Pile hole lattice column positioning system and construction method

Abstract

This application relates to the field of building construction technology, and provides a positioning system and construction method for pile hole lattice columns. The system includes: a rotating casing, installed on an existing cast-in-place pile casing, with a first positioning element on the rotating casing for matching a pre-set positioning mark on the existing cast-in-place pile casing; a guide positioning frame, installed at the top of the rotating casing; at least two sets of limiting support frames, spaced apart along the height direction of the guide positioning frame; each limiting support frame includes limiting plates and limiting sleeves; the limiting sleeves are vertically installed and distributed on at least two limiting plates in each set of limiting support frames; and multiple extension rods, each extension rod vertically inserted into the limiting sleeves of at least two sets of limiting support frames, with the multiple extension rods connecting to the lattice column. This invention reduces the verticality deviation of the lattice column, improves the verticality control accuracy of the lattice column, and limits the torsion angle of the lattice column, preventing torsional deformation and tilting deformation of the lattice column.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a pile hole grid column positioning system and construction method. Background Technology

[0002] With social development and improved construction technology, in order to save and fully utilize land resources, foundation pits are trending towards ultra-deep pits, and the support method for these pits is mostly internal bracing. As the vertical load-bearing structure of the internal bracing system, the column pile is mainly composed of bored cast-in-place piles inserted into lattice columns. In addition, some projects use lattice-type tower crane foundations to expedite the commissioning of tower cranes, thereby addressing the issues of material turnover and transportation during earthwork excavation and foundation slab construction.

[0003] As the depth of the foundation pit increases, the requirements for the construction quality of the lattice columns become increasingly stringent. However, in actual construction, the verticality accuracy and directional angle of the lattice columns cannot be precisely controlled, leading to excessive verticality deviations and excessive torsion angles. Large verticality deviations and excessive torsion angles significantly reduce the load-bearing capacity of the lattice columns, affecting the safety of the foundation pit or the lattice tower crane foundation. Furthermore, it increases the construction difficulty of the steel scissor bracing for the lattice columns in the lattice tower crane foundation.

[0004] Therefore, there is a need to provide a positioning system and construction method for lattice columns in pile holes. This system should not only accurately control the verticality of the lattice columns and reduce their verticality deviation, but also prevent the lattice columns from twisting too much, thereby improving the positioning accuracy of the lattice columns. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and propose a positioning system and construction method for lattice columns in pile holes, which solves the problems of low positioning accuracy and difficulty in controlling verticality and torsion angle during the sinking construction of existing lattice columns in pile holes.

[0006] In a first aspect, the present invention provides a positioning system for a pile hole grid column, comprising:

[0007] A rotating casing is installed on an existing cast-in-place pile casing. The rotating casing is provided with a first positioning element, which is used to match the positioning mark preset on the existing cast-in-place pile casing to position the horizontal position of the rotating casing.

[0008] A guide positioning frame is disposed at the top of the rotating protective cylinder. The guide positioning frame is provided with a second positioning element, which is adapted to the first positioning element and / or the positioning mark to position the horizontal position of the guide positioning frame.

[0009] At least two sets of limiting support frames are distributed at intervals along the height direction of the guide positioning frame; each set of limiting support frames includes at least two limiting plate strips and at least two limiting sleeves; the at least two limiting plate strips are distributed longitudinally and transversely or parallel to each other in the horizontal plane; each limiting plate strip is movably engaged with the guide positioning frame in the horizontal direction; the limiting sleeves are vertically arranged and distributed on at least two limiting plate strips of each set of limiting support frames; and

[0010] Multiple extension rods, each of which is vertically inserted into the limiting sleeves of at least two sets of limiting support frames, and the multiple extension rods are connected to at least two side ends or at least two corners of the lattice column.

[0011] Furthermore, the second positioning element includes a plurality of adjustable legs distributed around the guide positioning frame, the adjustable legs being vertically arranged to adjust the height and level of the guide positioning frame.

[0012] Furthermore, the second positioning component also includes a tubular level, which is horizontally mounted on the guide positioning frame. The level of the guide positioning frame is determined by the tubular level, and the level of the guide positioning frame is adjusted using the adjustable legs, making it easy to adjust the level of the guide positioning frame.

[0013] Furthermore, there are four tube levels, evenly distributed around the guide positioning frame.

[0014] Furthermore, the first positioning element includes a plurality of positioning sleeves distributed around the rotating protective cylinder, the positioning sleeves being vertically arranged, and the adjustable support leg passing through the positioning sleeve.

[0015] By distributing positioning sleeves around the rotating casing, it is not only convenient for the positioning sleeves to be adapted to the pre-set positioning marks on the existing cast-in-place pile casing to achieve horizontal positioning of the rotating casing, but also convenient to cooperate with adjustable legs to limit the horizontal position of the guide positioning frame, thereby achieving horizontal positioning of the guide positioning frame and improving the positioning efficiency and accuracy of the horizontal position of the guide positioning frame.

[0016] Furthermore, the first positioning component includes multiple positioning steel plates distributed around the rotating casing. The rotating casing is coaxially fitted with the existing cast-in-place pile casing, and the multiple positioning steel plates are matched one-to-one with multiple positioning marks preset on the existing cast-in-place pile casing.

[0017] Furthermore, the positioning steel plate is horizontally arranged, the positioning sleeve is arranged above the positioning steel plate, the adjustable support leg is inserted into the positioning sleeve from top to bottom, and the lower end of the adjustable support leg is supported on the positioning steel plate.

[0018] By setting the positioning steel plate horizontally, the verticality of the adjustable support leg can be verified when the lower end of the adjustable support leg is supported on the horizontal positioning steel plate. This also facilitates the adjustment of the horizontality of the guide positioning frame in conjunction with the pipe level.

[0019] Furthermore, the limiting support frame also includes a locking clamp, which is connected to the limiting sleeve and is used to lock and fix the limiting sleeve, the limiting plate band, and the extension rod.

[0020] Furthermore, the locking clamp includes a clamping member and a locking member; the clamping member is connected to the limiting sleeve and clamps the limiting plate band; the locking member is connected to the limiting sleeve and locks the limiting sleeve and the extension rod.

[0021] Furthermore, the locking member is also connected to the clamping member to lock the clamping member and the limiting plate band.

[0022] Furthermore, the clamping member includes two clamping plates clamping on both sides of the limiting plate band and a cover plate connecting the two clamping plates. The cover plate is disposed at the upper end of the limiting plate band and is also fixedly connected to the limiting sleeve.

[0023] Furthermore, the locking component includes a first locking screw, and the side end of the limiting sleeve is provided with a sleeve threaded hole that is threadedly engaged with the first locking screw. The first locking screw is located below the limiting plate and is clamped with the cover plate at the upper and lower ends of the limiting plate. The first locking screw passes through two clamping plates in sequence and is threadedly engaged with the sleeve threaded hole to extend into the limiting sleeve and lock the extension rod.

[0024] Furthermore, the locking clamp also slides with the limiting plate along the length of the limiting plate. Because of this sliding engagement, the relative positions of the locking clamp and the limiting plate can be flexibly adjusted, thereby adjusting the horizontal position of the limiting sleeve to allow it to engage with the extension rod or to pre-position the extension rod.

[0025] Furthermore, the four sides of the guide positioning frame are respectively provided with horizontal strip grooves; the two ends of the limiting plate belt pass through the strip grooves at the two sides of the guide positioning frame respectively, and slide along the length of the strip grooves.

[0026] Furthermore, each set of limiting support frames includes two horizontally arranged limiting plate strips and two vertically arranged limiting plate strips; the two horizontally arranged limiting plate strips and the two vertically arranged limiting plate strips alternately enclose to form a rectangular frame, and the lattice column passes through the rectangular frame.

[0027] The rectangular frame can initially limit the placement of the lattice column within the pile hole, keeping the lattice column centered within the pile hole.

[0028] Furthermore, the end of the limiting plate extending out of the strip groove is provided with an anti-detachment part.

[0029] The anti-detachment part prevents the limiting plate from falling off the guide positioning frame, allowing the guide positioning frame and its limiting support frame to be disassembled and reassembled as a whole, facilitating reuse and improving construction efficiency.

[0030] Furthermore, the anti-detachment part is provided with a plate and strip locking member, which is used to lock the limiting plate and strip on the guide positioning frame.

[0031] Furthermore, the extension rod is detachably connected to the lattice column. By detachably connecting the extension rod to the lattice column, it is convenient to quickly separate the extension rod from the lattice column after the concrete is poured and cured in the pile hole. This facilitates the reuse of components such as the extension rod, guide positioning frame, and rotating casing, avoiding material waste and reducing costs.

[0032] Furthermore, the lower end of the extension rod is threadedly connected to a column joint, which is fixed to the lattice column.

[0033] Furthermore, the column connection components include threaded pipe connection components or threaded rod connection components that are vertically welded to the lattice column; when the lower end of the extension rod is provided with a threaded rod portion, the threaded rod portion is threadedly engaged with the threaded pipe connection component; when the lower end of the extension rod is provided with a threaded pipe portion, the threaded pipe portion is threadedly engaged with the threaded rod connection component. Since the length of the extension rod, the height at which the column connection component is fixed on the lattice column, and the engagement depth between the extension rod and the column connection component are known, the depth of the lower end of the extension rod in the pile hole can be obtained by measuring the length of the upper end of the extension rod extending above the rotating casing. Therefore, the lowering elevation of the lattice column connected to the extension rod can be determined outside the pile hole.

[0034] Secondly, the present invention also proposes a construction method for pile hole lattice columns, utilizing the aforementioned pile hole lattice column positioning system, comprising the following steps:

[0035] The rotating casing is installed on the existing cast-in-place pile casing, so that the first positioning component on the rotating casing matches the preset positioning mark on the existing cast-in-place pile casing, thus completing the horizontal positioning of the rotating casing.

[0036] The guide positioning frame is set at the top of the rotating protective cylinder. The second positioning component on the guide positioning frame is adapted to the first positioning component and / or the positioning mark to complete the horizontal positioning of the guide positioning frame.

[0037] The steel cage and lattice column are passed sequentially through the guide positioning frame, the rotating casing and the existing cast-in-place pile casing, and then lowered into the pile hole;

[0038] Adjust the limiting plate belt of the limiting support frame in the horizontal direction to a suitable position;

[0039] Pass the extension rod through the limiting sleeve on the limiting plate and connect the extension rod to the lattice column; after lowering the lattice column to the elevation position, lock the extension rod and the limiting sleeve to fix it.

[0040] Clean the pile hole and pour concrete into it.

[0041] The beneficial effects of this invention include: by setting the rotating casing on the existing cast-in-place pile casing and using the first positioning component to match the positioning mark preset on the existing cast-in-place pile casing, the horizontal position of the rotating casing is achieved. Based on this, the guide positioning frame is installed at the top of the rotating casing, and in conjunction with the positioning of the second positioning component, the horizontality of the guide positioning frame is ensured. By vertically inserting the extension rod through the limiting sleeves of at least two sets of limiting support frames and connecting it to at least two side ends or at least two corners of the lattice column, the vertically set limiting sleeves ensure the verticality of the extension rod, thereby ensuring the verticality of the lattice column. This reduces the verticality deviation of the lattice column and improves the accuracy of verticality control. Simultaneously, the limiting plate, which moves horizontally in conjunction with the guide positioning frame, can pre-position the lattice column within the pile hole. Furthermore, by setting at least two sets of limiting support frames spaced along the height direction on the guide positioning frame, and vertically inserting the extension rod into the limiting sleeves of these frames, tilting of the extension rod can be effectively prevented, effectively limiting the torsional angle of the lattice column and effectively preventing torsional and tilting deformation. Moreover, the extension rod allows for good control of the lattice column's settlement elevation. Attached Figure Description

[0042] Figure 1 This is a front view structural schematic diagram of one embodiment of the pile hole grid column positioning system of the present invention.

[0043] Figure 2 for Figure 1 A schematic diagram of the vertical cross-sectional structure.

[0044] Figure 3 for Figure 1 A top-view structural diagram.

[0045] Figure 4 for Figure 1 A three-dimensional structural diagram of the central guide positioning frame.

[0046] Figure 5 for Figure 1 Schematic diagram of the cross-section of the structure (1-1).

[0047] Figure 6 for Figure 1 Schematic diagram of the cross-section of the structure in section 2-2.

[0048] Figure 7 for Figure 1 A three-dimensional structural diagram of a limiting plate belt.

[0049] Figure 8 for Figure 1 A schematic diagram of the locking clamp of the pile hole grid column positioning system.

[0050] Figure 9 for Figure 8 A top-view structural diagram.

[0051] Figure 10 for Figure 8 A schematic diagram of the locking clamp, locking and fixing limit plate and extension rod.

[0052] Figure 11 for Figure 1 A schematic diagram of the extension rod and the threaded connection at the lower end of the column joint of the pile hole grid column positioning system.

[0053] Figure 12 This is a front view schematic diagram of another embodiment of the pile hole grid column positioning system of the present invention.

[0054] Figure 13 for Figure 12 A top-view structural diagram.

[0055] Figure 14 for Figure 13 A schematic diagram of the main structure of the plate and strip locking component at point A.

[0056] Figure 15 for Figure 14 Side view.

[0057] Figure 16 for Figure 12 A schematic diagram of the structure of the extension rod and the threaded joint at its lower end.

[0058] Figure 17 This is a top view schematic diagram of another embodiment of the pile hole grid column positioning system of the present invention.

[0059] Figure 18 This is a schematic flowchart of the construction method for the pile hole grid column of the present invention.

[0060] In the diagram, 1-rotating casing; 2-positioning sleeve; 3-positioning steel plate; 4-adjustable support leg; 5-guide positioning frame; 6-pipe level; 7-limiting plate band; 8-limiting sleeve; 9-extension rod; 10-column joint; 11-plate band locking screw; 12-existing cast-in-place pile casing; 13-lattice column; 14-reinforcing cage; 15-arc-shaped fixing plate; 16-sleeve locking screw; 17-strip groove; 18-clamping plate; 19-cover plate; 20-first locking screw; 21-fixing plate locking screw. Detailed Implementation

[0061] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] Example 1

[0063] like Figure 1 , 2 As shown, the pile hole grid column positioning system proposed in this invention includes a rotating casing 1, a guide positioning frame 5, two sets of limiting support frames, and four extension rods 9.

[0064] A rotating casing 1 is installed on the existing cast-in-place pile casing 12. The rotating casing 1 is equipped with a first positioning element, which is used to match the pre-set positioning marks on the existing cast-in-place pile casing 12 to position the rotating casing 1 horizontally. The rotating casing 1 can be a cylindrical structure. Before installing the rotating casing 1, the position of the first positioning element fixed on the rotating casing 1 is determined, that is, the relative position of the first positioning element and the rotating casing 1 is determined. The pile hole size is known. Based on the design drawings and the intended installation position of the lattice column 13 within the pile hole, the position of the positioning marks on the existing cast-in-place pile casing 12 is determined. Based on the position of the positioning marks, the position of the first positioning element on the existing cast-in-place pile casing 12 is determined, thus determining the position of the rotating casing 1 on the existing cast-in-place pile casing 12.

[0065] The guide positioning frame 5 is located at the top of the rotating protective cylinder 1. A second positioning element is provided on the guide positioning frame 5 to mate with the first positioning element and / or a positioning mark, thereby positioning the guide positioning frame 5 horizontally. The second positioning element can cooperate with the first positioning element to determine the horizontal position of the guide positioning frame 5. Alternatively, the second positioning element can directly cooperate with a preset positioning mark to determine the horizontal position of the guide positioning frame 5.

[0066] like Figure 2-4 As shown, the two sets of limiting support frames are distributed at intervals along the height direction of the guide positioning frame 5; each set of limiting support frames includes four limiting plate strips 7 and four limiting sleeves 8; the four limiting plate strips 7 are distributed longitudinally and transversely in the horizontal plane; each limiting plate strip 7 is movably engaged with the guide positioning frame 5 in the horizontal direction; the limiting sleeves 8 are vertically set and distributed on each limiting plate strip 7 of each set of limiting support frames.

[0067] like Figure 3 The diagram shows four limiting plates 7 and four limiting sleeves 8 of a set of limiting support frames. Each set of limiting support frames includes two transversely arranged limiting plates 7 and two longitudinally arranged limiting plates 7; the two transversely arranged limiting plates 7 and the two longitudinally arranged limiting plates 7 alternately enclose to form a rectangular frame, through which the lattice column 13 passes. The position of the rectangular frame preliminarily determines the position of the lattice column 13. Figure 3 In this design, four alternating longitudinal and transverse limiting plates 7 form four intersection points, which can be understood as the four vertices of a rectangle. Four limiting sleeves 8 are distributed at the four vertices of the rectangle and are located inside the rectangle. In some embodiments, there may be only three limiting sleeves 8, distributed at any three of the four vertices of the rectangle.

[0068] like Figure 1-3 As shown, four extension rods 9 are vertically inserted into the four limiting sleeves 8 of the two sets of limiting support frames. Each extension rod 9 passes sequentially from top to bottom through two limiting sleeves 8 on the same vertical axis of the two sets of limiting support frames. These two limiting sleeves 8 on the same vertical axis restrict the tilting of the extension rod 9. The four extension rods 9 are respectively connected to the four side ends or four corners of the lattice column 13. Since the tilting of the extension rods 9 is restricted, the torsion of the lattice column 13 is also restricted. In some embodiments, the two limiting sleeves 8 on the same vertical axis of the two sets of limiting support frames can be connected along their axis to form a longer limiting sleeve 8, which can also serve to restrict the tilting of the extension rod 9.

[0069] like Figure 4 As shown, the guide positioning frame 5 is a frame structure with diagonal braces around it to improve the strength of the frame structure. In addition, four protruding diagonal braces are provided at the bottom of the guide positioning frame 5 to provide a support surface for the second positioning component.

[0070] Combination Figure 1 , Figure 5 , Figure 6 As shown, the second positioning component includes four adjustable legs 4 distributed around the guide positioning frame 5. The adjustable legs 4 are vertically positioned for adjusting the height and level of the guide positioning frame 5. The second positioning component also includes four tubular levels 6, horizontally positioned on the guide positioning frame 5. These levels are evenly distributed around the guide positioning frame 5. Figure 3 As shown, four tube levels 6 are distributed at four different positions on the top of the guide positioning frame 5. The height of the guide positioning frame 5 at the position of the adjustable leg 4 is adjusted by adjusting its extension height. Through the coordination of multiple adjustable legs 4, the levelness of the guide positioning frame 5 is adjusted. The adjustable legs 4 utilize existing equipment.

[0071] Combined with appendix Figure 1 Appendix Figure 6 As shown, the first positioning component includes four positioning sleeves 2 distributed around the rotating casing 1. The positioning sleeves 2 are vertically arranged, and the adjustable support legs 4 are inserted through the positioning sleeves 2. By distributing the positioning sleeves 2 around the rotating casing 1, it is not only convenient for the positioning sleeves 2 to be adapted to the pre-set positioning marks on the existing cast-in-place pile casing 12 to achieve the horizontal positioning of the rotating casing 1, but also convenient for cooperation with the adjustable support legs 4 to limit the horizontal position of the guide positioning frame 5, thereby achieving the horizontal positioning of the guide positioning frame 5 and improving the positioning efficiency and accuracy of the horizontal position of the guide positioning frame 5.

[0072] The first positioning component also includes multiple positioning steel plates 3 distributed around the rotating casing 1. The rotating casing 1 is coaxially fitted with the existing cast-in-place pile casing 12, and the four positioning steel plates 3 correspond one-to-one with the four positioning marks preset on the existing cast-in-place pile casing 12. The positioning steel plates 3 are horizontally set and welded to the outer wall of the rotating casing 1. The bottom end of the positioning steel plate 3 is at the same horizontal plane as the bottom end of the rotating casing 1. The positioning sleeve 2 is set above the positioning steel plate 3 and can maintain a distance in the height direction to facilitate the adjustment of the adjustable support leg 4. The adjustable support leg 4 is inserted from top to bottom in the positioning sleeve 2, and the lower end of the adjustable support leg 4 is supported on the positioning steel plate 3.

[0073] The positioning steel plate 3 can be a rectangular steel plate or a ring-shaped steel plate. Alternatively, to improve positioning accuracy, the positioning steel plate 3 may have a positioning hole at its center. This positioning hole is aligned with the dot-shaped positioning marks on the existing cast-in-place pile casing 12 to achieve the positioning of the rotating casing 1. The positioning hole of the positioning steel plate 3 is located on the axis of the positioning sleeve 2 above the positioning steel plate 3.

[0074] like Figure 6 As shown, the first positioning component also includes a sleeve locking screw 16. The side end of the positioning sleeve 2 is provided with a radially arranged threaded hole. The sleeve locking screw 16 engages with the threaded hole. Tightening the sleeve locking screw 16 causes its end to extend into the positioning sleeve 2, pressing against the side wall of the adjustable support leg 4 to lock and fix the adjustable support leg 4 and the positioning sleeve 2. This achieves the fixation of the rotating protective sleeve 1 and the guide positioning frame 5.

[0075] Combined with appendix Figure 4 , Figure 7 As shown, the four sides of the guide positioning frame 5 are respectively provided with horizontal strip grooves 17; the length of the strip grooves 17 is greater than the minimum width of the lattice column 13 and the sum of the widths of the two limiting plate bands 7. The two ends of the limiting plate bands 7 pass through the strip grooves 17 at the two sides of the guide positioning frame 5 respectively, and slide along the length direction of the strip grooves 17.

[0076] like Figure 4As shown, the four strip grooves 17 include two transversely arranged strip grooves 17 and two longitudinally arranged strip grooves 17. Each set of limiting support frames includes two transversely arranged limiting plate strips 7 and two longitudinally arranged limiting plate strips 7; the two ends of the two transversely arranged limiting plate strips 7 pass through the two longitudinally arranged strip grooves 17 respectively, and the two ends of the two longitudinally arranged limiting plate strips 7 pass through the two transversely arranged strip grooves 17 respectively.

[0077] like Figure 7 As shown, the end of the protruding strip groove 17 of the limiting plate band 7 is provided with an anti-detachment part. The anti-detachment part can prevent the limiting plate band 7 from falling off the guide positioning frame 5, so that the guide positioning frame 5 and the limiting support frame on it can be disassembled and assembled as a whole, which is convenient for reuse and improves construction efficiency.

[0078] The anti-detachment part can be a curved part provided at the end of the limiting plate band 7. In this embodiment, the limiting plate band 7 can be a steel strip with a rectangular cross-section, and the two ends of the steel strip are bent to form the anti-detachment part. Of course, the bending of the steel strip is done after the steel strip passes through the two strip grooves 17.

[0079] The anti-detachment part is equipped with a plate and strip locking device, which is used to lock the limiting plate and strip 7 on the guide positioning frame 5. Figure 7 As shown, the plate and strip locking component includes a plate and strip locking screw 11. The anti-disengagement part of the limiting plate and strip 7 is provided with a threaded hole. The plate and strip locking screw 11 is threadedly engaged with the threaded hole, and its end abuts against the side wall of the guide positioning frame 5, thereby locking the limiting plate and strip 7 onto the guide positioning frame 5. Conversely, by rotating the plate and strip locking screw 11 in the opposite direction, its end is separated from the guide positioning frame 5, releasing the locking and fixing of the limiting plate and strip 7, and the limiting plate and strip 7 can continue to move along the length direction of the strip groove 17.

[0080] like Figure 8-10 As shown, the limiting support frame also includes a locking clamp, which is connected to the limiting sleeve 8. The locking clamp is used to lock and fix the limiting sleeve 8, the limiting plate belt 7, and the extension rod 9.

[0081] The locking clamp includes a clamping component and a locking component; the clamping component is connected to the limiting sleeve 8 and clamps the limiting plate band 7; the locking component is connected to the limiting sleeve 8 and locks the limiting sleeve 8 and the extension rod 9.

[0082] The locking element is also connected to the clamping element, locking the clamping element and the limiting plate 7.

[0083] In this embodiment, the clamping component includes two clamping plates 18 clamping both sides of the limiting plate band 7 and a cover plate 19 connecting the two clamping plates 18. The cover plate 19 is disposed at the upper end of the limiting plate band 7 and is also fixedly connected to the limiting sleeve 8. The surfaces of the clamping plates 18 and the cover plate 19 are perpendicular. The cover plate 19 is horizontally arranged, and the clamping plates 18 are vertically arranged.

[0084] The locking component includes a first locking screw 20. The side end of the limiting sleeve 8 is provided with a sleeve thread hole that is threaded to the first locking screw 20. The first locking screw 20 is horizontally positioned below the limiting plate band 7 and is clamped to the upper and lower ends of the limiting plate band 7 with the cover plate 19. The first locking screw 20 passes through two clamping plates 18 in sequence and is threaded to the sleeve thread hole to extend into the limiting sleeve 8 to lock the extension rod 9.

[0085] In this embodiment, as Figure 9 As shown, each limiting sleeve 8 is equipped with two locking clamps, and the first locking screws 20 of the two locking clamps form a 90-degree angle with each other in the horizontal plane. The central axis of the first locking screws 20 of the two locking clamps passes through the central axis of the limiting sleeve 8.

[0086] The locking clamp can also slide and engage with the limiting plate 7 along the length of the limiting plate 7.

[0087] The extension rod 9 is detachably connected to the lattice column 13. The lower end of the extension rod 9 is threadedly connected to a column connector 10, which is fixed to the lattice column 13.

[0088] The column connecting member 10 includes a threaded pipe connecting member or a threaded rod connecting member that is vertically welded to the lattice column 13. When the lower end of the extension rod 9 is provided with a threaded rod portion, the threaded rod portion is threadedly engaged with the threaded pipe connecting member; when the lower end of the extension rod 9 is provided with a threaded pipe portion, the threaded pipe portion is threadedly engaged with the threaded rod connecting member. Since the length of the extension rod 9, the height at which the column connecting member 10 is fixed on the lattice column 13, and the engagement depth between the extension rod 9 and the column connecting member 10 are known, the depth of the lower end of the extension rod 9 in the pile hole can be obtained by measuring the length of the upper end of the extension rod 9 extending above the rotating casing 1. Thus, the lowering elevation of the lattice column 13 connected to the extension rod 9 can be determined outside the pile hole.

[0089] This implementation example Figure 11 As shown, the column mating member 10 includes a threaded pipe mating member. (See attached diagram.) Figure 2 As shown, the threaded pipe fittings are vertically welded to the four corners of the lattice column 13. The lower end of the extension rod 9 is provided with a threaded part, which is screwed into the threaded pipe fitting to connect the extension rod 9 to the lattice column 13.

[0090] Example 2

[0091] like Figure 12 , 13As shown, the positioning system for the pile hole lattice column 13 proposed in this embodiment is largely the same in structure as that in Embodiment 1, except that the guide positioning frame 5 in this embodiment adopts a circular frame or a cylindrical structure. The guide positioning frame 5 includes an upper ring, a lower ring, and a support frame connecting the upper and lower rings. The guide positioning frame 5 in Embodiment 1 has four protruding diagonal braces at its bottom end, while in this embodiment, the protruding diagonal braces are omitted. The adjustable support leg 4 acts directly on the lower ring.

[0092] In addition, in this embodiment, the strip groove 17 is formed at the side ends of the upper and lower rings. The tubular level 6 is evenly distributed at the top of the upper ring.

[0093] like Figure 14 , 15 As shown, the locking components of the limiting plate band 7 located at both ends outside the guide positioning frame 5 include an arc-shaped fixing piece 15 and a fixing piece locking screw 21. The arc-shaped fixing piece 15 fits against the arc-shaped outer wall of the upper or lower ring of the guide positioning frame 5. The limiting plate band 7 passes through the arc-shaped fixing piece 15. The fixing piece locking screw 21 is threadedly engaged with the threaded hole provided on the arc-shaped positioning piece and abuts against the guide positioning frame 5, thereby realizing the locking and fixing of the limiting plate band 7 relative to the guide positioning frame 5.

[0094] like Figure 16 As shown, the column connector 10 includes threaded rod connectors, which are vertically welded to the four corners of the lattice column 13. The lower end of the extension rod 9 is provided with a threaded tube. When the extension rod 9 is lowered, the threaded tube is fitted over the threaded rod connector, and the extension rod 9 is tightened, causing the threaded rod connector to be screwed into the threaded tube until it cannot be screwed in any further. This achieves the connection between the extension rod 9 and the lattice column 13. Since the length of the extension rod 9, the height at which the column connector 10 is fixed on the lattice column 13, and the mating depth between the extension rod 9 and the column connector 10 are known, the depth of the lower end of the extension rod 9 within the pile hole can be determined by the length of the extension rod 9 extending beyond the rotating casing 1. Therefore, the lowering elevation of the lattice column 13 connected to the extension rod 9 can be determined outside the pile hole.

[0095] Example 3

[0096] like Figure 17As shown, the positioning system for the pile hole lattice column 13 proposed in this embodiment is roughly the same as that in Embodiment 1. The difference is that a limiting sleeve 8 is fixed to the middle of each limiting plate band 7 by a locking clamp. Compared with Embodiment 1, which uses two locking clamps to fix a limiting sleeve 8 at the intersection of two limiting plate bands 7, this embodiment can reduce the number of locking clamps used, simplify the installation process of the limiting sleeve 8, and make the position adjustment of the limiting sleeve 8 on the limiting plate band 7 more flexible. In addition, the construction requirements for the column connecting piece 10 welded to the lattice column 13 are also reduced. It is only necessary to keep the column connecting piece 10 vertically welded to the side wall of the lattice column 13. After the extension rod 9 passes through the limiting sleeve 8, if the extension rod 9 and the column connecting piece 10 are not aligned, the limiting sleeve 8 on the limiting plate band 7 can be slid.

[0097] like Figure 18 As shown, based on the same inventive concept, this invention also proposes a construction method for a pile hole lattice column 13. This construction method utilizes the aforementioned pile hole lattice column 13 positioning system. Taking the system of Embodiment 1 as an example, the method includes the following steps:

[0098] When making the lattice column 13, the four column connectors 10 are welded to the four corners of the lattice column 13 respectively.

[0099] Before drilling, measurements and positioning are performed to embed the cast-in-place pile casing in a fixed position, forming the existing cast-in-place pile casing 12. Drilling is carried out using a drilling rig, and the hole is cleaned after drilling.

[0100] The rotating casing 1 is fitted onto the existing cast-in-place pile casing 12, so that the position of the positioning steel plate 3 on the rotating casing 1 corresponds one-to-one with the position of the preset positioning mark on the existing cast-in-place pile casing 12, thus completing the horizontal positioning of the rotating casing 1. The rotating casing 1 is then fixed.

[0101] A guide positioning frame 5 with adjustable support legs 4 pre-fixed is set at the top of the rotating casing 1. The adjustable support legs 4 are passed through the positioning sleeve 2 welded to the outside of the rotating casing 1, and the bottom end of the adjustable support legs 4 is placed on the positioning steel plate 3. The height of the adjustable support legs 4 is adjusted, and the height and level of the guide positioning frame 5 are adjusted in conjunction with the pipe level 6. The horizontal position of the guide positioning frame 5 is thus completed.

[0102] The reinforcing cage 14 and the lattice column 13 are sequentially passed through the guide positioning frame 5, the rotating casing 1, and the existing cast-in-place pile casing 12, and lowered into the pile hole. The lattice column 13 is lowered to a stop below the lowest limiting support frame of the guide positioning frame 5.

[0103] Adjust the limiting plate band 7 of the limiting support frame to a suitable position in the horizontal direction. Precisely position the lattice column 13 in the middle of the limiting support frame, that is, precisely position the lattice column 13 within the rectangular frame formed by the four limiting plate bands 7.

[0104] Install the limiting sleeve 8 at the junction of the limiting plate belt 7 of the two sets of limiting support frames.

[0105] Pass the extension rod 9 through the limiting sleeve 8 on the limiting plate 7, and connect the extension rod 9 to the column joint 10 of the lattice column 13; after lowering the lattice column 13 to the elevation position, lock the extension rod 9 and the limiting sleeve 8 to fix them.

[0106] The pile hole was cleaned a second time, and concrete was poured into the pile hole.

[0107] After the concrete has initially set, the extension rod 9 is unscrewed from the column joint 10 and reused to carry out the construction of the next lattice column 13.

[0108] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pile hole lattice column positioning system, characterized in that, include: A rotating casing is installed on an existing cast-in-place pile casing. The rotating casing is provided with a first positioning element, which is used to match the positioning mark preset on the existing cast-in-place pile casing to position the horizontal position of the rotating casing. A guide positioning frame is disposed at the top of the rotating protective cylinder. The guide positioning frame is provided with a second positioning element, which is adapted to the first positioning element and / or the positioning mark to position the horizontal position of the guide positioning frame. At least two sets of limiting support frames are distributed at intervals along the height direction of the guide positioning frame; each set of limiting support frames includes at least two limiting plate strips and at least two limiting sleeves; the at least two limiting plate strips are distributed longitudinally and transversely or parallel to each other in the horizontal plane; each limiting plate strip is movably engaged with the guide positioning frame in the horizontal direction; the limiting sleeves are vertically arranged and distributed on at least two limiting plate strips of each set of limiting support frames; as well as Multiple extension rods, each extension rod is vertically inserted into the limiting sleeve of at least two sets of limiting support frames, and the multiple extension rods are connected to at least two side ends or at least two corners of the lattice column; The limiting support frame also includes a locking clamp, which is connected to the limiting sleeve and is used to lock and fix the limiting sleeve, the limiting plate band and the extension rod; The locking clamp includes a clamping member and a locking member; the clamping member is connected to the limiting sleeve and clamps the limiting plate band; the locking member is connected to the limiting sleeve and locks the limiting sleeve and the extension rod. The clamping component includes two clamping plates clamping on both sides of the limiting plate band and a cover plate connecting the two clamping plates. The cover plate is located at the upper end of the limiting plate band and is also fixedly connected to the limiting sleeve. The surfaces of the clamping plates and the cover plate are perpendicular to each other. The cover plate is set horizontally and the clamping plates are set vertically. The locking component includes a first locking screw. The side end of the limiting sleeve is provided with a sleeve threaded hole that is threaded with the first locking screw. The first locking screw is horizontally positioned below the limiting plate and is clamped with the cover plate at the upper and lower ends of the limiting plate. The first locking screw passes through the two clamping plates in sequence and is threaded with the sleeve threaded hole to extend into the limiting sleeve to lock the extension rod.

2. A pile hole lattice column positioning system according to claim 1, wherein, The second positioning component includes multiple adjustable legs distributed around the guide positioning frame. The adjustable legs are vertically arranged to adjust the height and level of the guide positioning frame.

3. A pile hole lattice column positioning system according to claim 2, wherein, The first positioning element includes a plurality of positioning sleeves distributed around the rotating protective cylinder, the positioning sleeves being vertically arranged, and the adjustable support leg passing through the positioning sleeve.

4. The pile hole lattice column positioning system according to claim 1, wherein, The first positioning component includes multiple positioning steel plates distributed around the rotating casing. The rotating casing is coaxially fitted with the existing cast-in-place pile casing, and the multiple positioning steel plates correspond one-to-one with multiple positioning marks preset on the existing cast-in-place pile casing.

5. The pile hole lattice column positioning system according to claim 1, wherein, The locking clamp also slides with the limiting plate along the length of the limiting plate.

6. The pile hole lattice column positioning system according to claim 1, characterized in that, The four sides of the guide positioning frame are respectively provided with horizontal strip grooves; the two ends of the limiting plate belt pass through the strip grooves at the two sides of the guide positioning frame respectively, and slide along the length of the strip grooves.

7. The pile hole lattice column positioning system according to claim 1, wherein, The extension rod is detachably connected to the lattice column.

8. A method for constructing a pile-hole lattice column, utilizing the pile-hole lattice column positioning system as described in any one of claims 1-7, characterized in that, Includes the following steps: The rotating casing is installed on the existing cast-in-place pile casing, so that the first positioning component on the rotating casing matches the preset positioning mark on the existing cast-in-place pile casing, thus completing the horizontal positioning of the rotating casing. The guide positioning frame is set at the top of the rotating protective cylinder. The second positioning component on the guide positioning frame is adapted to the first positioning component and / or the positioning mark to complete the horizontal positioning of the guide positioning frame. The steel cage and lattice column are passed sequentially through the guide positioning frame, the rotating casing and the existing cast-in-place pile casing, and then lowered into the pile hole; Adjust the limiting plate belt of the limiting support frame in the horizontal direction to a suitable position; Pass the extension rod through the limiting sleeve on the limiting plate and connect the extension rod to the lattice column; after lowering the lattice column to the elevation position, lock the extension rod and the limiting sleeve to fix it. Clean the pile hole and pour concrete into it.

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