Fabricated station force transmission key

Abstract

The utility model discloses an assembly type station force transmission key, and relates to the technical field of force transmission keys, the assembly type station force transmission key comprises a bolt sleeve integrally formed with an assembly type block, the bolt sleeve is internally in threaded connection with a force transmission bolt, and one side of the bolt sleeve is provided with a detachable rotating piece in threaded connection with the force transmission bolt. Stable work of the force transmission key is achieved through mutual cooperation of the bolt sleeve, the force transmission bolt and the detachable rotating piece, and the whole force transmission key is simple in structure, small in size, suitable for assembly type station structures of different thicknesses or types, especially suitable for assembly type stations with small fertilizer groove width, simple in installation technology, small in construction period influence and high in practicability. Repeated retightening can be performed according to deformation of the enclosure structure, and the retightening process is simple; and the grouting head is installed to conduct grouting plugging on the force transmission key, and construction and structural defense of the assembly type station can be effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of force transmission key technology, and in particular to a prefabricated station force transmission key. Background Technology

[0002] Compared to traditional cast-in-place underground stations, prefabricated stations require a force transfer key structure to transfer the horizontal load of the enclosure structure to the intermediate slab during structural load transfer after the steel supports are removed. Installing the force transfer key structure within the trench is challenging due to the size of the key structure and the installation process. The trench between the enclosure structure and the station structure is quite wide, typically reaching 50cm, making it unsuitable for stations with narrower lateral widths. Taking the prefabricated station of Shenzhen Metro Phase 5 as an example, the theoretical gap between the enclosure structure and the prefabricated station structure is 15cm. Traditional force transfer key structures with built-in jacks, due to their large size (often exceeding 30cm), cannot be smoothly lowered from the pit top to the designated position for installation. Furthermore, installation requires workers to lower long wrenches from the pit top for tightening, making the operation time-consuming and labor-intensive, and compromising installation accuracy and quality.

[0003] For example, announcement number CN217580315U, published on October 14, 2022, disclosed a dowel bar structure for pre-filling fertilizer trenches using a post-cast strip. This structure includes an underground concrete main structure with a fertilizer trench to be backfilled on its outer side. The underground structure has a post-cast strip separating it. Multiple support structures are installed on the post-cast strip, spaced apart along its length. These support structures are positioned at the location of the building's frame beams within the post-cast strip, with both sides supporting the beams on the post-cast strip cross-sections, effectively transforming the frame beams into dowel bars. However, this disclosed dowel bar structure cannot be easily installed within the narrow area of ​​the fertilizer trench, resulting in poor practicality. Utility Model Content

[0004] The purpose of this invention is to provide a more practical prefabricated station force transmission key. This invention uses a bolt sleeve located within the prefabricated module to provide steel support for the force transmission bolt. The force transmission bolt can be quickly removed through cooperation with the bolt sleeve and a detachable rotating component. The entire force transmission key is convenient and quick to use, facilitating installation in narrow spaces.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a prefabricated station force transmission key, including a bolt sleeve integrally formed with the prefabricated block, wherein a force transmission bolt is internally threaded to the bolt sleeve, and a detachable rotatable component threaded to the force transmission bolt is provided on one side of the bolt sleeve.

[0006] The force-transmitting bolt includes a force-transmitting end, a coarse-threaded rod, and a fine-threaded rod, which are connected in sequence. The coarse-threaded rod is threadedly engaged with the bolt sleeve, and the fine-threaded rod is threadedly connected with a detachable rotating component.

[0007] The bolt sleeve is provided with mounting holes, both ends of which are threaded, and the inner wall of the threads at both ends of the mounting holes is smooth and without threads.

[0008] One end of the detachable rotating component is provided with a threaded hole that mates with a fine threaded rod.

[0009] The thread of the fine thread rod is a self-locking thread.

[0010] The other end of the detachable rotating component is provided with a rotating end.

[0011] Both the force-transmitting end and the rotating end have hexagonal cross-sections.

[0012] The length of the detachable rotating component is greater than the sum of the length of the smooth inner wall of the mounting hole and the width of the groove.

[0013] The outer diameter of the detachable rotating component is smaller than the inner diameter of the mounting hole.

[0014] The force-transmitting bolt is a metal rod, and the bolt sleeve is a PE pipe or a metal pipe. The outer surface of the bolt sleeve is textured.

[0015] The beneficial effects of this utility model are:

[0016] The stable operation of the force transmission key is achieved through the cooperation of bolt sleeves, force transmission bolts, and detachable rotating parts. The entire force transmission key has a simple structure and small size, and can be mass-produced in the factory. It is suitable for prefabricated station structures of different thicknesses or types, and is especially suitable for prefabricated stations with narrow trenches. Its installation process is simple, has little impact on the construction period, and can be repeatedly tightened according to the deformation of the retaining structure. The tightening process is simple. Furthermore, the installation of grouting heads to grout and seal the force transmission key can effectively protect the construction and structural integrity of prefabricated stations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the prefabricated station force transmission key of this utility model.

[0018] Figure 2 This is a flowchart illustrating the construction method for the force transmission key structure of a prefabricated railway station.

[0019] In the attached diagram: 1-bolt sleeve, 101-mounting hole, 2-force transmission bolt, 21-force transmission end, 22-coarse thread rod, 23-fine thread rod, 3-detachable rotating part, 301-threaded hole, 302-rotating end, 4-grouting head, 5-assembled block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] like Figure 1 As shown, the prefabricated station force transmission key includes a bolt sleeve 1 integrally formed with the prefabricated block 5. The bolt sleeve 1 is internally threaded with a force transmission bolt 2. A detachable rotating part 3 is provided on one side of the bolt sleeve 1, which is threadedly connected to the force transmission bolt 2. Before use, the bolt sleeve 1 is threadedly connected to the force transmission bolt 2, and the bolt sleeve 1 and the prefabricated block 5 are prefabricated in the factory.

[0023] In use, the bolt sleeve 1 and the force transmission bolt 2 are threaded together and prefabricated together with the prefabricated block 5. The prefabricated block 5 has a pre-drilled hand hole to facilitate subsequent installation. After the steel support is disassembled after construction is completed, the detachable rotating part 3 is threadedly connected to the force transmission bolt 2 in the bolt sleeve 1. The detachable rotating part 3 is rotated to move the force transmission bolt 2 out of the bolt sleeve 1. The force transmission bolt 2 is in close contact with the retaining structure and serves as the force transmission structure between the retaining structure and the prefabricated block 5. The detachable rotating part 3 is then removed from the bolt sleeve 1 and reused. After the backfilling of the trench between the retaining structure and the prefabricated block 5 is completed, the grouting head 4 is installed on the bolt sleeve 1. Grouting is injected into the bolt sleeve 1 to achieve sealing and water stop of the force transmission key structure. The entire force transmission key has a simple structure and small size, and can be mass-produced in the factory. It is suitable for prefabricated station structures of different thicknesses or types, and is especially suitable for prefabricated stations with small trench widths. Its installation process is simple and has little impact on the construction period.

[0024] It can be repeatedly tightened according to the deformation of the enclosure structure, and the tightening process is simple; and the installation of grouting heads to grout and seal the force transmission keys can effectively ensure the construction and structural protection of prefabricated stations.

[0025] The force-transmitting bolt 2 includes a force-transmitting end 21, a coarse-threaded rod 22, and a fine-threaded rod 23, which are connected in sequence. The coarse-threaded rod 22 is threadedly engaged with the bolt sleeve 1, and the fine-threaded rod 23 is threadedly connected with the detachable rotating part 3. The force-transmitting end 21 is designed to facilitate the rotation of the coarse-threaded rod 22 and the fine-threaded rod 23, thereby facilitating the quick connection of the force-transmitting bolt 2 to the bolt sleeve 1. The outer diameter of the coarse-threaded rod 22 is larger than that of the fine-threaded rod 23, which allows the coarse-threaded rod 22 to be removed from the bolt sleeve 1 after the fine-threaded rod 23 is connected to the detachable rotating part 3.

[0026] The bolt sleeve 1 is provided with a mounting hole 101. The mounting hole 101 is designed to facilitate the installation of the force transmission bolt into the bolt sleeve 1. Both ends of the mounting hole 101 are provided with threads. The thread on one side of the mounting hole 101 is connected to the coarse thread rod 22, thereby realizing the installation of the force transmission bolt 2. The thread on the other side of the mounting hole 101 is used to connect with the grouting head 4, which facilitates subsequent grouting and sealing. Specifically, the outer thread of the grouting head 4 should match the inner thread of the bolt sleeve 2 for tightening when installing the grouting head 4. The middle inner wall of the threads at both ends of the mounting hole 101 is smooth and without threads, thereby facilitating the easy movement of the detachable rotating part 3 into the mounting hole 101 for threaded connection with the fine thread rod 23.

[0027] One end of the detachable rotating part 3 is provided with a threaded hole 301 that mates with the fine threaded rod 23. The threaded hole 301 mates with the fine threaded rod 23 to achieve a stable connection between the detachable rotating part 3 and the force transmission bolt 2, and the detachable rotating part 3 and the force transmission bolt 2 can be easily disassembled and assembled.

[0028] The thread of the fine thread rod 23 is a self-locking thread, which ensures that after the fine thread rod 23 is connected to the detachable rotating part 3, it can move the coarse thread rod 22 after reversing.

[0029] The other end of the detachable rotating part 3 is provided with a rotating end head 302, which facilitates the rotation of the rotating end head 302.

[0030] Specifically, both the force-transmitting end 21 and the rotating end 302 have hexagonal cross sections, which facilitates the rotation of the force-transmitting end 21 and the rotating end 302 with a wrench, thereby facilitating the movement of the detachable rotating part 3 and the force-transmitting bolt 2.

[0031] The length of the detachable rotating part 3 is greater than the sum of the length of the smooth inner wall of the mounting hole 101 and the width of the groove, so that the force transmission bolt 2 can be smoothly pushed into place through the hand hole with a torque wrench, and the detachable rotating part 3 can be easily disassembled.

[0032] The outer diameter of the detachable rotating part 3 is smaller than the inner diameter of the mounting hole 101, so as to prevent the detachable rotating part from getting stuck and thus being unable to be removed smoothly.

[0033] Specifically, the force transmission bolt 2 is a metal rod, the bolt sleeve 1 is a PE pipe or a metal pipe, and the outer surface of the bolt sleeve 1 is textured to increase the contact friction between the bolt sleeve 1 and the assembled block 5, thereby achieving a stable connection between the bolt sleeve 1 and the assembled block 5.

[0034] The dimensions of the force transmission bolt 2 should be determined based on the design load transfer calculation, and then the structural dimensions of the bolt sleeve should be determined.

[0035] The force transmission key structure can be installed on the side wall sections and middle plate sections of prefabricated assembled stations, and the installation position is not restricted. The force transmission key structure can be perpendicular to the vertical plane of the structure, or at a certain angle to the vertical plane of the structure for ease of installation.

[0036] Reference Figure 2 The specific steps for using the force transmission key in this application include: removing the steel support; after the prefabricated block 5 is installed in place, manually inserting the detachable rotating part 3 into the bolt sleeve 1 from the inside of the station; using a torque wrench to tighten the detachable rotating part 3 and the force transmission bolt 2; continuing to rotate to push out the force transmission bolt 2 and push it into close contact with the retaining structure, thus serving as the force transmission structure between the retaining structure and the prefabricated block 5. Reversing the torque wrench removes the detachable rotating part 3 and reuses it. After the backfilling of the trench is completed, the grouting head 4 is installed on the bolt sleeve 1, and grouting into the bolt sleeve 1 achieves sealing and water-stopping of the force transmission key structure.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated station force transmission key, characterized in that, It includes a bolt sleeve (1) integrally formed with the assembled block (5), the bolt sleeve (1) is internally threaded with a force transmission bolt (2), and a detachable rotating part (3) threadedly connected to the force transmission bolt (2) is provided on one side of the bolt sleeve (1).

2. The prefabricated station force transmission key according to claim 1, characterized in that, The force-transmitting bolt (2) includes a force-transmitting end (21), a coarse thread rod (22), and a fine thread rod (23). The force-transmitting end (21), the coarse thread rod (22), and the fine thread rod (23) are connected in sequence. The coarse thread rod (22) is threadedly engaged with the bolt sleeve (1), and the fine thread rod (23) is threadedly connected with the detachable rotating part (3).

3. A prefabricated station force transmission key according to claim 2, characterized in that, The bolt sleeve (1) is provided with a mounting hole (101), both ends of the mounting hole (101) are provided with threads, and the inner wall of the middle of the threads at both ends of the mounting hole (101) is smooth and without threads.

4. A prefabricated station force transmission key according to claim 3, characterized in that, One end of the detachable rotating part (3) is provided with a threaded hole (301) that mates with the fine threaded rod (23).

5. A prefabricated station force transmission key according to claim 4, characterized in that, The thread of the fine thread rod (23) is a self-locking thread.

6. A prefabricated station force transmission key according to claim 4, characterized in that, The other end of the detachable rotating component (3) is provided with a rotating end (302).

7. A prefabricated station force transmission key according to claim 6, characterized in that, Both the force-transmitting end (21) and the rotating end (302) have hexagonal cross sections.

8. A prefabricated station force transmission key according to any one of claims 2-7, characterized in that, The length of the detachable rotating part (3) is greater than the sum of the smooth inner wall length of the mounting hole (101) and the width of the groove.

9. A prefabricated station force transmission key according to claim 8, characterized in that, The outer diameter of the detachable rotating part (3) is smaller than the inner diameter of the mounting hole (101).

10. A prefabricated station force transmission key according to claim 9, characterized in that, The force transmission bolt (2) is a metal rod, the bolt sleeve (1) is a PE pipe or a metal pipe, and the outer surface of the bolt sleeve (1) is textured.

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