CN210238167U - A equipment that is used for whole railway roadbed sleeper tip splayed crack to control - Google Patents
A equipment that is used for whole railway roadbed sleeper tip splayed crack to control Download PDFInfo
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- CN210238167U CN210238167U CN201920901099.0U CN201920901099U CN210238167U CN 210238167 U CN210238167 U CN 210238167U CN 201920901099 U CN201920901099 U CN 201920901099U CN 210238167 U CN210238167 U CN 210238167U
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- corrugated plate
- sleeper
- track bed
- splayed
- crack control
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Abstract
A splayed crack control device for the end part of an integral track bed sleeper consists of a corrugated plate (1), a horizontal cross rod (2) and a vertical support rod (3); the corrugated plate (1) is a thin plate with a smooth surface, and the thin plate is longitudinally placed in a distance of 5-8 cm from the end of the sleeper (5) along the whole track bed (4). After the splayed crack control device is installed at a fixed position, the splayed crack at the end part of the sleeper is formed and then does not extend forwards when extending to the corrugated plate, so that the splayed crack of the whole track bed at the end part of the sleeper is limited to be developed.
Description
Technical Field
The utility model relates to a control technology that is used for whole railway roadbed sleeper tip splayed crack.
Background
The railway ballastless track structure adopts a concrete integral track bed and has the characteristics of a concrete structure. However, in northwest areas of China, due to the fact that the climate has the characteristics of drought, strong wind, large day and night temperature difference and the like, the whole track bed concrete is easy to shrink in the construction, operation and other stages, and cracks are generated when stress generated by shrinkage is larger than tensile strength of the concrete.
For the sleeper adopted by the railway integral track bed at the present stage, because the chamfer radius of the rail end corner part is too small, the concrete of the integral track bed is easy to form stress concentration at the corner part of the sleeper, thereby causing the splayed crack of the integral track bed plate at the corner part of the sleeper. Such cracking can reduce the load bearing capacity and durability of the monolithic ballast bed. Research shows that splayed cracks are firstly cracked on the surface of the connecting part of the integral ballast bed and the corner of the sleeper, then the cracks are gradually lengthened and deepened, and the cracks are further developed only if the further development of the cracks cannot be effectively prevented due to the fact that the number of the steel bars in the integral ballast bed is less.
At the present stage, in order to better solve the splayed cracks of the whole track bed at the end part of the sleeper, the following methods are mainly adopted: (1) and reinforcing the construction process of the concrete at the construction stage and the maintenance of the concrete. However, the method has a good effect on controlling and controlling the cracks in the concrete setting and hardening stage, but has little effect on developing the cracks caused by the concrete shrinkage cracks, the temperature stress and the like in the later stage. (2) And repairing the crack in time. However, cracks are generated at the end of the whole ballast bed sleeper due to many reasons, and the stress generated at the position is complicated, so that it is difficult to control the further development of the cracks even if the cracks are repaired. In such a case, a device that prevents splayed cracks at the ends of the tie from propagating further is highly desirable for crack control.
Disclosure of Invention
The utility model aims at providing an equipment that is used for whole railway roadbed sleeper tip splayed crack to control.
The utility model relates to a splayed crack control device for the end part of a whole railway bed sleeper, which consists of a corrugated plate 1, a horizontal cross rod 2 and a vertical support rod 3; the corrugated plate 1 is a thin plate with a smooth surface, and the thin plate is longitudinally placed in a distance of 5-8 cm away from the end of the sleeper 5 along the whole track bed 4.
The utility model has the advantages that: after the splayed crack control device is installed at a fixed position, the splayed crack at the end part of the sleeper is formed and then does not extend forwards when extending to the corrugated plate, so that the splayed crack of the whole track bed at the end part of the sleeper is limited to be developed. The structure form of this patent is fairly simple, and the practicality is strong, and the low price can not produce environmental pollution moreover, and economic benefits is showing, has fine using value.
Drawings
Fig. 1 is a perspective view of a crack control device, fig. 2 is a plan view of the crack control device, fig. 3 is a sectional view a-a, fig. 4 is a sectional view B-B, fig. 5 is a plan view of a mounting portion of the crack control device, and fig. 6 is a sectional view C-C.
Detailed Description
As shown in fig. 1-6, the utility model relates to a splayed crack control device for the end of a whole track bed sleeper, which comprises a corrugated plate 1, a horizontal cross rod 2 and a vertical support rod 3; the corrugated plate 1 is a thin plate with a smooth surface, and the thin plate is longitudinally placed in a distance of 5-8 cm away from the end of the sleeper 5 along the whole track bed 4.
As shown in fig. 1 and 6, the corrugated plate 1 is positioned in the monolithic track bed 4 such that the upper end is flush with the upper surface of the monolithic track bed 4 and the lower end is above the reinforcing steel bars 7 arranged in the monolithic track bed.
As shown in fig. 1, the corrugated plate 1 has a corrugated shape in a horizontal longitudinal section, and the corrugated shape may be a sine wave or an arc wave, and the minimum radius of curvature of the sine wave and the arc wave is larger than the radius of curvature which causes local stress concentration.
As shown in fig. 1 to 6, the horizontal cross rods 2 are connected with the corrugated plate 1 at the middle part of the height of the corrugated plate 1, and the lower ends of the vertical support rods 3 are flush with the lower end of the corrugated plate 1; the cross sections of the horizontal cross bar 2 and the vertical support bar 3 are circular.
The utility model discloses a further expand the utility model below with the description attached drawing, as shown in fig. 1~ 6, (1) the splayed crack control device of the utility model comprises wave plate 1, horizontal pole 2, vertical support rod 3 triplex. The corrugated plate 1 is a thin plate with a smooth surface, and the thin plate is placed in a certain distance range from the end part of the sleeper 5 along the longitudinal direction of the whole track bed 4 to prevent splayed cracks 6 of the whole track bed 4 at the end part of the sleeper 5 from further developing.
(2) The upper end of the corrugated plate 1 is flush with the upper surface of the integral track bed 4, the lower end of the corrugated plate is more than 7 laying steel bars in the integral track bed, and the material of the corrugated plate 1 meets the following characteristics: high rigidity, high resistance to rust and ageing.
(3) The longitudinal section of the corrugated plate 1 along the horizontal direction is in a waveform, the waveform can adopt sine waves or arc waves, and the minimum curvature radius of the sine waves and the arc waves is larger than the curvature radius which causes the stress concentration to be locally generated.
(4) The horizontal cross rod 2 is connected with the corrugated plate 1 in the middle of the height of the corrugated plate 1, and the lower end of the vertical support rod 3 is flush with the lower end of the corrugated plate 1. The cross sections of the horizontal cross rods 2 and the vertical supporting rods 3 are circular, the horizontal cross rods 2 and the vertical supporting rods 3 mainly have the function of increasing the bonding performance of the corrugated plate 1 and the concrete of the whole track bed 4, and meanwhile, the corrugated plate 1 is supported during construction.
The utility model discloses an implementation process is:
(1) pouring concrete of the integral ballast bed 4, and vibrating;
(2) concrete at the parts of the corrugated plate 1, the horizontal cross rods 2 and the vertical support rods 3 is raked open, and the concrete raking-open amount is relatively small due to the fact that the corrugated plate 1, the horizontal cross rods 2 and the vertical support rods 3 occupy small space;
(3) placing the corrugated plate 1 at a designed position and fixing;
(4) concrete is filled in the corrugated plates 1, the horizontal cross rods 2 and the vertical support rods 3, the concrete is compacted by adopting a steel bar or other methods, and then the surface of the whole track bed 4 is plastered.
Claims (4)
1. An equipment that is used for whole railway roadbed sleeper tip splayed crack control which characterized in that: the splayed crack control equipment consists of a corrugated plate (1), a horizontal cross rod (2) and a vertical supporting rod (3); the corrugated plate (1) is a thin plate with a smooth surface, and the thin plate is longitudinally placed in a distance of 5-8 cm away from the end of the sleeper (5) along the whole track bed (4).
2. The device for splay crack control of monolithic track bed sleeper ends according to claim 1, characterized in that the position of the corrugated plate (1) inside the monolithic track bed (4) is such that the upper end is flush with the upper surface of the monolithic track bed (4) and the lower end is above the laying rebars (7) inside the monolithic track bed.
3. Device for splay crack control of the ends of monolithic railroad bed sleepers according to claim 1, characterized in that the undulated plate (1) has a wave shape in the horizontal direction, which may be a sine wave or an arc wave, the minimum radius of curvature of which is greater than the radius of curvature which causes local stress concentration.
4. The device for splayed crack control of the end of an integral ballast bed sleeper according to claim 1, characterized in that the horizontal cross bars (2) are connected with the corrugated plate (1) in the middle of the height of the corrugated plate (1), and the lower ends of the vertical support bars (3) are flush with the lower end of the corrugated plate (1); the cross sections of the horizontal cross bar (2) and the vertical support bar (3) are circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920901099.0U CN210238167U (en) | 2019-06-17 | 2019-06-17 | A equipment that is used for whole railway roadbed sleeper tip splayed crack to control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920901099.0U CN210238167U (en) | 2019-06-17 | 2019-06-17 | A equipment that is used for whole railway roadbed sleeper tip splayed crack to control |
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| Publication Number | Publication Date |
|---|---|
| CN210238167U true CN210238167U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920901099.0U Active CN210238167U (en) | 2019-06-17 | 2019-06-17 | A equipment that is used for whole railway roadbed sleeper tip splayed crack to control |
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| CN (1) | CN210238167U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199574A (en) * | 2021-04-25 | 2021-08-03 | 北华大学 | Method for preventing end face of wood from cracking seriously |
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2019
- 2019-06-17 CN CN201920901099.0U patent/CN210238167U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199574A (en) * | 2021-04-25 | 2021-08-03 | 北华大学 | Method for preventing end face of wood from cracking seriously |
| CN113199574B (en) * | 2021-04-25 | 2023-03-03 | 北华大学 | Method for preventing end face of wood from cracking seriously |
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