to limit and guide the steel pipe piles.

[0003] However, in actual construction, the steel pipe piles used for inclined piles are generally quite heavy, with a single pile section weighing several tons to over ten tons. When the steel pipe pile slides and sinks along the guide surface of the side support plate in an inclined state, most of its weight is converted into lateral pressure acting on the side support plate and the cantilevered end of the support platform. Since I-beams are slender cantilever bending members, under heavy lateral loads, the I-beams and the support platform welded to them will inevitably undergo elastic bending and torsional deformation. This deformation directly causes a slight angular shift in the movable frame and side support plate, which were originally adjusted and positioned according to the design inclination angle. This results in a cumulative deviation between the actual pile driving direction and the designed inclination angle, affecting the overall load-bearing distribution and structural safety of the pile foundation group. Summary of the Invention

[0004] The purpose of this invention is to provide a limiting device for the construction of steel pipe piles for steel trestle bridges, in order to solve the problem in the prior art where, during the construction of inclined steel pipe piles, the excessive weight of the steel pipe piles causes elastic deformation of the I-beam cantilever beam and the support platform, resulting in a dynamic shift of the preset tilt angle of the movable frame, which in turn affects the accuracy of the pile driving angle.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe pile construction limiting device for a steel trestle bridge, comprising an I-beam, one end of which is installed on a load-bearing beam, and the other end extending outward and mounting a support platform, and further comprising:

[0006] An angle adjustment unit is installed on the top of the support platform. The angle adjustment unit includes a movable frame and a side support plate. The movable frame is hinged to the top of the support platform through a drive shaft. A side support plate is fixedly installed on the bottom of one side of the movable frame in the width direction.

[0007] A telescopic drive unit is mounted on a support platform, and the telescopic drive unit is used to drive the movable frame to rotate around the transmission shaft axis.

[0008] A clamping unit, symmetrically mounted on the movable frame, includes a clamping plate and a third linear drive component.

[0009] The fixed end of the third linear drive component is fixedly installed on the movable frame;

[0010] The outer wall of the clamping plate is fixedly installed on the output end of the third linear drive component, and the clamping plate is located inside the movable frame. The symmetrically arranged clamping plates are used to clamp the steel pipe pile.

[0011] An opening is formed at the bottom of the support platform, through which the steel pipe piles can extend to the ground.

[0012] Furthermore, a guide plate is fixedly installed on the side of the side support plate facing the opening.

[0013] Furthermore, the guide plate is arc-shaped on the side facing the opening.

[0014] Furthermore, the telescopic drive unit includes a first linear drive member, which is arranged at an angle. One end of the first linear drive member is hinged to the top of the support platform, and the other end of the first linear drive member is hinged to the outer wall of the movable frame.

[0015] Furthermore, the telescopic drive unit also includes a second linear drive member, which is arranged at an angle. One end of the second linear drive member is hinged to the top of the support platform, and the other end of the second linear drive member is hinged to one side of the side support plate.

[0016] Furthermore, a guide rod is fixedly installed on the outer wall of the clamping plate. The guide rod passes through the side wall of the movable frame and is slidably connected to the part of the movable frame through which it passes.

[0017] Furthermore, the clamping plate is arc-shaped on the side facing the middle of the movable frame.

[0018] Furthermore, the movable frame is located above the opening.

[0019] Compared with existing technologies, the present invention provides a steel pipe pile construction limiting device for steel trestle bridges. This device forms a cantilever construction foundation by installing one end of an I-beam onto a load-bearing beam and a support platform at the other end. An angle adjustment unit is constructed on the top of the support platform, consisting of a movable frame hinged to a drive shaft and side support plates. A telescopic drive unit drives the movable frame to rotate around the drive shaft, switching between vertical and inclined states. A clamping unit symmetrically installed on the movable frame uses a third linear drive component to drive a clamping plate to clamp and limit the steel pipe pile, with an opening for the pile to pass through. When inclined steel pipe pile construction is underway and the I-beam undergoes elastic deformation due to the pile's own weight, causing a deviation in the preset inclination angle, the third linear drive component drives the clamping plate to first clamp and fix the pile to the movable frame. Then, the telescopic drive unit drives the movable frame, along with the clamped pile, to rotate around the drive shaft for angle compensation adjustment. This eliminates the angle error caused by the elastic deformation of the I-beam, ensuring that the final pile driving angle matches the designed inclination angle, thus improving the accuracy and quality of inclined steel pipe pile construction. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a first schematic diagram of the overall structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a second schematic diagram of the overall structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a third schematic diagram of the overall structure provided in an embodiment of the present invention;

[0024] Figure 4 This is a first schematic cross-sectional view of the overall structure provided in an embodiment of the present invention;

[0025] Figure 5 This is a second schematic cross-sectional view of the overall structure provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. I-beam; 2. Support platform; 3. Angle adjustment unit; 31. Movable frame; 32. Side support plate; 33. Guide plate; 4. Telescopic drive unit; 41. First linear drive component; 42. Second linear drive component; 5. Clamping unit; 51. Clamping plate; 52. Third linear drive component; 53. Guide rod; 6. Drive shaft; 7. Opening. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] As attached Figure 1 To be continued Figure 5 As shown:

[0030] This invention provides a limiting device for the construction of steel pipe piles for steel trestle bridges, including an I-beam 1, one end of which is installed on a load-bearing beam, and the other end extends outward and is fitted with a support platform 2. It also includes:

[0031] Angle adjustment unit 3 is installed on the top of support platform 2. Angle adjustment unit 3 includes movable frame 31 and side support plate 32. Movable frame 31 is hinged to the top of support platform 2 through transmission shaft 6. Side support plate 32 is fixedly installed on the bottom of one side of movable frame 31 in the width direction.

[0032] Telescopic drive unit 4 is mounted on support platform 2. Telescopic drive unit 4 is used to drive movable frame 31 to rotate around the axis of drive shaft 6.

[0033] The clamping unit 5 is symmetrically mounted on the movable frame 31. The clamping unit 5 includes a clamping plate 51 and a third linear drive member 52.

[0034] The fixed end of the third linear drive component 52 is fixedly installed on the movable frame 31;

[0035] The clamping plate 51 is fixedly installed on the outer wall of the third linear drive 52 at the output end, and the clamping plate 51 is located inside the movable frame 31. The symmetrically arranged clamping plates 51 are used to clamp the steel pipe pile.

[0036] The opening 7 is located at the bottom of the support platform 2, through which steel pipe piles can extend to the ground.

[0037] The H-beam 1 is hot-rolled from Q355B low-alloy high-strength structural steel. This material has a yield strength of 355MPa and a tensile strength of 450MPa to 630MPa, exhibiting good impact resistance and fatigue resistance, and can withstand the dynamic and vibration loads generated during steel pipe pile construction. One end of the H-beam 1 is fixed to the load-bearing beam of the steel trestle bridge via high-strength bolts or welding, while the other end extends outward and is welded to and fixed to the support platform 2. The support platform 2 is welded from Q235B carbon structural steel plate, with a yield strength of 235MPa. This material has good plasticity and weldability, and can be used as a stable construction operation platform.

[0038] An angle adjustment unit 3 is installed on the top of the support platform 2. The angle adjustment unit 3 includes a movable frame 31 and a side support plate 32. The movable frame 31 is made of Q355B channel steel or steel plate and is welded together. The bottom of the movable frame 31 is hinged to the top of the support platform 2 via a drive shaft 6. The drive shaft 6 is made of 45 steel, which is a high-quality carbon structural steel. After quenching and tempering, it has good comprehensive mechanical properties and high torsional strength, and can reliably transmit the torque load during the rotation of the movable frame 31. A side support plate 32 is welded and fixedly installed on the bottom of one side of the movable frame 31 in the width direction. The side support plate 32 is also made of Q355B steel plate and is used to provide lateral support and angle guidance when the movable frame 31 is tilted.

[0039] The telescopic drive unit 4 is mounted on the support platform 2. It drives the movable frame 31 to rotate around the transmission shaft 6 to switch between vertical and inclined positions. The telescopic drive unit 4 includes a first linear drive component 41, which is an HSG type double-acting engineering hydraulic cylinder. The cylinder diameter is calculated and selected based on the total weight of the movable frame 31 and the steel pipe pile; commonly used cylinder diameters range from 80mm to 125mm, and the piston rod diameter ranges from 45mm to 70mm. The rated working pressure is 16MPa. The first linear drive component 41 is inclined between the support platform 2 and the movable frame 31. Its cylinder bottom is hinged to the top of the support platform 2 via a hinge seat, and the piston rod top is hinged to the outer wall of the movable frame 31 via a hinge seat. The hinge seat is made of 45 steel and has an embedded self-lubricating copper bushing bearing to reduce frictional resistance. By providing hydraulic power through a hydraulic pump station to drive the piston rod to extend and retract, the angle of the movable frame 31 can be infinitely adjusted.

[0040] The clamping unit 5 is symmetrically mounted on the movable frame 31. The clamping unit 5 includes a clamping plate 51 and a third linear drive component 52. The clamping plate 51 is made of Q355B steel plate through arc bending to improve the clamping contact area and limiting accuracy. The third linear drive component 52 uses a servo electric cylinder, which converts rotational motion into linear motion by driving the lead screw through a servo motor, achieving precise control over the extension length of the clamping plate 51. The fixed end of the third linear drive component 52 is bolted to the outer wall of the movable frame 31, and the outer wall of the clamping plate 51 is bolted to the output end of the third linear drive component 52, with the clamping plate 51 located inside the movable frame 31. The two symmetrically arranged clamping plates 51 move closer or further apart under the drive of the third linear drive component 52, clamping the steel pipe pile to achieve limiting and guiding the steel pipe pile.

[0041] The opening 7 is drilled through the bottom of the support platform 2. The diameter of the opening 7 is larger than the outer diameter of the steel pipe pile, allowing the steel pipe pile to pass through the opening 7 and extend to the ground for pile driving. The movable frame 31 is located directly above the opening 7. The center line of the inner opening of the movable frame 31 coincides with the center line of the opening 7 in a vertical position, ensuring that the steel pipe pile can be accurately inserted into the ground through the opening 7 after being limited by the clamping plate 51 after passing through the movable frame 31.

[0042] When vertical pile construction is required, one end of the I-beam 1 is first fixed to the already laid load-bearing beam. The support platform 2 is then lifted and positioned using lifting equipment, and its position is fixed. The first linear drive component 41 of the telescopic drive unit 4 retracts, driving the movable frame 31 to rotate around the transmission shaft 6 until the central axis of the movable frame 31 is perpendicular to the top surface of the support platform 2. At this point, the movable frame 31 is in a vertical working state, with its inner opening facing upwards and directly above the opening 7. The steel pipe pile is vertically lifted using the lifting equipment and sequentially inserted into the ground through the inner side of the movable frame 31 and the opening 7. The clamping plate 51 is moved by the third linear drive component 52 to position the steel pipe pile, ensuring that it can only pass through the space between the symmetrically arranged clamping plates 51, thus achieving the limiting and guiding of the vertical steel pipe pile.

[0043] When inclined pile construction is required, the piston rod of the first linear drive component 41 extends, driving the movable frame 31 to rotate around the transmission shaft 6, causing the side support plate 32 and clamping unit 5 to switch from a vertical state to an inclined state until the designed angle is reached. The steel pipe pile is lifted using lifting equipment and, guided by the inclined side support plate 32 and the limiting channel of the clamping plate 51 inserted inside the movable frame 31, is inserted downwards through the opening 7 into the ground. Due to the large self-weight of the steel pipe pile, the lateral pressure exerted on the side support plate 32 during inclined pile construction causes the construction limiting device, especially the I-beam 1, to undergo a certain elastic deformation, resulting in a deviation from the preset inclination angle of the steel pipe pile. To address this technical problem, the core correction mechanism of this invention is as follows: First, the output end of the third linear drive 52 extends, driving the clamping plate 51 to clamp the side wall of the steel pipe pile, temporarily fixing the steel pipe pile and the movable frame 31 into one unit; then, the first linear drive 41 drives the movable frame 31 to rotate around the transmission shaft 6, driving the clamped steel pipe pile to precisely adjust the deflection angle; after the angle adjustment is completed, the third linear drive 52 retracts to release the locking of the steel pipe pile, and the steel pipe pile can continue to move accurately downward along the inclined direction of the side support plate 32, completing the limiting construction of the inclined steel pipe pile.

[0044] In one embodiment of the present invention, a guide plate 33 is fixedly installed on the side of the side support plate 32 facing the opening 7.

[0045] The guide plate 33 is made of wear-resistant alloy steel plate, specifically NM400 or NM450 wear-resistant steel plate. The guide plate 33 is fixed to the inner side of the side support plate 32 by welding. During the construction of the inclined pile, when the movable frame 31 is tilted to the design angle, the steel pipe pile is inserted downward through the inner side of the movable frame 31. The outer wall of the steel pipe pile will contact the guide plate 33. The guide plate 33 provides guidance and orientation for the steel pipe pile. At the same time, the high wear resistance of the guide plate 33 can effectively resist the surface wear caused by repeated friction of the steel pipe pile.

[0046] In one embodiment of the present invention, the guide plate 33 is arc-shaped on the side facing the opening 7.

[0047] The radius of curvature of the arc surface is designed based on the outer diameter of commonly used steel pipe piles. When the steel pipe pile contacts the guide plate 33, the arc surface can form a large contact area with the outer circular surface of the steel pipe pile, effectively dispersing the contact pressure and avoiding stress concentration caused by point contact or line contact. At the same time, the arc surface can play a guiding role in the automatic centering of the steel pipe pile, thereby reducing the deviation and jamming phenomenon during the insertion of the steel pipe pile.

[0048] In one embodiment of the present invention, the telescopic drive unit 4 includes a first linear drive member 41, which is arranged at an angle. One end of the first linear drive member 41 is hinged to the top of the support platform 2, and the other end of the first linear drive member 41 is hinged to the outer wall of the movable frame 31.

[0049] The first linear drive unit 41 adopts an HSG type double-acting engineering hydraulic cylinder. The cylinder diameter is calculated and selected based on the total weight of the movable frame 31 and the steel pipe pile. The commonly used cylinder diameter is 80mm to 125mm, the piston rod diameter is 45mm to 70mm, and the rated working pressure is 16MPa. The first linear drive unit 41 is inclinedly arranged between the support platform 2 and the movable frame 31. The bottom end of the cylinder body of the first linear drive unit 41 is hinged to the top of the support platform 2 through a hinge seat, and the top end of the piston rod of the first linear drive unit 41 is hinged to the top of the support platform 2 through a hinge seat. The connecting seat is hinged to the outer wall of the movable frame 31. The connecting seat is made of 45 steel and has a self-lubricating copper bushing bearing embedded in it to reduce frictional resistance. When it is necessary to adjust the angle of the movable frame 31, the hydraulic pump station supplies oil to the rod chamber or rodless chamber of the first linear drive member 41 to drive the piston rod to extend or retract. The linear motion of the piston rod is converted into the rotational motion of the movable frame 31 around the transmission shaft 6 through the hinged connection at both ends. When the piston rod extends, the upward tilt angle of the movable frame 31 increases, and when the piston rod retracts, the downward tilt angle of the movable frame 31 decreases.

[0050] In one embodiment of the present invention, the telescopic drive unit 4 further includes a second linear drive member 42, which is arranged at an angle. One end of the second linear drive member 42 is hinged to the top of the support platform 2, and the other end of the second linear drive member 42 is hinged to one side of the side support plate 32.

[0051] The second linear drive component 42 uses an HSG type double-acting engineering hydraulic cylinder of the same specifications as the first linear drive component 41. It is inclined between the support platform 2 and the side support plate 32. The bottom end of the cylinder body is hinged to the top of the support platform 2, and the top end of the piston rod is hinged to one side of the side support plate 32. The main function of the second linear drive component 42 is to provide auxiliary support rigidity after the movable frame 31 has completed angle adjustment, enhance the stability of the side support plate 32 when bearing the lateral pressure of the steel pipe pile, and reduce the deformation of the side support plate 32 itself. When active angle correction is required, the second linear drive component 42 is in a floating follow-up state or is adjusted slightly in sync with the first linear drive component 41 to ensure that the movable frame 31 can rotate freely. The core correction power and angle adjustment action are still independently undertaken by the first linear drive component 41. That is, after the clamping plate 51 locks the steel pipe pile, the first linear drive component 41 drives the movable frame 31 and the steel pipe pile to rotate and reset as a whole. The second linear drive component 42 does not interfere with this correction rotation process. The dual-cylinder configuration can significantly improve the overall rigidity and resistance to eccentric loads of the device under normal inclined construction conditions, thereby further ensuring the positioning accuracy and construction safety of the steel pipe pile in the inclined state.

[0052] In one embodiment of the present invention, a guide rod 53 is fixedly installed on the outer wall of the clamping plate 51. The guide rod 53 passes through the side wall of the movable frame 31 and is slidably connected to the part of the movable frame 31 through which it is passed.

[0053] The guide rod 53 is made of 45 steel with a hard chrome plated surface, achieving a surface hardness of HRC55 to HRC60. It has good wear resistance and surface smoothness. The guide rod 53 passes through a through hole opened on the side wall of the movable frame 31. A self-lubricating graphite copper sleeve sliding bearing or linear rolling bearing is press-fitted into the through hole. The guide rod 53 and the sliding bearing at the point through which the movable frame 31 is penetrated form a sliding fit. When the third linear drive 52 drives the clamping plate 51 to move, the guide rod 53 slides synchronously along the axial direction of the through hole on the side wall of the movable frame 31 under the guidance of the sliding bearing. The main function of the guide rod 53 is to provide lateral support and guidance for the clamping plate 51, counteract the lateral reaction force generated by the steel pipe pile on the clamping plate 51, and prevent the clamping plate 51 from deflecting or tilting when under force. This ensures that the clamping plate 51 always moves parallel to the side wall of the movable frame 31, thereby improving the clamping accuracy and limiting reliability of the steel pipe pile.

[0054] In one embodiment of the invention, the clamping plate 51 is arc-shaped on the side facing the middle of the movable frame 31.

[0055] The arc-shaped surface is formed by CNC bending or machining, and its radius of curvature is designed according to the outer diameter of commonly used steel pipe piles. When the two symmetrically arranged clamping plates 51 clamp and limit the steel pipe pile, the two arc-shaped surfaces together form an arc-shaped limiting channel that matches the outer circle of the steel pipe pile. The arc-shaped surface forms a large surface contact area with the outer wall of the steel pipe pile, which can effectively reduce the local compressive stress on the contact surface and avoid stress concentration caused by point contact or line contact, which could damage the anti-corrosion coating on the surface of the steel pipe pile. At the same time, the arc-shaped surface can automatically center and guide the steel pipe pile during the clamping process, so that the steel pipe pile is naturally located in the exact center position of the two clamping plates 51, further improving the limiting accuracy and construction quality.

[0056] In one embodiment of the present invention, the movable frame 31 is located above the opening 7.

[0057] The center line of the inner opening of the movable frame 31 coincides with the center line of the opening 7 in a vertical position. When the movable frame 31 is vertical, the steel pipe piles are inserted into the ground sequentially through the clamping plate 51 limiting channel inside the movable frame 31 and the opening 7. After passing through the movable frame 31, the steel pipe piles can fall directly aligned with the opening 7, reducing the swing amplitude of the steel pipe piles in a free-suspension state. When the movable frame 31 is tilted, the steel pipe piles need to pass through the opening 7 after passing through the inner side of the movable frame 31. Due to the arrangement of the movable frame 31 directly above the opening 7, the falling path of the steel pipe piles in the tilted state can still maintain alignment with the opening position of the opening 7. It is only necessary to adjust the insertion position of the steel pipe piles appropriately according to the tilt angle to achieve smooth passage. This ensures that the device can effectively realize the limiting and guiding function in both vertical pile construction and tilted pile construction conditions, guaranteeing the accuracy and construction efficiency of steel pipe pile driving.

[0058] In one embodiment of the invention, the device further includes an angle monitoring and control system. Specifically, an inclination sensor (not shown in the figure) is installed on the movable frame 31 or the I-beam 1 to monitor the actual tilt angle of the movable frame 31 in real time. The inclination sensor is electrically connected to a controller. When the controller detects that the difference between the reading of the inclination sensor and the preset design tilt angle exceeds the allowable threshold, the controller first sends a command to the third linear drive 52 to clamp the steel pipe pile; then it sends a compensation command to the first linear drive 41 to drive the movable frame 31 to rotate until the inclination sensor reading returns to the design angle.

[0059] Working principle: First, one end of the I-beam 1 is connected or welded to the load-bearing beam of the steel trestle bridge using high-strength bolts. After the support platform 2 is positioned by lifting equipment, the other end of the I-beam 1 is welded to fix the support platform 2, completing the installation of the device. During the vertical pile construction, the first linear drive component 41 of the telescopic drive unit 4 retracts to drive the movable frame 31 to rotate around the transmission shaft 6 to a vertical working state where the central axis of the movable frame 31 is perpendicular to the top surface of the support platform 2. The inner opening of the movable frame 31 faces upward and is directly opposite the opening 7. The lifting equipment vertically lifts the steel pipe pile and inserts it into the ground through the inner side of the movable frame 31 and the opening 7. The third linear drive component 52 drives the symmetrically arranged clamping plates 51 to move and clamp the side wall of the steel pipe pile to form a limiting channel. The steel pipe pile passes vertically through the space between the clamping plates 51 and passes through the opening 7 to complete the vertical pile limiting construction. During inclined pile construction, the piston rod of the first linear drive component 41 extends to drive the movable frame 31 to rotate around the transmission shaft 6, switching the side support plate 32 and clamping unit 5 from the vertical state to the designed inclination angle. The second linear drive component 42 adjusts synchronously with the first linear drive component 41 to assist in supporting the side support plate 32. The lifting equipment lifts the steel pipe pile and guides it along the side support plate 32 and the arc surface of the guide plate 33, inserting it into the clamping plate 51 limiting channel inside the movable frame 31 and then downwards through the opening 7. During the lowering of the steel pipe pile, the side support plate 32 bears lateral pressure, causing the I-beam 1 to undergo elastic deformation and causing a deviation in the preset inclination angle. At this time, the output end of the third linear drive component 52 extends. The driving clamping plate 51 clamps the side wall of the steel pipe pile, temporarily fixing the steel pipe pile and the movable frame 31 into one. Then, the first linear drive component 41 drives the movable frame 31 to rotate around the transmission shaft 6, causing the clamped steel pipe pile to be precisely adjusted in terms of deflection angle. After the angle adjustment is completed, the third linear drive component 52 retracts to release the clamping plate 51 from locking the steel pipe pile. The steel pipe pile continues to move down along the inclined direction of the side support plate 32 and passes through the opening 7 to complete the inclined pile limiting construction. Throughout the process, the guide rod 53 moves with the clamping plate 51 and slides in the through hole of the side wall of the movable frame 31 to keep the clamping plate 51 moving in parallel. The movable frame 31 is always located above the opening 7 to ensure that the steel pipe pile accurately passes through the opening 7.

[0060] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A steel trestle steel pipe pile construction limiting device, comprising an I-steel (1), one end of the I-steel (1) is installed on a bearing beam, the other end extends outward and installs a support platform (2), characterized in that, Also includes: An angle adjustment unit (3) is installed on the top of the support platform (2). The angle adjustment unit (3) includes a movable frame (31) and a side support plate (32). The movable frame (31) is hinged to the top of the support platform (2) through a transmission shaft (6). The side support plate (32) is fixedly installed on the bottom of one side of the movable frame (31) in the width direction. Telescopic drive unit (4), which is mounted on support platform (2), is used to drive movable frame (31) to rotate around the axis of drive shaft (6); A clamping unit (5) is symmetrically mounted on the movable frame (31). The clamping unit (5) includes a clamping plate (51) and a third linear drive (52). The fixed end of the third linear drive component (52) is fixedly installed on the movable frame (31); The clamping plate (51) is fixedly installed on the outer wall of the third linear drive (52) and the clamping plate (51) is located inside the movable frame (31). The symmetrically arranged clamping plates (51) are used to clamp the steel pipe pile. The opening (7) is opened through the bottom of the support platform (2), and the steel pipe pile can extend through the opening (7) to the ground.

2. The steel trestle steel pipe pile construction limiting device according to claim 1, characterized in that, A guide plate (33) is fixedly installed on the side of the side support plate (32) facing the opening (7).

3. The steel trestle steel pipe pile construction limiting device according to claim 2, characterized in that, The guide plate (33) is arc-shaped on the side facing the opening (7).

4. The steel pier steel pipe pile construction limiting device according to claim 1, characterized in that, The telescopic drive unit (4) includes a first linear drive member (41), which is arranged at an angle. One end of the first linear drive member (41) is hinged to the top of the support platform (2), and the other end of the first linear drive member (41) is hinged to the outer wall of the movable frame (31).

5. The steel pier steel pipe pile construction limiting device according to claim 2, characterized in that, The telescopic drive unit (4) further includes a second linear drive member (42), which is arranged at an angle. One end of the second linear drive member (42) is hinged to the top of the support platform (2), and the other end of the second linear drive member (42) is hinged to one side of the side support plate (32).

6. The steel pier steel pipe pile construction limiting device according to claim 1, characterized in that, A guide rod (53) is fixedly installed on the outer wall of the clamping plate (51). The guide rod (53) passes through the side wall of the movable frame (31) and is slidably connected to the part of the movable frame (31) through which it passes.

7. The steel-pier construction limiting device of claim 1, wherein The clamping plate (51) is arc-shaped on one side facing the middle of the movable frame (31).

8. The steel-pier construction limiting device of claim 1, wherein The movable frame (31) is located above the opening (7).

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