CN104213514B - A kind of earthing corrugated steel-concrete combination arch bridge add strong method - Google Patents

A kind of earthing corrugated steel-concrete combination arch bridge add strong method Download PDF

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CN104213514B
CN104213514B CN201410421742.1A CN201410421742A CN104213514B CN 104213514 B CN104213514 B CN 104213514B CN 201410421742 A CN201410421742 A CN 201410421742A CN 104213514 B CN104213514 B CN 104213514B
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concrete
corrugated steel
arch ring
steel
arch
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CN104213514A (en
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项贻强
何晓阳
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

What the invention discloses a kind of earthing corrugated steel-concrete combination arch bridge adds strong method, corrugated steel in the present invention-Combined concrete arch ring, can make arch ring intensity, rigidity strengthens greatly, the concrete at steel plate top, upside improves arch ring durability, shock resistance and fire line; Reinforced concrete circle beam protects roadbed bank protection, improves the overall lateral stiffness of composite construction; Steel concrete unloads support plate can enlarged configuration stress area, reduces stress that automobile mobile load produces arch ring and distortion; Zinc-plated corrugated steel tube can alleviate the dead load of combination arch ring, reduces stress and the distortion of combination arch ring, improves structure across footpath and aesthetic feeling.This adds strong method and has the features such as construction costs is low, speed of application fast, good endurance, maintenance cost are low, environmental protection, has a good application prospect in Mid and minor spans bridges and culverts.

Description

A kind of earthing corrugated steel-concrete combination arch bridge add strong method
Technical field
The invention belongs to earthing corrugated steel slab bridge and strengthen field, be specifically related to a kind of be applicable to earthing corrugated steel-concrete combination arch bridge add strong method.
Background technology
In, small culvert occupies an important position in highway and railway engineering.And now in, the small culvert overwhelming majority is steel concrete and masonry structure.Bricklaying and the design of reinforced concrete structure construction period longer, and very easily operation stage produce ftracture, peel off, seep water, the disease such as corrosion of steel bar, in seriously have impact on, the safety of small culvert structure, applicability and durability.Simultaneously on later maintenance is reinforced, even also to spend than the more fund of newly-built bridges and culverts, manpower.And compared with bricklaying and reinforced concrete structure, earthing corrugated steel structure has that construction costs is low, distortion adaptive faculty is strong, good endurance, easy construction, the feature few to environmental perturbation, be widely used in little of in the bridges and culverts of footpath, have broad application prospects in expansive soil, weak soil and Permafrost Area.Show according to the study, this kind of structural corrugations steel plate arch shell only bears about 30% of structure total load, and remainder all has the soil body around it to bear, and soil and corrugated steel structure synergy are significantly.For a lot of earthing corrugated steel arch bridge structure, because of a variety of causes such as constructions, the minimum constructive height of code requirement can not be reached at the thickness of earth covering of its vault.The earthing corrugated steel arch bridge built both at home and abroad at present substantially between 10m ~ 20m, need the span ability of increase structure badly to expand its range of application, and after increasing Long span, the problem that structural internal force increases just must overcome across footpath.
Summary of the invention
Deficiencies such as the object of the invention is to for existing medium and small bridges and culverts poor durability, long construction period, cost is high and less across footpath, the anti-flexion capabilities of existing earthing Corrugated Steel Bridge and Culvert is weak, anti-seismic performance is not strong, the vault depth of fill is inadequate, what provide a kind of earthing corrugated steel-concrete combination arch bridge adds strong method, by strengthening structure, reducing the defect that load two aspect overcomes above-mentioned medium and small bridges and culverts and general earthing corrugated steel slab bridge.
The object of the invention is to be achieved through the following technical solutions: a kind of earthing corrugated steel-concrete combination arch bridge add strong method, the method comprises the following steps:
(1) excavate bridge site soil layer and ground processed, laid hardcore bed, and placing steel concrete abut.
(2) be connected by high-strength bolt with the second corrugated steel by the first corrugated steel, the second corrugated steel is inverted in the first corrugated steel bottom, is undertaken being spliced to form corrugated steel arch ring of putting more energy into afterwards at transverse and longitudinal by high-strength bolt; During splicing, the adjacent transverse seam of corrugated steel arch ring of putting more energy into staggers 30-50cm;
(3) corrugated steel arch ring of putting more energy into is arranged on steel concrete abut, from arch springing to mud jacking concrete perfusion in arch ring cavity, after concrete reaches 90% of design strength, at the first corrugated steel top concreting, finally form corrugated steel-Combined concrete arch ring; Wherein, concrete is high-strength light fine concrete, and the concrete thickness of building at the first corrugated steel top should more than the first corrugated steel crest at least 15mm;
(4) install reinforced concrete circle beam in the both sides of corrugated steel-Combined concrete arch ring, after the concrete at the first corrugated steel top reaches 90% of design strength, placement in layers compacting sand, when arriving corrugated steel tube absolute altitude, installs corrugated steel tube;
(5) reach distance corrugated steel-Combined concrete arch ring vault 0.1-0.3m place in the filled height of compacting sand, place steel concrete and unload support plate, until complete the work of all soil layer backfill compactings; Wherein, steel concrete unloading plate thickness is 20-25cm, with bridge floor with wide, longitudinally covering the profile of corrugated steel-Combined concrete arch ring, extends 1-1.5m to both sides simultaneously;
(6) after compacting sand reaches bridge deck structure layer bottom surface absolute altitude, Gravel road base, bituminous concrete subbase and asphalt concrete pavement are laid in layering, form bridge deck structure layer, install the Anti-collision railing of bridge in bridge floor both sides.
Further, the thickness of described compacting sand every layer is 0.5-0.6m; Near corrugated steel-Combined concrete arch ring, the degree of compaction of compacting sand is 0.92-0.95, and the degree of compaction of other region compacting sands is 0.96-0.98.
Beneficial effect of the present invention is as follows:
1, the present invention is connected assembled for corrugated steel by high-strength bolt, and build light high strength concrete formation corrugated steel-Combined concrete arch ring at its cavity formed and corrugated steel top, upside, stressed arch ring intensity can be made, rigidity strengthens greatly, and top concrete formwork for placing is provided, the concrete at steel plate top, upside improves arch ring vertical cross stiffness, durability, shock resistance, fire line simultaneously, overcome the problem of the type structure arch ring flexing and corrugated steel corrosion to a certain extent, and then reduce the reinforcing maintenance cost of arch ring when operation uses.
2, the present invention arranges reinforced concrete circle beam in the wide both sides of bridge, protects fill subgrade bank protection, improves the overall lateral stiffness of steel-native composite construction, further increases the globality and shock resistance of banketing and combine arch ring.
3, the present invention places steel concrete and unloads the region that support plate can expand structure stress in banketing, and weakens the adverse effect of vault depth of fill deficiency, makes box hat structure stress more even, greatly reduces stress that automobile mobile load produces arch ring and distortion simultaneously.
4, the present invention places zinc-plated corrugated steel tube and can alleviate the dead load of combination suffered by arch ring in banketing, and reduces stress and the distortion of built-up arch coil structures, improve earthing corrugated steel arch bridge across footpath and aesthetic feeling, simultaneously in flood heavy rain season, also can be used as flood discharge hole.
Accompanying drawing explanation
Fig. 1 is earthing of the present invention corrugated steel-concrete combination arch bridge elevation;
Fig. 2 is earthing of the present invention corrugated steel-concrete combination arch bridge structure I-I cross-sectional drawing;
Fig. 3 is corrugated steel-Combined concrete arch ring 1-1 cross-sectional drawing;
Fig. 4 is corrugated steel and corrugated steel tube 2-2 cross-sectional drawing;
Fig. 5 is corrugated steel plate arch spliced map;
Fig. 6 is soil layer backfill construction figure of the present invention;
In figure, corrugated steel-Combined concrete arch ring 1, steel concrete unload support plate 2, corrugated steel tube 3, compacting sand 4, steel concrete abut 5, hardcore bed 6, bridge deck structure layer 7, Anti-collision railing 8, ground 9, high-strength bolt 10, concrete 11, first corrugated steel 12, reinforced concrete circle beam 13, second corrugated steel 14.
Detailed description of the invention
As shown in Fig. 1 to Fig. 6, earthing corrugated steel-concrete combination arch bridge of the present invention add strong method, comprise the following steps:
1, excavate bridge site soil layer, smooth compacting foundation 9, laid hardcore bed 6, and place steel concrete abut 5.
2, be connected by high-strength bolt 10 with the second corrugated steel 14 by the first corrugated steel 12, the second corrugated steel 14 is inverted in the first corrugated steel 12 bottom, is undertaken being spliced to form corrugated steel arch ring of putting more energy into afterwards at transverse and longitudinal by high-strength bolt 10; During splicing, the adjacent transverse seam of corrugated steel arch ring of putting more energy into staggers 30 ~ 50cm; The corrugated steel arch ring of putting more energy into obtained can improve stressed arch ring vertical transverse strength, rigidity strengthens.
3, corrugated steel arch ring of putting more energy into is arranged on steel concrete abut 5, from arch springing to mud jacking concrete perfusion 11 in arch ring cavity, after concrete 11 reaches 90% of design strength, at the first corrugated steel 12 top concreting 11, finally form corrugated steel-Combined concrete arch ring 1; Wherein, concrete 11 is high-strength light fine concrete, and the thickness of the concrete 11 of building at the first corrugated steel 12 top should more than the first corrugated steel 12 crest at least 15mm, to reach the object of protection corrugated steel.Formed corrugated steel-Combined concrete arch ring 1 can make structural strength, rigidity strengthens further significantly, and top concrete formwork for placing is provided, first corrugated steel 12 top concrete 11 improves the corrugated steel-vertical cross stiffness of Combined concrete arch ring 1, durability, shock resistance, fire line simultaneously, overcome the problem of the type structure arch ring flexing and corrugated steel corrosion to a certain extent, and then reduce the reinforcing maintenance cost of arch ring when operation uses.
4, in the both sides of corrugated steel-Combined concrete arch ring 1, reinforced concrete circle beam 13 is installed, after the concrete 11 at the first corrugated steel 12 top reaches 90% of design strength, placement in layers compacting sand 4, when arriving corrugated steel tube 3 absolute altitude, installs corrugated steel tube 3; Wherein compacting sand 4 thickness of every layer is 0.5 ~ 0.6m; Near corrugated steel-Combined concrete arch ring 1, the degree of compaction of compacting sand 4 is 0.92-0.95, and the degree of compaction of other region compacting sands 4 is 0.96-0.98, and corrugated steel tube 3 can adopt general self-contained steel pipe, and pipe sheet assembling also can be adopted to form.The reinforced concrete circle beam 13 arranged, protects fill subgrade bank protection, improves the overall lateral stiffness of steel-native composite construction, further increase globality and the shock resistance of compacting sand 4 and corrugated steel-Combined concrete arch ring 1.
5, when the filled height of compacting sand 4 reaches distance corrugated steel-Combined concrete arch ring 1 vault 0.1 ~ 0.3m place, place steel concrete and unload support plate 2, until complete the work of all soil layer backfill compactings; Wherein, it is 20-25cm that steel concrete unloads support plate 2 thickness, with bridge floor with wide, longitudinally covering the profile of corrugated steel-Combined concrete arch ring 1, extends 1 ~ 1.5m to both sides simultaneously; Steel concrete unloads support plate 2 can expand stress area, makes box hat structure stress more even, greatly reduces automobile mobile load to the stress of corrugated steel-Combined concrete arch ring 1 generation and distortion simultaneously.
6, after compacting sand 4 reaches bridge deck structure layer 7 bottom surface absolute altitude, Gravel road base, bituminous concrete subbase and asphalt concrete pavement are laid in layering, form bridge deck structure layer 7, install the Anti-collision railing 8 of bridge in bridge floor both sides.Gravel road base, bituminous concrete subbase and asphalt concrete pavement should road route grade residing for earthing corrugated steel-concrete combination arch bridge structure and carload be determined; The bridge-collision-avoidance railing 8 installed in bridge floor both sides, it is of a size of wide 0.5m* height 1.1m.

Claims (2)

1. earthing corrugated steel-concrete combination arch bridge add a strong method, it is characterized in that, comprise the following steps:
(1) excavate bridge site soil layer and ground (9) processed, laid hardcore bed (6), and placing steel concrete abut (5);
(2) the first corrugated steel (12) is connected by high-strength bolt (10) with the second corrugated steel (14), second corrugated steel (14) is inverted in the first corrugated steel (12) bottom, is undertaken being spliced to form corrugated steel arch ring of putting more energy into afterwards at transverse and longitudinal by high-strength bolt (10); During splicing, the adjacent transverse seam of corrugated steel arch ring of putting more energy into staggers 30-50cm;
(3) corrugated steel arch ring of putting more energy into is arranged on steel concrete abut (5), from arch springing to mud jacking concrete perfusion (11) in arch ring cavity, after concrete (11) reaches 90% of design strength, at the first corrugated steel (12) top concreting (11), finally form corrugated steel-Combined concrete arch ring (1); Wherein, concrete (11) is high-strength light fine concrete, and the thickness of the concrete (11) of building at the first corrugated steel (12) top should more than the first corrugated steel (12) crest at least 15mm;
(4) in the both sides of corrugated steel-Combined concrete arch ring (1), reinforced concrete circle beam (13) is installed, after the concrete (11) at the first corrugated steel (12) top reaches 90% of design strength, placement in layers compacting sand (4), when arriving corrugated steel tube (3) absolute altitude, corrugated steel tube (3) is installed;
(5) reach distance corrugated steel-Combined concrete arch ring (1) vault 0.1-0.3m place in the filled height of compacting sand (4), place steel concrete and unload support plate (2), until complete the work of all soil layer backfill compactings; Wherein, it is 20-25cm that steel concrete unloads support plate (2) thickness, with bridge floor with wide, longitudinally covering the profile of corrugated steel-Combined concrete arch ring (1), extends 1-1.5m to both sides simultaneously;
(6) after compacting sand (4) reaches bridge deck structure layer (7) bottom surface absolute altitude, Gravel road base, bituminous concrete subbase and asphalt concrete pavement are laid in layering, form bridge deck structure layer (7), install the Anti-collision railing (8) of bridge in bridge floor both sides.
2. according to claim 1 a kind of earthing corrugated steel-concrete combination arch bridge add strong method, it is characterized in that, the thickness of described compacting sand (4) every layer is 0.5-0.6m; Near corrugated steel-Combined concrete arch ring (1), the degree of compaction of compacting sand (4) is 0.92-0.95, and the degree of compaction of other region compacting sands (4) is 0.96-0.98.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867371A (en) * 2018-07-13 2018-11-23 石家庄铁道大学 A kind of bridge deck structure of arch type bridge engineering

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CN105484169B (en) * 2015-12-31 2017-08-22 长安大学 A kind of plate girder bridge ruggedized construction and its construction method
CN106958208A (en) * 2017-03-07 2017-07-18 武汉理工大学 A kind of novel reinforced method of double curvature arched bridge
CN111101446B (en) * 2019-12-29 2021-07-16 正平路桥建设股份有限公司 Construction method of soil-covered corrugated steel plate bridge
CN111424567B (en) * 2020-03-26 2021-08-24 中电建十一局工程有限公司 Highway soft soil foundation culvert construction method
CN111676836A (en) * 2020-04-22 2020-09-18 青海路拓工程设施制造集团有限公司 Reinforcing construction method for corrugated steel of existing old small bridges and culverts

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JP2006090026A (en) * 2004-09-24 2006-04-06 Oriental Construction Co Ltd Repairing/reinforcing structure of existing steel member arch bridge
KR100565865B1 (en) * 2005-12-15 2006-03-30 우경건설 주식회사 Construction method of concrete arch bridge
CN103758046B (en) * 2013-12-31 2016-10-05 中铁大桥局集团有限公司 The reinforcement means of CFST Arch Bridge main beam structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867371A (en) * 2018-07-13 2018-11-23 石家庄铁道大学 A kind of bridge deck structure of arch type bridge engineering

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