WO2018223502A1 - Modular arch bridge - Google Patents
Modular arch bridge Download PDFInfo
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- WO2018223502A1 WO2018223502A1 PCT/CN2017/094008 CN2017094008W WO2018223502A1 WO 2018223502 A1 WO2018223502 A1 WO 2018223502A1 CN 2017094008 W CN2017094008 W CN 2017094008W WO 2018223502 A1 WO2018223502 A1 WO 2018223502A1
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- arch
- arch bridge
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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
- E01D4/00—Arch-type bridges
Definitions
- the present invention relates to an arch bridge, and more particularly to an upper arch bridge assembled from a steel-mixed composite structure.
- arch bridges are mainly made of reinforced concrete.
- reinforced concrete arch bridges have high construction cost, long construction period, large consumption of sand and gravel, and are not environmentally friendly.
- arch bridges that are steel arch bridges, but the steel structures of these arch bridges are trusses.
- the structure is mainly, the cost is high; and the structure of the road surface is also steel, so that the pavement layer and the steel structure are not tightly bonded, and the layer is easily cracked.
- the structure close to the road surface is steel, the disturbance is large. The pavement layer is repeatedly deformed and easily cracked.
- the assembled arch bridge of the present invention comprises: forming an arch frame by the combination of the tube and tube unit along the length and width direction of the arch bridge, and providing a backfill or truss structure between the arch frame and the bridge deck; wherein the plate and tube combination
- the unit comprises a curved corrugated plate and a pipe located in the inner groove thereof, and the pipe is filled with concrete, and the corrugated path of the curved corrugated plate is perpendicular to the width direction of the arch.
- a plurality of pipes are arranged in parallel in the inner groove of the curved corrugated plate.
- the two curved sides of the curved corrugated plate are provided with a circumferential flange, and the opposite other sides are provided with a longitudinal flange.
- the plate and tube combination unit is firstly spliced along the length direction of the arch bridge to form a single arch structure, and then the single arch structure is spliced along the width direction of the arch bridge to obtain an arch frame.
- the pipes located in the groove inside the corrugated plate are connected end to end to form a communication structure.
- the arches are continuously disposed along the length of the arch bridge to form a multi-span arch.
- a shunt tube is arranged between the arch frame and the bridge deck.
- a pedestal is provided at both ends of the arch, and the pedestal is disposed on the buttress.
- the curved corrugated plate is a curved steel corrugated plate
- the pipe is a steel pipe
- the arch frame is an arched steel frame.
- the advantages of the present invention are as follows: First, the arch bridge is formed by splicing a combination of curved corrugated plates and concrete pipes, and the advantages of the corrugated plates and the pipes are complementary, except that they have their own structural strength. , also increased the structural strength of the other side, so that the strength of the entire structure is greatly increased, resulting in a plus The effect of the second.
- the inside of the arch bridge is an arched bearing steel frame.
- the upper part of the arch has a certain height (for example, ⁇ 0.6m) of backfill material (sand, earth or gravel, etc.), which can produce tube arching effect, and has high structural strength and can reduce the waveform.
- the wall thickness is thick, the cost is saved; the cross-section bending performance is superior, and it can adapt to special working conditions such as high filling and soft foundation; the strength is high, and the strength of the whole structure will not be affected even under the static load and dynamic load frequently.
- the safety is effectively guaranteed; the installation is convenient and the construction progress is guaranteed.
- the bearing steel frame is different from the general square structure frame.
- the square frame structure can not produce the common force effect of the pipe and soil; when the backfilling is completed, the pipe and the soil are jointly subjected to the force, and the trough or peak of the concrete steel pipe and the corrugated plate Tightly pressed, the trough or peak of the corrugated plate limits the columnar instability of the concrete steel pipe.
- the concrete steel pipe limits the buckling failure of the corrugated plate in the trough or peak of the corrugated steel plate, and increases the bearing capacity of the corrugated plate.
- Figure 1 is a cross-sectional view of a curved corrugated plate of the present invention
- 2-1, 2-2 are perspective views of the curved corrugated plate of the present invention.
- FIG. 3 is a schematic structural view of an arch bridge bearing steel frame of the present invention.
- Figure 4 is a schematic structural view of an arch bridge of the present invention.
- Figure 5 is an enlarged view of point A in Figure 4.
- FIG. 6 is a schematic structural view of a continuous multi-arch bridge according to the present invention.
- Figure 7 is an experimental state diagram of an arch bridge of the present invention.
- Fig. 8 is an experimental state diagram of an arch bridge carrying steel frame of the present invention.
- the plate and tube assembly unit of the present invention is provided with a pipe 3 in the inner groove 2 of the curved corrugated plate 1, where the curved corrugated plate 1 is preferably corrugated steel plate.
- the pipe 3 is preferably a steel pipe, and the pipe 3 may be disposed in the groove continuously or at intervals.
- the shape of the groove may be in various forms; the steel pipe may be in close contact with the arc groove inside the corrugated steel plate, when there are multiple steel pipes The steel pipes are arranged in parallel.
- the inner wall of the groove 2 has the same curvature as the tube 3 which is in contact with it, and the concrete 3 is filled in the pipe 3.
- the longitudinal flanges 101 are provided on both sides perpendicular to the corrugation direction of the curved corrugated plate 1, and the circumferential sides of the arcuate sides are provided with circumferential flanges 102, the curvature of the circumferential flanges 102 and the curved corrugated plates 1 The curvature is consistent.
- the corrugation direction of the curved corrugated plate 1 is perpendicular to the width direction of the arch bridge, where the width direction of the arch bridge refers to the direction perpendicular to the span direction of the arch bridge in FIG.
- FIG. 3 is a schematic structural view of an arch-shaped bearing steel frame, wherein the plate-and-tube combination unit is first spliced along the length direction of the arch bridge to form a single arch structure 501, and then the single-arch structure 501 is spliced along the width direction of the arch bridge to obtain an arch frame 5 , that is, the arched bearing steel frame.
- the longitudinal flanges 101 in the adjacent single steel frame structure are staggered from each other.
- the splicing manner of the arch-shaped bearing steel frame is not limited to the above, and the curved corrugated plate 1 can be spliced first along the width direction of the arch bridge, and then along Splicing in the length direction.
- FIG. Fig. 5 is a partially enlarged view showing the connection of the adjacent curved corrugated plates 1 when the curved corrugated plates 1 are spliced along the length of the arch bridge.
- the corrugated plates are closely attached to the pipes 3 to obtain a combined structure, and the pipes 3 are filled with concrete 4.
- the arch-shaped bearing steel frame is continuously arranged along the length of the arch bridge to form a multi-span steel frame, which not only can improve the bearing performance of the arch bridge, but also can realize the arch bridge on the wider river surface.
- a backfill soil 6 or truss structure is arranged between the arch bearing steel frame and the bridge deck, wherein the backfill soil 6 has a thickness of ⁇ 0.6 m, and the backfill material may be sand, earth or gravel arch bearing steel frame and surrounding backfilling Soil 6 produces a common force effect on the pipe and soil, and the structural strength is large.
- the backfill 6 can also be replaced by a truss structure.
- one or more shunt pipes 7 are arranged between the single-span arch bridge structures to reduce the impact pressure of the water flow on the side of the arch bridge to protect the stability and safety of the arch bridge structure.
- the curved corrugated plate 1 (waveform 380x140mm, wall thickness 5mm) is used as the test piece, and the pressure sensor 14 is mounted on the surface of the test piece, and the two ends of the test piece are connected to the concrete base 9 through the support plate and the bolt, which
- the reinforcing bars 10 are disposed laterally between the concrete bases 9, and the vertical flat steel plates 11 are disposed opposite to both sides of the corrugated plates.
- the bottom of the flat steel plates 11 is disposed on the concrete base 9, and the top portion passes through two upper and lower parallel high-strength steel plates.
- a hydraulic cylinder 13 is arranged between the two steel profiles, and sand 17 is filled in the space surrounding the high-strength steel 12, the test piece and the flat steel plate 11 on both sides as a backfill material to ensure a certain thickness of the backfill layer.
- the flat steel plate 11 on both sides, the high-strength steel 12 at the top and the steel 10 at the bottom enclose the test piece into a frame structure, which is a soil pit outside.
- the concrete steel pipe (outer diameter ⁇ 140mm, wall thickness 5mm) is used as the test piece, and the bending curvature is the same as the arc of the curved corrugated plate, and the two ends are disposed on the concrete base 9.
- a 16 mm thick curved steel plate 16 is arranged between the concrete steel pipe and the surrounding sand (the function of the curved steel plate is to block the sand and not participate in the stress of the test piece), the curved steel plate 16 is a plurality of pieces stacked, when stacked, there is a gap 18 between the plates, which can be mutually displaced, as shown in FIG.
- the maximum stress and the load are approximately linear. It can be deduced that if the corrugated steel plate of Q345 material is used and the material yield is 345Mpa, the maximum load can be 341Kpa under such specifications and section size, and the equivalent fill height is 17 Meter.
- the maximum stress and the load are approximately linear. It can be concluded that if the steel tube is made of Q235, the material yield is 235Mpa, the concrete is C40, and the material yield is 40Mpa. The maximum load can be accepted under such specifications and section size. 678Kpa, the equivalent fill is 34 meters.
- the maximum stress and load are approximately linear. It can be deduced that if the steel plate with Q345 material is used, the material yields to 345Mpa, the maximum load can be 1246Kpa under such specifications and section size, and the equivalent fill height is 62. Meter.
- the maximum load of the corrugated steel pipe is 341Kpa; the maximum load of the concrete pipe is 678Kpa; the maximum load of the plate and pipe structure is 1246Kpa.
- the composite structure of the tube and tube is 3.65 times of the load of the single corrugated steel tube; the combined structure of the tube and tube is 1.84 times of the load of the single concrete steel tube; the combined structure of the tube and tube is the sum of the loads of the two separate corrugated steel tubes + individual concrete steel tubes. 1.22 times.
- the bearing capacity of the curved corrugated plate and the curved concrete pipe is the bearing capacity of the curved corrugated steel plate and the curved concrete steel pipe. And 1.23 to 1.4 times.
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Abstract
A modular arch bridge, comprising an arch frame (5) formed and assembled by means of panel-and-tube assembly units joined in length and width directions of the arch bridge. Backfill (6) or a girder structure is provided between the arch frame (5) and a bridge deck. The panel-and-tube assembly units comprise a curved corrugated panel (1) and tubes (3) arranged in recesses thereof on an inner side, concrete (4) is filled in the tubes (3), and a direction of ribs of the curved corrugated panel (1) is perpendicular to the width direction of the arch bridge. The arch bridge is formed by assembling the panel-and-tube assembly structures, and the combination of the curved corrugated panels (1) and tubes (3) significantly enhances the strength of the overall structure. The arched support steel frame is in an interior of the arch bridge, and the backfill is provided on an upper portion thereof, thus creating a tube-related arching effect, providing superior sectional warping resistance, and ensuring safety of pipes.
Description
本发明涉及一种拱桥,尤其涉及一种由钢混组合结构装配而成的上承式拱桥。The present invention relates to an arch bridge, and more particularly to an upper arch bridge assembled from a steel-mixed composite structure.
目前,大部分中小型拱桥以钢筋混凝土为主,然而钢筋混凝土拱桥造价高、施工周期长、砂石消耗大、不利环保;也有较少部分拱桥是钢结构拱桥,但这些拱桥的钢结构以桁架结构为主,造价较高;而且路面的结构也是钢质的,致使路面层与钢结构紧贴结合不牢,易脱层开裂;另外,紧贴路面的结构为钢质时,扰度大,路面层反复变形大,易开裂。At present, most small and medium-sized arch bridges are mainly made of reinforced concrete. However, reinforced concrete arch bridges have high construction cost, long construction period, large consumption of sand and gravel, and are not environmentally friendly. There are also some arch bridges that are steel arch bridges, but the steel structures of these arch bridges are trusses. The structure is mainly, the cost is high; and the structure of the road surface is also steel, so that the pavement layer and the steel structure are not tightly bonded, and the layer is easily cracked. In addition, when the structure close to the road surface is steel, the disturbance is large. The pavement layer is repeatedly deformed and easily cracked.
因此,亟待解决上述技术难题。Therefore, it is urgent to solve the above technical problems.
发明内容Summary of the invention
发明目的:本发明的目的是提供一种结构稳定、性能优良、节能环保的装配式拱桥。OBJECT OF THE INVENTION: It is an object of the present invention to provide an assembled arch bridge which is structurally stable, excellent in performance, and energy-saving and environmentally friendly.
技术方案:本发明的装配式拱桥,包括由板管组合单元沿拱桥长度和宽度方向拼接形成拱架,在拱架与桥面之间设有回填土或桁架结构;其中,所述板管组合单元包括弧形波纹板和位于其内侧凹槽内的管材,并在管材内填充混凝土,弧形波纹板的波纹纹路方向与拱桥的宽度方向相垂直。Technical solution: the assembled arch bridge of the present invention comprises: forming an arch frame by the combination of the tube and tube unit along the length and width direction of the arch bridge, and providing a backfill or truss structure between the arch frame and the bridge deck; wherein the plate and tube combination The unit comprises a curved corrugated plate and a pipe located in the inner groove thereof, and the pipe is filled with concrete, and the corrugated path of the curved corrugated plate is perpendicular to the width direction of the arch.
其中,所述板管组合单元中,弧形波纹板内侧凹槽内平行设置若干管材。Wherein, in the plate and tube combination unit, a plurality of pipes are arranged in parallel in the inner groove of the curved corrugated plate.
所述板管组合单元中,所述弧形波纹板的两个弧形侧面设置周向法兰,相对的另外两侧设置纵向法兰。In the plate tube assembly unit, the two curved sides of the curved corrugated plate are provided with a circumferential flange, and the opposite other sides are provided with a longitudinal flange.
所述板管组合单元先沿拱桥的长度方向拼接形成单拱架结构,再将该单拱架结构沿拱桥的宽度方向拼接得到拱架。其中,当板管组合单元沿拱桥的长度方向拼接时,位于波纹板内侧凹槽内的管材首尾相接形成连通结构。The plate and tube combination unit is firstly spliced along the length direction of the arch bridge to form a single arch structure, and then the single arch structure is spliced along the width direction of the arch bridge to obtain an arch frame. Wherein, when the plate and tube combination unit is spliced along the length direction of the arch bridge, the pipes located in the groove inside the corrugated plate are connected end to end to form a communication structure.
所述拱架沿拱桥的长度方向连续设置形成多跨拱架。拱架与桥面之间设有分流管。拱架的两端设有基座,该基座设置在支墩上。弧形波纹板为弧形钢波纹板,管材为钢管,拱架为拱形钢架。The arches are continuously disposed along the length of the arch bridge to form a multi-span arch. A shunt tube is arranged between the arch frame and the bridge deck. A pedestal is provided at both ends of the arch, and the pedestal is disposed on the buttress. The curved corrugated plate is a curved steel corrugated plate, the pipe is a steel pipe, and the arch frame is an arched steel frame.
有益效果:与现有技术相比,本发明的优点体现在:首先,拱桥采用弧形波形板加混凝土管材的组合结构拼接而成,波纹板和管材两者优势互补,除了具备自身的结构强度,还分别增加了对方的结构强度,使得整个结构的强度大大增加,产生了一加一大
于二的效果。其次,拱桥内部是拱形承载钢架,其上部有一定高度(例如,≥0.6m)的回填物质(沙、土或碎石等),能产生管拱效应,结构强度大,可以减小波形板壁厚,节省造价;截面抗弯性能优越,能够适应高填方、软地基等特殊工况;强度高,即使在静载及动载频繁作用下,整个结构的强度也不会受影响,管道的安全性得到有效的保证;安装便捷,施工进度有保证。最后,该承载钢架与一般的方形结构框架不同,方形框架结构不能产生管土共同受力效应;当回填施工完毕后,管土共同受力作用形成,则混凝土钢管与波形板的波谷或波峰紧密压合,波形板的波谷或波峰限制了混凝土钢管的柱状失稳,同时混凝土钢管在波形钢板的波谷或波峰内,也限制了波形板的屈曲破坏,增加了波形板的承载能力。Advantageous Effects: Compared with the prior art, the advantages of the present invention are as follows: First, the arch bridge is formed by splicing a combination of curved corrugated plates and concrete pipes, and the advantages of the corrugated plates and the pipes are complementary, except that they have their own structural strength. , also increased the structural strength of the other side, so that the strength of the entire structure is greatly increased, resulting in a plus
The effect of the second. Secondly, the inside of the arch bridge is an arched bearing steel frame. The upper part of the arch has a certain height (for example, ≥0.6m) of backfill material (sand, earth or gravel, etc.), which can produce tube arching effect, and has high structural strength and can reduce the waveform. The wall thickness is thick, the cost is saved; the cross-section bending performance is superior, and it can adapt to special working conditions such as high filling and soft foundation; the strength is high, and the strength of the whole structure will not be affected even under the static load and dynamic load frequently. The safety is effectively guaranteed; the installation is convenient and the construction progress is guaranteed. Finally, the bearing steel frame is different from the general square structure frame. The square frame structure can not produce the common force effect of the pipe and soil; when the backfilling is completed, the pipe and the soil are jointly subjected to the force, and the trough or peak of the concrete steel pipe and the corrugated plate Tightly pressed, the trough or peak of the corrugated plate limits the columnar instability of the concrete steel pipe. At the same time, the concrete steel pipe limits the buckling failure of the corrugated plate in the trough or peak of the corrugated steel plate, and increases the bearing capacity of the corrugated plate.
图1为本发明弧形波纹板的截面图;Figure 1 is a cross-sectional view of a curved corrugated plate of the present invention;
图2-1、2-2为本发明弧形波纹板的立体图;2-1, 2-2 are perspective views of the curved corrugated plate of the present invention;
图3为本发明拱桥承载钢架的结构示意图;3 is a schematic structural view of an arch bridge bearing steel frame of the present invention;
图4为本发明拱桥的结构示意图;Figure 4 is a schematic structural view of an arch bridge of the present invention;
图5为图4中A点的放大图;Figure 5 is an enlarged view of point A in Figure 4;
图6为本发明连续多跨拱桥的结构示意图;6 is a schematic structural view of a continuous multi-arch bridge according to the present invention;
图7为本发明拱桥的实验状态图;Figure 7 is an experimental state diagram of an arch bridge of the present invention;
图8为本发明拱桥承载钢架的实验状态图。Fig. 8 is an experimental state diagram of an arch bridge carrying steel frame of the present invention.
下面结合附图对本发明的技术方案作进一步说明。The technical solution of the present invention will be further described below with reference to the accompanying drawings.
如图1、图2-1和图2-2所示,本发明的板管组合单元是在弧形波纹板1的内侧凹槽2内设管材3,这里的弧形波纹板1优选波纹钢板,管材3优选钢管,管材3可以连续或间隔设置于凹槽内,凹槽的形状可以为多种形式;钢管可以紧贴在该波形钢板内侧的弧形凹槽内,当有多根钢管时,钢管平行排列。凹槽2的内壁弧度与相接触的管材3的弧度相同,并在管材3内填充混凝土4。为了便于后续拼装,与弧形波纹板1的波纹纹路方向垂直的两侧设纵向法兰101,另外两侧即弧形侧面设周向法兰102,该周向法兰102的弧度与弧形波纹板1的弯曲弧度一致。为了提高板管组合单元的优良性能,弧形波纹板1的波纹纹路方向与拱桥的宽度方向相垂直,这里拱桥的宽度方向指与图6中拱桥的跨度方向相垂直的方向。
As shown in FIG. 1, FIG. 2-1 and FIG. 2-2, the plate and tube assembly unit of the present invention is provided with a pipe 3 in the inner groove 2 of the curved corrugated plate 1, where the curved corrugated plate 1 is preferably corrugated steel plate. The pipe 3 is preferably a steel pipe, and the pipe 3 may be disposed in the groove continuously or at intervals. The shape of the groove may be in various forms; the steel pipe may be in close contact with the arc groove inside the corrugated steel plate, when there are multiple steel pipes The steel pipes are arranged in parallel. The inner wall of the groove 2 has the same curvature as the tube 3 which is in contact with it, and the concrete 3 is filled in the pipe 3. In order to facilitate the subsequent assembly, the longitudinal flanges 101 are provided on both sides perpendicular to the corrugation direction of the curved corrugated plate 1, and the circumferential sides of the arcuate sides are provided with circumferential flanges 102, the curvature of the circumferential flanges 102 and the curved corrugated plates 1 The curvature is consistent. In order to improve the excellent performance of the plate and tube combination unit, the corrugation direction of the curved corrugated plate 1 is perpendicular to the width direction of the arch bridge, where the width direction of the arch bridge refers to the direction perpendicular to the span direction of the arch bridge in FIG.
图3为拱形承载钢架的结构示意图,其中将板管组合单元先沿拱桥的长度方向拼接形成单拱架结构501,再将该单拱架结构501沿拱桥的宽度方向拼接得到拱架5,也就是拱形承载钢架。其中,相邻的单钢架结构中的纵向法兰101相互错开,当然,拱形承载钢架的拼接方式也不限于上述,可将弧形波纹板1先沿拱桥宽度方向拼接,然后再沿长度方向拼接。同时,拱形承载钢架两端设有基座104,该基座104置于支墩8上,如图4所示。图5为弧形波纹板1沿拱桥长度拼接时,相邻弧形波纹板1连接的局部放大图,图中,波纹板与管材3紧密贴合得到组合结构,管材3内填充混凝土4。3 is a schematic structural view of an arch-shaped bearing steel frame, wherein the plate-and-tube combination unit is first spliced along the length direction of the arch bridge to form a single arch structure 501, and then the single-arch structure 501 is spliced along the width direction of the arch bridge to obtain an arch frame 5 , that is, the arched bearing steel frame. Wherein, the longitudinal flanges 101 in the adjacent single steel frame structure are staggered from each other. Of course, the splicing manner of the arch-shaped bearing steel frame is not limited to the above, and the curved corrugated plate 1 can be spliced first along the width direction of the arch bridge, and then along Splicing in the length direction. At the same time, the base of the arched bearing steel frame is provided with a base 104, which is placed on the buttress 8, as shown in FIG. Fig. 5 is a partially enlarged view showing the connection of the adjacent curved corrugated plates 1 when the curved corrugated plates 1 are spliced along the length of the arch bridge. In the figure, the corrugated plates are closely attached to the pipes 3 to obtain a combined structure, and the pipes 3 are filled with concrete 4.
如图6所示,拱形承载钢架沿拱桥长度方向连续设置形成多跨钢架,不仅能提高拱桥的承载性能,还能实现在较宽的河面上制造拱桥。在拱形承载钢架与桥面之间设有回填土6或桁架结构,其中,回填土6的厚度≥0.6m,回填物质可以为沙、土或碎石拱形承载钢架与周边的回填土6产生管土共同受力效应,结构强度大。当然,回填土6也可以替换为桁架结构。对于多跨连续结构,在发生洪峰时,为了便于泄洪,各单跨拱桥结构间布设一道或多道分流管7,减小水流对拱桥侧面的冲击压力,保护拱桥结构的稳定和安全。As shown in Fig. 6, the arch-shaped bearing steel frame is continuously arranged along the length of the arch bridge to form a multi-span steel frame, which not only can improve the bearing performance of the arch bridge, but also can realize the arch bridge on the wider river surface. A backfill soil 6 or truss structure is arranged between the arch bearing steel frame and the bridge deck, wherein the backfill soil 6 has a thickness of ≥0.6 m, and the backfill material may be sand, earth or gravel arch bearing steel frame and surrounding backfilling Soil 6 produces a common force effect on the pipe and soil, and the structural strength is large. Of course, the backfill 6 can also be replaced by a truss structure. For multi-span continuous structures, in order to facilitate flood discharge, one or more shunt pipes 7 are arranged between the single-span arch bridge structures to reduce the impact pressure of the water flow on the side of the arch bridge to protect the stability and safety of the arch bridge structure.
弧形波纹板、混凝土钢管及钢混组合结构弧形波纹板的实验报告Experimental report on curved corrugated plate, concrete steel pipe and steel-concrete composite curved corrugated plate
(一)实验目的:测试单独的弧形波纹板、单独的混凝土钢管及钢混组合结构弧形波纹板的承载能力。(I) Experimental purpose: To test the bearing capacity of individual curved corrugated plates, individual concrete steel pipes and steel-corrugated composite curved corrugated plates.
(二)实验步骤:(2) Experimental steps:
1、在地面挖长度为5m、宽度为2.5m、深度为1.5m的土坑槽15,在其中布设实验材料及设备,如图7所示。1. Excavate the pit hopper 15 with a length of 5m, a width of 2.5m and a depth of 1.5m on the ground, and lay out experimental materials and equipment in it, as shown in Figure 7.
2、以弧形波纹板1(波形380x140mm,壁厚5mm)作为试验件,在试验件的表面安装压力传感器14,试验件的两端通过支座钢板和螺栓连接在混凝土基座9上,该混凝土基座9之间横向设置钢筋10,同时波纹板两侧对置设有竖直的平钢板11,平钢板11的底部设于混凝土基座9上,顶部通过上下两个平行的高强度型钢12连接,在这两个型钢之间设置液压油缸13,在位于下方的高强度型钢12、试验件与两侧的平钢板11围城的空间里填充沙子17作为回填材质,保证一定厚度的回填层,同时,两侧的平钢板11、位于顶部的高强度型钢12和位于底部的钢筋10将试验件围成框架结构,该框架结构外面为土坑。布设完成后,启动液压油缸13,缓慢加压,直至试验件破坏,读取并记录压力传感器的最大数值。
2. The curved corrugated plate 1 (waveform 380x140mm, wall thickness 5mm) is used as the test piece, and the pressure sensor 14 is mounted on the surface of the test piece, and the two ends of the test piece are connected to the concrete base 9 through the support plate and the bolt, which The reinforcing bars 10 are disposed laterally between the concrete bases 9, and the vertical flat steel plates 11 are disposed opposite to both sides of the corrugated plates. The bottom of the flat steel plates 11 is disposed on the concrete base 9, and the top portion passes through two upper and lower parallel high-strength steel plates. 12 connection, a hydraulic cylinder 13 is arranged between the two steel profiles, and sand 17 is filled in the space surrounding the high-strength steel 12, the test piece and the flat steel plate 11 on both sides as a backfill material to ensure a certain thickness of the backfill layer. At the same time, the flat steel plate 11 on both sides, the high-strength steel 12 at the top and the steel 10 at the bottom enclose the test piece into a frame structure, which is a soil pit outside. After the layout is completed, the hydraulic cylinder 13 is started and slowly pressurized until the test piece is broken, and the maximum value of the pressure sensor is read and recorded.
3、以混凝土钢管(外径φ140mm,壁厚5mm)作为试验件,其弯曲弧度与弧形波纹板的弧度一致,其两端设置在混凝土基座9上。为保证混凝土钢管受力数据的有效性,在混凝土钢管与周边沙土之间设有16mm厚的弧形钢板16(弧形钢板的作用是挡沙,不参与试件的受力),弧形钢板16为多块拼叠而成,拼叠时,板间留有间隙18,可相互错动,如图8所示。其它与弧形波纹板作为试验件的布置方式相同,图8中未全部示出。布设完成后,启动液压油缸13,缓慢加压,直至试验件破坏,读取并记录压力传感器的最大数值。3. The concrete steel pipe (outer diameter φ140mm, wall thickness 5mm) is used as the test piece, and the bending curvature is the same as the arc of the curved corrugated plate, and the two ends are disposed on the concrete base 9. In order to ensure the validity of the force data of the concrete steel pipe, a 16 mm thick curved steel plate 16 is arranged between the concrete steel pipe and the surrounding sand (the function of the curved steel plate is to block the sand and not participate in the stress of the test piece), the curved steel plate 16 is a plurality of pieces stacked, when stacked, there is a gap 18 between the plates, which can be mutually displaced, as shown in FIG. Other arrangements are the same as the curved corrugated plates as test pieces, not all of which are shown in FIG. After the layout is completed, the hydraulic cylinder 13 is started and slowly pressurized until the test piece is broken, and the maximum value of the pressure sensor is read and recorded.
4、以上述相同规格的波形钢板与混凝土钢管的组合结构作为试验件,重复上述实验,读取并记录压力传感器的最大数值。4. Repeat the above experiment with the combination of the corrugated steel plate and the concrete steel pipe of the same specification as above, and read and record the maximum value of the pressure sensor.
5、更换波形钢板与混凝土钢管的规格参数(波距、波高、壁厚以及钢管直径等参数),重复上述实验,得到多组相应规格参数所对应得压力数据。5. Replace the specifications (wavelength, wave height, wall thickness and diameter of the steel pipe) of the corrugated steel plate and the concrete steel pipe. Repeat the above experiment to obtain the pressure data corresponding to the corresponding specifications of the multiple sets.
(三)有限元分析(3) Finite element analysis
1、针对560x200x5mm(单独波形钢板)1, for 560x200x5mm (individual corrugated steel plate)
油缸施加荷载KpaCylinder load Kpa | 传感器-最大应力值MpaSensor - Maximum stress value Mpa |
60(等价2米填土)60 (equivalent to 2 m fill) | 60.660.6 |
90(等价4米填土)90 (equivalent to 4 m fill) | 90.890.8 |
120(等价6米填土)120 (equivalent to 6 meters fill) | 121.1121.1 |
160(等价8米填土)160 (equivalent to 8 m fill) | 161.4161.4 |
200(等价10米填土)200 (equivalent to 10 m fill) | 201.8201.8 |
由上表数据,最大应力与荷载近似线性关系,可推出若采用Q345材质的波形钢板,材料屈服为345Mpa,则在此种规格参数以及截面尺寸下最大能承受荷载341Kpa,折合填土高度为17米。From the data in the above table, the maximum stress and the load are approximately linear. It can be deduced that if the corrugated steel plate of Q345 material is used and the material yield is 345Mpa, the maximum load can be 341Kpa under such specifications and section size, and the equivalent fill height is 17 Meter.
油缸施加荷载KpaCylinder load Kpa | 传感器-最大应力值MpaSensor - Maximum stress value Mpa |
60(等价2米填土)60 (equivalent to 2 m fill) | 3.613.61 |
90(等价4米填土)90 (equivalent to 4 m fill) | 5.405.40 |
120(等价6米填土)120 (equivalent to 6 meters fill) | 7.197.19 |
160(等价8米填土)160 (equivalent to 8 m fill) | 9.599.59 |
200(等价10米填土)200 (equivalent to 10 m fill) | 11.811.8 |
由上表数据,最大应力与荷载近似线性关系,可推出若采用Q235材质的钢管,材料屈服为235Mpa,混凝土采用C40,材料屈服为40Mpa,则在此种规格参数以及截面尺寸下最大能承受荷载678Kpa,折合填土为34米。From the data in the above table, the maximum stress and the load are approximately linear. It can be concluded that if the steel tube is made of Q235, the material yield is 235Mpa, the concrete is C40, and the material yield is 40Mpa. The maximum load can be accepted under such specifications and section size. 678Kpa, the equivalent fill is 34 meters.
油缸施加荷载KpaCylinder load Kpa | 传感器-最大应力值MpaSensor - Maximum stress value Mpa |
60(等价2米填土)60 (equivalent to 2 m fill) | 16.616.6 |
90(等价4米填土)90 (equivalent to 4 m fill) | 24.924.9 |
120(等价6米填土)120 (equivalent to 6 meters fill) | 33.233.2 |
160(等价8米填土)160 (equivalent to 8 m fill) | 44.344.3 |
200(等价10米填土)200 (equivalent to 10 m fill) | 55.455.4 |
由上表数据,最大应力与荷载近似线性关系,可推出若采用Q345材质的波形钢板,材料屈服为345Mpa,则在此种规格参数以及截面尺寸下最大能承受荷载1246Kpa,折合填土高度为62米。From the data in the above table, the maximum stress and load are approximately linear. It can be deduced that if the steel plate with Q345 material is used, the material yields to 345Mpa, the maximum load can be 1246Kpa under such specifications and section size, and the equivalent fill height is 62. Meter.
(四)实验结论(4) Experimental conclusions
单独波纹钢管最大承受荷载为341Kpa;单独混凝土钢管最大承受荷载为678Kpa;板管组合结构最大承受荷载为1246Kpa。The maximum load of the corrugated steel pipe is 341Kpa; the maximum load of the concrete pipe is 678Kpa; the maximum load of the plate and pipe structure is 1246Kpa.
板管组合结构是单独波纹钢管承受荷载的3.65倍;板管组合结构是单独混凝土钢管承受荷载的1.84倍;板管组合结构是(单独波纹钢管+单独混凝土钢管)两者单独承受荷载之和的1.22倍。The composite structure of the tube and tube is 3.65 times of the load of the single corrugated steel tube; the combined structure of the tube and tube is 1.84 times of the load of the single concrete steel tube; the combined structure of the tube and tube is the sum of the loads of the two separate corrugated steel tubes + individual concrete steel tubes. 1.22 times.
综上所述,通过多组实验数据可发现:在管土共同受力作用下,弧形波纹板与弧形混凝土钢管组合后的承载能力是弧形波纹钢板与弧形混凝土钢管各自承载能力之和的1.23~1.4倍。
In summary, through the experimental data of multiple groups, it can be found that under the joint force of the pipe and soil, the bearing capacity of the curved corrugated plate and the curved concrete pipe is the bearing capacity of the curved corrugated steel plate and the curved concrete steel pipe. And 1.23 to 1.4 times.
Claims (9)
- 一种装配式拱桥,其特征在于:包括由板管组合单元沿拱桥长度和宽度方向拼接形成拱架,在拱架与桥面之间设有回填土或桁架结构;其中,所述板管组合单元包括弧形波纹板(1)和位于其内侧凹槽(2)内的管材(3),并在管材(3)内填充混凝土(4),弧形波纹板(1)的波纹纹路方向与拱桥的宽度相垂直。The utility model relates to a prefabricated arch bridge, which comprises: forming an arch frame by a combination of a tube and a tube unit along a length and a width direction of the arch bridge, and providing a backfill or truss structure between the arch frame and the bridge surface; wherein the plate and tube combination The unit comprises a curved corrugated plate (1) and a pipe (3) located in the inner groove (2) thereof, and the concrete (4) is filled in the pipe (3), and the corrugation direction of the curved corrugated plate (1) is The width of the arch is vertical.
- 根据权利要求1所述的装配式拱桥,其特征在于:所述板管组合单元中,弧形波纹板(1)内侧凹槽(2)内平行设置若干管材(5)。The prefabricated arch bridge according to claim 1, characterized in that in the plate tube assembly unit, a plurality of pipes (5) are arranged in parallel in the inner groove (2) of the curved corrugated plate (1).
- 根据权利要求1或2所述的装配式拱桥,其特征在于:所述板管组合单元中,在弧形波纹板(1)的两个弧形侧面设置周向法兰(102),相对的另外两侧设置纵向法兰(101)。The prefabricated arch bridge according to claim 1 or 2, wherein in the plate tube assembly unit, a circumferential flange (102) is disposed on two curved sides of the curved corrugated plate (1), and the other two are opposite The longitudinal flange (101) is provided on the side.
- 根据权利要求1所述的装配式拱桥,其特征在于:所述板管组合单元先沿拱桥的长度方向拼接形成单拱架结构(103),再将该单拱架结构(103)沿拱桥的宽度方向拼接得到拱架(5)。The prefabricated arch bridge according to claim 1, wherein the plate and tube combination unit is first spliced along the length direction of the arch bridge to form a single arch structure (103), and the single arch structure (103) is along the arch bridge. The arch is spliced in the width direction to obtain the arch (5).
- 根据权利要求4所述的装配式拱桥,其特征在于:所述板管组合单元沿拱桥的长度方向拼接时,位于弧形波纹板(1)内侧凹槽(2)内的管材(3)首尾相接形成连通结构。The prefabricated arch bridge according to claim 4, characterized in that: when the plate and tube assembly unit is spliced along the length of the arch bridge, the pipe (3) located in the inner groove (2) of the curved corrugated plate (1) is end to end. Connected to form a connected structure.
- 根据权利要求1所述的装配式拱桥,其特征在于:所述拱架(5)沿拱桥的长度方向连续设置形成多跨拱架。The prefabricated arch bridge according to claim 1, characterized in that the arches (5) are continuously arranged along the length of the arch bridge to form a multi-span arch.
- 根据权利要求1所述的装配式拱桥,其特征在于:所述拱架(5)与桥面之间设有分流管(7)。The prefabricated arch bridge according to claim 1, characterized in that a shunt tube (7) is arranged between the arch (5) and the bridge deck.
- 根据权利要求1所述的装配式拱桥,其特征在于:所述拱架的两端设有基座(104),该基座(104)设置在支墩(8)上。The prefabricated arch bridge according to claim 1, characterized in that both ends of the arch are provided with a base (104), and the base (104) is arranged on the buttress (8).
- 根据权利要求1所述的装配式拱桥,其特征在于:所述弧形波纹板(1)为弧形钢波纹板,管材(3)为钢管,拱架(5)为拱形钢架。 The prefabricated arch bridge according to claim 1, characterized in that the curved corrugated plate (1) is a curved steel corrugated plate, the pipe (3) is a steel pipe, and the arch (5) is an arched steel frame.
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CN111335137A (en) * | 2020-04-08 | 2020-06-26 | 深圳市市政设计研究院有限公司 | Deck type arch bridge structure and construction method thereof |
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