Anti-sloughing hole supporting structure for rotary excavating construction

Abstract

The utility model discloses a rotary excavating construction anti-sloughing hole supporting structure which comprises a plurality of pile casings, horn-shaped sleeves are arranged at the bottoms of the pile casings, the tops of the pile casings are inserted into the sleeves of the adjacent pile casings above in a sliding mode, a plurality of through installation grooves are formed in the side walls of the sleeves at intervals in the circumferential direction, and the installation grooves are communicated with the pile casings. And movable plates are rotationally arranged in the mounting grooves, clamping blocks are fixedly arranged at the bottoms of the inner side walls of the movable plates, and through grooves matched with the clamping blocks are formed in the positions, above the mounting grooves, of the top of the side wall of the pile casing. Through the arrangement, after concrete is poured, the uppermost pile casing is lifted to drive other pile casings in a pile hole to move upwards.

Description

Technical Field

[0001] This utility model belongs to the field of building equipment technology, and specifically relates to a support structure for anti-collapse holes in rotary drilling construction. Background Technology

[0002] Rotary drilling piles are formed by loading broken rock and soil into a drill bucket with a movable gate at the bottom, which is then lifted out by the drilling rig's lifting device. During drilling, the drill bit damages the original soil structure, making the soil around the hole wall unstable. To prevent the soil from collapsing, the existing technology generally uses a casing to support the inner wall of the formed pile hole. However, the depth of rotary drilling pile holes varies, requiring casings of various lengths to be customized according to the geological survey report, resulting in high costs and long production cycles.

[0003] In related prior art, such as Chinese Patent No. CN222252072U, a device for preventing collapse during construction of ultra-large karst pile foundations is disclosed. This solution includes multiple protective cylinders that are connected and nested one inside the other. Each protective cylinder includes an inner layer and an outer layer, with the outer layer completely covering the inner layer. The inner wall of each protective cylinder is provided with hooks for lifting the cylinder. This solution utilizes multiple protective cylinders connected by nesting to support the inner wall of pile holes of various depths.

[0004] To further reduce production costs, existing technologies generally remove the casing after the concrete inside the rotary drilling pile has reached initial set. In the above-mentioned scheme, hooks are installed on the inner wall of the protective casing, which means that the protective casing can only be lifted out of the pile hole one by one before the concrete is poured. Moreover, this process requires multiple lifting operations, and the protective casing is prone to collision with the inner wall of the pile hole, causing the pile hole to collapse. As a result, the above-mentioned scheme has a poor effect on preventing the collapse of the hole. Utility Model Content

[0005] The present invention aims to provide a support structure for anti-collapse holes in rotary drilling construction to solve the problem of poor anti-collapse hole performance in the above-mentioned solutions.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary drilling anti-collapse hole support structure includes a casing, wherein multiple casings are provided, and the bottom of the casing has a funnel-shaped sleeve. The top of each casing is slidably inserted into the sleeve of the adjacent casing above it. The side wall of the sleeve is provided with multiple through mounting grooves at intervals along the circumference. A movable plate is rotatably installed in each mounting groove. A locking block is fixedly installed at the bottom of the inner side wall of the movable plate. The top of the side wall of the casing is provided above each mounting groove with a through groove that cooperates with the locking block.

[0008] The principle and effects of this technical solution:

[0009] After the pile hole is excavated and shaped on the ground using rotary drilling equipment, a first casing is placed on the bottom wall of the pile hole, with the sleeve of the casing abutting against the bottom wall of the pile hole. Then, the next casing is placed into the pile hole, with the top of the first casing inserted into the sleeve of the next casing. As the first casing moves upward relative to the next casing, the top of the first casing contacts each locking block first, pushing each locking block and the corresponding movable plate to rotate outward from the sleeve. When the top of the first casing abuts against the inner wall of the next casing, the next casing is placed on top of the first casing, and each locking block is respectively locked in the corresponding through groove. The above steps are repeated until the uppermost casing protrudes from the ground. After placing the reinforcing cage inside the casing and pouring concrete, the uppermost casing is lifted, and the movable plates installed on each sleeve move upward accordingly. As each locking block moves upward with the corresponding movable plate, it pushes the adjacent casing below to move upward.

[0010] With the above-mentioned configuration, the movable plate on the side wall of the sleeve can be rotated to lock the locking block on the movable plate installed on each sleeve into the through groove of the adjacent sleeve below when the sleeves are stacked. This allows the remaining sleeves in the pile hole to move upward by lifting the top sleeve after the concrete is poured, thus solving the problem of poor anti-collapse hole effect in the above scheme.

[0011] In this invention, a guide slope is provided at the bottom of the inner sidewall of the locking block. This design allows the protective sleeve to easily push open the locking blocks and corresponding movable plates on the adjacent upper sleeve.

[0012] In this utility model, the inner sidewall of the sleeve is provided with a trapezoidal guide groove below each mounting groove, and a limiting groove is provided on the top wall of the guide groove. The mounting groove extends to the inner sidewall of the limiting groove. A limiting block is fixedly provided on the outer sidewall of the protective sleeve above each through groove, and each limiting block is slidably inserted into the corresponding limiting groove.

[0013] The principle and effects of this technical solution:

[0014] When lowering a sleeve, first insert the limiting block on the lower sleeve into the guide groove of the adjacent upper sleeve. Continue to lower the sleeve, and the top of the limiting block contacts the inclined side wall of the guide groove, pushing the next sleeve to rotate. When the limiting block is aligned with the limiting groove, the limiting block slides into the limiting groove.

[0015] By inserting the limiting block into the limiting groove, the through groove on the side wall of each protective sleeve can be aligned with the mounting groove on the adjacent sleeve above, thereby ensuring that each locking block can be locked in the corresponding through groove.

[0016] In this invention, hinge seats are fixedly provided on both sides of each mounting groove on the outer wall of the sleeve, and connecting seats are fixedly provided on the outer wall of the movable plate. The connecting seats are lower than the top surface of the movable plate. Bolts are threaded through the side walls of each hinge seat, and the end of each bolt near the connecting seat is rotatably inserted into the connecting seat. Through the above arrangement, the movable plate is rotatably mounted in the mounting groove. When the top of the lower protective sleeve passes the connecting seat, it can compress the movable plate, causing the movable plate to undergo elastic deformation and possessing a large elastic force. When the top of the limiting block abuts against the top wall of the limiting groove, it ensures that the locking block can be locked in the corresponding through groove.

[0017] In this invention, a magnet is fixedly installed at the bottom of the outer side wall of the movable plate, with the bottom surface of the magnet lower than the bottom surface of the movable plate. This arrangement allows the magnet on the outer side wall of the movable plate to magnetically connect with the outer side wall of the casing, ensuring the movable plate remains vertical during casing lowering and preventing it from swaying and becoming stuck in the inner wall of the pile hole, thus improving the smoothness of casing lowering.

[0018] In this invention, a soil-squeezing block is fixedly installed on the outer wall of the sleeve below each mounting groove. This arrangement allows the soil-squeezing block to press against the inner wall of the pile hole during the lowering of the casing, forming a groove that provides operating space for the rotating movable plate and prevents soil from obstructing the block from getting stuck in the groove.

[0019] In this invention, the top wall of the through groove is provided with a semi-circular notch. This design facilitates the installation of the hook by workers, improving the practicality of the device. Attached Figure Description

[0020] Figure 1 This is an isometric sectional view of the present invention;

[0021] Figure 2 This is a partial isometric sectional view of the present invention in use.

[0022] Figure 3 This is a partial isometric sectional view of the present invention in its second usage state;

[0023] Figure 4 This is a partial isometric sectional view of the present invention in use.

[0024] Figure 5 This is a partial isometric sectional view of the present invention in use.

[0025] Figure 6 This is an exploded view of some components of this utility model. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0027] The reference numerals in the accompanying drawings of the instruction manual include: 10, casing; 11, through groove; 12, limiting block; 13, notch; 20, sleeve; 21, mounting groove; 22, limiting groove; 23, guide groove; 24, hinge seat; 25, extrusion block; 30, movable plate; 31, locking block; 32, guide ramp; 33, connecting seat; 34, magnet; 40, bolt.

[0028] Example:

[0029] As attached Figure 1-6 As shown, this utility model discloses a support structure for anti-collapse holes in rotary drilling construction, including a casing 10. Multiple casings 10 are provided. The bottom of the casing 10 has a trumpet-shaped sleeve 20. The top of each casing 10 is slidably inserted into the sleeve 20 of the adjacent casing 10 above it. The side wall of the sleeve 20 is provided with multiple through mounting grooves 21 at intervals along the circumference. A movable plate 30 is rotatably installed in each mounting groove 21. A locking block 31 is fixedly installed at the bottom of the inner side wall of the movable plate 30. The top of the side wall of the casing 10 is provided above each mounting groove 21 with a through groove 11 that cooperates with the locking block 31.

[0030] In this embodiment, a guide ramp 32 is provided at the bottom of the inner sidewall of the card block 31.

[0031] In this embodiment, the inner sidewall of the sleeve 20 is provided with a trapezoidal guide groove 23 below each mounting groove 21, and a limiting groove 22 is formed on the top wall of the guide groove 23. The mounting groove 21 extends to the inner sidewall of the limiting groove 22. A limiting block 12 is fixedly provided on the outer sidewall of the protective sleeve 10 above each through groove 11, and each limiting block 12 is slidably inserted into the corresponding limiting groove 22.

[0032] In this embodiment, the outer side wall of the sleeve 20 is fixedly provided with hinge seats 24 on both sides of each mounting groove 21, and the outer side wall of the movable plate 30 is fixedly provided with a connecting seat 33. The connecting seat 33 is lower than the top surface of the movable plate 30. Each hinge seat 24 has a bolt 40 threaded through its side wall, and each bolt 40 is rotatably inserted into the connecting seat 33 at the end near the connecting seat 33.

[0033] In this embodiment, a magnet 34 is fixedly provided at the bottom of the outer side wall of the movable plate 30, and the bottom surface of the magnet 34 is lower than the bottom surface of the movable plate 30.

[0034] In this embodiment, the outer side wall of the sleeve 20 is fixedly provided with soil-squeezing blocks 25 below each mounting groove 21.

[0035] In this embodiment, the top wall of the through groove 11 is provided with a semi-circular notch 13.

[0036] The specific implementation process is as follows:

[0037] After the pile hole is excavated and shaped on the ground using rotary drilling equipment, a first casing 10 is placed on the bottom wall of the pile hole, with the sleeve 20 of the casing 10 abutting against the bottom wall of the pile hole. Then, a next casing 10 is placed into the pile hole, with the top of the first casing 10 inserted into the sleeve 20 of the next casing 10. During the upward movement of the first casing 10 relative to the next casing 10, the top of the first casing 10 first contacts each locking block 31, pushing each locking block 31 and the corresponding movable plate 30 to rotate outward from the sleeve 20. When the top of one casing 10 abuts against the inner wall of the next casing 10, the next casing 10 is placed on the first casing 10, and each locking block 31 is respectively locked in the corresponding through groove 11. The above steps are repeated until the uppermost casing 10 extends out of the ground. After placing the steel cage in the casing 10 and pouring concrete, the uppermost casing 10 is lifted, and the movable plate 30 installed on each sleeve 20 moves upward accordingly. During the upward movement of each locking block 31 with the corresponding movable plate 30, it pushes the adjacent casing 10 below to move upward.

[0038] When lowering a protective sleeve 10, the limiting block 12 on the lower protective sleeve 10 is first inserted into the guide groove 23 of the adjacent upper sleeve 20. As the next protective sleeve 10 is lowered, the top of the limiting block 12 contacts the inclined side wall of the guide groove 23 and pushes the next protective sleeve 10 to rotate. When the limiting block 12 is aligned with the limiting groove 22, the limiting block 12 slides into the limiting groove 22.

[0039] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A support structure for preventing collapse during rotary drilling, characterized in that, include: The protective sleeve is provided in multiple ways. The bottom of the protective sleeve has a flared sleeve, and the top of each protective sleeve is slidably inserted into the sleeve of the adjacent protective sleeve above it. The sleeve has multiple through mounting slots spaced circumferentially on its side wall. Each mounting slot has a movable plate rotatably mounted inside it. The bottom of the inner side wall of each movable plate has a locking block fixedly mounted. The top of the sleeve side wall has a through groove that mates with the locking block above each mounting slot.

2. The anti-collapse hole support structure for rotary drilling as described in claim 1, characterized in that: The bottom of the inner wall of the card block is provided with a guide ramp.

3. The anti-collapse hole support structure for rotary drilling as described in claim 2, characterized in that: The inner wall of the sleeve is provided with a trapezoidal guide groove below each mounting groove. The top wall of the guide groove is provided with a limiting groove. The mounting groove extends to the inner wall of the limiting groove. The outer wall of the protective sleeve is fixedly provided with a limiting block above each through groove. Each limiting block is slidably inserted into the corresponding limiting groove.

4. The anti-collapse hole support structure for rotary drilling as described in claim 3, characterized in that: The outer wall of the sleeve is fixedly provided with hinge seats on both sides of each mounting groove. The outer wall of the movable plate is fixedly provided with connecting seats. The connecting seats are lower than the top surface of the movable plate. Bolts are threaded through the side wall of each hinge seat. The end of each bolt near the connecting seat is rotatably inserted into the connecting seat.

5. The anti-collapse hole support structure for rotary drilling as described in claim 4, characterized in that: A magnet is fixedly installed at the bottom of the outer side wall of the movable plate, with the bottom surface of the magnet being lower than the bottom surface of the movable plate.

6. The anti-collapse hole support structure for rotary drilling as described in claim 5, characterized in that: The outer wall of the sleeve is fixedly provided with soil-displacing blocks below each mounting groove.

7. The anti-collapse support structure for rotary drilling as described in any one of claims 3-6, characterized in that: The top wall of the channel has a semi-circular notch.

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