Double-layer guide frame for pile casing burying under construction

Abstract

The application discloses a double-layer guide frame for bored pile casing burying construction, relates to the technical field of bored pile casing burying construction, and is installed on a drilling platform and used for guiding and dynamically correcting the sinking process of the bored pile casing burying construction. The double-layer guide frame for bored pile casing burying construction comprises a butt joint mechanism, four modular adjusting mechanisms, four guide mechanisms and a locking mechanism. The double-layer guide frame has the advantages that the quick sliding of the guide frame on the drilling platform is realized through the moving piece (i.e., the heavy-duty damping castor design) at the bottom of the butt joint mechanism, the complicated procedures such as cutting, welding and polishing are avoided, the single-time transfer time is shortened from the hour level, and the construction efficiency is greatly improved; the radial synchronous sliding design of the four modular adjusting mechanisms realizes the continuous adjustment of the guide space within a certain range; and the utilization rate and the economy of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of construction technology for the embedment of cast-in-place pile casings, and in particular to a double-layer guide frame for the embedment of cast-in-place pile casings. Background Technology

[0002] Cast-in-place piles are a widely used foundation type in civil engineering, bridge engineering, port engineering, and other fields. The construction quality of these piles directly affects the safety and stability of the superstructure. During the construction of cast-in-place piles, the installation of the steel casing is a crucial first step. To ensure that the steel casing can be accurately and vertically sunk to the designed position, a guide frame is typically used to assist in the construction.

[0003] Currently, guide frames are installed on the drilling platform, and guiding devices constrain and guide the sinking process of the casing. Existing guide frames are mostly fixed to the drilling platform by welding. While this connection method ensures overall rigidity during construction, it necessitates cutting, grinding, and re-welding when relocating to the next pile location. This process is cumbersome, time-consuming, and the frequent installation and dismantling significantly increases the pressure on the construction schedule, severely hindering the improvement of construction efficiency.

[0004] Secondly, the existing guide frames have limited adjustment capabilities in terms of guiding space. Although some guide frames are equipped with adjustment devices such as jacks, their adjustment range is usually small and cannot meet the construction needs of casings with different diameters. When a project involves multiple pile diameters, it is necessary to manufacture multiple sets of guide frames of different specifications, which not only increases equipment investment costs but also brings additional burdens in terms of storage, management, and transportation, resulting in low equipment utilization.

[0005] Therefore, in order to achieve rapid installation, dismantling and relocation and adapt to construction of various pile diameters, this invention provides a double-layer guide frame for the construction of buried casing for cast-in-place piles. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art, and to propose a double-layer guide frame for the construction of cast-in-place pile casing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a double-layer guide frame for the construction of buried casing of cast-in-place piles, installed on a drilling platform, comprising: a docking mechanism, wherein the docking mechanism includes a docking part and a supporting part, the docking part including a docking platform and a movable part and a supporting part installed on the bottom wall of the docking platform.

[0008] The movable component is used to drive the docking part to move, and the support component is used to contact and support the drilling platform when the casing is inserted. The movable component and the support component cooperate to dock the docking mechanism and the drilling platform for transfer docking.

[0009] Four modular adjustment mechanisms are distributed circumferentially and slidably mounted on the support; eight guide mechanisms are correspondingly mounted on the four modular adjustment mechanisms.

[0010] The four modular adjustment mechanisms move radially closer or further apart to accommodate cast-in-place pile casings of different diameters; the locking mechanism is used for multiple locking of the drilling platform, docking mechanism, and modular adjustment mechanism after docking and position adjustment; the guiding mechanism is used to contact the casing during the casing burial construction process and perform guiding and dynamic correction operations.

[0011] In the aforementioned double-layer guide frame for the construction of embedded casing for cast-in-place piles, the moving parts are multiple retractable casters distributed in a matrix, and the supporting parts are inverted trapezoidal support platforms symmetrically distributed on the left and right.

[0012] In the above-mentioned double-layer guide frame for the construction of cast-in-place pile casing, the drilling platform includes a central platform and connecting seats fixed on both sides of the central platform. The central platform has holes for the cast-in-place pile casing to pass through. The connecting seats are inverted L-shaped structures with openings facing each other. The inverted trapezoidal support platform contacts and cooperates with the central platform and the connecting seats.

[0013] In the above-mentioned double-layer guide frame for the construction of the casing of a cast-in-place pile, the support part is in the shape of a rectangular frame and is installed on the docking platform. The rectangular frame is specifically a two-layer frame structure, and the two-layer frame structure is connected by multiple columns.

[0014] In the above-mentioned double-layer guide frame for the construction of embedded casing of cast-in-place piles, sliding platforms can be detachably installed at the four corners of the upper and lower frame structures of the support part, and the modular adjustment mechanism is slidably connected to the support part through the sliding platforms.

[0015] In the above-mentioned double-layer guide frame for the construction of cast-in-place pile casing, the modular adjustment mechanism includes a sliding frame and an extension docking part. The sliding frame has upper and lower plate-like structures, which are connected by three columns. The extension docking part includes four extension plates, which are respectively fixed to the side walls of the upper and lower plate-like structures.

[0016] In the above-mentioned double-layer guide frame for the construction of the casing of a cast-in-place pile, the locking mechanism includes four locking rods, and multiple locking holes for the locking rods to be inserted are provided on the extension plate. The four modular adjustment mechanisms are locked to each other through the locking rods.

[0017] In the above-mentioned double-layer guide frame for the construction of the casing of a cast-in-place pile, the locking mechanism also includes two F-type support frames, which are symmetrically installed on the lower frame structure of the support.

[0018] In the above-mentioned double-layer guide frame for the construction of the casing of a cast-in-place pile, the F-type support frame is slidably connected to the Z-type connecting frame on the side away from the support part. The Z-type connecting frame is connected to the docking platform and the connecting seat by high-strength bolts.

[0019] In the above-mentioned double-layer guide frame for the construction of cast-in-place pile casing, eight guide mechanisms are respectively installed on four sliding frames. The guide mechanism includes a thrust box, a positioning box, and a fixed pulley. The thrust box is assembled on the top wall of the upper and lower plate-like structures of the sliding frame. The positioning box is slidably connected to the inside of the thrust box. The fixed pulley is installed on the positioning box and is distributed along the circumferential direction on the outside of the cast-in-place pile casing.

[0020] Compared with existing technologies, the advantages of this invention are: rapid installation, dismantling and relocation, greatly improving construction efficiency; adjustable and adaptable within a range, multi-purpose and cost-reducing; double-layer guidance, dynamic correction and multiple locking, ensuring high-precision construction.

[0021] 1. The guide frame is quickly slid into position on the drilling platform via the movable component at the bottom of the docking mechanism (i.e., heavy-duty vibration-damping casters). In the transfer mode, the casters extend, suspending the entire guide frame in the air, allowing operators to easily push it to the next pile location. In the working mode, the casters retract, ensuring close contact between the support component and the central platform for load-bearing. Compared to existing technologies that require welding for fixing, this method avoids cumbersome processes such as cutting, welding, and grinding, reducing single transfer time from hours to significantly improving construction efficiency.

[0022] 2. Through the radial synchronous sliding design of four modular adjustment mechanisms, the guide space is continuously adjustable within a certain range. Specifically, the sliding frame is driven by a hydraulic cylinder to move radially on the sliding platform, and one set of guide frames can adapt to the construction of cast-in-place pile casings of various diameters. This modular and adjustable design avoids the problem of needing to manufacture multiple sets of guide frames for different pile diameters in traditional solutions, significantly reducing equipment investment costs and improving equipment utilization and economy.

[0023] 3. Four modular adjustment mechanisms drive the upper guide mechanism for coarse positioning, while the lower guide mechanism, in conjunction with the precise drive of a mechanical screw jack, dynamically corrects deviation during the casing's descent. Simultaneously, the locking mechanism, through radial locking of the locking rod, Z-shaped connecting frame, and overall locking with high-strength bolts, forms a multi-locking system to ensure overall rigidity during casing insertion, guaranteeing construction quality and safety. Attached Figure Description

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 A schematic diagram of the structure of a double-layer guide frame installed as a whole on a drilling platform for the construction of embedded casing for cast-in-place piles;

[0025] Figure 2 This is a schematic diagram of the drilling platform.

[0026] Figure 3 A schematic diagram of the overall structure of the double-layer guide frame used for the construction of embedded casing for cast-in-place piles;

[0027] Figure 4 This is a structural schematic diagram of the support section;

[0028] Figure 5 This is a partial structural diagram of the support section, modular adjustment mechanism, and guide mechanism;

[0029] Figure 6 A partial structural diagram of the modular adjustment mechanism and locking mechanism;

[0030] Figure 7 for Figure 1 Enlarged structural diagram at point A;

[0031] Figure 8 This is a schematic diagram of the structure when the Z-type connecting frame is connected to the connecting seat and docking platform.

[0032] In the diagram: 100, Drilling platform; 101, Middle platform; 102, Connecting seat; 1, Docking mechanism; 11, Docking part; 111, Docking platform; 112, Moving part; 113, Supporting part; 12, Supporting part; 121, Sliding table; 2, Modular adjustment mechanism; 21, Sliding frame; 22, Extended docking part; 221, Extension plate; 222, Locking hole; 3, Guide mechanism; 31, Thrust box; 32, Positioning box; 33, Fixed pulley; 4, Locking mechanism; 41, Locking rod; 42, F-type support frame; 43, Z-type connecting frame. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figure 1 A double-layer guide frame for the installation of cast-in-place pile casings is installed on a drilling platform 100 to guide and dynamically correct the sinking process of the cast-in-place pile casings during installation. The double-layer guide frame for the installation of cast-in-place pile casings includes a docking mechanism 1, four modular adjustment mechanisms 2, four guiding mechanisms 3, and a locking mechanism 4.

[0035] Reference Figures 1 to 2The drilling platform 100 is a steel structure transfer platform, including a central platform 101 and connecting seats 102 fixed to both sides of the central platform 101. A circular hole with a diameter larger than the maximum construction pile diameter is opened in the center of the central platform 101 to allow the casing to pass through, facilitating casing insertion. The two sides of the central platform 101 are securely connected to the ground via multiple grounding nails, which are driven into the ground to a certain depth to ensure that the drilling platform 100 does not shift or overturn during casing insertion. The two connecting seats 102 have openings facing each other and are inverted L-shaped structures composed of horizontal and vertical sections, welded and fixed to the top walls of both sides of the central platform 101.

[0036] It should be noted that after the drilling platform 100 is installed, the top wall of the middle platform 101 is at the same height as the foundation, so that the double-layer guide frame used for subsequent casing burial construction can be moved and connected smoothly.

[0037] Reference Figures 1 to 3 The docking mechanism 1 includes a docking section 11 and a support section 12. The docking section 11 includes a docking platform 111, support members 113 symmetrically mounted on the bottom wall of the docking platform 111, and four movable members 112 mounted in a matrix on the bottom wall of the docking platform 111. The dimensions of the docking platform 111 are adapted to the central platform 101.

[0038] The movable component 112 is used to move the docking part 11, facilitating the rapid relocation and positioning of the guide frame. Specifically, the movable component 112 is a telescopic caster (a mature existing technology, which will not be elaborated further here). The caster body is made of heavy-duty vibration-damping material, which can effectively absorb the impact caused by uneven road surfaces during the movement of the guide frame. The telescopic system of the caster (not shown in the figure) adopts a hydraulic or mechanical screw structure, which can drive the caster body to move up and down.

[0039] The support component 113 is an inverted trapezoidal support platform installed in the middle of the bottom wall of the docking platform 111. The bottom surface of the inverted trapezoidal support platform is flat and contacts and cooperates with the top wall of the middle platform 101 and the connecting seat 102.

[0040] In the relocation state, the casters extend and touch the ground, the docking platform 111 is lifted, and the bottom wall height of the support component 113 is higher than the bottom wall height of the casters at this time. In the working state, the casters retract and the main body lifts off the ground, the docking platform 111 falls, causing the support component 113 to move downwards, and the support component 113 contacts and bears the load with the central platform 101. Compared with the welding and fixing methods in the prior art, this method avoids cumbersome processes such as cutting, welding, and grinding, and reduces the single relocation time from hours to significantly improve construction efficiency.

[0041] Reference Figures 3 to 4The support 12 is a rectangular frame that is welded to the top wall of the docking platform 111. Specifically, the support 12 is a rectangular frame consisting of two upper and lower frame structures and four columns connecting the two upper and lower frame structures. The four columns are respectively connected to the four corners of the upper and lower frame structures, and stiffening columns are also provided between the upper and lower frame structures to improve the strength of the frame.

[0042] Sliding platforms 121 can be detachably installed at the four corners of the upper and lower frame structures of the support part 12 for installing the modular adjustment mechanism 2. The upper surface of the sliding platform 121 has a sliding groove. The upper frame structure of the support part 12 is equipped with a guardrail around its top wall. The guardrail is not less than 1.2 meters high and has a middle crossbar. The detachable installation methods mentioned above include, but are not limited to, bolt connection, pin connection, and snap-fit ​​connection.

[0043] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 There are four modular adjustment mechanisms 2, evenly distributed circumferentially, corresponding to the four positions of the protective casing. Each modular adjustment mechanism 2 includes a sliding frame 21 and an extended docking part 22.

[0044] The sliding frame 21 adopts a welded steel structure, with upper and lower plate-like structures and three columns connecting the upper and lower plate-like structures. The bottom surface of the upper and lower plate-like structures is provided with sliders (not shown in the figure) that cooperate with the sliding grooves of the sliding table 121.

[0045] Each of the four columns is equipped with a hydraulic cylinder (not shown in the figure). Each sliding frame 21 is connected to the output end of the hydraulic cylinder. Driven by the hydraulic cylinder, it slides onto the sliding platform 121, allowing it to move radially closer or further away to accommodate casings of different diameters. The hydraulic cylinder drives the four sliding frames 21 to move radially synchronously, ensuring coaxiality with the casing during adjustment. The adjustment range is designed to cover pile diameters from 1.5 meters to 3.0 meters, and the applicable range can be further expanded by replacing sliding platforms 121 of different sizes. A single set of guide frames can accommodate casings of various diameters, avoiding the need to manufacture multiple sets of guide frames for different pile diameters in traditional solutions. This significantly reduces equipment investment costs and improves equipment utilization and economy.

[0046] The extension docking part 22 includes four extension plates 221, which are respectively fixed to the side walls of the upper and lower plate-like structures. The surface of the extension plates 221 is welded perpendicularly to the side walls of the plate-like structures. The extension plates 221 on adjacent sliding frames 21 are staggered with each other, that is, the left extension plate 221 of one sliding frame 21 overlaps with the right extension plate 221 of the adjacent sliding frame 21 in the vertical direction, and the front extension plate 221 of one sliding frame 21 overlaps with the rear extension plate 221 of the adjacent sliding frame 21 in the vertical direction, which facilitates subsequent penetration and locking. Multiple locking holes 222 are provided on the extension plates 221 along the length direction.

[0047] Reference Figure 1 , Figure 3 and Figure 5 There are eight guide mechanisms 3 in total, which are installed on the sliding frames 21 of the four modular adjustment mechanisms 2. Each sliding frame 21 is equipped with two guide mechanisms 3. Each guide mechanism 3 includes a thrust box 31, a positioning box 32, and a fixed pulley 33.

[0048] The thrust box 31 is a rectangular box structure, assembled on the top wall of the upper and lower plate-like structures of the sliding frame 21. The interior of the thrust box 31 is hollow, forming a guide cavity for the positioning box 32 to slide. A mechanical screw jack (not shown in the figure, and is a mature existing technology, so it will not be described in detail here) is installed inside the thrust box 31. The side of the thrust box 31 near the protective sleeve is open, allowing the positioning box 32 to extend out.

[0049] The positioning box 32 is a rectangular box structure, which is slidably installed in the guide cavity of the thrust box 31. The positioning box 32 is connected to the screw output end of the mechanical screw jack, and a fixed pulley 33 is installed at the end that extends out of the thrust box 31.

[0050] The groove shape of the fixed pulley 33 is adapted to the outer diameter of the protective cylinder, and the wheel surface is hardened. The four fixed pulleys 33 are evenly distributed along the circumference to guide and limit the movement of the protective cylinder.

[0051] It is important to note that the fixed pulleys 33 at corresponding positions on the upper and lower layers form a double-layer guide. The distance between the guide points on the upper and lower layers is 2.55 meters. This distance has been optimized to ensure sufficient guide length while facilitating observation and adjustment by the operator. The upper fixed pulley 33 is used for coarse positioning during casing insertion, employing a larger guide clearance (e.g., 10 mm) to facilitate rapid casing insertion. The lower fixed pulley 33 is used for precise correction during the sinking process, employing a smaller guide clearance (e.g., 3 mm) to ensure the verticality of the casing. The maximum stroke of this mechanical screw jack is 175 mm, which can meet the dynamic correction requirements during the casing sinking process.

[0052] It should be noted that the sliding groove of the sliding table 121, the sliders of the upper and lower plate-like structures, and the inner wall of the guide cavity of the thrust box 31 are all coated with grease to reduce sliding friction.

[0053] Reference Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 The locking mechanism 4 includes four locking rods 41, two F-type support brackets 42 and two Z-type connecting brackets 43.

[0054] The locking rod 41 is a cylindrical steel rod with a diameter that matches the locking hole 222 on the extension plate 221. When the four modular adjustment mechanisms 2 are driven to move radially to a predetermined position that adapts to the diameter of the protective sleeve by the output end of the hydraulic cylinder, the four locking rods 41 are inserted into the corresponding locking holes 222 on the extension plate 221 from top to bottom.

[0055] As the output end of the hydraulic cylinder stops moving, the positions of the four modular adjustment mechanisms 2 and the support part 12 also no longer change. At the same time, the locking rod passes through and locks from top to bottom, passing through the two extension plates 221 corresponding to the upper plate structure of the adjacent sliding frame 21 and the two extension plates 221 corresponding to the lower plate structure of the adjacent sliding frame 21 in sequence, thereby radially locking the four modular adjustment mechanisms 2 to each other and preventing them from shifting due to vibration during construction.

[0056] Two F-type support brackets 42 are symmetrically fixedly installed on the lower frame structure of the support part 12. The horizontal part of the F-type support bracket 42 is used to limit and support the corresponding extension plate 221.

[0057] A Z-type connecting frame 43 is slidably mounted up and down on the side of the F-type support frame 42 away from the support part 12 via a hydraulic rod (not shown in the figure).

[0058] When the hydraulic rod drives the Z-shaped connecting frame 43 to move downward, the vertical section of the Z-shaped connecting frame 43 moves downward and engages with the middle of the connecting seat 102 to prevent the docking mechanism 1 from shifting in the front and rear positions; the lower horizontal section of the Z-shaped connecting frame 43 is connected to the docking platform 111 and the connecting seat 102 by high-strength bolts for further locking.

[0059] To enhance connection strength, four sets of high-strength bolts can be used at the four corners of the docking platform 111 and the front and rear ends of the connecting seat 102 (e.g., ...). Figures 1 to 3 As shown, the docking platform 111 and the connecting seat 102 are further connected to firmly connect the drilling platform 100, the docking mechanism 1 and the modular adjustment mechanism 2 into one unit.

[0060] The specific operation steps of the double-layer guide frame used for the installation of the casing of this cast-in-place pile are as follows: Step 1: Installation of drilling platform 100. At the construction pier location, first complete the installation of drilling platform 100. Hoist drilling platform 100 into place.

[0061] Step 2: Guide frame positioning. After the drilling platform 100 is installed and fixed, the operator pushes or uses a traction device to move the double-layer guide frame as a whole to the pile position to be constructed, so that the docking platform 111 and the connecting seat 102 are aligned.

[0062] Step 3: Radial adjustment. Based on the design diameter of the casing to be constructed, four modular adjustment mechanisms 2 are driven by hydraulic cylinders to move synchronously radially, so that the guide space formed by the four fixed pulleys 33 matches the outer diameter of the casing.

[0063] Step 4: Initial locking. Insert the four locking rods 41 into the corresponding locking holes 222 on the extension plate 221 from top to bottom to radially lock the four modular adjustment mechanisms 2 to each other, and fix the positions of the modular adjustment mechanisms 2 and the support part 12 as the output of the hydraulic cylinder stops.

[0064] Step 5: Overall Locking. Drive the Z-shaped connecting frame 43 downwards using a hydraulic rod, aligning the lower horizontal section of the Z-shaped connecting frame 43 with the horizontal section of the connecting seat 102. Then, insert high-strength bolts to securely connect the Z-shaped connecting frame 43 to the docking platform 111 and the connecting seat 102. If necessary, install four sets of high-strength bolts to further strengthen the connection.

[0065] Step 6: Casing Installation. The casing is lifted using a crawler crane. It is then lifted horizontally, turned vertically, and slowly lowered until its bottom enters the guide space created by the upper fixed pulley 33. The upper fixed pulley 33 has a large guide clearance to facilitate rapid casing insertion. The casing continues to lower, passing through the lower fixed pulley 33, and sinks into the soil under its own weight.

[0066] During the sinking process, the surveyors checked the horizontal position and verticality of the casing every 2 meters. If any deviation was found, the positioning box 32 was moved horizontally by operating the mechanical screw jack of the lower guide mechanism 3, which in turn drove the fixed pulley 33 to push the casing and perform dynamic correction.

[0067] When the first casing section sinks to near the top of the guide frame, the sinking is stopped, and the second casing section is welded to extend it. After welding is completed, the sinking continues, and the above process is repeated until the casing section sinks to the design elevation.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 invention and simplifying the description, and are not intended to 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 invention.

[0069] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A double-layer guide frame for the installation of casing in cast-in-place piles, installed on a drilling platform, characterized in that, include: A docking mechanism, comprising a docking section and a supporting section, wherein the docking section includes a docking platform and a movable component and a supporting component installed on the bottom wall of the docking platform; The movable component is used to drive the docking part to move, and the support component is used to contact and support the drilling platform when the casing is inserted. The movable component and the support component cooperate to dock the docking mechanism and the drilling platform for transfer docking. Four modular adjustment mechanisms are distributed circumferentially and slidably mounted on the support. Eight guiding mechanisms are installed on four modular adjustment mechanisms; The four modular adjustment mechanisms move radially closer or further apart to accommodate casings of different diameters; the locking mechanism is used for multiple locking of the drilling platform, docking mechanism, and modular adjustment mechanism after docking and position adjustment; the guiding mechanism is used to contact the casing during the casing burial construction process and perform guiding and dynamic correction operations.

2. The double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 1, characterized in that, The movable components are multiple retractable casters arranged in a matrix, and the supporting components are inverted trapezoidal support platforms symmetrically distributed on the left and right.

3. A double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 2, characterized in that, The drilling platform includes a central platform and connecting seats fixed on both sides of the central platform. The central platform has holes for the casing to pass through. The connecting seats are inverted L-shaped structures with openings facing each other. An inverted trapezoidal support platform contacts and engages with the central platform and the connecting seats.

4. A double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 1, characterized in that, The support is in the shape of a rectangular frame and is installed on the docking platform. The rectangular frame is specifically a two-layer frame structure, and the two layers of frame structure are connected by multiple columns.

5. A double-layer guide frame for the construction of embedded casing for cast-in-place piles according to claim 4, characterized in that, Sliding platforms can be detachably installed at the four corners of the upper and lower frame structures of the support part, and the modular adjustment mechanism is slidably connected to the support part through the sliding platforms.

6. A double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 5, characterized in that, The modular adjustment mechanism includes a sliding frame and an extension docking part. The sliding frame has an upper and lower plate structure, which are connected by three columns. The extension docking part includes four extension plates, which are respectively fixed to the side walls of the upper and lower plate structures.

7. A double-layer guide frame for the construction of embedded casing for cast-in-place piles according to claim 6, characterized in that, The locking mechanism includes four locking rods, and the extension plate has multiple locking holes for the locking rods to be inserted. The four modular adjustment mechanisms are locked to each other through the locking rods.

8. A double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 7, characterized in that, The locking mechanism also includes two F-shaped support brackets, which are symmetrically installed on the lower frame structure of the support.

9. A double-layer guide frame for the construction of embedded casing in cast-in-place piles according to claim 8, characterized in that, The F-type support frame is slidably connected to a Z-type connecting frame on the side away from the support part. The Z-type connecting frame is connected to the docking platform and the connecting seat by high-strength bolts.

10. A double-layer guide frame for the construction of embedded casing for cast-in-place piles according to claim 6, characterized in that, The eight guide mechanisms are respectively installed on four sliding frames, and each sliding frame is equipped with two guide mechanisms. The guide mechanism includes a thrust box, a positioning box and a fixed pulley. The thrust box is assembled on the top wall of the upper and lower plate-like structures of the sliding frame. The positioning box is slidably connected to the inside of the thrust box. The fixed pulley is installed on the positioning box and is distributed in a circumferential direction on the outside of the protective cylinder.

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