Pipe pile splicing positioning device and positioning method

Abstract

The invention provides a pipe pile splicing positioning device and a positioning method.The pipe pile splicing positioning device comprises a sleeve arranged on the outer side of a pipe pile head and an inter-pipe positioning mechanism, the inter-pipe positioning mechanism comprises a positioning platform, an outer supporting piece and an inner supporting piece, and the outer supporting piece is movably arranged on the positioning platform; the movable part can move in the direction close to or away from the sleeve so as to abut against the inner wall of the sleeve; the inner supporting piece is movably arranged on the positioning platform and can move in the direction close to or away from the pipe pile head so as to abut against the outer wall of the pipe pile head. By arranging the positioning platform, the inner supporting piece and the outer supporting piece, a force transmission system of the casing pipe, the outer supporting piece, the positioning platform, the inner supporting piece and the pipe pile head is formed, the overall force transmission path is simple, clear and reasonable, enough support can be provided for the casing pipe to resist the lateral pressure of the outer side soil body borne by the casing pipe, the casing pipe is prevented from deviating or inclining, and the construction efficiency is improved. And the construction quality of pile splicing is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction pile foundation engineering construction, and in particular relates to a pipe pile joint positioning device and a positioning method. Background Art

[0002] Prefabricated pipe piles are widely used in pile foundation construction due to their high strength, good impact resistance, certain penetration ability, high bearing capacity and fast construction progress. However, due to complex geology, large variation in the depth of the bearing stratum and other reasons, pipe pile over-driving phenomenon is likely to occur during pipe pile construction, and pile joint construction is required. When using the cast-in-place pile method for pile jointing, it is necessary to first excavate the soil at the position of the pipe pile to expose the pile head, then align the center of the casing for cast-in-place pile shaping with the center of the pipe pile, and then backfill and compact the soil to bury the casing in the soil; however, it is difficult to ensure uniform stress around the casing during this process, resulting in the casing being prone to deviation or tilt, and finally the formed pile joint position and verticality are difficult to meet the requirements. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a pipe pile joint positioning device and a positioning method, which solve the problem that the casing is prone to deviation or tilt during soil backfilling and compaction.

[0004] The technical solution adopted by the present invention is: a pipe pile joint positioning device, including a casing arranged outside the pile head of the pipe pile, the casing is coaxially arranged with the pile head of the pipe pile, and further includes an inter-pipe positioning mechanism for positioning the casing, and the inter-pipe positioning mechanism includes:

[0005] A positioning platform for placing on the upper part of the pile head of the pipe pile;

[0006] An outer support member movably arranged on the positioning platform and capable of moving towards or away from the casing to abut against the inner wall of the casing;

[0007] An inner support member movably arranged on the positioning platform and capable of moving towards or away from the pile head of the pipe pile to abut against the outer wall of the pile head of the pipe pile.

[0008] Further, the positioning platform has a positioning center, and a plurality of the outer support members and / or a plurality of the outer support members can move radially relative to the positioning center.

[0009] Further, the inner support member and the outer support member are evenly and alternately arranged on the positioning platform.

[0010] Further, the positioning platform includes a plurality of positioning limbs radially arranged relative to the positioning center, and the outer support member and the inner support member are respectively arranged on different positioning limbs.

[0011] Furthermore, the outer support member includes a fixing portion and a limiting portion. The fixing portion is movably arranged on the positioning limb and can move along the length direction of the positioning limb. One end of the fixing portion protrudes from the positioning limb, and the limiting portion is connected to the protruding end of the fixing portion.

[0012] Furthermore, the limiting portion extends along the axial direction of the pile head of the pipe pile.

[0013] Furthermore, the fixing portion is fixed to the upper end surface of the positioning limb by at least one fastener. The fastener includes a collar with an opening and a wrench arranged at the opening of the collar. The collar is sleeved on the fixing portion, and the wrench is used to adjust the tightness of the collar and lock the collar.

[0014] Furthermore, the inner support member includes a hoop, a locking member arranged at the opening of the hoop, and a stop block arranged at the opposite end of the locking member. The opening of the hoop faces upward and is sleeved on the limb plate, so that the stop block abuts against the outer wall of the pile head of the pipe pile below the positioning platform.

[0015] Furthermore, the cross-sectional shape of the positioning limb is square, and the hoop has an inner cavity matching this cross-sectional shape.

[0016] A pipe pile joint positioning method, using the pipe pile joint positioning device as described above, includes the following steps:

[0017] Dig out the pile head of the pipe pile and level the ground around the pile head of the pipe pile;

[0018] Place a casing outside the pile head of the pipe pile to align the axis of the casing with the axis of the pile head of the pipe pile;

[0019] Place a positioning platform on the upper part of the pile head of the pipe pile to align the center of the positioning platform with the center of the pile head of the pipe pile;

[0020] Adjust the position of the outer support member so that its stop block abuts tightly against the outer wall of the pile head of the pipe pile, and fix the outer support member;

[0021] Adjust the position of the inner support member so that its limiting portion abuts tightly against the inner wall of the casing, and fix the inner support member;

[0022] Backfill the soil outside the casing to the designed pile head elevation;

[0023] Remove the inter-pipe positioning mechanism and pour concrete;

[0024] Remove the casing.

[0025] The advantages and positive effects of the present invention are:

[0026] (1) The pipe - to - pipe positioning mechanism proposed in this application forms a force - transmission system of casing - outer support - positioning platform - inner support - pipe pile head by setting up a positioning platform, inner supports, and outer supports. The overall force - transmission path is concise, clear, and reasonable, enabling the pipe - to - pipe positioning mechanism to provide sufficient support to the casing to resist the lateral soil pressure on the outside of the casing, preventing the casing from shifting or tilting during the process of backfilling and tamping the soil outside the casing, and ensuring the construction quality of pile splicing.

[0027] (2) By setting multiple inner supports and / or multiple outer supports to move radially relative to the positioning center of the positioning platform, the positions of the inner supports and outer supports can be conveniently adjusted so that they respectively abut against the outer wall of the pipe pile head and the inner wall of the casing, and it can be applicable to scenarios with different pipe pile head diameters and different casing diameters, improving the application range of the device and reducing the construction cost.

[0028] (3) By setting positioning limbs and arranging the inner supports and outer supports evenly and alternately on the positioning platform, the circumferential force on the casing is more balanced, and the load can be evenly transmitted to the pipe pile head, ensuring the overall stability of the device.

[0029] (4) Using the pipe pile splicing positioning method proposed in this application, the position of the casing can be quickly and conveniently positioned. The overall structure is stable, easy to operate and control, and can effectively prevent the casing from shifting and tilting during the process of backfilling and tamping the soil, keeping the verticality of the casing always the same as that of the pipe pile head, thus ensuring the verticality of pile splicing and improving the construction quality of pile splicing. Brief Description of the Drawings

[0030] Figure 1 is a schematic structural view of a specific embodiment of the present invention;

[0031] Figure 2 is a schematic structural view of the pipe - to - pipe positioning mechanism of a specific embodiment of the present invention;

[0032] Figure 3 is a front view of the pipe - to - pipe positioning mechanism of a specific embodiment of the present invention;

[0033] Figure 4 is a schematic structural view of the fastener of a specific embodiment of the present invention;

[0034] Figure 5 is a front view of the inner support of a specific embodiment of the present invention;

[0035] Figure 6 is a side view of the inner support of a specific embodiment of the present invention;

[0036] Figure 7Schematic diagram of the positioning method of a specific embodiment of the present invention.

[0037] In the figure:

[0038] 1. Positioning platform; 11. Positioning limb; 2. Fastener; 21. Collar; 22. Wrench; 23. Pin nut; 24. Gasket; 25. Washer; 3. Outer support member; 31. Fixed part; 32. Limiting part; 4. Inner support member; 41. Ferrule; 42. Locking member; 43. Stopper; 5. Pipe pile head; 6. Sleeve. Specific embodiments

[0039] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0040] As Figures 1 to 3 shown, the present invention provides a pipe pile splicing positioning device, which includes a sleeve 6 arranged outside the pipe pile head 5. The sleeve 6 is coaxially arranged with the pipe pile head 5. The pipe pile splicing positioning device further includes an inter-pipe positioning mechanism for positioning the sleeve 6. The inter-pipe positioning mechanism includes:

[0041] A positioning platform 1 for being placed on the upper part of the pipe pile head 5;

[0042] An outer support member 3 movably arranged on the positioning platform 1 and capable of moving in a direction close to or away from the sleeve 6 to abut against the inner wall of the sleeve 6;

[0043] An inner support member 4 movably arranged on the positioning platform 1 and capable of moving in a direction close to or away from the pipe pile head 5 to abut against the outer wall of the pipe pile head 5.

[0044] In the embodiment of the present application, a pile splicing needs to be set on the upper part of the pile head 5 of the pipe pile. The casing 6 is a fixed formwork for the splicing concrete of the pile. The pipe positioning mechanism is used to fix the casing 6 at a set position outside the pile head 5 of the pipe pile. The positioning platform 1 in the present application is used to provide a setting basis for the inner support member 4 and the outer support member 3. By adjusting the position of the inner support member 4, the inner support member 4 can be made to abut against the outer wall of the pile head 5 of the pipe pile, so that the positioning platform 1 can be stably placed on the upper part of the pile head 5 of the pipe pile. By adjusting the position of the outer support member 3, the outer support member 3 can be made to abut against the inner wall of the casing 6. Through the cooperation of the positioning platform 1, the inner support member 4 and the outer support member 3, the casing 6 can be fixed relative to the positioning platform 1 and the pile head 5 of the pipe pile. When earthwork backfilling and ramming are carried out outside the casing 6, the outer wall of the casing 6 is subjected to the lateral pressure of the soil body, and the pressure is sequentially transmitted to the outer support member 3, the positioning platform 1 and the inner support member 4, and finally transmitted to the pile head 5 of the pipe pile. The overall force transmission path is concise, clear and reasonable, so that the pipe positioning mechanism can provide sufficient support for the casing 6 to resist the lateral pressure of the outer soil body on the casing 6, so that its axis always remains aligned with the axis of the pile head 5 of the pipe pile, avoiding the casing 6 from shifting or tilting during the process of earthwork backfilling and ramming outside the casing 6, resulting in the situation that the position of the pile splicing is offset or the verticality does not meet the requirements, and ensuring the construction quality of the pile splicing.

[0045] In the embodiment of the present application, the positioning platform 1 is arranged on the upper part of the pile head 5 of the pipe pile, and its lower end surface is in contact with the top end surface of the pile head 5 of the pipe pile. To ensure the stability of the positioning platform 1, the lower end surface of the positioning platform 1 is designed in a flat structure form. The size of the positioning platform 1 is preferably larger than the inner diameter of the pile head 5 of the pipe pile, and has enough space for the inner support member 4 and the outer support member 3 to move, so as to meet the requirement of adjusting the positions of the inner support member 4 and the outer support member 3 for adjustment. Its specific shape is not required here.

[0046] In a preferred technical solution of the embodiment of the present application, the positioning platform 1 has a positioning center, and a plurality of inner support members 4 and / or a plurality of outer support members 3 can move radially relative to the positioning center. Since the cross-sectional shapes of the pile head 5 of the pipe pile and the casing 6 are circular rings, by setting the positioning center and the moving directions of the inner support member 4 and / or the outer support member 3, it is convenient for the operator to align the positioning center of the positioning platform 1 with the positioning center of the pile head 5 of the pipe pile, so as to ensure that the positioning center of the positioning platform 1, the pile head 5 of the pipe pile and the axis of the casing 6 are aligned. And this setting makes the plurality of inner support members 4 abutting against the outer wall of the pile head 5 of the pipe pile and the plurality of outer support members 3 abutting against the inner wall of the casing 6 are all arranged around the positioning center, improving the balance of the force on the positioning platform 1 and being beneficial to improving the stability of the overall structure.

[0047] Further, on the basis of the above embodiments, the inner support member 4 and the outer support member 3 are uniformly and alternately arranged on the positioning platform 1; that is to say, both the inner support member 4 and the outer support member 3 are circumferentially and uniformly arranged relative to the positioning center of the positioning platform 1, and the inner support member 4 and the outer support member 3 are alternately arranged in sequence. Preferably, there is the same spacing between adjacent inner support members 4 and outer support members 3. Through the above technical solution, it can be ensured that all parts of the sleeve 6 in the circumferential direction are evenly supported by the outer support member 3, and the load can be evenly transmitted to the pile head 5 of the pipe pile through the positioning platform 1 and the inner support member 4, further improving the force balance and stability of the overall structure; at the same time, the positions of the inner support member 4 and the outer support member 3 are staggered to ensure that they can respectively move radially relative to the positioning center, improving the possibility of process implementation and the convenience of processing and manufacturing.

[0048] In the embodiment of the present application, as Figure 1 shown, the positioning platform 1 includes a plurality of positioning limbs 11 radially arranged relative to the positioning center. The outer support member 3 and the inner support member 4 are respectively arranged on different positioning limbs 11 and they have the same number. The number of the above-mentioned positioning limbs 11 is the same as the sum of the numbers of the outer support member 3 and the inner support member 4. There is an outer support member 3 or an inner support member 4 arranged on each positioning limb 11. To ensure the uniform distribution of the inner support member 4 and the outer support member 3, the number of the positioning limbs 11 is an even number. Preferably, the number of the positioning limbs 11 is more than four, and its specific number can be set as required and will not be limited here. By arranging the positioning limbs 11, the outer support member 3 and the inner support member 4 can be conveniently installed, and the positions of the two can be more conveniently adjusted and observed.

[0049] In a specific embodiment, the positioning platform 1 includes six positioning limbs 11 radially arranged relative to the positioning center. The six positioning limbs 11 are centrosymmetric with respect to the positioning center. Among them, three positioning limbs 11 are provided with inner support members 4, and the other three positioning limbs 11 are provided with outer support members 3, and the inner support members 4 and the outer support members 3 are alternately arranged; the centers of the inner support members 4 and the outer support members 3 are set to be aligned with the midlines of the positioning limbs 11 to ensure that the inner support members 4 and the outer support members 3 are uniformly arranged relative to the positioning center.

[0050] Further, in the embodiment of the present application, as Figures 1 to 4As shown in the figure, the outer support member 3 includes a fixing portion 31 and a limiting portion 32. The fixing portion 31 is movably arranged on the positioning limb 11 and can move along the length direction of the positioning limb 11; one end of the fixing portion 31 protrudes from the positioning limb 11, and the limiting portion 32 is connected to the protruding end of the fixing portion 31. In this application, the fixing portion 31 is used to connect with the positioning limb 11. Preferably, the length direction of the fixing portion 31 is arranged in the same direction as the length direction of the positioning limb 11, and the midline of the fixing portion 31 is aligned with the midline of the positioning limb 11. The fixing portion 31 can move along the length direction of the positioning limb 11 and drive the limiting portion 32 connected to the protruding end of the fixing portion 31 to move towards or away from the positioning limb 11. With this technical solution, by adjusting the position of the fixing portion 31 on the positioning limb 11, the length of the fixing portion 31 protruding from the positioning limb 11 can be adjusted, so as to realize the adjustment of the position of the limiting portion 32, ensuring that the limiting portion 32 abuts against the inner wall of the sleeve 6.

[0051] In the above embodiment, one end of the positioning limb 11 is connected to the positioning center, and the other end extends towards the outside of the outer wall of the pipe pile. There is a set distance between its end and the inner wall of the sleeve 6 to accommodate the movement of the limiting portion 32 within this distance. This setting not only facilitates the operator to adjust the position of the limiting member to ensure that the limiting portion 32 can tightly abut against the inner wall of the sleeve 6, enabling the sleeve 6 to be effectively supported; but also enables the outer support member 3 to be used to support sleeves 6 with different diameters, expanding the applicable range of this device.

[0052] Furthermore, in a preferred embodiment, as Figure 1 、 Figure 7 shown, the limiting portion 32 extends along the axial direction of the pipe pile head 5; that is to say, the limiting portion 32 has a set length along the axis direction of the pipe pile head 5. When the limiting portion 32 abuts against the inner wall of the sleeve 6, there is sufficient contact area between the limiting portion 32 and the length direction of the inner wall of the sleeve 6, so that the limiting portion 32 can form an effective support for the inner wall of the sleeve 6. On the other hand, this setting can also be used as a basis for judging the verticality of the sleeve 6. Since the pipe pile head 5 is arranged in the vertical direction, setting the length direction of the limiting portion 32 to be the same as that of the pipe pile head 5, the verticality, inclination direction or offset direction of the sleeve 6 can be judged by the contact situation between different parts of the length direction of the limiting portion 32 and the inner wall of the sleeve 6.

[0053] In a specific embodiment, the fixing portion 31 and the limiting portion 32 are made of round steel pipes to form a T-shaped structure, and the fixing portion 31 is vertically connected to the middle of the limiting portion 32.

[0054] In the above embodiments, the fixing portion 31 is fixed to the upper end surface of the positioning limb 11 by at least one fastener 2. The fastener 2 includes a collar 21 having an opening and a wrench 22 disposed at the opening of the collar 21. The collar 21 is sleeved on the fixing portion 31, and the wrench 22 is used to adjust the tightness of the collar 21 and lock the collar 21. Preferably, the fixing portion 31 has a circular cross-section. The shape and size of the sleeve 6 match those of the fixing portion 31. One end of the sleeve 6 is fixed to the upper end surface of the positioning limb 11. The opening position of the collar 21 can face any direction that facilitates the operator to adjust the wrench 22. By adjusting the wrench 22, the tightness between the collar 21 and the fixing portion 31 can be adjusted, so as to facilitate adjusting the position of the fixing portion 31 by loosening the fastener 2, making the limiting portion 32 abut against the inner wall of the sleeve 6, and fixing the fixing portion 31 on the positioning limb 11 by tightening the fastener 2. The wrench 22 also has a locking function, which can ensure the stable connection between the fixing portion 31 and the positioning limb 11.

[0055] In an alternative technical solution of this embodiment, as Figure 4 shown, the fastener 2 adopts a form of a quick-lock hoop, which specifically includes a collar 21, a pin nut 23, a gasket 24, a washer 25, a rotating shaft and a wrench 22. Locking lugs are respectively arranged on both sides of the opening of the collar 21, and through holes are arranged on the locking lugs. One end of the wrench 22 is provided with a screw rod, and the screw rod passes through the through holes of the two locking lugs. The pin nut 23 is installed at the other end of the screw rod, and the screw rod is connected to the wrench 22 through the rotating shaft; a friction-reducing gasket 24 and washer 25 are installed between the wrench 22 and the locking lug; the wrench 22 has a fitting surface that matches the outer wall shape of the sleeve 6; by rotating the wrench 22, the screw rod can be driven to rotate to realize the tightening or loosening of the collar 21, and by moving the wrench 22, its fitting surface can be turned to the vicinity of the outer wall of the collar 21 to realize the locking of the collar 21.

[0056] Furthermore, in the embodiments of the present application, as Figures 5 to 6 shown, the inner support member 4 includes a hoop 41, a locking member 42 disposed at the opening of the hoop 41, and a stop block 43 disposed at the opposite end of the opening. The opening of the hoop 41 faces upward and is sleeved on the limb plate, so that the stop block 43 abuts against the outer wall of the pipe pile head 5 below the positioning platform 1.

[0057] In the above embodiments, one end of the positioning limb 11 is connected to the positioning center, and the other end extends outward to the outside of the pipe pile outer wall. There is a set distance between its end and the outer wall of the pipe pile head 5 to accommodate the movement of the stop block 43 within this distance. This setting not only facilitates the operator to adjust the position of the stop block 43 to ensure that the stop block 43 can tightly abut against the outer wall of the pipe pile head 5, making the positioning platform 1 firmly fixed on the pipe pile head 5; but also enables the inner support member 4 to be used to abut against pipe pile heads 5 with different diameters, expanding the application range of this device.

[0058] Specifically, in the above embodiment, the cross-sectional shape of the positioning limb 11 is square, and the ferrule 41 has an inner cavity matching this cross-section. During use, the ferrule 41 is sleeved on the positioning limb 11 from the end of the positioning limb 11, with the opening of the ferrule 41 facing upward and the stop block 43 located below the positioning platform 1. By adjusting the position of the ferrule 41 in the length direction of the positioning limb 11, the stop block 43 can be driven to approach or move away from the outer wall of the pipe pile head 5, enabling the stop block 43 to tightly press against the outer wall of the pipe pile head 5, forming a tight contact with the outer wall of the pipe pile head 5 to achieve the transfer of the load to the pipe pile head 5; the locking member 42 can fix the ferrule 41 at a set position on the positioning limb 11 by locking the opening; preferably, the contact surface of the stop block 43 with the pipe pile head 5 has a length along the axial direction of the pipe pile head 5, so that the length direction of the stop block 43 fits the outer wall of the pipe pile head 5, which is conducive to ensuring that the verticality of the overall device is consistent with that of the pipe pile head 5, facilitating further control of the verticality of the limiting portion 32 and the casing 6.

[0059] In a specific embodiment, the stop block 43 is designed as a triangular structure, and its end face facing the positioning center is perpendicular to the lower surface of the positioning platform 1.

[0060] The second aspect of this application also proposes a method for positioning pipe pile splicing, using the pipe pile splicing positioning device proposed in this application, as Figure 7 shown, including the following steps:

[0061] S1. Excavate the pipe pile head 5 and level the ground around the pipe pile head 5;

[0062] Specifically, a pile hole capable of accommodating the casing 6 is dug around the pipe pile head 5. This pile hole is excavated with the pipe pile head 5 as the center, and the pipe pile head 5 is exposed on the ground by a set length, which is set according to the designed connection length between the pipe pile and the spliced pile. Subsequently, the soil at the bottom of the pile hole is leveled to meet the set requirements.

[0063] S2. Place the casing 6 outside the pipe pile head 5 so that the axis of the casing 6 is aligned with the axis of the pipe pile head 5;

[0064] Specifically, the casing 6 is lifted into the dug pile hole by a hoisting device and sleeved outside the pipe pile head 5, and the position of the casing 6 is adjusted so that the axis of the casing 6 is aligned with the axis of the pipe pile head 5.

[0065] S3. Place the positioning platform 1 on the upper part of the pipe pile head 5 so that the center of the positioning platform 1 is aligned with the center of the pipe pile head 5;

[0066] Specifically, before placing the positioning platform 1 on the upper part of the pipe pile head 5, adjust the inner support member 4 to one end of the positioning limb 11 so that the space between the inner support members 4 is sufficient to enclose the pipe pile head 5 inside, and adjust the position of the positioning platform 1 so that the center of the positioning platform 1 is aligned with the center of the pipe pile head 5.

[0067] S4. Adjust the position of the inner support member 4 so that its limiting portion 32 abuts against the inner wall of the sleeve 6, and fix the inner support member 4;

[0068] Specifically, after adjusting the position of the positioning platform 1 so that its center is aligned with the center of the pipe pile head 5, move the inner support member 4 in the direction close to the pipe pile head 5. When one end of the stop block 43 abuts against the outer wall of the pipe pile head 5, lock and fix the inner support member 4 through the locking member 42; adjust the position of the inner support member 4 one by one according to the above method until all the inner support members 4 abut against the outer wall of the pipe pile head 5, and the positioning platform 1 is firmly fixed on the pipe pile head 5.

[0069] S5. Adjust the position of the outer support member 3 so that its stop block 43 abuts against the outer wall of the pipe pile head 5, and fix the outer support member 3;

[0070] Specifically, after fixing the positioning platform 1 through the inner support member 4, loosen the wrench 22 for fixing the outer support member 3, and move the fixing portion 31 in the direction away from the center of the positioning platform 1. When the limiting portion 32 abuts against the inner wall of the sleeve 6, lock the fixing portion 31 through the wrench 22; adjust the position of the outer support member 3 in turn according to the above method until all the outer support members 3 abut against the inner wall of the sleeve 6, forming a stable support for the sleeve 6.

[0071] S6. Backfill the soil outside the sleeve 6 to the designed pile head elevation;

[0072] After the backfilling is completed, compact the soil;

[0073] S7. Remove the inter-pipe positioning mechanism and pour concrete;

[0074] Specifically, after the backfilling and compaction operations are completed, loosen the outer support member 3 through the wrench 22, and then loosen the inner support member 4 by adjusting the locking member 42. Adjust the positions of the outer support member 3 and the inner support member 4 in turn so that they leave the inner wall of the sleeve 6 and the outer wall of the pipe pile head 5 respectively, and then remove the inter-pipe positioning mechanism, and then the pouring of the pile connection concrete can be carried out.

[0075] S8. Remove the sleeve 6.

[0076] When the pile connection concrete reaches the designed strength requirement, remove the sleeve 6, and the sleeve 6 and the inter-pipe positioning mechanism can be moved to the next position where pile connection construction is required for use.

[0077] By adopting the above pipe pile joint positioning method, the position of the casing can be quickly and conveniently positioned. The overall structure is stable, easy to operate and control, and can effectively prevent the casing from shifting and tilting during the process of earthwork backfilling and compaction, so that the verticality of the casing always remains the same as that of the pipe pile head, thus ensuring the verticality of the joint and improving the construction quality of the joint.

[0078] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A pipe pile connection and positioning device, comprising a sleeve arranged outside a pipe pile head, wherein the sleeve is coaxially arranged with the pipe pile head, and characterized in that: It also includes an inter-tube positioning mechanism for positioning the sleeve, and the inter-tube positioning mechanism includes: A positioning platform, used for being placed on the upper part of the pipe pile head; An outer support member is movably disposed on the positioning platform and can move toward or away from the sleeve to abut against the inner wall of the sleeve; The inner support member is movably arranged on the positioning platform and can move toward or away from the pipe pile head to abut against the outer wall of the pipe pile head.

2. The pipe pile connection and positioning device according to claim 1, characterized in that: The positioning platform has a positioning center, and the plurality of outer supports and / or the plurality of outer supports can move radially relative to the positioning center.

3. The pipe pile connection and positioning device according to claim 2, characterized in that: The inner support members and the outer support members are evenly and alternately arranged on the positioning platform.

4. The pipe pile connection and positioning device according to any one of claims 1 to 3, characterized in that: The positioning platform includes a plurality of positioning limbs radially arranged relative to the positioning center, and the outer support member and the inner support member are respectively arranged on different positioning limbs.

5. The pipe pile connection and positioning device according to claim 4, characterized in that: The outer support member includes a fixing portion and a limiting portion. The fixing portion is movably arranged on the positioning limb and can move along the length direction of the positioning limb. One end of the fixing portion protrudes from the positioning limb, and the limiting portion is connected to the protruding end of the fixing portion.

6. The pipe pile connection and positioning device according to claim 5, characterized in that: The limiting portion extends along the axial direction of the pile head.

7. The pipe pile connection and positioning device according to claim 5 or 6, characterized in that: The fixing part is fixed to the upper end surface of the positioning limb by at least one fastener, and the fastener includes a ring with an opening and a wrench arranged at the opening of the ring. The ring is sleeved on the fixing part, and the wrench is used to adjust the tightness of the ring and lock the ring.

8. The pipe pile connection and positioning device according to claim 4, characterized in that: The inner support member includes a hoop, a locking member arranged at the opening of the hoop and a stopper arranged at the opposite end of the locking member. The opening of the hoop is upwardly sleeved on the limb plate so that the stopper abuts against the outer wall of the pile head below the positioning platform.

9. The pipe pile connection and positioning device according to claim 8, characterized in that: The cross-sectional shape of the positioning limb is a square, and the sleeve has an inner cavity matching the cross-sectional shape.

10. A method for positioning a pipe pile connection, characterized in that: The pipe pile connection and positioning device according to any one of claims 1 to 9 comprises the following steps: Digging out the pile heads, and leveling the ground around the pile heads; Placing a sleeve outside the pile head so that the sleeve is aligned with the axis of the pile head; Placing a positioning platform on the upper part of the pipe pile head so that the center of the positioning platform is aligned with the center of the pipe pile head; Adjust the position of the outer support member so that its stopper is pressed against the outer wall of the pile head, thereby fixing the outer support member; Adjust the position of the inner support member so that its limiting portion is pressed against the inner wall of the sleeve, thereby fixing the inner support member; Backfilling the soil outside the casing to the designed pile head elevation; Remove the inter-tube positioning mechanism and pour concrete; The cannula is removed.

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