An anchoring structure for support piles

Abstract

This utility model discloses an anchoring structure for a retaining pile, including an anchor hole formed on the side wall of the pile and extending to the foundation, a tubular anchoring tensioning platform, an anchor cable, and an anchor. The tubular anchoring tensioning platform is inserted into the anchor hole, and a grout stop plug is fixedly installed at one end of the tubular anchoring tensioning platform. The tubular anchoring tensioning platform has a through hole, and a grout filling hole is opened on the outer side wall of the other end of the tubular anchoring tensioning platform. The anchor cable passes through the through hole and extends to the bottom of the anchor hole. The anchor is matched with the anchor cable and is set at the other end of the tubular anchoring tensioning platform. Through the above configuration, the anchor cable and the pile body are connected, reducing the construction difficulty and cost, simplifying the operation steps, and improving the project quality.

Description

Technical Field

[0001] This utility model belongs to the field of support structure technology, specifically relating to an anchoring structure for support piles. Background Technology

[0002] Anchored piles are an engineering technique that uses pre-calculated tension to allow the anchor cables of anchored piles to resist horizontal and vertical forces from the foundation, thereby ensuring the safety and stability of buildings or other structures. They are widely used in projects such as bridge construction, tunnel engineering, foundation reinforcement, retaining walls, and slope protection.

[0003] In existing construction techniques, drilling is first performed on the foundation and cast-in-place support piles. After rust-proofing the anchor cables, grout is injected into the holes using grouting equipment. Then, the pile surface is treated, and a steel mesh for the pedestal is implanted into the pile surface. A formwork is then installed outside the steel mesh, and the pedestal is formed by pouring concrete. Finally, the anchor cables are tensioned using anchors, thereby transferring the structural load to the deep soil or rock mass, thus improving the stability and load-bearing capacity of the structure.

[0004] The above-mentioned scheme requires several steps to be carried out during construction, including cleaning the base surface, inserting steel bars, making formwork, and pouring concrete, after drilling, in order to build the pedestal. The operation steps are relatively complicated. Utility Model Content

[0005] The present invention aims to provide an anchoring structure for support piles to solve the problem of the complex operation steps of the above-mentioned solutions.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An anchoring structure for a retaining pile includes an anchor hole formed on the side wall of the pile body and extending to the foundation, and also includes a tubular anchoring tensioning platform, an anchor cable, and an anchor. The tubular anchoring tensioning platform is inserted into the anchor hole, and a grout stop plug is fixedly provided on the outer side wall of the end of the tubular anchoring tensioning platform that extends into the anchor hole. The tubular anchoring tensioning platform has a through hole along its axial direction, and a grout filling hole extending through the through hole is formed on the outer side wall of the other end of the tubular anchoring tensioning platform. The anchor cable passes through the through hole and extends to the bottom of the anchor hole. The anchor is engaged with the anchor cable and is provided at the other end of the tubular anchoring tensioning platform.

[0008] The principle and effects of this technical solution:

[0009] During construction, holes are first drilled into the sidewall of the pile body, and the drilled anchor holes are extended into the base. After the anchor holes are formed, anchor cables are inserted into the anchor holes. Then, a tubular anchor tensioning platform is fitted onto the anchor cables and inserted into the anchor holes. Grouting is performed in the gap between the outer wall of the tubular anchor tensioning platform above the grout stop plug and the inner wall of the anchor hole to form a micro-expansion grouting layer. Grouting is also performed in the through hole and the anchor hole below the grout stop plug to form a grouting layer. After the micro-expansion grouting layer and the grouting layer reach the design standard, the anchor cables are tensioned in conjunction with the anchors.

[0010] With the above setup, a tubular anchoring tensioning platform is inserted into the anchor hole, and a micro-expansion grouting layer is formed by grouting the gap between the outer wall of the tubular anchoring tensioning platform and the inner wall of the anchor hole. The above scheme connects the pile body through the prefabricated tubular anchoring tensioning platform and bears the reaction force generated when tensioning the anchor cable. The tubular anchoring tensioning platform has a simple on-site installation process, which reduces the construction difficulty and simplifies the operation steps while connecting the anchor cable and the pile body. At the same time, the use of tubular anchoring tensioning platforms produced in the factory can reduce construction costs and improve project quality.

[0011] In this invention, the other end of the tubular anchoring tensioning platform is provided with a first groove on the outer periphery of the through hole, which mates with the anchor. Through this arrangement, by engaging the anchor in the first groove, the anchor cable and the pile can be connected.

[0012] This invention also includes a variable-diameter pressure-bearing ring. A first groove, which mates with the variable-diameter pressure-bearing ring, is provided at the other end of the tubular anchoring tensioning platform on the outer periphery of the through hole. A second groove, which mates with the anchor, is provided at the end of the variable-diameter pressure-bearing ring away from the tubular anchoring tensioning platform. Through this arrangement, by securing the anchor in the second groove and the variable-diameter pressure-bearing ring in the first groove, the device can connect the anchor cable and the pile body while simultaneously being compatible with anchors of various diameters, thus improving its applicability.

[0013] In this invention, the anchor hole has a bamboo-joint section on the hole wall at the open end.

[0014] In this invention, the outer wall of the tubular anchoring tensioning platform is provided with anti-slip bars at intervals.

[0015] When drilling the pile body, an eccentric down-the-hole hammer is used for rotary impact, combined with intermittent non-rotational impact drilling to form a bamboo-like section in the hole wall. Before inserting the anchor cable, a thin-walled steel pipe is inserted into the bamboo-like section of the hole wall to avoid damage to the bamboo-like section of the hole wall when the anchor cable is lowered. After inserting the anchor cable, the thin-walled steel pipe is pulled out, and then grouting is carried out.

[0016] The above-mentioned setup enhances the connection between the micro-expansion grouting layer and the anchor hole and tubular anchor tensioning platform, thereby strengthening the connection between the tubular anchor tensioning platform and the pile body and improving the stability of the device during use.

[0017] In this invention, an end plate is fixedly installed at the other end of the tubular anchoring tensioning platform, and stiffening ribs are fixedly installed at intervals along the circumference of the outer side wall of the other end of the tubular anchoring tensioning platform. The stiffening ribs are fixedly connected to the end plate, and the grouting hole penetrates through the end plate. Through the above arrangement, the overall strength of the tubular anchoring tensioning platform can be improved by setting stiffening ribs and end plates, and the grouting hole can penetrate through the end plate, which facilitates the grouting operation of the anchor hole by the operator, thus improving the practicality of the device.

[0018] This invention also includes a reinforcing mesh, which is disposed within the pile body around the anchor hole and welded to the pile's reinforcing cage. When fabricating the pile's reinforcing cage, the reinforcing mesh is welded to it, and the center position of the mesh is marked before pouring concrete. During drilling, the anchor hole passes through the center of the mesh. This arrangement improves the pile's shear resistance.

[0019] In this invention, a sealing concrete layer is provided on the free sidewall of the pile body outside the anchorage and anchor cable. This sealing concrete layer protects the anchor cable and anchorage from corrosion or damage, ensuring the stability and durability of the device. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention in use.

[0021] Figure 2 This is a sectional view of the pile body of this utility model;

[0022] Figure 3 Disassembly of the components of this utility model Figure 1 ;

[0023] Figure 4 Disassembly of the components of this utility model Figure 2 . Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0025] The reference numerals in the accompanying drawings include: 10, pile body; 11, anchor hole; 111, bamboo-joint section of the hole wall; 20, tubular anchoring tensioning platform; 21, through hole; 22, grouting hole; 23, first slot; 24, anti-slip strip; 25, end plate; 26, stiffening rib; 30, grout stop plug; 40, anchor cable; 50, anchorage; 60, variable diameter bearing ring; 61, second slot; 70, steel mesh; 80, sealing concrete layer; 91, grouting layer; 92, micro-expansion grouting layer.

[0026] Example:

[0027] As attached Figure 1-3 As shown, this utility model discloses an anchoring structure for a support pile, including an anchor hole 11 opened on the side wall of the pile body 10 and extending to the base, and also including a tubular anchoring tensioning platform 20, an anchor cable 40 and an anchor 50. The tubular anchoring tensioning platform 20 is inserted into the anchor hole 11, and a grout stop plug 30 is fixedly provided on the outer side wall of the end of the tubular anchoring tensioning platform 20 that extends into the anchor hole 11. The tubular anchoring tensioning platform 20 is provided with a through hole 21 along its axial direction. A grout filling hole 22 is opened on the outer side wall of the other end of the tubular anchoring tensioning platform 20, which extends to the through hole 21. The anchor cable 40 passes through the through hole 21 and extends to the bottom of the anchor hole 11. The anchor 50 cooperates with the anchor cable 40 and is provided at the other end of the tubular anchoring tensioning platform 20.

[0028] In this embodiment, the other end of the tubular anchoring tensioning platform 20 is provided with a first groove 23 that cooperates with the anchor 50 on the outer periphery of the through hole 21.

[0029] In this embodiment, the anchor hole 11 has a bamboo-joint section 111 on the open end of the hole wall.

[0030] In this embodiment, the outer side wall of the tubular anchoring tensioning platform 20 is provided with anti-slip bars 24 at intervals.

[0031] In this embodiment, an end plate 25 is fixedly provided at the other end of the tubular anchoring tensioning platform 20, and stiffening ribs 26 are fixedly provided at intervals along the circumference of the outer side wall of the other end of the tubular anchoring tensioning platform 20. The stiffening ribs 26 are fixedly connected to the end plate 25, and the grouting hole 22 penetrates the end plate 25.

[0032] In this embodiment, a steel mesh 70 is also included. The steel mesh 70 is disposed in the pile body 10 on the outer periphery of the anchor hole 11 and is welded to the steel cage of the pile body 10.

[0033] In this embodiment, the free sidewall of the pile body 10 is provided with a sealing concrete layer 80 outside the anchor 50 and the anchor cable 40.

[0034] The specific implementation process is as follows:

[0035] During construction, holes are first drilled on the side wall of the pile body 10, and the drilled anchor holes 11 are extended into the base. After the anchor holes 11 are formed, the anchor cable 40 is inserted into the anchor holes 11. Then, the tubular anchor tensioning platform 20 is fitted onto the anchor cable 40 and inserted into the anchor hole 11. Grouting is performed in the gap between the outer wall of the tubular anchor tensioning platform 20 above the grout stop plug 30 and the inner wall of the anchor hole 11 to form a micro-expansion grouting layer 92. Grouting is also performed in the through hole 21 and the anchor hole 11 below the grout stop plug 30 to form a grouting layer 91. After the strength of the micro-expansion grouting layer 92 and the grouting layer 91 reaches the design standard, the anchor cable 40 is tensioned in conjunction with the anchor 50.

[0036] When drilling the pile body 10, an eccentric down-the-hole hammer is used for rotary impact, combined with intermittent non-rotational impact drilling to form a bamboo-joint section 111 in the hole wall. Before inserting the anchor cable 40, a thin-walled steel pipe is inserted into the bamboo-joint section 111 in the hole wall to avoid damage to the bamboo-joint section 111 in the hole wall when the anchor cable 40 is lowered. After inserting the anchor cable 40, the thin-walled steel pipe is pulled out, and then grouting is carried out.

[0037] Second embodiment:

[0038] As attached Figure 4 As shown, the difference between this embodiment and the first embodiment is that: in this embodiment, a variable diameter bearing ring 60 is also included. The other end of the tubular anchoring tensioning platform 20 is provided with a first groove 23 that cooperates with the variable diameter bearing ring 60 on the outer periphery of the through hole 21. The end of the variable diameter bearing ring 60 away from the tubular anchoring tensioning platform 20 is provided with a second groove 61 that cooperates with the anchor 50.

[0039] The specific implementation process is as follows: the anchor 50 is locked in the second slot 61, and the variable diameter bearing ring 60 is locked in the first slot 23.

[0040] In the above embodiments, the pile body 10 is connected by a prefabricated tubular anchor tensioning platform 20 to replace the reaction force generated when the original concrete platform bears the tensioning anchor cable 40. Compared with the additional processes such as base surface cleaning, steel bar insertion, and formwork making required for on-site construction of the concrete platform, the tubular anchor tensioning platform 20 has a simple on-site installation process, reducing construction difficulty and simplifying operation steps. At the same time, using the tubular anchor tensioning platform 20 produced in the factory can reduce construction costs and improve project quality.

[0041] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0042] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An anchoring structure for a support pile, comprising anchor holes formed in the sidewall of the pile body and extending into the foundation, characterized in that, Also includes: A tubular anchoring tensioning platform is inserted into an anchor hole, and a grout stop plug is fixedly provided on the outer wall of the end of the tubular anchoring tensioning platform that extends into the anchor hole. A through hole is provided along the axial direction of the tubular anchoring tensioning platform, and a grout filling hole is opened on the outer wall of the other end of the tubular anchoring tensioning platform that extends through the through hole. An anchor cable, which passes through the through hole and extends to the bottom of the anchor hole; An anchorage, which cooperates with the anchor cable and is located at the other end of the tubular anchoring tensioning platform.

2. The anchoring structure for the support pile as described in claim 1, characterized in that: The other end of the tubular anchor tensioning platform is provided with a first groove that mates with the anchor at the outer periphery of the through hole.

3. The anchoring structure for the support pile as described in claim 1, characterized in that: It also includes a variable diameter pressure bearing ring. The other end of the tubular anchor tensioning platform is provided with a first groove that mates with the variable diameter pressure bearing ring on the outer periphery of the through hole. The end of the variable diameter pressure bearing ring away from the tubular anchor tensioning platform is provided with a second groove that mates with the anchor.

4. The anchoring structure for the support pile as described in claim 2 or 3, characterized in that: The anchor hole has a bamboo-joint section on the hole wall at the open end.

5. The anchoring structure for the support pile as described in claim 4, characterized in that: The outer wall of the tubular anchoring tensioning platform is provided with anti-slip bars at intervals.

6. The anchoring structure for the support pile as described in claim 5, characterized in that: An end plate is fixedly installed at the other end of the tubular anchor tensioning platform, and stiffening ribs are fixedly installed at intervals along the circumference of the outer side wall of the other end of the tubular anchor tensioning platform. The stiffening ribs are fixedly connected to the end plate, and the grouting hole penetrates the end plate.

7. The anchoring structure for the support pile as described in claim 5, characterized in that: It also includes a steel mesh, which is set inside the pile body on the outer periphery of the anchor hole and welded to the steel cage of the pile body.

8. The anchoring structure for the support pile as described in claim 5, characterized in that: The free sidewall of the pile body is provided with a sealing concrete layer outside the anchor and anchor cable.

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