Modular pile foundation portal protection device

Abstract

The utility model provides a kind of modularization pile foundation hole protection device, including annular frame, adjustable connecting mechanism and protective screen;Multiple straight pipe frame units are connected head and tail to form annular frame by adjustable connecting mechanism, and annular frame diameter is adjusted by changing the number of straight pipe frame units and adjustable connecting mechanism angle;Adjustable supporting leg is arranged below straight pipe frame unit, for setting annular frame at the outer ring of pile foundation hole;Protective screen is detachably connected with the hooks on multiple straight pipe frame units by multiple locks respectively, to be set in the inside of annular frame and cover the area of pile foundation hole mouth.The problem of inconvenient transportation and inflexible size adjustment of pile foundation hole protection device is solved.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering bridge construction, and in particular to a modular pile foundation borehole protection device. Background Technology

[0002] In construction engineering, bridge construction, and power transmission line foundation construction, cast-in-place piles are widely used due to their high bearing capacity and wide adaptability. During pile foundation construction, numerous pile holes, reaching depths of tens of meters, are formed on site. If these hole openings are not properly protected, they can become significant safety hazards, easily leading to serious accidents such as personnel falling into the holes or tools or debris injuring workers inside. Customized protective covers offer good protection, but they also lack flexibility. A project typically involves pile foundations with various hole diameters, requiring the fabrication of protective covers of different specifications, resulting in high costs, inconvenient storage and transportation, and significant difficulty in moving the heavy protective covers. Utility Model Content

[0003] The main purpose of this utility model is to provide a modular pile foundation borehole protection device to solve the problems of inflexible size adjustment and inconvenient transportation of pile foundation borehole protection devices.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a modular pile foundation borehole protection device, including a ring frame, an adjustable connection mechanism and a protective net; Multiple straight tube frame units are connected end to end through an adjustable connecting mechanism to form a ring frame. The diameter of the ring frame can be adjusted by changing the number of straight tube frame units and the angle of the adjustable connecting mechanism. Adjustable support legs, located below the straight pipe frame unit, are used to place the annular frame on the outer ring of the pile foundation hole; The protective netting is detachably connected to hooks on multiple straight pipe frame units via multiple latches, and is placed inside the ring frame to cover the area of ​​the pile foundation borehole.

[0005] In the preferred embodiment, the adjustable connection mechanism includes a sub-blade plate and a mother blade plate, which are respectively located at both ends of the straight tube frame unit; The ends of the daughter blade plate and the mother blade plate are respectively provided with a first toothed disc and a second toothed disc that mesh with each other, which are used to adjust the relative angle of adjacent straight tube frame units by adjusting the meshing angle of the toothed discs.

[0006] In the preferred embodiment, the mother blade plate includes a lower support plate fixed to the end of the straight tube frame unit and an upper pressure plate that is vertically slidably connected to the end of the straight tube frame unit. The lower support plate rests on the lower surface of the leaf plate, and the upper pressure plate presses against the upper surface of the leaf plate.

[0007] In the preferred embodiment, the ends of the daughter blade plate and the mother blade plate are provided with fixing pins that pass through the central axis of the meshing first toothed disc and the second toothed disc.

[0008] In the preferred embodiment, the upper surface of the mother leaf plate is provided with a circumferential scale centered on the fixing pin.

[0009] In the preferred embodiment, a double-ended bolt is provided between the straight tube frame unit and the fixing pin. The two ends of the double-ended bolt are respectively connected to the lower support plate and the upper pressure plate, which are used to lock the meshing structure of the first gear plate and the second gear plate.

[0010] In the preferred embodiment, the tooth groove cross-sections of the first and second toothed discs are rectangular or trapezoidal.

[0011] In the preferred embodiment, the adjustable outrigger includes an inner cylinder and an outer cylinder that are coaxially sleeved together. The inner cylinder has multiple adjustment holes along the vertical direction. An adjustment bolt passes radially through the outer cylinder and extends into the adjustment hole to adjust the height of the adjustable outrigger. The adjustable outriggers are also equipped with support pads at the lower end.

[0012] In the preferred embodiment, each straight tube frame unit has at least one hook on its inner side.

[0013] In the preferred embodiment, the protective net is a circular net with a mesh structure, the diameter of which is adapted to the diameter of the inscribed circle of the annular frame; The connection points between the latches and the protective net are all located on the circumferential boundary of the protective net, and are evenly distributed circumferentially. This invention provides a modular pile foundation borehole protection device, which significantly improves the flexibility and adaptability of pile foundation borehole protection through modular design. Straight pipe frame units combined with adjustable connecting mechanisms form a ring frame. Users can quickly adapt to pile foundation boreholes of different diameters by increasing or decreasing the number of units or adjusting the angle of the connecting mechanism, solving the problem of fixed-size and non-reusable traditional customized protective covers. The modular units facilitate disassembly, transportation, and storage, greatly reducing logistics costs and on-site management difficulties.

[0014] The adjustable connection mechanism employs a mating structure of mother and child blades and a toothed disc, enabling precise adjustment of the angle between adjacent frame units. The toothed disc engagement, combined with circumferential scale markings, makes angle adjustment more intuitive and controllable. The double-locking design of the fixing pin and double-ended bolts ensures the connection node remains stable under impact from falling objects, preventing frame loosening or overturning due to stress deformation. Straight tube frame units replace the curved structure, breaking through the radius limitations of traditional circular frames, expanding the overall diameter adjustment range, and simplifying the manufacturing process.

[0015] The adjustable outriggers employ a telescopic sleeve structure, flexibly adapting to uneven ground conditions via adjusting bolts and multi-stage positioning holes. Enlarged support pads at the bottom of the outriggers are embedded in the backfill soil layer, effectively dispersing impact loads and enhancing the overall anti-overturning capability of the device. The protective netting is evenly connected to the inner hooks of the frame via locking buckles, ensuring balanced stress distribution on the netting and preventing damage or frame imbalance caused by localized stress concentration. The design of the circular protective netting matching the inner circle of the annular frame further optimizes the netting's coverage efficiency over the orifices.

[0016] This device significantly improves efficiency and economy during construction. On-site assembly requires only standardized units, eliminating the need for welding or custom processing, thus shortening installation time. Modular components of a single specification can cover multiple aperture requirements, reducing material waste and the variety of items stored. The protective netting is detachable and replaceable, facilitating maintenance or adjusting netting specifications according to risk levels. The overall structure ensures safety while reducing the intensity of manual handling and overall construction costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a side view of the overall appearance of this utility model; Figure 2 This is a plan view of the overall appearance of this utility model; Figure 3 This is a structural diagram of any straight tube frame unit of this utility model; Figure 4 This is a structural diagram of the adjustable connection mechanism of this utility model; Figure 5 This is a disassembled structural diagram of the adjustable connecting mechanism of this utility model; Figure 6 This is a partial structural diagram of the connection between the protective net and the straight pipe frame unit of this utility model; Figure 7 This is a disassembly diagram of the adjustable support leg of this utility model.

[0018] In the diagram: Straight pipe frame unit 1; Hook 101; Adjustable support leg 2; Inner cylinder 201; Adjustment hole 2011; Outer sleeve 202; Adjustment bolt 203; Support pad 204; Protective net 3; Lock 4; Sub-blade plate 5; First gear plate 501; Mother blade plate 6; Second gear plate 601; Lower support plate 602; Upper pressure plate 603; Circumferential scale 604; Fixing pin 7; Double-ended bolt 8. Detailed Implementation

[0019] Example 1 like Figure 1-7 As shown, a modular pile foundation borehole protection device includes a ring frame, an adjustable connection mechanism, and a protective net 3. Multiple straight tube frame units 1 are connected end to end by an adjustable connecting mechanism to form a ring frame. The diameter of the ring frame can be adjusted by changing the number of straight tube frame units 1 and the angle of the adjustable connecting mechanism. Adjustable support leg 2 is located below the straight pipe frame unit 1 and is used to place the annular frame on the outer ring of the pile foundation hole. The protective net 3 is detachably connected to the hooks 101 on the multiple straight pipe frame units 1 by multiple latches 4, so as to cover the pile foundation hole area inside the ring frame.

[0020] This application designs a modular frame unit hinge system, which transforms the retaining structure required for the circular holes of pile foundations into an approximate regular polygon structure, thereby enhancing the adjustability range of the device frame structure. If a circular frame structure is used, the diameter adjustment range of the frame structure is small due to the limitation of the radius of the arc of each frame unit, even if it can be adjusted by the connection mechanism between adjacent units. Therefore, this application adopts a straight steel pipe structure, which is convenient for modular processing and can have a larger adjustment range.

[0021] During construction, the corresponding annular frame structure is assembled on-site according to the pile hole size. Straight beams are connected end-to-end to form a closed polygon using a connecting mechanism. A total station is used to accurately mark the center point of the pile location, and cross-shaped protective piles are installed for re-measurement during drilling. An excavator is used to dig a pit at the pile location that is 80-100cm larger than the outer diameter of the casing. A 50cm layer of clay soil is then backfilled at the bottom of the pit. The protective device is then lowered into the pit, ensuring its center coincides with the borehole center. The surrounding area is backfilled with clay soil, compacted in layers, and the lower ends of the adjustable support legs 2 are embedded in the backfill layer. Finally, a protective net 3 of the corresponding size is hung inside the annular frame to form the protective structure.

[0022] In the preferred embodiment, the adjustable connection mechanism includes a sub-blade plate 5 and a mother blade plate 6, which are respectively located at both ends of the straight tube frame unit 1; The ends of the sub-blade plate 5 and the mother blade plate 6 are respectively provided with a first toothed disc 501 and a second toothed disc 601 that mesh with each other, which are used to adjust the relative angle of adjacent straight tube frame units 1 by adjusting the meshing angle of the toothed discs.

[0023] In the preferred embodiment, the mother blade plate 6 includes a lower support plate 602 fixed to the end of the straight tube frame unit 1 and an upper pressure plate 603 vertically slidably connected to the end of the straight tube frame unit 1. The lower support plate 602 supports the lower surface of the leaf plate 5, and the upper pressure plate 603 presses against the upper surface of the leaf plate 5.

[0024] In the preferred embodiment, the ends of the sub-blade plate 5 and the mother blade plate 6 are provided with fixing pins 7 that pass through the central axis of the meshing first toothed disc 501 and the second toothed disc 601.

[0025] In the preferred embodiment, the upper surface of the mother blade plate 6 is provided with a circumferential scale 604 centered on the fixing pin 7.

[0026] In the preferred embodiment, a double-ended bolt 8 is provided between the straight tube frame unit 1 and the fixing pin 7. The two ends of the double-ended bolt 8 are respectively connected to the lower support plate 602 and the upper pressure plate 603, which are used to lock the meshing structure of the first gear plate 501 and the second gear plate 601.

[0027] In the preferred embodiment, the tooth groove cross-sections of the first toothed disc 501 and the second toothed disc 601 are rectangular or trapezoidal.

[0028] This scheme adopts a planar toothed disc structure that meshes with each other. By rotating the angle of the two opposing toothed discs, the relative angle of the adjacent straight tube frame unit 1 can be adjusted. Then, by matching the number of straight tube frame units 1 required for different angles, protective frame structures with different enclosed spaces can be assembled.

[0029] During installation, loosen the double-ended bolt 8. At this time, the fixing pin 7 does not tighten the two gear plates. Move the upper pressure plate 603 vertically to disengage the first gear plate 501 from the second gear plate 601. Then rotate the adjacent straight pipe frame unit 1 and observe the circumferential scale 604 above. Stop at the required adjustment angle and press down the upper pressure plate 603 to re-engage the first gear plate 501 from the second gear plate 601. Tighten the fixing pin 7 and lock the double-ended bolt 8. At this time, the two straight pipe frame units 1 are fixed at the required angle. Then assemble the next straight pipe frame unit 1 in sequence until a closed ring frame structure is formed.

[0030] Since the frame structure serves as the outer contour support unit of the protective net 3, the main force it bears is the downward traction force generated when the falling object enters the protective net 3. Therefore, the adjustable connection mechanism between adjacent straight pipe frame units 1 needs to have strong longitudinal bearing capacity. The fixing pin 7 at the toothed plate meshing point serves to fix the rotation axis on the one hand, and cooperates with the double-headed bolt 8 on the other hand to offset the bending moment between the sub-blade plate 5 and the mother blade plate 6 when impacted.

[0031] In the preferred embodiment, the adjustable outrigger 2 includes an inner cylinder 201 and an outer cylinder 202 that are coaxially sleeved together. The inner cylinder 201 is provided with a plurality of adjustment holes 2011 in the vertical direction. The adjustment bolt 203 passes radially through the outer cylinder 202 and extends into the adjustment hole 2011 to adjust the height of the adjustable outrigger 2. The adjustable support leg 2 is also equipped with a support pad 204 at its lower end.

[0032] The support pad 204 is buried in the backfill soil to fix the protective device; when it is impacted, the load is distributed to the soil through the bottom area of ​​the support pad 204, making the device more stable.

[0033] In the preferred embodiment, each straight tube frame unit 1 has at least one hook 101 on its inner side.

[0034] In the preferred embodiment, the protective net 3 is a circular net with a mesh structure, and its diameter is adapted to the diameter of the inscribed circle of the annular frame; The connection points between the latch 4 and the protective net 3 are all located on the circumferential boundary of the protective net 3, and are evenly distributed circumferentially. To prevent the asymmetrical connection of the protective netting 3 from causing the straight pipe frame unit 1 to overturn or the steel wire rope of the protective netting 3 to break upon impact with falling objects, the traction connection points of the protective netting 3 must be located on the outer circumference of its outline. When the size of the protective netting 3 is large, the number of hooks 101 on the inner side of the straight pipe frame unit 1 is increased accordingly, and the buckles 4 are also connected at equal intervals in the circumference.

[0035] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A modular pile foundation borehole protection device, characterized in that: Includes a ring frame, an adjustable connection mechanism and a protective net (3); Multiple straight tube frame units (1) are connected end to end by an adjustable connecting mechanism to form a ring frame. The diameter of the ring frame is adjusted by changing the number of straight tube frame units (1) and the angle of the adjustable connecting mechanism. Adjustable support leg (2) is located below the straight pipe frame unit (1) and is used to place the ring frame on the outer ring of the pile hole; The protective net (3) is detachably connected to the hooks (101) on the multiple straight pipe frame units (1) by multiple buckles (4) to cover the pile foundation hole area inside the ring frame.

2. The modular pile foundation borehole protection device according to claim 1, characterized in that: The adjustable connection mechanism includes a sub-blade plate (5) and a mother blade plate (6), which are respectively located at both ends of the straight pipe frame unit (1); The ends of the leaf plate (5) and the mother leaf plate (6) are respectively provided with a first toothed disc (501) and a second toothed disc (601) that mesh with each other, which are used to adjust the relative angle of the adjacent straight tube frame unit (1) by adjusting the meshing angle of the toothed discs.

3. The modular pile foundation borehole protection device according to claim 2, characterized in that: the mother... The blade (6) includes a lower support plate (602) fixed to the end of the straight tube frame unit (1) and an upper pressure plate (603) vertically slidably connected to the end of the straight tube frame unit (1). The lower support plate (602) rests on the lower surface of the leaf plate (5), and the upper pressure plate (603) presses against the upper surface of the leaf plate (5).

4. The modular pile foundation borehole protection device according to claim 2, characterized in that: The ends of the sub-blade plate (5) and the mother blade plate (6) are provided with fixing pins (7) that pass through the central axis of the meshing first toothed disc (501) and second toothed disc (601).

5. The modular pile foundation borehole protection device according to claim 4, characterized in that: The upper surface of the mother leaf plate (6) is provided with a circumferential scale (604) centered on the fixing pin (7).

6. The modular pile foundation borehole protection device according to claim 3, characterized in that: A double-ended bolt (8) is provided between the straight tube frame unit (1) and the fixing pin (7). The two ends of the double-ended bolt (8) are connected to the lower support plate (602) and the upper pressure plate (603) respectively, which are used to lock the meshing structure of the first toothed disc (501) and the second toothed disc (601).

7. The modular pile foundation borehole protection device according to claim 2, characterized in that: The tooth groove cross-sections of the first toothed disc (501) and the second toothed disc (601) are rectangular or trapezoidal.

8. The modular pile foundation borehole protection device according to claim 1, characterized in that: The adjustable outrigger (2) includes an inner cylinder (201) and an outer cylinder (202) that are coaxially connected. The inner cylinder (201) is provided with multiple adjustment holes (2011) in the vertical direction. The adjustment bolt (203) passes radially through the outer cylinder (202) and extends into the adjustment hole (2011) to adjust the height of the adjustable outrigger (2). The adjustable outrigger (2) is also provided with a support pad (204) at the lower end.

9. The modular pile foundation borehole protection device according to claim 1, characterized in that: Each straight tube frame unit (1) has at least one hook (101) on its inner side.

10. The modular pile foundation borehole protection device according to claim 1, characterized in that: The protective net (3) is a circular net with a mesh structure, the diameter of which is adapted to the diameter of the inscribed circle of the ring frame; The connection points of the buckle (4) and the protective net (3) are all located on the circumferential boundary of the protective net (3) and are evenly distributed circumferentially.

Images