Prefabricated special-shaped pile

Abstract

The utility model discloses a prefabricated special-shaped pile, which comprises a pile body formed by alternately arranging and connecting thick pile sections and thin pile sections, and more than one embedded pipe embedded along the length direction of the pile body, and the embedded pipe is provided with a slurry outlet capable of being communicated to the outer wall of the pile body at the shaft shoulder of the thick pile section and / or the thin pile section. According to the prefabricated special-shaped pile, grouting can be conducted on the embedded pipe, and slurry can flow out of the slurry outlet and fill the periphery of the thin pile section so as to eliminate a radial gap between the thin pile section and a soil body around the thin pile section, so that the pulling resistance and the bearing capacity of the prefabricated special-shaped pile in a short period after pile pressing construction are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated piles, in particular to prefabricated special-shaped piles. Background Art

[0002] Prefabricated special-shaped piles are a type of prefabricated piles, which refer to piles whose cross-section changes along the axial direction (pile length direction). Prefabricated special-shaped piles include thick pile sections and thin pile sections. When inserted into harder soil, a pile hole will be formed in the shape and size of the cross-section of the thick pile section. Therefore, after being inserted into the soil layer, the thick pile section can be in close contact with the surrounding soil layer. However, since the cross-section of the thin pile section is smaller than that of the thick pile section, there are radial and circumferential gaps between the thin pile section and the surrounding soil layer. Under natural conditions, it takes a long time for the soil around the thin pile section to recover (that is, the soil around the thin pile section fills the above gap). Therefore, after the prefabricated special-shaped pile is inserted into the harder soil, the friction force on the front side cannot be exerted, and its pull-out resistance and bearing capacity in the short term are relatively weak, which seriously affects the construction progress and test results. Utility Model Content

[0003] The utility model aims to provide a prefabricated special-shaped pile to solve the problem that the pull-out resistance and bearing capacity of the prefabricated special-shaped pile are relatively weak in a short period after the pile pressing construction.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The prefabricated special-shaped pile comprises a pile body composed of thick pile sections and thin pile sections alternately arranged and connected, and one or more embedded pipes buried along the length direction of the pile body, wherein the embedded pipe is provided with a slurry outlet at the axial shoulder of the thick pile section and / or the thin pile section which can be connected to the outer wall of the pile body.

[0006] Compared with the prior art, the utility model has the beneficial effect that grouting can be performed into the embedded pipe, and the slurry can flow out from the slurry outlet and fill the outer periphery of the thin pile segment to eliminate the radial gap between the thin pile segment and the surrounding soil, thereby improving the pull-out resistance and bearing capacity of the prefabricated special-shaped piles in a short period of time after construction.

[0007] On the basis of the above solution, a steel cage is provided in the pile body, and the steel cage includes a plurality of main bars arranged along the length direction of the pile body and stirrups surrounding the plurality of main bars in the circumferential direction;

[0008] The embedded pipe is located outside the stirrup, and / or the embedded pipe runs through the pile body.

[0009] On the basis of the above scheme, the outer diameter of the embedded pipe is less than or equal to the radial distance length from the stirrup to the outer peripheral wall of the thin pile section.

[0010] On the basis of the above solution, both ends of the embedded pipe are respectively provided with a male connector and a female connector for docking;

[0011] And / or, the slurry outlet is provided with a detachable sealing member.

[0012] On the basis of the above scheme, it also includes a grouting pipe which is movably inserted in the embedded pipe, and a grouting port is opened on the side wall of the grouting pipe close to the bottom.

[0013] On the basis of the above solution, the grouting pipe is respectively provided with first sealing members on both vertical sides of the grouting port.

[0014] On the basis of the above solution, the outer wall of the grouting pipe is provided with a clamping member embedded with the first sealing member;

[0015] And / or, the first sealing member includes at least one of an airbag and a sealing ring, wherein the airbag is connected to the trachea;

[0016] And / or, a limit clamp adapted to the first sealing member is provided on the inner wall of the embedded pipe.

[0017] On the basis of the above solution, connection components for butt connection are installed on both end surfaces of the pile body.

[0018] On the basis of the above scheme, the connection assembly includes a small screw sleeve and a large screw sleeve respectively arranged on the two end surfaces of the pile body, and also includes an elastic locking assembly and a locking nut.

[0019] The small screw sleeve is connected with an insert rod, the insert rod has an insert end, and a socket cavity is arranged in the large screw sleeve;

[0020] The elastic locking assembly is arranged in the socket cavity and forms a plug-in passage, and is encapsulated in the socket cavity by a locking nut;

[0021] The elastic locking component reversely locks the plug-in end inserted into the plug-in channel.

[0022] On the basis of the above scheme, the two end faces, the outer peripheral wall and the connecting components of the pile body are coated with an anti-corrosion layer;

[0023] and / or, the pile shaft is provided with hoops at both ends;

[0024] And / or, a pile tip is connected to the lower end of the pile body.

[0025] On the basis of the above scheme, it also includes a joint assembly, which is provided with a connecting pipe connected to the embedded pipe and a positioning installation ring sleeved on the connecting pipe, and the upper end and / or lower end of the pile body is provided with an accommodating cavity for accommodating the positioning installation ring.

[0026] On the basis of the above solution, the joint assembly is further provided with a second sealing member which is sleeved on the connecting pipe and is used to seal the connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a structural schematic diagram of a prefabricated special-shaped pile in an embodiment of the utility model;

[0028] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0029] Figure 3 It is a cross-sectional view of a prefabricated special-shaped pile in an embodiment of the utility model;

[0030] Figure 4 for Figure 3 Enlarged view of middle part B;

[0031] Figure 5 It is a structural schematic diagram of another prefabricated special-shaped pile in an embodiment of the utility model;

[0032] Figure 6 is a cross-sectional view of another type of prefabricated special-shaped pile;

[0033] Figure 7 for Figure 6 Enlarged view of middle C;

[0034] Figure 8 for Figure 7 Enlarged view of the middle D part;

[0035] Fig. 9 It is a schematic diagram of the cooperation between the limit clamping platform and the first sealing member;

[0036] Fig.10 It is a structural schematic diagram of the grouting pipe;

[0037] Fig.11 for Fig.10 Enlarged view of middle E part;

[0038] Fig.12 It is a structural schematic diagram of another grouting pipe;

[0039] Fig.13 for Fig.12 Enlarged view of the middle F part;

[0040] Fig.14 It is a structural schematic diagram of another type of prefabricated special-shaped pile;

[0041] Fig.15 is a cross-sectional view of another type of prefabricated special-shaped pile;

[0042] Fig.16 for Fig.15 Enlarged view of middle H section;

[0043] Fig.17 for Fig.15 Enlarged view of middle part I;

[0044] Fig.18A schematic diagram of the decomposed structure of the connected components;

[0045] Fig.19 is a cross-sectional view of a connection component;

[0046] Fig. 20 It is a structural cross-sectional view of prefabricated special-shaped piles;

[0047] Fig.21 It is a structural cross-sectional view of prefabricated special-shaped piles;

[0048] Fig. 22 for Fig. 20 Enlarged view of middle J part;

[0049] Fig.23 for Fig. 20 Enlarged view of the middle K section;

[0050] Fig.24 for Fig.21 Enlarged view of the middle L part;

[0051] Fig.25 for Fig.21 Enlarged view of the middle M part.

[0052] In the figure: 1, thick pile section; 11, shoulder; 12, connecting assembly hole; 2, thin pile section; 3, embedded pipe; 31, grout outlet; 311, sealing member; 311a, notch groove; 312, control valve; 32, main pipe; 33, branch pipe; 34, limit clamp; 4, main reinforcement; 41, stirrup; 42, upsetting head; 5, grouting pipe; 51, grouting outlet; 52, first sealing member; 53, clamping member; 54, Air pipe; 6. Connecting assembly; 61. Small screw sleeve; 62. Large screw sleeve; 621. Socket cavity; 63. Elastic locking assembly; 631. Elastic member; 632. Locking member; 64. Anti-slip nut; 65. Insert rod; 651. Plug end; 7. Joint assembly; 71. Connecting pipe; 72. Positioning and mounting ring; 73. Second sealing member; 74. Accommodating cavity; 741. Guide portion; 100. Prefabricated special-shaped pile. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0055] In the following embodiments, vertical refers to the height direction, which is also the direction of the pile length, the direction of the pile axial direction, the direction of the main reinforcement 4 length, the direction of the main reinforcement 4 axial direction, the direction of the grouting pipe 5 length, and the vertical direction of the grouting pipe 5.

[0056] Embodiment 1

[0057] See also Figure 1 , Figures 2 to 7 The present embodiment provides a prefabricated special-shaped pile 100, which includes a pile body and one or more pre-buried pipes 3 buried along the length of the pile body. The pile body is composed of thick pile sections 1 and thin pile sections 2 that are alternately arranged and connected.

[0058] The beneficial effect of this embodiment is that high-pressure grouting can be performed on the embedded pipe 3, and the slurry can flow out from the slurry outlet 31 and fill the outer periphery of the thin pile segment 2 to eliminate the radial gap between the thin pile segment 2 and the surrounding soil, thereby improving the pull-out resistance and bearing capacity of the prefabricated special-shaped pile 100 in a short period of time after construction.

[0059] In detail, the thick pile section 1 and the thin pile section 2 can be regular or irregular, and the pile type can be a pipe pile, a square pile or an irregular pile type, which is not limited here. There are at least two ways to set the embedded pipe 3:

[0060] The first method is: the embedded pipe 3 is a main pipe 32 vertically embedded in the pile body, and its side wall is provided with multiple main pipe 32 holes vertically from top to bottom. The thin pile section 2 of the pile body is provided with a through hole that can be connected to the outer wall of the pile body. From top to bottom, the main pipe 32 holes correspond to the through holes one by one and are connected.

[0061] The second way is: See Figure 3 , Figure 4 , Figure 6 , Figure 7 The embedded pipe 3 includes a main pipe 32 and a branch pipe 33. The main pipe 32 is arranged along the length direction of the pile body. One end of the branch pipe 33 is connected to the main pipe 32, and the other end is a slurry outlet 31. The slurry outlet 31 is located on the outer wall of the pile body at the thin pile section 2.

[0062] The number, shape and structure of the branch pipe 33 and the embedded pipe 3 are not strictly required and can be selected according to actual needs. The embedded pipe 3 can be arranged at the axial center of the prefabricated special-shaped pile 100 or at other positions, which is not limited here. Preferably, see Figure 3 , Figure 4 , Figure 6 , Figure 7The embedded pipe 3 is located outside the stirrup 41 to ensure that the combination of the steel cage and the concrete is not damaged and the bearing capacity of the pile is not weakened. When there are more than two embedded pipes 3 embedded in the same pile body, the embedded position of each embedded pipe 3 in the pile body is not limited and can be selected according to actual needs. Preferably, multiple grouting pipes 5 are evenly arranged along the inner periphery of the pile body so as to fully discharge grout around the outer periphery of the thin pile section 2.

[0063] Based on the above scheme, see Figure 3 , Figure 4 , Figure 6 , Figure 7 The prefabricated special-shaped pile 100 includes concrete and a steel cage embedded in the concrete, and the steel cage includes a plurality of main bars 4 arranged along the length direction of the pile body and stirrups 41 surrounding the plurality of main bars 4 in a circumferential direction, so as to ensure that the prefabricated special-shaped pile 100 has sufficient bearing capacity. Whether the embedded pipe 3 axially penetrates the pile body is not limited and can be selected according to actual needs.

[0064] Based on the above scheme, see Figures 2 to 5 , Figures 7 and 8 The outer diameter of the embedded pipe 3 is less than or equal to the radial distance from the stirrup 41 to the outer peripheral wall of the thin pile section 2, that is, the embedded pipe 3 is completely embedded in the pile body or partially embedded in the pile body. When completely embedded in the pile body, the outer wall of the embedded pipe 3 has a concrete protective layer, and the preferred thickness of the protective layer is 1.5 to 3.5 cm.

[0065] On the basis of the above scheme, both ends of the embedded pipe 3 are respectively provided with a male head and a female head for docking, so that when two prefabricated special-shaped piles 100 are docked in the vertical direction, the male head of the embedded pipe 3 of one and the female head of the embedded pipe 3 of the other can be quickly and accurately docked, and the shape and structure of the male head and the female head are not limited, as long as the two are compatible with each other.

[0066] See also Figure 4 , Figure 7 In order to prevent the soil from easily entering the slurry outlet 31 and blocking the slurry outlet 31 after the prefabricated special-shaped pile 100 is inserted into the foundation during the construction process, the slurry outlet 31 is provided with a detachable sealing member 311, and the sealing member 311 can be easily flushed out by the slurry when the slurry is discharged from the slurry outlet 31. The sealing member can be foam, a protective cover, a one-way valve or a tape, which is not strictly limited here, as long as it can meet the sealing function and can be flushed open by the slurry later.

[0067] Based on the above scheme, see Figures 5 to 13 The prefabricated special-shaped pile 100 also includes a grouting pipe 5 that can be movably inserted into the embedded pipe 3, see Fig.10 , Fig.12The grouting pipe 5 is provided with a grouting port 51 on the side wall near the bottom. The grouting method is to lower the grouting pipe 5 to a predetermined position and grout the branch pipe 33 at the position so that the slurry flows out from the specific slurry outlet 31 at the position, thereby achieving accurate grouting and saving slurry.

[0068] Based on the above scheme, see Figures 6 to 13 In order to better allow the slurry in the grouting port 51 to be exposed from the specific slurry outlet 31 and avoid leakage, the grouting pipe 5 is respectively installed with first sealing members 52 on both vertical sides of the grouting port 51. The first sealing members 52 can be circumferentially sealed to the inner circumferential wall of the embedded pipe 3 to ensure that the first sealing members 52 on both sides of the grouting port 51 can form an axial closed space, so that the slurry pressed out from the grouting port 51 can enter the specific branch pipe 33 located in the sealed space, while preventing the slurry from overflowing the closed space, thereby saving slurry.

[0069] On the basis of the above scheme, the installation form of the first sealing member 52 on the grouting pipe 5 is not limited, as long as the first sealing member 52 does not deviate from the original position during the vertical insertion of the grouting pipe 5 into the embedded pipe 3. Figures 6 to 13 The outer wall of the grouting pipe 5 is provided with a clamping member 53 embedded with the first sealing member 52. The shape, structure and setting method of the clamping member 53 are not strictly limited. Figures 6 to 13 The clamping member 53 includes fixed clamping platforms distributed on both sides of the vertical direction (i.e., vertically upward and downward) and arranged on the outer peripheral wall of the grouting pipe 5. The fixed clamping platform is an integrated or split (i.e., intermittently connected) clamping ring arranged around the outer peripheral wall of the grouting pipe 5. There is no limitation on whether the clamping platform and the embedded pipe 3 are integrated or split.

[0070] See also Figures 6 to 13 The specific structure, shape, material, etc. of the first sealing member 52 are not limited, as long as they can meet the sealing requirements. The preferred first sealing member 52 includes at least one of an airbag and a sealing ring, see Fig.12 The air bag is connected to the air pipe 54 to ensure that the first sealing member 52 is inflated at a predetermined position in the embedded pipe 3 to form a sealed space and grouting is performed through the grouting pipe 5. After the grouting is completed, the gas in the first sealing member 52 is released through the air pipe 54 so that the grouting pipe 5 can be vertically shifted to another predetermined position to be inflated again and grouting is performed at the other predetermined position.

[0071] See also Fig.10 The inner wall of the embedded pipe 3 is provided with a limit clamp 34 adapted to the first sealing member 52, so that when the grouting pipe 5 is lowered to a predetermined depth, the first sealing member 52 is just limited to the limit clamp 34, ensuring that the grouting material only flows toward the specific branch pipe 33 corresponding to the limit clamp 34 during grouting, and will not be sprayed toward the upper end port of the embedded pipe 3, nor will it be sprayed to the lower end of the embedded pipe 3. Fig.10The limiting clamping platform 34 is an arc-shaped structure with one end recessed. Of course, it can also be other recessed structures. There is no specific limitation as long as it can limit the first sealing member 52.

[0072] Based on the above scheme, see Figure 2 The end face of the pile body has a connection assembly hole 12 formed by a small screw sleeve 61 and a large screw sleeve 62 in the pre-embedded connection assembly 6, see Figure 18 to Figure 19 The connection assembly 6 includes a small screw sleeve 61 and a large screw sleeve 62 which are respectively arranged on the two end surfaces of the pile body and connected to the swaging head 42 of the main reinforcement 4, and also includes an elastic locking assembly 63 and a stop nut 64, wherein the small screw sleeve 61 is threadedly connected with an insertion rod 65, the insertion rod 65 has a plug-in end 651, and a socket cavity 621 is arranged in the large screw sleeve 62; the elastic locking assembly 63 is arranged in the socket cavity 621 and forms a plug-in channel, and is encapsulated in the socket cavity 621 by the stop nut 64; the elastic locking assembly 63 reversely locks the plug-in end 651 inserted into the plug-in channel. The plug-in end 651 has a circumferential recessed groove, and the elastic locking assembly 63 is circumferentially distributed in the socket cavity 621 of the large screw sleeve 62. The elastic locking assembly 63 includes an elastic member 631 and a locking member 632 arranged on the elastic member 631. When the plug rod 65 is inserted into the socket cavity 621, the elastic locking assembly 63 is compressed until the plug rod 65 is inserted into place, and the elastic locking assembly 63 rebounds. One side of the locking member 632 abuts against the plug-in end 651, and the other side abuts against the anti-slip nut 64 to achieve reverse locking. In this embodiment, the two ends of the prefabricated special-shaped pile 100 can be connected to the end of another prefabricated special-shaped pile 100 respectively. The connection through the connection assembly 6 of this embodiment makes the prefabricated special-shaped piles 100 have good pull-out and tensile properties.

[0073] On the basis of the above scheme, the two end faces, the outer wall and the connecting assembly 6 of the pile body are coated with an anti-corrosion layer, which can be an anti-corrosion material such as epoxy resin. Hoops are sleeved at both ends of the pile body to prevent the two ends of the pile body from being damaged when subjected to external force. The lower end of the pile body is connected to a pile tip, which is convenient for inserting into the foundation soil layer.

[0074] Embodiment 2

[0075] The same parts in this embodiment as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0076] See also Figures 14 to 17 Compared with the first embodiment, the present embodiment further adds a grout outlet 31 on the basis of the prefabricated special-shaped pile 100 in the first embodiment. The grout outlet 31 is located at the axial shoulder 11 of the embedded pipe 5 at the thick pile section 1, that is, the axial shoulder 11 of the embedded pipe 5 at the thick pile section 1 is provided with a grout outlet that can be connected to the outer wall of the pile body. Fig.16 , Fig.17, the slurry outlet 31 can be opened downward or upward, and the specific setting form is not limited here, as long as it can form a slurry channel. Preferably, the slurry outlet 31 is opened downward to ensure easy slurry discharge. In this embodiment, the "shaft shoulder" should be understood as the entire end face from the outer edge of the axial end face of the thick pile segment 1 to the thin pile segment 2. Therefore, when there is no transition surface between the thick pile segment 1 and the thin pile segment 2, the "shaft shoulder" should be understood as the axial end face of the thick pile segment 1; when there is a transition section between the two, the "shaft shoulder" should be understood as including the axial end face of the thick pile segment 1 and the end face of the transition section.

[0077] Embodiment 3

[0078] The same parts as those in the first and second embodiments of the present embodiment are given the same reference numerals, and the same text descriptions are omitted.

[0079] Compared with the first and second embodiments, this embodiment has the following differences.

[0080] See also Figure 20 to Figure 25 The prefabricated special-shaped pile also includes a joint assembly 7, which is provided with a connecting pipe 71 connected to the embedded pipe 3 and a positioning and mounting ring 72 fitted on the connecting pipe 71, and a receiving cavity 74 for accommodating the positioning and mounting ring 72 is provided at the upper end and / or lower end of the pile body.

[0081] In detail, the specific shapes, materials, lengths, etc. of the positioning and mounting ring 72 and the connecting pipe 71 are not strictly limited and can be determined according to actual needs, as long as the connecting pipe 71 can guide the slurry when the positioning and mounting ring 72 is installed on the upper and / or lower ends of the pile body. The setting form and size of the accommodating cavity 74 are not strictly required, as long as it can accommodate the positioning and mounting ring 72. The shape of the preferred accommodating cavity 74 is adapted to the positioning and mounting ring 72.

[0082] Based on the above scheme, see Fig.21 , Fig.24 In this embodiment, the joint assembly 7 is also provided with a second sealing member 73 which is sleeved on the connection pipe 71 to seal the connection part. A guide portion 741 is also provided at the upper end and / or lower end of the pile body. Preferably, the guide portion 741 is in a tapered trumpet shape. The guide portion 741 ensures that the joint assembly 7 is easily inserted, and the joint assembly 7 is sealed with the guide portion 741 through the second sealing member 73. The specific structure, shape, material, etc. of the second sealing member 73 are not limited, as long as they can meet the sealing requirements. Preferably, the structure of the second sealing member 73 is adapted to the guide portion 741 and the material is high-toughness rubber.

[0083] Based on the above scheme, see Fig.23 The sealing member 311 has a notch groove 311a for quick unsealing, see Fig.23The embedded pipe 3 near the slurry outlet 31 is provided with a control valve 312 for controlling the slurry to flow out of the slurry outlet 31. The type, structure and other characteristics of the control valve 312 are not strictly limited. The control valve 312 is preferably a solenoid valve.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. Prefabricated special-shaped piles, characterized in that: The invention comprises a pile body which is connected by thick pile segments and thin pile segments arranged alternately, and one or more embedded pipes buried along the length direction of the pile body, wherein the embedded pipe is provided with a slurry outlet which can be connected to the outer wall of the pile body at the axial shoulder of the thick pile segment and / or the thin pile segment.

2. The prefabricated special-shaped pile according to claim 1, characterized in that: A steel cage is provided in the pile body, and the steel cage includes a plurality of main bars arranged along the length direction of the pile body and stirrups circumferentially surrounding the plurality of main bars; Wherein, the embedded pipe is located outside the stirrup, and / or the embedded pipe runs through the pile body.

3. The prefabricated special-shaped pile according to claim 2, characterized in that: The outer diameter of the embedded pipe is less than or equal to the radial distance from the stirrup to the outer peripheral wall of the thin pile segment.

4. The prefabricated special-shaped pile according to claim 2, characterized in that: The two ends of the embedded pipe are respectively provided with a male connector and a female connector for docking; And / or, the slurry outlet is provided with a detachable sealing member.

5. The prefabricated special-shaped pile according to claim 1 or 2, characterized in that: It also includes a grouting pipe which is movably inserted in the embedded pipe, and a grouting port is opened on the side wall of the grouting pipe close to the bottom.

6. The prefabricated special-shaped pile according to claim 5, characterized in that: The grouting pipe is respectively provided with first sealing members on both vertical sides of the grouting port.

7. The prefabricated special-shaped pile according to claim 6, characterized in that: The outer wall of the grouting pipe is provided with a clamping member embedded with the first sealing member; And / or, the first sealing member includes at least one of an airbag and a sealing ring, wherein the airbag is connected to the trachea; And / or, the inner wall of the embedded pipe is provided with a limit clamp adapted to the first sealing member.

8. The prefabricated special-shaped pile according to claim 1, characterized in that: The two end surfaces of the pile body are equipped with connection components for docking, and the connection components include a small screw sleeve and a large screw sleeve respectively arranged on the two end surfaces of the pile body, and also include an elastic locking component and a locking nut. Wherein, the small screw sleeve is connected with an insert rod, the insert rod has an insert end, and the large screw sleeve is provided with a socket cavity; The elastic locking assembly is arranged in the socket cavity and forms a plug-in passage, and is encapsulated in the socket cavity by the anti-slip nut; The elastic locking assembly reversely locks the plug-in end inserted into the plug-in channel; And / or, both end surfaces of the pile body, the outer peripheral wall, and the connecting assembly are coated with an anti-corrosion layer; and / or, both ends of the pile body are covered with hoops; And / or, a pile tip is connected to the lower end of the pile body.

9. The prefabricated special-shaped pile according to claim 1, characterized in that: It also includes a joint assembly, which is provided with a connecting pipe connected to the embedded pipe and a positioning and mounting ring sleeved on the connecting pipe, and an accommodating cavity for accommodating the positioning and mounting ring is provided at the upper end and / or lower end of the pile body.

10. The prefabricated special-shaped pile according to claim 9, characterized in that: The joint assembly is also provided with a second sealing member which is sleeved on the connecting pipe and is used for sealing the connecting portion.

Images