Prestress anti-floating anchor rod structure

Abstract

The utility model relates to a prestress anti-floating anchor rod structure, and belongs to the technical field of constructional engineering. Comprising an anchor rod, a positioning clamp, a lock catch and a base plate, the positioning clamp is installed on the top face of the base plate, the base plate is arranged on the end face of a stable stratum, the anchor rod penetrates through the positioning clamp and the base plate and extends into a drill hole of the stable stratum, and the positioning clamp comprises a fixing ring, a plurality of positioning rods and a rotating ring; the positioning rods are slidably connected to the top face of the rotating ring in a circular array mode, the rotating ring rotates to drive the top ends of the positioning rods to abut against the side wall of the anchor rod, the lock catches are installed on the side walls of the positioning rods, and the lock catches abut against the two side walls of the rotating ring to limit the positions of the positioning rods. The anchor rod is positioned through the positioning rod in the anchoring process, and the problem that in the existing anchoring process of the anchor rod, positioning deviation is prone to occurring is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and in particular relates to a prestressed anti-floating anchor rod structure. Background Art

[0002] Anti-floating anchor rods are a type of anti-floating measure for underground structures in construction projects. They are structural components that are set up to resist the upward displacement of the upper structural bottom plate. They are related to the height and changes of the groundwater level and are in the opposite direction of the force applied to the compression piles.

[0003] At present, most anchor rods are set up with the lower end of the anchor rod extending into the stable stratum, and the upper part passing through the structural bottom plate through the embedded casing, etc. After the construction of the structural bottom plate is completed, the anchor rod is anchored to achieve the purpose of anti-floating.

[0004] During the anchoring process, it is necessary to determine the position of the anchor in the anchor hole to ensure that there is an equal thickness of anchoring slurry around the anchor and the thickness of the protective layer is not less than 20mm, so as to ensure the anti-floating ability of the anchor. However, in actual use, there are problems such as shaking of the anchor steel bars or deviations in positioning. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a prestressed anti-floating anchor rod structure, which solves the problem of positioning deviation that is easy to occur in the process of anchoring the anchor rod.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a prestressed anti-floating anchor rod structure, including an anchor rod, a positioning clamp, a locking buckle and a pad, the positioning clamp is installed on the top surface of the pad, the pad is arranged on the end surface of the stable formation, the anchor rod passes through the positioning clamp and the pad and extends into the drilled hole of the stable formation, the positioning clamp includes a fixed ring, a plurality of positioning rods and a rotating ring, the fixed ring is installed on the top surface of the pad, the rotating ring is rotatably connected to the top of the fixed ring, a plurality of the positioning rods are slidably connected to the top surface of the rotating ring in a circular array, the rotating ring rotates to drive the top ends of the plurality of positioning rods to abut against the side walls of the anchor rod, the locking buckle is installed on the side walls of the positioning rod, and the locking buckle abuts against the two side walls of the rotating ring to limit the position of the positioning rod.

[0007] As a preferred technical solution of the utility model, the lock buckle includes a lock shell, a push rod and two limit rods, the same end of the two limit rods is hinged to the bottom end of the push rod, the other ends of the two limit rods are respectively located outside the two side walls of the lock shell, the push rod is slidably arranged in the lock shell, and the push rod is used to drive the two limit rods to rotate and abut against the side wall of the rotating ring under the restriction of the side wall of the lock shell.

[0008] As a preferred technical solution of the utility model, a spiral groove is provided on the top surface of the rotating ring, and thread teeth are provided on the bottom surface of the positioning rod, and the thread teeth are spirally connected to the spiral groove.

[0009] As a preferred technical solution of the utility model, it also includes a waterproof tube, which is sleeved on the outside of the anchor rod and located on the bottom surface of the pad.

[0010] As a preferred technical solution of the utility model, waterproof glue is filled between the waterproof tube and the anchor rod.

[0011] As a preferred technical solution of the utility model, the anchor rod adopts prestressed threaded steel bars.

[0012] As a preferred technical solution of the utility model, the diameter of the anchor rod is in the range of 100-300 mm.

[0013] The beneficial effects of the utility model are:

[0014] 1. By setting a positioning fixture on the top of the anchor rod, the anchor rod is positioned by the positioning rod during the anchoring process, ensuring that the position of the anchor rod will not deviate due to shaking during the fixing process, reducing the occurrence of inconsistent thickness of the protective layer around the anchor rod when the anchoring slurry is filled into the anchor hole to form a protective layer, improving the anti-floating ability of the anchor rod, and solving the problem of positioning deviation that is easy to occur during the anchoring process of the existing anchor rod;

[0015] 2. A waterproof tube is installed under the pad and filled with waterproof glue to effectively prevent the external environment from corroding the anchor rod and increase the life of the anchor rod device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the positioning fixture structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the positioning rod structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the lock buckle of the utility model being located on the positioning rod;

[0021] Figure 5 This is a schematic diagram of the lock structure of the utility model;

[0022] Main component symbols

[0023] In the figure: 1. anchor rod; 2. positioning fixture; 21. fixing ring; 22. positioning rod; 221. threaded teeth; 23. rotating ring; 231. spiral groove; 3. pad; 4. waterproof tube; 5. lock buckle; 51. lock shell; 52. push rod; 53. limit rod. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] See also Figure 1-Figure 5 The present embodiment provides a prestressed anti-floating anchor structure, including an anchor 1, a positioning fixture 2, a lock buckle 5 and a pad 3. The positioning fixture 2 is installed on the top surface of the pad 3, and the pad 3 is arranged on the end surface of the stable formation. The anchor 1 passes through the positioning fixture 2 and the pad 3 and extends into the borehole of the stable formation. The positioning fixture 2 includes a fixed ring 21, a plurality of positioning rods 22 and a rotating ring 23. The fixed ring 21 is installed on the top surface of the pad 3, and the rotating ring 23 is rotatably connected to the top of the fixed ring 21. A plurality of positioning rods 22 are slidably connected to the top surface of the rotating ring 23 in a circular array. The rotating ring 23 rotates to drive the top ends of the plurality of positioning rods 22 to abut against the side walls of the anchor 1. The lock buckle 5 is installed on the side walls of the positioning rod. The lock buckle 5 abuts against the two side walls of the rotating ring to limit the position of the positioning rod 22. When installing the anchor 1, first respectively The pad 3 and the positioning fixture 2 are installed on the stable stratum, and the through holes on the pad 3 and the positioning fixture 2 are made to correspond to the anchor holes on the stable stratum. Then, when the anchor rod 1 is placed, the bottom end of the anchor rod 1 is passed through the through holes on the positioning fixture 2 and the pad 3 and enters the anchor hole. When the anchor rod 1 is placed in place, the rotating ring 23 is rotated to allow several positioning rods 22 to shrink inward synchronously until they abut against the side wall of the anchor rod 1. Then, the position of the positioning rod 22 is limited by the lock 5, thereby preventing the vibration generated during the installation of the anchor rod 1 from causing the position of the positioning rod 22 to change. The lock 5 is used to abut against the side wall of the rotating ring 23 so that the position of the positioning rod 22 can be kept stationary, thereby preventing the position of the positioning rod 22 from being offset during the installation of the anchor rod 1. In this way, the positioning rod 22 is used to ensure that the axis of the anchor rod 1 coincides with the axis of the positioning ring, and then the axis of the positioning ring coincides with the axis of the anchor hole, and then cement slurry is poured around the anchor rod 1 to complete the anchoring of the anchor rod 1, avoiding the problem that the anchor rod 1 is too long and the diameters of the anchor hole and the anchor rod 1 are small, which may easily lead to deviation of the anchor rod 1 during installation, resulting in the inability to maintain a consistent thickness around the anchor rod 1 when pouring cement slurry, which weakens the anti-floating effect of the anchor rod after anchoring is completed. The position of the anchor rod 1 is determined by the positioning rod 22, which improves the positioning accuracy of the anchor rod 1 and the anti-floating force of the anchor rod 1 after it is stabilized.

[0026] The lock buckle 5 comprises a lock shell 51, a push rod 52 and two limit rods 53. The same end of the two limit rods 53 is hinged to the bottom end of the push rod 52, and the other ends of the two limit rods 53 are respectively located outside the two side walls of the lock shell 51. The push rod 52 is slidably arranged in the lock shell 51. When it is necessary to limit the position of the positioning rod 22, the push rod 52 is pressed, and the push rod 52 slides and drives the two limit rods 53 to rotate under the restriction of the two side walls of the lock shell 51, so that the two limit rods 53 abut against the side walls of the rotating ring 23, thereby limiting the position of the positioning rod 22. At this time, if it is necessary to adjust the position of the positioning rod 22, the push rod 52 can be pulled outward to make the limit rod 53 fall off and abut against the rotating ring 23, so that the position of the positioning rod 22 can be adjusted.

[0027] In order to allow the positioning rod 22 to slide inward synchronously during the rotation of the rotating ring 23 to abut the anchor rod 1, and at the same time allow the axis of the anchor rod 1 to coincide with the axis of the positioning ring, in this embodiment, a spiral groove 231 is provided on the top surface of the rotating ring 23, and a threaded tooth 221 is provided on the bottom surface of the positioning rod 22. The threaded tooth 221 is spirally connected to the spiral groove 231. When it is necessary to fix and position the anchor rod 1, the rotating ring 23 is rotated to allow the threaded tooth 221 on the positioning rod 22 to move inward under the drive of the spiral groove 231. By arranging multiple positioning rods 22 in different directions on the rotating ring 23, and the ends of the positioning rods 22 all point to the center of the rotating ring 23, when the rotating ring 23 rotates along the set direction, it can drive multiple positioning rods 22 to slide inward at the same time to complete the abutment against the anchor rod 1, thereby ensuring the position of the anchor rod 1.

[0028] In order to improve the strength and structural stability of the anchor rod 1, and enhance the bearing capacity and safety, in one embodiment, a waterproof tube 4 is also included, which is sleeved on the outside of the anchor rod 1 and located on the bottom surface of the pad 3. Since the anchor rod 1 passes through the waterproof layer, and after the anchor rod 1 is anchored, the anchor rod 1 will contact the groundwater, and the moisture can cause corrosion of the metal parts inside the anchor rod 1. Especially in a humid or high humidity environment, the corrosion will weaken the strength and structural stability of the anchor rod 1, and reduce its bearing capacity and safety. Therefore, by arranging the waterproof tube 4 on the outside of the anchor rod 1, the accumulation and penetration of moisture inside the anchor rod 1 can be reduced, thereby reducing the damage of the anchor rod 1 and the surrounding structure caused by water. This helps to maintain the stability and structural integrity of the anchor rod 1 and improve the service life and overall performance of the anchor rod 1.

[0029] In order to better improve the waterproof performance of the waterproof tube 4, in one embodiment, waterproof glue is filled between the waterproof tube 4 and the anchor rod 1. The waterproof glue can be waterproof rubber. The waterproof rubber material usually has good corrosion resistance and can resist the erosion of chemicals, acids, alkalis, salt water, etc. to the material. This allows the waterproof rubber to maintain its waterproof performance and service life in various environments; or a waterproof polyurethane sealant is used. The waterproof polyurethane sealant has a high bonding strength and can be firmly bonded to the surfaces of various different materials, such as concrete, metal, masonry, ceramics, etc. It can fill and seal tiny cracks and pores, provide a reliable waterproof effect, and maintain its performance stability under different temperature and humidity conditions. It has a certain degree of elasticity, can adapt to the deformation and expansion of the structure, and is not easy to crack or peel off. By filling the waterproof glue between the waterproof tube 4 and the anchor rod 1, the waterproof performance of the waterproof tube 4 can be effectively improved, thereby better protecting the anchor rod 1.

[0030] In order to ensure the anti-floating ability of the anchor rod 1 after the stabilization is completed, in one embodiment, the anchor rod 1 adopts prestressed threaded steel bars. The prestressed threaded steel bars generate prestress by applying a pre-applied tensile force, so that the anchor rod 1 is kept in a tense state, providing better tensile performance and structural stability. At the same time, the prestressed threaded steel bars usually have good corrosion resistance and durability, can resist the erosion of the external environment, and maintain their prestressed performance and service life.

[0031] In order to facilitate the installation of the anchor rod 1, in one embodiment, the diameter of the anchor rod 1 is in the range of 100-300 mm. When installing the anchor rod 1, it is necessary to drill a hole first. When the diameter of the anchor rod 1 is in the range of 100-300 mm, a drilling rig can be used for construction. The equipment is light, the construction is convenient, and the cost is low. The specific diameter of the anchor rod 1 is determined according to factors such as the load requirements of the structure, soil conditions, construction feasibility, and economy.

[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A prestressed anti-floating anchor structure, characterized in that: It includes an anchor rod, a positioning fixture, a locking buckle and a pad, the positioning fixture is installed on the top surface of the pad, the pad is arranged on the end surface of the stable formation, the anchor rod passes through the positioning fixture and the pad and extends into the drill hole of the stable formation, the positioning fixture includes a fixed ring, a plurality of positioning rods and a rotating ring, the fixed ring is installed on the top surface of the pad, the rotating ring is rotatably connected to the top of the fixed ring, a plurality of positioning rods are slidably connected to the top surface of the rotating ring in a circular array, the rotating ring rotates to drive the top ends of the plurality of positioning rods to abut against the side walls of the anchor rod, the locking buckle is installed on the side walls of the positioning rod, and the locking buckle abuts against the two side walls of the rotating ring to limit the position of the positioning rod.

2. A prestressed anti-floating anchor structure according to claim 1, characterized in that: The lock buckle includes a lock shell, a push rod and two limit rods. The same end of the two limit rods is hinged to the bottom end of the push rod, and the other ends of the two limit rods are respectively located outside the two side walls of the lock shell. The push rod is slidably arranged in the lock shell, and the push rod is used to drive the two limit rods to rotate and abut against the side wall of the rotating ring under the restriction of the side wall of the lock shell.

3. The prestressed anti-floating anchor structure according to claim 1, characterized in that: The top surface of the rotating ring is provided with a spiral groove, and the bottom surface of the positioning rod is provided with thread teeth, and the thread teeth are spirally connected to the spiral groove.

4. The prestressed anti-floating anchor structure according to claim 1, characterized in that: It also includes a waterproof tube, which is sleeved on the outside of the anchor rod and located on the bottom surface of the pad.

5. The prestressed anti-floating anchor structure according to claim 4, characterized in that: The space between the waterproof tube and the anchor rod is filled with waterproof glue.

6. The prestressed anti-floating anchor structure according to claim 1, characterized in that: The anchor rod is made of prestressed threaded steel bar.

7. The prestressed anti-floating anchor structure according to claim 1, characterized in that: The diameter of the anchor rod is in the range of 100-300 mm.

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