Steel strand locking mechanism for prestressed fish-belly steel support and construction method thereof

Abstract

The present application relates to the field of foundation pit support structures, and in particular to a steel strand locking mechanism for a prestressed fish-belly steel support and a construction method thereof, which comprises a base and a support frame arranged at one end of the base, a mounting seat provided in the support frame, a plurality of anchors provided in the mounting seat, a plurality of steel strands provided on one side of the base, one end of each of the plurality of steel strands being arranged at an end of the base away from the support frame, and the other ends extending into the anchors, a mounting frame provided on the side wall of the base, a plurality of partitions for separating the steel strands provided in the mounting frame, the plurality of partitions being arranged at intervals in the vertical direction, an adjustment assembly for adjusting the position of the partitions provided on the mounting frame, a connector provided between the mounting frame and the base, and the plurality of connectors being connected to each other. The present application has the effect of reducing wear on the steel strands and extending the service life of the steel strands.

Description

Technical Field

[0001] The present application relates to the field of foundation pit support structures, and in particular to a steel strand locking mechanism for a prestressed fish-belly steel support and a construction method thereof. Background Art

[0002] With the advancement of technology, a prestressed fish-belly steel support structure has been promoted, which uses the tensile stress of the steel strands to offset the pressure of the inner wall of the foundation pit on the pillars inside the foundation pit, so as to improve the stability of the support structure inside the foundation pit.

[0003] Currently, during the tensioning process, a large number of strands overlap at the tensioning ends of the strands, causing significant friction between the strands and between the strands and the steel structure, leading to strand wear. After construction in the foundation pit is completed, the fish-belly steel supports are dismantled and the strands are recycled for multiple uses. After repeated use, the tensioning ends of the strands are prone to severe wear and tear, including wire breakage. Summary of the Invention

[0004] In order to reduce the wear of steel strands and extend their service life, the present application provides a steel strand locking mechanism for a prestressed fish-belly steel support and a construction method thereof.

[0005] This application provides a steel strand locking mechanism for a prestressed fish-belly steel support, which adopts the following technical solution:

[0006] A steel strand locking mechanism for a prestressed fish-belly steel support comprises a base and a support frame arranged at one end of the base, a mounting seat being provided in the support frame, a plurality of anchors being provided in the mounting seat, a plurality of steel strands being provided on one side of the base, one end of the plurality of steel strands being arranged on the base away from one end of the support frame, and the other end extending into the anchor, a mounting frame being provided on the side wall of the base, a plurality of partitions for separating the steel strands being provided in the mounting frame, a plurality of the partitions being arranged at intervals in the vertical direction, an adjusting component for adjusting the position of the partition being provided on the mounting frame, a connecting piece being provided between the mounting frame and the base, and the connecting piece being connected to each other.

[0007] By adopting the above technical solution, the separator separates the multiple steel strands, reducing friction between the tensioned ends of the steel strands, reducing wear on the steel strands, and extending their service life. The adjustment assembly adjusts the position of the separator within the installation frame, allowing the separator to better separate the multiple steel strands.

[0008] Optionally, the separator is a separator roller, and a plurality of annular separator grooves are provided on the separator roller.

[0009] By adopting the above technical solution, each steel strand corresponds to a separation groove, which facilitates the separation of different steel strands, further increases the gap between the steel strands, further reduces the wear of the steel strands, and extends the service life of the steel strands.

[0010] Optionally, a plurality of parallel recesses are provided on the installation frame, and the plurality of recesses are spaced apart on opposite side walls of the installation frame;

[0011] The adjustment assembly includes a plurality of sliders and a plurality of limit blocks, wherein the sliders are arranged at the upper and lower ends of the partition, and the limit blocks are arranged at the upper and lower ends of the partition. A plurality of slide rails are arranged in parallel on the inner wall of the installation frame, and the slide rails are arranged at intervals at the upper and lower ends of the partition. The sliders are arranged on the slide rails, and a connecting rod is provided on the side of the limit block facing the slider, and a socket for inserting the connecting rod is provided on the slider;

[0012] The inner wall of the displacement groove is provided with a latching tooth, and the side wall of the limiting block is provided with a limiting tooth engaged with the latching tooth.

[0013] By adopting the above technical solution, the slider slides on the slide rail to facilitate the adjustment of the spacing between the partitions, and the limit block is positioned by the engagement of the latch teeth and the limit teeth. The limit block limits the further sliding of the slider on the slide rail, thereby realizing the adjustment and positioning of the partition in the installation frame.

[0014] Optionally, a positioning column is provided in the socket, a first magnetic block is provided on the side of the positioning column facing away from the slider, a positioning hole for inserting the positioning column is opened on the side of the connecting rod facing away from the limit block, and a second adsorption block is provided in the positioning hole.

[0015] By adopting the above technical solution, the first magnetic block and the second magnetic block connect the slider and the limit block, and the connection between the positioning column limit block and the slider is reinforced, thereby improving the stability of the connection between the slider and the limit block.

[0016] Optionally, the connecting member includes a connecting column and a plurality of blocks, the plurality of blocks are spaced apart on the side wall of the connecting column, the connecting column is provided with a plurality of intersecting grooves at one end of the block, a connecting hole for inserting the connecting column is provided at one end of the mounting frame, a clamping hole for clamping the block is provided on the base, and a clamping block is provided at the end of the connecting column away from the block.

[0017] By adopting the above technical solution, the expansion structure of the stop block is utilized to expand the stop block after passing through the clamping hole, locking the connecting column in the installation frame, and the stop block and the clamping block clamp the installation frame on the base, thereby improving the stability of the connection between the installation frame and the base.

[0018] Optionally, a receiving hole is provided at one end of the connecting column, an expansion block is provided in the receiving hole, a transmission rod is provided in the receiving hole, one end of the transmission rod is connected to the expansion block, and the other end is threadedly connected to the clamping block.

[0019] By adopting the above technical solution, after the stopper is unfolded, the clamping block is rotated to make the expansion block gradually enter the accommodating hole. The expansion block expands the accommodating hole, expands the gap between the stoppers, and improves the stability of the stopper on the base.

[0020] Optionally, a mounting hole is provided on the side wall of the support frame, a distribution plate is provided in the mounting hole, a plurality of threading holes are provided on the distribution plate, and the threading holes are arranged in a one-to-one correspondence with the steel strands.

[0021] By adopting the above technical solution, the wire distribution disc separates the steel strands, reducing the mutual friction of the steel strands during the tensioning process, further reducing the wear of the steel strands, and further extending the service life of the steel strands.

[0022] Optionally, a roller is provided in each threading hole.

[0023] By adopting the above technical solution, the roller reduces the friction between the steel strand and the distribution drum, further reduces the wear of the steel strand, and further extends the service life of the steel strand.

[0024] A construction method for a prestressed fish-belly steel support, based on the above-mentioned steel strand locking mechanism of the prestressed fish-belly steel support, comprises the following steps: first, setting up a base at a construction site, fixing a support frame on the base, and fixing an installation frame on the base using connectors;

[0025] Step 2: Place the separators in the installation frame, adjust the spacing between the separators using the adjustment assembly, and fasten the separators to the installation frame;

[0026] Step three: guide the steel strands through the partitions and anchors in sequence, and tension and anchor the steel strands.

[0027] By adopting the above technical solution, the steel strands are separated and then tensioned, thereby reducing the mutual friction of the steel strands during the tensioning process and extending the service life of the steel strands.

[0028] Optionally, the surface of the steel strand described in step three is coated with a non-bonding protective layer, and after the steel strand is tensioned, a protective film is coated on the surface of the steel strand.

[0029] By adopting the above technical solution, the non-bonding protective layer reduces the concrete bonding on the surface of the steel strand, and the protective film reduces the large amount of dust in the air adsorbed on the surface of the steel strand, thereby reducing the pollution to the steel strand during construction, reducing the external corrosion to the steel strand, and extending the service life of the steel strand.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. Separate multiple steel strands by setting up separators to reduce the friction between the tensioning ends of the steel strands, reduce the wear of the steel strands, and extend the service life of the steel strands;

[0032] 2. By setting up a protective film and a non-bonded protective layer, the corrosion of the steel strands by the external environment is reduced, and the service life of the steel strands is further extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0034] Figure 2 It is a schematic diagram showing the internal structure of the support frame.

[0035] Figure 3 It is a schematic diagram showing the structure of the distribution board.

[0036] Figure 4 It is a schematic diagram showing the structure of the separator.

[0037] Figure 5 It is an exploded view showing the structure of the connector.

[0038] Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0039] Explanation of the accompanying drawings: 1. Base; 2. Support frame; 3. Mounting seat; 4. Steel strand; 5. Anchor; 6. Mounting frame; 7. Connector; 71. Connecting column; 72. Stop block; 73. Cutting groove; 74. Accommodating hole; 75. Transmission rod; 76. Expansion block; 77. Clamping block; 8. Adjustment assembly; 81. Slider; 82. Limiting block; 83. Connecting rod; 84. Socket; 85. Positioning column; 86. First magnetic block; 87. Second magnetic block; 88. Limiting tooth; 9. Separator; 10. Separation groove; 11. Distribution plate; 12. Threading hole; 13. Roller; 14. Clamping hole; 15. Connecting hole; 16. Slide rail; 17. Make way groove; 18. Clamping tooth; 19. Mounting hole; 20. Positioning hole. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-6 This application is described in further detail.

[0041] The embodiment of the present application discloses a steel strand locking mechanism for a prestressed fish-belly steel support. Figure 1 and Figure 2The steel strand locking mechanism of the prestressed fish-belly steel support includes a base 1 and a support frame 2 arranged at one end of the base 1. A mounting seat 3 is fixed in the support frame 2, and multiple anchors 5 are installed in the mounting seat 3. Multiple steel strands 4 are installed on the base 1. One end of the steel strand 4 is fixed to the side wall of the base 1, and the other end extends into the anchor 5. By using a tensioning device to tension the steel strand 4, combined with the anchoring effect of the anchor 5, a certain amount of stress is generated in the steel strand.

[0042] Reference Figure 2 and Figure 3 A mounting hole 19 is provided on the side wall of the support frame 2, and a distribution plate 11 is provided in the mounting hole 19. The distribution plate 11 is penetrated by a plurality of threading holes 12 with square cross-sections. The threading holes 12 are arranged in a one-to-one correspondence with the steel strands 4, and a roller 13 is provided on each inner wall of each threading hole 12. After the steel strands 4 pass through the threading holes 12, the steel strands 4 are separated from each other. After the steel strands 4 enter the anchor 5, there are gaps between the steel strands 4. During the tensioning process, the steel strands 4 are relatively independent of each other, reducing the mutual friction between the steel strands 4 and reducing the wear of the steel strands 4. The roller 13 on the distribution plate 11 converts the sliding friction between the steel strands 4 and the distribution plate 11 into rolling friction, reducing the friction between the distribution plate 11 and the steel strands 4, and further reducing the wear of the steel strands 4.

[0043] Reference Figure 4 and Figure 5 The base 1 is detachably connected to a mounting frame 6, and a connector 7 is provided between the mounting frame 6 and the base 1, and the mounting frame 6 and the base 1 are connected to each other through the connector 7. By removing and installing the connector 7, it is convenient to replace the mounting frame 6 of different specifications. The connector 7 includes a connecting column 71 and a plurality of stoppers 72. The plurality of stoppers 72 are arranged at intervals on the side wall of the connecting column 71. A plurality of mutually intersecting grooves 73 are provided on one end of the connecting column 71 provided with the stoppers 72, and the stoppers 72 are arranged between adjacent grooves 73. A receiving hole 74 is passed through the connecting column 71, and the length direction of the receiving hole 74 is parallel to the length direction of the connecting column 71. A truncated cone-shaped expansion block 76 is provided in the receiving hole 74, and the expansion block 76 is arranged at one end of the connecting column 71 provided with the stopper 72. A transmission rod 75 is provided in the receiving hole 74, and one end of the transmission rod 75 is connected to the expansion block 76, and the other end is threadedly connected to a clamping block 77. A connection hole 15 for inserting the connection column 71 is formed on one end of the mounting frame 6 near the base 1. A locking hole 14 communicating with the connection hole 15 is formed on the base 1. Utilizing the expansion structure of the stopper 72, the connection column 71 is inserted from the connection hole 15 into the locking hole 14. After the stopper 72 passes through the locking hole 14, the stopper 72 expands under the action of elasticity, thereby preventing the connection column 71 from being dislodged from the locking hole 14. The clamping block 77 is rotated to cause the transmission rod 75 to pull the expansion block 76 deeper into the receiving hole 74. The expansion block 76 presses against the inner wall of the connection column 71, forcing the stoppers 72 away from each other and improving the blocking effect of the stoppers 72.

[0044] Reference Figure 4 and Figure 5 ,, A plurality of separators 9 for separating the steel strands 4 are provided in the mounting frame 6, and the plurality of separators 9 are arranged at intervals in the vertical direction. In the present embodiment, the separators 9 are specifically separator rollers, and a plurality of annular separator grooves 10 are provided on the side walls of the separator rollers. When the steel strands 4 are arranged on the base 1, they are arranged in layers. Since the steel strands 4 are long and easy to bend, the steel strands 4 are easily disordered and entangled with each other when entering the distribution disk 11. By providing separator rollers and separator grooves 10, each steel strand 4 corresponds to a separator groove 10, which increases the gap between the steel strands 4 and maintains the layering of the steel strands 4. The steel strands 4 are more orderly when passing through the distribution disk 11, which reduces the occurrence of the steel strands 4 entangled with each other and shortens the process of combing the steel strands 4.

[0045] Reference Figure 4 and Figure 5 The mounting frame 6 has a plurality of parallel clearance grooves 17, which are spaced apart on opposite side walls of the mounting frame 6. The mounting frame 6 is provided with an adjustment assembly 8 for adjusting the position of the separator roller. The adjustment assembly 8 includes a plurality of sliders 81 and a plurality of limit blocks 82. The sliders 81 are spaced apart at both ends of the separator roller shaft, and the limit blocks 82 are spaced apart at both ends of the separator roller axis. The limit blocks 82 are disposed within the clearance grooves 17. A connecting rod 83 is fixed to the side of the limit block facing the slider 81, and a socket 84 for inserting the connecting rod 83 is provided on the side of the slider 81 facing the limit block.

[0046] Reference Figure 4 and Figure 5 , a plurality of slide rails 16 are arranged in parallel and at intervals on the inner wall of the mounting frame 6, and the plurality of slide rails 16 are arranged at intervals at both ends of the separation roller axis direction, and the slider 81 is arranged on the slide rail 16. The slider 81 slides on the slide rail 16 to drive the separation roller to move and adjust the gap between the separation rollers. A latching tooth 18 is integrally formed on the inner wall of the clearance groove 17, and a limiting tooth 88 engaging with the latching tooth 18 is provided on the side wall of the limiting block 82. When the limiting block 82 is removed from the clearance groove 17, the slider 81 loses the limiting effect of the limiting block 82, and the slider 81 can slide freely on the slide rail 16. The connecting rod 83 on the limiting block 82 is inserted into the socket 84 so that the latching tooth 18 and the limiting tooth 88 are engaged. The limiting block 82 prevents the slider 81 from sliding further on the slide rail 16, thereby realizing the positioning of the slider 81 on the slide rail 16.

[0047] Reference Figure 5 and Figure 6A positioning post 85 is integrally formed at the center of the socket 84. A first magnetic block 86 is fixed to the side of the positioning post 85 facing away from the slider 81. A positioning hole 20 for inserting the positioning post 85 is provided on the side of the connecting rod 83 facing away from the limit block 82. A second magnetic block 87 is fixed to the inner wall of the positioning hole 20. In this embodiment, the first magnetic block 86 and the second magnetic block 87 are specifically permanent magnets. The limit block 82 and the slider 81 are connected by the first magnetic block 86 and the second magnetic block 87, which is quick and convenient to connect and easy to assemble and disassemble. The provision of the positioning post 85 further enhances the strength of the connection between the connecting rod 83 and the slider 81.

[0048] The embodiment of the present application describes a steel strand locking mechanism for a prestressed fish-belly steel support as follows: Steel strands 4 are guided from one end of a base 1 to a support frame 2. The strands 4 then pass through separation grooves 10 on a separation roller, enter a mounting base 3 through threading holes 12 on a distribution plate 11, and are inserted into an anchor 5. The separation rollers and distribution plate 11 separate the strands 4 from one another, reducing friction between them. A tensioning device tensions the strands 4, completing their installation.

[0049] The embodiment of the present application also discloses a construction method for a prestressed fish-belly steel support, based on the steel strand locking mechanism of the above-mentioned prestressed fish-belly steel support. In step one, a base 1 is erected at the construction site, and a support frame 2 is welded on the base 1. A clamping hole 14 is drilled on the base 1, and a connecting piece 7 is used to penetrate the installation frame 6 and the clamping hole 14 to fix the installation frame 6 on the base 1.

[0050] Step 2: Set the separator 9 in the installation frame 6 and slide the slider 81 to adjust the gap between the separation rollers. After the adjustment of the separation roller spacing is completed, set a limit block 82 on the installation frame 6 and use the limit block 82 to position the slider 81.

[0051] Step three: coating a non-adhesive protective layer on the surface of the steel strand 4 to reduce the amount of concrete that adheres to and solidifies on the surface of the steel strand 4 during construction, thereby reducing corrosion of the steel strand 4 by the concrete.

[0052] One end of the guide steel strand 4 is fixed to the end of the base 1 away from the support frame 2, and the other end is guided to a separator roller, then passed through the threading hole 12 in the distribution plate 11, and finally inserted into the anchor 5 in the mounting base 3. The steel strands 4 are installed layer by layer according to the design requirements, and are arranged gradually from close to the base 1 to away from it. The separator roller separates each layer of steel strands 4. After the steel strands 4 are installed, they are tensioned at the anchor 5 using a tensioning device, and the anchor 5 is used to prevent the steel strands 4 from loosening.

[0053] After the steel strands 4 are tensioned, a protective film is wrapped around the surface of the steel strands 4 to reduce corrosion of the steel strands 4 by external environments such as rainwater.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A steel strand locking mechanism for a prestressed fish-belly steel support, comprising a base (1) and a support frame (2) arranged at one end of the base (1), a mounting seat (3) being arranged in the support frame (2), a plurality of anchors (5) being arranged in the mounting seat (3), a plurality of steel strands (4) being arranged on one side of the base (1), one end of each of the plurality of steel strands (4) being arranged at an end of the base (1) away from the support frame (2), and the other end of each of the plurality of steel strands (4) extending into the anchor (5), characterized in that: A mounting frame (6) is provided on the side wall of the base (1), a plurality of partitions (9) for separating the steel strands (4) are provided in the mounting frame (6), the plurality of partitions (9) being arranged at intervals in the vertical direction, an adjustment assembly (8) for adjusting the position of the partitions (9) is provided on the mounting frame (6), a connecting member (7) is provided between the mounting frame (6) and the base (1), and the mounting frame (6) and the base (1) are connected to each other via the connecting member (7); The separator (9) is a separator roller, and a plurality of annular separator grooves (10) are provided on the separator roller; The installation frame (6) is provided with a plurality of parallel recesses (17), and the plurality of recesses (17) are spaced apart on opposite side walls of the installation frame (6); The adjustment assembly (8) includes a plurality of sliders (81) and a plurality of limit blocks (82), wherein the plurality of sliders (81) are arranged at the upper and lower ends of the partition (9), and the plurality of limit blocks (82) are arranged at the upper and lower ends of the partition (9). A plurality of slide rails (16) are arranged in parallel on the inner wall of the installation frame (6), and the plurality of slide rails (16) are arranged at intervals at the upper and lower ends of the partition (9). The plurality of sliders (81) are arranged on the slide rails (16), and a connecting rod (83) is provided on the side of the limit block (82) facing the slider (81), and a socket (84) for inserting the connecting rod (83) is provided on the slider (81); a latching tooth (18) is provided on the inner wall of the clearance groove (17), and a latching tooth (88) meshing with the latching tooth (18) is provided on the side wall of the limit block (82); A positioning column (85) is provided in the insertion hole (84), and a first magnetic block (86) is provided on the side of the positioning column (85) facing away from the slider (81); a positioning hole (20) for inserting the positioning column (85) is provided on the side of the connecting rod (83) facing away from the limit block (82), and a second magnetic block (87) is provided in the positioning hole (20); A mounting hole (19) is provided on the side wall of the support frame (2), a distribution plate (11) is provided in the mounting hole (19), a plurality of threading holes (12) are provided on the distribution plate (11), and the threading holes (12) are arranged in a one-to-one correspondence with the steel strands (4).

2. The steel strand locking mechanism of the prestressed fish-belly steel support according to claim 1 is characterized in that: The connecting member (7) comprises a connecting column (71) and a plurality of stoppers (72), wherein the plurality of stoppers (72) are arranged at intervals on the side wall of the connecting column (71), the connecting column (71) is provided with a plurality of mutually intersecting grooves (73) at one end of the stopper (72), a connecting hole (15) for inserting the connecting column (71) is provided at one end of the mounting frame (6), a clamping hole (14) for clamping the stopper (72) is provided on the base (1), and a clamping block (77) is provided at one end of the connecting column (71) away from the stopper (72).

3. The steel strand locking mechanism of the prestressed fish-belly steel support according to claim 2 is characterized in that: A receiving hole (74) is provided at one end of the connecting column (71), an expansion block (76) is provided in the receiving hole (74), a transmission rod (75) is provided in the receiving hole (74), one end of the transmission rod (75) is connected to the expansion block (76), and the other end is threadedly connected to the clamping block (77).

4. The steel strand locking mechanism of the prestressed fish-belly steel support according to claim 1 is characterized in that: A roller (13) is provided in each threading hole (12).

5. A construction method for a prestressed fish-belly steel support, based on the steel strand locking mechanism of a prestressed fish-belly steel support according to any one of claims 1 to 4, characterized in that: Step 1: erecting a base (1) at a construction site, fixing a support frame (2) on the base (1), and fixing a mounting frame (6) on the base (1) using a connector (7); Step 2: placing separators (9) in the installation frame (6), adjusting the spacing between the separators (9) using the adjustment assembly (8), and fastening the separators (9) to the installation frame (6); Step three: guide the steel strand (4) to pass through the partition (9) and the anchor (5) in sequence, and tension and anchor the steel strand (4).

6. The construction method of a prestressed fish-belly steel support according to claim 5, characterized in that: The surface of the steel strand (4) described in step three is coated with a non-adhesive protective layer, and after the steel strand (4) is tensioned, a protective film is coated on the surface of the steel strand (4).

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