A kind of assembled adjustable concrete bored pile guide pipe fixing device

Abstract

The utility model relates to an adjustable assembly type concrete pouring pile guide pipe fixing device, aims at solving the problem of poor adaptability and inconvenient operation of the traditional guide pipe fixing mode, etc. The device is composed of a base, a limiting base, a limiting baffle assembly, an adjusting mechanism and a locking mechanism. The base is fixed to the ground of the pouring pile orifice to provide stable support for the device. The limiting base can be flexibly moved to adapt to guide pipes of different diameters through the adjusting mechanism. The limiting baffle assembly limits the horizontal displacement of the guide pipe. The locking mechanism ensures the perpendicularity of the guide pipe. The device adopts modular design, is convenient and efficient to install and adjust, can quickly adapt to guide pipes of various specifications, has high fixing stability and reliability, and can effectively guarantee the pouring quality of the pouring pile. At the same time, the device has excellent safety and durability, good flexibility and reusability, can reduce construction cost, improve resource utilization, and is suitable for various engineering scenes.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering, specifically to a prefabricated adjustable concrete pouring pile guide pipe fixing device. Background Technology

[0002] In the construction of cast-in-place concrete piles, the lowering and fixing of the tremie pipe is one of the key steps to ensure the quality of the pile. Currently, the following three methods are commonly used on site to fix the tremie pipe: Steel bar welding support: It is necessary to temporarily weld steel or steel bar frame at the opening. Both installation and dismantling require hot work, the process is complicated and cannot be reused. Dismantling also requires cutting, which consumes labor and generates waste. Pre-embedded fasteners: Steel plates or pipes are pre-welded onto the reinforcing cage as clamps. This method requires high precision in the processing of the reinforcing cage. Once the position is deviated, the guide pipe will not be able to be aligned. Moreover, the pre-embedded fasteners sink into the ground with the reinforcing cage and cannot be recovered. The materials are consumed at one time. Simple steel supports: These are supported by pipe wrenches or screws, but have few stress points and poor stability. In deep holes, large diameters, or high-flow-rate concrete conditions, they are prone to guide pipe displacement and swaying, resulting in quality defects such as mud inclusion and pile breakage.

[0003] The above methods share the following shortcomings: Poor adaptability: One type of stent can only be adapted to one type of catheter diameter, and it needs to be remade when the catheter diameter is changed; Adjustment difficulties: The limited space on site makes it difficult to achieve fine-tuning through welding or support methods, resulting in low centering accuracy; Low reuse rate: Welded or embedded parts are all scrapped at once, resulting in a large waste of materials and failing to meet the requirements of green construction. The construction process is complex: it requires a significant investment of manpower and time for pre-embedding operations, and is also costly. Furthermore, the pre-embedded fasteners pose certain safety hazards during construction; hot work, cutting and dismantling, and support instability all present risks of personal injury. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide a prefabricated adjustable concrete grouting pile guide pipe fixing device to solve the problems of poor adaptability and inconvenient operation of traditional guide pipe fixing methods.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows: An assembled adjustable concrete pile guide pipe fixing device is characterized by comprising a base, a limiting base, a limiting baffle assembly, an adjusting mechanism, and a locking mechanism; the base provides basic support and is fixedly connected to the ground at the pile borehole opening; the limiting base is movably mounted on the base via the adjusting mechanism to accommodate guide pipes of different diameters; the limiting baffle assembly is connected to the limiting base to limit the horizontal displacement of the guide pipe; the locking mechanism is mounted on the limiting baffle assembly to clamp the guide pipe and ensure its verticality; the overall device adopts a modular design, and the guide pipe is stably fixed through adjustment and locking.

[0006] The base, serving as the fundamental support component of the entire device, is fixedly connected to the ground at the borehole opening of the cast-in-place pile via bolts or welding. This fixing method ensures the stability of the device during construction, preventing movement or shaking due to external factors and providing a reliable foundation for subsequent guide pipe fixing operations. Simultaneously, the base is equipped with slide rails and lifting rings. The slide rails provide a track for the movement of the limiting base, allowing it to move linearly in a predetermined direction, thus adapting to guide pipes of different diameters. The lifting rings facilitate the hoisting and movement of the device. When the device needs to be moved on-site, it can be easily moved to the designated location by hooking the lifting rings with hoisting equipment, improving construction flexibility and efficiency. Furthermore, the base is equipped with internal support rods, which enhance the rigidity of the base, enabling it to withstand various external forces during construction and ensuring the overall structural stability of the device. Multiple limiting holes are formed on the internal support rods; these holes, in conjunction with anti-overturning limiting rods, prevent the limiting base from axially rotating and overturning during adjustment.

[0007] The limiting base includes a threaded rod, bolts, pads, hinges, and an anti-tipping limiting rod. One end of the threaded rod is fixedly connected to the main body of the limiting base, and the other end passes through a threaded hole on the base. By rotating the threaded rod, the position of the limiting base on the base can be precisely adjusted to accommodate the installation requirements of conduits of different diameters. This adjustment method is simple to operate, allows for quick position adjustment, and improves construction efficiency. Bolts are used to fix the limiting base after position adjustment, ensuring that the limiting base will not move due to external forces during construction, thus guaranteeing the stability of the conduit fixation. Pads are placed between the limiting base and the base to enhance connection stability, distribute the pressure of the limiting base on the base, and prevent excessive local stress from damaging the base. Hinges are used to connect the limiting base and the limiting baffle assembly, enabling angle adjustment so that the limiting baffle assembly can better fit conduits at different angles, improving the limiting effect on the conduit. The anti-tipping limiting rod and the limiting base are integrated into one structure. When inserted into the limiting hole of the inner support rod on the base, it can effectively prevent the limiting base from axially rotating and tipping over during the adjustment process, thus further ensuring the stability and safety of the device.

[0008] The limiting baffle assembly includes a limiting baffle, a locking ring, and a pin. The limiting baffle is connected to the limiting base via a hinge and can rotate around the hinge axis to adjust the angle. Its side in contact with the conduit has an arc-shaped groove. This groove design allows for better contact with the conduit's outer wall, increasing the contact area and improving the restriction of horizontal displacement, ensuring the conduit does not wobble during construction. The locking ring consists of two semi-circular rings connected by a hinge, allowing it to be opened and closed around the conduit. This openable design makes installation and removal of the locking ring more convenient and quick, improving construction efficiency. The pin passes through the connecting holes at both ends of the locking ring, locking it onto the conduit and ensuring its verticality. A handle is provided at the pin head, allowing operators to quickly insert and remove the pin, enabling rapid opening and closing of the locking ring and further improving construction convenience.

[0009] The adjustment mechanism mainly consists of a threaded rod and a slide rail. The threaded rod, through rotation, precisely adjusts the position of the limiting base. Construction personnel can flexibly rotate the threaded rod according to the diameter of the conduit, moving the limiting base to the appropriate position to accommodate conduits of different diameters. The slide rail provides guidance for the movement of the limiting base, ensuring it moves along a predetermined straight line, avoiding deviation and jamming during movement, and improving the accuracy and stability of the adjustment.

[0010] The locking mechanism consists of a locking ring and a pin. A rubber gasket is installed on the inner wall of the locking ring. This gasket increases the friction between the locking ring and the guide tube, making the locking effect more secure and preventing damage to the guide tube during the locking process, thus protecting the quality of the guide tube. The pin is used to fix the locking ring. By inserting it into the connecting holes at both ends of the locking ring, the two semi-circular locking rings are tightly connected together, ensuring that the guide tube remains vertical during construction and will not tilt due to external forces, thus guaranteeing the construction quality of the cast-in-place pile.

[0011] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a prefabricated adjustable concrete pile guide pipe fixing device. The overall device adopts a modular design concept, with each component being relatively independent yet closely coordinated. At the construction site, installers can quickly assemble the device without complex operating procedures or specialized skills. Taking the fixing of the base to the ground as an example, a stable connection between the base and the ground at the pile borehole can be achieved through simple bolt connections or welding, laying the foundation for subsequent work. In the adjustment stage, the threaded rod design makes the position adjustment of the limiting base extremely convenient. Construction personnel only need to easily rotate the threaded rod to precisely control the movement distance of the limiting base on the base, thereby quickly adapting to guide pipes of different diameters. This convenient adjustment method greatly shortens the construction preparation time, improves construction efficiency, and effectively avoids construction delays caused by adjustment difficulties.

[0012] The adjustment mechanism and limiting base design of this device fully consider the diversity of conduits used in actual construction. Since different engineering projects may use conduit diameters that vary, traditional fixing methods often fail to meet these variations. However, this invention, through the cooperation of threaded rods and slide rails, enables the limiting base to be adjusted within a wide range of positions. Regardless of the conduit diameter, precise adjustment of the limiting base position ensures a tight fit between the limiting baffle assembly and the conduit, effectively fixing conduits of different diameters. This strong adaptability and versatility allows the device to be widely used in various engineering scenarios, reducing the cost and time of customizing fixing devices for different conduit specifications and improving resource utilization efficiency.

[0013] For securing the guide pipe, the device employs multiple safeguards. The limiting baffle assembly is tightly connected to the limiting base, and the arc-shaped groove on the limiting baffle perfectly fits the outer wall of the guide pipe, effectively limiting horizontal displacement and preventing lateral swaying during construction. Simultaneously, the locking ring and pin in the locking mechanism work together, with the rubber gasket on the inner wall of the locking ring increasing friction with the guide pipe, making the locking effect more secure. The pin further ensures the stability of the locking ring, firmly fixing the guide pipe in the required position and ensuring its verticality. Furthermore, the combined design of the inner support rods and anti-overturning limiting rods on the base effectively prevents axial rotation and overturning of the limiting base during adjustment, further improving the stability and reliability of the entire device. During concrete pouring, even under significant lateral forces and vibrations, the device ensures the guide pipe remains stable, without shifting or swaying, thus guaranteeing the quality of the cast-in-place pile.

[0014] During construction, various reasons may necessitate adjustments to the position of the conduit or replacement with conduits of different specifications. The device of this invention offers high flexibility, enabling rapid adaptation to these changes. The conduit can be re-secured through simple adjustments without requiring the entire device to be reinstalled. This flexibility facilitates a smoother construction process and reduces inconvenience caused by conduit adjustments. Furthermore, the device employs a modular design, with components assembled via detachable connections. After project completion, the device can be easily disassembled and stored for reuse in subsequent projects. This reusability significantly reduces construction costs, improves resource utilization efficiency, and aligns with the requirements of sustainable development. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this application.

[0016] Figure 2 This is a schematic diagram of the limiting base.

[0017] Figure 3 This is a schematic diagram of the base.

[0018] Figure 4 This is a schematic diagram of the limit baffle assembly. Detailed Implementation

[0019] 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, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0020] Example 1 like Figure 1 As shown: A prefabricated adjustable concrete cast-in-place pile guide pipe fixing device includes a base 2, a limiting base 1, a limiting baffle assembly 3, an adjustment mechanism, and a locking mechanism; the base provides basic support and is fixedly connected to the ground at the borehole of the cast-in-place pile; the limiting base is movably mounted on the base through the adjustment mechanism to adapt to guide pipes of different diameters; the limiting baffle assembly is connected to the limiting base to limit the horizontal displacement of the guide pipe; the locking mechanism is mounted on the limiting baffle assembly to clamp the guide pipe and ensure its verticality; the overall device adopts a modular design, and the guide pipe is stably fixed through adjustment and locking.

[0021] The fixing device includes the following components: 1. Base 2: Provides foundation support for the device, allowing operators to stand, and is fixed to the ground at the opening of the grouting pile.

[0022] 2. Limiting baffle assembly 3: Limits the horizontal displacement of the guide tube, and the angle is adjustable.

[0023] 3. Limiting base 1: moves along the slide rail to adapt to different conduit diameters.

[0024] 4. Threaded rod 101: Adjusting the position of the limit base 5. Bolt 102: Fixing the limiting base.

[0025] 6. Spacer 103: Enhances connection stability.

[0026] 7. Hinge 104: Connects the limiting base and the limiting baffle for easy size adjustment.

[0027] 8. Anti-overturning limit rod 105: It is integrated with the limit base and is inserted into the limit hole of the inner support rod to prevent the limit base from axially rotating and overturning.

[0028] 9. Lifting ring 201: Facilitates the hoisting of the device.

[0029] 10. Slide rail 202: guides the movement of the limiting base.

[0030] 11. Internal support member 203: enhances the rigidity of the base.

[0031] 12. Locking ring 302: Clamps the tubing to ensure verticality.

[0032] The overall structure is modular, and a flexible fixing system is formed by adjusting the slide rails and threads.

[0033] like Figure 3 As shown, the base 2, serving as the fundamental support component of the entire device, is fixedly connected to the ground at the borehole opening of the cast-in-place pile via bolts or welding. This fixing method ensures the stability of the device during construction, preventing movement or shaking due to external factors and providing a reliable foundation for subsequent guide pipe fixing operations. Simultaneously, the base is equipped with a slide rail 202 and a lifting ring 201. The slide rail provides a track for the movement of the limiting base, allowing it to move linearly in a predetermined direction, thus achieving compatibility with guide pipes of different diameters. The lifting ring facilitates the hoisting and movement of the device. When the device needs to be moved on-site, it can be easily moved to the designated location by hooking the lifting ring with hoisting equipment, improving the flexibility and efficiency of construction. Furthermore, the base is also equipped with an inner support rod 203, which enhances the rigidity of the base, enabling it to withstand various external forces during construction and ensuring the overall structural stability of the device. Multiple limiting holes are provided on the inner support rod; these holes, in conjunction with anti-overturning limiting rods, prevent the limiting base from axially rotating and overturning during adjustment.

[0034] like Figure 2As shown: The limiting base 1 includes a threaded rod 101, a bolt 102, a pad 103, a hinge 104, and an anti-tipping limiting rod 105. One end of the threaded rod is fixedly connected to the main body of the limiting base, and the other end passes through a threaded hole on the base. By rotating the threaded rod, the position of the limiting base on the base can be precisely adjusted to adapt to the installation requirements of conduits of different diameters. This adjustment method is simple to operate, can quickly achieve position adjustment, and improves construction efficiency. The bolt is used to fix the limiting base after the position adjustment is completed, ensuring that the limiting base will not move due to external forces during construction, and ensuring the stability of the conduit fixation. The pad is set between the limiting base and the base, which can enhance the connection stability, disperse the pressure of the limiting base on the base, and avoid damage to the base due to excessive local stress. The hinge is used to connect the limiting base and the limiting baffle assembly to achieve angle adjustment, so that the limiting baffle assembly can better fit conduits of different angles and improve the limiting effect on the conduit. The anti-tipping limiting rod and the limiting base are integrated into one structure. When inserted into the limiting hole of the inner support rod on the base, it can effectively prevent the limiting base from axially rotating and tipping over during the adjustment process, thus further ensuring the stability and safety of the device.

[0035] like Figure 4 As shown: The limiting baffle assembly 3 includes a limiting baffle 301, a locking ring 302, and a pin. The limiting baffle is connected to the limiting base via a hinge and can rotate around the hinge axis to adjust the angle. Its side in contact with the conduit has an arc-shaped groove. This arc-shaped groove design allows for better contact with the outer wall of the conduit, increasing the contact area and improving the restriction effect on the horizontal displacement of the conduit, ensuring that the conduit does not sway left or right during construction. The locking ring is a structure of two semi-circular rings connected by a hinge, which can be opened and closed on the outside of the conduit. This openable design makes the installation and removal of the locking ring more convenient and quick, improving construction efficiency. The pin passes through the connecting holes at both ends of the locking ring, locking the locking ring onto the conduit and ensuring the verticality of the conduit. The head of the pin has a handle, allowing operators to quickly insert and remove the pin, enabling rapid opening and closing of the locking ring, further improving the convenience of construction.

[0036] The adjustment mechanism mainly consists of a threaded rod and a slide rail. The threaded rod, through rotation, precisely adjusts the position of the limiting base. Construction personnel can flexibly rotate the threaded rod according to the diameter of the conduit, moving the limiting base to the appropriate position to accommodate conduits of different diameters. The slide rail provides guidance for the movement of the limiting base, ensuring it moves along a predetermined straight line, avoiding deviation and jamming during movement, and improving the accuracy and stability of the adjustment.

[0037] The locking mechanism consists of a locking ring and a pin. A rubber gasket is installed on the inner wall of the locking ring. This gasket increases the friction between the locking ring and the guide tube, making the locking effect more secure and preventing damage to the guide tube during the locking process, thus protecting the quality of the guide tube. The pin is used to fix the locking ring. By inserting it into the connecting holes at both ends of the locking ring, the two semi-circular locking rings are tightly connected together, ensuring that the guide tube remains vertical during construction and will not tilt due to external forces, thus guaranteeing the construction quality of the cast-in-place pile.

[0038] Operating steps 1. Preparation: Confirm the diameter of the conduit and the construction environment, and check the integrity of the device components.

[0039] 2. Initial assembly: Place the base 2 on the ground at the opening of the grouting pile hole, insert the threaded rod 101 of the limiting base 1 into the slide rail 202, insert the anti-overturning limiting rod 105 into the limiting hole of the inner support bar 203, and connect the limiting baffle 2 and the limiting base 1 through the hinge 104.

[0040] 3. Connection and Adjustment: The sliding limiting base 1 moves the limiting baffle assembly 3 to the position where it fits against the outer wall of the conduit. Tighten bolt 102. 4. Fine-tuning and fixing: The limit baffle assembly 3 clamps the guide tube and checks its verticality. Once confirmed to be correct, the locking ring 302 inserts the pin. 5. Inspection: Confirm that the device is not loose, the guide pipe is securely fixed, and the pouring requirements are met.

[0041] Example 2 The base 2 of this device is welded from high-strength steel plates, and is rectangular in shape, with dimensions of 1200mm in length, 800mm in width, and 20mm in thickness, providing a stable foundation support. The base 2 is firmly fixed to the ground at the borehole opening of the cast-in-place pile using four M20 bolts, ensuring that the device will not move during construction. Simultaneously, the base 2 is equipped with slide rails 202, which are two parallel rectangular steel bars spaced 300mm apart, used to guide and limit the linear movement of the base 1.

[0042] The base 2 is also equipped with a lifting ring 201, which is a round steel with a diameter of 20mm, to facilitate the hoisting and movement of the device.

[0043] In addition, an inner support rod 203 is provided on the base 2. It is made of channel steel and is used to enhance the rigidity of the base 2. A limiting hole with a diameter of 25mm is opened on the inner support rod 203 every 100mm.

[0044] The limiting base 1 is also made of high-strength steel plate, and its bottom is provided with a sliding groove that cooperates with the slide rail 202 to realize linear movement along the slide rail 202.

[0045] The limiting base 1 includes a threaded rod 101, a bolt 102, a pad 103, a hinge 104, and an anti-tipping limiting rod 105. The threaded rod 101 is a 20mm diameter threaded rod, one end of which is fixedly connected to the main body of the limiting base 1, and the other end passes through a threaded hole on the base 2. By rotating the threaded rod 101, the position of the limiting base 1 on the base 2 can be precisely adjusted to accommodate conduits of different diameters.

[0046] Bolt 102 is an M16 hexagonal bolt used to fix the limiting base 1 after the position adjustment is completed.

[0047] The pad 103 is made of rubber and is 10mm thick. It is placed between the limiting base 1 and the base 2 to enhance the connection stability.

[0048] Hinge 104 is made of stainless steel and is used to connect the limiting base 1 and the limiting baffle assembly to achieve angle adjustment.

[0049] The anti-overturning limiting rod 105 is an integral structure with the limiting base 1, with a diameter of 20mm. It is inserted into the limiting hole of the inner support rod 203 on the base 2 to prevent the limiting base 1 from axially rotating and overturning.

[0050] The limiting baffle assembly 3 includes a limiting baffle 301, a locking ring 302, and a pin. The limiting baffle 301 is connected to the limiting base 1 via a hinge 104 and can rotate around the hinge axis to adjust its angle. The side of the baffle that contacts the conduit has an arc-shaped groove with a radius of 150mm, designed according to common conduit diameters, to fit snugly against the outer wall of the conduit. The locking ring 302 is a two-semi-circular ring structure made of high-strength alloy steel, connected by a hinge, and can be opened and closed around the conduit. The inner wall of the locking ring 302 is provided with a 5mm thick rubber gasket to increase friction with the conduit and prevent damage to the conduit during locking. The pin is a 10mm diameter round steel bar with a 100mm long handle at the head, facilitating quick insertion and removal of the pin by the operator to achieve rapid opening and closing of the locking ring 302.

[0051] In the actual construction process, the diameter of the conduit and the construction environment are first confirmed, and the integrity of the device components is checked.

[0052] Then, base 2 is placed on the ground at the opening of the cast-in-place pile and fixed to the construction platform with bolts.

[0053] Next, the threaded rod 101 of the limiting base 1 is inserted into the slide rail 202 of the base 2, the anti-overturning limiting rod 105 is inserted into the limiting hole of the inner support rod 203, and the limiting baffle 301 is connected to the limiting base 1 through the hinge 104.

[0054] Then slide the limiting base 1 to move the limiting baffle 301 to the position where it fits against the outer wall of the guide tube. Tighten the bolt 102 to fix the limiting base 1. Then put the locking ring 302 on the guide tube and insert the pin to lock it. Finally, confirm that the device is not loose and the guide tube is securely fixed to meet the pouring requirements.

[0055] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prefabricated adjustable concrete cast-in-place pile guide pipe fixing device, characterized in that: The system includes a base (2), a limiting base (1), a limiting baffle assembly (3), an adjustment mechanism, and a locking mechanism. The base (2) provides basic support and is fixedly connected to the ground at the borehole opening of the cast-in-place pile. The limiting base (1) is movably mounted on the base (2) through the adjustment mechanism to accommodate guide tubes of different diameters. The limiting baffle assembly is connected to the limiting base (1) and is used to limit the horizontal displacement of the guide tube. The locking mechanism is mounted on the limiting baffle assembly and is used to clamp the guide tube and ensure its verticality. The entire device adopts a modular design, and the catheter is securely fixed through adjustment and locking.

2. The prefabricated adjustable concrete cast-in-place pile guide pipe fixing device according to claim 1, characterized in that: The limiting base (1) includes a threaded rod (101), a bolt (102), a pad (103), a hinge (104), and an anti-tipping limiting rod (105); one end of the threaded rod (101) is fixedly connected to the main body of the limiting base (1), and the other end passes through a threaded hole on the base (2). The position of the limiting base (1) on the base (2) is adjusted by rotating the threaded rod (101); the bolt (102) is used for position adjustment. After completion, the fixed limiting base (1) is fixed; the pad (103) is set between the limiting base (1) and the base (2) to enhance the connection stability; the hinge (104) is used to connect the limiting base (1) and the limiting baffle assembly to realize angle adjustment; the anti-overturning limiting rod (105) is an integral structure with the limiting base (1) and is inserted into the limiting hole of the inner support rod (203) on the base (2) to prevent the limiting base (1) from axially rotating and overturning.

3. The prefabricated adjustable concrete cast-in-place pile guide pipe fixing device according to claim 1 or 2, characterized in that: The limiting baffle assembly (3) includes a limiting baffle (301), a locking ring (302), and a pin (303). The limiting baffle (301) is connected to the limiting base (1) via a hinge (104) and can rotate around the hinge axis to adjust the angle. The side of the baffle that contacts the conduit is provided with an arc-shaped groove to fit the outer wall of the conduit. The locking ring (302) is a structure of two semi-circular rings connected by a hinge and can be opened and closed and fitted onto the outside of the conduit. The pin (303) passes through the connecting holes at both ends of the locking ring (302) to lock the locking ring (302) onto the conduit and ensure the verticality of the conduit.

4. The prefabricated adjustable concrete cast-in-place pile guide pipe fixing device according to claim 3, characterized in that: The base (2) is provided with a slide rail (202), and the bottom of the limiting base (1) is provided with a slide groove that cooperates with the slide rail (202). Through the cooperation of the slide rail (202) and the slide groove, the limiting base (1) can move linearly on the base (2). The base (2) is also provided with a lifting ring (201) to facilitate the hoisting and movement of the device.

5. The prefabricated adjustable concrete cast-in-place pile guide pipe fixing device according to claim 4, characterized in that: The base (2) is fixedly connected to the ground at the hole of the grouting pile by bolts or welding to ensure the stability of the device during construction. The base (2) is also provided with an inner support rod (203) to enhance the rigidity of the base (2). The inner support rod (203) is provided with multiple limiting holes, which are used in conjunction with the anti-overturning limiting rod (105) to prevent the limiting base (1) from axially rotating and overturning during the adjustment process.

6. The prefabricated adjustable concrete cast-in-place pile guide pipe fixing device according to claim 5, characterized in that: The inner wall of the locking ring (302) is provided with a rubber gasket to increase the friction between it and the conduit and to prevent damage to the conduit during the locking process; the head of the pin (303) is provided with a handle to facilitate the operator to quickly insert and remove the pin (303) and realize the rapid opening and closing of the locking ring (302).

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