Old bridge and culvert reinforcing and supporting structure
By designing an adjustable-height reinforced support structure, the problem of insufficient load-bearing capacity of old bridges and culverts was solved, achieving rapid reinforcement and load-bearing capacity improvement, meeting vehicle load requirements, and reducing stress.
Patent Information
- Application Number
- CN202422783368.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The old bridges and culverts have insufficient load-bearing capacity, which necessitates their demolition and reconstruction, resulting in high costs and long-term traffic disruptions.
A reinforced support structure comprising an upper column, a lower column, and support bolts was designed. The upper and lower columns are connected by adjustable support bolts. High-strength bolts and steel are used in the fabrication. The support structure has an adjustable height and is suitable for emergency reinforcement of small bridges and culverts to improve load-bearing capacity.
It enables rapid erection, has strong load-bearing capacity, and can significantly improve the load-bearing capacity of old bridges and culverts, reduce the normal stress of the original bridge deck by 44% to 72%, and meet the requirements of vehicle load and highway Class II load.
Smart Images
Figure CN223497041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction engineering technology, specifically to a reinforcement and support structure for old bridges and culverts. Background Technology
[0002] In engineering construction, there are situations where large equipment crosses old bridges and culverts with insufficient load-bearing capacity. Demolishing and rebuilding these old bridges and culverts is not only expensive and time-consuming, but also affects local traffic. However, if a fast-setting reinforcement and support structure is adopted to improve the load-bearing capacity of old bridges and culverts, a series of long-term and high-cost problems such as demolition and reconstruction can be avoided, and transportation efficiency can be improved to a great extent. Utility Model Content
[0003] In view of this, the present invention provides a reinforcement support structure for old bridges and culverts. The support structure has the function of adjustable support height, which can be conveniently used for emergency reinforcement of small bridges and culverts, and for increasing load level. It has the characteristics of fast erection speed and strong load-bearing capacity.
[0004] A reinforcement support structure for old bridges and culverts includes an upper column, a lower column, and support bolts; the upper and lower ends of the upper and lower columns are respectively fixedly connected to a top plate and a bottom plate, and the support bolts include screws and nuts;
[0005] The upper and lower columns are coaxially fixed together by support bolts. The two ends of the bolt pass through the bottom plate of the upper column and the top plate of the lower column, respectively. Two nuts fix the top and bottom plates to the bolts from the top and bottom sides of the top and bottom plates. The upper column is tightened against the bottom of the beam by turning the nuts.
[0006] Furthermore, the support bolt has a height adjustment range of 100mm.
[0007] Furthermore, ribs are connected between the upper column and the top and bottom plates, and ribs are also connected between the lower column and the top and bottom plates. The ribs are evenly distributed along the circumference of the upper and lower columns.
[0008] Furthermore, the screw and nut are made of 8.8 grade high-strength bolts with a diameter of 28mm, and the upper column, lower column, top plate, bottom plate and rib plate are all made of Q235-B grade steel.
[0009] Furthermore, the upper column has a total height of 400mm, the clear distance between the upper and lower plates of the support bolts is 50mm to 150mm, the height of the lower column varies according to the changes in the bridge span clearance, and the applicable height range for the reinforcement of the support structure is 1500mm to 5000mm.
[0010] Beneficial effects:
[0011] 1. The reinforcement support structure of this utility model consists of three parts: upper column, support bolt, and lower column. The distance between the upper column and the lower column can be adjusted by screws and nuts, and it has the function of adjustable support height. It is convenient for use in emergency reinforcement of small bridges and culverts, and for increasing the load level. It has the characteristics of fast erection speed and strong load-bearing capacity.
[0012] 2. The screw and nut of this utility model are made of 8.8 grade high-strength bolts with a diameter of 28mm. The upper column, lower column, top plate, bottom plate and rib plate are all made of Q235-B grade steel. The column support structure can meet the requirements of vehicle load and highway Class II load. The maximum stress of the screw can be controlled within 300Mpa, and the other maximum stresses can be controlled within 150MPa.
[0013] 3. This utility model uses block units to analyze the load-bearing capacity of the column support and the original bridge coupling. The support column has the most significant effect on improving the normal stress of the original bridge deck, with a reduction of 44% to 72%. Attached Figure Description
[0014] Figure 1 Elevation layout of the support structure for the reinforcement of old bridges and culverts;
[0015] Figure 2 Cross-sectional view of the reinforcement support structure for the old bridge and culvert;
[0016] Figure 3 This is a cross-sectional view of the column support bolts;
[0017] Figure 4 A three-dimensional schematic diagram of the support structure for reinforcing old bridges and culverts.
[0018] Among them, 1-upper column, 2-support bolt, 3-lower column, 4-lower column base plate, 5-lower column top plate, 6-upper column base plate, 7-rib plate, 8-upper column top plate. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0020] Taking a 4m span open culvert with insufficient load-bearing capacity as an example, the elevation drawing is shown below. Figure 1 As shown, see the transverse cross-sectional view. Figure 2 As shown, the prefabricated support structure consists of three parts: upper column 1, support bolts 2, and lower column 3. The upper column is composed of an upper column top plate 8, an upper column bottom plate 6, and ribs 7; the lower column is composed of a lower column top plate 5, ribs 7, and a lower column bottom plate 4; and the support bolts 2 consist of screws and nuts. The upper column 1 has a total height of 400mm, and the clear distance between the upper and lower plates of the support bolts is 50mm to 150mm. The height of the lower column 3 varies according to the clearance of the bridge span. The applicable height range for column support reinforcement is 1500mm to 5000mm.
[0021] In the prefabricated support structure, except for the bolts and nuts which use 28mm diameter 8.8 grade high-strength bolts, all other components are made of Q235-B grade steel. The upper column 1 and lower column 3 have a diameter of 273mm and a wall thickness of 10mm, with rib plate thickness of 8mm. The upper column top plate is 10mm thick, the upper column bottom plate 6 is 18mm thick, the lower column top plate 5 is 18mm thick, and the lower column bottom plate 4 is 10mm thick. A cross-sectional view of the column support bolts is shown below. Figure 3 As shown, the three-dimensional representation of the column support. Figure 4 As shown.
[0022] Before the column support work begins, a solid column foundation must first be established. This is typically done using a concrete foundation or a steel structure enlarged foundation to ensure sufficient vertical support. To ensure the column and bridge base plate are tightly fitted together, support bolt 2 has a 100mm adjustment range; the upper column is tightened to the bottom of the beam by turning the nut. To ensure even stress distribution on the top and bottom plates of the column, a dry-hardened cement leveling mortar, generally of grade C20 or higher, can be applied evenly to the top plate of the column and under the column foundation.
[0023] Taking a column with a total height of 2300mm as an example, the statistical table of the support structure mass of a single column is shown in Table 1.
[0024] Table 1. Statistical Table of Overall Bridge Component Quality /
[0025]
[0026] As can be seen, the reinforced support structure of this utility model weighs several hundred kilograms and is easy to transport and install. With the cooperation of four people, the installation work can be completed quickly.
[0027] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A reinforcement and support structure for old bridges and culverts, characterized in that, It includes an upper column, a lower column, and supporting bolts; the upper and lower ends of the upper and lower columns are respectively fixedly connected to the top plate and the bottom plate, and the supporting bolts include a screw and a nut; The upper and lower columns are coaxially fixed together by support bolts. The two ends of the bolt pass through the bottom plate of the upper column and the top plate of the lower column, respectively. Two nuts fix the top and bottom plates to the bolts from the top and bottom sides of the top and bottom plates. The upper column is tightened against the bottom of the beam by turning the nuts.
2. The old bridge and culvert reinforcement support structure as described in claim 1, characterized in that, The support bolt has a height adjustment range of 100mm.
3. The old bridge and culvert reinforcement support structure as described in claim 2, characterized in that, The upper column is connected to the top plate and the bottom plate by ribs, and the lower column is also connected to the top plate and the bottom plate by ribs. The ribs are evenly distributed along the circumference of the upper and lower columns.
4. The old bridge and culvert reinforcement support structure as described in claim 3, characterized in that, The screw and nut are made of 8.8 grade high-strength bolts with a diameter of 28mm. The upper column, lower column, top plate, bottom plate and rib plate are all made of Q235-B grade steel.
5. The old bridge and culvert reinforcement support structure as described in claim 3 or 4, characterized in that, The upper column is 400mm high, the clear distance between the upper and lower plates of the support bolts is 50mm to 150mm, the height of the lower column varies according to the clearance of the bridge span, and the applicable height range for the reinforcement of the support structure is 1500mm to 5000mm.