Adjustable guide limiting stopper for planting socketed pile and pile planting process of adjustable guide limiting stopper

Abstract

The invention discloses an adjustable guide limiting stopper for planting a socketed pile and a pile planting process. The guide limiting stopper is composed of N limiting assemblies and N anchor chain assemblies. The limiting assembly comprises a foundation ring capable of being oppositely opened, the multiple adjusting devices are evenly distributed on the annular outer wall of the foundation ring in the circumferential direction of the foundation ring in a radial shape, and the multiple inner sliding assemblies are evenly distributed in multiple inner sliding assembly mounting grooves in the annular inner wall of the foundation ring. The outer sliding assemblies are fixed to the outer side ends of the adjusting devices correspondingly, and the distances between the outer sliding assemblies and the foundation ring are adjusted through the adjusting devices. The N limiting assemblies are coaxially arranged at intervals from top to bottom, and the N anchor chain assemblies are arranged above the limiting assemblies correspondingly so as to connect the adjacent limiting assemblies or the limiting assemblies and a crane lifting hook. The guide limiting stopper is suitable for the adjusting requirement of different deviation conditions of the pile casing and the designed pile position of the engineering pile, precision control over the perpendicularity and the plane position of the engineering pile is achieved, the construction time and cost are saved, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rock-embedded pile construction, and in particular to an adjustable guide stopper for rock-embedded pile planting and a pile planting process thereof. Background Art

[0002] With the development of our society, the development of docks, cross-sea bridges, offshore drilling platforms, and offshore wind power, more and more pile foundation constructions are connected to deep water and deep sea areas, but the geological conditions of such sea areas are often complex, with relatively thin cover layers and exposed bedrock. In geological conditions with thin cover layers and large bedrock slopes, in order to solve the problems of foundation tensile resistance, bending resistance, and load-bearing effects in structures, prefabricated rock-embedded piles and other rock-embedded pile types have been increasingly developed and applied. Prefabricated rock-embedded piles mostly involve the process of lowering piles, which requires high control of the verticality and plane position of the pile position, especially the three-pile, four-pile, and multi-pile jacket foundation forms that require jackets to be placed on the upper part. The verticality and plane position of the relative positions of the rock-embedded piles under the same foundation are required to be higher. In the traditional construction process, during the lowering of engineering piles and grouting, there will be different degrees of deviation in the verticality and pile position, which will affect the construction quality. Summary of the invention

[0003] The object of the present invention is to provide an adjustable guide stopper for rock-embedded piles, which can solve the problems of verticality difference and plane deviation in the prior art during the lowering and grouting of piles.

[0004] Another object of the present invention is to provide a pile planting process using an adjustable guide stopper for rock-embedded pile planting.

[0005] To this end, the technical solution of the present invention is as follows:

[0006] An adjustable guide stopper for rock-embedded pile planting, comprising N stopper assemblies and N sets of anchor chain assemblies;

[0007] Each limiting assembly includes a plurality of adjustment devices, a plurality of inner sliding assemblies and a plurality of outer sliding assemblies arranged on a base ring; the base ring is a horizontally arranged circular ring body, which is formed by abutting and connecting two arc-shaped semi-ring bodies; a plurality of adjustment devices are evenly arranged in a radial manner along the circumferential direction of the base ring, and each adjustment device includes a jack, which is arranged with the piston end facing outward and is vertically fixed to the annular outer wall of the base ring through the cylinder end; a plurality of inner sliding assemblies are respectively arranged in a plurality of inner sliding assembly mounting grooves evenly arranged on the annular inner wall of the base ring, and each inner sliding assembly includes an inner roller that can rotate along the axial direction of the base ring, and the inner roller is arranged in a manner of partially protruding to the outside of the inner sliding assembly mounting groove so as to be able to roll in contact with the outer wall of the engineering pile; a plurality of outer sliding assemblies are respectively fixed on the end faces of the jack pistons of the plurality of adjustment devices in a one-to-one correspondence, and each outer sliding assembly includes an outer roller that can rotate along the axial direction of the base ring, and the outer roller can roll in contact with the inner wall of the casing;

[0008] N limit assemblies are coaxially and spaced from top to bottom, and N sets of anchor chain assemblies are respectively arranged above each limit assemblies; each set of anchor chain assemblies is composed of a number of connecting anchor chains evenly distributed along the circumferential direction of the limit assemblies, and the bottom end of each connecting anchor chain is connected to the top surface of the base ring of the lower limit assemblies, and the top end thereof is connected to the bottom surface of the base ring of the upper limit assemblies or to the hook.

[0009] Furthermore, the two arcuate semi-ring bodies are connected by plug-in connectors arranged at both ends thereof; the plug-in connector includes an insert block arranged at one end of the arcuate semi-ring body and a slot arranged at the other end of the arcuate semi-ring body, and the insert block matches the slot, so that the adjacent ends of the two arcuate semi-ring bodies form a plug-in connection through the matching insert block and slot; a plurality of one-to-one corresponding through holes are evenly distributed on the groove walls on both sides of the insert block and the slot, so that the insert block and the slot of the plug-in connection can be detachably connected and fixed by a plurality of fixing pins respectively inserted into four groups of intersecting through holes.

[0010] Furthermore, the inner diameter of the foundation ring is larger than the diameter of the pile hole of the engineering pile.

[0011] Furthermore, the outer sliding component also includes an outer roller shaft and an outer roller mounting seat; the outer roller mounting seat is a U-shaped mounting seat composed of a base plate and two side plates symmetrically fixed on one side of the base plate, and the two side plates are symmetrically provided with intersecting outer roller shaft holes, and the other side of the base plate is fixed on the piston end face of the jack; the outer roller is a drum structure, which is provided with a central axial through hole, so that the outer roller can be rotatably mounted on the outside of the outer roller shaft, and the two ends of the outer roller shaft are passed through and fixed in the two outer roller shaft holes on the outer roller mounting seat.

[0012] Furthermore, the outer roller is an outwardly convex roller whose outer diameter gradually decreases from the middle to both ends, and the curvature of its outer wall in its axial direction is adapted to the curvature of the inner wall of the casing, so that the outer roller can roll back and forth along the axial direction of the casing in a manner that fits the inner wall of the casing.

[0013] Furthermore, the inner sliding component also includes an inner roller shaft; the inner roller is a roller structure, on which a central axial through hole is opened, so that the inner roller can be rotatably mounted on the outside of the inner roller shaft, and the two ends of the outer side of the inner roller shaft are fixed on the opposite side groove walls in the horizontal direction in the inner sliding component installation groove.

[0014] Furthermore, the inner roller is an inwardly concave roller whose outer diameter gradually increases from the middle to both ends, and the curvature of its outer wall in its axial direction is adapted to the curvature of the outer wall of the engineering pile, so that the inner roller can roll back and forth along the axial direction of the engineering pile in a manner that fits the outer wall of the engineering pile.

[0015] Furthermore, the spacing distance between two adjacent limiting components in the axial direction is 15 cm to 25 cm.

[0016] Furthermore, a plurality of connecting ears are evenly distributed along the circumferential direction on the top and bottom surfaces of the base ring of each limiting assembly, and the number of the connecting ears is consistent with the number of connecting anchor chains in each set of anchor chain assemblies; shackles are provided at both ends of each connecting anchor chain, so that the end of each connecting anchor chain can be detachably connected to the connecting ear through the shackle.

[0017] A pile planting process using the above-mentioned adjustable guide limiter for rock-embedded pile planting, the steps are: 1) setting up a working platform, 2) measuring and placing pile positions, 3) lowering casing, 4) rock-embedded drilling, 5) air lift reverse circulation hole cleaning, 6) pile planting, 7) grouting, 8) removing and recovering the guide limiter; wherein the specific implementation steps of pile planting are: before pile planting, the number of guide limiters to be used is determined according to the pile length, so that the spacing between adjacent guide limiter components is 15m-20m, and the guide limiters are assembled on site; the guide limiter is sleeved on the outside of the engineering pile, and according to the deviation of the actual lowering position of the casing from the designed pile position in the circumferential direction, the stroke of each jack is adjusted to correct the deviation by using the guide, so as to ensure that the engineering pile is lowered to the designed pile position; then, the engineering pile and the guide limiter are lifted at the same time, and lowered along with the engineering pile until the engineering pile is lowered to the designed elevation.

[0018] Compared with the prior art, the adjustable guide limiter for rock-embedded piles solves the problems of verticality difference and plane deviation during the lowering and grouting of piles in the prior art. It utilizes multiple limit assemblies arranged at axial intervals from top to bottom and connected by anchor chain assemblies. It can be suitable for the adjustment needs of different deviations of the designed pile positions of the casing and the engineering piles, realizes precise control of the verticality and plane position of the engineering piles, saves construction time and cost, and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a limiter assembly of an adjustable guide limiter for rock-embedded piles in an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the limit assembly and the connecting part of the anchor chain of the adjustable guide limiter for rock-embedded piles in an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the split structure of the base ring of the adjustable guide stopper for rock-embedded piles in an embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of an adjusting device connected to an outer sliding component on an adjustable guide stopper for rock-embedded pile planting in an embodiment of the present invention;

[0023] Figure 5 It is a schematic structural diagram of an adjustable guide stopper for rock-embedded pile planting in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0025] See also Figure 5 The adjustable guide limiter for rock-embedded pile planting is composed of two limit assemblies and two sets of anchor chain assemblies.

[0026] See also Figure 1 Each limiting assembly includes four adjusting devices, four inner sliding assemblies 7 and four outer sliding assemblies 6 arranged on a base ring 1.

[0027] See also Figure 3 The foundation ring 1 is a horizontally arranged circular ring body, which is formed by a left arc-shaped semi-ring body 101 and a right arc-shaped semi-ring body 102 being aligned and connected; the inner diameter of the foundation ring 1 is slightly larger than the hole diameter of the engineering pile, so that the foundation ring 1 can be sleeved on the outside of the engineering pile in actual pile construction.

[0028] The left arcuate semi-ring body 101 and the right arcuate semi-ring body 102 are connected by means of plug-in connectors 2 arranged at both ends thereof; specifically, one end of each arcuate semi-ring body is provided with an insert block 201, and the other end is provided with a slot 202 matching the insert block, so that the adjacent ends of the two arcuate semi-ring bodies are plug-in connected through the matching insert block 201 and the slot 202; four one-to-one corresponding through holes are evenly distributed on the groove walls on both sides of the insert block 201 and the slot 202, so that the insert block 201 and the slot 202 of the plug-in connection can be detachably connected and fixed by four fixing pins 3 respectively penetrated through four groups of intersecting through holes; preferably, the groove walls on both sides of the slot 202 are respectively arranged on the top surface of the base ring 1.

[0029] See also Figure 1 , four adjustment devices are evenly arranged radially along the circumference of the base ring 1; specifically, see Figure 4 The adjusting device includes a jack 5, a cylinder end of which is vertically fixed to the annular outer wall of the base ring 1 through a connecting plate 4, so that its piston end is arranged to face outward; in this embodiment, the cylinder of the jack 5 is vertically fixed to one side plate surface of the connecting plate 4 by welding, and the other side plate surface of the connecting plate 4 is fixed to the base ring 1 by welding.

[0030] See also Figure 1 The four outer sliding components 6 are fixed one by one on one side of the jack piston ends of the four adjusting devices, so that the outer sliding components 6 can be driven to move in the radial direction of the base ring 1 through the jack 5 of the adjusting device to adjust the distance from the outer sliding component 6 to the base ring 1.

[0031] See also Figure 4 The outer sliding component 6 includes an outer roller mounting seat 603 and an outer roller 604. The outer roller mounting seat 603 is a U-shaped mounting seat composed of a bottom plate and two side plates symmetrically fixed on one side of the bottom plate. The two side plates are symmetrically provided with intersecting outer roller shaft holes 601; the outer roller 604 is a roller structure, on which a central axial through hole is provided; the outer roller shaft rod 602 is rotatably inserted into the central axial through hole of the outer roller 604, and its two ends are inserted and fixed in two outer roller shaft holes 601 symmetrically opened on the outer roller mounting seat 603, so that the outer roller 604 can rotate freely on the outer roller mounting seat 603; the outer roller mounting seat 603 of each outer sliding component 6 is welded and fixed to the piston end face of the jack 5 through its bottom plate, and the outer roller 604 thereon is installed on the outer roller mounting seat 603 in a manner that its axial direction is horizontally arranged.

[0032] In this embodiment, the outer roller 604 is preferably an outwardly convex roller whose outer diameter gradually decreases from the middle to both ends, and the curvature of the outer wall of the outer roller 604 in its axial direction is adapted to the curvature of the inner wall of the casing, so that the outer roller 604 can roll against the inner wall of the casing.

[0033] In the actual rock-embedded pile construction, there will be a plane deviation between the center point of the actual lowering position of the casing and the center point of the designed pile position. Therefore, the above-mentioned deviation problem can be overcome by matching the adjusting device with the outer sliding component. Specifically, when the limit assembly is sleeved on the outside of the engineering pile through the foundation ring 1, the elongation length of the jack in the adjusting device arranged on the circumference of the foundation ring 1 is adjusted according to the deviation between the casing and the designed pile position. Since the elongation lengths of the jacks are different, when the foundation ring 1 is sleeved in the casing and the foundation ring 1 is pressed against the inner wall of the casing through the outer sliding components, the center point of the foundation ring 1 is coincident with the center point of the designed pile position, so as to realize the guiding positioning of the subsequent lowering of the engineering pile by the foundation ring 1, and ensure that the engineering pile inserted in the foundation ring 1 is lowered to the designed pile position with the foundation ring 1; each outer sliding component is in sliding contact with the inner wall of the casing to ensure the smooth lowering of the guide limiter and the engineering pile.

[0034] See also Figure 1 The four inner sliding components 7 are evenly distributed along the circumferential direction of the base ring 1, and are respectively installed in four inner sliding component installation grooves 702 opened on the annular inner wall of the base ring 1. In this embodiment, the four inner sliding component installation grooves are composed of two inner sliding component installation grooves opened on the arc-shaped inner walls of the left arc-shaped semi-ring body 101 and the right arc-shaped semi-ring body 102, respectively. On each arc-shaped semi-ring body, the two inner sliding component installation groove groups are symmetrically opened to ensure the balance of the arc-shaped semi-ring body in structural design.

[0035] Specifically, each inner sliding component 7 includes an inner roller 704, whose size is adapted to the size of the inner sliding component mounting groove 702; a central axial through hole is opened on the inner roller 704, and an inner roller shaft rod 701 is passed through the central axial through hole, so that the inner roller 704 can rotate freely relative to the inner roller shaft rod 701; the two ends of the inner roller shaft rod 701 are fixed on the groove wall of the inner sliding component mounting groove 702, and the inner roller 704 partially protrudes to the outside of the inner sliding component mounting groove 702, and the distances between the four inner rollers 704 and the center point of the foundation ring 1 are the same, so as to ensure that the limit assembly contacts the outer wall of the engineering pile through the four inner rollers 704.

[0036] In this embodiment, the inner roller 704 preferably adopts an inner concave roller whose outer diameter gradually increases from the middle to the two ends, and the curvature of the outer wall of the inner roller 704 in its axial direction is adapted to the curvature of the outer wall of the engineering pile, so that the outer wall of the inner roller 704 can roll in close contact with the outer wall of the engineering pile to prevent collision with the outside of the pile, thereby avoiding the formation of sliding friction between the guide limiter and the outer wall of the engineering pile when the guide limiter and the engineering pile move relative to each other, ensuring that there is no mutual interference when the two move relative to each other.

[0037] In this embodiment, the two limit assemblies are spaced apart in the upper and lower parts, and the spacing between the two is 25 cm.

[0038] See also Figure 2 , two sets of anchor chain assemblies are respectively arranged above the two limiting assemblies as connecting assemblies; specifically, each set of anchor chain assemblies is composed of four connecting anchor chains 9; correspondingly, four connecting lifting ears 8 are evenly distributed along the circumferential direction on the top and bottom surfaces of the base ring 1 of each limiting assembly; both ends of each connecting anchor chain 9 are provided with a shackle 10, so that the end of each connecting anchor chain 9 is detachably connected to the connecting lifting ear 8 through the shackle 10; in this embodiment, the connecting lifting ear 8 is an outwardly convex semicircular ring to cooperate with the shackle 10.

[0039] In the anchor chain assembly located between the two limit assemblies, four connecting anchor chains 9 are arranged vertically and evenly distributed along the circumferential direction of the two foundation rings 1, and the top ends of the four connecting lifting ears 8 on the bottom surface of the upper foundation ring 1 are connected to the four connecting lifting ears 8 on the top surface of the lower foundation ring 1 through the shackles 10 arranged at the ends, and the bottom ends of the four connecting lifting ears 8 on the top surface of the lower foundation ring 1 are connected to the shackles 10 arranged at the ends; in the anchor chain assembly located above the upper limit assembly, four connecting anchor chains 9 are evenly distributed along the circumferential direction of the foundation ring 1, and the top ends of the four connecting anchor chains 9 are connected to the hook of the crane through the shackles 10 arranged at the ends, and the bottom ends of the four connecting lifting ears 8 on the top surface of the foundation ring 1 are connected to the shackles 10 arranged at the ends, and then, the adjustable guide limiter for rock-embedded pile planting is lowered by the crane so that it is lowered into the rock-embedded borehole synchronously with the engineering pile.

[0040] See also Figure 5 The specific steps of the rock-embedded pile planting process using the adjustable guide stopper for rock-embedded pile planting of this embodiment are described as follows:

[0041] S1. Set up the working platform;

[0042] S2, measuring and placing pile positions;

[0043] S3, lower the casing, the diameter of which is 60cm larger than the diameter of the engineering pile;

[0044] In this step, there will be a plane deviation between the center point of the casing and the designed pile position;

[0045] S4, rock-embedded drilling;

[0046] In this step, the diameter of the rock-embedded borehole is preferably 30 cm larger than the diameter of the engineering pile. Specifically, a multi-pile jacket rock-embedded pile foundation is adopted. The borehole centers of multiple piles are released synchronously to ensure that the relative position of the borehole centers is accurately laid out. The verticality of the borehole is controlled by selecting a suitable drilling rig during drilling and cooperating with drilling mud wall protection. During the drilling process, the drilling depth is calculated according to the designed final hole elevation and the platform top elevation, and the drilling depth is controlled by controlling the drill rod length. Before the final hole, the drilling depth is marked on the drill rod by reverse calculation. When the drill rod mark is 50 cm away from the predetermined position, low speed and low footage are used to drill until the designed elevation.

[0047] S5, hole cleaning, using air lift reverse circulation to clean the hole, and immediately after the hole cleaning is completed, the engineering piles are planted;

[0048] S6, planting stakes;

[0049] In this step, the specific implementation steps of pile planting are as follows: before pile planting, determine the number of guide limiters to be used according to the pile length, and complete the assembly of the guide limiters on site according to the spacing of 15m to 20m between adjacent guide limiter components; when the engineering pile is lowered to 1m away from the working platform, set the guide limiter on the outside of the engineering pile, and adjust the stroke of each jack according to the deviation of the actual lowering position of the casing from the designed pile position in the circumferential direction, so as to use the guide to correct the plane deviation generated during the lowering of the casing, and ensure that the engineering pile is lowered to the designed pile position; then, lift the engineering pile and the guide limiter at the same time, and lower them with the engineering pile until the engineering pile is lowered to the designed elevation;

[0050] S7, grouting: grouting can be carried out continuously. When the grouting reaches the bottom of the casing, the grouting is suspended. After the grouting strength is increased, the backfilling operation in the engineering pile is carried out. Bag sand or drill residue is used for backfilling. The core of the engineering pile is filled to the designed elevation through the guide tube. After the grouting is completed, the engineering pile is filled with sand, and the top is squeezed and grouting is carried out for secondary grouting around the pile.

[0051] S8. Remove and recycle the guide limiter: After the grouting operation is completed and the grouting material has a certain strength, lift the guide limiter as a whole. When the uppermost limiter is 1m above the working platform, pull out the pin in the ring plate of this layer of limiter, and divide the limiter into two left and right semicircular ring plates. The lower limiters are removed in this way, and finally the left and right semicircular ring plate groups are placed on the working platform to readjust the jacking stroke according to the plane position of the casing of the next pile position for the construction of the engineering pile at the next pile position.

Claims

1. An adjustable guide stopper for rock-embedded piles, characterized in that: The invention is composed of N limit assemblies and N sets of anchor chain assemblies; wherein each limit assemblies comprises a plurality of adjustment devices, a plurality of inner sliding assemblies (7) and a plurality of outer sliding assemblies (6) arranged on a base ring (1); the base ring (1) is a horizontally arranged circular ring body, which is formed by two arc-shaped semi-ring bodies being abutted and connected; a plurality of adjustment devices are evenly arranged radially along the circumferential direction of the base ring (1), and each adjustment device comprises a jack (5), which is arranged with the piston end facing outward and is vertically fixed on the annular outer wall of the base ring (1) through the cylinder end; a plurality of inner sliding assemblies (7) are respectively arranged in a plurality of inner sliding assembly mounting grooves (702) evenly arranged on the annular inner wall of the base ring (1), and each inner sliding assembly (7) comprises an inner roller (704) which can rotate along the axial direction of the base ring (1), and the inner roller (704) is provided with a plurality of inner rollers (704) which can rotate along the axial direction of the base ring (1), and the inner rollers (704) are provided with a plurality of inner rollers (704) which can rotate along the axial direction of the base ring (1). The roller (704) is arranged in a manner of partially protruding to the outside of the inner sliding component installation groove (702) so as to be able to roll in contact with the outer wall of the engineering pile; a plurality of outer sliding components (6) are fixed on the end faces of the jack pistons of the plurality of adjustment devices in a one-to-one correspondence, each outer sliding component (6) comprises an outer roller (604) that can rotate along the axial direction of the base ring (1), and the outer roller (604) can roll in contact with the inner wall of the casing; N limit components are arranged coaxially and at intervals from top to bottom, and N sets of anchor chain components are arranged above each limit component; each set of anchor chain components is composed of a plurality of connecting anchor chains (9) uniformly arranged along the circumferential direction of the limit components, the bottom end of each connecting anchor chain (9) is connected to the top surface of the base ring (1) of the lower limit component, and the top end thereof is connected to the bottom surface of the base ring (1) of the upper limit component or to the hook.

2. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: The two arcuate semi-ring bodies are connected via a plug-in connector (2) arranged at both ends thereof; the plug-in connector (2) comprises an insert block (201) arranged at one end of the arcuate semi-ring body and a slot (202) arranged at the other end of the arcuate semi-ring body, and the insert block matches the slot (202), so that the adjacent ends of the two arcuate semi-ring bodies are plug-in connected via the insert block (201) and the slot (202); a plurality of through holes corresponding to each other are evenly distributed on the groove walls on both sides of the insert block (201) and the slot (202), so that the insert block (201) and the slot (202) of the plug-in connection are detachably connected and fixed via a plurality of fixing pins (3) respectively inserted into four groups of intersecting through holes.

3. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: The inner diameter of the foundation ring (1) is larger than the diameter of the pile hole of the engineering pile.

4. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: The outer sliding assembly (6) further comprises an outer roller shaft (602) and an outer roller mounting seat (603); the outer roller mounting seat (603) is a U-shaped mounting seat consisting of a bottom plate and two side plates symmetrically fixed on a side plate surface of the bottom plate, the two side plates are symmetrically provided with intersecting outer roller shaft holes (601), and the other side plate surface of the bottom plate is fixed to the piston end surface of the jack (5); the outer roller (604) is a roller structure, and a central axial through hole is provided on it, so that the outer roller (604) can be rotatably sleeved on the outside of the outer roller shaft (602), and the two ends of the outer roller shaft (602) are passed through and fixed in the two outer roller shaft holes (601) on the outer roller mounting seat (603).

5. The adjustable guide stopper for rock-embedded pile according to claim 1 or 4, characterized in that: The outer roller (604) is an outwardly convex roller with an outer diameter gradually decreasing from the middle to the two ends, and the curvature of its outer wall in its axial direction is adapted to the curvature of the inner wall of the casing, so that the outer roller (604) can reciprocate along the axial direction of the casing in a manner of fitting the inner wall of the casing.

6. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: The inner sliding assembly (7) further comprises an inner roller shaft (701); the inner roller (704) is a roller structure, on which a central axial through hole is opened, so that the inner roller (704) can be rotatably sleeved on the outer side of the inner roller shaft (701), and the two ends of the outer side of the inner roller shaft (701) are fixed on the opposite side groove walls in the inner sliding assembly installation groove (702) in the horizontal direction.

7. The adjustable guide stopper for rock-embedded pile according to claim 1 or 6, characterized in that: The inner roller (704) is an inner concave roller with an outer diameter gradually increasing from the middle to the two ends, and the curvature of its outer wall in the axial direction is adapted to the curvature of the outer wall of the engineering pile, so that the inner roller (704) can reciprocate along the axial direction of the engineering pile in a manner of fitting the outer wall of the engineering pile.

8. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: The spacing distance between two adjacent limiting components in the axial direction is 15 cm to 25 cm.

9. The adjustable guide stopper for rock-embedded pile according to claim 1, characterized in that: A plurality of connecting lifting ears (8) are evenly distributed along the circumferential direction on the top surface and the bottom surface of the base ring (1) of each limiting assembly, and the number of the connecting lifting ears (8) is consistent with the number of connecting anchor chains (9) in each set of anchor chain assemblies; and shackles (10) are provided at both ends of each connecting anchor chain (9), so that the end of each connecting anchor chain (9) can be detachably connected to the connecting lifting ears (8) through the shackles (10).

10. A pile planting process using the adjustable guide stopper for rock-embedded pile planting as claimed in any one of claims 1 to 9, characterized in that: The steps are: 1) setting up a working platform, 2) measuring and placing pile positions, 3) lowering casing, 4) rock-embedded drilling, 5) air lift reverse circulation hole cleaning, 6) pile planting, 7) grouting, and 8) removing and recovering the guide limiter; wherein, the specific implementation steps of pile planting are: before pile planting, the number of guide limiters to be used is determined according to the pile length, so that the spacing between adjacent guide limiter components is 15m to 20m, and the guide limiters are assembled on site; the guide limiter is sleeved on the outside of the engineering pile, and according to the deviation of the actual lowering position of the casing from the designed pile position in the circumferential direction, the stroke of each jack is adjusted to correct the deviation by using the guide, so as to ensure that the engineering pile is lowered to the designed pile position; then, the engineering pile and the guide limiter are lifted at the same time, and lowered along with the engineering pile until the engineering pile is lowered to the designed elevation.

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