Positioning device and construction method for embedded parts of micro-grouting foundation for mountain photovoltaic fixed support

Abstract

This invention provides a positioning device and construction method for embedded parts of micro-grown foundations for mountain photovoltaic fixed supports. The positioning device includes a frame body, a support and leveling assembly, an orifice positioning assembly, a radial fine-tuning clamping assembly, and an elevation limiting assembly. The orifice positioning assembly is installed in the middle of the frame body and includes a positioning ring seat fixed in the installation hole and a through-type positioning sleeve fixed in the positioning ring seat. Multiple sets of radial fine-tuning clamping assemblies are provided on the positioning sleeve. The frame body is positioned above the orifice of the micro-hole anchor pile. The lower part of the embedded part of the micro-grown foundation is inserted into the micro-grown pile hole through the positioning sleeve, and the upper part of the embedded part is placed inside the positioning sleeve and clamped and adjusted by the multiple sets of radial fine-tuning clamping assemblies. This invention improves the leveling efficiency and stability of the device on different slopes and locally uneven ground, and improves the accuracy of controlling the center position and verticality of the embedded part.

Description

Technical Field

[0001] This invention belongs to the field of mountain photovoltaic power generation engineering technology, specifically a positioning device and construction method for pre-embedded parts of micro-grouting foundation for mountain photovoltaic fixed support. Background Technology

[0002] With the increasing global demand for renewable energy, photovoltaic (PV) power generation, as a clean and renewable energy source, is receiving more and more attention and promotion. In PV power generation projects, the fixed support structure, as a key structure supporting PV modules, is crucial for ensuring the stability and long-term operation of the entire project through its foundation construction technology.

[0003] Mountain photovoltaic (PV) projects are often located in low hills, valley slopes, and terrace transition zones. Construction sites typically present challenges such as steep slopes, narrow working faces at the borehole openings, fragmented work processes, and uneven ground. To balance uplift resistance and surface disturbance control, micro-drilled cast-in-place piles have become a commonly used foundation type for mountain PV projects. The construction of micro-drilled cast-in-place piles involves drilling holes in the construction area, placing pre-embedded components within the holes, and then pouring concrete to form the pile. Currently, pre-embedded components are typically temporarily suspended and positioned using timber, steel pipes, wire, or simple angle steel. This positioning method lacks overall rigidity, making it difficult to quickly level and stably anchor on slopes. Furthermore, during concrete pouring, the pre-embedded components are prone to center shift, tilting, and elevation drift, failing to guarantee stable support for the PV system.

[0004] In addition, existing micro-drilled cast-in-place piles are characterized by small hole diameter, large hole depth, and limited hole opening space. If a stable coaxial reference cannot be established at the hole opening and continuously checked during the pouring process, the exposed length, verticality, and center position of the embedded parts cannot consistently meet the requirements of subsequent support installation. Therefore, it is necessary to provide a rigid positioning scheme that takes into account slope adaptability, hole opening positioning, elevation limit, and pouring disturbance resistance. Summary of the Invention

[0005] To address the installation and positioning problem of embedded parts in micro-hole cast-in-place pile foundations in existing technologies, a positioning device and construction method for embedded parts of micro-hole cast-in-place foundations for mountain photovoltaic fixed supports are provided. This positioning device can ensure the accuracy and stability of the installation of embedded parts of micro-hole cast-in-place foundations for photovoltaic fixed supports, and ensure that the embedded parts do not shift or tilt during the concrete pouring process.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a positioning device for a pre-embedded component of a micro-grouting foundation for a mountain photovoltaic fixed support. The positioning device includes a frame body, a support and leveling assembly, an orifice positioning assembly, a radial fine-tuning clamping assembly, and an elevation limiting assembly. Multiple sets of the support and leveling assembly are distributed below the frame body. Each set of the support and leveling assembly includes a telescopic leg and an anchoring foot located at the bottom of the telescopic leg. An installation hole matching the micro-grouting pile hole is provided in the middle of the frame body. The orifice positioning assembly includes a positioning ring seat fixed in the installation hole and a through-type positioning sleeve fixed in the positioning ring seat. The upper end of the positioning sleeve is higher than the top surface of the frame body. Multiple sets of radial fine-tuning clamping assemblies are provided at the portion of the positioning sleeve higher than the frame body, and these multiple sets of radial fine-tuning clamping assemblies are arranged circumferentially along the positioning sleeve.

[0007] The main frame spans above the opening of the micro-grown pile hole, the positioning sleeve is directly opposite the opening of the micro-grown pile hole, the lower part of the embedded part of the micro-grown pile foundation is inserted into the micro-grown pile hole through the positioning sleeve, and the upper part of the embedded part is placed in the positioning sleeve and is clamped and adjusted by multiple sets of radial fine-tuning clamping components.

[0008] The elevation limiting component is located on the top of the positioning sleeve. The elevation limiting component includes a support ring fixed to the top of the positioning sleeve and an adjusting ring arranged parallel above the support ring. The adjusting ring and the support ring are connected by a height adjustment mechanism, and a scale is provided on the side of the adjusting ring.

[0009] The preferred technical solution of the present invention is as follows: the main body of the frame is a cross-shaped frame, the orifice positioning component is fixedly installed at the center of the cross-shaped frame, and the support and leveling components are provided in four sets, which are respectively set below the ends of the four cantilever arms of the cross-shaped frame. The telescopic legs of each support and leveling component are connected to the cross-shaped frame through a threaded adjustment pair and are provided with a locking component.

[0010] The preferred technical solution of this invention is as follows: Multiple rectangular slots are provided on each positioning sleeve, the positions of which correspond to the installation positions of the radial fine-tuning clamping components. Each rectangular slot opens downwards towards the inner wall of the positioning sleeve. Multiple sets of radial fine-tuning clamping components are installed within the rectangular slots. Each set of radial fine-tuning clamping components includes a horizontal threaded rod, a clamping plate, and a threaded sleeve plate. The horizontal threaded rod is rotatably installed within the rectangular slot, with one end extending out of the outer wall of the positioning sleeve and connected to a knob, and the other end having a limiting block. The threaded sleeve plate is threaded onto the horizontal threaded rod. The clamping plate is located at the opening end of the rectangular slot and is connected to the threaded sleeve plate via a connecting rod. Two slides parallel to the horizontal threaded rod are symmetrically arranged on both sides of the inner cavity of the rectangular slot. Slider blocks matching the slides are symmetrically arranged on both sides of the threaded sleeve plate, and the sliders on both sides of the threaded sleeve plate are slidably connected to the corresponding slides. Rotating the knob drives the horizontal threaded rod to rotate, thereby moving the threaded sleeve plate along the slide guide, causing the clamping plate to clamp or loosen.

[0011] A preferred technical solution of the present invention: The height adjustment mechanism of the elevation limiting component includes a vertical threaded rod, the lower end of which is rotatably connected to the top surface of the support ring, and the upper end of which extends out of the adjusting ring and is connected to a knob. The adjusting ring is threadedly connected to the vertical threaded rod. A guide rod is provided through the adjusting ring, located on the other side of the adjusting ring and parallel to the vertical threaded rod. The lower end of the guide rod is fixedly connected to the upper end surface of the support ring, and a limiting ring is provided at the top of the guide rod. The scale is parallel to the vertical threaded rod and has vertical graduation lines.

[0012] The preferred technical solution of the present invention is as follows: the telescopic legs of each set of supporting leveling components are connected to the corresponding anchor feet through universal joints. The anchor feet are provided with mounting holes for cooperating with ground anchors, expansion joints and temporary pads. The frame body is provided with horizontal observation pieces or leveling reference lines.

[0013] The preferred technical solution of the present invention is as follows: the top surface of the positioning ring is flush with the top surface of the frame body, the upper and lower parts of the positioning sleeve extend out of the positioning ring seat, and a horizontal scale line is provided on the positioning ring seat; multiple sets of radial fine-tuning clamping components are evenly distributed at equal intervals in the area where the positioning sleeve is higher than the positioning ring seat.

[0014] The preferred technical solution of the present invention is as follows: each clamping plate is a replaceable clamping structure, and its inner arc surface is provided with an anti-slip elastic pad. Each clamping plate is configured with an arc surface that matches the outer diameter of the embedded part. There are two connecting rods, which are arranged in parallel on both sides of the horizontal threaded rod. A fixing plate is fixedly installed at a position away from the opening of the rectangular slot. The horizontal threaded rod passes through the fixing plate and is rotatably connected to the fixing plate through a bearing.

[0015] To achieve the above-mentioned technical objectives, the present invention provides a construction method for a pre-embedded component of a micro-grouting foundation for a mountain photovoltaic fixed support, characterized in that the positioning device for the pre-embedded component of the micro-grouting foundation for a mountain photovoltaic fixed support as described in any one of claims 1 to 7 is used for positioning during the construction process, and the construction method specifically includes the following steps:

[0016] S1. Construct the pile holes for micro-grouting piles, complete the pile hole formation, hole bottom cleaning, and hole position re-measurement;

[0017] S2. The above positioning device is placed above the opening of the micro-grown pile hole, and the device is leveled and anchored by the support and leveling assembly.

[0018] S3. Adjust the borehole positioning components according to the measurement control lines and the total station verification results, so that the center of the through positioning sleeve coincides with the center of the micro-grouted pile hole.

[0019] S4. Insert the embedded part to be installed into the positioning sleeve, and insert the lower part of the embedded part into the pile hole of the micro-grouting pile. Adjust and lock the installation elevation and exposed length of the embedded part through the elevation limit component.

[0020] S5. After the installation elevation and exposed length of the embedded part are determined, the embedded part is coaxially clamped, centered and vertically adjusted by the radial fine-tuning clamping assembly.

[0021] S6. Concrete is poured and vibrated in layers. During the pouring process, the embedded parts are checked, and if the deviation exceeds the limit, it is corrected in time by the radial fine-tuning clamping component.

[0022] S7. After the concrete has initially set and the embedded parts have reached a stable condition, remove the positioning device and carry out subsequent curing and re-inspection.

[0023] The preferred technical solution of the present invention is as follows: In step S3, a dual-line verification method combining the control lines of the front row of piles and the control lines of the rear row of piles is adopted, and the center position of the positioning sleeve and the center position of the embedded part are verified by combining a total station to ensure that the center lines of the front and rear rows of piles in the same array are straight.

[0024] The preferred technical solution of this invention is as follows: In step S6, the concrete is poured in layers with a single layer thickness of 0.5m and 0.8m, and is vibrated with flexible high-frequency immersion vibrators with outer diameters of 5mm and 30mm. The vibrators are inserted and withdrawn in sections to the vicinity of the bottom of the hole. The slump of the concrete is retested before it is poured into the formwork. If the slump does not meet the preset control range, the approved compounding scheme is used for secondary remixing before pouring into the formwork. At least two measurement verifications are performed between steps S4 and S6. The first verification is performed after the first layer of concrete is poured into the formwork and initially vibrated, and the second verification is performed before the concrete at the top of the pile is poured, to ensure that the center deviation, elevation deviation and exposed length of the embedded parts meet the installation requirements.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) The present invention improves the leveling efficiency and stability of the device on different slopes and locally uneven ground by combining the frame body, adjustable legs and anchor feet;

[0027] (2) The present invention improves the accuracy of the center position and verticality control of the embedded parts by setting a through-type positioning sleeve and a circumferential fine adjustment clamping component to form a two-level control of initial guidance and fine correction; and combined with the positioning frame, it can ensure that the embedded parts will not have problems such as center offset, tilt and elevation drift when pouring concrete, which further ensures the installation stability of the photovoltaic bracket.

[0028] (3) The present invention can reduce the displacement of embedded parts caused by pouring and vibration by the coordinated use of elevation limit components and layered pouring verification process, and improve the consistency of batch construction; and can accurately set the exposed length of embedded parts to ensure the quality of subsequent construction. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a side view of the structure of the present invention;

[0031] Figure 3 for Figure 2 Enlarged diagram of section A

[0032] Figure 4 This is a schematic cross-sectional view of the positioning ring seat in this invention;

[0033] Figure 5 This is an enlarged cross-sectional view of the positioning ring seat in this invention;

[0034] Figure 6 for Figure 4 Enlarged structural diagram at point B;

[0035] Figure 7 This is a schematic diagram of the clamping plate structure in this invention;

[0036] Figure 8 This is a schematic diagram of the clamping plate extending out of the slot in this invention;

[0037] Figure 9 This is a schematic diagram of the clamping plate retraction slot in the present invention.

[0038] In the diagram: 1. Main frame; 2. Telescopic outrigger; 3. Universal joint; 4. Anchor foot; 5. Positioning ring seat; 6. Horizontal scale line; 7. Positioning sleeve; 8. Rectangular slot; 9. Knob; 10. Horizontal threaded rod; 11. Clamping plate; 12. Slide rail; 13. Connecting rod; 14. Threaded sleeve plate; 15. Support ring; 16. Adjusting ring; 17. Vertical threaded rod; 18. Knob; 19. Guide rod; 20. Limiting ring; 21. Scale; 22. Vertical scale line; 23. Fixing plate; 24. Embedded part; 25. Slider; 26. Limiting block. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0040] Example 1 provides a positioning device for the pre-embedded part of the micro-grouting foundation of a mountain photovoltaic fixed support, wherein the pre-embedded part 24 of the micro-grouting foundation is a pre-embedded steel pipe; as shown in Example 1. Figures 1 to 6As shown, it includes a frame body 1, a support and leveling assembly, a borehole positioning assembly, a radial fine-tuning clamping assembly, and an elevation limiting assembly. The frame body 1 is a cross-shaped main frame, which is used to span above the borehole of the micro-grown pile. The support and leveling assembly shown has four sets, which are respectively set below the four support ends of the cross-shaped main frame and are used to form stable support under complex slope conditions. Each set of support and leveling assembly includes a telescopic leg 2 and an anchor foot 4 set at the bottom of the telescopic leg 2. The telescopic leg 2 is connected to the cross-shaped main frame through a threaded adjustment pair and is equipped with a locking device. The orifice positioning assembly is located in the middle of the frame body 1. The orifice positioning assembly includes a positioning ring seat 5 fixed in the middle of the frame body 1 and a through-type positioning sleeve 7 located at the center of the positioning ring seat 5. An installation hole is provided in the cross-shaped intersection area of ​​the frame body 1. The positioning ring seat 5 is fixed in the installation hole, and its upper and lower end faces are flush with the upper and lower surfaces of the frame body 1. A horizontal scale line 6 is provided on the positioning ring seat 5. The positioning sleeve 7 is fixed inside the positioning ring seat 5 and is used for the embedded part 24 to pass through. Both the upper and lower ends of the positioning sleeve 7 extend beyond the positioning ring seat 5. Multiple sets of radial fine-tuning clamping assemblies are provided, arranged circumferentially along the positioning sleeve 7, and used for radial clamping and center correction of the embedded part. The radial fine-tuning clamping assemblies are located at the part of the positioning sleeve 7 that extends above the frame body 1. The elevation limiting assembly is located at the top of the positioning sleeve 7 and is coaxially arranged with the positioning sleeve 7, used to limit the installation elevation and exposed length of the embedded part.

[0041] In Example 1, as Figures 1 to 4 As shown, the telescopic outriggers 2 can be electrically operated or other length-adjustable structures. Each anchor foot 4 is connected to the corresponding telescopic outrigger 2 via a universal joint 3. The anchor foot 4 is provided with mounting holes for mates with ground anchors, expansion joints, and temporary pads. The frame body 1 is provided with a horizontal observation piece or a leveling baseline. On uneven mountain slopes, the height can be adjusted using multiple telescopic outriggers 2. Each telescopic outrigger 2 can be adjusted individually, and the telescopic outriggers are adjustablely connected to the anchor feet 4, allowing it to adapt to different ground surfaces.

[0042] In Example 1, as Figures 5 to 9As shown, multiple rectangular slots 8 are provided on the positioning sleeve 7. The positions of the rectangular slots 8 correspond to the installation positions of the radial fine-tuning clamping components, and the opening of each rectangular slot 8 faces downward toward the inner wall of the positioning sleeve 7. Multiple sets of radial fine-tuning clamping components are installed in the rectangular slots 8. Each set of radial fine-tuning clamping components includes a horizontal threaded rod 10, a clamping plate 11, and a threaded sleeve plate 14. The horizontal threaded rod is rotatably installed in the rectangular slot 8, with one end extending out of the outer wall of the positioning sleeve 7 and connected to a knob 9, and the other end provided with a limiting block 26. The threaded sleeve plate 14 is threaded onto the horizontal threaded rod 10, and the clamping plate 11 is positioned... At the opening end of the rectangular slot 8, a connecting rod 13 is connected to the threaded sleeve 14. Two connecting rods 13 are provided, arranged parallel to each other on both sides of the horizontal threaded rod 10. A fixing plate 23 is fixedly installed at a position away from the opening of the rectangular slot 8. The horizontal threaded rod 10 passes through the fixing plate 23 and is rotatably connected to the fixing plate 23 via a bearing. Two slide rails 12 parallel to the horizontal threaded rod 10 are symmetrically arranged on both sides of the inner cavity of the rectangular slot 8. Slider blocks 25 matching the slide rails 12 are symmetrically arranged on both sides of the threaded sleeve 14. The sliders 25 on both sides of the threaded sleeve 14 are slidably connected to the corresponding slide rails 12. Rotating the knob 9 can drive the horizontal threaded rod 10 to rotate. During the rotation of the horizontal threaded rod 10, the threaded sleeve 14 moves, thereby moving the clamping plate 11. The length of the connecting rod 13 matches the moving distance of the threaded sleeve 14 on the horizontal threaded rod 10, and the moving distance of the threaded sleeve 14 on the horizontal threaded rod 10 can keep the clamping plate 11 extending out of the rectangular slot 8 in the clamping state (e.g., Figure 8 As shown), it can be retracted into the rectangular slot 8 when not clamped (as shown). Figure 9 (As shown). The limiting block 26 prevents the threaded sleeve 14 from disengaging from the horizontal threaded rod 10. Each clamping plate 11 is a replaceable clamping structure with an anti-slip elastic pad on its inner arc surface. Each clamping plate 11 is configured with an arc surface that matches the outer diameter of the embedded part.

[0043] In Example 1, as Figure 5 and Figure 6As shown, the elevation limiting assembly includes a support ring 15 fixed to the top of the positioning sleeve 7 and an adjusting ring 16 arranged parallel above the support ring 15. The support ring 15 and the adjusting ring 16 are connected by a vertical threaded rod 17, and the lower end of the vertical threaded rod 17 is rotatably connected to the top surface of the support ring 15. The upper end extends out of the adjusting ring 16 and is connected to a knob 18. The adjusting ring 16 is threadedly connected to the vertical threaded rod 17, so that when the vertical threaded rod 17 is rotated, the adjusting ring 16 can be moved on the vertical threaded rod 17. To ensure the vertical movement of the adjusting ring 16, a guide rod 19 is provided through the adjusting ring 16. The guide rod 19 is located on the other side of the adjusting ring 16 and is arranged parallel to the vertical threaded rod 17. The lower end of the guide rod 19 is fixedly connected to the upper end face of the support ring 15. To prevent the adjusting ring 16 from detaching from the guide rod 19, a limiting ring 20 is provided at the top of the guide rod 19. A scale 21 is provided on one side of the adjusting ring 16. The scale 21 is arranged parallel to the vertical threaded rod 17 and has vertical scale lines 22.

[0044] The working process of the positioning device for the micro-grouting foundation pre-embedded part of the mountain photovoltaic fixed bracket in the embodiment is as follows: After completing the pile hole drilling, cleaning and hole position re-measurement before construction, the frame body 1 is erected at the pile hole opening. The slope adaptation and stable support are achieved through the surrounding support and leveling components: the extension length of the four telescopic legs 2 is adjusted by the threaded adjustment pair and locked by the locking component. With the cooperation of the horizontal observation piece and the leveling benchmark on the frame body 1, the device is adjusted to be horizontal. The bottom of each telescopic leg 2 is connected to the anchor foot 4 through the universal joint 3. The anchor foot 4 adapts to the slope and is fixed with the ground anchor, expansion component or temporary pad through the installation hole to avoid the device from slipping in the gravel soil layer of the slope and to provide a stable and rigid foundation for subsequent positioning.

[0045] After the device is leveled and anchored, the center of the borehole is aligned using the borehole positioning component: the positioning ring seat 5, which is fixed in the middle of the frame body 1, is adjusted to be completely aligned with the center of the pile hole by using the horizontal scale line 6 on it in conjunction with the double-line control line on site and the total station. This establishes a precise borehole positioning benchmark.

[0046] The embedded part is then inserted into the through-type positioning sleeve 7, and the sleeve completes the initial vertical guidance to avoid initial deviation caused by manual straightening during the initial placement of the embedded part. Then, the radial clamping component is used to achieve radial clamping, center correction and verticality correction of the embedded part: rotating the knob 9 drives the horizontal threaded rod 10 to rotate, which drives the threaded sleeve plate 14 to slide radially along the slide rail 12. Through the transmission of the connecting rod 13, the clamping plate 11 is pressed against the outer wall of the embedded part. The four-way synchronous adjustment can accurately correct the center deviation and verticality of the embedded part. The clamping plate 11 adopts a replaceable clamping structure and is equipped with an anti-slip elastic pad, which can be adapted to embedded parts with different outer diameters to ensure stable clamping and no damage.

[0047] After the embedded part is coaxially positioned, its installation elevation and exposed length are limited by the elevation limit component: the support ring 15 fixed with the positioning sleeve 7 serves as the base, and the knob 18 is rotated to drive the vertical threaded rod 17 to rotate, which drives the adjusting ring 16 to rise and fall smoothly along the guide rod 19. The upper limit ring 20 of the guide rod 19 limits the lifting stroke. With the help of the vertical scale line 22 on the scale 21 on one side of the adjusting ring 16, the elevation of the top surface of the embedded part and the exposed length are precisely adjusted and locked to meet the reserved adjustment requirements of subsequent construction.

[0048] Entering the concrete layered pouring and vibration stage, the overall rigid structure of the device can resist the lateral disturbances generated by pouring and vibration. During construction, at least two measurements are performed according to the process requirements. If the center, elevation or verticality deviation of the embedded part exceeds the limit, it can be corrected immediately by the radial fine-tuning clamping component. After the concrete has initially set and the embedded part has self-stabilizing ability, the entire rigid positioning device is removed. The subsequent concrete curing and re-inspection are completed, and finally, the high-precision and high-stability positioning and installation of the embedded part under mountainous and sloping conditions is achieved.

[0049] Example 2 provides a construction method for the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support. During the installation of the pre-embedded component, the positioning device of the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support provided in Example 1 is used for positioning construction. The specific steps are as follows:

[0050] S1. Complete the pile hole drilling, hole bottom cleaning, and hole position re-measurement;

[0051] S2. The positioning device from Example 1 is straddled above the opening of the pile hole, and the device is leveled and anchored by the supporting leveling component;

[0052] S3. Adjust the orifice positioning components according to the measurement control lines and the total station verification results, so that the center of the through positioning sleeve 7 coincides with the center of the pile hole. In this step, a double-line verification method combining the control lines of the front row of piles and the control lines of the rear row of piles is adopted, and the center position of the positioning sleeve and the center position of the embedded part are verified by the total station to ensure that the center lines of the front and rear rows of piles in the same array are straight.

[0053] S4. Insert the embedded part 24 to be installed into the positioning sleeve 7, and insert the lower part of the embedded part 24 into the pile hole of the micro-grouting pile. Adjust and lock the installation elevation and exposed length of the embedded part through the elevation limit component.

[0054] S5. After the installation elevation and exposed length of the embedded part are determined, the embedded part is coaxially clamped, centered and vertically adjusted by the radial fine-tuning clamping assembly.

[0055] S6. Concrete is poured and vibrated in layers. During the pouring process, the embedded parts are checked, and if the deviation exceeds the limit, it is corrected immediately by radial fine-tuning clamping components. In this step, the concrete is poured in layers with a single layer thickness of 0.5m and 0.8m, and vibrated with flexible high-frequency immersion vibrators with an outer diameter of 5mm and 30mm. The vibrators are inserted and withdrawn in sections to the vicinity of the bottom of the hole. The slump is retested before the concrete is put into the formwork. If the slump does not meet the preset control range, the approved compounding scheme is used for secondary remixing before being put into the formwork. At least two measurement checks are performed between steps S4 and S6. The first check is performed after the first layer of concrete is put into the formwork and initially vibrated, and the second check is performed before the concrete at the top of the pile is poured to ensure that the center deviation, elevation deviation and exposed length of the embedded parts meet the installation requirements.

[0056] S7. After the concrete has initially set and the embedded parts have reached a stable condition, remove the positioning device and carry out subsequent curing and re-inspection.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning device for pre-embedded components of a micro-grouting foundation for a mountain photovoltaic fixed support, characterized in that: The positioning device includes a frame body (1), a support and leveling assembly, an orifice positioning assembly, a radial fine-tuning clamping assembly, and an elevation limiting assembly; the support and leveling assembly is provided in multiple sets, which are distributed below the frame body (1). Each set of support and leveling assembly includes a telescopic leg (2) and an anchor foot (4) at the bottom of the telescopic leg (2); an installation hole matching the micro-grouted pile hole is provided in the middle of the frame body (1). The orifice positioning assembly includes a positioning ring seat (5) fixed in the installation hole and a through-type positioning sleeve (7) fixed in the positioning ring seat (5). The upper end of the positioning sleeve (7) is higher than the top surface of the frame body (1), and multiple sets of radial fine-tuning clamping assemblies are provided at the part of the positioning sleeve (7) that is higher than the frame body (1). The multiple sets of radial fine-tuning clamping assemblies are arranged around the circumference of the positioning sleeve (7). The main frame (1) spans above the opening of the micro-grouting pile hole, the positioning sleeve (7) is directly opposite the opening of the micro-grouting pile hole, the lower part of the embedded part (24) of the micro-grouting pile foundation is inserted into the micro-grouting pile hole through the positioning sleeve (7), and the upper part of the embedded part (24) is placed in the positioning sleeve (7), and is clamped and adjusted by multiple sets of radial fine-tuning clamping components; The elevation limiting component is set on the top of the positioning sleeve (7). The elevation limiting component includes a support ring (15) fixed on the top of the positioning sleeve (7) and an adjusting ring (16) arranged parallel above the support ring (15). The adjusting ring (16) is connected to the support ring (15) by a height adjustment mechanism, and a scale (21) is provided on the side of the adjusting ring (16).

2. The positioning device for the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support according to claim 1, characterized in that: The main body of the frame (1) is a cross-shaped frame. The orifice positioning component is fixedly installed at the center of the cross-shaped frame. The support and leveling component is provided in four groups, which are respectively set below the ends of the four cantilever arms of the cross-shaped frame. The telescopic support leg (2) of each support and leveling component is connected to the cross-shaped frame through a threaded adjustment pair and is provided with a locking component.

3. The positioning device for the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support according to claim 1 or 2, characterized in that: Multiple rectangular slots (8) are provided on each of the positioning sleeves (7). The opening positions of the rectangular slots (8) correspond to the installation positions of the radial fine-tuning clamping components. The opening of each rectangular slot (8) faces downward toward the inner wall of the positioning sleeve (7). Multiple sets of radial fine-tuning clamping components are installed in the rectangular slots (8). Each set of radial fine-tuning clamping components includes a horizontal threaded rod (10), a clamping plate (11), and a threaded sleeve plate (14). The horizontal threaded rod is rotatably installed in the rectangular slot (8). One end of the rod extends out of the outer wall of the positioning sleeve (7) and is connected to a knob (9). The other end is provided with a limit block (26). The threaded sleeve plate (14) is threaded onto the horizontal threaded rod. (10) The clamping plate (11) is located at the opening end of the rectangular slot (8) and is connected to the threaded sleeve plate (14) through the connecting rod (13); two slides (12) parallel to the horizontal threaded rod (10) are symmetrically arranged on both sides of the inner cavity of the rectangular slot (8), and sliders (25) matching the slides (12) are symmetrically arranged on both sides of the threaded sleeve plate (14). The sliders (25) on both sides of the threaded sleeve plate (14) are slidably connected to the corresponding slides (12); by rotating the knob (9) to drive the horizontal threaded rod (10) to rotate, the threaded sleeve plate (14) is driven to move along the guide (12), so that the clamping plate (11) is clamped or released.

4. The positioning device for the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support according to claim 1 or 2, characterized in that: The height adjustment mechanism of the elevation limit assembly includes a vertical threaded rod (17), the lower end of which is rotatably connected to the top surface of the support ring (15), the upper end of which extends out of the adjustment ring (16) and is connected to a knob (18), and the adjustment ring (16) is threadedly connected to the vertical threaded rod (17); a guide rod (19) is provided through the adjustment ring (16), the guide rod (19) is located on the other side of the adjustment ring (16) and is parallel to the vertical threaded rod (17), the lower end of the guide rod (19) is fixedly connected to the upper end surface of the support ring (15), and a limit ring (20) is provided at the top of the guide rod (19); the scale (21) is parallel to the vertical threaded rod (17), and a vertical scale line (22) is provided on the scale (21).

5. A positioning device for a micro-grouting foundation embedded part of a mountain photovoltaic fixed support according to claim 1 or 2, characterized in that: Each set of telescopic outriggers (2) supporting the leveling components is connected to the corresponding anchor foot (4) via a universal joint (3). The anchor foot (4) is provided with mounting holes for cooperating with ground anchors, expansion parts and temporary pads. The frame body (1) is provided with a horizontal observation piece or leveling baseline.

6. A positioning device for a micro-grouting foundation embedded part of a mountain photovoltaic fixed support according to claim 1 or 2, characterized in that: The top surface of the positioning ring seat (5) is flush with the top surface of the frame body (1). The upper and lower parts of the positioning sleeve (7) extend out of the positioning ring seat (5). A horizontal scale line (6) is provided on the positioning ring seat (5). Multiple sets of radial fine-tuning clamping components are evenly distributed at equal intervals in the area where the positioning sleeve (7) is higher than the positioning ring seat (5).

7. The positioning device for the pre-embedded component of the micro-grouting foundation of the mountain photovoltaic fixed support according to claim 3, characterized in that: Each of the clamping plates (11) is a replaceable clamping structure, and its inner arc surface is provided with an anti-slip elastic pad. Each of the clamping plates (11) is configured with an arc surface that matches the outer diameter of the embedded part (24). There are two connecting rods (13), which are arranged in parallel on both sides of the horizontal threaded rod (10). A fixing plate (23) is fixedly installed at a position away from the opening of the rectangular slot (8). The horizontal threaded rod (10) passes through the fixing plate (23) and is rotatably connected to the fixing plate (23) through a bearing.

8. A construction method for a micro-cast foundation embedded part for a mountain photovoltaic fixed support, characterized in that, During the construction of the embedded part, the positioning device for the micro-grouting foundation embedded part of the mountain photovoltaic fixed bracket as described in any one of claims 1 to 7 is used for positioning. The construction method specifically includes the following steps: S1. Construct the pile holes for micro-grouting piles, complete the pile hole formation, hole bottom cleaning, and hole position re-measurement; S2. The above positioning device is placed above the opening of the micro-grown pile hole, and the device is leveled and anchored by the support and leveling assembly. S3. Adjust the borehole positioning components according to the measurement control lines and the total station verification results, so that the center of the through positioning sleeve coincides with the center of the micro-grouted pile hole. S4. Insert the embedded part to be installed into the positioning sleeve, and insert the lower part of the embedded part into the pile hole of the micro-grouting pile. Adjust and lock the installation elevation and exposed length of the embedded part through the elevation limit component. S5. After the installation elevation and exposed length of the embedded part are determined, the embedded part is coaxially clamped, centered and vertically adjusted by the radial fine-tuning clamping assembly. S6. Concrete is poured and vibrated in layers. During the pouring process, the embedded parts are checked, and if the deviation exceeds the limit, it is corrected in time by the radial fine-tuning clamping component. S7. After the concrete has initially set and the embedded parts have reached a stable condition, remove the positioning device and carry out subsequent curing and re-inspection.

9. The construction method for a micro-cast foundation embedded part for a mountain photovoltaic fixed support according to claim 8, characterized in that: In step S3, a dual-line verification method combining the control lines of the front row of piles and the control lines of the rear row of piles is adopted. The center positions of the positioning sleeve and the embedded parts are verified by using a total station to ensure that the center lines of the front and rear rows of piles in the same array are straight.

10. The construction method of the micro-cast foundation pre-embedded part for a mountain photovoltaic fixed support according to claim 8, characterized in that: In step S6, the concrete is poured in layers with a single-layer thickness of 0.5m and 0.8m, and is vibrated with flexible high-frequency immersion vibrators with outer diameters of 5mm and 30mm. The vibrators are inserted and withdrawn in sections to reach near the bottom of the hole. The slump of the concrete is retested before it is poured into the formwork. If the slump does not meet the preset control range, it is remixed a second time using the approved compounding scheme before being poured into the formwork. At least two measurement verifications are performed between steps S4 and S6. The first verification is performed after the first layer of concrete is poured into the formwork and initially vibrated, and the second verification is performed before the concrete at the top of the pile is poured, to ensure that the center deviation, elevation deviation, and exposed length of the embedded parts meet the installation requirements.

Images