Impact pile foundation protection device

Abstract

The application relates to the technical field of pile foundation hole protection, and particularly discloses an impact hole-forming pile foundation protection device, which comprises a mesh and a bidirectional conical connecting body. The mesh comprises an upper mesh and a lower mesh, both of which are arranged in parallel and are formed into a grid by longitudinal steel bars and transverse steel bars. The bidirectional conical connecting body is fixed on a middle circular ring by welding through oblique stiffening ribs of a top circular ring and a bottom circular ring, and is formed into an upper-lower symmetrical conical flared shape. The patent aims to solve the problem of steel wire rope swing during construction of an existing impact hole-forming pile machine. The device is mainly used for safety protection and positioning and guiding during construction of the impact hole-forming pile machine.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation borehole protection technology, and in particular to a protective device for impact-drilled pile foundations. Background Technology

[0002] Pile foundation borehole protection devices are critical safety facilities in the construction of pile foundations for bridges, buildings, and other structures. They are primarily used to cover the borehole opening to prevent personnel, equipment, or debris from accidentally falling into the hole. In impact drilling, the drill bit is frequently raised and lowered via a wire rope, resulting in a high risk of borehole exposure. Therefore, the protection device must be able to withstand unexpected loads and be easy to install; it is a core measure to ensure the safety of pile foundation construction.

[0003] With the improvement of construction safety standards, protective devices are gradually developing towards modularity, detachability, and reusability. For example, CN212835357U discloses a protective device for pile foundation casings, which uses positioning steel bars welded to the outer wall of the casing, an outer ring-shaped protective net cover, and an arched protective net sheet installed on top to form double-layer protection. Its advantage lies in its detachability and reusability. CN219548576U discloses a construction protective device for pile foundation boreholes, which uses a quadrilateral frame with a pointed base inserted into the ground, with protective uprights and crossbars around the perimeter, and a liftable fall arrestor on top, integrating auxiliary functions such as warning lights and protective doors. CN221856279U discloses an opening and closing protective device for pile foundation boreholes, which uses a hinge device to hinge the cover plate to the steel casing, and opens and closes the borehole by flipping the cover plate. The cover plate is provided with a pouring port so that construction personnel can carry out pouring operations without opening the borehole cover plate. However, existing technologies mostly focus on static protection and do not fully consider the safety hazards caused by the large swing of the wire rope during dynamic construction of impact drilling rigs. For example, the wire rope is prone to deviating from the design trajectory, colliding with the borehole or getting tangled in the surrounding equipment, leading to accidents such as head deflection, borehole wall collapse or even wire rope breakage.

[0004] Therefore, a new type of protective device is urgently needed to address the swinging condition of the wire rope in impact pile drilling machines. This device is equipped with a guiding mechanism to actively constrain the swing range of the wire rope, preventing it from colliding with the borehole opening or deviating from the working axis; it retains the traditional borehole opening anti-fall function and does not affect the raising and lowering of the drill bit. Utility Model Content

[0005] To address the shortcomings of existing technologies, the technical problem solved by this utility model is to provide a protective device for impact-drilled pile foundations, thereby solving the problem of wire rope swaying during the construction of existing impact-drilled pile machines.

[0006] To solve the above problems, the technical solution adopted by this utility model is: an impact-drilled pile foundation protection device, including a mesh and a bidirectional conical connector;

[0007] The mesh includes an upper mesh and a lower mesh, which are arranged in parallel and are formed by overlapping longitudinal and transverse steel bars to form a grid. The grid intersections are fixedly connected by resistance spot welding. The upper and lower center rings of the upper and lower mesh are respectively fully welded to their geometric centers.

[0008] The bidirectional conical connector is formed by welding the top and bottom rings to the middle ring with oblique stiffening ribs, creating a symmetrical conical flared shape. The top and bottom rings are fixedly connected to the upper and lower center rings by circumferential fillet welds.

[0009] The upper and lower mesh panels are fixedly connected by vertical supports.

[0010] Furthermore, the diameter of the central ring is 200 mm.

[0011] Furthermore, the spacing between the upper mesh panels is smaller than the spacing between the lower mesh panels.

[0012] Furthermore, the height of the bidirectional conical connector is equal to the vertical net distance between the upper central ring and the lower central ring.

[0013] Furthermore, the vertical support includes peripheral vertical ribs and internal vertical ribs. The peripheral vertical ribs are continuously distributed along the periphery of the upper and lower mesh panels, and their upper and lower ends are fully welded to the mesh panel nodes, respectively. The internal vertical ribs are evenly distributed in a matrix in the non-peripheral area, and their two ends are spot welded to the mesh panel nodes for fixation.

[0014] Compared with existing technologies, the beneficial effects of this solution are: 1. The conical connector effectively constrains the swing of the wire rope and limits its horizontal displacement through the guide channel formed by its top, bottom and middle rings; 2. The wire rope is restricted to move in a nearly vertical state, driving the impact hammer to fall precisely along the design axis with a concentrated landing point, ensuring the verticality of the pile hole. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the protective device structure of this application.

[0016] Figure 2 This is a schematic diagram of the network chip structure in this application.

[0017] Figure 3 This is a schematic diagram of the lower wire mesh and vertical support structure of this application.

[0018] Figure 4 This is a schematic diagram of the bidirectional conical connector structure of this application.

[0019] The reference numerals in the accompanying drawings include: mesh 1; upper mesh 11; lower mesh 12; central ring 10; upper central ring 101; lower central ring 102; bidirectional conical connector 2; top ring 21; middle ring 22; bottom ring 23; stiffening rib 24; vertical support 3; peripheral vertical rib 31; internal vertical rib 32. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] As attached Figure 1-4 As shown: A protective device for impact-drilled pile foundations includes a mesh 1 and a bidirectional conical connector 2.

[0022] The mesh 1 includes an upper mesh 11 and a lower mesh 12, which are arranged in parallel and are formed by overlapping longitudinal and transverse steel bars to form a grid. The grid intersections are fixedly connected by resistance spot welding. The spacing of the upper mesh 11 is smaller than that of the lower mesh 12. The upper central ring 101 and the lower central ring 102 are fully welded to the geometric centers of the upper mesh 11 and the lower mesh 12, respectively. The central ring 10 includes an upper central ring 101 and a lower central ring 102, and the diameter of the central ring 10 is 200mm.

[0023] The bidirectional conical connector 2 is fixed to the middle ring 22 by welding the top ring 21 and the bottom ring 23 to the middle ring 22 through the oblique stiffening ribs 24, forming a symmetrical conical flared shape; the top ring 21 and the bottom ring 23 are fixedly connected to the upper center ring 101 and the lower center ring 102 by annular fillet welds; the height of the bidirectional conical connector 2 is equal to the vertical net distance between the upper mesh 11 and the lower mesh 12.

[0024] The upper mesh 11 and the lower mesh 12 are fixedly connected by a vertical support 3. The vertical support 3 includes peripheral vertical ribs 31 and internal vertical ribs 32. The peripheral vertical ribs 31 are continuously distributed around the periphery of the upper mesh 11 and the lower mesh 12, and their upper and lower ends are fully welded to the nodes of the mesh 1, respectively. The internal vertical ribs 32 are evenly distributed in a matrix in the non-peripheral area, and their two ends are spot welded to the nodes of the mesh 1 for fixation.

[0025] Implementation method:

[0026] Follow these steps during construction:

[0027] Step 1: Pass the steel wire rope of the perforated pile driver through the bidirectional conical connector 2;

[0028] Step 2: Connect the lower end of the wire rope to the pile driver hammer.

[0029] Step 3: Place the protective device with the steel wire rope directly onto the casing above the borehole, so that the center of the central ring 10 is at the same center point as the center of the pile hole. At this time, the protective device plays the role of protection and positioning guidance.

[0030] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications 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 shall 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 protective device for impact-drilled pile foundations, characterized in that: Includes mesh panels and bidirectional tapered connectors; The mesh includes an upper mesh and a lower mesh, which are arranged in parallel and are formed by overlapping longitudinal and transverse steel bars to form a grid. The grid intersections are fixedly connected by resistance spot welding. The upper and lower center rings of the upper and lower mesh are respectively fully welded to their geometric centers. The bidirectional conical connector is formed by welding the top and bottom rings to the middle ring with oblique stiffening ribs, creating a symmetrical conical flared shape. The top and bottom rings are fixedly connected to the upper and lower center rings by circumferential fillet welds. The upper and lower mesh panels are fixedly connected by vertical supports.

2. The impact-drilled pile foundation protection device according to claim 1, characterized in that: The diameter of the central ring is 200 mm.

3. The impact-drilled pile foundation protection device according to claim 1, characterized in that: The spacing between the upper and lower mesh panels is smaller than the spacing between the lower mesh panels.

4. The impact-drilled pile foundation protection device according to claim 1, characterized in that: The height of the bidirectional conical connector is equal to the vertical net distance between the upper and lower central rings.

5. The impact-drilled pile foundation protection device according to claim 1, characterized in that: The vertical support includes peripheral vertical ribs and internal vertical ribs. The peripheral vertical ribs are continuously distributed along the periphery of the upper and lower mesh panels, and their upper and lower ends are fully welded to the mesh panel nodes, respectively. The internal vertical ribs are evenly distributed in a matrix in the non-peripheral area, and their two ends are spot welded to the mesh panel nodes for fixation.

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