Expanded head anchoring device

Abstract

The utility model discloses an expansion head anchoring device which comprises a central pipe, a base and a sleeve, the base is assembled at the bottom of the central pipe, the diameter of the bottom of the base is larger than that of the central pipe, a plurality of steel bars are arranged on the periphery of the central pipe in a surrounding mode, and a plurality of guide pipes are arranged on the periphery of the base. The number of the guide pipes corresponds to the number of the steel bars surrounding the center pipe, the lower portions of the steel bars surrounding the center pipe can be inserted into the guide pipes surrounding the base, a plurality of anchor cables are inserted into an inner cavity of the center pipe, and the upper portion of the center pipe and the top ends of the steel bars surrounding the center pipe are sleeved with the sleeve. The device has the beneficial effect that the load can be effectively transmitted to a stratum with higher bearing capacity. The construction efficiency is further improved, and the construction cost and the human input are reduced. Design parameters can be flexibly adjusted, and flexible adjustment can be carried out according to requirements and stress conditions of specific engineering.

Description

Technical Field

[0001] This utility model relates to an anchoring device, and more particularly to an enlarged head anchoring device. Background Technology

[0002] Currently, slope areas are an important part of related projects. Slope protection structures need to be installed to reinforce slopes to prevent soil or rock sliding and collapse, ensure slope stability and safety, and prevent geological disasters such as slope instability, landslides, and erosion caused by natural factors or human activities.

[0003] Ordinary anchor bolts mainly rely on the bond friction between the anchor bolt body and the surrounding rock and soil to provide anchoring force. Their anchoring section length is limited, the bearing mechanism is unclear, and the bonding effect is poor under some weak or loose geological conditions, so the tensile force they can bear is relatively small. When facing greater pull-out resistance requirements, it is necessary to increase the length and number of anchor bolts, which not only increases costs but may also be difficult to implement due to limitations such as construction site conditions.

[0004] The anchoring quality of ordinary anchor cables in soil and rock masses, such as the bonding effect between the anchoring section and the soil and rock mass, and the actual stress state of the anchor cable, is difficult to accurately judge through visual means. Although some testing methods, such as pull-out tests, can be used to evaluate their performance, these tests often only reflect the local situation at a certain stage, making it difficult to comprehensively and accurately grasp the true quality status of the anchor cable during long-term use. This introduces a certain degree of uncertainty into ensuring the long-term reliable anchoring of the anchor cable.

[0005] In the past, in some actual engineering projects, anchoring failure has caused engineering accidents or structural durability problems of varying degrees. Through the analysis and summary of these cases, it has been found that there is an urgent need for an anchoring device with stronger anchoring force, higher reliability and adaptability to a variety of complex geological conditions, in order to make up for the shortcomings of existing anchoring technology. Summary of the Invention

[0006] The main purpose of this utility model is to provide an enlarged head anchoring device to solve many problems existing in the current anchoring technology.

[0007] The enlarged head anchoring device provided by this utility model includes a central tube, a base, and a sleeve. The base is assembled at the bottom of the central tube, and the diameter of the bottom of the base is larger than the diameter of the central tube. Several steel bars are arranged around the perimeter of the central tube. Several guide tubes are arranged around the perimeter of the base, and the number of guide tubes corresponds to the number of steel bars arranged around the perimeter of the central tube. The lower part of the steel bars arranged around the perimeter of the central tube can be inserted into the guide tubes around the base. Several anchor cables are inserted into the inner cavity of the central tube. The sleeve is fitted over the upper part of the central tube and the top of the steel bars arranged around the perimeter of the central tube.

[0008] The top of the central tube is equipped with a top cover with several installation ports. Several anchor cables are inserted into the inner cavity of the central tube through the installation ports and all the way to the bottom of the central tube. Each anchor cable is made of prestressed steel strand and each anchor cable is equipped with anchors at the top and bottom.

[0009] A positioning ring is fitted at the junction of the bottom of the sleeve and the top of the reinforcing bars surrounding the central tube.

[0010] The central pipe is surrounded by several steel bars, which are evenly fitted with several support hoops from top to bottom.

[0011] The base is equipped with a positioning pile at the center of the bottom. The base has a flared structure and the guide tube around the base is an arc-shaped structure that matches the outer side of the base. The arc-shaped guide tube can ensure that the several steel bars around the center tube can be smoothly inserted into the space after the hole is enlarged.

[0012] The working principle of this utility model:

[0013] The enlarged head anchoring device provided by this utility model involves first drilling an initial hole with the same diameter as the lower end of the base, and then enlarging the lower part of the hole. The enlarged space provides a foundation for the subsequent installation of the anchoring device. A steel pipe with a diameter equal to or slightly smaller than the casing is used to apply pressure to the top of the casing and the tops of several reinforcing bars around the central pipe. This causes the reinforcing bars around the central pipe to insert into several matching arc-shaped guide pipes around the base, forming a diverging reinforcing bar skeleton. Grouting then effectively forms the anchoring force. The anchor cable passes through the installation port of the central pipe top cover and is inserted into the inner cavity of the central pipe. Anchors are installed at the upper and lower ends of the anchor cable, with the upper anchor fitting into the top cover. During construction, tension is applied to the upper part of the anchor cable, causing the lower anchor to engage with the installation port of the top cover, thus fixing the anchor cable within the anchoring device. The anchor cable is made of prestressed steel strand, which has high strength and can withstand significant tensile forces. After the anchor cables are installed and fixed, tensioning and debugging are carried out using jacks, and prestress is applied in stages according to design requirements. The application of prestress puts the anchor cables in a tensile state. When the superstructure tends to displace or is subjected to load, the tension of the anchor cables is transmitted to the anchoring device through the anchorage, and then the anchoring device transmits the load to the deep, solid strata, thereby restraining the soil and preventing soil deformation or sliding, thus achieving the anchoring and stabilizing effect on the superstructure.

[0014] The beneficial effects of this utility model are:

[0015] The enlarged-head anchoring device provided by this utility model has a clearer load-bearing mechanism: compared with traditional anchoring devices that utilize side friction to achieve anchoring, the anchoring device provided by this utility model utilizes the end resistance of the enlarged head, resulting in strong load-bearing capacity and a clear load-bearing mechanism, effectively transferring the load to strata with stronger load-bearing capacity. This utility model saves materials; by connecting the anchoring head with an anchor cable, it is suitable for drilling at various depths, further improving construction efficiency and reducing construction costs and labor input. This utility model allows for flexible adjustment of design parameters; the design parameters of the anchoring device provided by this utility model, such as anchor cable length, number and arrangement of reinforcing bars, can be flexibly adjusted according to the specific requirements and stress conditions of the project. This flexibility allows this utility model to meet the anchoring needs of projects of different scales, structural forms, and load-bearing requirements, providing greater autonomy and adaptability in engineering design and construction, better coordinating with the overall engineering design, achieving optimized design and construction, and improving the overall benefits of the project. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the enlarged head anchoring device described in this utility model.

[0017] Figure 2 This is a schematic diagram of the reinforcement arrangement around the central tube described in this utility model.

[0018] Figure 3 This is a schematic diagram of the anchor cable structure described in this utility model.

[0019] The annotations in the image above are as follows:

[0020] 1. Central tube 2. Base 3. Sleeve 4. Reinforcing bar 5. Guide tube 6. Anchor cable

[0021] 7. Top cover; 8. Anchor; 9. Positioning ring; 10. Support hoop; 11. Positioning pile. Detailed Implementation

[0022] Please see Figures 1 to 3 As shown:

[0023] The enlarged head anchoring device provided by this utility model includes a central tube 1, a base 2, and a sleeve 3. The base 2 is assembled at the bottom of the central tube 1, and the diameter of the bottom of the base 2 is larger than the diameter of the central tube 1. Several steel bars 4 are arranged around the perimeter of the central tube 1. Several guide tubes 5 are arranged around the perimeter of the base 2. The number of guide tubes 5 corresponds to the number of steel bars 4 arranged around the perimeter of the central tube 1. The lower part of the steel bars 4 arranged around the perimeter of the central tube 1 can be inserted into the guide tubes 5 around the perimeter of the base 2. Several anchor cables 6 are inserted into the inner cavity of the central tube 1. The sleeve 3 is sleeved on the upper part of the central tube 1 and the top of the steel bars 4 arranged around the perimeter of the central tube 1.

[0024] The top of the central tube 1 is provided with a top cover 7, and several installation ports are provided on the top cover 7. Several anchor cables 6 are inserted into the inner cavity of the central tube 1 through the installation ports and are inserted all the way to the bottom of the central tube 1. Each anchor cable 6 is made of prestressed steel strand, and each anchor cable 6 is equipped with an anchor 8 at the top and bottom.

[0025] A positioning ring 9 is fitted at the joint between the bottom of the sleeve 3 and the top of the reinforcing bar 4 surrounding the central tube 1.

[0026] The central tube 1 is surrounded by several steel bars 4, which are evenly fitted with several support hoops 10 from top to bottom.

[0027] The base 2 is equipped with a positioning pile 11 at the center of its bottom. The base 2 has a flared structure. The guide tube 5 surrounding the base 2 is an arc-shaped structure that matches the outer side of the base 2. The arc-shaped guide tube 5 can ensure that the several steel bars 4 around the central tube 1 can be smoothly inserted into the space after the hole is enlarged.

[0028] The working principle of this utility model:

[0029] The enlarged head anchoring device provided by this utility model, during installation, first drills an initial hole with the same diameter as the lower end of the base 2, and then enlarges the lower part of the drilled hole. The space after enlargement provides a foundation for the subsequent installation of the anchoring device. A steel pipe with a diameter equal to or slightly smaller than that of the sleeve 3 is used to apply pressure to the top of the sleeve 3 and the tops of several reinforcing bars 4 around the central tube 1. This causes the reinforcing bars 4 arranged around the central tube 1 to insert into several matching arc-shaped guide pipes 5 around the base 2, forming a diverging reinforcing bar skeleton. After grouting, the anchoring force is effectively formed. The anchor cable 6 passes through the installation port of the top cover 7 of the central tube 1 and is inserted into the inner cavity of the central tube 1. Anchors 8 are installed at the upper and lower ends of the anchor cable 6, with the upper anchor 8 engaging with the top cover 7. During construction, by applying tension to the upper part of the anchor cable 6, the lower anchor 8 is locked into the installation port of the top cover 7, thus fixing the anchor cable 6 within the anchoring device. Anchor cable 6 is made of prestressed steel strand, which has high strength and can withstand large tensile forces. After anchor cable 6 is installed and fixed, it is tensioned and adjusted using jacks, and prestress is applied in stages according to design requirements. The application of prestress puts anchor cable 6 in a tensile state. When the superstructure tends to displace or is subjected to load, the tension of anchor cable 6 is transferred to the anchoring device through anchor 8, and then the anchoring device transfers the load to the deep, solid strata, thereby restraining the soil and preventing soil deformation or sliding, achieving the anchoring and stabilizing effect on the superstructure.

Claims

1. An enlarged head anchoring device, characterized in that: It includes a central tube, a base, and a sleeve. The base is assembled at the bottom of the central tube, and the diameter of the bottom of the base is larger than the diameter of the central tube. Several steel bars are arranged around the perimeter of the central tube. Several guide tubes are arranged around the perimeter of the base, and the number of guide tubes corresponds to the number of steel bars arranged around the perimeter of the central tube. The lower part of the steel bars arranged around the perimeter of the central tube can be inserted into the guide tubes around the perimeter of the base. Several anchor cables are inserted into the inner cavity of the central tube. The sleeve is fitted on the upper part of the central tube and the top of the steel bars arranged around the perimeter of the central tube.

2. The enlarged head anchoring device according to claim 1, characterized in that: The top of the central tube is provided with a top cover, and several installation ports are opened on the top cover. Several anchor cables are inserted into the inner cavity of the central tube through the installation ports and are inserted all the way to the bottom of the central tube. Each anchor cable is made of prestressed steel strand, and each anchor cable is equipped with anchors at the top and bottom.

3. The enlarged head anchoring device according to claim 1, characterized in that: A positioning ring is fitted at the junction of the bottom of the sleeve and the top of the reinforcing bar surrounding the central tube.

4. The enlarged head anchoring device according to claim 1, characterized in that: The central tube is surrounded by several steel bars, which are evenly fitted with several support hoops from top to bottom.

5. The enlarged head anchoring device according to claim 1, characterized in that: The base is equipped with a positioning pile at the center of its bottom. The base has a flared structure, and the guide tube surrounding the base has an arc-shaped structure that matches the outer side of the base. The arc-shaped guide tube can ensure that the several steel bars around the center tube can be smoothly inserted into the enlarged space.

Images