A prefabricated bored pile support structure

Abstract

The embodiment of the present application provides a prefabricated assembled bored pile support structure, including: reinforced concrete prefabricated components for supporting hole walls and anchors for fixing the prefabricated components; the prefabricated components include a well ring and a cylindrical protective wall with a hollow structure, the protective wall is spliced ​​by an annular segment plate and a plurality of arc segment plates, the inner mouth of the well ring is fixedly connected to the top of the annular segment plate, and the prefabricated components are connected to the soil layer by anchors; the present application can be installed by manually pushing horizontally with a small crane during the installation process, the operation is simple, and the assembly time and cost are saved, and it is suitable for the field of pile foundation engineering technology.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation engineering, and in particular to a prefabricated assembled bored pile support structure. Background Art

[0002] At present, bored piles are generally excavated by manpower or small mechanical equipment. After the well hole is pre-excavated to a certain depth, the well wall support structure must be constructed in time. When excavating the pile foundation, especially the deep pile foundation, it is easy to cause safety accidents due to the collapse of the well wall. Therefore, a stable support system should be formed as quickly as possible after the lower excavation is completed.

[0003] Common pile foundation shaft wall support methods include cast-in-place method and prefabrication method. The implementation process of cast-in-place method includes laying steel cage, installing formwork, pouring concrete, removing formwork after the strength reaches the design requirements, and then continuing to dig downward. The technical support system of cast-in-place method is relatively slow to form, and the wall protection construction period is long, which becomes the controlling period of pile foundation construction.

[0004] The prefabrication method saves time for concrete pouring and curing, and theoretically has a relatively high efficiency. The prefabrication method generally uses multiple prefabricated curved plates to splice into a circular barrel-shaped retaining wall underground. According to the material of the curved plate, it is divided into two categories: steel structure and concrete structure. The steel structure support structure is expensive and requires high assembly accuracy. The weight of a single plate of the concrete structure is large, and the operating space at the bottom of the pile foundation working well is limited, so mechanical operation cannot be used. It is difficult to adjust a single plate, and the circular assembly steps are complicated. Therefore, the efficiency is not high and the engineering practicality is poor. The prefabrication method has poor operability in pile foundation construction and is seldom used.

[0005] Therefore, it is necessary to propose a new bored pile prefabricated support structure system to solve the problems of difficult assembly and low efficiency in conventional prefabrication methods, and give full play to the advantages of the prefabrication system such as high efficiency, fast assembly and safe use. Summary of the invention

[0006] In order to solve one of the above-mentioned technical defects, a prefabricated assembled bored pile support structure is provided in the embodiment of the present application.

[0007] According to one aspect of an embodiment of the present application, a prefabricated assembled bored pile support structure is provided, characterized in that it includes: reinforced concrete prefabricated components for supporting hole walls and anchors for fixing the prefabricated components; the prefabricated components include a well ring and a cylindrical protective wall with a hollow structure, the cylindrical protective wall is spliced ​​by an annular segment plate and a plurality of arc segment plates, the inner mouth of the well ring is fixedly connected to the top of the annular segment plate, and the prefabricated components are connected to the soil layer by anchors.

[0008] Preferably, at least two protrusions extend from the bottom of the annular segment plate, and an opening is formed between two adjacent protrusions;

[0009] The arc segment plate includes: a first arc segment plate and a second arc segment plate, the first arc segment plate is located in the opening, and the bottom end of the first arc segment plate extends out of the opening; the second arc segment plate is located at the bottom of the protruding portion; the first arc segment plate and the second arc segment plate form a ring.

[0010] Preferably, the number of the protrusions is two, and the two protrusions are symmetrically arranged.

[0011] Preferably, the protruding portion and the opening portion have the same circumferential length, and the first arc segment plate and the second arc segment plate have the same circumferential length.

[0012] Preferably, the first arc segment plate and the second arc segment plate have the same height.

[0013] The first arc segment plate and the second arc segment plate are connected via a mortise and tenon structure; the first arc segment plate and the annular segment plate are connected via a mortise and tenon structure.

[0014] Preferably, the arc segment plate further comprises: an end arc segment plate having the same circumferential length as the first arc segment plate;

[0015] The terminal arc segment plate is arranged at the bottom of the first arc segment plate, and the bottom of the terminal arc segment plate is flush with the bottom of the second arc segment plate.

[0016] Preferably, the terminal arc segment plate and the second arc segment plate are connected via a mortise and tenon structure.

[0017] Preferably, the multiple arc segment plates are all lidless arc box structures, the upper and lower surfaces of the first arc segment plate are symmetrically arranged first fan plate and second fan plate, the first fan plate is in contact with the bottom of the annular segment plate, the second fan plate is in contact with the top of the end arc segment plate, the radius of the first fan plate matches the radius of the contact surface of the annular segment plate, both sides of the first arc segment plate are rectangular plates, the rectangular plates are provided with mortise and tenon structures, and the back of the first arc segment plate is an arc plate.

[0018] Preferably, at least one fan-shaped rib is provided between the first fan-shaped plate and the second fan-shaped plate, and the fan-shaped ribs are symmetrically arranged with respect to the first fan-shaped plate and the second fan-shaped plate.

[0019] Preferably, protrusions are provided at the bottom extension of the annular segment plate and the extension of the second fan-shaped plate, and a limiting groove matching the protrusion is provided at the extension of the first fan-shaped plate. When the annular segment plate, the first arc segment plate, the second arc segment plate and the end arc segment plate are spliced ​​together up and down, the protrusion is located in the limiting groove, limiting the outward movement of the first arc segment plate, the second arc segment plate and the end arc segment plate.

[0020] Preferably, the anchoring piece comprises: a precision-rolled threaded steel bar and a connecting piece, wherein the connecting piece is located on the annular segment plate and is provided with an opening, and the precision-rolled threaded steel bar passes through the annular segment plate through the opening and is implanted into the soil layer.

[0021] Preferably, the annular segment plate, the first arc segment plate, the second arc segment plate and the end arc segment plate are all standard segment plates, and matching tenon structures are provided on both sides of the two openings, both sides of the two first arc segment plates, both sides of the two second arc segment plates and both sides of the two end arc segment plates.

[0022] Preferably, the supporting structure comprises: epoxy resin AB, and the epoxy resin AB is used to bond the joints of the prefabricated component retaining wall.

[0023] Preferably, the supporting structure comprises: grouting material, and the grouting material is used to fill the gap between the prefabricated component and the soil layer.

[0024] A prefabricated assembled bored pile support structure provided in the embodiment of the present application is adopted, and the annular segment plates and the arc segment plates adopt a mortise and tenon connection structure system of "up and down staggered" and "left and right interlocked", and the upper existing installation support structure serves as the support and guide structure of the lower support structure. During the installation process, the installation can be completed by manually pushing horizontally with a small crane, and the operation is simple; the "mortise and tenon method" is adopted for assembly between the plates, which eliminates the step of fixing bolts, simplifies the construction steps, and saves assembly time; the arc segment plates are staggered to increase the overlap, which is beneficial to the overall force of the support structure; the reinforced concrete structure arc plate adopts an uncovered arc box structure, and the force is clear, which greatly reduces the weight of the plate and saves engineering costs; manual bored piles can adopt half-section excavation and installation of retaining walls, reducing engineering risks.

[0025] In order to address the shortcomings of the obvious separation effect between the prefabricated retaining wall and the soil outside the well wall and the inability to fit closely, after the prefabricated retaining wall is assembled, cement slurry is injected into the outside of the retaining wall to eliminate the gap between the retaining wall and the original soil, reduce the deformation of the surrounding soil, and achieve the effect of shared force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A schematic structural diagram of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the plan structure of a prefabricated bored pile support structure provided in an embodiment of the present application;

[0029] Figure 3 A schematic structural diagram of an annular segment plate of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0030] Figure 4 A schematic structural diagram of a first arc-shaped segment plate of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0031] Figure 5 A schematic structural diagram of a second arc segment plate of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of an end arc segment plate of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of the structure of a standard segment plate of a prefabricated assembled bored pile support structure provided in an embodiment of the present application;

[0034] Figure 8 A schematic structural diagram of a support structure assembled using standard segment plates provided in an embodiment of the present application.

[0035] In the figure:

[0036] 10 is a prefabricated component, 101 is a well ring, 102 is a retaining wall, 103 is an annular segment plate, 1031 is an opening, 104 is a first arc segment plate, 1041 is a mortise and tenon structure, 1042 is a first fan plate, 1043 is a second fan plate, 1044 is a rectangular plate, 1045 is an arc plate, 1046 is a fan rib plate, 105 is a second arc segment plate, 106 is a terminal arc segment plate, 107 is a protrusion, and 108 is a limiting groove;

[0037] 20 is an anchor, 201 is a finished rolled threaded steel bar, 202 is a connecting piece, and 203 is an opening;

[0038] 30 is a standard segment plate, and 301 is a tenon structure. DETAILED DESCRIPTION

[0039] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the process of realizing this application, the inventor found that bored piles are currently generally excavated by manpower or small mechanical equipment. After the well hole is pre-excavated to a certain depth, the well wall support structure must be promptly constructed. When excavating the pile foundation, especially the deep pile foundation, it is easy to cause safety accidents due to the collapse of the well wall. Therefore, a stable support system should be formed as quickly as possible after the lower excavation is completed.

[0041] Common pile foundation shaft wall support methods include cast-in-place method and prefabrication method. The implementation process of cast-in-place method includes laying steel cage, installing formwork, pouring concrete, removing formwork after the strength reaches the design requirements, and then continuing to dig downward. The technical support system of cast-in-place method is relatively slow to form, and the wall protection construction period is long, which becomes the controlling period of pile foundation construction.

[0042] However, the existing prefabrication method saves time for concrete pouring and curing, and theoretically has a relatively high efficiency. The prefabrication method generally uses multiple prefabricated curved plates to splice into a circular barrel-shaped retaining wall underground. According to the material of the curved plate, it is divided into two categories: steel structure and concrete structure. The steel structure support structure is expensive and requires high assembly accuracy. The weight of a single plate of the concrete structure is large, and the operating space at the bottom of the pile foundation working well is limited, so mechanical operation cannot be used. It is difficult to adjust a single plate, and the circular assembly steps are complicated. Therefore, the efficiency is not high and the engineering practicality is poor. The prefabrication method has poor operability in pile foundation construction and is seldom used.

[0043] In response to the above problems, a prefabricated and assembled bored pile support structure is provided in an embodiment of the present application. The support structure is based on the principle of the mortise and tenon method. The annular segment plates and the arc segment plates adopt a mortise and tenon connection structure system of "up and down staggered" and "left and right interlocked". The upper existing installation support structure serves as a support and guide structure for the lower support structure. During the installation process, the installation can be completed by manually pushing horizontally with a small crane, and the operation is simple; the "mortise and tenon method" is adopted for assembly between the panels, which eliminates the step of fixing bolts, simplifies the construction steps, and saves assembly time; the arc segment plates are staggered to increase the overlap, which is beneficial to the overall force of the support structure and reduces engineering risks.

[0044] Embodiment 1

[0045] like Figure 1As shown, a prefabricated assembled bored pile support structure includes: a reinforced concrete prefabricated component 10 for supporting the hole wall and an anchor 20 for fixing the prefabricated component; the prefabricated component includes a well ring 101 and a cylindrical protective wall 102 with a hollow structure, the cylindrical protective wall 102 is spliced ​​by an annular segment plate 103 and a plurality of arc segment plates, the inner mouth of the well ring 101 is fixedly connected to the top of the annular segment plate 103, and the prefabricated component 101 is connected to the soil layer by the anchor 20.

[0046] In the present application, the well ring 101, the annular segment plate 103 and multiple arc segment plates are all prefabricated parts, and the well ring 101 and the annular segment plate 103 are integrated; when in use, first dig into the soil layer, and after the installation depth requirement of the annular segment plate 103 is met, the annular segment plate 103 integrated with the well ring 101 is hoisted, the well ring 101 is located outside the wellhead to lock the wellhead, and then the annular segment plate 103 is fixed by the anchor 20, and then continue to dig into the soil layer. After digging to a certain depth, start to hoist the arc segment plates. The arc segment plates all pass through the center of the well ring 101, move downward into place and start splicing. The number of arc segment plates depends on the excavation depth. After the overall wall protection is completed, the internal concrete pile foundation is cast as a whole; during the installation process, the present application can be installed by manually pushing horizontally with a small crane, which is easy to operate and saves assembly time and cost.

[0047] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a prefabricated bored pile support structure is provided, wherein at least two protrusions extend from the bottom of the annular segment plate 103, and an opening is formed between two adjacent protrusions.

[0048] The arc segment plate includes: a first arc segment plate 104 and a second arc segment plate 105. The first arc segment plate 104 is located in the opening, and the bottom end of the first arc segment plate 104 extends out of the opening. The second arc segment plate 105 is located at the bottom of the protruding portion, and the first arc segment plate 104 and the second arc segment plate 105 form a ring.

[0049] A specific solution is: the number of the protrusions is two, and the two protrusions are symmetrically arranged, and the number of the openings is also two, and the two openings are symmetrically arranged.

[0050] A specific solution is that the circumferential lengths of the protrusion and the opening are equal, and the circumferential lengths of the first arc segment plate 104 and the second arc segment plate 105 are equal. Then the first arc segment plate 104 and the second arc segment plate 105 can adopt the same structure and can be manufactured using the same mold, which simplifies the difficulty of design and production.

[0051] A specific solution is: the heights of the first arc segment plate 104 and the second arc segment plate 105 along the axial direction of the annular segment plate are equal. Then, after the first arc segment plate 104 and the second arc segment plate 105 are respectively installed in the opening and the protruding portion, the two are staggered with each other. Part of the first arc segment plate 104 is connected to the annular segment plate, and the other part is connected to the second arc segment plate 105.

[0052] Furthermore, the first arc segment plate (104) and the second arc segment plate (105) are connected via a mortise and tenon structure 1041; and the first arc segment plate (104) and the annular segment plate (103) are connected via a mortise and tenon structure 1041.

[0053] As a preferred solution, because the first arc segment plate 104 and the second arc segment plate 105 are of the same height, two symmetrical openings 1031 are provided at the bottom of the annular segment plate 103, so that the first arc segment plate 104 and the second arc segment plate 105 can be staggered and spliced ​​up and down, and the joints are all matched mortise and tenon structures 1041; a mortise and tenon connection structure system is formed that is staggered up and down and interlocked left and right, and the installation can be completed by manually pushing horizontally with a small crane during the installation process, and the operation is simple; the present application basically eliminates the bolt connection and steel pipe support operations, greatly simplifies the construction steps, and saves assembly time; the support structure has strong integrity and good force-bearing effect.

[0054] As a preferred option, when manually digging bored piles, half-section excavation can be adopted, and the other section can be excavated after installing any arc segment plate support to reduce engineering risks.

[0055] like Figure 6 As shown, a prefabricated bored pile support structure, the arc segment plate also includes: an end arc segment plate 106, which has a circumferential length equal to that of the first arc segment plate 104; the end arc segment plate 106 is arranged at the bottom of the first arc segment plate 104, and the bottom of the end arc segment plate 106 is flush with the bottom of the second arc segment plate 105;

[0056] The end arc segment plate 106 and the second arc segment plate 105 are connected by a mortise and tenon structure 1041;

[0057] As a preferred solution, after reaching the excavation depth requirement, since the first arc segment plate 104 and the second arc segment plate 105 are staggered up and down, there is still a gap between the second arc segment plates 105. At this time, it is necessary to assemble the end arc segment plate 106 at the bottom. Since the height of the end arc segment plate 106 matches the distance between the bottom end of the first arc segment plate 104 and the bottom end of the second arc segment plate 105, the end arc segment plate 106 cooperates to form a complete support structure.

[0058] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a prefabricated assembled bored pile support structure, multiple arc segment plates are all uncovered arc box structures, the upper and lower surfaces of the first arc segment plate 104 are symmetrically arranged first fan plate 1042 and second fan plate 1043, the first fan plate 1042 is in contact with the bottom of the annular segment plate 103, the second fan plate 1043 is in contact with the top of the end arc segment plate 106, the radius of the first fan plate 1042 matches the radius of the contact surface of the annular segment plate 103, both sides of the first arc segment plate 104 are rectangular plates 1044, the rectangular plates 1044 are provided with mortise and tenon structures 1041, and the back of the first arc segment plate 104 is an arc plate 1045.

[0059] At least one fan-shaped rib 1046 is disposed between the first fan-shaped plate 1042 and the second fan-shaped plate 1043 , and the fan-shaped ribs 1046 are symmetrically arranged with respect to the first fan-shaped plate 1042 and the second fan-shaped plate 1043 .

[0060] As a preferred solution, the arc segment plate as a whole is an uncovered arc box structure, and the upper and lower surfaces are both fan-shaped plates. After the arc segment plates are spliced ​​together, isosceles trapezoidal reinforcing ribs can be formed, which have the function of strengthening the structural force. Fan-shaped ribs 1046 can also be directly added to the first fan plate 1042 and the second fan plate 1043 to enhance the structural force. The number of fan-shaped ribs 1046 is not limited.

[0061] like Figure 3 , Figure 4 and Figure 5 As shown, a protrusion 107 is provided at the bottom extension of the annular segment plate 103 and the extension of the second fan plate 1043, and a limiting groove 108 matching the protrusion 107 is provided at the extension of the first fan plate 1042. When the annular segment plate 103, the first arc segment plate 104, the second arc segment plate 105 and the terminal arc segment plate 106 are spliced ​​together up and down, the protrusion 107 is located in the limiting groove 108, limiting the outward movement of the first arc segment plate 104, the second arc segment plate 105 and the terminal arc segment plate 106.

[0062] As a preferred solution, during the installation process, the arc segment plate is manually pushed horizontally with the cooperation of a small crane. Since there is a limiting groove 108 on the top of the arc segment plate, and there are protrusions 107 on the bottom of the annular segment plate 103 and the bottom of the arc segment plate, when the arc segment plate moves outward and the protrusion 107 is located in the limiting groove 108, the arc segment plate stops moving outward and is installed in place.

[0063] like Figure 1 and Figure 3As shown, a prefabricated assembled bored pile support structure, the anchor 20 includes: a finely rolled threaded steel bar 201 and a connecting piece 202, the connecting piece 202 is located on the annular segment plate 103, and an opening 203 is provided on the connecting piece 202, the finely rolled threaded steel bar 201 passes through the annular segment plate 103 through the opening 203 and is implanted into the soil layer.

[0064] As a preferred solution, the connecting member 202 can be formed integrally with the annular segment plate 103, and an opening 203 is set on the connecting member 202, and the fine-rolled threaded steel 201 passes through the opening 202 on the connecting member and penetrates into the soil layer to fix the annular segment plate 103; the connecting member 202 can also be omitted, and the opening 203 is directly reserved on the annular segment plate 103, and the fine-rolled threaded steel 201 directly passes through the opening 203 and penetrates into the soil layer to fix the annular segment plate 103.

[0065] like Figure 7 and Figure 8 As shown, a prefabricated assembled bored pile support structure includes: an annular segment plate 103, a first arc segment plate 104, a second arc segment plate 105 and an end arc segment plate 106 are all standard segment plates 30, and both sides of the two openings 1031, both sides of the two first arc segment plates 104, both sides of the two second arc segment plates 105 and both sides of the two end arc segment plates 106 are provided with matching tenon structures 301.

[0066] As a preferred solution, the annular segment plate 103, the first arc segment plate 104, the second arc segment plate 105 and the end arc segment plate 106 are all standard segment plates 30, and the joints between the standard segment plates 30 are all matching tenon structures 301. The standard segment plates 30 have a simple structure and are easier to produce and assemble.

[0067] As a preferred solution, epoxy resin AB is applied to the joints between the annular segment plate (103) and the plurality of arc segment plates to increase the strength of the support structure.

[0068] As a preferred solution, after each layer of the annular structure is assembled, grouting material is poured into the gap between the arc plate and the original soil by grouting to eliminate the gap between the retaining wall and the original soil, reduce the deformation of the surrounding soil, and achieve the effect of shared force.

[0069] In the description of the present application, it should be understood that the terms "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this application, unless otherwise clearly specified and limited, the terms "splicing", "fixing" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A prefabricated bored pile support structure, characterized in that: include: A reinforced concrete prefabricated component (10) for supporting a hole wall and an anchor (20) for fixing the prefabricated component; the prefabricated component (10) comprises a well ring (101) and a cylindrical protective wall (102) with a hollow structure, the cylindrical protective wall (102) being formed by splicing an annular segment plate (103) and a plurality of arc segment plates, the inner opening of the well ring (101) being fixedly connected to the top of the annular segment plate (103), and the prefabricated component (10) being connected to a soil layer via an anchor (20); At least two protrusions extend from the bottom of the annular segment plate (103), and an opening is formed between two adjacent protrusions; The arc segment plate comprises: a first arc segment plate (104), a second arc segment plate (105) and a terminal arc segment plate (106); the first arc segment plate (104) is located in the opening, and the bottom end of the first arc segment plate (104) protrudes out of the opening; the second arc segment plate (105) is located at the bottom of the protruding portion; the first arc segment plate (104) and the second arc segment plate (105) form a ring; The multiple arc segment plates are all lidless arc box structures, the upper and lower surfaces of the first arc segment plate (104) are symmetrically arranged with a first fan plate (1042) and a second fan plate (1043), the first fan plate (1042) is in contact with the bottom of the annular segment plate (103), the second fan plate (1043) is in contact with the top of the terminal arc segment plate (106), the radius of the first fan plate (1042) matches the radius of the contact surface of the annular segment plate (103), both sides of the first arc segment plate (104) are rectangular plates (1044), the rectangular plates (1044) are provided with mortise and tenon structures (1041), and the back of the first arc segment plate (104) is an arc plate (1045); A protrusion (107) is provided at the bottom extension of the annular segment plate (103) and at the extension of the second sector plate (1043); a limiting groove (108) matching the protrusion (107) is provided at the extension of the first sector plate (1042); when the annular segment plate (103), the first arc segment plate (104), the second arc segment plate (105) and the terminal arc segment plate (106) are spliced ​​together from top to bottom, the protrusion (107) is located in the limiting groove (108), limiting the outward movement of the first arc segment plate (104), the second arc segment plate (105) and the terminal arc segment plate (106).

2. The prefabricated bored pile support structure according to claim 1, characterized in that: The number of the protrusions is two, and the two protrusions are symmetrically arranged.

3. The prefabricated bored pile support structure according to claim 2 is characterized in that: The circumferential lengths of the protruding portion and the opening portion are equal, and the circumferential lengths of the first arc segment plate (104) and the second arc segment plate (105) are equal.

4. The prefabricated assembled bored pile support structure according to any one of claims 2 to 3, characterized in that: The first arc segment plate (104) and the second arc segment plate (105) have the same height.

5. The prefabricated assembled bored pile support structure according to any one of claims 2 to 3, characterized in that: The first arc segment plate (104) and the second arc segment plate (105) are connected via a mortise and tenon structure (1041); and the first arc segment plate (104) and the annular segment plate (103) are connected via a mortise and tenon structure (1041).

6. The prefabricated bored pile support structure according to claim 4, characterized in that: The circumferential lengths of the terminal arc segment plate (106) and the first arc segment plate (104) are equal; The end arc segment plate (106) is arranged at the bottom of the first arc segment plate (104), and the bottom of the end arc segment plate (106) is flush with the bottom of the second arc segment plate (105).

7. The prefabricated bored pile support structure according to claim 4, characterized in that: The end arc segment plate (106) and the second arc segment plate (105) are connected via a mortise and tenon structure (1041).

8. The prefabricated bored pile support structure according to claim 6 or 7, characterized in that: At least one fan-shaped rib (1046) is provided between the first fan-shaped plate (1042) and the second fan-shaped plate (1043), and the fan-shaped ribs (1046) are symmetrically arranged with respect to the first fan-shaped plate (1042) and the second fan-shaped plate (1043).

9. The prefabricated assembled bored pile support structure according to claim 1, characterized in that: The anchor (20) comprises: a finely rolled threaded steel bar (201) and a connecting piece (202); the connecting piece (202) is located on the annular segment plate (103), and an opening (203) is provided on the connecting piece (202); the finely rolled threaded steel bar (201) passes through the annular segment plate (103) through the opening (203) and is implanted into the soil layer.

10. The prefabricated assembled bored pile support structure according to any one of claims 6-7, characterized in that: The annular segment plate (103), the first arc segment plate (104), the second arc segment plate (105) and the terminal arc segment plate (106) are all standard segment plates (30), and matching tenon structures (301) are provided on both sides of the two openings (1031), on both sides of the two first arc segment plates (104), on both sides of the two second arc segment plates (105) and on both sides of the two terminal arc segment plates (106).

11. The prefabricated bored pile support structure according to claim 1, characterized in that: include: Epoxy resin AB, the epoxy resin AB is used to bond the annular segment plate (103) and the plurality of arc segment plates.

12. The prefabricated bored pile support structure according to claim 1, characterized in that: include: Grouting material, the grouting material is used to fill the gap between the prefabricated component (10) and the soil layer.

Images