Pile foundation casing support suitable for cast-in-situ pile

Abstract

The utility model discloses a pile foundation casing support suitable for bored pile, including support frame unit, connecting strip and mesh sheet, and support frame unit forms support frame in proper order, and connecting strip is arranged along the radial of pile foundation casing and is fixedly connected in the top of pile foundation casing, and support frame is inserted and fixed on the upper surface of connecting strip, and after being in position, mesh sheet is installed in the top of support frame and forms support platform, the utility model discloses the structure of setting up collapsible support frame on the top of pile foundation casing, not only can integrate the advantages such as the quick deployment of pile foundation casing support, stable connection and multifunctional adaptation in an organic whole, guarantees the construction quality and personnel safety of orifice operation, avoids the measurement error and the safety accident caused by the deformation or sliding of support, can also reduce transportation cost and construction difficulty, improves construction efficiency, satisfies the comprehensive demand of modern building engineering to bored pile construction precision, safety and economy.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for building construction, and in particular to a pile foundation casing support suitable for bored cast-in-place piles. Background Technology

[0002] In bored pile construction, the borehole platform for the pile casing is a core auxiliary facility for ensuring construction safety and operational efficiency, directly affecting measurement accuracy, duct installation quality, and worker safety. Traditional borehole support methods often use welded steel mesh as a temporary support platform. However, due to limitations in structural design and construction technology, this method has several drawbacks. For example, its rigidity is insufficient, making it susceptible to deformation under construction loads, directly interfering with the accuracy of drilling inspections and soil sampling. The mesh and steel casing are simply connected by an overlap, lacking a reliable fixing structure, which can easily lead to sliding displacement and the safety hazard of workers falling into the borehole. On-site welding quality is greatly affected by the construction environment and operator skill, and long-term use can lead to weld failure or breakage. Furthermore, the welded structure cannot be disassembled and is difficult to reuse. At the same time, traditional platforms have limited functionality, only providing basic support, and cannot meet diverse construction needs such as positioning measuring instruments and fixing concrete ducts. Therefore, the development of pile casing support construction technology has been driven.

[0003] While existing pile foundation casing support construction technology can provide basic support, it also has several shortcomings. For example, the support structure is mostly an integrated, fixed form, which cannot be folded and stored, resulting in low efficiency in transportation and on-site deployment. Functional modules lack standardized interfaces, making it difficult to quickly adapt to different construction scenarios and still requiring temporary processing and modification. Furthermore, the connection method between the support and the steel casing lacks unified standards, resulting in insufficient connection stability and the absence of an effective tilt monitoring and early warning mechanism, making it impossible to control safety risks during construction in a timely manner. In addition, existing construction techniques lack standardized process guidance; support installation and module switching rely heavily on the experience of workers, leading to poor consistency in construction quality. Improper installation of some supports further reduces structural stability and can even cause safety accidents.

[0004] Therefore, it is necessary to improve the structure of the existing pile foundation casing support. This improvement will not only integrate the advantages of rapid deployment, stable connection, and multi-functional adaptability of the pile foundation casing support, ensuring the construction quality and personnel safety of the borehole opening operation, avoiding measurement errors and safety accidents caused by support deformation or slippage, but also reduce transportation costs and construction difficulty, improve construction efficiency, and meet the comprehensive needs of modern construction projects for the accuracy, safety, and economy of bored pile construction. Utility Model Content

[0005] In view of the shortcomings of current pile foundation casing support structures, the purpose of this utility model is to provide a pile foundation casing support suitable for bored cast-in-place piles. It can not only integrate the advantages of rapid deployment, stable connection and multi-functional adaptability of pile foundation casing supports, but also ensure the construction quality and personnel safety of borehole operations, avoid measurement errors and safety accidents caused by support deformation or slippage, reduce transportation costs and construction difficulty, improve construction efficiency, and meet the comprehensive needs of modern construction projects for the accuracy, safety and economy of bored cast-in-place pile construction.

[0006] This utility model discloses a pile foundation casing support suitable for bored cast-in-place piles, comprising a support frame unit, connecting strips, and a mesh plate. The support frame unit is arranged in sequence to form a support frame. The connecting strips are arranged radially along the pile foundation casing and fixedly connected to the top of the pile foundation casing. The support frame is inserted and fixed to the upper surface of the connecting strips. After being in place, the mesh plate is installed on the top of the support frame to form a support platform.

[0007] Furthermore, the sidewalls of adjacent support frame units are hinged together by hinges.

[0008] Furthermore, the lower surface of the connecting strip is a serrated structure, which is embedded in the upper edge of the pile foundation casing wall to fix the connecting strip.

[0009] Furthermore, the upper surface of the connecting strip is provided with a limiting groove, which is symmetrically distributed at both ends of the connecting strip. The upper rod of the support frame is embedded in the limiting groove to fix the support frame.

[0010] Furthermore, the number of connecting strips is at least two sets, with adjacent connecting strips arranged side by side along the radial direction of the pile foundation casing; one set of connecting strips is perpendicular to the other set of connecting strips.

[0011] Furthermore, the lower edge surface of the mesh plate overlaps the upper surface of the upper rod of the support frame and is fixed to form the support platform.

[0012] Furthermore, the edge of the mesh plate conforms to the top contour of the support frame.

[0013] Furthermore, the support platform has a strip-shaped operating groove in the middle for installing functional modules, and the mesh plate has a connecting plate for placing functional modules on the side wall near the edge of the strip-shaped operating groove. Several connecting plates can be arranged side by side along the length direction.

[0014] Furthermore, it also includes a tilt sensor and an alarm device, which are located on the outer edge of the support frame and are evenly distributed circumferentially.

[0015] Furthermore, the support frame unit, connecting strip, and mesh plate are all prefabricated steel components.

[0016] The beneficial effects of this utility model are as follows: The pile foundation casing support of this utility model, which is applicable to bored cast-in-place piles, adopts a structure in which a foldable support frame is set on the top of the pile foundation casing. This structure not only integrates the advantages of rapid deployment, stable connection and multi-functional adaptability of the pile foundation casing support, but also ensures the construction quality and personnel safety of the borehole opening operation, avoids measurement errors and safety accidents caused by deformation or slippage of the support, reduces transportation costs and construction difficulty, improves construction efficiency, and meets the comprehensive requirements of modern construction engineering for the accuracy, safety and economy of bored cast-in-place pile construction. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the pile foundation casing support applicable to bored cast-in-place piles according to this utility model;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a structural diagram of the connecting strip;

[0021] Figure 4 This is a schematic diagram of the structure after the support frame is unfolded;

[0022] Figure 5 This is a schematic diagram showing the connection between adjacent support frame units and hinges;

[0023] Figure 6 This is a schematic diagram of the structure after the support frame has been folded.

[0024] Reference numerals: 1. Support frame; 101. Support frame unit; 1011. Upper rod; 102. Hinge; 1021. Hinge shaft; 1022. Leaf plate; 2. Connecting strip; 201. Serrated structure on the lower surface of the connecting strip; 202. Limiting groove; 3. Pile foundation casing; 4. Mesh plate; 401. Connecting plate; 5. Functional module; 501. Funnel-shaped bayonet mounting hole; 6. Strip-shaped operating groove; 7. Tilt sensor. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0026] This utility model discloses a pile foundation casing support suitable for bored cast-in-place piles, including a support frame unit 101, connecting strips 2, and a mesh plate 4. The support frame units 101 are arranged sequentially to form a support frame 1. The connecting strips 2 are arranged radially along the pile foundation casing 3 and fixedly connected to the top of the pile foundation casing 3. The support frame 1 is inserted and fixed to the upper surface of the connecting strips 2. After being in place, the mesh plate 4 is installed on the top of the support frame 1 to form a support platform. The support frame 1 is modularly composed of support frame units 101, which can be flexibly adjusted according to the size of the pile foundation casing 3 to adapt to the construction needs of pile foundations of different specifications. Modular manufacturing and assembly eliminates the need for complex on-site processing, shortens the construction cycle, and reduces labor costs. Moreover, the support frame unit 101 is small in size, making it easy to transport and reducing transportation costs. The connecting strips 2 are arranged radially along the pile foundation casing 3, which can distribute the load of the support frame 1. To avoid localized stress concentration, the plug-in fixing method replaces the traditional lap joint, reducing relative displacement and the risk of slippage of the support frame 1, providing a stable foundation for orifice operations. The radial arrangement design makes the installation and positioning of the connecting strips 2 more convenient. After hoisting, they can be directly plugged in and fixed without complex welding or bolt tightening, shortening the installation time of the support frame 1, reducing construction difficulty, and reducing installation errors. Further details are omitted here. The mesh plate 4, after being laid, forms a complete support platform, sealing the gaps around the orifice and eliminating the risk of personnel falling into the orifice. The mesh plate 4 is a densely perforated mesh plate, and the dense perforation structure also has anti-slip properties, avoiding safety accidents caused by slipping during construction and providing comprehensive protection for high-altitude operations. After the mesh plate 4 is fixed with the support frame 1, it forms an integrated force-bearing system, compensating for the insufficient rigidity of a single frame, reducing deformation caused by construction loads, and ensuring the stability of high-precision operations such as measurement or conduit installation.

[0027] In this embodiment, the sidewalls of adjacent support frame units 101 are hinged together by hinges 102. The hinge structure formed by the hinges 102 allows the support frame units 101 to be folded and retracted along the hinge axis, significantly reducing the overall volume and facilitating stacking during transportation and handling. This reduces logistics space occupation and transportation costs. The hinge structure makes the unfolding process of the support frame 1 simple and convenient, eliminating the need for on-site assembly of scattered components. It can be quickly positioned after unfolding, shortening the preparation time for the construction of the support frame 1. The flexibility of the hinge 102 connection reduces the difficulty of manual operation, allowing unfolding and retraction to be completed without professional tools, thus improving construction convenience. The hinge 102 forms a rigid connection node, and the included angle between the support frame units 101 is fixed after unfolding, preventing relative displacement under stress and ensuring the overall load-bearing capacity of the support frame.

[0028] In this embodiment, the support frame 1 is a regular octagon, which is more conducive to achieving stable folding. The width of the support frame 1 is greater than the diameter of the borehole, that is, greater than the diameter of the pile foundation casing 3. The hinge 102 typically includes a hinge shaft 1021 and two leaf pieces 1022. The leaf pieces 1022 are welded to the side walls of adjacent support frame units 101 respectively. The hinge shaft 1021 passes through the shaft hole between the two leaf pieces 1022, which is a conventional setting in the prior art and will not be described in detail here.

[0029] In this embodiment, the lower surface of the connecting strip 2 is a sawtooth structure 201. The sawtooth structure 201 is embedded in the upper edge of the wall of the pile foundation casing 3 to fix the connecting strip 2. The sawtooth structure 201 is embedded in the upper edge of the wall of the pile foundation casing 3 through an interlocking method, forming a mechanical locking effect. Compared with planar overlap or simple bonding, the contact area is larger and the anti-slip ability is stronger. It can effectively resist the lateral tensile force brought by the load of the support frame 1, avoid the connecting strip 2 from loosening or displacement, and provide a stable force-bearing foundation for the support frame 1. The interlocking design of the sawtooth structure 201 has a self-positioning function. During the embedding process, the radial position of the connecting strip 2 can be quickly calibrated without additional measuring and positioning tools, shortening the installation time. Moreover, the installation operation is simple, without welding or complex bolt tightening, reducing the difficulty of manual operation and improving construction efficiency. The rigid connection formed by the sawtooth interlocking reduces the stress concentration at the connection part and avoids problems such as loosening or falling off after long-term use. The pile foundation casing 3 is generally made of steel casing, which will not be described in detail here.

[0030] In this embodiment, the upper surface of the connecting strip 2 is provided with a limiting groove 202. The limiting groove 202 is symmetrically distributed at both ends of the connecting strip 2. The upper rod 1011 of the support frame 1 is embedded in the limiting groove 202 to fix the support frame 1. The limiting groove 202 provides precise positioning for the upper rod 1011 of the support frame 1. After being embedded, it forms a double constraint in both the circumferential and radial directions, preventing the support frame 1 from shifting or sliding during operation, and ensuring the accurate installation position of the strip-shaped operating groove 6 and the functional module 5. The groove opening of the limiting groove 202 and the upper rod 1011 The close fit of the upper rod 1011 increases the contact area, which can distribute the force, reduce local stress concentration, and improve the overall structural load-bearing stability. The symmetrically distributed limiting grooves 202 have a guiding function, which can quickly align and embed the support frame 1 during hoisting without repeated adjustment and calibration, thus shortening the installation time. The embedded fixing avoids the risk of bolt loosening and welding failure in traditional connection methods, and has stronger long-term stability. At the same time, the rigid fit between the limiting groove 202 and the upper rod 1011 reduces the wear of the connection parts, extends the number of times the support frame 1 can be reused, and reduces construction costs.

[0031] In this embodiment, the number of connecting strips 2 is at least two sets, with adjacent connecting strips 2 arranged side by side along the radial direction of the pile casing 3; one set of connecting strips 2 is perpendicular to the other set of connecting strips 2, and at least two sets of connecting strips 2 can form multi-point support. With the mutually perpendicular distribution, a cross-shaped or multi-directional radial force-bearing structure is constructed to evenly transfer the load of the support frame 1 to the pile casing 3, avoiding structural deformation or loosening caused by local stress concentration; the vertical distribution design forms a two-way constraint, effectively resisting the impact of external forces in the horizontal direction and reducing the risk of offset and torsion of the support frame 1; the number of connecting strips 2 can be flexibly adjusted according to the diameter of the pile casing 3 and the size of the support frame 1, such as two sets or four sets, etc. The standardized vertical distribution layout is compatible with pile casings 3 of different apertures. Without changing the structure of the pile casing 3, the number of connecting strips 2 can be increased or decreased to adapt to the heavy load requirements of large-diameter pile casings 3, thereby improving the application range of the support frame 1. Preferably, this embodiment uses two sets of connecting strips 2, that is, four connecting strips 2, which will not be described in detail here.

[0032] In this embodiment, the lower edge surface of the mesh plate 4 overlaps with the upper surface of the upper rod 1011 of the support frame 1 and is fixed to form the support platform. The lower edge surface of the mesh plate 4 overlaps with the upper surface of the upper rod 1011 to form a surface contact stress structure, which disperses the load pressure of the mesh plate 4 and avoids damage caused by local stress concentration. After overlapping, the fixed support platform is formed, which improves the overall rigidity, reduces deformation caused by load changes during construction, and ensures the requirements of high-precision operation. After overlapping and fixing, the mesh plate 4 and the support frame 1 are tightly connected to avoid gaps or loosening, eliminating the hidden danger of workers' feet getting stuck or tripping. The surface contact fixing method reduces the risk of loosening at the connection parts, and the long-term stability is stronger, providing a continuous and reliable protective foundation for high-altitude operations. After the lower edge surface of the mesh plate 4 overlaps with the upper surface of the upper rod 1011 of the support frame 1, a bolt fixing connection method can be used, which is a conventional setting in the prior art and will not be described in detail here.

[0033] In this embodiment, the edge of the mesh plate 4 conforms to the top contour of the support frame 1. This conformal conformity means that the support frame 1 is a foldable structure of a regular octagon, and its top contour is the outer edge shape of a regular octagon. The edge of the mesh plate 4 is pre-processed to perfectly match the shape of this regular octagon. Simultaneously, the outer diameter of the mesh plate 4 precisely matches the circumscribed circle diameter of the top of the support frame 1. Further details are omitted here. The perfect fit between the edge of the mesh plate 4 and the top contour of the support frame 1 forms a seamless connection structure, avoiding the need for... The mismatched contours prevent gaps or overhangs, reducing stress concentration points and improving the overall rigidity of the support platform. The fitted design allows the mesh plate 4 and the support frame 1 to work together to reduce the risk of deformation caused by construction loads and ensure the stability of high-precision operations. The contour-fitting design eliminates gaps between the mesh plate 4 and the support frame 1, preventing workers from getting their feet stuck in gaps, tripping, or tools falling. The fully fitted structure seals off all safety blind spots around the orifice, providing all-round protection for high-altitude orifice operations and reducing the risk of falling into the orifice.

[0034] In this embodiment, the support platform has a strip-shaped operating groove 6 in the middle for installing the functional module 5. The mesh plate 4 has a connecting plate 401 on the side wall near the edge of the strip-shaped operating groove 6 for placing the functional module 5. Several connecting plates 401 can be arranged side by side along the length direction. The strip-shaped operating groove 6 is used to install the functional module 5, such as a measuring instrument positioning module and a concrete guide pipe fixing module. The connecting plate 401 provides an independent and stable bearing base for the functional module 5, avoiding shaking or displacement caused by the functional module 5 being placed directly on the edge of the strip-shaped operating groove 6. Several connecting plates 401 arranged side by side form multi-point support, distributing the load of the module, ensuring the installation accuracy of high-precision equipment such as measuring instruments and guide pipe fixing parts, and reducing construction errors. When the functional module 5 is a concrete guide pipe fixing module, the functional module 5 has a funnel slot mounting hole in the middle for installing a concrete funnel slot, which is a conventional setting in the prior art and will not be described in detail here.

[0035] In this embodiment, a tilt sensor 7 and an alarm device are also included. The tilt sensor 7 and the alarm device are located on the outer edge of the support frame 1 and are evenly distributed circumferentially. The tilt sensor 7 and the audible and visual alarm device are installed on the outer edge of the support frame 1. When the tilt of the support frame 1 or the pile foundation casing 3 exceeds 3°, the alarm is automatically triggered to prompt the workers to make adjustments, thereby achieving real-time safety status monitoring and preventing tilting accidents. The evenly distributed layout along the outer edge of the support frame 1 allows the tilt sensor 7 and the alarm device to collect tilt data simultaneously from multiple directions, avoiding blind spots caused by partial obstruction or installation deviation of a single monitoring point. This ensures that the tilt trend of the support frame 1 and the pile foundation casing 3 is captured from all directions. Multiple evenly distributed tilt sensors 7 form data cross-validation, reducing the measurement error of a single tilt sensor 7 and accurately determining the tilt direction and angle. When the tilt reaches the threshold, multiple alarm devices are triggered simultaneously, enhancing the visibility of the alarm signal and preventing workers from missing the warning information. This provides sufficient time for timely adjustments, which will not be elaborated further here.

[0036] In this embodiment, the support frame unit 101, the connecting strip 2, and the mesh plate 4 are all precast steel components. Steel has high strength and high rigidity, and the mechanical properties of precast steel components are more stable. They can effectively resist construction loads, external impacts, and wear during long-term use, avoiding the risk of deformation or breakage of the support frame 1. Precast steel components are produced in a standardized manner in the factory, with high dimensional accuracy and uniform assembly interfaces. No wet work such as cutting or welding is required on site, and they can be directly and quickly spliced ​​and installed, shortening the support frame construction cycle.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pile foundation casing support suitable for bored cast-in-place piles, characterized in that: The system includes a support frame unit, connecting strips, and a mesh plate. The support frame unit is arranged in sequence to form a support frame. The connecting strips are arranged radially along the pile foundation casing and fixedly connected to the top of the pile foundation casing. The support frame is inserted and fixed to the upper surface of the connecting strips. After being in place, the mesh plate is installed on the top of the support frame to form a support platform.

2. The pile foundation casing support for bored cast-in-place piles according to claim 1, characterized in that: The side walls of adjacent support frame units are hinged together by hinges.

3. The pile foundation casing support for bored cast-in-place piles according to claim 2, characterized in that: The lower surface of the connecting strip has a serrated structure, which is embedded in the upper edge of the pile foundation casing wall to fix the connecting strip.

4. The pile foundation casing support for bored cast-in-place piles according to claim 3, characterized in that: The upper surface of the connecting strip is provided with a limiting groove, which is symmetrically distributed at both ends of the connecting strip. The upper rod of the support frame is embedded in the limiting groove to fix the support frame.

5. The pile foundation casing support for bored cast-in-place piles according to claim 4, characterized in that: The number of connecting strips is at least two sets, and adjacent connecting strips are arranged side by side along the radial direction of the pile foundation casing; one set of connecting strips is perpendicular to the other set of connecting strips.

6. The pile foundation casing support for bored cast-in-place piles according to claim 1, characterized in that: The lower edge of the mesh plate overlaps the upper surface of the upper rod of the support frame and is fixed to form the support platform.

7. The pile foundation casing support for bored cast-in-place piles according to claim 6, characterized in that: The edge of the mesh plate conforms to the top contour of the support frame.

8. The pile foundation casing support for bored cast-in-place piles according to claim 1, characterized in that: The support platform has a strip-shaped operating groove in the middle for installing functional modules. The mesh plate has a connecting plate on the side wall near the edge of the strip-shaped operating groove for placing functional modules. Several connecting plates can be arranged side by side along the length direction.

9. The pile foundation casing support for bored cast-in-place piles according to claim 1, characterized in that: It also includes a tilt sensor and an alarm device, which are located on the outer edge of the support frame and are evenly distributed circumferentially.

10. The pile foundation casing support for bored cast-in-place piles according to claim 1, characterized in that: The support frame unit, connecting strips, and mesh panels are all prefabricated steel components.

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