A quick installation and dismounting device for a cast-in-place pile duct

Abstract

The utility model discloses a kind of quick installation and disassembly devices of bored pile guide pipe, belong to civil engineering construction technical field.The device is made of tie wood (6), the well-shaped operation platform welded by I-beam and box girder, the beam (2) of being able to draw and replace and the U-shaped hoop (1) of being able to slide on beam and being slidable;Platform four corners are provided with lifting hole (4), central reserved guide pipe hole, beam straddles hole and forms movable guide rail, U-shaped hoop slides along beam ±500 mm, opening width is 10-20 mm larger than the outer diameter of guide pipe, only through dead weight and small stroke compaction can lock solid guide pipe.When operating, platform can be hoisted in whole, U-shaped hoop fine adjustment is realized by sliding, bolt locking is exempted, when disassembling, guide pipe can be released by reverse sliding.The utility model omits high-altitude bolt operation of traditional hinge card, has the advantages of quick installation and disassembly, accurate alignment, safe and reliable, turnover rate is high, applicable to various bored pile guide pipe installation and disassembly construction.

Description

Technical Field

[0001] This utility model belongs to the field of civil engineering construction technology, and in particular relates to the rapid installation and disassembly of the guide pipe during the concrete pouring process of bored cast-in-place piles. Background Technology

[0002] After the bored pile hole is formed, concrete needs to be continuously poured into the pile hole using a tremie pipe. Due to the narrow working area at the borehole opening and the large weight of the tremie pipe segments, the traditional method generally uses temporary platforms in sections with hinged clamps for manual alignment, requiring multiple tightening of bolts to secure the tremie pipe. This method has the following drawbacks: The platform needs to be assembled on-site, and disassembly and transportation are time-consuming when changing pile holes; With the plate position fixed, it is difficult to make fine adjustments when the conduit becomes eccentric, which can easily cause shearing and grout leakage at the flange connection. Repeatedly tightening bolts at heights is inefficient and poses high safety risks.

[0003] Therefore, it is necessary to provide a conduit installation and dismantling device that can be hoisted as a whole, can slide and finely adjust, and is boltless to improve construction efficiency and operational safety. Utility Model Content

[0004] The present invention aims to provide a quick installation and dismantling device for cast-in-place pile guide pipes, in order to solve the problems of long platform assembly time, difficulty in guide pipe alignment and adjustment, and low efficiency and poor safety caused by repeated bolt tightening at high altitudes in the prior art.

[0005] To achieve the purpose of water supply, this utility model is implemented as follows: A quick installation and dismantling device for cast-in-place pile guide pipes includes: sleepers (6), a grid-shaped working platform welded from I-beams (5) and box girders (3), a replaceable crossbeam (2), and a U-shaped sleeve (1) that sits on the crossbeam and can slide; the working platform has hoisting holes (4) at the four corners and a guide pipe opening reserved in the middle; the crossbeam spans the opening to form a movable guide rail, and the U-shaped sleeve slides ±500 mm along the crossbeam. The opening width is 10–20 mm larger than the outer diameter of the guide pipe. The guide pipe can be locked by its own weight and small stroke compression, realizing overall hoisting, sliding fine adjustment, and boltless quick installation and dismantling.

[0006] Furthermore, it also includes: The crossbeam (2) is a Q235 steel pipe Φ48×3.5 mm, with 500 mm simple support sections reserved at both ends, which can be replaced by a single person to ensure the strength of the guide rail while controlling the weight. The inner sides of the U-shaped sleeve (1) are welded with 5 mm thick rubber pads to buffer the swaying of the conduit and protect the galvanized layer on the outer wall of the conduit.

[0007] The lifting hole (4) is made of square hole with a 25 mm diameter grade III steel lifting ring welded inside, so that the crane can directly hook it and realize the overall lifting of the platform without disassembly.

[0008] The number of sleeper (6) layers and spacing are adjusted according to the upper load and foundation conditions. The levelness of the platform is finely adjusted by adding pads to adapt to complex geology.

[0009] Hinged flaps are added to the four sides of the opening of the work platform. When flipped up, they form a guardrail, and when flipped down, they are flush with the platform surface, thus taking into account both safety protection and pipeline passage.

[0010] The crossbeam (2) has pin holes at both ends and can be quickly locked or released by the pins, allowing for rapid replacement of crossbeams of different diameters and expanding the range of applicable conduit specifications.

[0011] The quick installation and removal device for the grouting pile guide pipe shown in this utility model adopts the above design and has the following advantages and features: 1. Overall hoisting: The platform can be moved with a single hook at the four corners of the hoisting hole, greatly shortening the time for changing pile holes.

[0012] 2. Sliding fine adjustment: The U-shaped sleeve slides freely along the crossbeam, ensuring high alignment accuracy of the guide pipe and preventing grout leakage due to flange shear.

[0013] 3. Boltless locking: It can be locked by its own weight, reducing the need for bolt tightening at heights and lowering safety risks.

[0014] 4. Quick interchangeability: The crossbeam can be replaced, the flap can be folded, and the sleeper spacing can be adjusted. One set of equipment can adapt to a variety of conduit diameters and site conditions.

[0015] 5. High turnover rate: All components can be disassembled without welding, can be folded or stacked, reducing transportation volume and significantly increasing the number of times they can be reused.

[0016] In summary, this utility model, with its core of "grid-shaped integrated platform + sliding crossbeam + U-shaped self-locking sleeve", solves the three major drawbacks of traditional fixed plate alignment difficulties, repeated platform assembly, and high-altitude bolting operations. It has the advantages of high construction efficiency, strong adaptability, and safety and reliability, and is suitable for the installation and dismantling of guide pipes for various types of bored piles. Attached Figure Description

[0017] Figure 1 This is a front view of the catheter installation and removal device described in this utility model.

[0018] Figure 2 This is a top view of the catheter installation and removal device described in this utility model.

[0019] Figure 3 This is a side view of the U-shaped sleeve (1) in the conduit installation and removal device of this utility model. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Example 1: A bridge pier bored pile construction site with a pile diameter of 1.2 m, a guide pipe outer diameter of Φ219 mm, a wall thickness of 8 mm, and a single section length of 4 m.

[0022] 1. Components are prefabricated in the factory. a. Working platform: The main beam is made of I14 I-beam (5) and 300×200×8 mm box girder (3) welded into a 2.4 m×2.4 m grid frame. 80×80 mm square holes are cut at the four corners as lifting holes (4). Φ25 mm grade III steel lifting rings are fully welded around the inside of the holes.

[0023] b. Crossbeam (2): Q235 steel pipe Φ48×3.5 mm, length 3.0 m, with Φ12 mm pin holes drilled at both ends 500 mm from the end for quick locking or replacement.

[0024] c. U-shaped sleeve (1): 10# channel steel is bent into a U shape with an opening width of 240 mm (21 mm larger than the outer diameter of the conduit). 5 mm oil-resistant rubber pads are glued to the inside. Φ10 mm round steel handrails are welded to the upper edge of both arms to facilitate manual sliding.

[0025] 2. On-site installation Level the area around the pile hole, and lay two layers of 150×150×2500 mm sleepers (6) at a longitudinal and transverse spacing of 600 mm. The top surface of the top sleeper is leveled with a spirit level, and some areas are filled with steel plate shims. Figures 1-3 As shown.

[0026] ② The truck crane lifts the entire working platform onto the sleepers through the lifting hole (4), so that the deviation between the center of the central opening and the center of the pile position is ≤20 mm.

[0027] ③ Place the three crossbeams (2) in parallel above the opening, with the 500 mm simply supported sections at both ends placed on the upper flange of the box girder (3), and insert cotter pins to prevent lateral slippage.

[0028] ④ Use a truck crane to vertically lift the guide pipe above the opening, and slowly lower it to a height of 1 m from the opening. Manually hold the U-shaped clamp (1) handle and slide it along the crossbeam (2) to let the guide pipe enter the clamp. Continue to lower the guide pipe until the flange sits on the upper edge of the clamp, and the self-weight will achieve locking.

[0029] ⑤ When extending the conduit, the crane slightly lifts the conduit → the sliding sleeve makes room for the flange operation → the threaded connection is completed → the sliding sleeve is reset, and no bolts are needed throughout the entire process.

[0030] 3. Disassembly and relocation After concrete pouring is completed, the truck crane lifts the guide pipe to a height of 1 m above the borehole opening. The manual sliding of the clamps detaches it from the flange. The crane then removes the guide pipe, pulls out the cotter pin on the crossbeam, replaces the crossbeam, and the truck crane hooks the four corner lifting rings to lift the entire pipe to the next pile location. The above steps are repeated. In this embodiment, the installation and dismantling of a single pile guide pipe using a single device takes approximately 25 minutes, which is about 40 minutes shorter than the traditional hinge and clamp method. Furthermore, the entire process involves no high-altitude bolting operations.

[0031] Example 2 On construction sites where the conduit diameter changes to Φ273 mm, only the U-shaped clamp (1) with an opening width of 290 mm and the three crossbeams (2) with corresponding length adjustments need to be replaced, while the rest of the components remain unchanged. This allows the platform to be used directly, enabling it to adapt to multiple conduit specifications.

[0032] As can be seen from the above embodiments, this utility model takes "integrated hoisting platform + replaceable crossbeam + sliding U-shaped sleeve" as its core, realizes rapid alignment of guide pipe installation and disassembly, boltless locking and safe and efficient turnover, and is applicable to various types of bored pile construction.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A quick installation and dismantling device for cast-in-place pile guide pipes, characterized in that: include: Sleepers (6) are used to distribute the load and level the load; The working platform is welded from I-beams (5) and box beams (3) into a grid-shaped frame. The frame has hoisting holes (4) at the four corners and a guide pipe opening in the middle. The crossbeam (2), with at least three parallel steel pipes spanning the opening and simply supported on the working platform, forms a replaceable movable guide rail; U-shaped clamp (1) sits on the crossbeam (2) and can slide along it. The opening width is 10–20 mm larger than the outer diameter of the conduit. The conduit can be locked by its own weight and small stroke compression. In this way, the work platform can be hoisted as a whole, and the U-shaped sleeve (1) can slide and be finely adjusted on the crossbeam (2) to realize the quick installation and removal of the conduit and boltless locking.

2. The quick installation and removal device for cast-in-place pile guide pipes according to claim 1, characterized in that: The crossbeam (2) is a Q235 steel pipe with a specification of Φ48×3.5 mm. Both ends are reserved with a 500 mm simple support section for easy replacement by a single person.

3. The quick installation and removal device for the cast-in-place pile guide pipe according to claim 1 or 2, characterized in that: The U-shaped sleeve (1) is welded from steel profiles, and 5 mm thick rubber pads are welded to the inner sides of both arms to buffer the swaying of the conduit and protect the surface.

4. The quick installation and removal device for cast-in-place pile guide pipes according to claim 1, characterized in that: The lifting hole (4) is a square hole, and a 25 mm diameter grade III steel lifting ring is welded inside the hole for the crane to lift and move the whole structure.

5. The quick installation and removal device for the cast-in-place pile guide pipe according to claim 1, characterized in that: The number of sleeper (6) layers and spacing can be adjusted according to the upper load and foundation conditions, and the platform levelness is achieved by adding pads.

6. The quick installation and removal device for cast-in-place pile guide pipes according to claim 1, characterized in that: The opening of the work platform is hinged with flaps on all four sides. When flipped up, they form a protective railing, and when flipped down, they are flush with the platform surface, facilitating the entry and exit of conduits.

7. The quick installation and removal device for cast-in-place pile guide pipes according to claim 1, characterized in that: The crossbeam (2) has pin holes at both ends, which can be quickly locked or released by the pins to realize the replacement of crossbeams of different diameters to adapt to various conduit specifications.

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