Construction device for rotary drilling super-long permanent steel casing cast-in-place pile

Abstract

The utility model provides a construction device of an ultra-long permanent steel casing cast-in-place pile for rotary digging and hole forming, which is used for construction of the ultra-long permanent steel casing cast-in-place pile for rotary digging and hole forming and comprises a positioning frame used for positioning a steel casing, and an upper arc-shaped steel plate and a lower arc-shaped steel plate are arranged on a positioning cylinder in the positioning frame. A horizontal jack is placed at the position where the upper arc-shaped steel plate is located, and an arc-shaped steel plate jacking block is arranged on the horizontal jack; the impact gravity hammer movable track is installed at the bottom of the steel casing, the impact gravity hammer is connected with the impact gravity hammer movable track through the impact gravity hammer movable track connecting device, the telescopic chassis is arranged at the bottom of the impact gravity hammer movable track, and the construction efficiency and quality can be improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering construction, and in particular to a construction device for rotary drilling of ultra-long permanent steel casing cast-in-place piles. Background Technology

[0002] Steel casings are temporary structures used in pile foundation construction to effectively protect the piles and prevent dangerous situations such as borehole collapse during construction. They play a vital supporting role in improving seismic resistance and maintaining the overall safety and stability of bridge pile foundations. In most bridge pile foundation construction processes, steel casings are not typically used as load-bearing components and are removed after the pile foundation is completed.

[0003] With the continuous development of bridge construction in my country, the difficulty of bridge construction is increasing. Permanent steel casings are currently a highly advanced construction technique used in bridge pile foundation construction. Earthquake-prone areas are significantly affected by seismic forces, and current reinforced pile foundations are insufficient to withstand strong earthquakes. To ensure the overall stability of bridge pile foundations, steel casings are often used to protect bridges from seismic forces and other damage. Permanent steel casings have advantages such as simple fabrication, rapid installation, and convenient transportation and processing. In river construction, where the excavation work for the foundation pit is substantial, the use of permanent steel casings only requires excavation of the pile foundation area and the construction work area, effectively reducing foundation pit excavation and lowering construction difficulty.

[0004] When using traditional bored pile construction technology, it is usually necessary to first install a permanent steel casing before proceeding with pile foundation construction. For pile foundation projects with large burial depths, the installation of the permanent steel casing is difficult and costly, severely impacting the on-site construction progress. During the lowering of the permanent steel casing, misalignment and pile slippage are common, resulting in poor construction accuracy, low efficiency, and slow progress.

[0005] In view of this, in order to address the shortcomings of previous permanent steel casing construction, there is an urgent need for a new construction device for rotary drilling of ultra-long permanent steel casing cast-in-place piles, which can improve construction efficiency, enhance construction quality, and ensure safe and reliable construction quality. Utility Model Content

[0006] The purpose of this utility model is to provide a construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles, which can improve construction efficiency and construction quality.

[0007] To achieve the above objectives, this technical solution provides a construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles, used for installing the steel casing, comprising:

[0008] A positioning frame for positioning steel casing, wherein an upper arc-shaped steel plate and a lower arc-shaped steel plate are provided on the positioning casing inside the positioning frame, and a horizontal jack is placed at the position of the upper arc-shaped steel plate, and an arc-shaped steel plate top block is arranged on the horizontal jack;

[0009] The impact gravity hammer is installed on the movable track at the bottom of the steel casing. The impact gravity hammer is connected to the movable track via an impact gravity hammer connecting device. A retractable chassis is arranged at the bottom of the movable track.

[0010] Compared with existing technologies, this technical solution has the following characteristics and beneficial effects:

[0011] 1. The use of a positioning frame that connects the permanent steel casing to the reinforcing cage eliminates the need for the initial steel casing installation process, allowing the steel casing and reinforcing cage to be lowered as a whole. This solves the problem of difficult construction of deep-buried steel casings, reduces construction costs, and improves construction efficiency.

[0012] 2. By arranging multiple layers of arc-shaped steel plates on the positioning frame of the steel casing, the lowering position of the steel casing is restricted by the arc-shaped steel plates, and the center position is adjusted in real time by a horizontal jack to achieve precise positioning;

[0013] 3. The combination of floating roof and inclinometer to control the verticality of steel casing allows for real-time detection and control of the ground position and verticality of the steel casing, ensuring that vibration sinking is carried out after the steel casing is in a stable state.

[0014] 4. By impacting the retractable chassis with an impact gravity hammer, the deformation at the bottom of the steel casing can be expanded and restored, effectively solving the problem of drill bit jamming and improving drilling efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning frame connecting the permanent steel casing and the reinforcing cage.

[0016] Figure 2 This is a longitudinal cross-sectional view of the verticality control device for the combined steel casing of the floating roof and inclinometer.

[0017] Figure 3 This is a longitudinal cross-sectional view of a steel casing with multiple curved plates placed on it.

[0018] Figure 4 This is a plan view of the steel casing with multiple layers of arc-shaped pallets.

[0019] Figure 5 This is a schematic diagram of a permanent steel casing for the installation of a pile chute.

[0020] Figure 6 This is a schematic diagram of a device for restoring the deformation and expansion of the bottom of a steel casing.

[0021] Figure 7This is a schematic diagram of a socket-type steel casing, which is part of the rotary drilling full casing follow-up technology.

[0022] In the diagram: 1-I32a I-beam; 2-Construction platform; 3-I28a I-beam; 4-Steel pipe pile; 5-I-beam locking buckle; 6-Inclinometer; 7-Floating plate; 8-Level; 9-Nylon rope; 10-Cross fork; 11-Arc-shaped steel plate top block; 12-Horizontal jack; 13-Lower arc-shaped steel plate; 14-Steel casing; 15-Upper arc-shaped steel plate; 16-Welded bracket; 17-Reusable buffer bracket; 18-Arc-shaped steel plate; 19-Anti-collision buffer pad; 20-Positioning frame; 21-Lifting lug; 22-Rubber pad layer; 23-Structural adhesive; 24-Limiting steel bar; 25-I25a I-beam; 26-Impact gravity hammer movable track; 27-Impact gravity hammer movable track connecting device; 28-Impact gravity hammer; 29-Track connecting device; 30-Retractable chassis; 31-Enlarged hole head of casing; 32-Bottom of casing. Detailed Implementation

[0023] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0026] This solution provides a construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles, used for installing steel casings, including:

[0027] The positioning frame 20 is used to position the steel casing 14. The positioning casing inside the positioning frame 20 is provided with an upper arc-shaped steel plate 15 and a lower arc-shaped steel plate 13. A horizontal jack 12 is placed at the position of the upper arc-shaped steel plate 15, and an arc-shaped steel plate top block 11 is arranged on the horizontal jack 12.

[0028] An impact gravity hammer movable track 27 is installed at the bottom of the steel casing 14, wherein the impact gravity hammer 28 is connected to the impact gravity hammer movable track 26 through the impact gravity hammer movable track connecting device 27, and a retractable chassis 30 is arranged at the bottom of the impact gravity hammer movable track 27.

[0029] like Figure 1 As shown, in some embodiments, the upper structure of the positioning frame 20 is a trapezoidal structure constructed with I-beams, and the lower structure is a support structure consisting of four steel pipe piles 4 distributed in four directions. Specifically, the horizontal and vertical supports of the upper structure are made of I32a I-beams 1, the outer diagonal braces are made of I28a I-beams 3, and the connections between different I-beams are fixed by welding. A construction platform 2 is welded to the top surface of the upper structure.

[0030] More specifically, the bottom and top surfaces of the upper structure of the frame are both square spaces formed by four I32a I-beams 1 arranged in a square pattern. I28a I-beams 3 are used as external diagonal braces between the four directions of the top surface of the upper structure and the four directions of the bottom surface of the upper structure. At the same time, vertically arranged I32a I-beams 1 are welded vertically between the four directions of the top surface of the upper structure and the bottom surface of the upper structure. The four steel pipe piles 4 of the lower structure of the frame are welded to the four corners of the bottom surface of the upper structure.

[0031] In some embodiments, a construction platform 2 made of I14a I-beams is welded to the top surface of the upper structure of the frame, wherein the construction platform 2 serves as a steel casing positioning construction platform and extends outward relative to the upper structure of the frame.

[0032] like Figure 3 As shown, a positioning cylinder for placing the steel casing 14 is formed inside the positioning frame. An upper arc-shaped steel plate 15 and a lower arc-shaped steel plate 13 are spaced apart along the height direction inside the positioning cylinder. Steel brackets 16 are welded to the ends of the upper arc-shaped steel plate 15 and the lower arc-shaped steel plate 13 opposite to the steel casing 14, and the steel brackets 16 are fixed to the positioning frame. In other words, the steel brackets 16 are welded to the bottom of the upper arc-shaped steel plate 15 and the lower arc-shaped steel plate 13 for fixation.

[0033] like Figure 4 As shown, the upper arc-shaped steel plate 15 and the lower arc-shaped steel plate 13 are complete circular arc-shaped steel plates 18.

[0034] In addition, a horizontal jack 12 is installed at the position of the upper arc-shaped steel plate 15, wherein the horizontal jack 12 is welded to the positioning cylinder and is located above the steel bracket 16 of the upper arc-shaped steel plate 15. An arc-shaped steel plate top block 11 is welded to the horizontal jack 12, wherein the arc-shaped steel plate top block 11 extends toward the position of the steel casing 14.

[0035] When the bottom of the steel casing 14 is deformed, the retractable chassis 30 is impacted by the impact gravity hammer 28 to enlarge and restore the hole of the steel casing 14, thus solving the problem of deformation at the bottom of the steel casing.

[0036] like Figure 7 As shown, the bottom of the steel casing is equipped with an impact gravity hammer movable track 26, and the bottom 32 of the steel casing rests on the impact gravity hammer movable track 26. The casing enlargement head 31 is located inside the bottom 32 of the casing. The impact gravity hammer 28 is movably connected to the impact gravity hammer movable track 26 through the impact gravity hammer movable track connecting device 27.

[0037] Specifically, the movable track 26 of the impact gravity hammer forms a track space, and the impact gravity hammer 28 is placed within the track space. Both ends of the impact gravity hammer 28 are movably mounted on the movable track 26 via the movable track connecting device 27. A retractable chassis 30 is arranged within the track space, and is positioned between the impact gravity hammer 28 and the enlarged hole head 31 of the casing. This allows the enlarged hole head of the steel casing 14 to be restored by impacting the retractable chassis 30 with the impact gravity hammer 28 when the bottom of the steel casing 14 deforms.

[0038] In some embodiments, the track connecting device 29 is connected to the bottom 32 of the casing, and the movable track 26 of the impact gravity hammer is arranged inside the track connecting device 29 to form a track space.

[0039] Additionally, in some embodiments, such as Figure 2 As shown, two interlaced nylon ropes are arranged at the bottom of the steel casing 14 to form a cross 10. A thin nylon rope 9 is tied at the intersection of the cross 10. A floating plate 7 is connected to the thin nylon rope 9, and a level 8 is arranged on the floating plate 7.

[0040] The top outer side of the steel casing 14 is fixed with an inclinometer 6 by welding an I-beam lock 5. The verticality of the steel casing is determined by the level 8 and the inclinometer 6. The steel casing is then adjusted to the accurate position by the horizontal jack 12.

[0041] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles, used for installing steel casings, characterized in that, include: A positioning frame (20) for positioning the steel casing (14) is provided with an upper arc-shaped steel plate (15) and a lower arc-shaped steel plate (13) on the positioning casing inside the positioning frame (20). A horizontal jack (12) is placed at the position of the upper arc-shaped steel plate (15), and an arc-shaped steel plate top block (11) is arranged on the horizontal jack (12). An impact gravity hammer movable track (26) is installed at the bottom of the steel casing (14), wherein the impact gravity hammer (28) is connected to the impact gravity hammer movable track (26) through the impact gravity hammer movable track connecting device (27), and a retractable chassis (30) is arranged at the bottom of the impact gravity hammer movable track (26).

2. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The upper structure of the positioning frame (20) is a trapezoidal structure built with I-beams, and the lower structure is a support structure with four steel pipe piles (4) distributed in four directions.

3. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 2, characterized in that, The horizontal and vertical supports of the upper structure of the frame are made of I32a I-beams (1), and the outer diagonal braces are made of I28a I-beams (3). The connection between different I-beams is fixed by welding.

4. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The top surface of the upper structure of the frame is welded with a construction platform (2) made of I14a I-beams, wherein the construction platform (2) serves as a positioning platform for the steel casing and extends outward relative to the upper structure of the frame.

5. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The upper arc-shaped steel plate (15) and the lower arc-shaped steel plate (13) are spaced apart in the positioning cylinder along the height direction. The upper arc-shaped steel plate (15) and the lower arc-shaped steel plate (13) are welded with steel brackets (16) at the ends away from the steel casing (14). The steel brackets (16) are fixed on the positioning frame.

6. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, A horizontal jack (12) is welded to the positioning cylinder and located above the steel bracket (16) of the upper arc-shaped steel plate (15). An arc-shaped steel plate top block (11) is welded to the horizontal jack (12), wherein the arc-shaped steel plate top block (11) extends toward the location of the steel casing (14).

7. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The impact gravity hammer movable track (26) forms a track space, the impact gravity hammer (28) is placed in the track space, and the two ends of the impact gravity hammer (28) are movably mounted on the impact gravity hammer movable track (26) through the impact gravity hammer movable track connecting device (27).

8. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The bottom (32) of the steel casing is placed on the moving track (26) of the impact gravity hammer, the casing expansion head (31) is located inside the bottom (32) of the casing, and the telescopic chassis (30) is set in the space between the impact gravity hammer (28) and the casing expansion head (31).

9. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, Two interlaced nylon ropes are arranged at the bottom of the steel casing (14) to form a cross (10). A thin nylon rope (9) is tied at the intersection of the cross (10). A floating plate (7) is connected to the thin nylon rope (9). A level (8) is arranged on the floating plate (7).

10. The construction device for rotary-drilled ultra-long permanent steel casing cast-in-place piles according to claim 1, characterized in that, The inclinometer (6) is fixed to the top outer side of the steel casing (14) by welding with an I-beam lock (5).

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