A core pile follows the pipe construction equipment

Abstract

The utility model discloses a kind of core pile order pipe construction equipment, comprising: guide pipe is used to be placed in the upper portion of the granular material pile, the inner diameter of the guide pipe is greater than the outer diameter of the core pile hammer to be sleeved, and the outer diameter is less than the diameter of the granular material pile;Detachable multifunctional hammer body is set to the inside of the guide pipe, and can reciprocate along the inner wall of the guide pipe under the action of driving device, to form pile hole by ramming the granular material pile located below it, pour into dry hard concrete, and form concrete core pile after being tamped by claw hammer;Positioning mechanism is fixedly connected to the bottom outside of the guide pipe, for making the axis of the guide pipe and the axis of the granular material pile and the core pile established thereafter automatically centering during construction. Through the synergistic effect of guide pipe, built-in rammer and bottom positioning mechanism, the technical problem of accurately resetting concrete rigid core pile in flexible granular material pile is solved, the equipment structure is simple, convenient to operate, and the pile quality is high, with good perpendicularity.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering foundation technology, and in particular relates to a core pile pipe-laying construction device. Background Technology

[0002] In the treatment of unfavorable foundations such as saturated soft soil and silt, a common approach is to first construct loose-material piles (for drainage and compaction) and then implant rigid core piles (to enhance bearing capacity and reduce settlement) to form a composite pile that combines rigidity and flexibility. However, there are the following technical problems associated with driving rigid core piles into already constructed flexible loose-material piles:

[0003] 1) It is difficult to ensure that the core pile is accurately located in the center of the granular material pile. Misalignment will lead to uneven stress and affect the bearing capacity of the composite pile.

[0004] 2) Core piles are prone to tilting during the driving process, which affects the quality of the pile body.

[0005] 3) Direct tamping can easily damage the pile structure of granular material piles, weakening their drainage function.

[0006] 4) Lack of specialized equipment, temporary tools are often used, resulting in poor construction accuracy and low efficiency, and there are safety hazards in the compaction process.

[0007] Therefore, there is an urgent need in this field for a specialized device that can achieve precise centering, ensure verticality, reduce pile disturbance, and improve construction safety. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a core pile straightening construction device that can ensure that rigid core piles are accurately, vertically and efficiently implanted into the center of granular material piles.

[0009] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0010] In some embodiments of this application, a core pile straightening construction device is provided, comprising:

[0011] A guide tube is used to be fitted onto the upper part of the granular material pile. The inner diameter of the guide tube is larger than the outer diameter of the ramming hammer to be fitted, and its outer diameter is smaller than the diameter of the granular material pile.

[0012] A detachable multi-functional hammer is installed inside the guide tube and can reciprocate along the inner wall of the guide tube under the action of the drive device. The multi-functional hammer has two working modes: in the first working mode, it impacts and compacts the loose material at the bottom to form a core pile hole; in the second working mode, after concrete or other core pile material is filled into the pile hole, it compacts the pile body.

[0013] A positioning mechanism is fixedly connected to the bottom outer side of the guide tube, and is used to automatically align the axis of the guide tube with the axis of the granular material pile during construction.

[0014] In some embodiments of this application, the positioning mechanism is an annular wing plate fixed to the bottom end of the guide tube. The inner ring of the annular wing plate is welded to the outer wall of the guide tube, and its outer diameter is smaller than the diameter of the granular material pile.

[0015] In some embodiments of this application, the positioning mechanism is at least three positioning ribs evenly distributed circumferentially along the bottom outer side of the guide tube, and the lower edge of the positioning ribs forms a conical or trumpet-shaped guide surface for sitting on the top of the granular material pile.

[0016] In some embodiments of this application, the positioning mechanism is a detachable tapered guide sleeve, which is fixed to the bottom of the guide tube by bolts or a snap-fit ​​structure.

[0017] In some embodiments of this application, the guide tube is formed by connecting multiple standard pipe sections through flanges; and / or, an observation window is provided on the wall of the guide tube.

[0018] In some embodiments of this application, the top center of the detachable multi-functional hammer body is provided with a mushroom-shaped clamp or lifting ring for connection with a drive device.

[0019] In some embodiments of this application, the detachable multifunctional hammer body is a variable cross-section columnar body, the diameter of its lower working section is adapted to the diameter of the core pile to be formed, and the diameter of its upper part is smaller than the diameter of the lower working section.

[0020] In some embodiments of this application, the driving device is a winch, which is connected to the lifting ring at the top of the detachable multi-functional hammer body via a wire rope; or, the driving device is a hydraulic cylinder, the cylinder body of which is fixed to the top of the guide tube, and its piston rod is connected to the detachable multi-functional hammer body.

[0021] In some embodiments of this application, a replaceable buffer pad is fixed to the bottom working surface of the detachable multi-functional hammer body by bolts.

[0022] Compared with the prior art, the beneficial effect of this utility model is that, through the synergistic effect of the guide tube, the built-in hammer and the bottom positioning mechanism, the technical problem of accurately implanting rigid core piles in flexible granular material piles is solved. The equipment has a simple structure, is easy to operate, and produces high-quality piles with good verticality. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram illustrating the working principle of the compacted pile pier section provided in this embodiment of the utility model;

[0026] Figure 3 A schematic diagram of soil pore water drainage (establishment of planar drainage channels) provided for an embodiment of this utility model;

[0027] Figure 4 A schematic diagram illustrating the working principle of the combined long and short pile pier raft slab provided in this embodiment of the utility model;

[0028] Figure 5 A schematic diagram illustrating the concrete core pile driving process and its function provided for embodiments of this utility model;

[0029] Figure 6 A schematic diagram illustrating the construction process and function of reinforced concrete anti-buoyancy (pull-out) enlarged-base piles provided in this embodiment of the utility model;

[0030] Figure 7 A schematic diagram of the elevation of the load-bearing structure (a load-bearing structure with varying heights and different functional "core piles") provided for an embodiment of this utility model;

[0031] Figure 8 Various load-bearing body plan layouts provided for embodiments of this utility model (the spacing and position of pile piers can be adjusted according to axial pressure). Detailed Implementation

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0033] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.

[0034] Example 1

[0035] Reference Figures 1 to 8The core pile installation equipment described in this embodiment is a specialized device for accurately and efficiently implanting rigid core piles (such as precast concrete piles) into already constructed loose material piles (such as crushed stone piles or sand piles). Its core value lies in ensuring, through the equipment's own structure, that the rigid core pile is accurately and vertically implanted into the center of the loose material pile.

[0036] The guide tube (1) is the skeleton and guiding core of the equipment. Its inner diameter is larger than the outer diameter of the ram (2) to be inserted, and its outer diameter is smaller than the diameter of the bulk material pile, to ensure that it can be smoothly inserted on the outside of the bulk material pile or stably located at the center of its pile top. To adapt to the construction of core piles at different depths, the guide tube (1) can adopt a modular design, consisting of multiple standard pipe sections connected by high-strength flanges (4) and bolts. In addition, an observation window (8) can be opened on the pipe wall of the guide tube (1), which is sealed and covered by a transparent polycarbonate plate so that the operator can observe the situation inside the tube.

[0037] Specifically, the guide tube 1 is preferably made of high-strength seamless steel pipe to ensure overall rigidity and durability under impact. The inner diameter D1 of the guide tube 1 needs to be slightly larger than the outer diameter d of the rigid core pile 100 to be implanted, while its outer diameter D2 needs to be significantly smaller than the diameter D of the prefabricated bulk material pile 200, to ensure that the guide tube 1 can be smoothly fitted onto the outside of the bulk material pile 200 or stably sit at the center of its top.

[0038] To accommodate core pile construction at different depths, the guide pipe 1 adopts a modular design, consisting of multiple standard pipe sections connected by high-strength flanges 4 and bolts. Locating pins can be installed at the flange joints to ensure the straightness of the connected pipe sections.

[0039] In one preferred embodiment, the guide tube 1 has at least one row of observation windows 8 on its wall. These observation windows 8 are sealed and covered by a transparent polycarbonate sheet and fitted with a protective steel grille. Their function is to allow operators to directly observe the settlement of the core pile 100 inside the tube and the position of the tamping hammer 2 during construction.

[0040] The detachable multi-functional hammer 2 is the power actuator of the equipment, and its core feature is that it integrates two functions: punching and extruding holes and compacting piles. The hammer is located inside the guide tube 1 and can reciprocate along the inner wall of the guide tube under the action of the drive device.

[0041] The multi-functional hammer has two working modes:

[0042] The first working mode is extrusion hole formation: In this mode, the hammer is lifted to a certain height and then released, using its huge impact kinetic energy to impact and compact the loose material pile below it, thereby forcibly forming a regular and dense pile hole in the flexible loose material, preparing for the implantation of a rigid core pile.

[0043] The second working mode is pile compaction: After the pile hole is formed and filled with dry-hardened concrete or other core pile materials, there is no need to change equipment; the same hammer can be used immediately to continue the compaction operation. In this mode, the impact energy of the hammer is transferred to the filled material, making it dense and shaped, ultimately forming a high-strength concrete core pile.

[0044] The detachable multi-functional hammer 2 has a mushroom-shaped locking head or lifting ring 6 at its top center for connection to the wire rope or piston rod of the drive device. In a preferred embodiment, the hammer is designed as a variable cross-section column, with the diameter of its lower working section 21 matching the diameter of the core pile to be formed, to ensure that the impact force is concentrated and effectively applied to the bottom of the pile hole or the top of the pile; the diameter of its upper part can be smaller than the diameter of the lower working section to reduce the overall weight and friction with the inner wall of the guide tube 1.

[0045] To further optimize functionality, a replaceable buffer pad 9 can be bolted to the bottom working surface of the detachable multi-functional hammer 2. This buffer pad is preferably made of high-strength nylon or polyurethane. In the first working mode, it protects the hammer from direct impact reaction force, while in the second working mode, it buffers the impact on the concrete pile head, preventing pile head breakage. This demonstrates the multi-functional hammer's design's consideration and optimization of both working modes.

[0046] The positioning mechanism 3 is crucial for ensuring construction accuracy. It is fixedly connected to the bottom outer side of the guide tube 1 and automatically aligns the axis of the guide tube 1 with the axis of the granular material pile during construction. In specific implementations, the positioning mechanism 3 can take the following forms:

[0047] The positioning mechanism 3 is an annular wing plate 31 fixed to the bottom end of the guide tube 1. The inner ring of the annular wing plate is welded to the outer wall of the guide tube 1, and its outer diameter is smaller than the diameter of the granular material pile.

[0048] The positioning mechanism 3 consists of at least three positioning ribs 32 evenly distributed circumferentially along the bottom outer side of the guide tube 1. The lower edges of these ribs together form a conical or trumpet-shaped guide surface 321, which can guide the guide tube to accurately sit on the top of the granular material pile.

[0049] The positioning mechanism 3 is a detachable conical guide sleeve. This guide sleeve is connected to the bottom of the guide tube 1 by bolts or a snap-fit ​​structure, which facilitates replacement according to different loose pile diameters and enhances the versatility of the equipment.

[0050] The drive device is used to provide power to the ram 2. The drive device can be a winch, which is connected to the lifting ring 6 at the top of the detachable multi-functional hammer body 2 via a wire rope; or, the drive device can be a hydraulic cylinder, the cylinder body of which is fixed to the top of the guide tube 1, and its piston rod is connected to the detachable multi-functional hammer body 2.

[0051] Construction process overview:

[0052] First, the assembled guide tube 1 is precisely and vertically positioned on top of the loose material pile to be constructed using the positioning mechanism 3 at its bottom. Then, the first precast concrete core pile is hoisted into the guide tube 1 and supported on top of the loose material pile. Next, the detachable multi-functional hammer 2 is hoisted into the guide tube 1, and the drive device is activated, causing the hammer 2 to repeatedly rise and fall, impacting the top of the core pile and driving it into the loose material pile body to form a pile hole. After the pile hole is formed, dry-hardened concrete can be poured in and compacted using the same hammer 2 to form a concrete core pile. If the core pile needs to be lengthened, the hoisting and compaction steps are repeated until the design elevation is reached.

[0053] Example 2

[0054] The embodiments of this application employ some of the technical features described in the above embodiments, including:

[0055] The guide tube 1 is the skeleton and guiding core of the equipment. It is preferably made of high-strength seamless steel pipe to ensure overall rigidity and durability under impact. The inner diameter D1 of the guide tube 1 needs to be slightly larger than the outer diameter d of the rigid core pile 100 to be implanted, while its outer diameter D2 needs to be significantly smaller than the diameter D of the prefabricated bulk material pile 200, to ensure that the guide tube 1 can be smoothly fitted onto the outside of the bulk material pile 200 or stably sit at the center of its top.

[0056] To accommodate core pile construction at different depths, the guide pipe 1 adopts a modular design, consisting of multiple standard pipe sections connected by high-strength flanges 4 and bolts. Locating pins can be installed at the flange joints to ensure the straightness of the connected pipe sections.

[0057] In one preferred embodiment, the guide tube 1 has at least one row of observation windows 8 on its wall. These observation windows 8 are sealed and covered by a transparent polycarbonate sheet and fitted with a protective steel grille. Their function is to allow operators to directly observe the settlement of the core pile 100 inside the tube and the position of the tamping hammer 2 during construction.

[0058] To ensure the smooth movement of the ramming hammer 2 and prevent its rotation, at least two vertical slide rails 5 are welded to the inner wall of the guide tube 1. (See attached...) Figure 1 As shown, the cross-section of the slide rail 5 is preferably T-shaped or dovetail-shaped, which can effectively prevent the ram 2 from derailing during the lifting process.

[0059] The detachable multi-functional hammer body 2 is the power actuation component of the equipment. It is integrally cast from cast steel to achieve a large impact mass and good structural strength.

[0060] The tamping hammer 2 is designed as a variable cross-section column. The diameter of its lower working section 21 is adapted to the diameter of the core pile 100 to ensure that the impact force is concentrated and effectively transmitted to the top of the pile, preventing eccentric tamping from causing the pile body to crack. The diameter of its upper section 22 can be appropriately reduced to reduce weight and avoid excessive friction with the inner wall of the guide tube 1.

[0061] At the top center of the ram 2, there is a forged lifting ring 6 for connecting to the wire rope of the drive device.

[0062] On the side of the ram 2, there is a groove 23 that precisely matches the slide rail 5 inside the guide tube. A wear-resistant copper sleeve or an engineering plastic bushing can be embedded in the groove 23 to reduce friction and noise.

[0063] In a further optimized embodiment, a buffer pad 9 is bolted to the bottom working surface of the ram 2. This buffer pad 9 is preferably made of high-strength nylon or polyurethane material, and its function is to buffer the enormous impact force, protect the ram itself and the core pile head, and prevent concrete from cracking.

[0064] The positioning mechanism 3 is crucial for ensuring construction accuracy. Its core function is to automatically align the axis of the guide tube 1 with the axis of the prefabricated granular material pile 200.

[0065] In the first embodiment, the positioning mechanism 3 is an annular wing plate 31 fixed to the bottom end of the guide tube 1. The inner ring of the annular wing plate 31 is welded to the outer wall of the guide tube 1, and its outer diameter D3 is slightly smaller than the diameter D of the bulk material pile 200. During construction, the annular wing plate 31 is placed on the top of the pile, and relying on its own geometric center, fast and accurate centering can be achieved.

[0066] In the second embodiment, the positioning mechanism 3 consists of at least three positioning ribs 32 evenly distributed circumferentially along the bottom outer side of the guide tube 1. The lower edges of these ribs 32 together form a trumpet-shaped guide surface 321, which can guide the guide tube 1 to accurately fall into the top of the slightly deformed loose material pile.

[0067] In the third embodiment, the positioning mechanism 3 is a detachable conical guide sleeve (not shown in the figure). The guide sleeve is connected to the bottom of the guide tube 1 by bolts or quick-clamp structure, which makes it easy to replace guide sleeves of different specifications according to different granular pile diameters, thus enhancing the versatility of the equipment.

[0068] The drive and safety system includes a drive unit for lifting the rammer 2. It can be a standalone winch connected to a lifting ring 6 at the top of the rammer via a wire rope. Alternatively, it can be a hydraulic cylinder mounted at the top of the guide tube 1, with its piston rod directly connected to the rammer 2 for more precise stroke control.

[0069] At the top of the guide tube 1, an openable protective cover 7 is hinged. This cover 7 is made of steel plate with a central hole for a steel wire rope or piston rod to pass through. Safety latches 71 are provided along the edge of the cover 7 to lock during construction, preventing debris from falling into the tube or the tamping hammer from accidentally jumping out, ensuring operational safety.

[0070] Secondly, its complete and precise workflow is described in detail:

[0071] First, the construction of the bulk material pile 200 is completed using a double-lobed automatic closing replacement pile machine. Then, the assembled guide tube 1 is lifted using a crane or a special jack and guided by the positioning mechanism 3 (annular wing plate 31 or positioning rib plate 32) at the bottom, so that it is accurately and vertically placed on the top of the bulk material pile 200 to be constructed.

[0072] Open the safety lock 71 of the protective cover plate 7, and use a crane to slowly lift the first precast concrete core pile 100 (or steel cage) through the top of the guide pipe 1, so that its bottom is stably supported on the top of the loose material pile 200.

[0073] The detachable multi-functional hammer 2 is hoisted into the guide tube 1, ensuring that its groove 23 engages with the slide rail 5 inside the tube. The drive device (winch) is started to raise the hammer 2 to the predetermined height and then release it. The hammer 2 falls freely along the guide rail 5, and its bottom buffer pad 9 impacts the top of the core pile 100, forcing it into the dense, loose material pile body. The operator can monitor the sinking process through the observation window 8.

[0074] When the first core pile is driven to near the top of the guide pipe 1, the second core pile is hoisted in and reliably connected to the first pile using welding or flange connections. Repeat step 3 to continue driving until the entire core pile assembly is driven to the design elevation.

[0075] After construction is completed, the tamping hammer 2 is hoisted out, the protective cover 7 is closed and locked, and the guide pipe 1 is removed. The core pile implantation work at this pile location is now complete, and the equipment can be moved to the next pile location.

[0076] The comprehensive beneficial effects that this specific implementation method can achieve are as follows:

[0077] The combination of a positioning mechanism and a guide tube ensures the vertical implantation of the core pile into the center of the granular material pile, avoiding the loss of bearing capacity caused by deviation. Under the constraint of the guide tube, the hammer strikes vertically, concentrating energy and increasing efficiency, effectively driving the core pile into the dense pile body to form a high-bearing-capacity composite pile. The design of the protective cover plate and anti-rotation rail greatly improves operational safety. The observation window makes the construction process visible, facilitating monitoring and decision-making. The modular guide tube and replaceable positioning mechanism enable the equipment to adapt to engineering needs with different pile lengths and diameters, making it highly versatile.

[0078] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "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 application 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, they should not be construed as limitations on this application.

[0079] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0081] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A core pile installation device for embedding rigid core piles into completed granular material piles, characterized in that, include: A guide tube (1) is used to be fitted onto the upper part of the granular material pile. The inner diameter of the guide tube (1) is larger than the outer diameter of the hammer to be fitted, and its outer diameter is smaller than the diameter of the granular material pile. A detachable multi-functional hammer (2) is installed inside the guide tube (1) and can reciprocate along the inner wall of the guide tube (1) under the action of the driving device. The multi-functional hammer has two working modes: in the first working mode, it impacts and tamps the loose material at the bottom to form a core pile hole; in the second working mode, after concrete or other core pile material is filled into the pile hole, it compacts the pile body. The positioning mechanism (3) is fixedly connected to the bottom outer side of the guide tube (1) and is used to automatically align the axis of the guide tube (1) with the axis of the granular material pile during construction.

2. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The positioning mechanism (3) is an annular wing plate fixed to the bottom end of the guide tube (1). The inner ring of the annular wing plate is welded to the outer wall of the guide tube (1), and its outer diameter is smaller than the diameter of the granular material pile.

3. The core pile and pipe-laying construction equipment according to claim 1, characterized in that, The positioning mechanism (3) consists of at least three positioning ribs evenly distributed circumferentially along the bottom outer side of the guide tube (1), and the lower edge of the positioning ribs forms a conical or trumpet-shaped guide surface for sitting on the top of the granular material pile.

4. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The positioning mechanism (3) is a detachable conical guide sleeve, which is fixed to the bottom of the guide tube (1) by bolts or snap-fit ​​structure.

5. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The guide tube (1) is formed by connecting multiple standard pipe sections through flanges (4); and / or, an observation window (8) is provided on the pipe wall of the guide tube (1).

6. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The top center of the detachable multi-functional hammer (2) is provided with a mushroom-shaped clamp or swivel (6) for connection with the drive device.

7. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The detachable multi-functional hammer (2) is a variable cross-section column. The diameter of its lower working section is adapted to the diameter of the core pile to be formed, and the diameter of its upper part is smaller than the diameter of the lower working section.

8. The core pile pipe-laying construction equipment according to claim 1, characterized in that, The driving device is a winch, which is connected to the lifting ring (6) at the top of the detachable multi-functional hammer (2) by a wire rope; or, the driving device is a hydraulic cylinder, the cylinder body of which is fixed to the top of the guide tube (1), and its piston rod is connected to the detachable multi-functional hammer (2).

9. The core pile pipe-laying construction equipment according to any one of claims 1 to 8, characterized in that, The bottom working surface of the detachable multi-functional hammer (2) is fixed with a replaceable buffer pad (9) by bolts.

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