CN214005651U - Grouting pipe - Google Patents

Abstract

The utility model discloses a slip casting pipe belongs to building structure technical field. The grouting pipe of the utility model is used for grouting in the grouting chamber of the joint; the slip casting pipe is provided with the connecting piece towards the one end that connects, is buckle connection between connecting piece and the joint, or for expanding joint, or for the closed connection of interference connection, therefore after upper segment tubular pile and articulate and sink into nature ground, can insert the slip casting pipe from the upper end of upper segment tubular pile to with slip casting pipe and articulate, improved the convenience of being connected of slip casting pipe and joint greatly, thereby improved the efficiency that the prefabricated tubular pile of concatenation formula was buried underground.

Description

Grouting pipe

Technical Field

The utility model relates to a building structure technical field, more specifically say, relate to a slip casting pipe.

Background

Precast pipe piles refer to pipe piles made at or near a construction site, generally of a concrete structure, or a steel structure, or a wooden structure. The construction field of Chinese buildings adopts more precast piles, mainly including concrete precast tubular piles and steel pipe piles. The concrete precast pile can bear larger load, is firm and durable, has high construction speed, is one of pile types widely applied, has larger influence on the surrounding environment in the construction process, and is commonly used as a concrete solid square pile and a prestressed concrete hollow tubular pile. The steel pile mainly comprises a steel pipe pile and an H-shaped steel pile.

In the related field, pile sinking methods mainly include a hammering method, a static pile pressing method, a vibration method and the like, and after the precast tubular pile is sunk to a preset bearing layer, grouting is usually performed to form an enlarged head between the precast tube and the bearing layer, so that the single-pile bearing capacity and the pulling-resistant bearing capacity of the precast tubular pile are enhanced. For example, chinese patent application No. 2011103821069 discloses a slip casting type micro steel pipe pile, which includes a steel pipe, a plurality of spaced slurry outlet groups are axially disposed on a side wall of the steel pipe, and a rubber sealing ring is sleeved outside each slurry outlet group. Each slurry outlet hole group consists of a plurality of slurry outlet holes which are uniformly distributed on the same horizontal plane.

In addition, when the pre-buried pipe pile needs a long length, the common method is to splice two or more sections of precast pipe piles for use. For example, chinese patent application No. 2016101038166 discloses a prefabricated tubular pile concave-convex joint, wherein two symmetrical concave parts are arranged on the pipe wall of the prefabricated upper tubular pile pipe orifice, two symmetrical convex parts are arranged on the pipe wall of the prefabricated lower tubular pile pipe orifice, and the two concave parts are matched with the two convex parts; sealing plates are arranged in the upper prefabricated pipe pile and the lower prefabricated pipe pile, and extrusion holes are formed in the pipe wall between the sealing plates and the pipe orifice; the joint of the pipe openings of the prefabricated upper pipe pile and the prefabricated lower pipe pile is provided with the corresponding threaded hole and the corresponding screw rod, so that high-strength concrete mortar pulp slurry can be injected between the columns from the grouting port after the upper pipe pile and the lower pipe pile are in threaded connection, and the strength of the connecting joint of the upper pipe pile and the lower pipe pile is improved.

However, for the spliced precast tubular pile, in order to improve the strength of the connection node, structures such as the seal plates arranged at the joints of the spliced precast tubular pile hinder grouting at the bottom end of the precast tubular pile; because the whole length of the spliced prefabricated pipe pile is long, and the pressure-bearing strength required by the joint at the joint is very high, the extrusion hole cannot be directly formed on the side wall of the pipe pile above the joint. Therefore, how to quickly perform grouting at the joint of the spliced precast tubular pile is also an urgent technical problem to be solved in the related field.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome among the prior art not enough convenient enough to the precast tubular pile junction slip casting of concatenation formula, provide a slip casting pipe, the connecting piece that aims at utilizing the slip casting pipe improves its and articulate convenience.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model relates to a grouting pipe, which is used for grouting in a grouting chamber of a joint; the grouting pipe is provided with a connecting piece towards one end of the joint, and the connecting piece is connected with the joint in a closed manner.

Further, the closed connection is a snap connection, or an expansion connection, or an interference connection.

Furthermore, a plurality of sections of clamping grooves are circumferentially formed in the connecting piece, and the clamping grooves are used for being in clamping fit with clamping jaws arranged on the wall of a first grouting hole in the joint.

Further, the claw portion of the claw is forced to be compressed in the radial direction of the grout pipe when the connector is inserted into the first grout hole.

Further, the bottom end of the connecting piece is provided with a clamping inclined plane, and the clamping inclined plane faces the claw part of the clamping jaw.

Furthermore, a clamping ring is arranged on the connecting piece, a plurality of notches are formed in the clamping ring, and a clamping groove is formed in the connecting piece above the clamping ring; the breach gives the jack catch that sets up on the first slip casting hole pore wall on the joint provides the entering passageway in the draw-in groove, just after the jack catch got into in the draw-in groove, the snap ring can for the jack catch rotates, so that the breach with the jack catch position staggers.

Furthermore, a plurality of limiting parts are arranged on the grouting pipe, and the first grouting hole is formed in the center of the upper end plate of the joint.

Furthermore, the locating part has more than two spacing claws to constitute, the length of spacing claw is less than slip casting outside of tubes radius and is connected the difference of the last section tubular pile internal radius on the joint.

Further, a sealing ring is arranged on the limiting part and located at a position above the clamping groove on the limiting part.

Further, a sealing ring is arranged on the limiting part and can be clamped between two convex ribs on the wall of the first grouting hole in the joint.

Furthermore, more than two sealing rings are arranged on the limiting part, and the adjacent sealing rings are used for being matched with the convex ribs on the wall of the first grouting hole on the joint in shape.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the grouting pipe of the utility model is used for grouting in the grouting chamber of the joint; the slip casting pipe is provided with the connecting piece towards the one end that connects, is closed connection between connecting piece and the joint, therefore after upper segment tubular pile and articulate and sink into nature ground, can insert the slip casting pipe from the upper end of upper segment tubular pile to with slip casting pipe and articulate, improved the convenience of being connected of slip casting pipe and joint greatly, thereby improved the efficiency that the precast tubular pile of concatenation formula was buried underground.

(2) The utility model discloses in, be provided with a plurality of locating part on the slip casting pipe, first slip casting hole is seted up at the up end plate central point that connects and is put, therefore when the slip casting pipe inserts the upper segment tubular pile, the slip casting pipe receives the spacing of locating part, can not skew the axis of upper segment tubular pile to convenient location in slip casting bottom of tubes end and first slip casting hole.

(3) The utility model discloses in, be provided with the sealing washer on the locating part, the sealing washer can be gone into between two protruding muscle on the first slip casting hole pore wall that connects, perhaps, be provided with the sealing washer more than two on the locating part, adjacent sealing washer be used for with connect on the first slip casting hole pore wall protruding muscle shape cooperation, therefore can be directly insert and establish in first slip casting hole slip casting pipe from the up end of upper segment tubular pile, protruding muscle passes through the shape cooperation with the sealing washer when realizing connecting with slip casting union coupling, realize the sealed to first slip casting hole.

Drawings

Fig. 1 is a schematic structural view of the spliced precast tubular pile of the present invention;

fig. 2 is a schematic structural view of the joint of the present invention;

FIG. 3 is a schematic structural view of the upper end plate of the present invention;

FIG. 4 is a schematic structural view of the force-transmitting steel pipe of the present invention;

fig. 5 is a schematic view of the pile sinking process of the spliced precast tubular pile of the utility model;

FIG. 6 is a schematic structural view of a connecting member according to the present invention;

fig. 7 is a schematic structural view of a limiting member of the present invention;

fig. 8 is a schematic view of the engagement between the radial claws and the slots of the present invention;

fig. 9 is a schematic view of the engagement between the snap ring and the claw according to the present invention;

fig. 10 is a schematic view of the fit between the middle seal ring and the rib of the present invention.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

In some application scenarios, the length requirement of the prefabricated pipe pile may reach more than 15m, and the length of a single-section pipe pile is generally about 10m, so that the two single-section pipe piles are spliced to be used in a common way. However, when the length of the pipe pile is long, the requirements on the pressure-bearing performance and the connection strength of the joint are high, and the connection methods such as welding, flange screwing, sulfur plaster riveting and the like between the single-section pipe pile and the single-section pipe pile are difficult to ensure that the whole pipe pile has high stability and simultaneously has high pulling resistance and pressure-bearing performance.

In order to solve the above problem, this embodiment provides a prefabricated tubular pile of concatenation formula, and this prefabricated tubular pile is formed by two sections tubular pile concatenation. Fig. 1 shows a precast tubular pile structure of the present embodiment. In order to facilitate the connection between the upper tubular pile 100 and the lower tubular pile 200, a joint 300 may be disposed between the upper tubular pile 100 and the lower tubular pile 200, and the position of the joint 300 may be used as a grouting point of the precast tubular pile. Specifically, after the precast tubular pile of the embodiment is driven into a designed elevation, grouting may be performed into the joint 300, and then the grout is extruded from the extrusion hole 331 of the joint 300, and finally solidified into an enlarged head at the periphery of the connection between the upper tubular pile 100 and the lower tubular pile 200.

In the embodiment, the joint 300 is grouted, and the grout is extruded from the extrusion holes 331 to form the expanded head, so that the connection strength between the pile body and the soil body can be improved, and the integral bearing performance and the anti-pulling performance of the pipe pile are improved; in addition, the joints are filled with the slurry, and the joints are wrapped with a layer of slurry, that is, the expanded head, so that the precast tubular pile of the embodiment is actually formed into a reinforced concrete structure at the joints, and the connection stability between the upper-section tubular pile 100 and the lower-section tubular pile 200 can be improved.

In the following, the following description is given,

fig. 2 shows the structure of a joint 300 as a first embodiment. Specifically, the fitting 300 includes an upper end plate 310, a lower end plate 320, and a force transfer steel tube 330. The upper end plate 310 may be connected to the upper-section tubular pile 100, specifically, may be connected by bolts; the lower end plate 320 may be connected to the lower tubular pile 200, and may be a bolt connection. In addition, in order to improve the connection strength between the joint 300 and the upper tubular pile 100 and the lower tubular pile 200, after the joint 300 is bolted to the upper tubular pile 100 and the lower tubular pile 200, the upper end plate 310 and the upper tubular pile 100 may be additionally welded or spot-welded, and the lower end plate 320 and the lower tubular pile 200 may be welded or spot-welded.

The force transmission steel pipe 330 is arranged between the upper end plate 310 and the lower end plate 320, the upper end of the force transmission steel pipe 330 is connected with the lower side surface of the upper end plate 310, and the lower end of the force transmission steel pipe 330 is connected with the upper side surface of the lower end plate 320. The force transfer steel tube 330 is connected to the upper end plate 310 and the lower end plate 320 to form a closed grouting chamber. The force transmission steel tube 330 may be welded to the upper end plate 310 and the lower end plate 320, or the force transmission steel tube 330 may be integrally stamped with the upper end plate 310 and the lower end plate 320.

In order to connect the upper end plate 310 and the upper tubular pile 100, the edge of the upper end plate 310 may protrude from the outer sidewall of the force transmission steel pipe 330 and form a first connection portion, and then the first connection portion is provided with a plurality of first connection holes 311, and connection bolts are inserted through the first connection holes 311 and connected to the upper tubular pile 100, thereby connecting the upper end plate 310 and the upper tubular pile 100.

Similarly, in order to connect the lower end plate 320 and the lower tubular pile 200, the edge of the lower end plate 320 may protrude from the outer sidewall of the force transmission steel pipe 330, and a second connection portion is formed, and then a plurality of second connection holes 321 are formed in the second connection portion.

Fig. 3 shows the structure of the upper end plate 310. Specifically, in order to realize the filling of the grouting material into the grouting chamber, the upper end plate 310 may be provided with a first grouting hole 332, and the first grouting hole 332 is used for connecting the grouting pipe 400.

The first grout hole 332 and the grout pipe 400 may be connected by means of a screw connection. Specifically, as an example, the first injection hole 332 may be provided with an internal thread, and the outer sidewall of the injection pipe may be provided with an external thread that is engaged with the internal thread of the first injection hole 332, and the internal thread may be engaged with the external thread when the first injection hole 332 is coupled to the injection pipe 400.

Fig. 4 shows the construction of the force transfer steel tube 330. Specifically, in order to extrude the slurry from the grouting chamber, the force transmission steel pipe 330 may be provided with a plurality of extrusion holes 331.

As an example of the arrangement of the extrusion holes 331, the extrusion holes 331 may be divided into a plurality of rows, and the extrusion holes 331 in different rows may be arranged along the circumference of the force transmission steel pipe 330, specifically, may be arranged equidistantly, so as to ensure that the slurry is distributed relatively uniformly around the force transmission steel pipe 330.

As a further improvement of this embodiment, the extrusion holes 331 in the same row may be arranged along the axial direction of the force transmission steel pipe 330. Meanwhile, positions between the extrusion holes 331 located in different columns may correspond to each other.

The force transmission steel pipe 330 may be provided with a plurality of reinforcing ribs 333 on the outer side wall thereof, and the reinforcing ribs 333 are used for improving the rigidity and strength of the whole connector 300. In addition, the plurality of reinforcing ribs 333 may be arranged along the circumferential direction of the outer sidewall of the force transmission steel pipe 330, specifically, may be arranged equidistantly along the circumferential direction of the outer sidewall of the force transmission steel pipe 330, so that the overall rigidity and strength distribution of the joint 300 are more uniform.

As a further optimization, the force transmission steel pipe 330 is provided with at least one extrusion hole 331 at a position between the two reinforcing ribs 333. Therefore, when the slurry is extruded from the extrusion holes 331 of the force transmission steel pipe 330, the slurry is not disturbed by the reinforcing ribs 333, so that the slurry is not uniformly distributed around the joint 300.

In this embodiment, the grouting pipe 400 may be inserted into the hollow structure of the upper-section pipe pile 100. According to the structure of the joint 300, after the joint 300 is connected to the lower tubular pile 200, the grouting pipe 400 can be connected to the upper end plate 310 of the joint 300, and finally the lower tubular pile 200 is sleeved on the grouting pipe 400, and the connection between the lower tubular pile 200 and the joint 300 is completed.

Specifically, fig. 5 shows a method for burying a spliced precast tubular pile. The burying method specifically comprises a pile sinking stage, a grouting stage and a pile forming stage. Wherein,

the pile sinking stage is to connect the upper tubular pile 100, the lower tubular pile 200 and the joint 300 and sink them into the natural ground to reach the designed elevation. The method specifically comprises the following steps:

step 1.1, according to the state a, static pressure or hammering is adopted to sink the lower section of tubular pile 200 into the natural ground during field processing, and when the length of the upper end face of the lower section of tubular pile 200 leaking out of the natural ground is less than 1m, pile sinking is stopped.

And 1.2, referring to the state b, connecting the joint 300 with the lower tubular pile 200, specifically, connecting the lower end plate 320 of the joint 300 with the upper end surface of the lower tubular pile 200 through a connecting bolt.

And step 1.3, connecting the grouting pipe 400 with the joint 300 according to the state c.

Step 1.4, referring to the state d, connecting the joint 300 with the upper section of tubular pile 100, specifically, connecting the upper end plate 310 of the joint 300 with the lower end surface of the upper section of tubular pile 100 through a connecting bolt.

And 1.5, sinking the upper-section tubular pile 100, the lower-section tubular pile 200 and the joint 300 into the natural ground by adopting static pressure or hammering according to the state e, and stopping sinking the pile when the upper end of the upper-section tubular pile 100 is sunk into the natural ground or the lower end of the lower-section tubular pile 200 reaches the designed elevation.

The grouting stage refers to the process of injecting slurry into the grouting chamber of the joint 300 through the grouting pipe 400. After the grouting chamber is continuously filled with slurry, a positive pressure environment begins to be formed in the grouting chamber, so that the slurry in the grouting chamber is extruded out of the extrusion holes 331 and is extruded into the soil body. Wherein the slurry may be a concrete slurry.

Referring to the state f, the pile forming stage is that after the slurry is extruded from the extrusion hole 331 and around the joint, the concrete is naturally solidified and forms an enlarged head tightly connected with the soil outside the pile body of the prefabricated pipe pile.

In the following, the following description is given,

as a second example of the present embodiment, in order to facilitate the connection of the grouting pipe 400 with the first grouting hole 332, a connection member 410 may be provided at the bottom end of the grouting pipe 400. The connector 410 may allow for connections other than threaded connections, such as snap connections, expansion connections, interference connections, etc., between the grout tube 400 and the fitting 300.

For example, referring to fig. 6, the connector 410 may be circumferentially provided with a plurality of segments of slots 411, and the hole wall of the first grouting hole 332 is provided with a plurality of claws 334, the claw parts of the claws 334 being arranged along the axial direction of the grouting pipe 400 and corresponding to the positions of the slots 411. After the grouting pipe 400 is inserted into the first grouting hole 332, the jaws 334 are pressed by the bottom end of the connecting piece 410 to be subjected to yielding deformation, specifically, the jaw parts are compressed along the radial direction of the grouting pipe 400; when the bottom end of the connecting member 410 is continuously pressed down and loses contact with the jaws 334, the jaws 334 elastically recover to be deformed by themselves and are caught in the catching grooves 411 to complete the connection of the grout pipe 400 and the coupling 300.

Further, to facilitate the catching of the jaws 334, the bottom end of the connector 410 may be provided with a catching slope 412, and the catching slope 412 may be disposed toward the jaw portions of the jaws 334.

When the grouting pipe 400 and the joint 300 can be fastened, the grouting pipe 400 is inserted from the upper end surface of the upper section tubular pile 100 and the grouting pipe 400 and the joint 300 are conveniently connected, so that the upper section tubular pile 100 and the joint 300 can be connected and driven into a designed elevation, then the grouting pipe 400 is connected with the joint 300, the upper section tubular pile 100 can be prevented from being lifted, and the construction difficulty is reduced.

Of course, in order to quickly insert the grouting pipe 400 into the joint 300, referring to fig. 7, a plurality of stoppers 430 may be disposed on the grouting pipe 400, and the first grouting hole 332 may be opened at a central position of the upper end plate 310. The limiting member 430 may be composed of more than two limiting claws of a claw-shaped structure, and the length of the limiting claw may be slightly smaller than the difference between the inner radius of the upper tubular pile 100 and the outer radius of the grouting pipe 400, so that when the grouting pipe 400 is inserted into the upper tubular pile 100, the grouting pipe 400 is limited by the limiting member 430, and will not deviate from the axis of the upper tubular pile 100, which is convenient for positioning the bottom end of the grouting pipe 400 and the first grouting hole 332.

Further, referring to fig. 8, the claw portions of the jaws 334 may be disposed in a radial direction of the grout pipe 400, and when the grout pipe 400 is inserted into the first grout hole 332, the jaws 334 are pressed by the bottom end of the connecting member 410 to be yield-deformed, specifically, yield-deformed in the radial direction of the grout pipe 400; when the bottom end of the connecting member 410 is continuously pressed down and loses contact with the jaws 334, the jaws 334 elastically recover to be deformed by themselves and are caught in the catching grooves 411 to complete the connection of the grout pipe 400 and the coupling 300.

For another example, referring to fig. 9, a clamping ring 413 may be disposed at the bottom end of the connecting member 410, and a plurality of notches 414 may be disposed on the clamping ring 413; the connecting member 410 further has a slot 411 above the snap ring 413. The first injection hole 332 may be provided with a plurality of claws 334, the number of the claws 334 may be the same as the number of the notches 414, and the positions of the claws 334 correspond to the positions of the notches 414. After the bottom end of the connecting member 410 is inserted into the first grouting hole 332, if the snap ring 413 contacts the jaws 334 and is blocked by the jaws 334, the grouting pipe 400 may be rotated such that the jaws 334 correspond to the notches 414, and then, after the grouting pipe 400 is continuously inserted such that the jaws 334 enter the clamping grooves 411, the grouting pipe 400 is rotated again such that the jaws 334 are misaligned with the notches 414, thereby completing the connection of the grouting pipe 400 and the joint 300.

Of course, in order to prevent the slurry from being extruded from the gap between the wall of the first grouting hole 332 and the grouting pipe 400 during grouting, a sealing ring 420 may be provided on the connecting member 410, and this solution is also applicable to other connection modes of the grouting pipe 400 and the joint 300 in this embodiment.

For another example, when the sealing ring 420 is disposed on the connecting member 410, a corresponding limiting portion similar to an expansion joint structure may be disposed to complete the connection between the grouting pipe 400 and the upper tubular pile 100. Specifically, referring to fig. 10, two or more sealing rings 420 may be provided on the connecting member 410, and a rib 335 may be provided on the first injection hole 332, and the rib 335 may have elasticity itself. When the grouting pipe 400 is inserted into the first grouting hole 332, the rib 335 may be located between the two sealing rings 420, and the connection between the grouting pipe 400 and the upper section tubular pile 100 is completed in a shape-fitting manner, and the first grouting hole 332 is sealed; two or more ribs 335 may be provided in the first grouting hole 332, and the grouting pipe 400 may be connected to the upper tubular pile 100 by interposing the packing 420 between the two ribs 335.

In this embodiment, the pile sinking stage specifically includes the following steps:

step 1.1, sinking the lower section of tubular pile 200 into the natural ground by static pressure or hammering during field processing, and stopping pile sinking when the length of the upper end surface of the lower section of tubular pile 200 leaking out of the natural ground is less than 1 m.

Step 1.2, connecting the joint 300 with the lower tube pile 200, then hoisting the upper tube pile 100 to the position corresponding to the lower tube pile, and connecting the upper tube pile 100 with the joint 300.

And 1.3, sinking the upper-section tubular pile 100, the lower-section tubular pile 200 and the joint 300 into the natural ground by adopting static pressure or hammering, and stopping sinking the pile when the upper end surface of the upper-section tubular pile 100 is submerged into the natural ground or the lower end of the lower-section tubular pile 200 reaches the designed elevation.

And 1.4, inserting the bottom end of the grouting pipe 400 from the upper end face of the upper section of tubular pile 100, and connecting the bottom end of the grouting pipe 400 with the upper end face of the joint 300.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (11)

1. A grouting pipe is used for grouting in a grouting chamber of a joint; the method is characterized in that: the grouting pipe is provided with a connecting piece towards one end of the joint, and the connecting piece is connected with the joint in a closed manner.

2. The grouting pipe according to claim 1, wherein: the closed connection is a buckle connection, or an expansion connection, or an interference connection.

3. The grouting pipe according to claim 2, characterized in that: a plurality of sections of clamping grooves are circumferentially formed in the connecting piece and are used for being in clamping fit with clamping jaws arranged on the wall of a first grouting hole in the joint.

4. The grouting pipe according to claim 3, wherein: the claw part of the claw is forced to be compressed along the radial direction of the grouting pipe when the connecting piece is inserted into the first grouting hole.

5. The grouting pipe according to claim 4, wherein: the bottom of connecting piece is provided with the card and goes into the inclined plane, the inclined plane of going into towards the claw setting of jack catch.

6. The grouting pipe according to claim 1, wherein: the connecting piece is provided with a clamping ring, the clamping ring is provided with a plurality of notches, and the connecting piece is provided with a clamping groove above the clamping ring; the breach gives the jack catch that sets up on the first slip casting hole pore wall on the joint provides the entering passageway in the draw-in groove, just after the jack catch got into in the draw-in groove, the snap ring can for the jack catch rotates, so that the breach with the jack catch position staggers.

7. The grouting pipe according to any one of claims 3 to 6, wherein: the grouting pipe is provided with a plurality of limiting parts, and the first grouting hole is formed in the center of the upper end plate of the joint.

8. The grouting pipe according to claim 7, wherein: the locating part has the spacing claw of more than two to constitute, the length of spacing claw is less than slip casting outside of tubes radius and is connected the difference of the upper segment tubular pile internal radius on the joint.

9. The grouting pipe according to any one of claims 7, wherein: the limiting part is provided with a sealing ring, and the sealing ring is located at the position above the clamping groove on the limiting part.

10. The grouting pipe according to claim 7, wherein: the locating part is provided with a sealing ring, and the sealing ring can be clamped between two convex ribs on the wall of a first grouting hole in the joint.

11. The grouting pipe according to claim 7, wherein: the locating part is provided with more than two sealing rings, and the adjacent sealing rings are used for being matched with the convex ribs on the wall of the first grouting hole on the joint in shape.

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