Limited-inner-diameter cast-in-place pile concrete guide pipe anti-clamping auxiliary device

Abstract

The utility model relates to the technical field of constructional engineering construction, and discloses a limited-inner-diameter cast-in-place pile concrete guide pipe anti-clamping auxiliary device which comprises a plurality of device outer frames attached to the interior of an inner row reinforcement cage and detachably connected with one another, and guide pipes located in the device outer frames. The bottom end of the guide pipe extends out of the lowermost device outer frame by a certain distance. The guide pipe is formed by connecting a plurality of sections of hollow pipes, and the plurality of sections of hollow pipes are connected through clamping rings; a vertically-arranged fixing rib is fixed to the inner wall face of the device outer frame, and a groove matched with the fixing rib and used for containing the fixing rib is formed in the periphery of the clamping ring. The anti-blocking auxiliary device for the concrete guide pipe of the cast-in-place pile with the limited inner diameter is favorable for saving concrete pouring time, and solves the problem that the guide pipe is blocked due to the small inner diameter of a reinforcement cage while ensuring concrete pouring, so that the pouring quality of the cast-in-place pile is ensured, and meanwhile, the on-site construction progress is promoted.

Description

Technical Field

[0001] This utility model relates to the technical field of building construction, and in particular to an auxiliary device for preventing jamming of concrete guide pipes in cast-in-place piles with limited inner diameter. Background Technology

[0002] Pile foundation engineering refers to a foundation consisting of piles embedded in soil or rock and a pile cap connected to the top of the piles, or a single pile foundation directly connected to a column. The process of organizing and implementing the construction of this pile foundation is called pile foundation engineering.

[0003] Nowadays, in pile foundation engineering, the form of reinforcing cages is no longer limited to single-row reinforcing cages. Sometimes, considering design economy and structural characteristics, double-row reinforcing cages are used in some areas. To avoid deformation of the double-row reinforcing cages due to collisions during transportation, hoisting, and lowering, a stiffening hoop is installed at intervals. However, this method has both advantages and disadvantages. The advantage is that it increases the overall stability of the reinforcing cage; the disadvantage is that when pouring concrete, because the tremor is not fixed, it is easy for it to be stuck by the stiffening hoop when it sways from side to side, increasing the time the tremor is buried in the concrete.

[0004] Traditional double-row reinforced cage pile foundation concrete pouring technology has the following shortcomings:

[0005] (1) The guide pipe used for pouring concrete needs to be installed section by section before being lowered. As the number of sections increases, the swing amplitude of the bottom guide pipe will become larger and larger when lowered, making it easier to collide with the steel cage. In severe cases, it will cause the steel cage to deviate, resulting in inconsistent thickness of the protective layer on both sides of the steel cage.

[0006] (2) The two sections of guide tube are connected by rubber rings and retaining rings. When the guide tube is pulled out, it wobbles from side to side and is easily caught by the retaining rings, making it difficult to pull out the guide tube, delaying the concrete pouring time, and the quality of the pile cannot be guaranteed. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide an auxiliary device for preventing the concrete guide pipe from getting stuck in a finite inner diameter cast-in-place pile. This device helps to save time when pouring concrete and solves the problem of the guide pipe getting stuck in the finite inner diameter of the reinforcing cage while ensuring the quality of the cast-in-place pile and promoting the progress of on-site construction.

[0008] To achieve the above objectives, this utility model provides an auxiliary device for preventing jamming of concrete guide pipes in cast-in-place piles with limited inner diameter. The device includes a multi-section outer frame that fits inside the inner row of reinforcing bars and is detachably connected to each other, and a guide pipe located inside the outer frame. The bottom end of the guide pipe extends a certain distance beyond the lowest section of the outer frame. The guide pipe is composed of multiple hollow pipe sections connected together by retaining rings. Vertically arranged fixing ribs are fixed to the inner wall of the outer frame, and the outer periphery of the retaining rings has grooves that are adapted to fit the fixing ribs and are used to place them.

[0009] Preferably, the cross-section of the outer frame of the device is an inscribed quadrilateral of the inner row of reinforcing steel cage stiffeners, and the four corners of the outer frame of the device are fitted with the inner row of reinforcing steel cage stiffeners.

[0010] Furthermore, the retaining ring includes two semi-circular clamps, one end of which is rotatably connected by a fixing pin, and the other end of which is provided with a radially outwardly extending connecting part. The two connecting parts are connected and fixed by a connecting rod.

[0011] Preferably, one of the connecting parts rotatably connects the connecting rod to the end of the connecting part via a shaft, and the other connecting part has an outward-facing U-shaped groove. After the two connecting parts are joined together, the connecting rod rotates into the U-shaped groove and is fixed with a nut that is threadedly connected to the connecting rod.

[0012] Preferably, the four corners of the outer frame of the device are arc-shaped, and a 3cm distance is left between the outer frame and the inner row of reinforcing steel cage stiffeners.

[0013] Preferably, the outer frames of two adjacent device sections are connected by a pin.

[0014] Furthermore, the first and last sections of the device frame have small holes at the bottom and top, respectively, while each other section of the device frame has small holes at the top and bottom, so that each section of the device frame can be connected by a pin.

[0015] Preferably, the inner side of the semi-circular clamp is provided with a rubber ring.

[0016] Furthermore, the top of the conduit is 50cm higher than the outer frame of the uppermost device, and a funnel for facilitating concrete pouring is installed at the top of the conduit.

[0017] In summary, compared with the prior art, the anti-jamming auxiliary device for concrete guide pipes of finite inner diameter cast-in-place piles of this utility model has at least the following beneficial effects:

[0018] (1) It helps save concrete pouring time and solves the problem of pipe jamming caused by the small inner diameter of the reinforcing cage while ensuring concrete pouring. It maximizes the saving of construction operation time and promotes the on-site construction progress while ensuring quality.

[0019] (2) This device can be regarded as a fixing device, which avoids problems such as rebar cage displacement caused by the collision of the guide pipe during construction.

[0020] (3) The size and position of the adjustable device can be adapted to steel cages with different narrow inner diameters, which simplifies the construction steps, saves installation time, and improves the stability of concrete pouring and duct installation, so as to provide a corresponding reference for pile foundation engineering. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view of the steel reinforcement cage;

[0023] Figure 2 This is an installation cross-sectional view of the anti-jamming auxiliary device for concrete guide pipes in cast-in-place piles with limited inner diameter according to this utility model;

[0024] Figure 3 This is a schematic diagram showing the connection between the outer frame and the fixing reinforcement of the anti-jamming auxiliary device for concrete guide pipes in cast-in-place piles with limited inner diameter according to this utility model.

[0025] Figure 4 This is a top view of the anti-jamming auxiliary device for concrete guide pipes in cast-in-place piles with limited inner diameter according to this utility model;

[0026] Figure 5 This is a schematic diagram showing the connection between the outer frames of the upper and lower sections of the device of this utility model;

[0027] Figure 6 This is an overall installation diagram of the anti-jamming auxiliary device for concrete guide pipes in cast-in-place piles with limited inner diameter according to this utility model.

[0028] Figure 7 This is a top view of the overall installation of the anti-jamming auxiliary device for concrete guide pipe of finite inner diameter cast-in-place pile of this utility model.

[0029] Figure 8 This is a schematic diagram of the retaining ring of this utility model.

[0030] In the diagram: 1-Fixing bar, 2-Outer frame of the device, 3-Clamping ring, 4-Inner row reinforcing cage stiffening hoop, 5-Inner row reinforcing cage longitudinal bar, 6-Inner row reinforcing cage hoop, 7-Support rod, 8-Outer row reinforcing cage stiffening hoop, 9-Outer row reinforcing cage longitudinal bar, 10-Outer row reinforcing cage hoop, 11-Conduit, 12-Pin, 13-Semi-circular clamp, 14-Connecting part, 15-Connecting rod, 16-Washer, 17-Nut. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] See below Figures 1-4 This invention provides a detailed description of the anti-jamming auxiliary device for concrete guide pipes in cast-in-place piles with limited inner diameter.

[0033] This utility model discloses an auxiliary device for preventing jamming of concrete guide pipes in cast-in-place piles with limited inner diameter. The device comprises a multi-section outer frame 2 that is fitted inside the inner row of reinforcing cages and detachably connected to each other, and a guide pipe 11 located inside the outer frame 2. The bottom end of the guide pipe 11 extends a certain distance beyond the lowest section of the outer frame 2. Vertically arranged fixing ribs 1 are fixed to the inner wall of the outer frame 2. A groove is formed on the outer periphery of a retaining ring 3 to accommodate the fixing ribs 1. The groove at the contact point between the fixing ribs 1 and the retaining ring 3 not only stabilizes the guide pipe 11 but also prevents it from shaking.

[0034] Reference Figure 3 and Figure 4 The outer frame 2 of the device is equipped with a fixing rib 1, which is welded to the outer frame 2 to form an integral whole. The fixing rib 1 is made of HPB300 plain round steel bar with a diameter of 12mm. Since the number of sections of the outer frame 2 of the device will change according to the length of the pile, in order to avoid material waste, the fixing rib 1 can be welded to only one section of the outer frame 2 of the device. This section is installed last to facilitate the lowering of the guide tube 11.

[0035] The inner row of reinforcing cages is located inside the double row of reinforcing cages. The double row of reinforcing cages consists of the outer row of longitudinal reinforcing cages (9), outer row of reinforcing cage stirrups (10), outer row of reinforcing cage stiffening hoops (8), support rods (7), inner row of longitudinal reinforcing cages (5), inner row of reinforcing cage stirrups (6), and inner row of reinforcing cage stiffening hoops (4). The outer frame 2 is placed inside the inner row of reinforcing cage stiffening hoops (4). Both the outer row of reinforcing cage stiffening hoops (8) and the inner row of reinforcing cage stiffening hoops (4) are circular in shape, serving to prevent deformation of the reinforcing cage.

[0036] The outer frame 2 of the device is rectangular in shape. Because the device needs to operate in a humid, water-rich environment, certain requirements are placed on the device itself. Therefore, the main body of this device is made of aluminum. The number of sections used in the device is determined by the length of the cast-in-place pile. Adjacent sections of the outer frame 2 are connected by pins 12. The first and last sections of the outer frame 2 have small holes at the bottom and top, respectively. Each other section of the outer frame 2 has small holes at the top and bottom to allow for connection via pins 12. This connection method allows for both free disassembly and reusability of the device.

[0037] The conduit 11 is composed of multiple hollow tube sections connected together, and these hollow tube sections are connected by retaining rings 3. For example... Figure 8 As shown, the retaining ring 3 includes two semi-circular clamps 13. One end of each clamp is rotatably connected by a fixing pin, and the other end of each clamp has a radially outwardly extending connecting portion 14. The two connecting portions 14 are connected and fixed together by a connecting rod 15. One connecting portion 14 has a shaft that rotatably connects the connecting rod 15 to its end. The other connecting portion 14 has an outwardly opening U-shaped groove. After the two connecting portions 14 are joined together, the connecting rod 15 rotates into the U-shaped groove and is fixed with a nut 17 threaded to the connecting rod 15. When connecting the conduit 11, the connection point of the two hollow tubes is located between the two semi-circular clamps 13 of the retaining ring 3. When the two connecting portions 14 are closed, the connecting rod 15 can be swung into the U-shaped groove, and the nut 17 can be tightened for fixation. To make the fixation of the connecting rod 15 to the U-shaped groove more stable, a washer 16 is provided below the nut 17 to increase the force-bearing area.

[0038] In addition, a rubber ring is provided on the inner side of the semi-circular clamp 13, and the conduit 11 is connected by a retaining ring 3. The retaining ring 3 has a rubber ring inside to ensure the airtightness of the conduit 11. The interfaces of the two conduit sections 11 are first aligned vertically, and then the rubber ring is put into the joint position of the two hollow tubes. After ensuring that the rubber ring completely seals the interface position of the conduit 11, the retaining ring 3 is put in.

[0039] After the steel cage is lowered, the device installation begins. The cross-section of the outer frame 2 is an inscribed quadrilateral of the inner row of steel cage stiffening hoops 4. The four corners of the outer frame 2 are fitted with the inner row of steel cage stiffening hoops 4 to help stabilize the device.

[0040] The anti-jamming auxiliary device of this utility model is evenly divided in length according to the cage length. The first section of the outer frame 2 is 1 meter long and is offset by 5 meters from the guide tube 11, ensuring that the bottom of the outer frame 2 is always offset from the bottom of the guide tube 11. The bottom of the guide tube 11 is always lower than the bottom of the outer frame 2 to prevent the device from being difficult to pull out after being buried in the concrete. The outer frame 2 is equipped with a fixing rib 1. The guide tube 11 is slowly lowered along the fixing rib 1 to ensure that the swing amplitude of the guide tube 11 is reduced during concrete pouring. After the concrete height is measured with a plumb bob to meet the requirements, the device is removed first, and then the guide tube 11 is pulled out, so that the two are always offset by a certain distance. The guide tube 11 is directly buried in the concrete. After the concrete reaches the specified height, the guide tube 11 is raised, and the outer frame of the device is offset from the guide tube 11, so that the concrete will not submerge the device.

[0041] Reference Figure 2 The outer frame 2 of the device is located inside the inner row of reinforcing cage stiffening hoops 4 of the double-row reinforcing cage, but it is hoisted separately from the double-row reinforcing cage. The four corners of the outer frame 2 are rounded, not triangular, to facilitate lowering. A 3cm distance is left between the four corners of the outer frame 2 and the inner row of reinforcing cage stiffening hoops 4 to prevent the device from being stuck by the reinforcing cage and thus unable to be pulled out.

[0042] In this utility model, a clamp fixing device is used, and a crane is used to lower the inner row of steel reinforcement cages at a uniform speed. When the cages are lowered to a position 1 meter above the casing (a part of the bored pile construction process, used for positioning, protecting the hole opening, and preventing debris from falling into the hole), the support rod 7 is installed between the inner row of steel reinforcement cage stirrups 6 and the outer steel reinforcement cage stiffening hoop 8, and the two ends are connected by welding, and the next section is lowered.

[0043] Reference Figure 6 , 7 The uppermost section of the conduit 11 is 50cm higher than the outer frame 2 of the uppermost device, which facilitates the installation of the funnel. The funnel is installed at the top of the conduit 11 to facilitate the pouring of concrete.

[0044] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any transformations or substitutions that can be understood by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of this utility model.

Claims

1. A limited inner diameter cast-in-place pile concrete pipe anti-blocking auxiliary device, characterized in that, The utility model provides a device outer frame (2) which is detachably connected with each other and is attached to the inside of the inner row of reinforcement cage, a guide pipe (11) which is located in the inside of the device outer frame (2) and whose bottom end extends out of the lowermost device outer frame (2) by a distance; The guide pipe (11) is connected by a plurality of hollow pipes, and the plurality of hollow pipes are connected by a snap ring (3); The inner wall surface of the device outer frame (2) is fixed with a vertical fixing rib (1), and the outer periphery of the snap ring (3) is formed with a groove which is matched with the fixing rib (1) and used for placing the fixing rib (1).

2. The anti-blocking auxiliary device for the concrete guide pipe of the limited-internal-diameter cast-in-place pile according to claim 1, characterized in that, The cross section of the device outer frame (2) is an inscribed quadrilateral of the inner row of reinforcement cage stiffening hoop (4), and the four corners of the device outer frame (2) are attached to the inner row of reinforcement cage stiffening hoop (4).

3. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 1, characterized in that, The snap ring (3) comprises two semicircular clamps (13), one end of the two semicircular clamps (13) is rotationally connected by a fixing pin, and the other end of the two semicircular clamps (13) is provided with a radially outwardly extending connecting part (14), and the two connecting parts (14) are connected and fixed by a connecting rod (15).

4. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 3, characterized in that, One of the connecting parts (14) is rotationally connected with the connecting rod (15) at the end of the connecting part (14) by a shaft, and the other connecting part (14) has a u-shaped groove with an opening facing outward, and after the two connecting parts (14) are combined together, the connecting rod (15) is rotated into the u-shaped groove and is fixed by a nut (17) which is screwed with the connecting rod (15).

5. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 1, characterized in that, The four corners of the device outer frame (2) are arc-shaped and leave a distance of 3cm from the inner row of reinforcement cage stiffening hoop (4).

6. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 1, characterized in that, The two adjacent device outer frames (2) are connected by a bolt (12).

7. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 6, characterized in that, The first device outer frame (2) and the last device outer frame (2) are respectively provided with small holes at the bottom and the top, and each of the other device outer frames (2) is provided with small holes at the top and the bottom, so as to connect each of the device outer frames (2) by the bolt (12).

8. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 3, characterized in that, The inner side surface of the semicircular clamp (13) is provided with a rubber ring.

9. The limited inside diameter cast-in-place pile concrete duct anti-blocking auxiliary device according to claim 1, characterized in that, The top end of the guide pipe (11) is 50cm higher than the uppermost device outer frame (2), and the top end of the guide pipe (11) is provided with a funnel which is convenient for pouring concrete.

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