A pre-buried fixing structure of a cast-in-place pipe gallery bottom plate anti-floating anchor rod

Abstract

The utility model relates to the technical field of building construction, and disclose a cast -in -place pipe gallery bottom plate anti -floating anchor rod's pre -buried fixed structure. This cast -in -place pipe gallery bottom plate anti -floating anchor rod's pre -buried fixed structure, including pre -buried pipe, the top fixed connection of pre -buried pipe has the cone head socket tube that adapts to anchor rod reinforcement, the top of cone head socket tube is established to have the contraction gap that is annular array distribution and extends downward, the outside of cone head socket tube is connected with the cone head nut that adapts to anchor rod reinforcement and adapts to its upper end with screw thread, the inside of pre -buried pipe is established to have the receiving hole that is vertical equidistance distribution and extends to its left and right side, the device has the advantages such as the mechanical bite force of reinforcing anchor rod and concrete, the installation operation of convenient and reliable locking mechanism, solveed the problem that the conventional anchor rod only relies on the cohesive force between steel bar and grouting body to resist the pullout force, and under the long -term groundwater buoyancy effect, prone to slippage phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a pre-embedded fixing structure for anti-buoyancy anchor rods on the bottom slab of a cast-in-place pipe gallery. Background Technology

[0002] In the construction of cast-in-place pipe gallery base slabs, anti-buoyancy anchors are key components that prevent underground structures from floating due to the buoyancy of groundwater, and their anchoring performance is directly related to the stability of the overall structure.

[0003] Conventional anchor bolts rely solely on the bond between the reinforcing steel and the grout to resist pull-out forces. Under the long-term buoyancy of groundwater, they are prone to slippage. Therefore, a pre-embedded fixing structure for anti-buoyancy anchor bolts in cast-in-place pipe gallery base slabs is proposed to solve the above problems. Utility Model Content

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a pre-embedded fixing structure for anti-buoyancy anchor rods in cast-in-place pipe gallery base slabs. It has advantages such as enhancing the mechanical interlocking force between the anchor rod reinforcement and concrete, convenient installation operation, and a reliable locking mechanism. It solves the problem that conventional anchor rods rely solely on the bonding force between the reinforcement and the grout to resist upward pull-out force, which easily leads to slippage under the long-term buoyancy of groundwater.

[0005] (II) Technical Solution The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pre-embedded fixing structure for anti-buoyancy anchor rods of cast-in-place pipe gallery bottom slabs includes a pre-embedded pipe. The top of the pre-embedded pipe is fixedly connected with a conical socket cylinder adapted to the anchor rod reinforcement. The top of the conical socket cylinder has a contraction notch arranged in a ring array and extending downward. The outer side of the conical socket cylinder is threaded with a conical nut adapted to the anchor rod reinforcement and its upper end. The interior of the pre-embedded pipe has vertically equidistantly distributed receiving holes extending to its left and right sides. Each receiving hole is hinged with an L-shaped anchor bar arranged symmetrically on the left and right sides. The pre-embedded pipe has a guide rod that passes through the receiving hole inside. The guide rod has a drive assembly located inside the pre-embedded pipe on its outer side. The guide rod is fixedly connected to drive columns that are vertically and evenly distributed. The drive columns are located above the L-shaped anchor bars. A wedge-shaped groove is opened on the right side of the upper end of the guide rod. A rectangular cavity communicating with the upper right side of the pre-embedded pipe is opened. A wedge-shaped block extending into the wedge-shaped groove is provided inside the rectangular cavity. A columnar tube is fixedly connected to the top of the pre-embedded pipe. A locking core assembly extending into the pre-embedded pipe and abutting against the right side of the wedge-shaped block is provided inside the columnar tube.

[0006] The beneficial effects of this utility model are: The pre-embedded fixing structure for the anti-buoyancy anchor bolts in the cast-in-place pipe gallery base slab involves placing a conical nut on the outside of the anchor bolt reinforcement, then inserting the anchor bolt reinforcement into the conical socket, and tightening the conical nut. This causes the conical socket to contract, resulting in a tight fit between the inner wall of the upper end of the conical socket and the outer side of the anchor bolt reinforcement, clamping the anchor bolt reinforcement. This allows the device to be quickly fixed to the lower end of the anchor bolt reinforcement. The anchor bolt reinforcement and the device are then inserted into the drilled hole. Pulling out the locking assembly releases the wedge block's restriction, and the force generated by the restoring deformation of the drive assembly pushes the guide rod downwards inside the pre-embedded pipe, thereby driving the wedge groove... As the guide rod moves downward, the wedge-shaped groove forces the wedge block to separate from the guide rod. Simultaneously, the guide rod drives the drive column downward, which in turn forces the L-shaped anchor bar to rotate 90° around the hinge point to the opposite side and extend out of the receiving hole. At this point, the guide rod stops moving downward, and the drive column automatically forms a support structure after the L-shaped anchor bar unfolds. Finally, grouting is performed on the drilled hole. The L-shaped anchor bar greatly enhances the mechanical interlocking force and anchoring capacity between the anchor bar and the surrounding concrete, preventing the anchor bar from being pulled out of the concrete when subjected to huge upward pull-out forces. It has the advantages of enhancing the mechanical interlocking force between the anchor bar and the concrete and convenient installation operation.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the locking core assembly includes a limiting post and a steel wire rope. The interior of the cylindrical tube is provided with a limiting post that extends into the pre-embedded pipe and abuts against the right side of the wedge block. The top of the limiting post is fixedly connected to a steel wire rope.

[0009] The beneficial effect of adopting the above-mentioned further solution is that when the anchor rod and the device are placed into the borehole, one end of the wire rope enters the borehole along with the device, while the other end of the wire rope is outside the borehole. When the device is lowered to the bottom of the borehole, the wire rope is pulled, thereby pulling the limiting column out from the top of the columnar cylinder, which releases the limiting column from the wedge block.

[0010] Furthermore, the drive assembly includes a partition and a spring. The outer side of the guide rod is fixedly connected to the partition located inside the pre-embedded pipe, and the outer side of the guide rod is fitted with a spring located inside the pre-embedded pipe and at the top of the partition.

[0011] The beneficial effect of adopting the above-mentioned further solution is that when the limiting post is released from the wedge block, the spring then recovers its deformation, and the resulting thrust pushes the guide rod downward inside the pre-embedded pipe through the partition, which in turn drives the wedge groove to move downward. The wedge groove forces the wedge block to separate from the guide rod, and the guide rod simultaneously drives the drive column to move downward. The drive column then forces the L-shaped anchor bar to rotate 90° around the hinge point to the opposite side and extend out of the receiving hole. At this time, the guide rod stops moving downward, and the drive column automatically forms a support structure after the L-shaped anchor bar unfolds.

[0012] Furthermore, a safety pin is inserted through the limiting post and extends to the rear side of the cylindrical tube.

[0013] The advantage of adopting the above-mentioned further solution is that the safety pin provides additional safety protection, preventing the limit post from falling out during transportation.

[0014] Furthermore, the bottom of the pre-embedded pipe is spherical.

[0015] The advantage of adopting the above-mentioned further solution is that the bottom of the pre-embedded pipe is shaped like a ball, which makes it easier to lower it into the borehole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the pre-embedded pipe structure of this utility model; Figure 3 This is an enlarged schematic diagram of the structure at point a of this utility model; Figure 4 This is an enlarged schematic diagram of the structure at point b of this utility model; Figure 5 This is a top sectional view of the embedded pipe of this utility model; Figure 6 This is a schematic diagram of the unfolded structure of the L-shaped anchor bar of this utility model; Figure 7 This is a partial sectional view of the L-shaped anchor bar pre-embedded pipe structure of this utility model.

[0017] In the diagram: 1. Embedded pipe; 2. Conical socket cylinder; 3. Shrinkage notch; 4. Conical nut; 5. Reception hole; 6. L-shaped anchor bar; 7. Guide rod; 8. Drive assembly; 801. Partition plate; 802. Spring; 9. Drive column; 10. Wedge groove; 11. Rectangular cavity; 12. Wedge block; 13. Columnar cylinder; 14. Locking core assembly; 141. Limiting column; 142. Steel wire rope; 15. Safety pin. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the embodiments, by Figure 1-7This invention discloses a pre-embedded fixing structure for anti-buoyancy anchor bolts in the bottom slab of a cast-in-place pipe gallery. The structure includes an embedded pipe 1, with a conical socket 2, adapted to the anchor bolt reinforcement, fixedly connected to the top of the embedded pipe 1. The top of the conical socket 2 has constriction notches 3 arranged in a circular array and extending downwards. A conical nut 4, adapted to the anchor bolt reinforcement and its upper end, is threadedly connected to the outer side of the conical socket 2. The interior of the embedded pipe 1 has vertically equidistantly distributed receiving holes 5 extending to its left and right sides. Each receiving hole 5 has L-shaped anchor bars 6 hinged symmetrically distributed on the left and right sides. The embedded pipe 1 also has through receiving holes. The guide rod 7 of the 5 has a drive assembly 8 located inside the pre-embedded pipe 1 on its outer side. The guide rod 7 is fixedly connected to drive columns 9 that are vertically and equally distributed. The drive columns 9 are located above the L-shaped anchor bars 6. A wedge-shaped groove 10 is opened on the right side of the upper end of the guide rod 7. A rectangular cavity 11 communicating with the inside of the pre-embedded pipe 1 is opened on the right side of the upper end of the pre-embedded pipe 1. A wedge-shaped block 12 extending into the wedge-shaped groove 10 is provided inside the rectangular cavity 11. A columnar tube 13 is fixedly connected to the top of the pre-embedded pipe 1. A locking core assembly 14 extending into the pre-embedded pipe 1 and abutting against the right side of the wedge-shaped block 12 is provided inside the columnar tube 13. The locking core assembly 14 includes a limiting post 141 and a steel wire rope 142. The cylindrical tube 13 has a limiting post 141 that extends into the pre-embedded pipe 1 and abuts against the right side of the wedge block 12. The top of the limiting post 141 is fixedly connected to the steel wire rope 142. The anchor rod and the device are placed into the borehole. One end of the wire rope 142 enters the borehole along with the device, while the other end of the wire rope 142 is outside the borehole. When the device is lowered to the bottom of the borehole, the wire rope 142 is pulled, which in turn pulls the limiting post 141 out from the top of the columnar cylinder 13, thereby releasing the limiting post 141 from the wedge block 12. The drive assembly 8 includes a partition plate 801 and a spring 802. The outer side of the guide rod 7 is fixedly connected to the partition plate 801 located inside the pre-embedded pipe 1, and the outer side of the guide rod 7 is sleeved with a spring 802 located inside the pre-embedded pipe 1 and at the top of the partition plate 801. When the limiting post 141 releases the limiting position on the wedge block 12, the spring 802 then restores its deformation, and the resulting thrust pushes the guide rod 7 downward inside the pre-embedded pipe 1 through the partition 801, which in turn drives the wedge groove 10 downward. The wedge groove 10 forces the wedge block 12 to separate from the guide rod 7. At the same time, the guide rod 7 drives the drive post 9 to move downward. The drive post 9 then forces the L-shaped anchor bar 6 to rotate 90° around the hinge point to the opposite side and extend out of the receiving hole. At this time, the guide rod 7 stops moving downward, and the drive post 9 automatically forms a support structure after the L-shaped anchor bar 6 unfolds. A safety pin 15 is inserted into the front side of the cylindrical tube 13, which penetrates the limiting post 141 and extends to its rear side; The safety pin 15 provides additional safety to prevent the limit post 141 from falling out during transportation; The bottom of the pre-embedded pipe 1 is spherical; The bottom of the pre-embedded pipe 1 is shaped like a ball to facilitate its placement in the borehole.

[0020] Working principle: Step 1: Place the conical nut 4 on the outside of the anchor rod, then insert the anchor rod into the inside of the conical socket 2, and tighten the conical nut 4. This causes the conical socket 2 to contract at the notch 3, thereby making the inner wall of the upper end of the conical socket 2 fit tightly against the outside of the anchor rod, clamping the anchor rod. This allows the device to be quickly fixed to the lower end of the anchor rod. Step 2: Place the anchor rod and the device into the borehole. One end of the wire rope 142 enters the borehole along with the device, while the other end of the wire rope 142 is outside the borehole. When the device is lowered to the bottom of the borehole, pull the wire rope 142, and then pull the limiting post 141 out from the top of the columnar cylinder 13, thereby releasing the limiting post 141 from the wedge block 12. Step 3: After the limiting post 141 releases the limit on the wedge block 12, the spring 802 then recovers its deformation, and the resulting thrust pushes the guide rod 7 downward inside the pre-embedded pipe 1 through the partition 801, which in turn drives the wedge groove 10 downward. The wedge groove 10 forces the wedge block 12 to separate from the guide rod 7. At the same time, the guide rod 7 drives the drive post 9 to move downward. The drive post 9 then forces the L-shaped anchor bar 6 to rotate 90° around the hinge point to the opposite side and extend out of the receiving hole. At this time, the guide rod 7 stops moving downward. After the L-shaped anchor bar 6 unfolds, the drive post 9 automatically forms a support structure. Finally, the borehole is grouted. The L-shaped anchor bar 6 greatly enhances the mechanical interlocking force and anchoring capacity between the anchor bar and the surrounding concrete, preventing the anchor bar from being pulled out of the concrete when subjected to huge upward pull-out force.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-buried fixing structure of a cast-in-place pipe gallery bottom plate anti-floating anchor rod, comprising a pre-buried pipe (1), characterized in that: The top of the pre-embedded pipe (1) is fixedly connected to a conical socket (2) adapted to the anchor rod reinforcement. The top of the conical socket (2) has a constriction notch (3) arranged in a ring array and extending downward. The outer side of the conical socket (2) is threaded with a conical nut (4) adapted to the anchor rod reinforcement and its upper end. The interior of the pre-embedded pipe (1) has vertically equidistant storage holes (5) extending to its left and right sides. The interior of each storage hole (5) is hinged with L-shaped anchor bars (6) arranged symmetrically on the left and right sides. The interior of the pre-embedded pipe (1) is provided with a guide rod (7) penetrating the storage hole (5). The outer side of the guide rod (7) is provided with a location located on the pre-embedded pipe (1). The drive assembly (8) inside the guide rod (7) is fixedly connected to the outside of the guide rod (7) and the drive columns (9) are distributed vertically at equal intervals. The drive columns (9) are located above the L-shaped anchor bar (6). A wedge groove (10) is opened on the right side of the upper end of the guide rod (7). A rectangular cavity (11) communicating with the inside is opened on the right side of the upper end of the pre-embedded pipe (1). A wedge block (12) extending into the wedge groove (10) is provided inside the rectangular cavity (11). A columnar tube (13) is fixedly connected to the top of the pre-embedded pipe (1). A locking core assembly (14) extending into the pre-embedded pipe (1) and abutting the right side of the wedge block (12) is provided inside the columnar tube (13).

2. The pre-buried fixing structure of the anti-floating anchor rod of the cast-in-place pipe gallery bottom plate according to claim 1, characterized in that: The drive assembly (8) includes a partition (801) and a spring (802). The outer side of the guide rod (7) is fixedly connected to the partition (801) located inside the pre-embedded pipe (1). The outer side of the guide rod (7) is fitted with a spring (802) located inside the pre-embedded pipe (1) and at the top of the partition (801).

3. The pre-embedded fixing structure for anti-buoyancy anchor rods in the bottom slab of a cast-in-place pipe gallery according to claim 1, characterized in that: The locking core assembly (14) includes a limiting post (141) and a steel wire rope (142). The cylindrical tube (13) has a limiting post (141) that extends into the pre-embedded pipe (1) and abuts against the right side of the wedge block (12). The top of the limiting post (141) is fixedly connected to the steel wire rope (142).

4. The pre-embedded fixing structure for anti-buoyancy anchor rods in the bottom slab of a cast-in-place pipe gallery according to claim 3, characterized in that: A safety pin (15) is inserted into the front side of the cylindrical tube (13) and extends to the rear side of the tube.

5. The pre-embedded fixing structure for anti-buoyancy anchor rods in the bottom slab of a cast-in-place pipe gallery according to claim 1, characterized in that: The bottom of the pre-embedded pipe (1) is spherical.

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