Prefabricated assembly type ultra-high performance concrete prestress I-shaped beam

Abstract

The utility model discloses a prefabricated assembly type ultra-high performance concrete prestress I-shaped beam which comprises a plurality of I-shaped beam bodies arranged in the width direction of a bridge, and a transverse partition beam is arranged on the side, close to the adjacent I-shaped beam body, of each I-shaped beam body. Connecting grooves are formed in the sides, away from the I-shaped beam bodies, of the transverse partition beams on the I-shaped beam bodies, connecting steel bars are installed at the connecting grooves of the transverse partition beams, the two ends of the connecting steel bars are installed on the two adjacent transverse partition beams respectively, and connecting beams are poured on the connecting steel bars. The connecting structure has the effect of enhancing the connecting strength between the I-shaped beams.

Description

Technical Field

[0001] The invention relates to the field of bridge engineering, and in particular to a prefabricated assembled ultra-high performance concrete prestressed I-beam. Background Art

[0002] With the continuous advancement of transportation infrastructure construction, bridges, as important structures that cross obstacles such as rivers and gullies, occupy a pivotal position in transportation routes such as roads and railways. I-beams have been widely used in bridge construction due to their unique structural form. However, during the installation of traditional I-beams, the connection strength between two adjacent I-beams often becomes a key factor restricting the overall bridge performance.

[0003] In the existing I-beam installation technology, adjacent I-beams are usually connected by welding or bolting. However, these connection methods have certain limitations in practical applications. For example, welding connections are easily affected by environmental factors, resulting in unstable welding quality; while bolt connections require a large number of bolt holes to be opened on the I-beam, which not only reduces the cross-sectional strength of the I-beam, but also increases the complexity of installation.

[0004] Therefore, how to provide an I-beam that can improve the connection strength between adjacent I-beams has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In order to strengthen the connection strength between I-beams, the present application provides a prefabricated and assembled ultra-high performance concrete prestressed I-beam.

[0006] This application provides a prefabricated ultra-high performance concrete prestressed I-beam. The following technical solutions are adopted:

[0007] The prefabricated and assembled ultra-high performance concrete prestressed I-beam comprises a plurality of I-beam bodies arranged in a row along the width direction of the road and bridge, a cross beam is arranged on the side of each I-beam body close to the adjacent I-beam body, a connecting groove is provided on the side of each cross beam on each I-beam body away from the I-beam body, connecting steel bars are installed on the cross beam at the connecting groove, and the two ends of the connecting steel bars are respectively installed on two cross beams close to each other on two adjacent I-beam bodies, and a connecting beam is cast on each connecting steel bar.

[0008] By adopting the above technical solution, connecting steel bars are installed at the connecting grooves and connecting beams are cast, thereby connecting the cross diaphragms on adjacent I-beam bodies, and then cooperating with the connecting beams, a stable connection between adjacent I-beam bodies is achieved, effectively improving the connection strength between adjacent two I-beam bodies, and further enhancing the bearing capacity and stability of the overall bridge; at the same time, such prefabricated and assembled I-beam bodies and cross diaphragms also have the advantages of simple installation and high construction efficiency, which helps to shorten the construction period and reduce the construction cost.

[0009] Preferably, the I-beam body includes an upper flange, a web, and a lower flange. The upper flange and the lower flange are respectively installed on the upper and lower sides of the web, and prestressed steel bars are embedded in both the upper flange and the lower flange.

[0010] By adopting the above technical solution, the prestressed steel bars can generate pre-compressive stress in the tensile area of the concrete, thereby offsetting part or all of the tensile stress generated by the service load, and improving the crack resistance and bearing capacity of the I-beam.

[0011] Preferably, installation grooves are formed on one side of the tops of adjacent two I-beam bodies close to each other. A precast slab is arranged at one of the installation grooves of each I-beam body. The two ends of each precast slab are respectively installed on adjacent two I-beam bodies. A number of I-beam bodies are connected to the precast slab to form a bridge support, and a cast-in-place concrete layer is laid on the bridge support.

[0012] By adopting the above technical solution, the precast slab can connect the tops of multiple I-beam bodies to form an integral body, providing a good foundation for laying the cast-in-place concrete layer; at the same time, it can eliminate the formwork installation construction of the cast-in-place concrete layer, improve the safety factor of construction, save the workload of construction personnel and shorten the construction period.

[0013] Preferably, the I-beam body includes a pair of side beams located at both ends along the arrangement direction and a number of middle beams located between the two side beams. The cross diaphragm includes a first beam body installed on the side beam and a second beam body installed on the middle beam; a connecting section is provided on one side of each side beam close to the middle beam, and the installation groove is formed in the connecting section; the side wall of the first beam body away from the side beam and the side wall of the connecting section on the same side beam away from the side beam are located in the same vertical plane.

[0014] By adopting the above technical solution, the side beams and the middle beams are distinguished, and the first beam body and the second beam body are respectively set for them, so that the bridge support can distribute the force more evenly when bearing the load; and the first beam body is closely connected to both the connecting section and the web, enhancing the connection stability of the first beam body, the side beam and the connecting section, and further improving the connection stability between the components of the bridge support.

[0015] Preferably, the side wall of the second beam body on each of the middle beams, which is far from the middle beam, and the side wall of the lower flange of the middle beam, which is far from the middle beam, are located on the same vertical plane.

[0016] Preferably, a bearing section is provided at the top of one side of each side beam far from the middle beam.

[0017] By adopting the above technical solution, a bearing section is arranged on the side beam, and the bearing section with different lengths can be used to bear the bridge top structure according to the bridge top structure with a predetermined width, thereby enhancing the bearing capacity of the bridge support.

[0018] By adopting the above technical solution, the second beam body is closely connected to the lower flange and web of the middle beam, thereby enhancing the connection stability between the second beam body and the middle beam, and further improving the connection stability between the components of the bridge support.

[0019] Preferably, the top ends of the second beam bodies on each of the middle beams are at the same height as the bottom of the installation groove on the middle beam.

[0020] By adopting the above technical solution, after the top end of the second beam body is at the same height as the bottom of the installation groove, it jointly bears the precast slab at this place with the upper flange of the middle beam, improving the bearing strength of the middle beam for the precast slab at this place, and further strengthening the structural stability after the installation of the precast slab.

[0021] Preferably, guardrails are provided at both ends of the bridge support along the bridge width direction.

[0022] By adopting the above technical solution, the guardrail can effectively prevent vehicles and pedestrians from falling from both sides of the bridge, improving the safety protection ability of the bridge.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] Installing and connecting the reinforcing bars and pouring the connecting beam realizes the stable connection between adjacent I-beam bodies, thereby effectively improving the connection strength between adjacent two I-beam bodies, and further enhancing the bearing capacity and stability of the overall bridge;

[0025] The connection section and web of the first beam body and the side beam are closely connected, enhancing the connection stability of the first beam body, side beam and connection section, and further improving the connection stability between the components of the bridge support;

[0026] The second beam body is closely connected to the lower flange and web of the middle beam, thereby enhancing the connection stability between the second beam body and the middle beam, and further improving the connection stability between the components of the bridge support. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of the I-shaped beam of the embodiment of the present application.

[0028] Figure 2 is Figure 1 An enlarged view of A in it.

[0029] Figure 3 It is a front view of the side beam of the I-beam body in the embodiment of the present application.

[0030] Figure 4 It is a front view of the middle beam of the I-beam body in the embodiment of the present application.

[0031] Explanation of reference numerals:

[0032] 1. I-beam body; 11. Upper flange; 12. Web; 13. Lower flange; 14. Prestressed steel bar; 15. Connection groove; 16. Installation groove; 17. Side beam; 171. Bearing section; 172. Connection section; 18. Middle beam; 2. Cross diaphragm; 21. Connection steel bar; 22. Connection beam; 23. First beam body; 24. Second beam body; 3. Prefabricated slab; 4. Cast-in-place concrete layer; 5. Waterproof layer; 6. Asphalt layer. Detailed implementation manners

[0033] The following further elaborates on the present application in conjunction with the attached Figures 1-4 for a more detailed description.

[0034] The embodiment of the present application discloses a prefabricated and assembled ultra-high performance concrete prestressed I-shaped beam.

[0035] Referring to Figure 1 , the prefabricated and assembled ultra-high performance concrete prestressed I-shaped beam includes a plurality of I-beam bodies 1 arranged along the bridge width direction. Each I-beam body 1 includes an upper flange 11, a web 12, and a lower flange 13. The upper flange 11 and the lower flange 13 are respectively installed on the upper and lower sides of the web 12 to form an I-shaped cross-sectional shape. Prestressed steel bars 14 are embedded in both the upper flange 11 and the lower flange 13. Through the prestressed steel bars 14, precompressive stress can be generated in the tensile area of the concrete, thereby offsetting the tensile stress generated by the service load and improving the crack resistance and load-bearing capacity of the I-beam body 1.

[0036] Referring to Figure 1 and Figure 2, on one side of each I-beam body 1 close to the adjacent I-beam body 1, a diaphragm beam 2 is provided. On the side of each diaphragm beam 2 on each I-beam body 1 away from the I-beam body 1, a number of connecting grooves 15 are opened. The number of connecting grooves 15 is arranged vertically; at each connecting groove 15 of the diaphragm beam 2, a connecting steel bar 21 is installed. The two ends of each connecting steel bar 21 are respectively installed on two adjacent diaphragm beams 2 on the adjacent two I-beam bodies 1 that are close to each other. A connecting beam 22 is cast on each connecting steel bar 21; on one side of the tops of each adjacent two I-beam bodies 1 that are close to each other, an installation groove 16 is opened. On one of the adjacent pair of I-beam bodies 1 at the installation groove 16, a precast slab 3 is provided. The two ends of the precast slab 3 are respectively installed on the adjacent two I-beam bodies 1 through the installation groove 16. After a number of I-beam bodies 1 are connected to the precast slab 3, they are used to form a bridge support, and a cast-in-place concrete layer 4 is laid on the bridge support.

[0037] After the workers successively complete the erection of the I-beam body 1 and the casting and installation of the diaphragm beam 2, first insert the connecting steel bar 21 into the connecting groove 15 of the diaphragm beams 2 at both ends, then set up a formwork on the connecting steel bar 21, and pour concrete into it to finally form the connecting beam 22, thereby preliminarily connecting each I-beam body 1. Then install the precast slab 3 at the installation groove 16 of each I-beam body 1 to connect the tops of each I-beam body 1 and form a platform. Workers can pour concrete at this place to form a cast-in-place concrete layer 4 as the bridge foundation.

[0038] Refer to Figure 3 and Figure 4 , the I-beam body 1 includes a pair of side beams 17 located at both ends along the arrangement direction and a number of middle beams 18 located between the two side beams 17. The diaphragm beam 2 includes a first beam body 23 installed on the side beam 17 and a second beam body 24 installed on the middle beam 18; on the top of one side of each side beam 17 away from the middle beam 18, a bearing section 171 is provided. Through the bearing section 171, the bridge superstructure exceeding the web 12 of the side beam 17 can be borne, thereby improving the bearing strength of the bridge support; on one side of each side beam 17 close to the middle beam 18, a connecting section 172 is provided, and the connecting section 172 is provided with an installation groove 16; the side wall of the first beam body 23 away from the side beam 17 and the side wall of the connecting section 172 on the same side beam 17 away from the side beam 17 are located in the same vertical plane; the first beam body 23 is closely attached to the upper flange 11 and the web 12 of the side beam 17, thereby increasing the contact area between the first beam body 23 and each part of the side beam 17, and further improving the connection stability between the first beam body 23 and the side beam 17.

[0039] Refer to Figure 4, the side wall of the second beam body 24 on each middle beam 18 away from the middle beam 18 and the side wall of the lower flange 13 of the middle beam 18 away from the middle beam 18 are located on the same vertical plane; the second beam body 24 is adhesively connected to the lower flange 13 of the middle beam 18 with a larger surface area, thereby improving the connection stability between the second beam body 24 and the middle beam 18, further improving the structural stability between various parts of the bridge support, and enhancing the support strength for the upper structure of the bridge.

[0040] The top ends of the second beam bodies 24 on each middle beam 18 are at the same height as the bottom of the installation groove 16 on the middle beam 18. Through this design, the second beam body 24 and the upper flange 11 of the middle beam 18 jointly bear the precast slab 3, improving the bearing strength of the second beam body 24 for the precast slab 3.

[0041] Refer to Figure 1 , after a number of I-beam bodies 1 are connected to the precast slab 3 to form a bridge support, a cast-in-place concrete layer 4 is laid on the bridge support; a waterproof layer 5 is laid on the cast-in-place concrete layer of the bridge support, and an asphalt layer 6 is laid above the waterproof layer 5; guardrails are provided at both ends of the bridge support along the bridge width direction.

[0042] The implementation principle of a prefabricated and assembled ultra-high performance concrete prestressed I-beam in an embodiment of this application is as follows: First, the erection construction of the I-beam body 1 is carried out at a predetermined position, then the precast diaphragm beam 2 is installed on each I-beam body 1, and the connecting steel bars 21 are erected and formwork is supported and poured between two adjacent diaphragm beams 2 to form a connecting beam 22, completing the connection between the adjacent I-beam bodies 1 and the diaphragm beam 2; at the same time, the precast slab 3 is erected on the adjacent I-beam bodies 1, and formwork is supported and poured on the precast slab 3 to form a cast-in-place concrete layer 4, thereby forming a bridge foundation; finally, a waterproof layer 5 and an asphalt layer 6 are laid on the cast-in-place concrete layer 4, and then the guardrails are installed to complete the construction of the I-beam.

[0043] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Prefabricated assembled ultra-high performance concrete prestressed I-beam, comprising a number of I-beam bodies (1) arranged along the bridge width direction, characterized in that, On one side of each I-beam body (1) adjacent to the adjacent I-beam body (1), a cross diaphragm (2) is provided. On the side of each cross diaphragm (2) on each I-beam body (1) away from the I-beam body (1), a connecting groove (15) is opened. At the connecting groove (15), a connecting steel bar (21) is installed on the cross diaphragm (2). The two ends of the connecting steel bar (21) are respectively installed on the two cross diaphragms (2) on the adjacent two I-beam bodies (1) close to each other, and a connecting beam (22) is cast on each connecting steel bar (21).

2. The prefabricated and assembled ultra-high performance concrete prestressed I-beam according to claim 1, characterized in that, The I-beam body (1) includes an upper flange (11), a web (12) and a lower flange (13). The upper flange (11) and the lower flange (13) are respectively installed on the upper and lower sides of the web (12). Prestressed steel bars (14) are embedded in both the upper flange (11) and the lower flange (13).

3. The prefabricated ultra-high performance concrete prestressed I-shaped beam according to claim 2, characterized in that, On one side close to each other at the top of each adjacent two I-beam bodies (1), an installation groove (16) is opened. At one of the installation grooves (16) on each I-beam body (1), a precast slab (3) is provided. The two ends of each precast slab (3) are respectively installed on the adjacent two I-beam bodies (1). After several I-beam bodies (1) are connected to the precast slab (3), they are used to form a bridge support, and a cast-in-place concrete layer (4) is laid on the bridge support.

4. The precast and assembled ultra-high performance concrete prestressed I-shaped beam according to claim 3, characterized in that, The I-beam body (1) includes a pair of side beams (17) at both ends along the arrangement direction and several middle beams (18) between the two side beams (17). The cross diaphragm (2) includes a first beam body (23) installed on the side beam (17) and a second beam body (24) installed on the middle beam (18); on one side of each side beam (17) close to the middle beam (18), a connecting section (172) is provided, and the installation groove (16) is opened in the connecting section (172); the side wall of the first beam body (23) away from the side beam (17) and the side wall of the connecting section (172) on the same side beam (17) away from the side beam (17) are located in the same vertical plane.

5. The prefabricated ultra-high performance concrete prestressed I-beam according to claim 4, characterized in that, On the top of one side of each side beam (17) away from the middle beam (18), a bearing section (171) is provided.

6. The prefabricated pre-stressed I-shaped beam made of ultra-high performance concrete according to claim 4, wherein, The side wall of the second beam body (24) on each middle beam (18) away from the middle beam (18) and the side wall of the lower flange (13) of the middle beam (18) away from the middle beam (18) are located in the same vertical plane.

7. The prefabricated and assembled ultra-high performance concrete prestressed I-shaped beam according to claim 6, wherein The top ends of each of the second beam bodies (24) on each middle beam (18) are at the same height as the bottom of the installation groove (16) on the middle beam (18).

8. The prefabricated and assembled ultra-high performance concrete prestressed I-shaped beam according to claim 6, wherein Guardrails are provided at both ends of the bridge support along the width direction of the bridge.

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