Novel steel-concrete combined section structure

Abstract

The utility model discloses a novel steel-concrete combined section structure, which is characterized in that a group of steel frame keel arches are respectively arranged on two sides of a bridge, each steel frame keel arch comprises three steel frame arches, the three steel frame arches are connected through a net rack, two adjacent arch feet of the steel frame arches are in arc transition, and the steel-concrete combined section structure is arranged between the arch feet and a pier upright post. The reinforced concrete column shear keys are adopted as main components for transmitting loads, so that the steel frame keel arch is tightly combined with the pier top of the pier. According to the novel steel-concrete combined section structure, the steel arch frame and the pier top are tightly combined, integration of the steel arch frame and the pier is achieved, and the steel arch frame and the pier commonly bear loads transmitted by the steel arch frame.

Description

Technical Field

[0001] The utility model relates to the field of bridges, in particular to a novel steel-concrete combined section structure. Background Art

[0002] The steel-concrete joint section is a section where the inner concrete is tightly wrapped by a thin-walled steel pipe, which jointly bears the axial force, shear force and bending moment brought by all the loads on the bridge, thereby greatly improving the overall concrete's compressive strength and being able to withstand higher pressure. How to achieve a close combination of steel and concrete in the steel-concrete joint section to jointly bear the load of the bridge is the main difficulty of the existing technology, and if the steel and concrete are separated, it will be unfavorable for the transfer of loads. Summary of the invention

[0003] In view of the above defects of the prior art, the technical problem to be solved by the utility model is that the existing steel-concrete structure is unstable in stress and the joints are prone to cracking or separation. The utility model provides a new steel-concrete joint section structure, which tightly combines the steel arch frame with the top of the bridge pier, realizes the integration of the steel arch frame and the bridge pier, and jointly bears the load transmitted by the steel arch frame.

[0004] To achieve the above-mentioned purpose, the utility model provides a novel steel-concrete combined section structure, in which a group of steel frame keel arches are arranged on both sides of the bridge, the steel frame keel arches include three steel frame arches, the three steel frame arches are connected by a grid, two adjacent arch feet of the steel frame arches are transitioned by an arc, a steel-concrete combined section structure is arranged between the arch foot and the pier column, reinforced concrete column shear keys are used as the main components for transferring loads, so that the steel frame keel arches are tightly combined with the pier tops of the piers.

[0005] Furthermore, the entire bridge is provided with two sets of steel frame keel arches, which are located within the span range of 6 to 11 holes of the hollow hole bridge.

[0006] Furthermore, the steel frame arch is set as an equal-section arch, and each steel frame arch is set as a 6-span continuous arch. The two adjacent arch feet are transitioned through a circular arc, and the arch cross-section remains unchanged.

[0007] Furthermore, among the three steel frame arches of the steel frame keel arch, the outermost steel frame arch is located in a vertical plane, the plane where the second steel frame arch is located is obtained by rotating the first steel frame arch inwardly by one degree, but the arch cross-section does not rotate; the plane where the third steel frame arch is located is obtained by rotating the second steel frame arch inwardly by one degree, but the arch cross-section does not rotate.

[0008] Furthermore, three steel frame arches are arranged at the arch foot position, and the net distance between them is 0.1m.

[0009] Furthermore, the steel frame arch adopts a steel box section, the cross section of which is a parallelepiped, the top angle is located directly above, and the outer dimensions of the cross section are height×width=1.35m×1.08m.

[0010] Furthermore, the wall plate thickness of the arch foot section of the steel frame arch is set to 20 mm, and the wall plate thickness of other sections of the steel frame arch is set to 12 mm.

[0011] Furthermore, cross diaphragms are arranged inside the arch ribs of the steel frame arch, and the spacing between the cross diaphragms is set to 2m.

[0012] Furthermore, an I-type stiffening rib with a thickness of 12 mm is arranged inside the arch rib.

[0013] Furthermore, in the steel-concrete combined section structure, within the horizontal projection length of 4.0m of the arch foot, the web of the arch rib is fully extended into the concrete of the pier column by welding 20mm thick steel plates, and cross diaphragms are set at both ends of the 4.0m long section with horizontal projection, and 20mm thick steel plates are welded at the corresponding positions of the cross diaphragms and fully extended into the concrete of the pier column. The welded steel plate is the same width as the arch rib, and holes are opened on the steel plate and its stiffening plate extended into the concrete of the pier column and anchor bars are inserted to ensure a firm connection between the arch foot and the pier column.

[0014] Technical Effects

[0015] The utility model discloses a new type of steel-concrete combined section structure, which makes the steel frame keel arch and the pier top tightly combined to form a steel-concrete combined section; at the same time, holes are opened on the steel plates and stiffening plates of the steel arch frame extending into the concrete of the pier column and anchor bars are inserted to ensure that the arch foot and the pier column are firmly connected. The utility model discloses a new type of steel-concrete combined section structure, which tightly combines the steel arch frame and the pier top to realize the integration of the steel arch frame and the pier, and both bear the load transmitted by the steel arch frame.

[0016] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of consolidation of three steel frame arches and bridge piers in a preferred embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of an integrated steel-concrete combination section of a preferred embodiment of the utility model;

[0019] Figure 3 It is a schematic elevation diagram of an integrated steel-concrete combination section of a preferred embodiment of the utility model;

[0020] Figure 4 It is a plan view schematic diagram of an integrated steel-concrete combination section of a preferred embodiment of the utility model;

[0021] Figure 5 This is a layout view of a cross diaphragm integrated with a steel-concrete joint section of a preferred embodiment of the utility model;

[0022] Figure 6 It is a schematic overall cross-sectional view of an integrated steel-concrete combination section of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the following description, specific details such as specific internal procedures and techniques are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0025] like Figure 1-6 As shown, the utility model provides a new type of steel-concrete combined section structure, a group of steel frame keel arches 1 are arranged on both sides of the bridge, the steel frame keel arches include three steel frame arches 2, the three steel frame arches are connected by a grid 6, two adjacent arch feet of the steel frame arches are transitioned by an arc, a steel-concrete combined section structure 4 is arranged between the arch foot and the bridge pier column, and a reinforced concrete column shear key is used as the main component for transferring loads, so that the steel frame keel arch is tightly combined with the pier top of the bridge pier 3, the overall force performance is stable, and the joint is stable and does not crack. The bridge pier is made of reinforced concrete material, and the steel arch frame is made of steel structure material. Through holes are opened on the steel plate and its stiffening plate extending into the concrete of the bridge pier column and anchor bars are inserted, and concrete is poured inside the steel arch frame to form a steel-concrete combined section. The steel plate and its stiffening plate extending into the concrete of the bridge pier column are opened with holes and anchor bars are inserted to ensure that the arch foot and the bridge pier column are firmly connected.

[0026] The entire bridge has two sets of steel frame keel arches, located in the span range of 6 to 11.

[0027] The steel frame arch is set as an arch with equal cross-section. Each steel frame arch is set as a 6-span continuous arch. The two adjacent arch feet are transitioned through an arc, and the arch section remains unchanged. Among the three steel frame arches of the steel frame keel arch, the outermost steel frame arch is located in the vertical plane, and the plane where the second steel frame arch is located is the plane obtained by rotating the first steel frame arch inward by one degree, but the arch section does not rotate; the plane where the third steel frame arch is located is the plane obtained by rotating the second steel frame arch inward by one degree, but the arch section does not rotate. The three steel frame arches are set at the arch foot position, and the net distance between them is 0.1m.

[0028] The steel frame arch adopts a steel box section, which is a parallelepiped with the top corner located at the top. The outer dimensions of the section are height × width = 1.35m × 1.08m. The wall thickness of the arch foot section of the steel frame arch is set to 20mm, and the wall thickness of the other sections of the steel frame arch is set to 12mm. Figure 5 As shown, a transverse diaphragm 5 is arranged inside the arch rib of the steel frame arch, and the spacing between the transverse diaphragms is set to 2m. An I-shaped stiffening rib with a thickness of 12mm is arranged inside the arch rib.

[0029] like Figure 2-4 As shown in the figure, a steel-concrete combined section structure is set between the arch foot and the pier column, and the "reinforced concrete column shear key" (PBL shear key) is used as the main component for transferring loads. In the steel-concrete combined section structure, within the 4.0m horizontal projection length of the arch foot, the arch rib web is welded with a 20mm thick steel plate and fully extended into the concrete of the pier column, and a diaphragm is set at both ends of the 4.0m long horizontal projection segment. At the corresponding positions of the diaphragm, a 20mm thick steel plate is welded and fully extended into the concrete of the pier column. The welded steel plate is the same width as the arch rib. Holes are opened on the steel plate and its stiffening plate that extend into the concrete of the pier column and anchor bars are inserted to ensure that the arch foot and the pier column are firmly connected. The arch rib web is similar to the diaphragm. The diaphragm is arranged vertically with the arch ring, and the web is arranged vertically. Holes are opened on the steel plate and its stiffening plate that extend into the concrete of the pier column of the steel arch frame and anchor bars are inserted to ensure that the arch foot and the pier column are firmly connected.

[0030] The construction plan for the steel-concrete joint section is as follows: first construct the bridge pier, embed the steel plate 10 on the top of the pier, and make holes in the steel plate to pass the reinforcement. The steel arch frame is welded to the embedded steel plate, and concrete is poured inside the steel arch frame to integrate the steel-concrete joint section.

[0031] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A new type of steel-concrete combined section structure, characterized in that: A group of steel frame keel arches are arranged on both sides of the bridge. The steel frame keel arches include three steel frame arches, which are connected by a grid. Two adjacent arch feet of the steel frame arches are transitioned by an arc. A steel-concrete combined section structure is arranged between the arch feet and the pier columns. Reinforced concrete column shear keys are used as the main components for transferring loads, so that the steel frame keel arches are tightly combined with the pier tops.

2. A new type of steel-concrete combined section structure as claimed in claim 1, characterized in that: There are two groups of the steel frame keel arches in the whole bridge, which are located within the span range of holes 6 to 11 of the hole bridge.

3. A new type of steel-concrete combined section structure as claimed in claim 1, characterized in that: The steel frame arch is configured as an equal-section arch, and each steel frame arch is configured as a 6-span continuous arch. Two adjacent arch feet are transitioned through circular arcs, and the arch section remains unchanged.

4. A new type of steel-concrete joint section structure as claimed in claim 1, characterized in that: Among the three steel frame arches of the steel frame keel arch, the outermost steel frame arch is located in a vertical plane, the plane where the second steel frame arch is located is obtained by rotating the first steel frame arch inwardly by one degree, but the arch cross-section does not rotate; the plane where the third steel frame arch is located is obtained by rotating the second steel frame arch inwardly by one degree, but the arch cross-section does not rotate.

5. A new type of steel-concrete combined section structure as claimed in claim 4, characterized in that: Three steel frame arches are set at the arch foot with a net distance of 0.1m.

6. A new type of steel-concrete combined section structure as claimed in claim 1, characterized in that: The steel frame arch adopts a steel box section, the section of which is a parallelepiped, with the vertex located directly above, and the outer dimensions of the section are height×width=1.35m×1.08m.

7. A new type of steel-concrete joint section structure as claimed in claim 6, characterized in that: The wall plate thickness of the arch foot section of the steel frame arch is set to 20 mm, and the wall plate thickness of other sections of the steel frame arch is set to 12 mm.

8. A new type of steel-concrete combined section structure as claimed in claim 6, characterized in that: A transverse partition is arranged inside the arch rib of the steel frame arch, and the spacing between the transverse partitions is set to 2m.

9. A new type of steel-concrete joint section structure as claimed in claim 8, characterized in that: An I-type stiffening rib with a thickness of 12 mm is arranged inside the arch rib.

10. The new steel-concrete combined section structure according to claim 1 is characterized in that: In the steel-concrete combined section structure, within the horizontal projection length of 4.0m of the arch foot, the web of the arch rib is fully extended into the concrete of the pier column by welding 20mm thick steel plates, and cross diaphragms are set at both ends of the 4.0m long section with horizontal projection. 20mm thick steel plates are welded at the corresponding positions of the cross diaphragms and fully extended into the concrete of the pier column. The welded steel plate is the same width as the arch rib, and holes are opened on the steel plate and its stiffening plate extended into the concrete of the pier column, and anchor bars are inserted to ensure a firm connection between the arch foot and the pier column.

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