A large-diameter pile hole construction device and method

Abstract

A construction device and method for large-diameter pile holes, comprising a top plate and a bottom plate. The top plate is connected to the bottom plate through a plurality of pneumatic picks. A plurality of convex teeth are fixedly connected to the bottom plate, and each convex tooth is evenly distributed around the axis of the bottom plate. A water inlet pipe is communicated at the center of the bottom plate. A slag suction pipe is arranged above the top plate. A drill pipe is threadedly connected to the top plate. The present invention is used to solve the problem of low efficiency of impact pile drivers.

Description

Technical Field

[0001] The present invention relates to a large-diameter pile hole construction device and method. Background Art

[0002] In the existing pile hole construction, a punching pile machine is generally used. After the hammer head is lifted to a certain height, the hammer head is suddenly released to freely fall, hitting the bottom of the pile hole, and then lifted again and suddenly released, repeating this cycle continuously, using the impact kinetic energy to squeeze soil and rock to sink the hole; this construction method has low construction efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a large-diameter pile hole construction device and method for solving the problem of low efficiency of the punching pile machine.

[0004] To solve the above technical problem, the present patent proposes the following technical solutions:

[0005] A large-diameter pile hole construction device includes a top plate and a bottom plate. The top plate is connected to the bottom plate through a plurality of pneumatic picks. A plurality of convex teeth are fixedly connected to the bottom plate, and each convex tooth is evenly distributed around the axis of the bottom plate. A water inlet pipe is communicated with the center of the bottom plate. A slag suction pipe is arranged above the top plate, and a drill pipe is threadedly connected to the top plate.

[0006] It further includes a guiding device. The guiding device includes a bracket anchored on the ground. A positioning sleeve and a hydraulic motor are fixedly connected to the bracket. A cutting groove is arranged in the positioning sleeve. A guide sleeve is arranged in the positioning sleeve. A limiting disk is arranged on the guide sleeve, and the limiting disk is located in the cutting groove. A plain bearing is arranged between the limiting disk and the cutting groove. The guide sleeve and the hydraulic motor are connected by gear transmission. A square rod is fixedly connected to the drill pipe, and the square rod is inserted into the square hole of the guide sleeve.

[0007] The exhaust pipe of the pneumatic pick passes through the bottom plate.

[0008] It includes that a plurality of convex teeth are impacted by the vibration of a plurality of pneumatic picks on the bottom rock and soil of the pile hole. At the same time, water is filled into the bottom of the pile hole through the water inlet pipe, and the mortar in the pile hole is extracted by the slag suction pipe. At the same time, the hydraulic motor drives the convex teeth to rotate.

[0009] The beneficial effect of the present invention is that: a plurality of pneumatic picks are used to drive a plurality of convex teeth to vibrate and compact the bottom of the pile hole, destroying the rock and soil at the bottom of the pile hole. At the same time, the tap water continuously conveyed by the water inlet pipe flushes the rock and soil vibrated out, and under the cooperation of the slag suction pipe, it is discharged from the pile hole. Therefore, continuous construction can be carried out without interruption, improving the construction efficiency. Brief Description of the Drawings

[0010] The following further describes the present invention with reference to the drawings:

[0011] Figure 1 It is a schematic cross-sectional structure diagram of the present invention,

[0012] Figure 2 is a schematic diagram of the structure of the bottom plate of the present invention,

[0013] Figure 3 It is a schematic diagram of the main structure of the present invention,

[0014] Figure 4 It is a schematic diagram of a partially enlarged structure of the present invention.

[0015] In the figure: square rod 1, gear 2, guide sleeve 3, positioning sleeve 4, bracket 5, drill rod 6, slag suction pipe 7, top plate 8, pneumatic pick 9, counterweight steel block 10, bottom plate 11, convex teeth 12, pneumatic pick exhaust pipe 13, water inlet pipe 14, plane bearing 15, limit plate 16, hydraulic motor 17. DETAILED DESCRIPTION

[0016] like Figures 1 to 4 As shown, a large-diameter pile hole construction device includes a circular top plate 8 and a bottom plate 11. The top plate 8 is connected to the bottom plate 11 through a plurality of pneumatic picks 9. A plurality of convex teeth 12 are fixedly connected to the bottom plate 11. The convex teeth 12 are evenly distributed around the axis of the bottom plate 11. A water inlet pipe 14 is connected to the center of the bottom plate 11. The water inlet pipe 14 is connected to tap water. A slag suction pipe 7 is provided above the top plate 8. The slag suction pipe 7 is connected to a mud pump. A drill rod 6 is threadedly connected to the top plate 8. The convex teeth 12 are made of high-carbon steel and have the same shape as a "rack".

[0017] It also includes a guiding device, which includes an H-shaped bracket 5 anchored on the ground, a positioning sleeve 4 and a hydraulic motor 17 are fixedly connected to the bracket 5, a groove is provided in the positioning sleeve 4, a guide sleeve 3 is provided in the positioning sleeve 4, a limiting plate 16 is provided on the guide sleeve 3, the limiting plate 16 is located in the groove, a plane bearing 15 is provided between the limiting plate 16 and the groove, the limiting plate 16 and the bearing are used to limit the guide sleeve 3 while reducing the friction between the guide sleeve 3 and the positioning sleeve 4, the guide sleeve 3 and the hydraulic motor 17 are connected through a gear 2, a square rod 1 is fixedly connected to the drill pipe 6, and the square rod 1 is inserted into the square hole of the guide sleeve 3.

[0018] The working process of the present invention is:

[0019] Step 1: After digging a pile hole on the ground, place the construction device into the pile hole, then fix the bracket 5 to the ground, measure the level of the bracket 5, install the square rod 1 into the square hole of the guide sleeve 3, then connect the water inlet pipe 14 to the tap water, fill the pile hole with water, and then start the jackhammer 9.

[0020] Step 2: The convex teeth 12 are driven by the pneumatic pick 9 to jump up and down, and the convex teeth 12 that jump up and down impact the rock and soil at the bottom of the pile hole. At the same time, the water inlet pipe 14 continuously delivers water to the bottom of the pile hole to flush out the impacted and broken rock and soil. The flushed rock and soil are mixed with water to become mud slurry, and the mud slurry is extracted from the pile hole by the slag suction pipe 7 to realize material discharge during drilling.

[0021] During the up-and-down movement of the convex tooth 12, the square rod 1 moves up and down in the guide sleeve 3 together. At the same time, the hydraulic motor 17 drives the guide sleeve 3 to rotate through the gear 2, so that the position of the convex tooth 12 rotates around the drill pipe 6 up and down with the up-and-down movement, ensuring that the pile hole is fed vertically downward and avoiding the collapse of the pile hole.

[0022] In addition, when the impact force of the convex tooth 12 on the rock and soil at the bottom of the pile hole is insufficient, a counterweight steel block is fixed on the top plate 8 to increase the weight of the construction device and enhance the impact of the convex tooth 12 on the rock and soil at the bottom of the pile hole.

[0023] The air pipe 13 of the pneumatic pick passes through the bottom plate 11 and extends below the bottom plate 11. During the operation of the pneumatic pick 9, the air discharged by the pneumatic pick 9 follows the tap water to impact the bottom of the rock and soil to form bubbles. During the upward floating of the bubbles, the rock and soil at the bottom of the pile hole can be carried away, improving the slag discharge effect of the rock and soil at the bottom of the pile hole.

[0024] Since this patent is a high-frequency continuous impact on the pile hole, and the impact frequency is much higher than that of the existing punching pile machines, the construction efficiency of the pile hole has been greatly improved.

Claims

1. A construction device for large-diameter pile holes, characterized in that: The invention comprises a top plate (8) and a bottom plate (11), wherein the top plate (8) is connected to the bottom plate (11) via a plurality of pneumatic picks (9), a plurality of convex teeth (12) are fixedly connected to the bottom plate (11), and each convex tooth (12) is evenly distributed around the axis of the bottom plate (11), a water inlet pipe (14) is connected to the center of the bottom plate (11), a slag suction pipe (7) is provided above the top plate (8), and a drill rod (6) is threadedly connected to the top plate (8); and the invention also comprises a guide device, wherein the guide device comprises a bracket (5) anchored on the ground, a positioning sleeve (4) and a hydraulic motor (17) are fixedly connected to the bracket (5), a groove is provided in the positioning sleeve (4), and a guide is provided in the positioning sleeve (4). A sleeve (3) is provided on the guide sleeve (3), the limit plate (16) is located in the cut groove, a plane bearing (15) is provided between the limit plate (16) and the cut groove, the guide sleeve (3) and the hydraulic motor (17) are connected by gear (2), a square rod (1) is fixedly connected to the drill rod (6), and the square rod (1) is inserted into the square hole of the guide sleeve (3). The method of using the construction device comprises the following steps: a plurality of pneumatic picks (9) vibrate the convex teeth (12) to impact the rock and soil at the bottom of the pile hole, and at the same time, water is poured into the bottom of the pile hole by the water inlet pipe (14), and mortar in the pile hole is extracted by the slag suction pipe (7), and at the same time, the hydraulic motor (17) drives the convex teeth (12) to rotate.

2. The large-diameter pile hole construction device according to claim 1, characterized in that: The jackhammer exhaust pipe (13) passes through the bottom plate (11).

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