Expressway reconstruction and extension road surface oblique excavation step splicing structure

Abstract

The application discloses a highway reconstruction and expansion pavement inclined excavation step splicing structure and belongs to the technical field of highway construction. The highway reconstruction and expansion pavement inclined excavation step splicing structure comprises an old roadbed, a new roadbed, a plug-in connector, a connecting column and an adjustable tensile resistance mechanism, the new roadbed is laid on the old roadbed, a plurality of plug-in connectors are arranged between the old roadbed and the new roadbed, the connecting column is fixedly connected to the plug-in connector, and the adjustable tensile resistance mechanism is rotationally connected to the connecting column. The adjustable tensile resistance mechanism is arranged between the old roadbed and the new roadbed, the two connecting columns are connected through the plug-in connector, the tensile strength of the joint part of the new and old roadbeds can be effectively improved, fatigue damage at the joint part can be effectively reduced, the time for cracks to appear on the pavement can be delayed, and the service life of the road can be prolonged.

Description

Technical Field

[0001] This application relates to the field of highway construction technology, and more specifically, to a sloping excavation step splicing structure for highway reconstruction and expansion. Background Technology

[0002] In highway reconstruction and expansion projects, the inclined excavation and step splicing structure is mainly used to solve the connection problem between the old and new pavements during road reconstruction and expansion. This structural form is often used when widening, raising, or reconstructing existing roads, involving the junction of the pavement layer and the roadbed. It solves the problem of earthwork excavation and pavement splicing through inclined steps, ensuring a smooth transition between the new and existing pavements while meeting the stability and usage requirements of the project.

[0003] Design principles and purpose of inclined excavation step splicing structure

[0004] Earthwork excavation: In highway reconstruction and expansion projects, inclined excavation is often required to widen the road surface or adjust the roadbed structure. Inclined excavation usually refers to excavating one side of the road surface at a certain slope to maintain a reasonable slope and connect with the old road surface, so as to achieve a smooth transition between the road surface and the roadbed.

[0005] Stepped excavation helps maintain slope stability during the excavation process, preventing excessive loosening or soil slippage.

[0006] In highway reconstruction and expansion, the inclined excavation and stepped splicing structure is a highly effective transitional design. It ensures a smooth connection between the old and new road surfaces, reducing settlement or cracking issues caused by height differences. Through proper design and construction, it can effectively improve road stability and safety, especially in situations requiring large-scale earthwork excavation and road splicing, where the stepped splicing structure demonstrates its irreplaceable advantages.

[0007] The prior art publication CN220183729U provides a sloping excavation step splicing structure for highway reconstruction and expansion. This device uses sloping excavation steps to overlap the old and new pavement structures in highway reconstruction and expansion projects. Compared with the traditional vertical excavation step overlap, it increases the area of ​​the lateral contact surface. At the same time, the right angle and obtuse angle make it easier for the mixture to be filled and compacted evenly, reducing the need for manual construction. On the other hand, the change in angle makes it easier to compact the joint, ensuring the compaction degree of the joint of the newly paved structure. This can better improve the integrity and continuity of the splicing part and make the stress distribution more uniform.

[0008] While the aforementioned existing technical solutions can achieve the relevant beneficial effects through their structure, they still have the following drawbacks: When the device is in use, the lack of sufficient tensile strength between the old and new road surfaces can lead to uneven stress distribution at the joint under traffic loads, especially under high-frequency traffic or heavy traffic. The lack of sufficient tensile strength at the connection between the old and new road surfaces may cause cracking or separation at the joint, affecting the long-term stability and service life of the road surface.

[0009] In view of this, we propose a diagonal excavation step splicing structure for highway reconstruction and expansion. Utility Model Content

[0010] 1. Technical problems to be solved

[0011] The purpose of this application is to provide a diagonally excavated step splicing structure for highway reconstruction and expansion, in order to solve the problem mentioned in the background art that the lack of sufficient tensile strength at the connection between the old and new road surfaces may lead to cracking or separation at the joint, affecting the long-term stability and service life of the road surface.

[0012] 2. Technical Solution

[0013] A type of inclined excavation step splicing structure for highway reconstruction and expansion includes an old roadbed, a new roadbed, a connector, a connecting column, and an adjustable tensile mechanism, wherein the new roadbed is laid on the old roadbed;

[0014] Multiple connectors are installed between the old roadbed and the new roadbed;

[0015] The connecting post is fixedly installed on the plug connector;

[0016] The adjustable tensile mechanism is rotatably connected to the connecting column.

[0017] Preferably, both the old and new roadbeds are laid in a stepped splicing pattern.

[0018] Preferably, the inner wall of the connector is provided with a plug block that slides in, and a spring is fixedly connected to the inner end of the plug block, with the other end of the spring fixedly connected to the inner wall of the plug block.

[0019] Preferably, one end of the connecting post is provided with a plug hole, which is movably connected to the plug connector and the outer wall of the plug block, and a toothed disc is rotatably connected through the inner wall of one end of the connecting post.

[0020] Preferably, the adjustable tensile mechanism includes a tensile plate, one end of which is rotatably connected to the outer wall of the connecting column, a worm gear is fixedly connected to one end of the tensile plate, a worm is meshed and driven on one side of the worm gear, the worm is rotatably connected to the inner wall of the connecting column, and a gear is fixedly connected to the inner end of the worm, the gear meshing and driving with a gear disc.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of this application are: by setting an adjustable tensile strength mechanism between the old and new roadbeds and connecting the two connecting columns through a plug joint, the tensile strength of the joint between the old and new roadbeds can be effectively improved, fatigue damage at the joint can be effectively reduced, the time for cracks to appear on the road surface can be delayed, and the service life of the road can be extended. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the overall structure of this application;

[0024] Figure 2 This is a cross-sectional view of the connecting columns and other structures in this application.

[0025] Figure 3 This is a schematic diagram of the adjustable tensile mechanism structure of this application;

[0026] The following are the labels in the diagram: 1. Old roadbed; 2. New roadbed; 3. Connector; 4. Connecting post; 5. Adjustable tensile mechanism; 301. Insert block; 302. Spring; 401. Insertion hole; 402. Gear disc; 501. Tensile plate; 502. Worm gear; 503. Worm; 504. Gear. Detailed Implementation

[0027] Please refer to Figures 1-3. This application provides a technical solution:

[0028] A type of inclined excavation step splicing structure for highway reconstruction and expansion includes an old roadbed 1, a new roadbed 2, a plug joint 3, a connecting column 4, and an adjustable tensile mechanism 5, with the new roadbed 2 laid on the old roadbed 1;

[0029] Multiple connectors 3 are installed between the old roadbed 1 and the new roadbed 2;

[0030] The connecting post 4 is fixedly connected to the plug connector 3;

[0031] The adjustable tensile mechanism 5 is rotatably connected to the connecting column 4.

[0032] Specifically, both the old roadbed 1 and the new roadbed 2 are laid in a stepped splicing pattern.

[0033] Furthermore, a plug block 301 is slidably fitted on the inner wall of the plug 3, and a spring 302 is fixedly connected to the inner end of the plug block 301. The other end of the spring 302 is fixedly connected to the inner wall of the plug block 301.

[0034] Furthermore, one end of the connecting post 4 is provided with a plug hole 401, which is movably plugged into the outer wall of the plug connector 3 and the plug block 301. A toothed disc 402 is rotatably connected through the inner wall of one end of the connecting post 4.

[0035] In addition, the adjustable tensile mechanism 5 includes a tensile plate 501, one end of which is rotatably connected to the outer wall of the connecting column 4, a worm gear 502 is fixedly connected to one end of the tensile plate 501, a worm 503 is meshed and driven on one side of the worm gear 502, the worm 503 is rotatably connected to the inner wall of the connecting column 4, and a gear 504 is fixedly connected to the inner end of the worm 503, the gear 504 meshes and drives the gear disc 402.

[0036] The implementation principle of the inclined excavation step splicing structure for highway reconstruction and expansion is as follows: When it is necessary to reconstruct and expand the highway road surface, an inclined step is first excavated on the old roadbed 1. Then, the gear disk 402 is rotated, so that the gear disk 402 drives the worm gear 503 connected to the gear 504 to rotate, so that the worm gear 503 drives the tensile plate 501 connected to the worm wheel 502 to be laid flat and placed in the old roadbed 1. Then, the plug 3 on another connecting post 4 is aligned with the plug hole 401 on the connecting post 4 in the old roadbed 1 and inserted. Under the action of the spring 302, the plug 301 is engaged with the plug hole 401. Then, the new roadbed 2 is laid on the old roadbed 1.

Claims

1. A type of inclined excavation step splicing structure for highway reconstruction and expansion, comprising an old roadbed (1), a new roadbed (2), a connector (3), a connecting column (4), and an adjustable tensile mechanism (5), characterized in that: A new roadbed (2) is laid on the old roadbed (1); Multiple connectors (3) are installed between the old roadbed (1) and the new roadbed (2); The connecting post (4) is fixedly connected to the plug (3); The adjustable tensile mechanism (5) is rotatably connected to the connecting column (4); The adjustable tensile mechanism (5) includes a tensile plate (501), one end of which is rotatably connected to the outer wall of the connecting column (4), a worm gear (502) is fixedly connected to one end of the tensile plate (501), a worm (503) is meshed and driven on one side of the worm gear (502), the worm (503) is rotatably connected to the inner wall of the connecting column (4), and a gear (504) is fixedly connected to the inner end of the worm (503), the gear (504) meshes and drives the gear disc (402).

2. The inclined excavation step splicing structure for highway reconstruction and expansion as described in claim 1, characterized in that: Both the old roadbed (1) and the new roadbed (2) are laid in a stepped splicing pattern.

3. The inclined excavation step splicing structure for highway reconstruction and expansion as described in claim 1, characterized in that: The inner wall of the connector (3) is provided with a sliding fit of a plug block (301), and a spring (302) is fixedly connected to the inner end of the plug block (301). The other end of the spring (302) is fixedly connected to the inner wall of the plug block (301).

4. The inclined excavation step splicing structure for highway reconstruction and expansion as described in claim 1, characterized in that: One end of the connecting column (4) is provided with a plug hole (401), which is movably plugged into the outer wall of the plug connector (3) and the plug block (301). A toothed disc (402) is rotatably connected through the inner wall of one end of the connecting column (4).

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