A temporary steel bridge for connecting the roller compacted concrete dam body with the upstream and downstream bank slopes

Abstract

The utility model relates to the field of water conservancy and hydropower engineering dam construction technology, concretely relates to a kind of temporary steel bridge for connecting roller compacted concrete dam body and upstream and downstream bank slope.The steel bridge is formed by cross bar, reinforcing bar and steel plate to constitute bridge deck bearing system, and the support structure formed by vertical rod, diagonal bar, corner bar cooperates with bottom plate mechanism to provide stable support, and the connection with both sides is realized by battens, the overall structure is detachable and stable, and the temporary traffic demand of crossing dam toe is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of dam construction technology in water conservancy and hydropower projects, specifically to a temporary steel bridge for connecting roller-compacted concrete dam bodies with upstream and downstream bank slopes. Background Technology

[0002] In the construction of roller-compacted concrete dams, existing terrain is often utilized, with access roads connecting the upstream and downstream banks constructed for dump trucks to transport roller-compacted concrete. Since the upstream face is a key area for seepage prevention, temporary access roads are often constructed to meet the practical needs of dump trucks entering the dam for pouring, transferring construction machinery, transporting materials, and facilitating the movement of workers. The stability and reliability of these temporary access roads directly affect project progress and personnel safety, thus placing high demands on the structural design of the temporary bridges. Traditional temporary access roads often use simple wooden plank bridges or temporary steel structures; however, traditional structures are difficult to stably support and are prone to deformation or even collapse due to uneven load-bearing or foundation settlement, threatening traffic safety. Therefore, this utility model proposes a temporary steel bridge to solve the above problems. Summary of the Invention

[0003] To address the problem that traditional temporary passages often employ simple wooden plank bridges or temporary steel structures, which are often unstable and prone to deformation or even collapse due to uneven load distribution or foundation settlement, threatening passage safety, this utility model provides a temporary steel bridge connecting a roller-compacted concrete dam to the upstream and downstream bank slopes. This steel bridge utilizes horizontal bars, reinforcing bars, and steel plates to form a bridge deck load-bearing system. A support structure composed of vertical bars, diagonal bars, and corner bars, combined with a base plate mechanism, provides stable support. Approach plates connect to both sides, and protective bars ensure safety. The overall structure is detachable and stable, meeting the temporary passage needs across the dam toe.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A temporary steel bridge for connecting a roller-compacted concrete dam to upstream and downstream bank slopes includes two crossbars. Several crossbeam reinforcement bars are evenly and detachably fixed between the two crossbars. Steel plates are laid and installed on the crossbeam reinforcement bars. Multiple steel plates are laid and connected sequentially between adjacent steel plates. Several support mechanisms are fixedly installed on the front and rear sides of the bottom of the crossbars.

[0006] The support mechanism includes vertical rods, the top of which is fixedly connected to horizontal rods. A base plate mechanism is detachably fixed at the bottom of the vertical rods. Diagonal rods are fixedly installed between the two vertical rods. A deck plate is fixedly installed at both ends of the horizontal rods at an incline. A support block is fixedly installed at the bottom of the deck plate. The support block is fixedly connected to the vertical rods through steel blocks.

[0007] The base plate structure includes an outer concrete layer, and a reinforcing layer is fixedly installed on the inner side of the outer concrete layer. The reinforcing layer is a rectangular frame structure with a hollow interior, and the whole is a reinforced concrete structure.

[0008] First mounting blocks are fixedly installed at both ends of the preferred crossbeam reinforcement rod. The side wall of the first mounting block is provided with a first positioning hole. The first mounting block is fixedly connected to the crossbeam by a first positioning screw.

[0009] The top of the steel plate has several first positioning holes, and the steel plate is fixedly connected to the crossbeam reinforcement rod by second positioning screws; the bottom of the vertical rod is fixedly provided with a second mounting block, the top of the second mounting block is provided with a second positioning hole, and the vertical rod is fixedly connected to the base plate mechanism by a second positioning nail.

[0010] Several reinforcing rods are fixedly installed at equal intervals within the primary reinforcement layer, and several connecting rods are fixedly installed between adjacent reinforcing rods to form a grid structure; both the reinforcing rods and connecting rods are made of steel bars, and the interior of the reinforcement layer is filled with concrete, with the grid structure inside the reinforcement layer also filled with concrete.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: The two horizontal bars of this utility model are detachably fixed by evenly distributed reinforcing bars, and the steel plate is fixed to the reinforcing bars through the second positioning holes, forming a stable bridge deck load-bearing system and preventing bridge deck deformation due to uneven load distribution. The base plate mechanism of this utility model uses a concrete outer layer to wrap the reinforcing layer. The reinforcing bars and connecting rods inside the layer form a grid and are filled with concrete, significantly improving the foundation's bearing capacity and solving the problem of traditional temporary passageways collapsing due to foundation settlement. This utility model enhances the lateral stability of the support mechanism by intersecting diagonal bars between the vertical bars, combined with the detachable installation of corner bars between the horizontal and vertical bars and between the diagonal and corner bars, preventing the bridge from tilting due to external forces. The reinforcing bars of this utility model are fixed to the horizontal bars by the first mounting block, and the vertical bars are fixed to the base plate mechanism by the second mounting block. Each component can be flexibly disassembled, adjusted, or replaced. The top of the crossbar of this utility model forms a guardrail through the first guard bar and the second guard bar, which effectively prevents people or equipment from falling; the right-angled triangular support block at the bottom of the platform is fixed to the vertical bar by steel blocks to ensure that the platform is stably connected to both sides and to prevent the platform from shaking when passing through. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0013] For ease of explanation, this utility model is described in detail below with reference to specific embodiments and accompanying drawings.

[0014] Figure 1 This is the first front perspective view provided by this utility model;

[0015] Figure 2 This is the second front perspective view provided by this utility model;

[0016] Figure 3 This is a bottom-view perspective view provided by this utility model;

[0017] Figure 4 This is a side perspective view provided by this utility model;

[0018] Figure 5 This is a schematic diagram of the base plate mechanism provided by this utility model;

[0019] Figure 6 This is an enlarged schematic diagram of part A provided by this utility model;

[0020] Figure 7 This is an enlarged schematic diagram of part B provided by this utility model;

[0021] Figure 8 This is an enlarged schematic diagram of part C provided by this utility model;

[0022] Figure 9 This is an enlarged schematic diagram of part D provided by this utility model;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Laying plate; 2. Support block; 3. Steel block; 4. Base plate mechanism; 41. Outer concrete layer; 42. Reinforcement layer; 43. Reinforcing rod; 44. Connecting rod; 5. First guard rod; 6. Second guard rod; 7. Steel plate; 8. Horizontal bar; 9. First positioning hole; 10. Vertical bar; 11. Second mounting block; 12. Second positioning hole; 13. Corner bar; 14. Diagonal bar; 15. Horizontal beam reinforcement rod; 16. First positioning hole; 17. First mounting block. Detailed Implementation

[0025] The present invention will be further described in detail below through embodiments. The embodiments are only used to illustrate the present invention and do not limit the scope of the present invention.

[0026] A temporary steel bridge for connecting a roller-compacted concrete dam to upstream and downstream bank slopes includes two horizontal bars 8. Several reinforcing beams 15 are detachably and uniformly fixed between the two horizontal bars 8. Multiple steel plates 7 are laid on the reinforcing beams 15, with adjacent steel plates sequentially connected. Several support mechanisms are fixedly installed on the front and rear sides of the bottom of the horizontal bars 8. Each support mechanism includes two vertical bars 10. The top of each vertical bar 10 is fixedly connected to the horizontal bar 8, and a base plate mechanism 4 is detachably fixed to the bottom of each vertical bar 10. Diagonal braces 14 are crosswise and fixed between the two vertical bars 10. Approach plates 1 are obliquely fixed at both ends of the horizontal bars 8. Support blocks 2 are fixedly installed at the bottom of the approach plates 1, and the support blocks 2 are fixedly connected to the vertical bars 10 via steel blocks 3. The steel blocks 3 are located at the bottom of the approach plates 1 and connect the support blocks 2 and the vertical bars 10, serving a fixing and supporting function. It is connected to the support block 2 and the vertical rod 10 by welding or other fixing methods to ensure the stability and reliability of the platform 1 during use. First mounting blocks 17 are fixedly installed at both ends of the crossbeam reinforcing rod 15. First positioning holes 16 are provided on the side walls of the first mounting blocks 17, and the first mounting blocks 17 are fixedly connected to the cross rod 8 by first positioning screws. Several first positioning holes 9 are opened on the top of the steel plate 7, and the steel plate 7 is fixedly connected to the crossbeam reinforcing rod 15 by second positioning screws. Second mounting blocks 11 are fixedly installed at the bottom of the vertical rod 10, and second positioning holes 12 are provided on the top of the second mounting blocks 11. The vertical rod 10 is fixedly connected to the base plate mechanism 4 by second positioning nails. The base plate mechanism 4 includes a concrete outer layer 41, and a reinforcing layer 42 is fixedly installed on the inner side of the concrete outer layer 41. The reinforcing layer 42 is a rectangular frame structure with a hollow interior and is an overall reinforced concrete structure; the concrete outer layer 41 protects the reinforcing layer 42 and enhances its load-bearing capacity. A number of reinforcing rods 43 are fixedly installed at equal intervals within the reinforcing layer 42, and a number of connecting rods 44 are fixedly installed between adjacent reinforcing rods 43, forming a grid structure. Both the reinforcing rods 43 and the connecting rods 44 are made of steel reinforcement, and the interior of the reinforcing layer 42 is filled with concrete. The concrete filling within the grid structure of the reinforcing layer 42 further enhances its load-bearing capacity. Angle rods 13 are fixedly installed between the horizontal bars 8 and the vertical bars 10, and the ends of the diagonal bars 14 are detachably installed and fixed to the angle rods 13. The longitudinal section of the support block 2 is arranged in a right-angled triangle. A number of first protective rods 5 are evenly fixedly installed at the top of the horizontal bar 8, perpendicular to the horizontal bar 8. A number of second protective rods 6 are evenly fixedly installed between the first protective rods 5, parallel to the horizontal bar 8.

[0027] This utility model, a temporary steel bridge for connecting roller-compacted concrete dams to upstream and downstream bank slopes, has been successfully applied to the civil engineering and metal structure installation project of the upper reservoir of the Yunxiao Pumped Storage Power Station in Fujian Province.

[0028] Specific implementation method: The main load-bearing structure consists of two horizontal bars 8, serving as the main load-bearing beams. Several reinforcing bars 15 are evenly distributed between the two horizontal bars 8. The reinforcing bars 15 are detachably fixed to the horizontal bars 8 via first mounting blocks 17 and first positioning holes 16 at both ends, enhancing the overall lateral connection stability. Multiple steel plates 7 are laid on the reinforcing bars 15, with adjacent steel plates 7 connected sequentially to form the bridge deck. The steel plates 7 are fixed to the reinforcing bars 15 via first positioning holes 9 at the top and second positioning screws, ensuring a flat and stable bridge deck. Each support mechanism includes two vertical bars 10. The top of the vertical bars 10 is fixed to the horizontal bar 8, and the bottom of the vertical bars 10 is detachably fixed to the base plate mechanism 4 via second mounting blocks 11 and second positioning holes 12. Diagonal bars 14 are intersecting between the two vertical bars 10 to enhance the anti-tilting capacity of the support structure. Angle bars 13 are installed between the horizontal bars 8 and the vertical bars 10, with the ends of the diagonal bars 14 detachably installed to the angle bars 13 for further reinforcement. The base plate structure 4 serves as the foundation support. The outer layer is a concrete outer layer 41, and the inner reinforcing layer 42 is hollow and filled with concrete. Reinforcing bars 43 and connecting rods 44, evenly spaced within the layer, form a grid structure to improve load-bearing capacity. At both ends of the horizontal bar 8, inclined planks 1 are installed to connect to the ground or structure on both sides of the dam toe. Right-angled triangular support blocks 2 at the bottom of the planks 1 are fixed to the vertical bars 10 by steel blocks 3, ensuring stable support for the planks 1. Multiple first guardrails 5 are vertically installed at the top of the horizontal bar 8, and second guardrails 6 are installed parallel to each other between the first guardrails 5, forming a guardrail structure to ensure safe passage.

[0029] In summary, the steel temporary bridge consists of a bridge deck load-bearing system composed of crossbars, crossbeams, reinforcing bars, and steel plates. The support structure composed of vertical bars, diagonal bars, and corner bars, together with the bottom plate mechanism, provides stable support. The approach plate 1 connects to both sides, and the guardrails ensure safety. The overall structure is detachable and stable, meeting the temporary passage needs across the dam toe.

[0030] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A temporary steel bridge for connecting a roller-compacted concrete dam body to upstream and downstream bank slopes, comprising crossbars, characterized in that, There are two crossbars, and several crossbeam reinforcement bars are evenly and detachably fixed between the two crossbars. Steel plates are laid and installed on the crossbeam reinforcement bars. There are multiple steel plates, and adjacent steel plates are laid and connected in sequence. Several support mechanisms are fixedly installed on the front and rear sides of the bottom of the crossbar. The support mechanism includes vertical rods, the top of which is fixedly connected to horizontal rods. A base plate mechanism is detachably fixed at the bottom of the vertical rods. Diagonal rods are fixedly installed between the two vertical rods. A deck plate is fixedly installed at both ends of the horizontal rods at an incline. A support block is fixedly installed at the bottom of the deck plate. The support block is fixedly connected to the vertical rods through steel blocks. The base plate structure includes an outer concrete layer, and a reinforcing layer is fixedly installed on the inner side of the outer concrete layer. The reinforcing layer is a rectangular frame structure with a hollow interior, and the whole is a reinforced concrete structure.

2. The temporary steel bridge for connecting the roller-compacted concrete dam body and the upstream and downstream bank slopes according to claim 1, characterized in that, The two ends of the crossbeam reinforcement rod are respectively fixed with a first mounting block. The side wall of the first mounting block is provided with a first positioning hole. The first mounting block is fixedly connected to the crossbeam by a first positioning screw.

3. The temporary steel bridge for connecting the roller-compacted concrete dam body and the upstream and downstream bank slopes according to claim 2, characterized in that, The top of the steel plate has several first positioning holes, and the steel plate is fixedly connected to the crossbeam reinforcement rod by second positioning screws; the bottom of the vertical rod is fixedly provided with a second mounting block, the top of the second mounting block is provided with a second positioning hole, and the vertical rod is fixedly connected to the base plate mechanism by a second positioning nail.

4. The temporary steel bridge for connecting the roller-compacted concrete dam body and the upstream and downstream bank slopes according to claim 3, characterized in that, Several reinforcing rods are fixedly installed at equal intervals within the reinforcement layer, and several connecting rods are fixedly installed between adjacent reinforcing rods to form a grid structure; both the reinforcing rods and connecting rods are made of steel bars, and the interior of the reinforcement layer is filled with concrete, with the grid structure inside the reinforcement layer also filled with concrete.

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