Liftable pier for structural construction

Abstract

The utility model discloses a kind of liftable abutment for structural construction, including a bottom plate for being contacted with ground, a steel sleeve is fixed on bottom plate, four lifting lug structures are evenly spaced welded on the upper portion of the outer wall of steel sleeve, one outer limiting hole is respectively opened at the steel sleeve cylinder wall at the intermediate position between every two adjacent lifting lug structures;A liftable steel pipe is spacedly sleeved in steel sleeve, four groups of inner limiting holes are evenly spaced apart on the side wall of liftable steel pipe along the circumferential direction of liftable steel pipe, each group of inner limiting hole includes a plurality of inner limiting holes arranged in upper and lower interval, each group of inner limiting hole is correspondingly arranged with one outer limiting hole, the limiting plate passing through each outer limiting hole can pass through one inner limiting hole at set position in the group of inner limiting holes corresponding arrangement, cross support frame is welded in liftable steel pipe. Adopt this structure can adjust height and improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to a support pier that requires varying support height, and more particularly to a support pier used in the prefabrication stage of structural construction. Background Technology

[0002] During the construction process, offshore platform structures and land-based steel structure modules are disassembled into several horizontal and vertical sections. These structures are first prefabricated in the prefabrication site, then transported to the sandblasting and painting workshop for painting, and finally transported to the assembly site for multi-piece assembly.

[0003] Due to tight construction schedules, it is required to install as many accessories as possible, such as wall panels and equipment supports, during the prefabrication stage. This results in each structural segment needing to be supported at different heights during the prefabrication stage. Typically, several types of support blocks of fixed heights are prepared at the construction site. However, the number of projects underway at the site varies at different times, and the required number of support blocks of a certain height also varies. Therefore, there is often a need for additional support blocks to extend the length, and the existing support blocks cannot meet the demand. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a height-adjustable pier for structural construction that improves construction efficiency.

[0005] This utility model discloses a liftable pier for structural construction, comprising a base plate for contacting the ground, a steel sleeve fixed on the base plate, the steel sleeve being annular in shape, with four lifting lugs evenly spaced welded to the upper part of the outer wall of the steel sleeve along its circumference, and an outer limiting hole opened at the midpoint between each pair of adjacent lifting lugs on the sleeve wall; a liftable steel pipe is fitted inside the steel sleeve at intervals, with four sets of inner limiting holes evenly spaced on the side wall of the liftable steel pipe along its circumference, each set of inner limiting holes including multiple inner limiting holes spaced vertically, each set of inner limiting holes corresponding to one outer limiting hole; a limiting plate passing through each of the outer limiting holes can pass through one inner limiting hole at a set position in the corresponding set of inner limiting holes; a cross-shaped support frame is welded inside the liftable steel pipe, the cross-shaped support frame being used for connection to a crane via slings.

[0006] The beneficial effects of this utility model are:

[0007] 1. Improve the adaptability of construction site piers and reduce the size of piers required on site;

[0008] 2. Reduced the workload of on-site welding for extending and welding piers;

[0009] 3. It reduces material and labor costs for on-site construction and improves construction efficiency. Attached Figure Description

[0010] Figure 1 This is a perspective view of the liftable platform of this utility model;

[0011] Figure 2 for Figure 1 Top view of the structure shown;

[0012] Figure 3 for Figure 1 The diagram shows the application of the structure. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific implementation examples.

[0014] As shown in the attached figure, a liftable pier for structural construction includes a base plate for contacting the ground. A steel sleeve is fixed on the base plate. The steel sleeve is cylindrical. The fixing structure between the base plate and the steel sleeve can be: along the circumferential direction of the outer wall of the steel sleeve, four anti-tilting ribs are welded at even intervals between the lower side of the outer wall of the steel sleeve and the base plate, that is, arranged in four directions of 0°, 90°, 180° and 270° respectively.

[0015] Along the circumferential direction of the outer wall of the steel sleeve, four lifting lug structures are welded evenly at intervals on the upper part of the outer wall of the steel sleeve, with the same angle as the anti-tilting rib plate, for the purpose of shifting the pier.

[0016] An external limiting hole 5 is opened on the steel sleeve wall at the midpoint between each pair of adjacent lifting lug structures, which can be located at 45°, 135°, 225°, and 315° on the steel sleeve wall respectively.

[0017] A liftable steel pipe 8 is fitted inside the steel sleeve at intervals. Four sets of inner limiting holes are evenly spaced along the circumference of the liftable steel pipe on its side wall, positioned at 45°, 135°, 225°, and 315°. Each set of inner limiting holes includes multiple inner limiting holes 9 spaced vertically. Each set of inner limiting holes corresponds to one outer limiting hole. A limiting plate 6 passing through each outer limiting hole can pass through one of the inner limiting holes at a predetermined position within the corresponding set of inner limiting holes. Preferably, the dimensions of the four sets of inner limiting holes are the same as the inner limiting hole dimensions, and the outer limiting holes can be rectangular.

[0018] Preferably, four limiting protrusions 7 are fixedly fixed at intervals on the base plate 1 in the circumferential direction of the lower inner wall of the liftable steel pipe. These four limiting protrusions can be arc segments. A square steel bar 10 is provided between every two adjacent limiting protrusions. Each square steel bar is located at a position corresponding to the midpoint between two adjacent sets of inner limiting holes. The upper part of the square steel bar is fixedly connected to the inner wall of the liftable steel pipe. When the liftable steel pipe is raised to the point where the height of the lowest inner limiting hole is aligned with the height of the outer limiting hole, the lower end of the square steel bar remains between two adjacent limiting protrusions 10. The interaction between these two protrusions restricts the rotation of the liftable steel pipe and facilitates the alignment of the inner and outer limiting holes. The outer wall of the limiting protrusions 7 is spaced apart from the inner wall of the liftable steel pipe 8.

[0019] A cross-shaped support frame 11 is welded inside the liftable steel pipe 8. The cross-shaped support frame is used to connect with the crane via slings, thereby enabling the lifting of the liftable steel pipe. Preferably, the cross-shaped support frame is located in the upper middle part of the liftable steel pipe. The fixed position of the support frame should avoid the inner limit hole, and it is preferable to use a round pipe to prevent damage to the slings when lifting the liftable steel pipe.

[0020] Preferably, the outer diameter of the liftable steel pipe 8 is 2-5 mm smaller than the inner diameter of the steel sleeve 2. The outer wall of the limiting boss 7 has a gap of 5-15 mm with the inner wall of the liftable steel pipe 8, so that the liftable steel pipe 8 will not collide with the boss 7 when it is raised or lowered, which facilitates the lifting operation of the liftable steel pipe 8.

[0021] To avoid excessive shearing force on the limiting plate 6 when it is supported by the pier, and to facilitate placement and insertion, the thickness of the limiting plate is 2 to 4 mm smaller than the size of the outer limiting hole and the inner limiting hole.

[0022] During use, this device can be used with multiple liftable blocks simultaneously.

[0023] The working process of this device is as follows:

[0024] When using the support blocks, first determine the required support height for the precast structural segment. Use slings to loop around the support frame 11 inside the liftable steel pipe 8, with the rope loop at the end of the sling attached to the hook. Use a crane to lift the liftable steel pipe until the inner limiting hole 9 aligns with the outer limiting hole 5. During lifting, the interaction between the square steel 10 and the limiting boss 7 easily aligns the inner and outer limiting holes circumferentially. Then, insert the four limiting plates 6 into the limiting holes to fix the height of the liftable steel pipe. The distance from the lower surface of the base plate to the upper end of the liftable steel pipe should not exceed the required support height. After the support blocks are fixed, use wire ropes, shackles, and other slings to connect the hook to the lifting lug structure 4 on the sleeve 2. The crane then lifts the support blocks and places them in the position specified in the precast structural segment design. The ground at the support block location should be leveled beforehand to ensure full contact between the base plate 1 and the ground. Once all the support blocks are in place, cover the movable steel pipes with the existing thin plates on site. Multiple plates can be stacked to fine-tune the support height of the support blocks. If necessary, spot welding can be used to fix the plates to the support blocks. After the above work is completed, beams and other structures can be placed on the support blocks and assembled and welded according to the prefabrication sequence of the prefabrication plan.

Claims

1. A liftable pier for structural construction, comprising a base plate for contacting the ground, wherein a steel sleeve is fixed on the base plate, the steel sleeve being annular in shape, characterized in that: Along the circumferential direction of the outer wall of the steel sleeve, four lifting lug structures are evenly spaced welded on the upper part of the outer wall of the steel sleeve. An outer limiting hole (5) is opened on the steel sleeve wall at the middle position between each two adjacent lifting lug structures. A liftable steel pipe (8) is installed inside the steel sleeve at intervals. Along the circumferential direction of the liftable steel pipe, four sets of inner limiting holes are evenly spaced on the side wall of the liftable steel pipe. Each set of inner limiting holes includes multiple inner limiting holes (9) arranged vertically. Each set of inner limiting holes is respectively set with an outer limiting hole. The limiting plate (6) passing through each outer limiting hole can pass through an inner limiting hole at a set position in the corresponding set of inner limiting holes. A cross-shaped support frame (11) is welded inside the liftable steel pipe (8). The cross-shaped support frame is used to connect with the crane through a sling.

2. The liftable pier for structural construction according to claim 1, characterized in that: In the circumferential direction of the lower inner wall of the liftable steel pipe, four limiting bosses (7) are fixed at intervals on the base plate. The four limiting bosses can be arc segments. A square steel (10) is provided between every two adjacent limiting bosses. Each square steel (10) is located at the position corresponding to the middle position between two adjacent sets of inner limiting holes. The upper part of the square steel is fixedly connected to the inner wall of the liftable steel pipe. When the liftable steel pipe is raised to the height of the lowest inner limiting hole and the outer limiting hole, the lower end of the square steel is still located between two adjacent limiting bosses. The outer wall of the limiting boss is spaced apart from the inner wall of the liftable steel pipe.

3. The liftable pier for structural construction according to claim 1 or 2, characterized in that: The fixing structure between the base plate and the steel sleeve is as follows: along the circumferential direction of the outer wall of the steel sleeve, four anti-tilting ribs are evenly welded between the lower side of the outer wall of the steel sleeve and the base plate, and the angle of the four anti-tilting ribs is consistent with that of the four lifting lug structures.

4. The liftable pier for structural construction according to claim 1 or 2, characterized in that: The outer diameter of the liftable steel pipe is 2-5 mm smaller than the inner diameter of the steel sleeve, and there is a gap of 5-15 mm between the outer wall of the limiting boss and the inner wall of the liftable steel pipe.

5. The liftable pier for structural construction according to claim 1 or 2, characterized in that: The thickness of the limiting plate is 2 to 4 mm smaller than the size of the outer and inner limiting holes.

6. The liftable pier for structural construction according to claim 1 or 2, characterized in that: The four sets of inner limiting holes have the same dimensions as the inner limiting holes, and the outer limiting holes are rectangular.

7. The liftable pier for structural construction according to claim 1 or 2, characterized in that: The cross-shaped support frame is located in the upper middle part of the liftable steel pipe and is made of round pipe.

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