CN113802450A - Steel concrete composite beam structure and construction method - Google Patents
Steel concrete composite beam structure and construction method Download PDFInfo
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- CN113802450A CN113802450A CN202110936732.1A CN202110936732A CN113802450A CN 113802450 A CN113802450 A CN 113802450A CN 202110936732 A CN202110936732 A CN 202110936732A CN 113802450 A CN113802450 A CN 113802450A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
本发明公开了一种钢砼组合梁结构及建造方法，其中结构包括钢桁架和混凝土层；钢桁架包括多个纵向型材、多个横向型材、多个立型材和多个水平型材，多个间隔分布的纵向型材通过多个横向型材连接，多个立型材连接为一体；混凝土层包括混凝土本体和压型钢板或模板，压型钢板或模板固定在水平型材的下方；混凝土本体浇注在压型钢板或模板上以包裹水平型材。对较大跨径的结构，通过在钢桁架上增加预应力，提高结构跨径。本发明结构简单，整体结构稳固，充分利用不同材料受拉和受压性能，同时通过建造方法能够减轻结构自重，节省支模工序和模板，缩短施工周期，同时可以减小用钢量，增加稳定性和整体性，并便于后期的检查、检测及维修加固。
The invention discloses a steel concrete composite beam structure and a construction method, wherein the structure includes a steel truss and a concrete layer; the steel truss includes a plurality of longitudinal profiles, a plurality of transverse profiles, a plurality of vertical profiles and a plurality of horizontal profiles, and a plurality of spaced The distributed longitudinal profiles are connected by a plurality of transverse profiles, and a plurality of vertical profiles are connected as a whole; the concrete layer includes a concrete body and a profiled steel plate or formwork, and the profiled steel plate or formwork is fixed under the horizontal profiles; the concrete body is cast on the profiled steel plate. or formwork to wrap horizontal profiles. For structures with larger spans, the structural span can be increased by adding prestress to the steel trusses. The invention has simple structure, stable overall structure, and makes full use of the tensile and compressive properties of different materials. At the same time, the construction method can reduce the self-weight of the structure, save the formwork process and formwork, shorten the construction period, reduce the amount of steel used, and increase the stability. and integrity, and is convenient for later inspection, testing, maintenance and reinforcement.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a steel concrete composite beam structure and a construction method.
Background
Adopt the concrete girder in the bridge construction at present more, it has the easy disease that takes place, and the dead weight is big, and the concrete is cracked easily and can't continue to provide the problem of resistance after the fracture, and the weight load only that the concrete of fracture provided to rust-resistant guard action of reinforcing bar with greatly reduced, later stage restoration difficulty. And during construction, a support needs to be erected in the cast-in-place construction, the construction is complex, and if a prefabrication mode is adopted, the problem of large hoisting weight exists.
Therefore, it is an urgent need to solve the problems of the art to provide a steel concrete composite beam structure and a construction method thereof, which are simple and rapid in construction.
Disclosure of Invention
In view of the above, the present invention provides a reinforced concrete composite beam structure and a construction method thereof, so as to solve the technical problems in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a simply supported steel concrete composite beam structure comprises a steel truss and a concrete layer; the steel truss at the lower part and the concrete layer at the upper part are combined into a whole; the concrete layer wraps the horizontal section bar on the upper layer of the steel truss;
the steel truss comprises a plurality of longitudinal sectional materials, a plurality of transverse sectional materials, a plurality of vertical sectional materials and a plurality of horizontal sectional materials, the longitudinal sectional materials distributed at intervals are connected through the transverse sectional materials, and the horizontal sectional materials distributed at intervals are respectively connected with the longitudinal sectional materials into a whole through the vertical sectional materials;
the concrete layer comprises a concrete body and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the horizontal section; the concrete body is poured on the profiled steel sheet or the formwork to wrap the horizontal section of the upper layer.
By adopting the scheme, the invention has the beneficial effects that:
simple structure, overall structure is firm, make full use of material and draw and compression performance.
Further, the horizontal section bar is a steel pipe or section steel.
Further, for a structure with a large span, prestressed reinforcements or steel strands are placed inside or outside the longitudinal section of the steel truss, and then the prestressed reinforcements or the steel strands are tensioned and anchored.
Furthermore, the prestressed reinforcement and the steel strand are both in a linear structure or a parabolic structure; the linear structure is placed inside or outside the longitudinal section bar; the parabolic structure is attached to the plane formed by the longitudinal section bar and the vertical section bar, and a steel pipe steering gear is arranged at the intersection of the parabolic structure and the longitudinal section bar and the vertical section bar.
A continuous steel concrete composite beam structure is characterized in that a first concrete body is poured on the upper portion of a horizontal steel of a steel truss within the range from the end portion of a steel concrete composite beam to the beam length of 1/8-1/4, the other portion of the steel concrete composite beam structure is wrapped with a horizontal section by a second concrete body, and a transverse bridge axial through kerf joint is arranged at the pouring junction of the first concrete body and the second concrete body within the beam length range of 1/8-1/4;
the bridge comprises bridge piers, steel trusses, concrete bottom plates and concrete layers;
the upper longitudinal section and the lower transverse section form an upper horizontal section, the lower longitudinal section and the lower transverse section form a lower horizontal section, and a plurality of longitudinal sections which are distributed at intervals are connected into a whole through a plurality of transverse sections and are placed at the top of the pier; the concrete bottom plate is poured at the position, close to the pier, of the lower horizontal section;
the concrete layer comprises a first concrete body, a second concrete body and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the upper horizontal section bar; the first concrete body is poured in the middle section of the upper horizontal section bar, and the upper horizontal section bar is wrapped by the first concrete body; and the second concrete body is poured at two ends of the horizontal section bar and is arranged at the upper part of the upper horizontal section bar.
By adopting the scheme, the invention has the beneficial effects that:
it is suitable for continuous steel concrete composite beam and makes full use of the tension and compression performance of different materials.
Further, the horizontal section bar is a steel pipe or section steel.
Furthermore, for a structure with a larger span, prestressed reinforcements or steel strands are placed inside or outside the longitudinal section, and then the prestressed reinforcements or the steel strands are tensioned and anchored.
A construction method for a simply supported reinforced concrete composite beam structure comprises the following steps:
1) erecting longitudinal section bars;
2) arranging a plurality of transverse profiles between adjacent longitudinal profiles;
3) a plurality of vertical sectional materials are arranged at the upper part of the longitudinal sectional material;
4) the tops of the vertical sectional materials are connected by horizontal sectional materials which are distributed longitudinally and transversely;
5) connecting upper and lower nodes of part of adjacent vertical sectional materials by using an inclined strut sectional material;
6) arranging a profiled steel plate or a template below the horizontal section, and pouring a concrete body on the profiled steel plate or the template to form the steel-concrete composite beam;
7) and pouring a bridge deck pavement layer or paving asphalt concrete on the top of the concrete layer to serve as a bridge deck.
By adopting the scheme, the invention has the beneficial effects that:
the self-weight of the structure can be reduced, formwork supporting procedures and templates are saved, the construction period is shortened, the steel consumption can be reduced, and the stability and the integrity are improved.
A construction method for a continuous reinforced concrete composite beam structure comprises the following steps in sequence:
1) erecting longitudinal section bars;
2) arranging a plurality of transverse profiles between adjacent longitudinal profiles;
3) a plurality of vertical sectional materials are arranged at the upper part of the longitudinal sectional material;
4) the tops of the vertical sectional materials are connected by upper horizontal sectional materials which are longitudinally and transversely distributed, and lower horizontal sectional materials are arranged in the middle between the adjacent upper horizontal sectional materials;
5) connecting upper and lower nodes of part of adjacent vertical sectional materials by using an inclined strut sectional material;
6) connecting the longitudinal sectional materials on the two sides at the bridge pier;
7) pouring a first concrete body on top of the profiled steel sheet or formwork between beam ends 1/8-1/4 beam length to wrap the horizontal profile, pouring a second concrete body on top of the top longitudinal horizontal profile and the top transverse horizontal profile within the beam ends to 1/8-1/4 beam length; a transverse bridge direction through cutting seam is arranged between the first concrete body and the second concrete body;
8) and pouring concrete bottom plates in the beam length range of-1/8 beam ends of the beam bodies on two sides of the bridge pier to wrap the longitudinal section bars and connect the beam bodies on two sides of the bridge pier.
By adopting the scheme, the invention has the beneficial effects that:
the continuous steel concrete composite beam structure is suitable for a continuous steel concrete composite beam structure formed by a multi-span bridge, the dead weight of the structure can be reduced, formwork erecting procedures and templates can be saved, the construction period can be shortened, the steel consumption can be reduced, and the stability and the integrity can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a front view of a simply supported reinforced concrete composite beam without prestressed reinforcement or steel strand according to the present invention;
FIG. 2 is a side view of a simply supported reinforced concrete composite beam without prestressed reinforcement or steel strands according to the present invention;
FIG. 3 is a front view of a simply supported reinforced concrete composite beam with prestressed reinforcements or steel strands (linear structure) according to the present invention;
FIG. 4 is a side view of a simply supported reinforced concrete composite beam with prestressed reinforcements or steel strands (linear structures) according to the present invention;
FIG. 5 is a front view of a continuous reinforced concrete composite beam with prestressed reinforcements or steel strands (linear structure) according to the present invention;
FIG. 6 is a side view of a continuous reinforced concrete composite beam with prestressed reinforcement or steel strand (linear structure) according to the present invention;
FIG. 7 is a front view of a simply supported reinforced concrete composite beam provided with steel strands (parabolic structures) according to the present invention;
fig. 8 is a side view of a simply supported reinforced concrete composite beam provided with steel strands (parabolic structures) according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1-2, a simply supported steel concrete composite beam structure includes a steel truss and a concrete layer; the steel truss comprises a plurality of longitudinal sectional materials 1, a plurality of transverse sectional materials 2, a plurality of vertical sectional materials 3 and a plurality of horizontal sectional materials 4, the longitudinal sectional materials 1 distributed at intervals are connected through the transverse sectional materials 2, and the horizontal sectional materials 4 distributed at intervals are respectively connected with the longitudinal sectional materials 1 into a whole through the vertical sectional materials 3; the concrete layer comprises a concrete body 6 and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the horizontal section 4; the concrete body 6 is cast on profiled steel sheets or formwork to wrap the horizontal profile 4. The invention has simple structure and stable integral structure, and improves the tension and compression performance.
The embodiment of the invention also discloses a construction method of the simple support reinforced concrete composite beam structure, which is suitable for factory processing and field installation of the simple support reinforced concrete composite beam with the length of less than 20 meters, wherein the longitudinal section 1, the transverse section 2, the vertical section 3, the horizontal section 4 and the inclined strut section 5 are all selected to be steel pipes, and the construction method comprises the following steps:
1) planning the overall arrangement form of the steel concrete composite beam structure, estimating the number of the longitudinal sections 1 according to the bridge width, and calculating the specification of each part of the structure according to the load size to determine the specification sizes of the longitudinal sections 1, the transverse sections 2, the vertical sections 3, the horizontal sections 4, the inclined strut sections 5 and the profiled steel plates or the templates and the thickness of the concrete body 6; the size of the transverse section bar 2 is 1/5-1/2 of the specification of the longitudinal section bar 1, and the distance between the adjacent transverse section bars 2 is 3-5 m; the size of the vertical section bar 3 is 1/5-1/3 of the specification of the longitudinal section bar 1, and the distance between the adjacent vertical section bars 3 is 2-5 m; the diameter of the horizontal section 4 is 1/5-1/3 of the diameter of the longitudinal section 1;
2) erecting longitudinal sectional materials 1, and adjusting the distance between the longitudinal sectional materials 1 according to the planned position;
3) connecting the longitudinal sectional materials 1 by using a plurality of transverse sectional materials 2, wherein the distance between every two adjacent transverse sectional materials 2 is 3-5 m;
4) vertical sectional materials 3 are arranged at the upper part of the longitudinal sectional material 1, and the distance between every two adjacent vertical sectional materials 3 is 2-5 m;
5) connecting the vertical sectional materials 3 by using horizontal sectional materials 4, wherein the horizontal sectional materials 4 are distributed in a longitudinally and transversely crossed manner;
6) in the longitudinal direction, connecting the upper node and the lower node of the adjacent vertical section bars 3 by using longitudinal diagonal bracing section bars 51, wherein for the part of 1/4 beam length reaching the beam end, the longitudinal diagonal bracing section bars 51 are all laid, and the longitudinal diagonal bracing section bars 51 have the upper ends close to the beam end and the lower ends close to the midspan; in the transverse direction, connecting the upper and lower nodes of the adjacent vertical section bars 3 by using transverse diagonal bracing section bars 52, and forming a section bar framework by using the distance between the adjacent transverse diagonal bracing section bars 52 of 3-5 meters;
7) the section bar frameworks are manufactured in a transverse sectional factory, hoisted in place one by one on site and connected into a whole by connecting pieces;
8) placing a template or a profiled steel sheet below the horizontal section 4, wherein the placing position is determined according to the calculated thickness of the concrete body 6; the distance between the profiled steel sheet or the template and the horizontal section 4 is 10-20cm, and the top surface of the concrete body 6 exceeds the horizontal section by 410-35 cm;
9) directly pouring a concrete body 6 on the profiled steel plate or the template;
10) pouring a concrete bridge deck pavement layer 7;
11) and paving asphalt concrete on the concrete bridge deck pavement layer 7, wherein the thickness of the asphalt concrete is 5-10 cm.
Example 2:
as shown in fig. 3-4, a simply supported steel concrete composite beam structure includes a steel truss and a concrete layer; the steel truss comprises a plurality of longitudinal sectional materials 1, a plurality of transverse sectional materials 2, a plurality of vertical sectional materials 3 and a plurality of horizontal sectional materials 4, the longitudinal sectional materials 1 distributed at intervals are connected through the transverse sectional materials 2, and the horizontal sectional materials 4 distributed at intervals are respectively connected with the longitudinal sectional materials 1 into a whole through the vertical sectional materials 3; the concrete layer comprises a concrete body 6 and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the horizontal section 4; the concrete body 6 is cast on profiled steel sheets or formwork to wrap the horizontal profile 4. The invention has simple structure and stable integral structure, and improves the tension and compression performance.
The embodiment of the invention also discloses a construction method of the simple support reinforced concrete composite beam structure, which is suitable for factory processing and field installation of the simple support reinforced concrete composite beam with the length of more than or equal to 20 meters, wherein the longitudinal section 1, the transverse section 2, the vertical section 3, the horizontal section 4 and the inclined strut section 5 are all selected to be steel pipes, and the construction method comprises the following steps:
1) planning the overall arrangement form of the steel concrete composite beam structure, estimating the number of the longitudinal sections 1 according to the bridge width, and calculating the specification of each part of the structure according to the load size to determine the specification sizes of the longitudinal sections 1, the transverse sections 2, the vertical sections 3, the horizontal sections 4, the inclined strut sections 5 and the profiled steel plates or the templates and the thickness of the concrete body 6;
2) erecting longitudinal sectional materials 1, and adjusting the distance between the longitudinal sectional materials 1 according to the planned position;
3) connecting the longitudinal sectional materials 1 by using a plurality of transverse sectional materials 2, wherein the distance between every two adjacent transverse sectional materials 2 is 3-5 m;
4) vertical sectional materials 3 are arranged at the upper part of the longitudinal sectional material 1, and the distance between every two adjacent vertical sectional materials 3 is 2-5 m;
5) connecting the vertical sectional materials 3 by using horizontal sectional materials 4, wherein the horizontal sectional materials 4 are distributed in a longitudinally and transversely crossed manner;
6) in the longitudinal direction, connecting the upper node and the lower node of the adjacent vertical section bars 3 by using longitudinal diagonal bracing section bars 51, wherein for the part of 1/4 beam length reaching the beam end, the longitudinal diagonal bracing section bars 51 are all laid, and the longitudinal diagonal bracing section bars 51 have the upper ends close to the beam end and the lower ends close to the midspan; in the transverse direction, connecting the upper and lower nodes of the adjacent vertical section bars 3 by using transverse diagonal bracing section bars 52, and forming a section bar framework by using the distance between the adjacent transverse diagonal bracing section bars 52 of 3-5 meters;
7) the section bar frameworks are manufactured in a transverse sectional factory, hoisted in place one by one on site and connected into a whole by connecting pieces;
8) placing a template or a profiled steel sheet below the horizontal section 4, wherein the placing position is determined according to the calculated thickness of the concrete body 6;
9) directly pouring a concrete body 6 on the profiled steel plate or the template;
10) mounting prestressed reinforcements 8 or steel strands 9, wherein the number of the prestressed reinforcements 8 or the steel strands 9 is determined according to calculation, the prestressed reinforcements 8 or the steel strands 9 are all in a linear structure or a parabolic structure, the linear structure is placed inside or outside the longitudinal section bar 1, and the linear structure is preferentially adopted when the length of the beam is less than 25 m;
11) stretching and anchoring the prestressed reinforcement 8 or the steel strand 9, and performing rust prevention treatment;
12) pouring a concrete bridge deck pavement layer 7;
13) and paving asphalt concrete on the concrete bridge deck pavement layer 7, wherein the thickness of the asphalt concrete is 5-10 cm.
Example 3:
as shown in fig. 5 to 6, a continuous steel concrete composite girder structure includes a pier 10, a steel truss, a concrete bottom plate 11, and a concrete layer; the steel truss comprises a plurality of longitudinal sectional materials 1, a plurality of transverse sectional materials 2, a plurality of vertical sectional materials 3, a plurality of upper horizontal sectional materials and a plurality of lower horizontal sectional materials with the length smaller than that of the upper horizontal sectional materials, wherein the longitudinal sectional materials 1 distributed at intervals are connected into a whole through the transverse sectional materials 2 and are fixed at the top of the pier 10; the concrete bottom plate 11 is poured at the position, close to the bridge pier 10, of the plurality of longitudinal profiles 1; the upper horizontal profiles are respectively connected with the longitudinal profiles 1 into a whole through the vertical profiles 3; the lower horizontal section bar is arranged in the middle between the adjacent upper horizontal section bars; the concrete layer comprises a first concrete body, a second concrete body and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the horizontal section 4; a first concrete body is poured on the upper part of the profiled steel sheet or the formwork between the beam ends 1/8-1/4 beam length to wrap the two end positions of the horizontal section bar 4, and a second concrete body is poured on the upper parts of the horizontal section bar 4 with the longitudinal top and the horizontal section bar 4 with the transverse top within the range from the beam ends to 1/8-1/4 beam length; concrete slabs 11 are poured on the beam ends of the beams at both sides of the pier-1/8 beam length to wrap the lower longitudinal section bars and to connect the beams at both sides of the pier.
The embodiment of the invention also discloses a construction method of the continuous steel concrete composite beam structure, which is suitable for the continuous steel concrete composite beam with the length more than or equal to 20 meters, which is processed in a factory and installed on site, wherein the longitudinal section bar 1, the transverse section bar 2, the vertical section bar 3, the horizontal section bar 4 (the upper horizontal section bar and the lower horizontal section bar) and the inclined strut section bar 5 are all selected to be steel pipes, and the method comprises the following steps:
1) planning the overall arrangement form of the steel concrete composite beam structure, estimating the number of the longitudinal sections 1 according to the bridge width, and calculating the specification of each part of the structure according to the load size to determine the specification sizes of the longitudinal sections 1, the transverse sections 2, the vertical sections 3, the horizontal sections 4, the inclined strut sections 5 and profiled steel sheets or templates and the thickness of the concrete body 6 (a first concrete body and a second concrete body);
2) erecting longitudinal sectional materials 1, and adjusting the distance between the longitudinal sectional materials 1 according to the planned position;
3) connecting the longitudinal sectional materials 1 by using a plurality of transverse sectional materials 2, wherein the distance between every two adjacent transverse sectional materials 2 is 3-5 m;
4) vertical sectional materials 3 are arranged at the upper part of the longitudinal sectional material 1, and the distance between every two adjacent vertical sectional materials 3 is 2-5 m;
5) connecting the vertical sectional materials 3 by using horizontal sectional materials 4, wherein the horizontal sectional materials 4 are distributed in a longitudinally and transversely crossed manner;
6) in the longitudinal direction, connecting the upper node and the lower node of the adjacent vertical section bars 3 by using longitudinal diagonal bracing section bars 51, wherein for the part of 1/4 beam length reaching the beam end, the longitudinal diagonal bracing section bars 51 are all laid, and the longitudinal diagonal bracing section bars 51 have the upper ends close to the beam end and the lower ends close to the midspan; in the transverse direction, connecting the upper and lower nodes of the adjacent vertical section bars 3 by using transverse diagonal bracing section bars 52, and forming a section bar framework by using the distance between the adjacent transverse diagonal bracing section bars 52 of 3-5 meters;
7) the section bar frameworks are manufactured in a transverse sectional factory, hoisted in place one by one on site and connected into a whole by connecting pieces;
8) connecting the longitudinal sections of the beam bodies on two sides at the bridge pier;
9) a template or a profiled steel sheet is placed at the lower part of the horizontal section 4;
10) pouring concrete bottom plates 11 within the range of 1-5 m on the top and two sides of the pier 10 to wrap the longitudinal section 1, wherein the height is 1/4-1/8 of the height of the beam; the lower horizontal section bar and the upper horizontal section bar are welded side by side or the wall thickness of the middle part of the upper horizontal section bar is increased;
11) pouring a first concrete body on top of the profiled steel sheet or formwork between beam ends 1/8-1/4 beam length to wrap the horizontal profile 4, pouring a second concrete body on top of the top longitudinal horizontal profile and the top transverse horizontal profile within the beam ends to 1/8-1/4 beam length; pouring concrete bottom plates on the bottom plates in the beam length range of-1/8 beam ends of the beam bodies on two sides of the pier to wrap the lower longitudinal section bars and connect the beam bodies on two sides of the pier;
12) mounting prestressed reinforcements 8 or steel strands 9, wherein the number of the prestressed reinforcements 8 or the steel strands 9 is determined according to calculation, the prestressed reinforcements 8 or the steel strands 9 are all in a linear structure or a parabolic structure, the linear structure is placed inside or outside the longitudinal section bar 1, and the linear structure is preferentially adopted when the length of the beam is less than 25 m;
13) stretching and anchoring the prestressed reinforcement 8 or the steel strand 9, and performing rust prevention treatment;
14) pouring a concrete bridge deck pavement layer 7;
15) and paving asphalt concrete on the concrete bridge deck pavement layer 7, wherein the thickness of the asphalt concrete is 5-10 cm.
Example 4:
as shown in fig. 3 and 4, a simply supported steel concrete composite beam structure comprises a steel truss and a concrete layer; the steel truss comprises a plurality of longitudinal sectional materials 1, a plurality of transverse sectional materials 2, a plurality of vertical sectional materials 3 and a plurality of horizontal sectional materials 4, the longitudinal sectional materials 1 distributed at intervals are connected through the transverse sectional materials 2, and the horizontal sectional materials 4 distributed at intervals are respectively connected with the longitudinal sectional materials 1 into a whole through the vertical sectional materials 3; the concrete layer comprises a concrete body 6 and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the horizontal section 4; the concrete body 6 is cast on profiled steel sheets or formwork to wrap the horizontal profile 4. The invention has simple structure and stable integral structure, and improves the tension and compression performance.
The embodiment of the invention also discloses a construction method of the simply supported steel concrete composite beam structure, which is suitable for simply supported steel concrete composite beams which are installed on site and have the length of more than or equal to 20 meters, wherein the longitudinal section 1, the transverse section 2, the vertical section 3, the horizontal section 4 and the inclined strut section 5 are all selected to be steel pipes, and the construction method comprises the following steps:
2) planning the overall arrangement form of the steel concrete composite beam structure, estimating the number of the longitudinal sections 1 according to the bridge width, and calculating the specification of each part of the structure according to the load size to determine the specification sizes of the longitudinal sections 1, the transverse sections 2, the vertical sections 3, the horizontal sections 4, the inclined strut sections 5 and the profiled steel plates or the templates and the thickness of the concrete body 6;
2) erecting longitudinal sectional materials 1, and adjusting the distance between the longitudinal sectional materials 1 according to the planned position;
3) connecting the longitudinal sectional materials 1 by using a plurality of transverse sectional materials 2, wherein the distance between every two adjacent transverse sectional materials 2 is 3-5 m;
4) vertical sectional materials 3 are arranged at the upper part of the longitudinal sectional material 1, and the distance between every two adjacent vertical sectional materials 3 is 2-5 m;
5) connecting the vertical sectional materials 3 by using horizontal sectional materials 4, wherein the horizontal sectional materials 4 are distributed in a longitudinally and transversely crossed manner;
6) in the longitudinal direction, connecting the upper node and the lower node of the adjacent vertical section bars 3 by using longitudinal diagonal bracing section bars 51, wherein for the part of 1/4 beam length reaching the beam end, the longitudinal diagonal bracing section bars 51 are all laid, and the longitudinal diagonal bracing section bars 51 have the upper ends close to the beam end and the lower ends close to the midspan; in the transverse direction, connecting the upper and lower nodes of the adjacent vertical section bars 3 by using transverse diagonal bracing section bars 52, wherein the distance between the adjacent transverse diagonal bracing section bars 52 is 3-5 m;
7) connecting the longitudinal sections of the beam bodies on two sides at the bridge pier;
8) placing a template or a profiled steel sheet at the lower part of the horizontal section 4, wherein the placing position is determined according to the calculated thickness of the concrete body 6;
9) pouring a first concrete body on top of the profiled steel sheet or formwork between beam ends 1/8-1/4 beam length to wrap the horizontal profile 4, pouring a second concrete body on top of the top longitudinal horizontal profile and the top transverse horizontal profile within the beam ends to 1/8-1/4 beam length; pouring concrete bottom plates on the bottom plates in the beam length range of-1/8 beam ends of the beam bodies on two sides of the pier to wrap the lower longitudinal section bars and connect the beam bodies on two sides of the pier;
10) mounting prestressed reinforcements 8 or steel strands 9, wherein the number of the prestressed reinforcements 8 or the steel strands 9 is determined according to calculation, the prestressed reinforcements 8 or the steel strands 9 are all in a linear structure or a parabolic structure, the linear structure is placed inside or outside the longitudinal section bar 1, and the linear structure is preferentially adopted when the length of the beam is less than 25 m;
11) stretching and anchoring the prestressed reinforcement 8 or the steel strand 9, and performing rust prevention treatment;
12) pouring a concrete bridge deck pavement layer 7;
13) and paving asphalt concrete on the concrete bridge deck pavement layer 7, wherein the thickness of the asphalt concrete is 5-10 cm.
Example 5:
as shown in fig. 7 to 8, a continuous steel concrete composite girder structure includes a pier 10, a steel truss, a concrete bottom plate 11, and a concrete layer; the steel truss comprises a plurality of longitudinal sectional materials 1, a plurality of transverse sectional materials 2, a plurality of vertical sectional materials 3, a plurality of upper horizontal sectional materials and a plurality of lower horizontal sectional materials with the length smaller than that of the upper horizontal sectional materials, wherein the longitudinal sectional materials 1 distributed at intervals are connected into a whole through the transverse sectional materials 2 and are fixed at the top of the pier 10; the concrete bottom plate 11 is poured at the position, close to the bridge pier 10, of the plurality of longitudinal profiles 1; the upper horizontal profiles are respectively connected with the longitudinal profiles 1 into a whole through the vertical profiles 3; the lower horizontal section bar is arranged in the middle between the adjacent upper horizontal section bars; the concrete layer comprises a first concrete body, a second concrete body and a profiled steel sheet or a template, and the profiled steel sheet or the template is fixed below the upper horizontal section; the first concrete body is poured on the upper parts of the upper horizontal section bar and the lower horizontal section bar; and the second concrete body is poured on the upper part of the profiled steel sheet or the template so as to wrap the two end positions of the upper horizontal section bar. The invention is suitable for continuous steel concrete composite beams, and improves the tensile and compressive properties.
The embodiment of the invention also discloses a construction method of the continuous steel-concrete composite beam structure, which is suitable for simple-supported structural steel-concrete composite beams with the beam length of more than 50 meters, which are processed in factories and installed on site, wherein the longitudinal section bar 1, the transverse section bar 2, the vertical section bar 3, the horizontal section bar 4 (the upper horizontal section bar and the lower horizontal section bar) and the inclined strut section bar 5 are all selected to be steel pipes, and the construction method comprises the following steps:
1) planning the overall arrangement form of the steel concrete composite beam structure, estimating the number of the longitudinal sections 1 according to the bridge width, and calculating the specification of each part of the structure according to the load size to determine the specification sizes of the longitudinal sections 1, the transverse sections 2, the vertical sections 3, the horizontal sections 4, the inclined strut sections 5 and profiled steel sheets or templates and the thickness of the concrete body 6 (a first concrete body and a second concrete body);
2) erecting longitudinal sectional materials 1, and adjusting the distance between the longitudinal sectional materials 1 according to the planned position;
3) connecting the longitudinal sectional materials 1 by using a plurality of transverse sectional materials 2, wherein the distance between every two adjacent transverse sectional materials 2 is 3-5 m;
4) vertical sectional materials 3 are arranged at the upper part of the longitudinal sectional material 1, and the distance between every two adjacent vertical sectional materials 3 is 2-5 m;
5) connecting the vertical sectional materials 3 by using horizontal sectional materials 4, wherein the horizontal sectional materials 4 are distributed in a longitudinally and transversely crossed manner;
6) in the longitudinal direction, connecting the upper node and the lower node of the adjacent vertical section bars 3 by using longitudinal diagonal bracing section bars 51, wherein for the part of 1/4 beam length reaching the beam end, the longitudinal diagonal bracing section bars 51 are all laid, and the longitudinal diagonal bracing section bars 51 have the upper ends close to the beam end and the lower ends close to the midspan; in the transverse direction, connecting the upper and lower nodes of the adjacent vertical section bars 3 by using transverse diagonal bracing section bars 52, and forming a section bar framework by using the distance between the adjacent transverse diagonal bracing section bars 52 of 3-5 meters;
7) the section bar frameworks are manufactured in a transverse sectional factory, hoisted in place one by one on site and connected into a whole by connecting pieces;
8) placing a template or a profiled steel sheet below the horizontal section 4, wherein the placing position is determined according to the calculated thickness of the concrete body 6;
9) pouring concrete bottom plates 11 within the range of 1-5 m on the top and two sides of the pier 10 to wrap the longitudinal section 1, wherein the height is 1/4-1/8 of the height of the beam; the lower horizontal section bar and the upper horizontal section bar are welded side by side or the wall thickness of the middle part of the upper horizontal section bar is increased;
10) pouring a second concrete body on the profiled steel sheet or the template, and pouring a first concrete body on the lower horizontal section and the upper horizontal section or the upper horizontal section with increased wall thickness;
11) installing prestressed reinforcements 8 or steel strands 9, wherein the number of the prestressed reinforcements 8 or the steel strands 9 is determined according to calculation, and the prestressed reinforcements 8 or the steel strands 9 are both in a linear structure or a parabolic structure, and in the embodiment, the parabolic structure is adopted and is placed inside or outside the longitudinal section bar 1;
12) stretching and anchoring the steel strand 9, and performing rust prevention treatment;
13) pouring a concrete bridge deck pavement layer 7;
14) and paving asphalt concrete on the concrete bridge deck pavement layer 7, wherein the thickness of the asphalt concrete is 5-10 cm.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
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Application publication date: 20211217 |