CN220725789U - Prestressed fish web girder steel strand wire tension device - Google Patents
Prestressed fish web girder steel strand wire tension device Download PDFInfo
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- CN220725789U CN220725789U CN202322014101.1U CN202322014101U CN220725789U CN 220725789 U CN220725789 U CN 220725789U CN 202322014101 U CN202322014101 U CN 202322014101U CN 220725789 U CN220725789 U CN 220725789U
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Abstract
The utility model relates to a prestress fish web girder steel strand expanding device, which comprises a steel strand penetrating frame and a fish web girder supporting frame, wherein the expanding device is arranged between the steel strand penetrating frame and the fish web girder supporting frame; the sheet feeding device comprises: the device comprises two steel plates, a split bolt rod, two vertical supporting blocks and two transverse supporting blocks; according to the utility model, the nut of the split bolt is adjusted to enable the vertical supporting block to transversely move and drive the transverse supporting block to move up and down, so that the height of the central position of the steel strand is reduced, the steel strand is loosened, and the purpose of prestress tension release is achieved.
Description
Technical Field
The utility model relates to the field of foundation pit supporting methods, in particular to a prestress fish web girder steel strand stretching device.
Background
Along with the continuous utilization of urban and underground space, the construction of high-rise buildings, the construction of large municipal facilities and the development of a large amount of underground space promote the rapid development of foundation pit engineering, and related engineering technologies gradually mature. For the construction of foundation pit engineering, reasonable foundation pit supporting structure design and construction are needed by combining the conditions of geological conditions, surrounding environments and the like. The more outstanding prestressed fish web girder supporting system can realize reliable control of foundation pit deformation, realize recovery and reuse of supporting materials, and has the characteristics of large construction operation space in the pit and small occupation of underground space around the pit.
However, how to quickly detach the steel strands at the end of the fish belly sill structure and how to adjust the prestress in the process of removing the fish belly sill is still a technical problem which is difficult to solve.
The existing steel strand dismantling method for the fish web beam comprises two methods: firstly, pressurizing by using a jack, removing the fixed clamping piece in a mode of extending the steel strand, and then removing the steel strand, wherein the method is unfavorable for rapid construction because the inner space of the fish web beam tensioning device is too small, so that the removing time is too long; secondly, all the steel strands are cut off by using a flame knife, the method has the advantages that the steel strands still have stress, the safety problem is easy to cause due to sudden fracture, the cut steel strands cannot be reused in an allowable range, and if the prestress needs to be adjusted, the prestress needs to be applied to the supporting structure by using new steel strands again after the steel strands are cut off, so that the defects are more.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides a prestress fish web girder steel strand tension device, and solves the problems of difficult and dangerous prestress tension of the steel strand in the process of dismantling the prestress fish web girder.
In order to solve the technical problems, the utility model is realized as follows:
the prestress fish web girder steel strand stretching device comprises a steel strand penetrating frame and a fish web girder supporting frame, wherein the stretching device is arranged between the steel strand penetrating frame and the fish web girder supporting frame; the device is characterized in that the device comprises: the device comprises two steel plates, a split bolt rod, two vertical supporting blocks and two transverse supporting blocks;
the two steel plates are as follows: the two are symmetrically arranged up and down and are used for fixing the tension device between the steel strand penetrating frame and the fish belly beam supporting frame;
the two transverse supporting blocks are as follows: the shape of the steel plates is trapezoidal, the steel plates are symmetrically arranged between the two steel plates, and the long sides of the trapezoid are connected with the steel plates;
the two vertical supporting blocks are as follows: the two vertical support blocks are vertically and symmetrically arranged between the two transverse support blocks, and the waist parts at the two sides of the two vertical support blocks are attached to the waist parts at the two sides of the two transverse support blocks;
the split bolt rod comprises: and the two vertical supporting blocks are transversely connected and used for adjusting the distance between the two vertical supporting blocks, so that the distance between the two horizontal supporting blocks is adjusted.
The prestress fish web girder steel strand releasing device is characterized in that: still include connecting bolt, connecting bolt uses high-strength bolt for with putting the device of opening and fix between steel strand wires and wear the beam frame and fish web roof beam support frame.
The prestress fish web girder steel strand releasing device is characterized in that: the two transverse supporting blocks are welded with the steel plate into a whole.
The prestress fish web girder steel strand releasing device is characterized in that: the reinforcing device comprises rib plates, flat plates and vertical split bolt rods, wherein the rib plates are welded on the transverse supporting blocks respectively, the holes in the rib plates are used for connecting the transverse supporting blocks, the lower parts of the rib plates are connected with the flat plates, and the vertical split bolt rods are connected between the flat plates.
The prestress fish web girder steel strand releasing device is characterized in that: the transverse supporting blocks and the vertical supporting blocks are solid iron blocks.
The beneficial effects of the utility model are as follows: according to the technical scheme, the prestress fish web girder steel strand stretching device comprises a steel strand penetrating frame and a fish web girder supporting frame, and the stretching device is arranged between the steel strand penetrating frame and the fish web girder supporting frame; the sheet feeding device comprises: the device comprises two steel plates, a split bolt rod, two vertical supporting blocks and two transverse supporting blocks, wherein the vertical supporting blocks transversely move through adjusting nuts of the split bolts, the transverse supporting blocks are driven to move up and down, the height of the center position of a steel strand is reduced, the steel strand is loosened, and the purpose of prestress tension release is achieved.
The prestress fish web beam steel strand releasing and tensioning device solves the problems that the steel strand is excessively long in dismantling time and is not beneficial to quick construction; the problem that the steel wire cannot be reused in an allowable range after being cut by the flame knife is solved, and the use quantity of the steel wire strands is saved;
the application is an independent individual and can be repeatedly used for many times; the installation and the tension pre-stressing construction are simple and safe, and the construction safety is greatly improved while the convenience is provided for constructors; and the fish belly sill support frame is applicable to all fish belly sill support frames and can be widely popularized and used.
Drawings
The utility model is described in further detail below with reference to the attached drawings and embodiments:
FIG. 1 is a schematic diagram of a tensile state of a prestress fish web girder steel strand releasing device;
FIG. 2 is a schematic view of a prestressed fish web girder steel strand releasing device in a loose state;
FIG. 3 is a schematic drawing showing the tensile comparison of the prestressed fish web girder steel strand in use;
fig. 4 is a schematic diagram showing a comparison of the tensile side view directions of the prestressed fish web girder steel strands.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the embodiments of the present application, are within the scope of the claimed utility model.
Example 1:
as shown in fig. 1: the prestress fish web girder steel strand stretching device comprises a steel strand penetrating frame 7 and a fish web girder supporting frame 8, wherein the stretching device is arranged between the steel strand penetrating frame and the fish web girder supporting frame; the sheet feeding device comprises: the device comprises two steel plates, a split bolt rod, two vertical supporting blocks and two transverse supporting blocks;
the two steel plates are as follows: the two are symmetrically arranged up and down and are used for fixing the tension device between the steel strand penetrating frame and the fish belly beam supporting frame;
further, the fish belly beam support frame also comprises a connecting bolt, wherein the connecting bolt uses a high-strength bolt and is used for fixing the tension device between the steel strand beam penetrating frame and the fish belly beam support frame.
The two transverse supporting blocks are as follows: the shape of the steel plates is trapezoidal, the steel plates are symmetrically arranged between the two steel plates, and the long sides of the trapezoid are connected with the steel plates;
further, the two transverse supporting blocks are welded with the steel plate into a whole.
The two vertical supporting blocks are as follows: the two vertical support blocks are vertically and symmetrically arranged between the two transverse support blocks, and the waist parts at the two sides of the two vertical support blocks are attached to the waist parts at the two sides of the two transverse support blocks;
further, the transverse supporting blocks and the vertical supporting blocks are solid iron blocks.
The split bolt rod comprises: and the two vertical supporting blocks are transversely connected and used for adjusting the distance between the two vertical supporting blocks, so that the distance between the two horizontal supporting blocks is adjusted.
Further, the vertical split bolt comprises a reinforcing device, wherein the reinforcing device comprises rib plates, flat plates and vertical split bolt rods, the rib plates are welded on the transverse supporting blocks respectively, the holes in the rib plates are used for connecting the transverse supporting blocks, the lower parts of the rib plates are connected with the flat plates, and the vertical split bolt rods are connected between the flat plates.
Example 2:
taking the cross section dimension of the fish belly sill support frame as an example, 40cm is used for describing the dimension of the expanding device:
1-a steel plate, wherein the size of the steel plate is consistent with the cross section size of the fish belly sill support frame, the thickness of the steel plate is 6mm, and the steel plate is 40 multiplied by 40 cm;
2-connecting bolts, namely M22-type high-strength bolts are used;
3-rib plates, wherein the rib plates are steel plates with the thickness of 6mm;
4-split bolt bar, using M16 split bolts;
5-a vertical supporting block, wherein the vertical supporting block is a solid iron block, a middle opening is used for connecting the two supporting blocks, the section width is 36cm, and the height is 48cm;
6-a transverse supporting block, wherein the transverse supporting block is a solid iron block, a middle opening is used for connecting the two supporting blocks, the section width is 36cm, and the length is 36cm;
the concrete installation and construction method is as follows:
1. and (3) installing a sheet releasing device:
(1) the installation of the tension device is carried out when the bracket is installed, the tension device is fixed between the steel strand bundle penetrating frame and the fish belly by using a high-strength bolt, and the beam supporting frame is fixed between the steel strand bundle penetrating frame and the fish belly;
(2) adjusting the split bolt rod to adjust the height of the tension device to the maximum;
(3) and tensioning the prestressed fish belly sill steel strand after the connection is completed, and applying prestress.
2. And (5) placing and removing the steel strands:
(1) adjusting the nuts of the split bolt rods to enable the vertical supporting blocks to move transversely;
(2) the height of the transverse supporting block is reduced after the vertical supporting block is displaced, and the steel stranded wires gradually become a loose state (see fig. 2);
(3) taking out the clamping piece on the anchor backing plate, and then drawing out the steel strand to finish the dismantling of the steel strand;
3. and (3) adjusting prestress of the fish web girder:
(1) if the prestress needs to be added to the fish belly sill, the step 2 can be repeated to re-stretch after the prestress is released, and whether the prestress is stretched in place or not is determined by a jack pressure gauge;
(2) if the prestress of the fish belly sill needs to be reduced, the fish belly sill can be implemented by reducing the height of the tension device, if the prestress needs to be accurately controlled, the 2 steps can be repeated to re-tension the fish belly sill after the prestress is released, and whether the fish belly sill is tensioned in place or not is determined by a jack pressure gauge.
The embodiments provided in the present application are not intended to limit the present application, and although the present application has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present application are intended to be included in the protection scope of the present application.
Claims (5)
1. The prestress fish web girder steel strand stretching device comprises a steel strand penetrating frame and a fish web girder supporting frame, wherein the stretching device is arranged between the steel strand penetrating frame and the fish web girder supporting frame; the device is characterized in that the device comprises: the device comprises two steel plates, a split bolt rod, two vertical supporting blocks and two transverse supporting blocks;
the two steel plates are as follows: the two are symmetrically arranged up and down and are used for fixing the tension device between the steel strand penetrating frame and the fish belly beam supporting frame;
the two transverse supporting blocks are as follows: the shape of the steel plates is trapezoidal, the steel plates are symmetrically arranged between the two steel plates, and the long sides of the trapezoid are connected with the steel plates;
the two vertical supporting blocks are as follows: the two vertical support blocks are vertically and symmetrically arranged between the two transverse support blocks, and the waist parts at the two sides of the two vertical support blocks are attached to the waist parts at the two sides of the two transverse support blocks;
the split bolt rod comprises: and the two vertical supporting blocks are transversely connected and used for adjusting the distance between the two vertical supporting blocks, so that the distance between the two horizontal supporting blocks is adjusted.
2. The prestressed fish web steel strand tensioning device of claim 1, wherein: still include connecting bolt, connecting bolt uses high-strength bolt for with putting the device of opening and fix between steel strand wires and wear the beam frame and fish web roof beam support frame.
3. The prestressed fish web steel strand tensioning device of claim 1, wherein: the two transverse supporting blocks are welded with the steel plate into a whole.
4. The prestressed fish web steel strand tensioning device of claim 1, wherein: the reinforcing device comprises rib plates, flat plates and vertical split bolt rods, wherein the rib plates are welded on the transverse supporting blocks respectively, the holes in the rib plates are used for connecting the transverse supporting blocks, the lower parts of the rib plates are connected with the flat plates, and the vertical split bolt rods are connected between the flat plates.
5. The prestressed fish web steel strand tensioning device of claim 1, wherein: the transverse supporting blocks and the vertical supporting blocks are solid iron blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322014101.1U CN220725789U (en) | 2023-07-28 | 2023-07-28 | Prestressed fish web girder steel strand wire tension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322014101.1U CN220725789U (en) | 2023-07-28 | 2023-07-28 | Prestressed fish web girder steel strand wire tension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220725789U true CN220725789U (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322014101.1U Active CN220725789U (en) | 2023-07-28 | 2023-07-28 | Prestressed fish web girder steel strand wire tension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220725789U (en) |
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2023
- 2023-07-28 CN CN202322014101.1U patent/CN220725789U/en active Active
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