Four-point hoisting support for pile foundation reinforcement cage

Abstract

The utility model relates to the technical field of pile foundation construction, in particular to a four-point hoisting bracket for a pile foundation reinforcement cage, and aims to solve the technical problems that the in-place accuracy cannot be detected after the reinforcement cage is fed into a pile hole, and the hoisting bracket for supporting is low in stability and the reinforcement cage is easy to deviate when concrete is poured. According to the technical scheme, the four-point hoisting support for the pile foundation reinforcement cage comprises a support frame of a rectangular structure, four anchoring seats welded and installed on the periphery of the upper surface of the support frame, a threaded sleeve, an anchor nail, a horizontal measuring ruler, a sliding groove, a longitudinal measuring rod and a positioning piece; the mounting stability of the support frame on the top face of a pile hole is improved through the detachable anchor nails, the horizontal measuring ruler and the longitudinal measuring rod are combined for use, the position of the reinforcement cage can be conveniently adjusted according to the measuring result, the pile foundation construction quality is guaranteed, and the problems that after the reinforcement cage is fed into the pile hole, the in-position accuracy cannot be detected, and concrete is poured, the construction efficiency is high are solved. A hoisting bracket for supporting is not high in stability, and the reinforcement cage is easy to deviate.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a four-point hoisting bracket for a pile foundation steel bar cage. Background Art

[0002] Pile foundation construction in the field of construction engineering is a larger sub-project in a unit project. It has high construction quality requirements and relatively complex construction technology. Pile foundation construction is the foundation of ground building structures and is directly related to the safety of use and structural life of building structures. The pile foundation construction process of bored cast-in-place piles includes positioning the drilling rig, drilling holes for the pile foundation, hanging steel cages, and pouring concrete.

[0003] The steel cage hoisting in the pile foundation construction process generally uses a crane to lift the tied steel cage vertically from the ground and put it into the pile hole. After the steel cage is in place, the verticality and concentricity with the pile hole must be fully guaranteed, and the horizontal deviation value of the steel cage relative to the center of the pile hole must be controlled. Only in this way can the poured concrete form a uniform protective layer on the outside of the steel cage, and the structural strength and bearing capacity of the pile foundation be guaranteed. The current pile foundation steel cage only plays an auxiliary lifting role and the top support role of the steel cage after entering the pile hole. It is not possible to detect the entry depth of the steel cage and the concentricity of the steel cage and the pile hole. Moreover, when pouring concrete, the concrete continues to hit the steel cage, which can easily cause the steel cage to deviate.

[0004] Therefore, in view of the fact that the existing steel cage lifting bracket has a single function, and after the steel cage is sent into the pile hole, its entry depth and concentricity with the pile hole cannot be detected, and when pouring concrete, the bracket is not stable and the steel cage is easily dislocated, a high-stability lifting bracket with the function of measuring the entry of the steel cage into the hole can be designed to ensure the installation quality of the steel cage in pile foundation construction. Utility Model Content

[0005] In order to overcome the problem that the positioning accuracy of the steel cage cannot be tested after it is sent into the pile hole, the lifting bracket used for support is not stable when pouring concrete, and the steel cage is easily misaligned.

[0006] The technical scheme of the utility model is: a four-point lifting bracket for a pile foundation steel cage, comprising a bracket frame with a rectangular structure, four anchor seats welded and installed around the upper surface of the bracket frame, screw sleeves, anchor nails, a horizontal ruler, a slide groove, a longitudinal measuring rod, and a positioning piece; the bracket frame is composed of an upper and lower wing plate and a partition between the wing plates to form an I-shaped cross-section, the upper end of the steel bar hole is fixed by a chain and an anchor seat bolt system, the hook of the crane is fixed by a sling and the anchor seat bolt system, screw sleeves are welded and fixed at the four corners of the lower end of the bracket frame, the upper end of the anchor nail has a screw head that matches the screw sleeve, a horizontal rotating and movable horizontal ruler is arranged at one corner of the upper end of the bracket frame to measure the distance between the outer wall of the steel cage and the inner wall of the pile hole, a slide groove is opened on the horizontal ruler, the longitudinal measuring rod is matched with the slide groove and inserted in the slide groove to measure the height of the top surface of the steel cage, and the horizontal ruler is locked with the corners of the bracket frame by the positioning piece.

[0007] Preferably, after the steel cage is fixed to the anchor seat, it is lifted by a crane and placed into the pile hole. When the support frame is close to the ground, anchor nails are installed and manually hammered into the soil layer on the top of the pile to fix the steel cage as it is lowered. After the steel cage completely enters the pile hole, the horizontal ruler is rotated and fixed by the positioning piece. The distance between the steel cage and the inner wall of the pile hole and the height of the top surface of the steel cage are measured in combination with the longitudinal measuring rod. Then, the connection between the crane and the anchor seat is released. On the basis of the steel cage being directly pulled and fixed by the crane, the position of the steel cage is adjusted by lengthening or shortening the tie chain between the steel cage and the anchor seat according to the measurement results.

[0008] Preferably, an anti-arch is welded and fixed at the four corners of the inner wall of the bracket frame. The anti-arch is an arc-shaped structure and the arc end is welded and fixed to the adjacent inner wall of the bracket frame. A triangular brace is welded and fixed between the inner arc of the anti-arch and the inner wall of the bracket frame. The anti-arch constitutes a reaction force structure between the adjacent side walls of the bracket frame. When the bracket frame is subjected to lateral force, the anti-arch and triangular brace structure can disperse the force to both sides, thereby enhancing the deformation resistance of the bracket frame.

[0009] Preferably, buckle rings matching the anchor pins and the longitudinal measuring rods are welded and fixed on all four sides of the outer wall of the bracket frame. The buckle rings are heat-tough stainless steel metal rings with openings on the edges. When the anchor pins and the horizontal ruler are not in use, they are fixed to the bracket frame by the buckle rings, making the bracket frame easy to store and transport.

[0010] Preferably, the four corners of the upper end of the bracket frame are fixedly connected to the rotating shaft, and one end of the horizontal ruler is fixedly connected to a clamping ring clamped on the rotating shaft. The horizontal ruler rotates horizontally with the rotating shaft as the axis, and the four corners of the upper end of the bracket frame are provided with pin holes with internal threads, and a locking hole is provided on the horizontal ruler. When the horizontal ruler is rotated to the middle of the corner point of the bracket frame, the locking hole is aligned with the corresponding pin hole up and down, and the horizontal ruler is clamped with the rotating shaft through the clamping ring, and can be quickly disassembled by pulling, and different rotating shafts are switched for installation and use. When the horizontal ruler is rotated to overlap with the axis of the steel cage, the position of the slide groove when the longitudinal measuring rod is against the outer wall of the steel cage can be relied on to determine the distance between the side of the steel cage and the inner wall of the pile hole according to the reading on the horizontal ruler. In addition, when the bottom end of the horizontal ruler is against the upper end of the steel cage, the position of the horizontal ruler on the longitudinal measuring rod is referred to, and the height of the top surface of the steel cage is determined according to the reading on the longitudinal measuring rod. Combined with the overall length of the steel cage and the depth of the pile hole, the distance between the bottom of the steel cage and the bottom of the pile hole is calculated.

[0011] Preferably, the positioning piece is a spring pin; the spring pin consists of a pin with a pier head and a spring sleeved on the pin, the pin is inserted into the pin hole, the spring is between the pier head and the lower surface of the upper wing plate of the support frame, when the horizontal ruler is rotated to overlap with the axis of the steel cage, the pin hole overlaps with the locking hole, and the spring pin is automatically pushed upward into the locking hole under the action of the spring, locking the horizontal ruler and keeping it stable during measurement.

[0012] Preferably, the positioning member is a bolt; the bolt is threaded in the pin hole, and when the horizontal ruler is rotated to overlap with the axis of the steel cage, the pin hole overlaps with the locking hole, the bolt is unscrewed from the pin hole, and screwed into the locking hole and the pin hole from top to bottom to lock the horizontal ruler to keep it stable during measurement.

[0013] Preferably, two silicone heads are fixedly connected around the upper end of the bracket frame, and the anchor seat is located between the silicone heads on the same side. The silicone heads are adapted to the slide grooves, and when the horizontal ruler is rotated to coincide with the side of the bracket frame, the silicone heads are squeezed into the slide grooves. After the silicone heads recover their elasticity, they serve as a limiting structure to prevent the horizontal ruler from rotating out.

[0014] Beneficial effects of the utility model:

[0015] 1. Using detachable anchor nails, when the lifting bracket carries the steel cage into the pile hole and puts it in place, it can be vertically inserted into the soil around the top surface of the pile hole. The soil's grip on the anchor nails can improve the stability of the bracket frame on the top surface of the pile hole. During the pouring process, the top of the steel cage will not deviate from its position due to the continuous impact of concrete because of the stable support of the bracket frame. After the steel cage enters the pile hole, the distance between the steel cage and the inner wall of the pile hole and the height of the top surface of the steel cage can be measured by combining the horizontal ruler and the longitudinal measuring rod. It is convenient to adjust the position of the steel cage according to the measurement results to meet the installation depth and concentricity requirements with the pile hole, thereby ensuring the quality of pile foundation construction;

[0016] 2. The horizontal ruler can be easily installed and removed on the rotating shaft through the clamping ring, which is convenient for switching between the four corner points on the bracket frame, and the four points on the outer wall of the steel cage can be measured separately, which is flexible to use;

[0017] 3. By using the anti-arch and triangular support structures arranged at the four corners of the inner wall of the support frame, a reaction force structure is formed between the adjacent side edges of the support frame 1, thereby further enhancing the anti-deformation ability of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 What is shown is a schematic diagram of the first three-dimensional structure of the four-point lifting bracket of the pile foundation steel cage of the utility model;

[0019] Figure 2 What is shown is a second three-dimensional structure schematic diagram of the four-point lifting bracket of the pile foundation steel cage of the utility model;

[0020] Figure 3 What is shown is a first three-dimensional structural schematic diagram of a four-point lifting bracket frame of a pile foundation steel cage of the utility model;

[0021] Figure 4 The second three-dimensional structure schematic diagram of the support frame of the four-point lifting support for the pile foundation steel cage of the utility model is shown;

[0022] Figure 5 Shown is a third three-dimensional structural schematic diagram of a four-point lifting bracket frame of a pile foundation steel cage of the utility model;

[0023] Figure 6 The three-dimensional structure diagram of the first embodiment of the four-point lifting bracket positioning member of the pile foundation reinforcement cage of the utility model is shown;

[0024] Figure 7 What is shown is a three-dimensional structural schematic diagram of a second embodiment of a four-point lifting bracket positioning component of a pile foundation reinforcement cage of the utility model.

[0025] Explanation of the accompanying reference numerals: 1. bracket frame; 2. anchor seat; 3. screw sleeve; 4. anchor nail; 5. horizontal measuring ruler; 6. slide groove; 7. longitudinal measuring rod; 8. reverse arch; 9. triangular support; 10. buckle; 11. rotating shaft; 12. retaining ring; 13. pin hole; 14. locking hole; 1501. spring pin; 1502. bolt; 16. silicone head. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 1-2 The utility model provides a four-point lifting bracket for a pile foundation steel cage, comprising a bracket frame 1 with a rectangular structure, four anchor seats 2 welded and installed around the upper surface of the bracket frame 1, screw sleeves 3, anchors 4, a horizontal ruler 5, a slide 6, a longitudinal measuring rod 7, and a positioning piece; the bracket frame 1 is composed of an upper and lower wing plate and a partition between the wing plates to form an I-shaped cross-section, the upper end of the steel bar hole is fixed by a chain and an anchor seat 2, the hook of the crane is fixed by a sling and the anchor seat 2, the four corners of the lower end of the bracket frame 1 are welded and fixed with screw sleeves 3, the upper end of the anchor 4 has a screw head adapted to the screw sleeve 3, a horizontal ruler 5 with horizontal rotation is arranged at one corner of the upper end of the bracket frame 1 to measure the distance between the outer wall of the steel cage and the inner wall of the pile hole, a slide 6 is provided on the horizontal ruler 5, and the longitudinal measuring rod 7 is adapted to and plugged into the slide 6 The height of the top surface of the steel cage is measured in the slide groove 6, and the horizontal ruler 5 is locked with the corners of the support frame 1 by the positioning piece. After the steel cage is fixed to the anchor seat 2, it is lifted by the crane and placed in the pile hole. When the support frame 1 is close to the ground, the anchor nails 4 are installed and manually knocked. As the steel cage is lowered, the anchor nails 4 are nailed into the soil layer on the top of the pile to fix it. After the steel cage completely enters the pile hole, the horizontal ruler 5 is rotated and fixed by the positioning piece, and the distance between the steel cage and the inner wall of the pile hole and the height of the top surface of the steel cage are measured respectively in combination with the longitudinal measuring rod 7, and then the connection between the crane and the anchor seat 2 is released. On the basis that the steel cage is directly pulled and fixed by the crane, the position of the steel cage is adjusted by lengthening or shortening the tethering chain between the steel cage and the anchor seat 2 according to the measurement results.

[0028] See also Figure 3-5In this embodiment, an anti-arch 8 is welded and fixed at each of the four corners of the inner wall of the bracket frame 1. The anti-arch 8 is an arc-shaped structure and the arc end is welded and fixed to the adjacent inner wall of the bracket frame 1. A triangular support 9 is welded and fixed between the inner arc of the anti-arch 8 and the inner wall of the bracket frame 1. The anti-arch 8 forms a reaction force structure between the adjacent side walls of the bracket frame 1. When the bracket frame 1 is subjected to lateral force, the anti-arch 8 and the triangular support 9 structure can disperse the force to both sides to enhance the deformation resistance of the bracket frame 1. The outer wall of the bracket frame 1 is welded and fixed with a buckle 10 adapted to the anchor nail 4 and the longitudinal measuring rod 7. The buckle 10 is a stainless steel metal ring with thermal toughness and an opening at the edge. When the anchor nail 4 and the horizontal ruler 5 are not in use, they are fixed to the four sides of the bracket frame 1 through the buckle 10, so that the bracket frame 1 is convenient for storage and transportation. The four corners of the upper end of the bracket frame 1 are fixedly connected with a rotating shaft 11, and one end of the horizontal ruler 5 is fixedly connected with a clamping ring 12 clamped on the rotating shaft 11. The horizontal ruler 5 rotates horizontally with the rotating shaft 11 as the axis. Pin holes 13 with internal threads are opened at the four corners of the upper end of the bracket frame 1, and a locking hole 14 is opened on the horizontal ruler 5. The horizontal ruler 5 is rotated to the bracket frame 1 When the locking hole 14 is in the middle of the corner point, it is aligned with the corresponding pin hole 13 up and down. The horizontal ruler 5 is connected with the rotating shaft 11 through the clamping ring 12. It can be quickly disassembled by pulling. Different rotating shafts 11 are switched for installation and use. When the horizontal ruler 5 is rotated to overlap with the axis of the steel cage, the position of the slide 6 when the longitudinal measuring rod 7 is against the outer wall of the steel cage can be relied on. The distance between the side of the steel cage and the inner wall of the pile hole can be determined according to the reading on the horizontal ruler 5. In addition, when the bottom end of the longitudinal measuring rod 7 is against the upper end of the steel cage, the horizontal ruler 5 is referred to. The position on the longitudinal measuring rod 7 is determined, and the height of the top surface of the steel cage is determined according to the reading on the longitudinal measuring rod 7. In combination with the overall length of the steel cage and the depth of the pile hole, the distance from the bottom of the steel cage to the bottom of the pile hole is calculated. Two silicone heads 16 are fixedly connected to the upper end of the bracket frame 1, and the anchor seat 2 is between the silicone heads 16 on the same side. The silicone head 16 is adapted to the slide groove 6. When the horizontal ruler 5 is rotated to coincide with the side of the bracket frame 1, the silicone head 16 is squeezed into the slide groove 6. After the silicone head 16 recovers its elasticity, it serves as a limiting structure to prevent the horizontal ruler 5 from rotating out.

[0029] Example 1: Please refer to Figure 6 In this embodiment, the positioning member is a spring pin 1501; the spring pin 1501 is composed of a pin with a pier head and a spring sleeved on the pin, the pin is inserted into the pin hole 13, the spring is between the pier head and the lower surface of the upper wing plate of the support frame 1, when the horizontal ruler 5 is rotated to overlap with the axis of the steel cage, the pin hole 13 overlaps with the locking hole 14, and the spring pin 1501 is automatically pushed upward into the locking hole 14 under the action of the spring, locking the horizontal ruler 5 and keeping it stable during measurement.

[0030] Example 2: Please refer to Figure 7In this embodiment, the positioning member is a bolt 1502; the bolt 1502 is threadedly connected in the pin hole 13. When the horizontal ruler 5 is rotated to overlap with the axis of the steel cage, the pin hole 13 overlaps with the locking hole 14. The bolt 1502 is screwed out of the pin hole 13 and screwed into the locking hole 14 and the pin hole 13 from top to bottom to lock the horizontal ruler 5 and keep it stable during measurement.

[0031] When working, first fix the anchor seat 2 with the hook of the crane through the sling, then fix the anchor seat 2 with the top surface of the steel cage, lift the steel cage by the crane and put it into the pile hole, and when the support frame 1 is 50cm-100cm close to the ground, install the anchor nail 4, and use manual knocking to nail the anchor nail 4 into the soil layer on the top of the pile to fix it as the steel cage is lowered;

[0032] After the steel cage is completely in the pile hole, the connection between the crane and the anchor seat 2 is released, and the steel cage and the crane are directly pulled and fixed, the horizontal ruler 5 is rotated to overlap with the axis of the steel cage, the horizontal ruler 5 is fixed to the bracket frame 1 using a positioning piece, and the longitudinal measuring rod 7 is inserted into the slide groove 6. The longitudinal measuring rod 7 is first pressed against the outer wall of the steel cage, and the distance between the side of the steel cage and the inner wall of the pile hole is determined according to the position of the longitudinal measuring rod 7 in the slide groove 6, and the distance between the steel cage and the inner wall of the pile hole is determined according to the reading on the horizontal ruler 5. Then, the bottom end of the longitudinal measuring rod 7 is pressed against the upper end of the steel cage, and the position of the horizontal ruler 5 on the longitudinal measuring rod 7 is referred to. The height of the top surface of the steel cage is determined according to the reading on the longitudinal measuring rod 7. According to the above measurement results, the position of the steel cage is adjusted by lengthening or shortening the tethering chain between the steel cage and the anchor seat 2 to ensure that the concentricity of the steel cage and the pile hole and the distance between the bottom of the steel cage and the bottom of the pile hole are within a suitable range;

[0033] Then, concrete is poured into the pile hole, and the soil's grip on the anchor 4 is used to enhance the stability of the support frame 1 on the top surface of the pile hole, ensuring that during the pouring process, the support frame 1 will not move due to continuous impact of the concrete, and the steel cage will not deviate from its position.

[0034] Through the above steps, the detachable anchor nail 4 can be used to vertically insert the soil around the top surface of the pile hole during the process of the lifting bracket carrying the steel cage into the pile hole and in position. The soil's grip on the anchor nail 4 can improve the stability of the bracket frame 1 on the top surface of the pile hole. During the pouring process, the top of the steel cage will not deviate from its position due to the continuous impact of concrete because of the stable support of the bracket frame 1. After the steel cage enters the pile hole, the distance between the steel cage and the inner wall of the pile hole and the height of the top surface of the steel cage can be measured by combining the horizontal ruler 5 and the longitudinal measuring rod 7. It is convenient to adjust the position of the steel cage according to the measurement results to meet the installation depth and concentricity requirements with the pile hole, ensure the quality of pile foundation construction, and solve the problem that the steel cage cannot be detected for positioning accuracy after being sent into the pile hole, and the lifting bracket used for support is not stable when pouring concrete, and the steel cage is easy to deviate.

[0035] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A four-point hoisting bracket for a pile foundation steel cage, comprising a bracket frame (1) having a rectangular structure, and four anchor seats (2) welded and mounted on the upper surface of the bracket frame (1) around the four sides; characterized in that: The bracket frame (1) further comprises a screw sleeve (3), an anchor (4), a horizontal measuring ruler (5), a slide groove (6), a longitudinal measuring rod (7) and a positioning piece; the bracket frame (1) is composed of an upper and lower wing plate and a partition plate between the wing plates to form an I-shaped cross section; the upper end of the steel bar hole is fixed by a chain and an anchor seat (2); the hook of the crane is fixed by a sling and the anchor seat (2); screw sleeves (3) are welded and fixed at the four corners of the lower end of the bracket frame (1); the upper end of the anchor (4) has a screw head adapted to the screw sleeve (3); a horizontal measuring ruler (5) that is horizontally rotatable and movable is arranged at one corner of the upper end of the bracket frame (1) to measure the distance between the outer wall of the steel cage and the inner wall of the pile hole; a slide groove (6) is provided on the horizontal measuring ruler (5); the longitudinal measuring rod (7) is adapted to and inserted into the slide groove (6) to measure the height of the top surface of the steel cage; the horizontal measuring ruler (5) and the corners of the bracket frame (1) are locked by the positioning piece.

2. A four-point lifting bracket for pile foundation reinforcement cage according to claim 1, characterized in that: A reverse arch (8) is welded and fixed at each of the four corners of the inner wall of the support frame (1); the reverse arch (8) is an arc-shaped structure and the arc end is welded and fixed to the adjacent inner wall of the support frame (1); a triangular support (9) is welded and fixed between the inner arc of the reverse arch (8) and the inner wall of the support frame (1).

3. A four-point lifting bracket for pile foundation reinforcement cage according to claim 1, characterized in that: Buckles (10) adapted to the anchor nails (4) and the longitudinal measuring rods (7) are welded and fixed around the outer wall of the support frame (1); the buckles (10) are stainless steel metal rings with thermal toughness and have openings at the edges.

4. A four-point lifting bracket for pile foundation reinforcement cage according to claim 1, characterized in that: The four corners of the upper end of the support frame (1) are fixedly connected to a rotating shaft (11); one end of the horizontal ruler (5) is fixedly connected to a clamping ring (12) clamped on the rotating shaft (11); the horizontal ruler (5) rotates horizontally with the rotating shaft (11) as the axis; the four corners of the upper end of the support frame (1) are provided with pin holes (13) with internal threads; the horizontal ruler (5) is provided with a locking hole (14); when the horizontal ruler (5) rotates to the middle of the corner point of the support frame (1), the locking hole (14) is aligned with the corresponding pin hole (13) in the upper and lower directions.

5. The four-point lifting bracket for pile foundation reinforcement cage according to claim 1 is characterized in that: The positioning member is a spring pin (1501); the spring pin (1501) is composed of a pin with a pier head and a spring sleeved on the pin, the pin is inserted into the pin hole (13), and the spring is located between the pier head and the lower surface of the upper wing plate of the support frame (1).

6. A four-point lifting bracket for pile foundation reinforcement cage according to claim 1, characterized in that: The positioning member is a bolt (1502); the bolt (1502) is threadedly connected in the pin hole (13).

7. A four-point lifting bracket for pile foundation reinforcement cage according to claim 1, characterized in that: Two silicone heads (16) are fixedly connected around the upper end of the support frame (1), and the anchor seat (2) is located between the silicone heads (16) on the same side, and the silicone heads (16) are adapted to the slide groove (6).

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