A long spiral drilling pressure grouting pile reinforcement cage pressing device

Abstract

The utility model discloses a long spiral drilling pressure grouting pile reinforcement cage down -pressing device, including the base of acrossing in the top position of stake groove, and the guide cage mouth of being cooperated with reinforcement cage is set up on the base, still include the down -pressing mechanism of down -pressing reinforcement cage from the lower side position of reinforcement cage, and the down -pressing mechanism includes the down -pressing arm of adjustable length setting, and the down -pressing arm overturn is driven through hydraulic structure, and the end of down -pressing arm is installed with the pressure hook, and the pressure hook is slidably connected on the down -pressing arm through spring sliding structure, still include the swing mechanism of driving down -pressing mechanism swing, and down -pressing mechanism installs in the top of swing mechanism, and the posture of the reinforcement cage is adjusted through swing mechanism swing and push reinforcement cage and lower position. The above -mentioned structure realizes from the down -pressing stake cage of stake cage's near stake groove mouth position, has solved the technical defects of the deformation of stake cage that excavator bucket down -pressing stake cage easily leads to in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of spiral grouting pile construction technology, and in particular relates to a device for pressing down the reinforcing cage of a long spiral drilled pressure grouting pile. Background Technology

[0002] In building construction, cast-in-place pile construction is frequently required. This construction mainly includes drilling the pile trench, placing the reinforcing cage into the trench, and pouring concrete. The order of concrete pouring and placing the reinforcing cage into the trench varies depending on the type of cast-in-place pile. The most common method is to place the reinforcing cage first, followed by concrete pouring; this method is the simplest.

[0003] However, in the construction of spiral drilled pressure grouting piles, concrete is first poured into the pile trench, and then a spiral-structured steel cage is placed in. The bottom of the steel cage has a conical structure, which is intended to reduce concrete resistance during the lowering of the pile cage.

[0004] However, in actual operation, because concrete is poured first in this type of cast-in-place pile, the resistance during the lowering of the reinforcing cage is greatly affected by factors such as concrete buoyancy. During the lowering process, existing technology uses an excavator bucket to press down on the top of the reinforcing cage to ensure smooth insertion of the pile to the bottom. This method does indeed apply very high downward pressure. However, as the reinforcing cage overcomes the concrete resistance and is lowered to a certain depth, the volume of the pile cage embedded in the concrete increases, resulting in significant buoyancy. At this point, it is necessary to increase the downward pressure of the excavator bucket. Since the reinforcing cage itself is formed by binding reinforcing bars, excessive bucket pressure can easily bend or deform the reinforcing cage. The reason is that the bucket cannot guarantee that the downward pressure is perpendicular to the axis of the rebar cage. If the pressure is too high during the downward pressing process, the misalignment force will be too large, forming a torque. Secondly, the bucket presses down on the top of the rebar cage. If the length of the rebar cage inserted into the concrete during construction is insufficient (especially for long rebar cages), the bucket will press down on the top of the rebar cage, while a large portion of the rebar cage will be exposed outside the pile trench. Therefore, the misalignment torque will be even greater, making it very easy to bend the rebar cage. This is especially true for rebar cages tied with low-grade rebar.

[0005] Therefore, in actual work, if the steel cage can be pulled down from the position near the pile trench opening, it is not only possible to press down the steel cage with less pressure, but it is also less likely to cause deformation of the steel cage. Utility Model Content

[0006] Based on the above background, the purpose of this utility model is to provide a device for pressing down the reinforcing cage of a long spiral drilled grouting pile.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A device for pressing down a reinforcing cage in a long spiral drilled grouting pile includes a base spanning the top of the pile trench, and a guide cage opening on the base that cooperates with the reinforcing cage. It also includes a pressing mechanism that presses down the steel cage from a lower position. The pressing mechanism includes a pressing arm with an adjustable length, which is driven to rotate by a hydraulic structure. A pressure hook is installed at the end of the lower pressure arm, and the pressure hook is slidably connected to the lower pressure arm through a spring sliding structure; It also includes a swing mechanism that drives the downward pressing mechanism to swing, with the downward pressing mechanism mounted on top of the swing mechanism; The lowering posture of the steel cage is adjusted by swinging the steel cage through a swinging mechanism.

[0008] Preferably, a fixed base is integrally formed on both sides of the base; The swing mechanism includes a turntable rotatably connected to a fixed base, and a lower pressure arm hinged to the top outer side of the turntable.

[0009] Preferably, the lowering arm includes a fixed arm hinged to the turntable, and the fixed arm is slidably connected to an adjusting arm; The fixed arm and the adjusting arm are locked together by a bolt adjustment structure.

[0010] Preferably, the bolt adjustment structure includes several positioning through holes distributed along the length of the adjustment arm, a pin screw is slidably connected to the fixed arm, the pin screw passes through the positioning through holes, and a nut is threaded to the bottom of the pin screw.

[0011] Preferably, the swing mechanism further includes a first hydraulic push rod and a second hydraulic push rod respectively hinged and installed on both sides of the top of the turntable; The cylinders of the first hydraulic push rod and the second hydraulic push rod are respectively hinged to the fixed base, and the plunger rods of the first hydraulic push rod and the second hydraulic push rod are hinged to the top edge of the turntable.

[0012] Preferably, the piston rods of the first hydraulic push rod and the second hydraulic push rod are respectively fixedly mounted with push handle rods, the ends of the push handle rods are fixedly connected with hinge caps, and the top of the turntable is welded with a pin rod that connects to the hinge cap.

[0013] Preferably, the spring sliding structure includes a T-shaped slide rod fixedly connected to the pressure hook, and the T-shaped end of the T-shaped slide rod is slidably connected to the adjusting arm. A return spring is fitted onto the T-shaped slide rod, with its two ends fixed to the side walls of the pressure hook and the adjusting arm facing each other.

[0014] Preferably, the hydraulic structure includes a hydraulic cylinder hinged to the inner side of the top of the turntable, and the pushing end of the hydraulic cylinder is hinged to the outer side of the bottom of the adjusting arm.

[0015] Preferably, the piston rod of the hydraulic cylinder is threadedly connected to an adjustable pull rod with an adjustable length. The upper end of the adjustable pull rod is fixedly connected to a hinge tongue, and the bottom of the adjusting arm is fixedly connected to a U-shaped hinge seat with a hinge tongue.

[0016] This utility model has the following beneficial effects: 1. The method of hydraulically pressing down the steel cage from the lower end of the pile trench to pull it into the pile trench can fundamentally avoid the technical defects of steel cage deformation.

[0017] 2. During operation, the steel reinforcement cage is pressed into the pile trench downwards using the cooperation of the double-sided pressing arms. Because this pressing method targets the steel reinforcement cage near the trench opening, it ensures high stability and reduces the risk of displacement or bending. This method also makes it easier to press the cage in. After pressing, the hydraulic cylinder pushes the pressing arms upwards, and the pressing hooks, with the help of the spring sliding structure, reset to prepare for pressing down again at the location of the upper and lower stirrups of the steel reinforcement cage. This process is repeated until the entire steel reinforcement cage is completely pressed into the pile trench.

[0018] 3. The posture of the steel cage is adjusted by a swing mechanism. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the adjusting arm with the pressure hook in an embodiment of this utility model; Figure 3 This is a schematic diagram of the hinged installation structure of the adjusting arm and hydraulic cylinder in an embodiment of this utility model; Figure 4 This is a schematic diagram of the steel cage being pressed down in an embodiment of this utility model; Figure 5 This is an embodiment of the present utility model. Figure 1 Top view in the middle; Figure 6 This is a schematic diagram of the spring sliding structure in an embodiment of the present invention.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] Example 1: like Figure 1-6 As shown, a device for pressing down a reinforcing cage in a long spiral drilled grouting pile includes a base 2 spanning across the top of the pile trench (the base 2 is placed horizontally at the pile opening of the grouting pile). The base 2 also has a guide cage opening that cooperates with the reinforcing cage.

[0026] During pouring, concrete is poured directly from the guide cage opening. Subsequently, a crane lifts the reinforcing cage 1 to a vertical position. In the initial stage, the reinforcing cage 1 can be lowered and embedded in concrete in a conventional manner, such as by using the bucket of an excavator. After the concrete length exceeds half of the cage length, as the embedment depth of the reinforcing cage 1 increases, the downward pressure of the bucket needs to be increased, which can easily cause deformation of the reinforcing cage 1. Therefore, in order to solve this technical problem, this utility model adopts a hydraulic pressing method to press down the reinforcing cage 1 from the position near the pile trench opening, that is, to pull the reinforcing cage 1 into the pile trench from the lower end. This method can fundamentally avoid the technical defect of deformation of the reinforcing cage 1 (even if there is a misalignment force, the torque of the misalignment force is small because the pressing position is near the pile trench opening of the reinforcing cage 1).

[0027] Therefore, the above structure also includes a pressing mechanism 3 that presses down on the lower side of the reinforcing cage 1. The pressing mechanism 3 includes a pressing arm with an adjustable length. Specifically, fixed bases 21 are integrally formed on both sides of the base 2; the pressing arm is hinged to the top outer side of the turntable 41 described below.

[0028] Specifically, the lowering arm includes a fixed arm 31 hinged to the turntable 41 described below (a hinge plate is welded to the fixed arm 31, and a long U-shaped seat 311 is welded to the top of the turntable 41, with the hinge plate hinged to the upper end of the long U-shaped seat via a pin), and an adjusting arm 32 slidably connected to the fixed arm 31 (the fixed arm 31 is a cuboid arm with a cuboid sliding wall); the fixed arm 31 and the adjusting arm 32 are locked together by a bolt adjustment structure.

[0029] Specifically, the bolt adjustment structure includes several positioning through holes distributed along the length of the adjustment arm 32. A pin screw A is slidably connected to the fixed arm 31. The pin screw A passes through the positioning through holes, and a nut is threaded to the bottom of the pin screw A.

[0030] The above structure allows for adjustment of the length of the fixing arm 31 according to the thickness of the reinforcing cage 1. If the reinforcing cage 1 is small, the length of the lower pressure arm needs to be adjusted in order to be able to be pulled up to the reinforcing cage 1. The method is as follows: pull out the pin screw A, slide it to adjust, and then reinsert it again through the positioning through hole of the next position and tighten the nut for positioning.

[0031] Meanwhile, the lower arm is driven to rotate by a hydraulic structure; specifically, the hydraulic structure includes a hydraulic cylinder 34 hinged to the inner side of the top of the turntable 41 (a hinge tongue is welded to the cylinder barrel of the hydraulic cylinder 34, and a short U-shaped hinge seat is welded to the top of the turntable 41, with the hinge tongue hinged to the short U-shaped hinge seat by a pin).

[0032] Meanwhile, the push end of the hydraulic cylinder 34 is hinged to the bottom outer side of the adjusting arm 32.

[0033] Specifically, the piston rod of the hydraulic cylinder 34 is threadedly connected to an adjustable rod with an adjustable length, that is, the adjustable rod is an adjustable rod 341 with a threaded structure on the outside, and correspondingly, a matching threaded groove is opened on the piston rod.

[0034] The purpose of adjusting the length of the tie rod 341 is that after adjusting the length of the lower arm according to the size of the steel cage 1, the length of the tie rod 341 needs to be adjusted accordingly.

[0035] Specifically, a hinge tongue is fixedly connected to the upper end of the adjusting rod 341, and a U-shaped hinge seat with the hinge tongue is fixedly connected to the bottom of the adjusting arm 32. The hinge tongue is inserted into the U-shaped hinge seat via a pin.

[0036] After adjusting the length of the tie rod 341, insert the hinge tongue into the U-shaped opening on the U-shaped hinge seat and reinsert the pin.

[0037] In actual operation, a nut that is easy to tighten with a wrench can be welded onto the adjusting rod 341. The hinge tongue fixedly connected to the upper end of the adjusting rod 341 includes a hinge tongue seat threaded onto the adjusting rod 341, and a hinge tongue steel plate is welded onto the hinge tongue seat.

[0038] The end of the aforementioned lower pressure arm (adjusting arm 32) is equipped with a pressure hook 33, which is slidably connected to the lower pressure arm via a spring sliding structure.

[0039] The hook 33 is shaped like a hook pile, with an flared opening. During operation, after adjusting the distance between the lower pressure arm-hook 33 and the reinforcing cage 1 as described above, the hydraulic cylinder 34 pulls the hinged lower pressure arm downwards so that the hook 33 presses down on the stirrups of the reinforcing cage 1 (the hook 33 extends along the gap between the longitudinal bars of the reinforcing cage 1). With the cooperation of the lower pressure arms on both sides, the reinforcing cage 1 is pressed into the pile trench in a downward "pressing" manner.

[0040] Because this pressing method uses a point near the pile trench opening of the reinforcing cage 1, it offers high stability and prevents the reinforcing cage 1 from shifting or bending during the pressing process. Furthermore, this method allows for easier pressing of the reinforcing cage 1 into place.

[0041] During the pressing process, the pressure hook 33 continuously adjusts the relative posture between the pressure hook 33 and the steel cage 1 through the extension and retraction of the spring sliding structure, ensuring that the pressure hook 33 presses down on the steel cage 1 in a stable pressing posture.

[0042] After the downward pressure is completed, the hydraulic cylinder 34 pushes the downward pressure arm to flip upward. At this time, the pressure hook 33, with the cooperation of the spring sliding structure, resets and prepares to press down again on the position of the upper and lower stirrups of the steel cage 1.

[0043] This process is repeated until the entire steel cage 1 is completely pressed into the pile trench.

[0044] Example 2: like Figure 1-6 As shown, based on the structure of Embodiment 1, the spring sliding structure includes a T-shaped slide rod 3311 fixedly connected to the pressure hook 33. The T-shaped end of the T-shaped slide rod 3311 is slidably connected to the adjusting arm 32 (a matching sliding cavity is provided in the adjusting arm 32). At the same time, a return spring 331 is fitted on the T-shaped slide rod 3311, and the two ends of the return spring 331 are respectively fixed to the side walls of the pressure hook 33 and the adjusting arm 32 facing each other.

[0045] During the extension and retraction process, the T-shaped slide bar 3311 slides within the sliding cavity to a limit.

[0046] Example 3: like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 2, in actual operation, the lowering of the rebar cage 1 cannot be completely vertical. If the posture of the rebar cage 1 is incorrect, an offset force will be generated during the pressing process. At this time, it is necessary to adjust the posture of the rebar cage 1, including front-back orientation adjustment. The front-back orientation adjustment adopts the adjustment of the lowering arm-hook 33 structure, that is, the outer wall of the hook 33 abuts against the outer wall of the rebar cage 1. Under the drive of the hydraulic cylinder 34 on one side, the lowering arm-hook 33 flips and pushes the rebar cage 1 to move in the front-back orientation.

[0047] If the steel cage 1 is misaligned to the left or right, the downward pressing mechanism 3 needs to be adjusted to push the steel cage 1 to the left or right to adjust its posture.

[0048] Therefore, it also includes a swing mechanism that drives the lowering mechanism 3 to swing, and the lowering mechanism 3 is installed on top of the swing mechanism 4; the lowering posture of the steel cage 1 is adjusted by swinging the steel cage 1 through the swing mechanism 4.

[0049] The swing mechanism 4 includes a turntable 41 rotatably connected to a fixed base (same as the existing rotatable connection method, with a rotating shaft fixed at the bottom center of the turntable 41, and the rotating shaft rotatably connected to a bearing installed on the fixed base 21). The swing mechanism also includes a first hydraulic push rod 42 and a second hydraulic push rod 43 respectively hinged to the top two sides of the turntable 41.

[0050] The cylinders of the first hydraulic push rod 42 and the second hydraulic push rod 43 are respectively hinged to the fixed base, and the plunger rods of the first hydraulic push rod 42 and the second hydraulic push rod 43 are hinged to the top edge of the turntable 41.

[0051] Specifically, the piston rods of the first hydraulic push rod 42 and the second hydraulic push rod 43 are respectively fixedly installed with push handle rods, and the ends of the push handle rods are fixedly connected with hinge caps. The top of the turntable 41 is welded with a pin rod that connects to the hinge cap.

[0052] During operation, when the rebar cage 1 is misaligned, the hydraulic cylinder 34 drives the lower pressure arm-hook 33 to flip upwards and extend from the gap between the longitudinal ribs of the rebar cage 1. At this time, the first hydraulic push rod 42 and the second hydraulic push rod 43 cooperate to drive the turntable 41 to rotate in the same direction as the misalignment of the rebar cage 1. Subsequently, the hydraulic cylinder 34 drives the lower pressure arm-hook 33 to flip downwards until it can swing onto the rebar cage 1. Then, the first hydraulic push rod 42 and the second hydraulic push rod 43 cooperate to push the turntable 41 to rotate in the opposite direction. During the rotation, the lower pressure arm-hook 33 abuts against the rebar cage 1 and generates a pushing force. This method corrects the posture of the rebar cage 1.

[0053] The first hydraulic push rod 42 and the second hydraulic push rod 43 cooperate to drive the turntable 41 to rotate, which is a conventional method disclosed in the prior art. For example, the first hydraulic push rod 42 pushes the plunger rod to extend, and the second hydraulic push rod 43 retracts the plunger rod. The first hydraulic push rod 42 and the second hydraulic push rod 43 on both sides cooperate to form the power to drive the turntable 41 to rotate, and at the same time form the thrust to push the steel cage 1 to correct its posture.

[0054] Example 4: like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 3, the first hydraulic push rod 42 and the second hydraulic push rod 43 cooperate to drive the turntable 41 to rotate, which is a conventional structure disclosed in the prior art hydraulic system. Similarly, the operation of the hydraulic cylinder 34 is also a conventional working principle structure disclosed in the prior art hydraulic system technology.

[0055] Similar to existing hydraulic systems, the aforementioned hydraulic cylinder 34 and hydraulic rod work together through a hydraulic system. The main components include a hydraulic oil tank, hydraulic oil pipelines for pumping and returning hydraulic oil, and valves controlling the pumping and returning of hydraulic oil to and from the hydraulic cylinder 34 (rod). If the hydraulic cylinder 34 needs to operate while the other hydraulic rods remain inactive, this can be controlled via corresponding valves.

[0056] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A device for pressing down the reinforcing cage of a long spiral drilled grouting pile, characterized in that, This includes a base spanning the top of the pile trench, with a guide opening on the base to cooperate with the reinforcing cage; It also includes a pressing mechanism that presses down the steel cage from a lower position. The pressing mechanism includes a pressing arm with an adjustable length, which is driven to rotate by a hydraulic structure. A pressure hook is installed at the end of the lower pressure arm, and the pressure hook is slidably connected to the lower pressure arm through a spring sliding structure; It also includes a swing mechanism that drives the downward pressing mechanism to swing, with the downward pressing mechanism mounted on top of the swing mechanism; The lowering posture of the steel cage is adjusted by swinging the steel cage through a swinging mechanism.

2. The long spiral drilled grouting pile reinforcement cage pressing device according to claim 1, characterized in that, The base has a fixed base integrally formed on both sides; The swing mechanism includes a turntable rotatably connected to a fixed base, and a lower pressure arm hinged to the top outer side of the turntable.

3. The long spiral drilling and grouting pile reinforcement cage pressing device according to claim 2, characterized in that, The lowering arm includes a fixed arm hinged to the turntable, and an adjusting arm is slidably connected to the fixed arm; The fixed arm and the adjusting arm are locked together by a bolt adjustment structure.

4. The long spiral drilling and grouting pile reinforcement cage pressing device according to claim 3, characterized in that, The bolt adjustment structure includes several positioning through holes distributed along the length of the adjustment arm. A pin screw is slidably connected to the fixed arm, the pin screw passes through the positioning through holes, and a nut is threaded to the bottom of the pin screw.

5. The long spiral drilled grouting pile reinforcement cage pressing device according to claim 3, characterized in that, The swing mechanism also includes a first hydraulic push rod and a second hydraulic push rod respectively hinged and installed on both sides of the top of the turntable; The cylinders of the first hydraulic push rod and the second hydraulic push rod are respectively hinged to the fixed base, and the plunger rods of the first hydraulic push rod and the second hydraulic push rod are hinged to the top edge of the turntable.

6. The long spiral drilling and grouting pile reinforcement cage pressing device according to claim 5, characterized in that, The piston rods of the first hydraulic push rod and the second hydraulic push rod are respectively fixedly mounted with push handle rods, and the ends of the push handle rods are fixedly connected with hinge caps. The top of the turntable is welded with a pin rod that connects to the hinge cap.

7. The long spiral drilling and grouting pile reinforcement cage pressing device according to claim 3, characterized in that, The spring sliding structure includes a T-shaped slide rod fixedly connected to the pressure hook, and the T-shaped end of the T-shaped slide rod is limited and slidably connected to the adjusting arm; A return spring is fitted onto the T-shaped slide rod, with its two ends fixed to the side walls of the pressure hook and the adjusting arm facing each other.

8. The long spiral drilled grouting pile reinforcement cage pressing device according to claim 4, characterized in that, The hydraulic structure includes a hydraulic cylinder hinged to the inner side of the top of the turntable, and the pushing end of the hydraulic cylinder hinged to the outer side of the bottom of the adjusting arm.

9. The long spiral drilled grouting pile reinforcement cage pressing device according to claim 8, characterized in that, The piston rod of the hydraulic cylinder is threadedly connected to an adjustable pull rod with an adjustable length. The upper end of the adjustable pull rod is fixedly connected to a hinge tongue, and the bottom of the adjusting arm is fixedly connected to a U-shaped hinge seat with a hinge tongue.

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