A positioning assembly and device for the lower hole of a steel cage for anti-sliding square piles

Abstract

This application discloses a positioning component and device for lowering the reinforcing cage of an anti-slip square pile, relating to the field of anti-slip square pile construction technology. The positioning component includes a horizontally positioned support shaft, on which a positioning tube is sleeved. The positioning tube is rotatably connected to the support shaft via a bearing. A fixed seat connected to the support shaft is spaced apart on one side of the positioning tube. The fixed seat is detachably mounted on the top of a steel casing, allowing the positioning tube to be arranged inside the steel casing and parallel to its wall. By fixing the positioning component to the top of the steel casing, this application ensures that the positioning tube remains in rolling contact with the outer surface of the reinforcing cage during lowering, achieving positioning and guidance of the cage. This ensures that the center of gravity of the reinforcing cage is always confined to near the centerline of the steel casing, avoiding the depth accumulation eccentricity caused by traditional point-based correction. Simultaneously, it allows the reinforcing cage to be lowered continuously in one go without repeated lifting, ensuring the overall rigidity of the cage.

Description

Technical Field

[0001] This application relates to the field of anti-slide square pile construction technology, specifically to a positioning component and positioning device for the lower hole of the steel cage of an anti-slide square pile. Background Technology

[0002] Anti-slide piles are retaining structures that are cantilevered or anchored and embedded in stable strata below the sliding surface, relying on the bending stiffness of the pile body to resist landslide thrust. They are widely used in slope, foundation pit, and reservoir bank slope management. Construction of anti-slide piles typically involves first hoisting the reinforcing cage as a whole into a steel casing, and then pouring concrete to form a rectangular or square cross-section pile. Standards require that the concrete cover around the reinforcing cage must be of uniform thickness and meet design requirements to ensure the pile's durability and anti-slide performance.

[0003] Currently, the length of the reinforcing cage in ultra-long anti-slide piles is generally between 20 m and 60 m, with some projects exceeding 60 m. During the lowering process, the center of gravity of the reinforcing cage is easily deviated from the center of the borehole due to its own weight and the swinging of the slings, causing point contact or overall tilting between the cage and the inner wall of the steel casing. As the lowering depth increases, these deviations accumulate section by section, eventually forming a significant eccentricity at the pile bottom. After concrete is poured, the thickness of the concrete cover at the eccentric location will be significantly less than the design value, and in some areas, the main reinforcement may even be exposed, directly weakening the pile's durability and anti-slide performance.

[0004] To address the aforementioned issues, during the lowering of the reinforcing cage into the borehole, workers commonly apply lateral force to the top of the cage using pry bars or hand-operated hoists at the borehole opening, employing multiple small lifts and drops to fine-tune its position. However, this adjustment method has the following drawbacks: 1. Due to the considerable length of the reinforcing cage, the lateral adjustment force applied to its top is difficult to effectively transmit to the middle and lower sections, resulting in almost no effective correction of the middle and lower sections and poor adjustment effectiveness; 2. The adjustment process requires repeated lifting of the reinforcing cage, which subjects it to alternating bending moments. This can easily lead to fatigue cracking at the welds of the main reinforcement and stirrups, reducing the overall stiffness of the reinforcing cage and, in severe cases, affecting the quality of the anti-slide pile. Utility Model Content

[0005] The purpose of this application is to provide a positioning component and device for lowering a steel cage into a hole for anti-slip square piles, which solves the problems of ineffective correction of eccentricity in the middle and lower sections due to the attenuation of the lateral force at the top along the depth during the lowering of ultra-long steel cages, as well as fatigue damage to the steel cage caused by repeated lifting.

[0006] The technical solution adopted by this application to solve its technical problem is: In a first aspect, a positioning assembly for the lower hole of a reinforcing cage in an anti-slip square pile is provided, comprising a horizontally arranged support shaft, a positioning tube sleeved on the support shaft, the positioning tube being rotatably connected to the support shaft via a bearing, and a fixing seat connected to the support shaft being spaced apart on one side of the positioning tube; the fixing seat is used for detachably installing on the top of a steel casing, so that the positioning tube is arranged inside the steel casing and parallel to the wall of the steel casing.

[0007] Furthermore, the fixing base includes two vertically and parallel clamping plates. The upper ends of the two clamping plates are fixedly connected by a support plate and form a clamping groove for accommodating the wall of the steel casing. A locking bolt is threaded through and connected to the first clamping plate. The support shaft is parallel to the clamping plate and connected to the second clamping plate.

[0008] Furthermore, the locking bolts include a plurality of bolts, which are spaced apart along the axial direction of the support shaft.

[0009] Furthermore, a fixing nut is connected to the outer surface of the first clamping plate, and a bolt hole is provided on the clamping plate opposite to the inner hole of the fixing nut. The locking bolt is threaded to the fixing nut and passes through the bolt hole.

[0010] Furthermore, the two clamping plates and the support plate are integrally formed.

[0011] Furthermore, both ends of the support shaft are connected to the fixed base via fixing rods.

[0012] Furthermore, the fixing rod includes a vertically arranged first section and an inclined second section, the first section being fixedly connected to the fixing seat, and the second section being connected between the first section and the support shaft.

[0013] Furthermore, the first segment and the second segment are integrally formed structures.

[0014] Furthermore, the support shaft is welded to the fixing rod.

[0015] Secondly, a positioning device for the lower hole of a reinforcing cage for an anti-slip square pile is provided, comprising a square steel casing and a positioning component disposed on each wall of the steel casing, wherein the positioning component is the positioning component for the lower hole of the reinforcing cage for the anti-slip square pile; the fixing seat in each positioning component is detachably installed on the top of the steel casing, so that the positioning tube in each positioning component is arranged inside the steel casing and parallel to the wall of the steel casing, and forms a positioning cavity for lowering the reinforcing cage between all the positioning tubes.

[0016] The beneficial effects of this application are: The positioning assembly and device for lowering the reinforcing cage in the anti-slip square pile provided in this application fixes the positioning assembly to the top of the steel casing, ensuring that the positioning tube remains in rolling contact with the outer surface of the reinforcing cage during the lowering process. This achieves positioning and guidance of the reinforcing cage, ensuring that the center of gravity of the reinforcing cage is always confined to the vicinity of the centerline of the steel casing, avoiding the depth accumulation eccentricity caused by traditional point-based correction. Simultaneously, it allows the reinforcing cage to be lowered continuously in one go without repeated lifting, completely eliminating the risk of alternating bending moments and weld fatigue damage caused by repeated lifting, thus ensuring the overall rigidity of the reinforcing cage. Compared to existing technologies, this application ensures the accuracy of the reinforcing cage's position after lowering, thereby guaranteeing the uniformity of the reinforcing cage protective layer thickness after subsequent concrete pouring. It also improves the efficiency of lowering the reinforcing cage and the quality of pile formation in the anti-slip square pile, offering advantages such as convenient construction, safety, reliability, and reusability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the anti-sliding square pile reinforcement cage lower hole positioning component provided in the embodiments of this application; Figure 2 yes Figure 1 Top view; Figure 3 This is a schematic diagram of the structure of the anti-sliding square pile reinforcement cage lower hole positioning device provided in the embodiments of this application; Figure 4 yes Figure 3 Top view; Figure 5 This is a diagram showing the state of the anti-slip square pile reinforcement cage when it is lowered into the hole; Figure 6 yes Figure 5 Top view.

[0019] Figure label: 1-Steel casing; 2-Reinforcing cage; 3-Positioning cavity; 4-Positioning components; 41-Support shaft; 42-Positioning tube; 43-Bearing; 44-Fixed base; 441-Clamping plate; 442-Support plate; 443-Clamping groove; 444-Locking bolt; 445-Fixing nut; 446-Bolt hole; 45 - Fixed rod; 451 - First section; 452 - Second section. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0021] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] See Figure 1 , Figure 2 This application provides a positioning assembly 4 for the lower hole of the steel cage of an anti-slip square pile, including a horizontally arranged support shaft 41, a positioning tube 42 sleeved on the support shaft 41, the positioning tube 42 being rotatably connected to the support shaft 41 through a bearing 43, and a fixing seat 44 connected to the support shaft 41 being spaced apart on one side of the positioning tube 42; the fixing seat 44 is used to be detachably installed on the top of the steel casing 1 so that the positioning tube 42 is arranged inside the steel casing 1 and parallel to the wall of the steel casing 1.

[0024] See Figure 1 , Figure 2The support shaft 41 is a horizontally arranged straight structure, which can be made of round steel or steel pipe. The positioning tube 42 is sleeved on the support shaft 41, and both ends of the positioning tube 42 are connected to the support shaft 41 through a bearing 43, so that the positioning tube 42 can rotate around the support shaft 41. The left side of the positioning tube 42 is provided with a fixing seat 44 connected to both ends of the support shaft 41. The distance between the positioning tube 42 and the fixing seat 44 should be set according to the design distance between the outer surface of the reinforcing cage 2 and the inner surface of the steel casing 1, to ensure that when the reinforcing cage 2 is positioned by the positioning component 4 during the hole lowering process, the distance between the outer surface of the reinforcing cage 2 and the inner surface of the steel casing 1 meets the design requirements. The fixing seat 44 can be detachably fixed to the top of the steel casing 1 by bolt pairs or quick clamps. After the fixing seat 44 is installed on the top of the steel casing 1, the positioning tube 42 is arranged horizontally inside the steel casing 1 and parallel to the cylinder wall of the steel casing 1.

[0025] See Figure 3 , Figure 4 This application embodiment also provides a positioning device for the lower hole of the anti-slip square pile reinforcement cage, including a square steel casing 1 and positioning components 4 provided on each wall of the steel casing 1. The positioning components 4 are the anti-slip square pile reinforcement cage lower hole positioning components provided in the above embodiment. The fixing seat 44 in each positioning component 4 is detachably installed on the top of the steel casing 1 so that the positioning tube 42 in each positioning component 4 is arranged inside the steel casing 1 and parallel to the wall of the steel casing 1, and forms a positioning cavity 3 for lowering the reinforcement cage 2 between all the positioning tubes 42.

[0026] See Figure 3 , Figure 4 The square steel casing 1 refers to a steel casing 1 with a square or rectangular cross-section. The steel casing 1 is installed inside the hole during the drilling of anti-slide square piles. The outer surface of the steel casing 1 is tightly attached to the hole wall. The steel casing 1 prevents the soil layer inside the hole from collapsing due to construction vibration or groundwater pressure. At least one positioning component 4 is installed on each of the four walls of the steel casing 1. The fixing seat 44 in each positioning component 4 can be detachably fixed to the top of the wall of the steel casing 1 using bolts or quick clamps. The positioning tube 42 in each positioning component 4 is horizontally arranged inside the steel casing 1 and parallel to the wall. The distance between the inner surface of each wall and the centerline of the positioning tube 42 in the positioning component 4 fixed to the wall meets the design requirements. All the positioning tubes 42 together form a positioning cavity 3, which is used for lowering the reinforcing cage 2 and for horizontal positioning of the reinforcing cage 2. For example, one positioning component 4 can be installed on the short side wall of the steel casing 1, and two positioning components 4 can be installed on the long side wall of the steel casing 1.

[0027] The anti-slip square pile reinforcement cage lowering hole positioning component and positioning device provided in this application embodiment are used for positioning the reinforcement cage 2 during the lowering hole process. The specific positioning principle is as follows: See Figure 3 , Figure 4 Before the reinforcing cage 2 is lowered, multiple positioning components 4 are installed on the top of the four walls of the steel casing 1. After all positioning components 4 are installed, a positioning cavity 3 is formed between all the positioning tubes 42. See Figure 5 , Figure 6 The rebar cage 2 is lifted using hoisting equipment and first hoisted above the positioning cavity 3, then slowly lowered. When the lower end of the side wall of the rebar cage 2 contacts the positioning tube 42, the positioning tube 42 passively rotates as the rebar cage 2 is lowered. As the rebar cage 2 is lowered into the positioning cavity 3, the positioning tubes 42 around the rebar cage 2 contact the side wall of the rebar cage 2, positioning the rebar cage 2 horizontally and forming a rolling guide vertically. Because the positioning tube 42 provides linear lateral constraint along the vertical direction of the rebar cage 2, the center of gravity of the rebar cage 2 is always limited to near the center line of the steel casing 1, avoiding the depth accumulation eccentricity caused by traditional point correction. The entire lowering process does not require repeated lifting, and the rebar cage 2 can be placed in place in one go. After the rebar cage 2 is lowered into the hole, the fixing seat 44 can be released to remove the positioning component 4 as a whole, which can be reused when lowering the rebar cage of the next anti-slip square pile.

[0028] The positioning assembly and device for the lowering of the reinforcing cage in the anti-slip square pile provided in this application, by fixing the positioning assembly 4 to the top of the steel casing 1, ensures that the positioning tube 42 remains in rolling contact with the outer surface of the reinforcing cage 2 during the lowering process, thereby achieving positioning and guiding of the reinforcing cage 2. This ensures that the center of gravity of the reinforcing cage 2 is always limited to near the centerline of the steel casing 1, avoiding the depth accumulation eccentricity caused by traditional point-based correction. Simultaneously, it allows the reinforcing cage 2 to be lowered continuously in one go without repeated lifting, completely eliminating the risk of alternating bending moment and weld fatigue damage caused by repeated lifting, and ensuring the overall rigidity of the reinforcing cage. Compared with the prior art, this application can guarantee the accuracy of the position of the reinforcing cage 2 after lowering, thus ensuring the uniformity of the reinforcing concrete cover thickness after subsequent concrete pouring. It also improves the lowering efficiency and pile quality of the reinforcing cage in the anti-slip square pile, and has the advantages of convenient construction, safety, reliability, and reusability.

[0029] To facilitate the installation of the mounting base 44 on the top of the steel casing 1, in some embodiments, see [reference needed]. Figure 1 , Figure 2 The fixing base 44 includes two vertically and parallel clamping plates 441. The upper ends of the two clamping plates 441 are fixedly connected by a support plate 442 and form a clamping groove 443 for accommodating the cylinder wall of the steel casing 1. A locking bolt 444 is threaded through and connected to the first clamping plate 441. The support shaft 41 is parallel to the clamping plate 441 and connected to the second clamping plate 441.

[0030] See Figure 1 , Figure 2 The clamping plate 441 is a vertically arranged rectangular plate with its length direction horizontal. The support plate 442 is a horizontally arranged rectangular plate with its length direction aligned with that of the clamping plate 441. The upper ends of the two clamping plates 441 are fixedly connected by the support plate 442, forming a clamping groove 443 that is open at both ends along the length direction of the clamping plates 441, with the bottom of the clamping groove 443 being open. The width of the clamping groove 443 should be slightly greater than the thickness of the wall of the steel casing 1 so that the wall of the steel casing 1 can be placed within the clamping groove 443. The locking bolt 444 is set perpendicular to the clamping plate 441, passes through the first clamping plate 441, and is threadedly connected to the clamping plate 441. By rotating the locking bolt 444, the distance between the end of the locking bolt 444 and the second clamping plate 441 can be controlled. The support shaft 41 is horizontally set on the right side of the second clamping plate 441. The support shaft 41 and the second clamping plate 441 are parallel and have a gap between them. This gap should be set according to the design distance between the outer surface of the reinforcing cage 2 and the inner surface of the steel casing 1 to ensure that the distance between the outer surface of the reinforcing cage 2 and the inner surface of the steel casing 1 meets the design requirements when the reinforcing cage 2 is positioned by the positioning component 4 during the lowering process.

[0031] See Figure 3 , Figure 4 When installing the positioning component 4, firstly, the clamping groove 443 formed between the two vertical and parallel clamping plates 441 is clamped onto the wall of the steel casing 1 from top to bottom until the support plate 442 is supported on the top of the wall of the steel casing 1; the first clamping plate 441 is located on the outside of the steel casing 1, and the second clamping plate 441 is located on the inside of the steel casing 1; then, tighten the locking bolt 444 that passes through the first clamping plate 441 until the end of the locking bolt 444 presses against the outer wall of the steel casing 1, and the reaction force firmly presses the second clamping plate 441 against the inner wall of the steel casing 1, realizing the quick and detachable locking of the entire fixing seat 44. During disassembly, simply loosen the locking bolt 444, and the fixing seat 44 connecting the support shaft 41 and the positioning tube 42 can be removed from the steel casing 1 as a whole, realizing the reusability of the positioning component 4.

[0032] To ensure a continuous and uniform clamping force between the fixing seat 44 and the steel casing 1, in some embodiments, see [reference needed]. Figure 1 , Figure 2The locking bolts 444 include multiple bolts, which are spaced apart along the axial direction of the support shaft 41. "Multiple" includes two or more bolts. During installation, each locking bolt 444 is screwed in sequentially and tightened alternately, so that the ends of each locking bolt 444 simultaneously press against the outer wall of the steel casing 1, thereby pressing the second clamping plate 441 against the inner wall of the steel casing 1. This multi-point clamping not only significantly improves the anti-slip capability and overall rigidity of the fixing seat 44, but also compensates for gap differences caused by local unevenness of the casing wall, ensuring that the support shaft 41 remains horizontal and stable throughout the entire lowering process of the reinforcing cage. For disassembly, simply loosen all locking bolts 444 in the reverse direction to quickly release the clamps, allowing the positioning component 4 to be reused.

[0033] In some embodiments, the first clamping plate 441 may be provided with a threaded hole, through which the locking bolt 444 passes directly and is threadedly connected.

[0034] In some embodiments, see Figure 1 , Figure 2 A fixing nut 445 is connected to the outer surface of the first clamping plate 441. A bolt hole 446 is provided on the clamping plate 441 opposite to the inner hole of the fixing nut 445. A locking bolt 444 is threaded to the fixing nut 445 and passes through the bolt hole 446. The fixing nut 445 and the clamping plate 441 can be welded together. The inner diameter of the bolt hole 446 is slightly larger than the outer diameter of the locking bolt 444.

[0035] Correspondingly, by setting the fixing nut 445, the thread engagement length is effectively increased, which not only avoids the thread damage caused by the locking bolt 444 directly tapping the thin plate, but also forms a double-layer force path; when the steel cage 2 is lowered, the lateral thrust generated is transmitted to the steel casing 1 through the support shaft 41 and the fixing seat 44. The locking bolt 444 and the fixing nut 445 jointly bear the shear and pull-out loads, which significantly improves the clamping reliability. The two clamping plates 441 can be welded to the support plate 442. See also, in some embodiments, […]. Figure 1 , Figure 2 The two clamping plates 441 and the support plate 442 are integrally formed. For example, the fixing seat 44 is made of a single piece of steel plate, which is cut and bent into a U-shape. Correspondingly, this integrally formed structure allows for a seamless transition between the clamping plates 441 and the support plate 442, eliminating the risks of incomplete welding, stress concentration, and fatigue cracking that may exist in traditional welded connections. At the same time, the integrally formed structure also provides a higher moment of inertia, significantly improving the fixing seat 44's resistance to lateral thrust, and further improving construction efficiency and safety redundancy.

[0036] In some embodiments, see Figure 1 , Figure 2The two ends of the support shaft 41 are connected to the fixed seat 44 via fixing rods 45. One end of the fixing rod 45 is welded to the end of the support shaft 41, and the other end of the fixing rod 45 is welded to the clamping plate 441 of the fixed seat 44.

[0037] In some embodiments, see Figure 1 , Figure 2 The fixing rod 45 includes a vertically arranged first section 451 and an inclined second section 452. The first section 451 is fixedly connected to the fixing seat 44, and the second section 452 is connected between the first section 451 and the support shaft 41. The first section 451 and the second section 452 are integrally formed structures.

[0038] Specifically, the vertical first segment 451 is attached to and welded to the surface of the second clamping plate 441 of the fixing base 44. The lower end of the first segment 451 is bent diagonally downward away from the second clamping plate 441 to form an inclined second segment 452. The lower end of the second segment 452 is then welded to the end of the support shaft 41. This structure makes the inclined second segment 452 form a triangular force transmission path, effectively decomposing the horizontal thrust and vertical shear force generated when the steel cage 2 is lowered, ensuring that the positioning component 4 remains rigid and undisturbed during the continuous lowering of the ultra-long steel cage 2, and improving the stability and reliability of the positioning.

[0039] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A positioning assembly for the lower hole of a reinforcing cage in an anti-slip square pile, characterized in that, The device includes a horizontally arranged support shaft (41), on which a positioning tube (42) is sleeved. The positioning tube (42) is rotatably connected to the support shaft (41) via a bearing (43). A fixing seat (44) connected to the support shaft (41) is provided at intervals on one side of the positioning tube (42). The fixing seat (44) is used to be detachably installed on the top of the steel casing (1) so that the positioning tube (42) is arranged inside the steel casing (1) and parallel to the wall of the steel casing (1).

2. The anti-slip square pile reinforcement cage lower hole positioning component according to claim 1, characterized in that, The fixing base (44) includes two vertically and parallel clamping plates (441). The upper ends of the two clamping plates (441) are fixedly connected by a support plate (442) and form a clamping groove (443) for accommodating the wall of the steel casing (1). A locking bolt (444) is threaded through and connected to the first clamping plate (441). The support shaft (41) is parallel to the clamping plate (441) and connected to the second clamping plate (441).

3. The anti-slip square pile reinforcement cage lower hole positioning component according to claim 2, characterized in that, The locking bolts (444) include a plurality of bolts, which are spaced apart along the axial direction of the support shaft (41).

4. The anti-slip square pile reinforcement cage lower hole positioning assembly according to claim 2 or 3, characterized in that, The outer surface of the first clamping plate (441) is connected to a fixing nut (445). The clamping plate (441) is provided with a bolt hole (446) at the position opposite to the inner hole of the fixing nut (445). The locking bolt (444) is threadedly connected to the fixing nut (445) and passes through the bolt hole (446).

5. The anti-slip square pile reinforcement cage lower hole positioning assembly according to claim 2 or 3, characterized in that, The two clamping plates (441) and the support plate (442) are integrally formed.

6. The anti-slip square pile reinforcement cage lower hole positioning component according to claim 1, characterized in that, The two ends of the support shaft (41) are connected to the fixed seat (44) by fixing rods (45).

7. The anti-slip square pile reinforcement cage lower hole positioning component according to claim 6, characterized in that, The fixing rod (45) includes a first section (451) arranged vertically and a second section (452) arranged at an angle. The first section (451) is fixedly connected to the fixing seat (44), and the second section (452) is connected between the first section (451) and the support shaft (41).

8. The anti-slip square pile reinforcement cage lower hole positioning component according to claim 7, characterized in that, The first segment (451) and the second segment (452) are integrally formed structures.

9. The anti-slip square pile reinforcement cage lower hole positioning assembly according to claim 6, 7 or 8, characterized in that, The support shaft (41) is welded to the fixing rod (45).

10. A positioning device for the lower hole of a steel cage in an anti-slip square pile, characterized in that, It includes a square steel casing (1) and a positioning assembly (4) provided on each wall of the steel casing (1), wherein the positioning assembly (4) is the anti-slip square pile reinforcement cage lower hole positioning assembly according to any one of claims 1 to 9; The fixing seat (44) in each of the positioning components (4) is detachably installed on the top of the steel casing (1) so that the positioning tube (42) in each of the positioning components (4) is arranged inside the steel casing (1) and parallel to the wall of the steel casing (1), and forms a positioning cavity (3) for lowering the steel cage (2) between all the positioning tubes (42).

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