Positioning device for pile foundation construction

Abstract

A positioning equipment for pile foundation construction belongs to the technical field of construction site construction auxiliary equipment and comprises an annular plate with multiple mounting holes, the upper surface of the annular plate is fixedly provided with a directional cylinder, the front surface of the directional cylinder is provided with a grouting opening, six convex grooves are vertically and parallelly provided on the outer surface of the directional cylinder, a detachable sliding block is slidably installed in each convex groove, a limiting device is slidably installed between the upper and lower corresponding convex grooves, a guide cylinder is detachably installed in the directional cylinder, the inner diameter of the guide cylinder is the same as the peripheral size of a spiral drill used for digging a pile hole, a conical extension part is integrally formed on the top of the guide cylinder, the sliding block is located between the guide cylinder and the limiting device, and the limiting device and the sliding block cooperate to tightly fix the guide cylinder in the directional cylinder, so that the soil backfilling and the pile body eccentricity can be avoided, manpower can be saved, efficiency and adaptability can be improved, and the construction requirements of different specifications of pile holes can be met.

Description

Technical Field

[0001] This utility model belongs to the technical field of construction site auxiliary equipment, specifically relating to a positioning device for pile foundation construction. Background Technology

[0002] Pile foundations, as a type of deep foundation with high bearing capacity, wide applicability, and a long history, connect the tops of several piles into a whole through a pile cap, effectively bearing both dynamic and static loads. Pile foundations can penetrate soft, highly compressible soil layers or water, transferring loads to harder, denser, or less compressible bearing layers, and are widely used in numerous projects such as high-rise buildings, ports, and bridges. With improvements in production levels and advancements in science and technology, the types, processes, design theories, calculation methods, and application ranges of pile foundations have all seen significant development. In the construction of pile foundations, the accuracy of positioning is crucial. Although existing positioning devices can achieve vertical positioning and ensure the vertical installation of foundation piles, many problems still exist in actual construction.

[0003] During the excavation of pile holes, soil excavated in advance often remains around the hole opening. This residual soil can easily fall into the unfilled pile hole, causing excessive sediment thickness and severely affecting the bonding performance between the pile and the foundation, thereby reducing the bearing capacity and stability of the pile foundation. To avoid this situation, construction workers often need to manually move the soil around the hole opening to surrounding areas. This method is not only time-consuming and labor-intensive, but also reduces construction efficiency and increases labor costs.

[0004] Furthermore, during the pile installation process and subsequent concrete pouring, the existing positioning device cannot reliably ensure that the pile remains centered in the foundation. This can lead to eccentricity of the pile after concrete pouring, resulting in uneven load distribution across different parts of the pile, excessive local stress, and potential problems such as pile cracking and deformation. This affects the service life and safety of the pile foundation, posing a potential risk to the overall quality of the project.

[0005] To address these technical problems, a positioning device for pile foundation construction is provided. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a positioning device for pile foundation construction, which solves the problems of existing positioning devices being unable to handle residual soil around the pile hole, resulting in excessive sediment, requiring laborious manual transportation, and being unable to guarantee that the pile is in the center of the foundation, causing pile eccentricity.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A positioning device for pile foundation construction includes an annular plate with multiple mounting holes. A directional cylinder is fixedly installed on the upper surface of the annular plate. A grouting port is opened through the front surface of the directional cylinder. Six convex grooves are opened through the outer surface of the directional cylinder in parallel from top to bottom. The six convex grooves are arranged in groups of three in a circumferentially horizontally and at equal intervals. A detachable slider is slidably installed in each convex groove, and a limiting device is slidably installed between two corresponding upper and lower convex grooves. A guide cylinder is detachably installed inside the directional cylinder. The inner diameter of the guide cylinder is the same as the outer diameter of the auger used to excavate the pile hole, and a conical extension is integrally formed on the top of the guide cylinder. The slider is located between the guide cylinder and the limiting device. The limiting device cooperates with the slider to press and fix the guide cylinder inside the directional cylinder.

[0008] In the above technical solution, the bottom outer diameter of the tapered extension is larger than the outer diameter of the annular plate.

[0009] In the above technical solution, the limiting device includes a bearing seat with an internal bearing. The bearing seat is fixedly installed on the outer surface of the directional cylinder, and a threaded rod is rotatably installed inside the bearing seat. A U-shaped frame is screwed onto the outer surface of the threaded rod. The U-shaped frame is inserted and slidably installed between two corresponding upper and lower convex grooves. Both ends of the U-shaped frame are provided with mounting grooves, and guide wheels are rotatably installed in each mounting groove.

[0010] In the above technical solution, a torsion block is welded and fixedly installed at the end of the threaded rod away from the bearing seat.

[0011] In the above technical solution, the upper surface of the U-shaped frame is engraved with recessed length distance markings.

[0012] In the above technical solution, the guide cylinder is T-shaped, and a lower annular groove is provided on the lower side of the upper flange of the guide cylinder. The lower annular groove is snapped onto the top of the directional cylinder.

[0013] The positioning device for pile foundation construction of this utility model has the following advantages compared with the prior art: This utility model achieves an upward extension of the pile hole opening height by setting a directional cylinder, a guide cylinder, and a conical extension, with the bottom outer diameter of the conical extension being larger than the outer diameter of the annular plate. This allows the extracted soil to naturally fall to the outside of the annular plate, avoiding excessive sediment thickness caused by backfilling the pile hole with soil. At the same time, it eliminates the manual transportation step, saving manpower and improving construction efficiency. By setting a convex groove, a slider, and a limiting device consisting of a bearing seat, a threaded rod, a U-shaped frame, and a guide wheel, the guide cylinder is firmly fixed, preventing it from shaking and shifting, ensuring the stability and positioning accuracy of the auger drilling construction. Furthermore, during pile installation, the guide wheel can be adjusted to keep the pile at the center of the pile hole, avoiding problems such as uneven load distribution caused by pile eccentricity after concrete pouring. By designing the guide cylinder as a T-shape and opening an annular groove, a detachable connection between the guide cylinder and the directional cylinder is achieved. Furthermore, the inner diameter of the guide cylinder can be customized according to the size of the auger drill. When used in conjunction with a limiting device, it can increase the equipment's adaptability to the construction of foundation pile holes of different specifications. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the directional cylinder of this utility model.

[0017] Figure 4 This is a schematic diagram of the limiting device structure of this utility model.

[0018] Figure 5 for Figure 3 Detailed image of point a in the middle.

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the guide cylinder of this utility model.

[0020] Figure 7 This is a structural schematic diagram of the present invention for positioning the pile.

[0021] Figures 1-7 The components are as follows: 1. Annular plate; 11. Mounting hole; 111. Anchor bolt; 2. Directional cylinder; 21. Grouting port; 22. Convex groove; 221. Sliding block; 3. Limiting device; 31. Bearing seat; 32. Threaded rod; 33. U-shaped frame; 331. Mounting groove; 34. Guide wheel; 4. Guide cylinder; 41. Conical extension; 42. Lower annular groove; 5. Pile body. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In this embodiment, front, back, left, right, top, and bottom are... Figure 2 Describe the reference plane. See [link / reference] Figures 1-7 This utility model provides a technical solution: A positioning device for pile foundation construction includes an annular plate 1 with multiple mounting holes 11. A directional cylinder 2 is welded and fixedly installed on the upper surface of the annular plate 1. A grouting port 21 is opened through the front surface of the directional cylinder 2. Six convex grooves 22 are opened through the outer surface of the directional cylinder 2 in parallel from top to bottom. The six convex grooves 22 are distributed horizontally and equidistantly in groups of three. A detachable slider 221 is slidably installed in each convex groove 22. A limiting device 3 is slidably installed between two corresponding convex grooves 22. A guide cylinder 4 is detachably installed in the directional cylinder 2. The inner diameter of the guide cylinder 4 is the same as the outer size of the auger used to excavate the pile hole. The top of the guide cylinder 4 is integrally formed with a conical extension 41. The slider 221 is located between the guide cylinder 4 and the limiting device 3. The limiting device 3 and the slider 221 cooperate to press and fix the guide cylinder 4 in the directional cylinder 2, preventing the guide cylinder 4 from shaking or shifting during construction, ensuring the stability and positioning accuracy of the auger during construction, and further reducing the pile hole deviation problem caused by unstable guidance.

[0024] When the auger is used for pile hole construction, the directional cylinder 2 and guide cylinder 4 are set up, which is equivalent to extending the height of the pile hole opening upward. The soil extracted can be naturally scattered to the outside of the annular plate 1 under the action of the conical extension 41. There is no need for manual transportation, which effectively avoids the problem of soil backfilling into the pile hole and causing the sediment thickness to exceed the standard. It also saves manpower, improves construction efficiency, and reduces labor costs.

[0025] To prevent scattered soil from covering the annular plate 1 and affecting subsequent equipment disassembly, the bottom outer diameter of the conical extension 41 should be designed to be larger than the outer diameter of the annular plate 1.

[0026] It should be noted that, in combination Figure 3 , Figure 4 and Figure 5 As shown, the limiting device 3 includes a bearing seat 31 with an internal bearing. The bearing seat 31 is fixedly installed on the outer surface of the directional cylinder 2 by bolts. A threaded rod 32 is rotatably installed in the bearing seat 31 through the bearing. A torsion block is welded and fixedly installed at the end of the threaded rod 32 away from the bearing seat 31. A U-shaped frame 33 is screwed onto the outer surface of the threaded rod 32. The U-shaped frame 33 is inserted and slidably installed between two corresponding upper and lower convex grooves 22. Both ends of the U-shaped frame 33 are provided with mounting grooves 331. Guide wheels 34 are rotatably installed in the mounting grooves 331 through a rotating shaft. The guide wheels 34 are made of alloy steel and can effectively prevent extrusion deformation during use.

[0027] When it is necessary to move the guide wheel 34 toward or away from the guide cylinder 4, the U-shaped frame 33 can be driven by turning the threaded rod 32 to move the guide wheel 34, thereby moving the guide wheel 34 toward the guide cylinder 4 relative to the slider 221, thus achieving tight fixing of the guide cylinder 4.

[0028] Similarly, when the pile hole is excavated and the pile body 5 is installed, the guide cylinder 4 is released in advance and removed. Then, according to the outer diameter of the pile body 5, the guide wheel 34 in the three limiting devices 3 is adjusted to a suitable position in advance to ensure that the pile body 5 is always in the center position during the lowering and pouring process. This avoids problems such as uneven load distribution and excessive local stress caused by the eccentricity of the pile body 5 after concrete pouring, and ensures the service life and safety of the pile foundation.

[0029] When adjusting the three limit devices 3, to facilitate precise adjustment of the distance and ensure that the adjustment of the three is exactly the same, the following steps are taken: Figure 4 As shown, recessed length distance markings are engraved on the upper surface of the U-shaped frame 33. The unit of these markings is centimeters. By setting length distance markings on the U-shaped frame 33, operators can accurately adjust the position of each guide wheel 34 to ensure that the adjustment distances of the three are the same, further ensuring that the pile body 5 is in the center of the foundation, thus improving the accuracy and reliability of the positioning.

[0030] In addition, combined Figure 3 and Figure 6 As shown, the guide cylinder 4 is T-shaped, with a lower annular groove 42 on the lower side of its upper flange. The lower annular groove 42 is snapped onto the top of the directional cylinder 2. After the guide cylinder 4 is limited by the contact limiting device 3, it can move upward to separate from the directional cylinder 2. Under the premise that the outer diameter of the guide cylinder 4 remains unchanged, its inner diameter can be customized according to the outer dimensions of different sizes of auger drills. In this way, when constructing foundation pile holes of different specifications, guide cylinders 4 with different inner diameters can be replaced for positioning construction to meet the construction requirements of foundation pile holes of different specifications and increase the adaptability of the equipment.

[0031] Finally, it should be noted that after the annular plate 1 is attached to the ground, anchor rods 111 can be inserted through each mounting hole 11 to penetrate into the soil, thereby fixing the positioning equipment as a whole and ensuring the stability of the foundation pile hole excavation process.

[0032] Operating principle: First, based on the location of the foundation pile hole, the annular plate 1 is fixed to the opening surface by anchor rods 111 passing through the installation hole 11. Then, sliders 221 are placed in each of the convex grooves 22. A guide cylinder 4, adapted to the size of the auger drill, is inserted into the directional cylinder 2. Three limiting devices 3, in conjunction with the sliders 221, clamp and fix the guide cylinder 4 inside the directional cylinder 2. The auger drill then penetrates the guide cylinder 4 to perform ground drilling. During this process, the extracted soil is guided by the conical extension 41 and scattered onto the ground around the annular plate 1, eliminating the need for manual transport, saving manpower, and improving construction efficiency. After drilling is completed, the auger drill is removed, the limiting devices 3 are unlocked from fixing the guide cylinder 4, and the guide cylinder 4 is removed, along with the sliders 221. Then, using external lifting equipment, the pile body 5 is lifted and inserted into the directional cylinder 2. The guide wheels 34 of the three limiting devices 3 are adjusted to be equidistant from the pile body 5 before clamping and positioning, ensuring the pile body 5 is centered in the pile hole. The pile body 5 is then slowly lowered to the bottom of the pile hole. Finally, concrete is poured from the grouting port 21 between the pile body 5 and the pile hole, ensuring the concrete is evenly distributed between them. This results in a more uniform load distribution across the pile body 5 after construction, preventing cracking and deformation. Before the concrete hardens, external shielding materials such as covers or enclosures can be installed at the grouting port 21 and the top of the directional cylinder 2 to prevent debris from contacting the concrete and ensure construction quality.

Claims

1. A positioning device for pile foundation construction, comprising an annular plate (1) with multiple mounting holes (11), characterized in that, An directional cylinder (2) is fixedly installed on the upper surface of the annular plate (1). A grouting port (21) is opened through the front surface of the directional cylinder (2). Six convex grooves (22) are opened through the outer surface of the directional cylinder (2) in parallel from top to bottom. The six convex grooves (22) are arranged in groups of three in a circumferential horizontal equidistant distribution. A detachable slider (221) is slidably installed in each convex groove (22). A limit device (3) is slidably installed between two corresponding convex grooves (22). The directional cylinder (2) is detachably installed with a guide cylinder (4). The inner diameter of the guide cylinder (4) is the same as the outer diameter of the spiral drill used for excavating the foundation pile hole. The top of the guide cylinder (4) is integrally formed with a tapered extension (41). The slider (221) is located between the guide cylinder (4) and the limiting device (3). The limiting device (3) and the slider (221) cooperate to press and fix the guide cylinder (4) inside the directional cylinder (2).

2. The positioning device for pile foundation construction according to claim 1, characterized in that, The bottom outer diameter of the tapered extension (41) is larger than the outer diameter of the annular plate (1).

3. A positioning device for pile foundation construction according to claim 1 or 2, characterized in that, The limiting device (3) includes a bearing seat (31) with an internal bearing. The bearing seat (31) is fixedly installed on the outer surface of the directional cylinder (2), and a threaded rod (32) is rotatably installed inside the bearing seat (31). A U-shaped frame (33) is screwed onto the outer surface of the threaded rod (32). The U-shaped frame (33) is inserted and slidably installed between two corresponding upper and lower convex grooves (22). Both ends of the U-shaped frame (33) are provided with mounting grooves (331), and guide wheels (34) are rotatably installed in the mounting grooves (331).

4. A positioning device for pile foundation construction according to claim 3, characterized in that, A torsion block is welded and fixedly installed at the end of the threaded rod (32) away from the bearing seat (31).

5. A positioning device for pile foundation construction according to claim 3, characterized in that, The upper surface of the U-shaped frame (33) is engraved with recessed length distance markings.

6. A positioning device for pile foundation construction according to claim 1, characterized in that, The guide cylinder (4) is T-shaped, and a lower annular groove (42) is provided on the lower side of the upper flange of the guide cylinder (4). The lower annular groove (42) is snapped onto the top of the directional cylinder (2).

Images