阅读说明：本技术 一种钢-混凝土桥梁梁体及其拼装施工工艺 (Steel-concrete bridge body and assembling construction process thereof ) 是由 刘立海 夏辉 朱志斌 叶浪 尤琦 王朝晨 张凯 陶煜 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种钢-混凝土桥梁梁体及其拼装施工工艺,所述梁体由多个预制的节段箱梁纵向连接而成的组合梁,所述节段箱梁包括混凝土顶板、混凝土底板、直立设置的中腹板和一对边腹板,所述中腹板和所述边腹板均为波形钢腹板,所述波形钢腹板侧边处固定有临时匹配件,相邻波形钢腹板对应的临时匹配件相互连接后对应的波形钢腹板侧边相互匹配贴合,所述边腹板倾斜一定角度从而与所述混凝土顶板和混凝土底板构成倒梯形结构,所述混凝土顶板横向两侧具有从所述倒梯形结构水平伸出的翼缘悬臂。本发明只需通过临时匹配件之间连接就能实现箱梁之间的准确定位,并进而保证箱梁之间的拼装效果,大大提高了定位的效率,同时还能保证定位的可靠性。(The invention discloses a steel-concrete bridge body and an assembling construction process thereof, wherein the bridge body is a composite beam formed by longitudinally connecting a plurality of prefabricated section box girders, each section box girder comprises a concrete top plate, a concrete bottom plate, a vertically arranged middle web plate and a pair of side web plates, the middle web plates and the side web plates are all corrugated steel web plates, temporary matching pieces are fixed at the side edges of the corrugated steel web plates, the corresponding side edges of the corrugated steel web plates after the temporary matching pieces corresponding to the adjacent corrugated steel web plates are mutually connected are mutually matched and attached, the side web plates are inclined at a certain angle so as to form an inverted trapezoidal structure with the concrete top plate and the concrete bottom plate, and flange cantilevers horizontally extending out of the inverted trapezoidal structure are arranged at the two transverse sides of the concrete top plate. According to the invention, accurate positioning between the box girders can be realized only by connecting the temporary matching pieces, and the splicing effect between the box girders is further ensured, so that the positioning efficiency is greatly improved, and the positioning reliability can be ensured.)

1. A steel-concrete bridge girder body which is characterized in that: the composite beam is characterized in that the beam body is a composite beam formed by longitudinally connecting a plurality of prefabricated section box beams, each section box beam comprises a concrete top plate (4), a concrete bottom plate (3), a middle web plate (2) vertically arranged in the middle of each section box beam and side web plates (1) symmetrically arranged on two transverse sides of the concrete bottom plate (3), the middle web plates (2) and the side web plates (1) are corrugated steel web plates, temporary matching pieces (7) are fixed on the side edges of the corrugated steel web plates, the corresponding side edges of the corrugated steel web plates after the temporary matching pieces (7) corresponding to adjacent corrugated steel web plates are mutually connected are mutually matched and attached, a top steel plate (6) is welded at the top end of each corrugated steel web plate, each top steel plate (6) is perpendicular to each corrugated steel web plate, and each side web plate (1) inclines at a certain angle so as to form an inverted trapezoidal structure with the concrete top plate (4) and the concrete bottom plate (3), and flange cantilevers (5) horizontally extending out of the inverted trapezoidal structure are arranged on two transverse sides of the concrete top plate (4).

2. The steel-concrete bridge body according to claim 1, wherein: wave form steel web bottom is equipped with a plurality of bottom preformed holes (9), be equipped with a plurality of top preformed holes on top steel sheet (6), be equipped with in concrete roof (4) and pass the top preformed hole, roof steel reinforcement framework has been buried underground in concrete roof (4), concrete bottom plate (3) are buried underground and are had a bottom plate steel reinforcement framework, including passing in bottom plate steel reinforcement framework's the perforation reinforcing bar of bottom preformed hole (9).

3. A steel-concrete bridge body according to claim 2, wherein: including the No. 1 segmental box roof beam that links to each other with No. 0 piece diaphragm wall in the segmental box roof beam, wave form steel web one side of No. 1 segmental box roof beam has the embedding portion (8) of diaphragm wall, evenly be equipped with a plurality of side preformed holes on embedding portion (8).

4. A steel-concrete bridge body according to claim 3, wherein: pass the perforation reinforcing bar of every bottom preformed hole (9) of well web (2) bottom is two horizontal logical long reinforcing bars, horizontal logical long reinforcing bar is followed respectively well web (2) both sides are passed bottom preformed hole (9), the part of passing of horizontal logical long reinforcing bar is cold with the adjacent horizontal logical long reinforcing bar and is taken and connect.

5. The steel-concrete bridge body according to claim 4, wherein: the temporary matching piece (7) is an L-shaped connecting plate, the temporary matching piece (7) is welded on the welding portion of the surface of the corrugated steel web plate and the connecting portion of the welding portion vertically, and the connecting portion is provided with a connecting hole and can be connected with the connecting portion of the corresponding temporary matching piece (7) through a positioning pin.

6. An assembling construction process of the steel-concrete bridge body according to any one of claims 1 to 5, characterized in that: comprises the following steps:

firstly, prefabricating a segment box girder;

step two, transferring and hoisting the segment box girder to a field assembling position;

step three, performing linear adjustment on the segment box girder hoisted in place;

fourthly, positioning and connecting the box girders of the adjacent sections for splicing;

in the first step, the corrugated steel web plate is pre-assembled with the adjacent corrugated steel web plate when the prefabrication processing is completed, the temporary matching pieces (7) are respectively welded to the side edges of the adjacent corrugated steel web plate after the pre-assembly, and the pre-assembled corrugated steel web plate is detached after the welding of the temporary matching pieces (7) is detected to be qualified.

7. The assembling construction process of the steel-concrete bridge body according to claim 6, wherein: in the fourth step, when the section box girders are connected in a positioning mode, the adjacent box girders are drawn together to enable the temporary matching pieces (7) on the adjacent corrugated steel webs to be correspondingly matched, positioning pins are driven into the temporary matching pieces (7) after matching to realize positioning of the section box girders, the joints of the corrugated steel webs after connection and positioning are welded and fixed, and the temporary matching pieces (7) are cut off after welding.

8. The assembling construction process of the steel-concrete bridge body according to claim 7, wherein: and prefabricating by adopting a short-line matching method in the first step, arranging a fixed end die at one end of a section box girder for positioning, arranging a poured previous section box girder at the other end of the section box girder as a matching girder section, and connecting and positioning a temporary matching piece (7) of the corrugated steel web plate, which is positioned at one side of the matching girder section, with a corresponding temporary matching piece (7) on the matching girder section through a positioning dowel.

Technical Field

The invention belongs to the field of bridges, and particularly relates to a steel-concrete bridge body and an assembling construction process thereof.

Background

At present, the corrugated steel web is widely applied to box bridges, and not only is the weight of the bridge greatly reduced, but also the structural strength of the bridge can be ensured. In the prior art, temporary prestress needs to be tensioned in the suspension splicing process, the spliced beam section is moved forwards and is tightly attached to the spliced beam section, the conditions of elevation, a central line and a matching surface of the spliced beam section are checked, then, adhesive is coated on a joint surface for glue splicing, the method adopts adhesive bonding when splicing and connecting, on one hand, a period of time is needed for waiting for the adhesive to solidify, the box beam is easy to shift in the solidification process, the bonding strength is weak, and even if positioning is carried out, the box beam after positioning is easy to move due to misoperation of a jack or hoisting equipment or external factors. On the other hand, the positioning needs more steps, the elevation and the center line are required to be positioned and detected in multiple positions during positioning, and once the dislocation adjustment is inconvenient, the assembling efficiency of the box girder is also influenced.

Disclosure of Invention

The invention aims to provide a steel-concrete bridge beam body, which aims to solve the problems that in the prior art, positioning and adjustment are inconvenient during box beam assembly, time consumption is high due to the fact that the box beam is required to be spliced through an adhesive during positioning, and positioning reliability is affected due to the fact that the box beam is easy to shift before and after the adhesive is solidified.

The steel-concrete bridge body is a combined beam formed by longitudinally connecting a plurality of prefabricated segmental box girders, the section box girder comprises a concrete top plate, a concrete bottom plate, a middle web plate vertically arranged in the middle of the section box girder and side web plates symmetrically arranged at two transverse sides of the concrete bottom plate, the middle web plate and the side web plates are all corrugated steel web plates, the side edges of the corrugated steel web plates are fixed with temporary matching pieces, the corresponding side edges of the corrugated steel web plates are matched and jointed after the temporary matching pieces corresponding to the adjacent corrugated steel web plates are connected with each other, a top steel plate is welded at the top end of the corrugated steel web plate and is perpendicular to the corrugated steel web plate, the side webs are inclined at a certain angle so as to form an inverted trapezoidal structure with the concrete top plate and the concrete bottom plate, and flange cantilevers horizontally extending out of the inverted trapezoidal structure are arranged on the two transverse sides of the concrete top plate.

Preferably, wave form steel web bottom is equipped with a plurality of bottom preformed holes, be equipped with a plurality of top preformed holes on the top steel sheet, be equipped with in the concrete roof and pass the top preformed hole, the roof steel reinforcement skeleton has been buried underground in the concrete roof, the floor steel reinforcement skeleton has been buried underground in the concrete floor, including passing in the top layer gluten of floor steel reinforcement skeleton the perforation reinforcing bar in bottom preformed hole.

Preferably, including the 1 st festival section case roof beam that links to each other with 0 # piece diaphragm wall in the festival section case roof beam, wave form steel web one side of 1 st festival section case roof beam has the embedding portion of diaphragm wall, evenly be equipped with a plurality of side preformed holes in the embedding portion.

Preferably, the perforation reinforcing bar that passes every bottom preformed hole of well web bottom is two horizontal logical long reinforcing bars, horizontal logical long reinforcing bar is followed respectively well web both sides are passed the bottom preformed hole, the portion of passing through of horizontal logical long reinforcing bar is cold lap joint with adjacent horizontal logical long reinforcing bar.

Preferably, the temporary matching piece is L-shaped connecting plate, the temporary matching piece comprises a welding portion and a connecting portion, the welding portion is welded on the surface of the corrugated steel web and the connecting portion is perpendicular to the welding portion, and the connecting portion is provided with a connecting hole and can be connected with the connecting portion of the corresponding temporary matching piece through a positioning pin.

The invention also provides an assembling construction process of the steel-concrete bridge body, which comprises the following steps:

firstly, prefabricating a segment box girder;

step two, transferring and hoisting the segment box girder to a field assembling position;

step three, performing linear adjustment on the segment box girder hoisted in place;

fourthly, positioning and connecting the box girders of the adjacent sections for splicing;

in the first step, the corrugated steel web plate is pre-assembled with the adjacent corrugated steel web plate when the prefabrication processing is completed, the temporary matching pieces are respectively welded on the side edges of the adjacent corrugated steel web plate after the pre-assembly, and the pre-assembled corrugated steel web plate is disassembled after the welding of the temporary matching pieces is detected to be qualified.

Preferably, in the fourth step, when the section box girders are connected in a positioning manner, the adjacent box girders are drawn together to enable the temporary matching pieces on the adjacent corrugated steel webs to be correspondingly matched, the matched temporary matching pieces are driven into the positioning pins to be connected so as to position the section box girders, the joints of the connected and positioned corrugated steel webs are welded and fixed, and the temporary matching pieces are cut off after welding.

Preferably, the step one is performed by adopting a short-line matching method, one end of the section box girder is provided with a fixed end die for positioning, the other end of the section box girder is provided with a poured previous section box girder as a matching girder section, and the temporary matching piece of the corrugated steel web plate positioned on one side of the matching girder section is connected and positioned with the corresponding temporary matching piece on the matching girder section through a positioning dowel.

The invention has the following advantages:

1. according to the invention, positioning connection is carried out through the corrugated steel web, the temporary matching piece is welded and fixed through pre-assembly after the corrugated steel web is processed, and the pre-assembly structure ensures the reliability of joint surface joint of the corrugated steel web after the temporary matching piece is positioned and connected. Meanwhile, when the section box girder is prefabricated, the corrugated steel web plates of the poured box girder and the corrugated steel web plates of the matched girders can be effectively assembled through the temporary matching parts, so that the assembling effect between the box girders can be ensured according to the assembling effect between the corrugated steel web plates. Therefore, when the segmental box girders are assembled on site, the segmental box girders can be accurately positioned only by connecting the temporary matching parts, the assembling effect of the box girders is further ensured, the process of detecting a plurality of positioning elements such as elevation and center lines is reduced, the positioning efficiency is greatly improved, and the positioning reliability can be ensured.

2. The positioning between the corrugated steel webs only needs to be punched into the positioning pins to connect the temporary matching pieces when assembling, the connection process is quick and simple, the problem that the adhesive needs to wait for solidification in the existing common glue assembling process is avoided, the time required for connection is greatly reduced, and the connection is immediately performed with enough connection strength after pin joint, the segment box girder is difficult to move in the connection process, and therefore the reliability of positioning connection is also ensured.

3. After the temporary matching piece is positioned, because the corrugated steel webs are also successfully assembled and positioned, adjacent corrugated steel webs after being assembled can be directly welded and fixed, so that adjacent section box girders can be quickly and effectively fixedly connected, and the adjacent box girders are not required to be pressed after being glued and assembled so as to pour a connecting gap in a limited time, therefore, the difficulty of the fixed connection between the box girders in adjacent stages after the positioning can be reduced.

Drawings

FIG. 1 is a schematic structural view of a sectional box girder according to the present invention;

FIG. 2 is a schematic structural diagram of the corrugated steel web in the invention;

FIG. 3 is a front view of the structure shown in FIG. 2;

fig. 4 is a schematic structural view of a perforated steel bar passing through a corrugated steel web.

The reference numerals in the figures are as follows: 1. side web, 2, well web, 3, concrete bottom plate, 4, concrete roof, 5, flange cantilever, 6, top steel sheet, 7, temporary matching spare, 8, embedding portion, 9, bottom preformed hole.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.

As shown in fig. 1 to 4, the present invention provides a steel-concrete bridge body, characterized in that: the beam body is a combined beam formed by longitudinally connecting a plurality of prefabricated section box beams, each section box beam comprises a concrete top plate 4, a concrete bottom plate 3, a middle web plate 2 vertically arranged in the middle of the section box beam and side web plates 1 symmetrically arranged at two transverse sides of the concrete bottom plate 3, the middle web plate 2 and the side web plates 1 are both corrugated steel web plates, the side edges of the corrugated steel web plates are fixed with temporary matching pieces 7, the corresponding side edges of the corrugated steel web plates are matched and attached after the temporary matching pieces 7 corresponding to the adjacent corrugated steel web plates are connected with each other, the top end of the corrugated steel web plate is welded with a top steel plate 6, the top steel plate 6 is perpendicular to the corrugated steel web plate, the side webs 1 are inclined at a certain angle so as to form an inverted trapezoidal structure with the concrete top plate 4 and the concrete bottom plate 3, and flange cantilevers 5 horizontally extending out of the inverted trapezoidal structure are arranged on two transverse sides of the concrete top plate 4.

Wave form steel web bottom is equipped with a plurality of bottom preformed holes 9, be equipped with a plurality of top preformed holes on the top steel sheet 6, be equipped with in the concrete roof 4 and pass the top preformed hole, roof steel reinforcement skeleton has been buried underground in the concrete roof 4, bottom plate steel reinforcement skeleton has been buried underground in the concrete bottom plate 3, including passing in bottom plate steel reinforcement skeleton's the top layer gluten the perforation reinforcing bar of bottom preformed hole 9. The top preformed hole on the top steel plate 6 is used for hoisting the corrugated steel web plate in the template to serve as a hoisting hole, and the top steel reinforcement framework can be integrally hoisted into the template after being formed by binding the jig frame and then is connected with the formwork to improve the connection strength with the concrete top plate.

The side web plate 1 is anchored and locked with lug seats on the side mold support through a first threaded pull rod penetrating through a preformed hole on the side edge of the side web plate, and the first threaded pull rod is at least two and arranged in parallel up and down. The middle web 2 and the side web 1 are oppositely pulled and anchored through a second threaded pull rod, two ends of the second threaded pull rod respectively penetrate through the middle web 2 and the side preformed holes in the side web 1 and are fixed, and at least two second threaded pull rods are arranged between the middle web 2 and the side web 1 in a crossed mode. Therefore, the section box girder used by the invention can accurately position and fix each corrugated steel web plate before pouring, and can ensure the splicing reliability among the box girders through the splicing positioning among the corrugated steel web plates.

Including the No. 1 segmental box roof beam that links to each other with No. 0 piece diaphragm wall in the segmental box roof beam, wave form steel web one side of No. 1 segmental box roof beam has the embedding portion 8 of diaphragm wall, evenly be equipped with a plurality of side preformed holes on the embedding portion 8.

The perforation reinforcing bar that passes every bottom preformed hole 9 of 2 bottoms of well web is two horizontal logical long reinforcing bars, horizontal logical long reinforcing bar is followed respectively 2 both sides of well web are passed bottom preformed hole 9, the part of passing of horizontal logical long reinforcing bar is cold with the adjacent horizontal logical long reinforcing bar and is taken and be connected.

The temporary matching piece 7 is an L-shaped connecting plate, the temporary matching piece 7 is welded on the welding portion of the surface of the corrugated steel web plate and is perpendicular to the connecting portion of the welding portion, and the connecting portion is provided with a connecting hole and can be connected with the connecting portion of the corresponding temporary matching piece 7 through a positioning pin.

The invention also provides a splicing construction process of the steel-concrete bridge body, which comprises the following steps:

firstly, prefabricating a segment box girder;

step two, transferring and hoisting the segment box girder to a field assembling position;

step three, performing linear adjustment on the segment box girder hoisted in place;

and step four, positioning and connecting the adjacent section box girders for assembling.

In the first step, the corrugated steel web plate is pre-assembled with the adjacent corrugated steel web plate when the prefabrication processing is completed, the temporary matching pieces 7 are respectively welded to the side edges of the adjacent corrugated steel web plate after the pre-assembly, and the pre-assembled corrugated steel web plate is detached after the welding of the temporary matching pieces 7 is detected to be qualified. When connecting the location through interim matching 7 like this, can effectively guarantee the concatenation effect between the wave form steel web.

And prefabricating by adopting a short-line matching method in the first step, arranging a fixed end die at one end of a section box girder for positioning, arranging a poured previous section box girder at the other end of the section box girder as a matching girder section, and connecting and positioning the temporary matching piece 7 of the corrugated steel web plate positioned on one side of the matching girder section and the corresponding temporary matching piece 7 on the matching girder section through a positioning pin. The corrugated steel webs of adjacent segmental box girders are positioned through the temporary matching pieces 7 before pouring, so that the segmental box girders can be assembled through the corrugated steel webs to ensure the positioning accuracy of box girder assembly.

In the fourth step, when the section box girders are positioned and connected, the adjacent box girders are drawn together to enable the temporary matching pieces 7 on the adjacent corrugated steel webs to be correspondingly matched, positioning pins are driven into the temporary matching pieces 7 after matching to realize positioning of the section box girders, the joints of the corrugated steel webs after connection and positioning are welded and fixed, and the temporary matching pieces 7 are cut off after welding. After 7 location connections through interim matching spare, not only the intensity of location connection is enough, can also carry out welded fastening to the corrugated steel web that has assembled immediately, has fast, and intensity is high, the good advantage of reliability.

In conclusion, when the segmental box girders are assembled on site, accurate positioning between the box girders can be realized only by connecting the temporary matching pieces 7, the process of detecting a plurality of positioning elements such as elevation and center lines is reduced, and the positioning efficiency is greatly improved. And this technology only need squeeze into the locating pin nail and connect temporary matching spare 7 can, the connection process is quick simple, has avoided gluing commonly used now and has pieced together the problem that the in-process needs to wait for the adhesive to solidify, has greatly reduced the required time of connection to have sufficient joint strength immediately after the pin joint, the section case roof beam is difficult to take place to remove in the connection process, consequently has also guaranteed the reliability of location connection.

The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.