CN205934687U - Antinode worker roof beam - steel concrete roof - external prestress combination T type simple beam - Google Patents

Abstract

Antinode worker roof beam - steel concrete roof - external prestress combination T type simple beam, including antinode worker roof beam (1), roof (2) and external prestress cable (3), the longeron adopts antinode worker roof beam, need not set up the web stiffening rib, has solved the web thoroughly because of the not enough fracture that causes of the ability of shearing, the cross section of roof is for uprising the cross -section, and the longitudinal joint of T type roof beam has been avoided to weight loss 30%~40%, about the antinode worker roof beam flange plate respectively with roof beam body top bottom plate parallel and level, full play the effect of antinode worker roof beam strength nature skeleton, temporary facility when simplifying the roof and pouring, antinode worker roof beam lower edge sets up the external prestress cable, makes the simple beam need not set up the camber in advance that is used for offsetting the dead load amount of deflection, the simple beam appearance adopts the fish belly formula, ability save material when guaranteeing simple beam moment of flexure carrying capacity, the utility model provides a construction of T type simple beam is fast, the wholeness is good, bearing capacity is big, is particularly suitable for the city deck bridge and disturbs the underbridge receiving close check, nervous engineering of time limit for a project.

Description

Antinode work beam-steel concrete top board-external prestressing combines T-shaped simply supported beam

Technical field

This utility model is related to top, the Wavelike steel webplate work beam of base plate and steel concrete combination top board and external prestressing tendon The T-shaped simply supported beam of institute's common combination.In simply supported beam field by they integrated give full play to respective advantage, and enable no Frame is constructed, and is a kind of light-duty practicality, easily bridges in overhead road of city overbridge.

Background technology

The Development of China's Urbanization of China achieves huge achievement in recent years, meanwhile, urban transportation is proposed higher Requirement, conventional traffic infrastructure can not meet the needs of urban development.The appearance of urban viaduct, it is possible to resolve hand over Lead to the problems such as crowded, vertically and horizontally interference is big, accident is many, thus effectively alleviating urban traffic deficiency, formation and ground master The spatial model that arterial highway combines can economize the land resource to greatest extent, environmental protection.China's urban viaduct crosses over city at present During city's major trunk roads, its across footpath often reaches 50～60m, exceedes general prestressed concrete T-type beam spanning footpath scope it has to adopt not Economic steel box-girder, therefore Study on Steel concrete combination new construction has certain engineering significance.

1. pre-stress concrete beam bridge

Prestressed concrete T beam bridge has the advantages that low cost, construction technology are ripe, has obtained widely within 50m spanning Application.But the development with communication, traffic flow grows with each passing day, and large-tonnage vehicle continues to bring out, and overload of vehicle phenomenon is long Phase cannot get effective control, and large quantities of operations prestressed concrete T beam simply supported beam rib of only 20～30 years, flange plate and diaphragm plate occur The local longitudinal cracks existing at seam are cut with scissors in different degrees of crack, especially T beam, and to be gradually extended to longitudinal damaged band serious Affect road-ability, or even injure traffic safety, be therefore badly in need of finding the new model of T beam.When overpass and trunk When road or navigation axially bored line oblique, its across footpath is commonly greater than 50m it has to frequently with prestress concrete box girder.Prestress concrete box girder From great, lifting inconvenience, and adopt Hanging Basket cantilever pouring, long construction period, traffic under impact bridge.

2. steel box-girder

Steel box-girder feature is from heavy and light, and span ability is big, and factory is transported to building site integral hoisting after manufacturing, and enables no support Construction.Steel box-girder top surface typically adopts Orthotropic Steel Bridge Deck, then pours asphalt concrete paving layer thereon.China in recent years Urban transportation amount is in explosive growth, and overweight vehicle commander's phase cannot get under the background of effective control, Orthotropic Steel Bridge Deck Colophonium Concrete pave-load layer occurs in that the diseases such as crack, rut, delamination, passage, pit repeatedly, and its basic reason is asphalt concrete paving layer and steel Panel stiffness difference too big it is impossible to good collective effect, caused by causing top surface steel plate rigidity not to produce fatigue rupture.Secondly U Inconel weld between rib and steel bridge deck makes U ribs of steel box girder easily produce fatigue crack under the repeated action of vehicular load Destroy globality, moreover support the fatigue that the diaphragm plate of U rib also often occurs weld seam.Chinese at present hundreds of orthotropic slabs It is anxious to be resolved that quality problems in bridge floor.

3. antinode work beam and external prestressing structure

Corrugated sheet steel is with the product after plain plate cold moudling, and its tensile strength and shearing strength are about the 30～40 of concrete Times.Replace concrete web can thoroughly solve the phenomenon of cracking in webs with corrugated sheet steel, especially overweight car effect under improvement more Substantially.In Wavelike steel webplate upper and lower end, welding steel forms work Liangqi crosswise moment of inertia greatly again, and good stability can cancel web Ribbed stiffener, in work China Democratic National Construction Association, industry is widely applied, and has obtained patent (patent No. CN201420811093.1).Pre- in vitro Stress, compared with conventional prestress system, has unique advantage：External prestressing steels are only at anchored end and steering block and coagulation Soil contact, prestressing frictional loss is little；External prestressing steels are arranged in outside agent structure section, reduce concrete component Sectional dimension, is also convenient for detection, safeguards and replace.China's external prestressed cable is progressively promoted in prestressed concrete continuous beam bridge and is made With the technique such as its anchorage, stretch-draw jack and steering block is gradually ripe.For example in Su-Tong Brideg 75m across footpath box beam, using overall length Reach 2.5km.Therefore possesses the condition being introduced into steel work beam.

In addition, Chinese patent 201420811093.1 in 2014 propose double dimension waveform steel and concrete combined bridge deck Plate, the floorings (i.e. top board) of this patent combine composition by ultra-high performance concrete (abbreviation RPC) and horizontal waveform steel sole plate, horizontal It is fixedly welded with the vertical Wavelike steel webplate vertical with horizontal corrugated sheet steel, vertical Wavelike steel webplate to the bottom surface of waveform steel sole plate Bottom affixed horizontal base steel plate, its vertical Wavelike steel webplate constitutes antinode work girder construction with horizontal waveform steel sole plate, in lateral wave RPC poured on shape steel sole plate, forms double dimension waveform steel and RPC combined bridge deck, in the program, horizontal waveform steel sole plate with vertical Wavelike steel webplate, is mentioned in this patent it is ensured that structural integrity using welding：Its longitudinal across footpath is orthogonal compared with horizontal spacing Different in nature steel plate all increases 2～3 times so that the orthogonal quantity of floor can reduce 4～9 times, that is, decrease the quantity of weld seam, greatly Improve structure durability, reduce fatigue rupture odds, but require because ultra-high performance concrete (RPC) makes Height, expense is up to 30,000 yuan/cubic metre, using uneconomical in general overpass, thus limiting popularization.

In sum, the combination of antinode work beam, steel concrete combination top board and external prestressing, is the combination of urban interchange steel concrete T-shaped simply supported beam breed the condition of providing.

Utility model content

This utility model purpose is to provide antinode work beam-steel concrete top board-external prestressing to combine T-shaped simply supported beam, with Solve the problems, such as to propose in background technology.

For achieving the above object, this utility model provides a kind of antinode work beam-steel concrete top board-external prestressing combination T-shaped simply supported beam, including antinode work beam 1, top board 2 and external prestressing tendon 3, described antinode work beam is included in i shaped steel structure Top flange plate 13, Wavelike steel webplate 11 and bottom wing listrium 12, described top flange plate and bottom wing listrium are length direction along freely-supported The vertical bridge of beam to setting steel plate, described Wavelike steel webplate be vertically arranged and its wavelength direction equally along simply supported beam vertical bridge to The corrugated sheet steel of setting, the horizontal cross-section of Wavelike steel webplate is in undaform；Described top board 2 includes horizontal waveform steel bed die and pours Reinforced concrete thereon, the two collectively forms steel concrete combinative structure, described horizontal waveform steel bed die include under flat board support 22 and in setback shape steel plate 23 that is upper and being connected with flat board support, its top surface and antinode Gong Liang top flange after reinforcing bar concrete placings Plate 13 flushes or covers antinode work beam top flange plate, and described flat board support 22 includes being respectively fixedly disposed at Wavelike steel webplate 11 plate Face both sides and two blocks of plain plates of height identical (221 and 222), the Waveform Matching of described plain plate and Wavelike steel webplate, and Described flat board support 22 and setback shape steel plate 23 are arranged at the lower section of described top flange plate 13；

Described setback shape steel plate 23 include the upper flat face 231 parallel with top board 2 top surface and under hold with flat board The inclined plane 232 that support 22 is connected, the bending part of setback shape steel plate 23 is the boundary of flat face 231 and inclined plane 232；

It is connected with stull 14 and diagonal brace 15, the top surface of part stull is provided with concrete between adjacent two antinode work beam 1 bottoms Diaphragm plate 16, described concrete diaphragm plate includes the cast-in-place end diaphragm plate 161 at the support position of simply supported beam two ends and is located at Prefabricated middle diaphragm plate 162 between two bearings, has poured between middle diaphragm plate and antinode work beam 1 for diaphragm plate and ripple in being connected The concrete joint 17 of shape steel web, the side that outermost Wavelike steel webplate 11 does not set middle diaphragm plate is provided with another with this Wavelike steel webplate The one-to-one concrete of each middle diaphragm plate in side puts more energy into 18, and described concrete joint and concrete are put more energy into and be arranged at lower flange in the height direction Between plate 12 and flat board support 22；

Described external prestressing tendon includes anchor 31, turns to block assembly 32, external prestressing steels 33, described anchoring dress Put and be embedded at end diaphragm plate and its concrete joint location, described steering block assembly is embedded in middle diaphragm plate and its concrete joint, concrete add The bottom of strength, described external prestressing steels are located in steering block assembly and anchor, and the external prestressing steels after tensioning are used In the dead load amount of deflection eliminating simply supported beam, simply supported beam is made to be not required to the camber being provided for offsetting dead load amount of deflection；

Bridge pier 6 at the bearing of described simply supported beam two ends is split-type structural, that is, bridge pier include two point bridge piers (61 and 62), leave, between two points of bridge piers, the spacing being conveniently replaceable external prestressing tendon.

The Wavelike steel webplate bottom lateral profile being fixed with bottom wing listrium is fish-bellied type structure.

The across footpath scope of described simply supported beam is 40～60 meters.

Between adjacent two diagonal braces 15 and between the stull 14 of adjacent two along simply supported beam indulge bridge to distance be equal to waveform 1～2 times of the single wavelength of steel web 11, simply supported beam indulge bridge upwards every 6～8 meters of distance be provided with stull 14 be clipped in adjacent Concrete diaphragm plate 16 between two antinode work beams 1.

Described external prestressing steels adopt the steel strand wires of Φ 21.8mm, and every hole arranges 9～12 steel strand wires.

The reinforced concrete being cast on horizontal waveform steel bed die includes being cast in entirely the steel fibre on horizontal waveform steel bed die Reinforced concrete, the bar-mat reinforcement 26 in steel fibre reinforced concrete is fixed on horizontal waveform steel bed die by vertical peg 28, wherein vertically Peg is uniformly equally distributed on flat face 231 and along the direction setting vertical with flat face, and vertical peg top is less than steel concrete Top board upper limb 21, described bar-mat reinforcement 26 includes the two-layer up and down along the setting of top board 2 thickness direction.

It is the plane that a segment length is less than 0.5 times of wavelength, ripple at crest and wave trough position on described Wavelike steel webplate 11 Plane at peak and wave trough position is welded with angle steel stiffener 25 with the seam crossing of flat board support 22.

The horizontal waveform steel bed die seam crossing of adjacent two top boards 2 is provided with junction steel plate 20, and junction steel plate is horizontal along simply supported beam Direction two ends are fixedly connected with two pieces of horizontal waveform steel bed dies positioned at seam both sides respectively.

Beneficial effect：The utility model proposes antinode work beam, steel concrete combine top board, external prestressing combination formed T Type simply supported beam, have that speed of application is fast, good integrity, large carrying capacity the features such as, be particularly suitable for city overbridge and to bridge The engineering that lower interference is strictly controlled, the duration is nervous, advantage of the present utility model is mainly reflected in the following aspects：

1. longeron adopts antinode work beam.I-steel does after web using waveform steel, and lateral stability is improved, and is not required to Setting web ribbed stiffener, material-saving 10%.The upper and lower flange plate of antinode work beam can be widened, thicken raising longitudinal moment of inertia (ratio General I-beam bearing power increase 20%).Antinode work beam does web compared with concrete web, allows shearing strength due to steel (80MPa) it is at least 27 times that concrete allows shearing strength (3MPa), its web thickness only has the 1/9 of concrete, therefore so that deadweight is not only subtracted Light by 20%, and thoroughly solve the problem of Cracking that concrete web causes because shear resistance is not enough.In terms of construction technology, Antinode work beam can serve as the load-bearing longeron pouring top plate concrete in construction, and Wavelike steel webplate and bottom wing listrium are not required to want mould Plate, therefore can convenient construction and reduction of erection time, reduce cost.

2. top board lower edge setting waveform steel bed die, forms steel concrete compound section with top plate concrete, steel plate can be with thinning concrete thickness With strengthen horizontal globality, the utility model proposes the bottom surface of top board setting plain plate as flat board support, elder generation and longitudinal wave Shape steel web welds, it is possible to resolve top board is not enough with the long-term cohesive force of steel longeron, so that globality is reliably ensured.In addition, by It is to uprise section in the cross section that fold-line-shaped horizontal waveform steel bed die makes top board, top board is thick near the position of Wavelike steel webplate, its Remaining part position is thin, and compared with commonly straight concrete top board, weight saving 30%～40%, due to the effect of waveform steel bed die, longitudinal rib Horizontal spacing 4m can be increased to by the 2.4m of T beam, increase 1.6 times, for 12m width bridge, become 3 antinodes by 5 T beams Work beam, decreases 40%, saves steel, reduces cost.In the construction stage, during top board concrete placings, steel bed die eliminates dress The trouble of template.Further, since the planarization that top plate concrete can reliably ensure concrete top board is poured on the steel plate being welded, so 8～10cm concrete the leveling layer needed for concrete T beam can be cancelled in bridge floor.In T-shaped beam article points seam, in the weldering of steel bed die joint Connect a junction steel plate, be effectively improved the situation of longitudinal cracking between each bar longeron it is ensured that the reliability of seam.It should be pointed out that by In the setting of steel bed die, the top board of T beam can horizontal disposable one-piece casting in the range of total cross-section, fundamentally eliminate T-shaped The longitudinal joint of beam.

3. the employing of major diameter external tendon.External tendon nominal diameter is usually 15.2mm both at home and abroad at present, and diameter is little, rope number Many, operation is many, construction trouble, and this patent adopts the anchorage of OVM company nominal diameter 21.8mm newly developed, this set anchorage at present In Jiangxi Ji'an Jinggang Mountain economic and technological development zone Shenzhen, bridge is successfully applied, 12 hole Φ 21.8mm of its research and development Suo Li be equivalent to 26 hole Φ 15.2mm, radical decreases 54%, facilitates construction, due to work China Democratic National Construction Association industry steel construction antinode work Beam allows amount of deflection big (L/500), has exceeded the safety requirements of highway simply supported beam operation, therefore bears pressure in steel concrete combination top board In the case of, to bear pulling force and to overcome dead load amount of deflection in antinode work beam lower edge setting external prestressing tendon, to make simply supported beam be not required to set Put the camber for offsetting dead load amount of deflection, thus forming a kind of Novel steel concrete to combine T-shaped simply supported beam.

4. simply supported beam profile adopts fish-bellied type.Fish-bellied type is that the T-shaped simply supported beam of Chinese 50m develops earliest blank, this practicality In new, Wavelike steel webplate bottom lateral profile is fitted like a glove with the sagging moment figure of simply supported beam, bears in guarantee simply supported beam moment of flexure Can material-saving while ability；Further, since waveform steel can not directly bear the power along simply supported beam longitudinal direction, this practicality is new In type, external prestressed cable is anchored on the end diaphragm plate at the support position of two ends, for Wavelike steel webplate, it is to avoid Direct anchoring prestress external tendon on Wavelike steel webplate.

Antinode Gong Liang top flange is concordant with concrete top board 5., so that horizontal work crossbeam forms construction passage, realize top plate concrete The erection without scaffolding pouring.Conventional Wavelike steel webplate PC concrete box beam, horizontal waveform steel bed die is arranged on antinode work back portion, pours Building top plate concrete also needs separately to set falsework.Will be concordant with top board upper limb for antinode work beam top flange plate in this utility model scheme, Before pouring top plate concrete, on horizontal I-steel, horizontal waveform steel bed die is welded and fixed, thus pouring by welding vertical reinforcement During can efficiently control bottom deformation.

6. antinode work beam lateral ties.Antinode work beam lower edge not pouring concrete, can mitigate weight.Every between each work beam Weld a stull and diagonal brace away from 1～2 wavelength, stull and diagonal brace are with Wavelike steel webplate and lower flange plate weld it is ensured that ripple The horizontal globality of abdomen work beam.In stull, Prefabricated Concrete diaphragm plate is installed every 6～8m, pours concrete and between longitudinal antinode work beam and connect Head is it is ensured that the torsional rigidity of antinode work beam.

In addition to objects, features and advantages described above, this utility model also has other purposes, feature and excellent Point.Below with reference to figure, this utility model is described in further detail.

Brief description

The accompanying drawing constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model Schematic description and description is used for explaining this utility model, does not constitute to improper restriction of the present utility model.In accompanying drawing In：

Fig. 1 is the antinode work beam overall structure front view of this utility model preferred embodiment；

Fig. 2 is the antinode work beam overall structure top view of this utility model preferred embodiment；

Fig. 3 is the T-shaped simply supported beam overall structure drawing in side sectional elevation of this utility model preferred embodiment；

Fig. 4 is the T-shaped simply supported beam partial longitudinal section of this utility model preferred embodiment；

Fig. 5 is the half-sectional view at the T-shaped simply supported beam span centre position of this utility model preferred embodiment；

Fig. 6 is that the stull of this utility model preferred embodiment arranges top view with diagonal brace；

Fig. 7 is the Wavelike steel webplate top plan view of this utility model preferred embodiment；

Fig. 8 is the steel concrete combination top board cross-section details zoomed-in view of this utility model this utility model preferred embodiment.

In figure：1- antinode work beam；11- Wavelike steel webplate；12- bottom wing listrium；13- top flange plate；14- stull；15- is oblique Support；16- concrete diaphragm plate；161- end diaphragm plate, diaphragm plate in 162-, 17- concrete joint, 18- concrete is put more energy into, 2- top board；20- connects steel Plate；21- top board upper limb；22- flat board support；221- plain plate A；222- plain plate B；23- setback shape steel plate；231- flat face； 232- inclined plane；25- angle steel stiffener；26- bar-mat reinforcement；261- longitudinal reinforcement, 262- transverse steel, 263- vertical reinforcement, 27- Steel fiber reinforced concrete；The vertical peg of 28-；3- external prestressing tendon, 31- anchor, 32- turns to block assembly, and 33- in advance should in vitro Power muscle, 6- bridge pier；60- bearing；61- divides bridge pier A；62- divides bridge pier B.

Specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this utility model can be according to power Profit requires the multitude of different ways limiting and covering to implement.

A kind of antinode work beam-steel concrete top board referring to Fig. 1～Fig. 8-external prestressing combines T-shaped simply supported beam, including ripple Abdomen work beam 1, top board 2 and external prestressing tendon 3, antinode work beam includes top flange plate 13 in i shaped steel structure, waveform steel abdomen Plate 11 and bottom wing listrium 12, top flange plate and bottom wing listrium are length direction along the vertical bridge of simply supported beam to the steel plate arranging, ripple Shape steel web be vertically arranged and its wavelength direction equally along simply supported beam vertical bridge to setting corrugated sheet steel, Wavelike steel webplate Horizontal cross-section is in undaform；Top board 2 includes horizontal waveform steel bed die and the reinforced concrete pouring thereon, and the two collectively forms steel concrete Combinative structure, horizontal waveform steel bed die include under flat board support 22 and upper and with flat board support be connected setback shape Steel plate 23, after reinforcing bar concrete placings, its top surface is flushed with antinode work beam top flange plate 13 or covers antinode work beam top flange plate, flat board That support 22 includes being respectively fixedly disposed at Wavelike steel webplate 11 plate face both sides and two blocks of plain plates of height identical (221 with 222), the Waveform Matching of plain plate and Wavelike steel webplate, and flat board support 22 and setback shape steel plate 23 are arranged at top flange plate 13 lower section；

Setback shape steel plate 23 include the upper flat face 231 parallel with top board 2 top surface and under with flat board support 22 Connected inclined plane 232, the bending part of setback shape steel plate 23 is the boundary of flat face 231 and inclined plane 232；

It is connected with stull 14 and diagonal brace 15, the top surface of part stull is provided with concrete between adjacent two antinode work beam 1 bottoms Diaphragm plate 16, concrete diaphragm plate includes the cast-in-place end diaphragm plate 161 at the support position of simply supported beam two ends and is located at two Prefabricated middle diaphragm plate 162 between seat, has poured between middle diaphragm plate and antinode work beam 11 for diaphragm plate and waveform in being connected The concrete joint 17 of steel web, the side that outermost Wavelike steel webplate 11 does not set concrete diaphragm plate is provided with another with this Wavelike steel webplate Each concrete diaphragm plate one-to-one concrete in side puts more energy into 18, concrete joint and concrete put more energy into be arranged in the height direction bottom wing listrium 12 with Between flat board support 22；

External prestressing tendon includes anchor 31, turns to block assembly 32, external prestressing steels 33, and anchor is embedded in On at the tabula Board position of end, turn to that block assembly is embedded in middle diaphragm plate and its concrete joint, concrete are put more energy into bottom, external prestressing steels are worn It is located in steering block assembly and anchor, the external prestressing steels after tensioning are used for eliminating the dead load amount of deflection of simply supported beam, make letter Strutbeam is not required to the camber being provided for offsetting dead load amount of deflection；

In the present embodiment, the bridge pier 6 at the bearing of simply supported beam two ends is split-type structural, and that is, a bridge pier is included along simply supported beam Vertical bridge, to two points of bridge piers (61 and 62) of alignment setting, leaves between two points of bridge piers and is conveniently replaceable between external prestressing tendon Away from.

In the present embodiment, the Wavelike steel webplate bottom lateral profile being fixed with bottom wing listrium is fish-bellied type structure.

Simply supported beam across footpath described by the present embodiment is 40～60m.

In the present embodiment, between adjacent two diagonal braces 15 and between the stull 14 of adjacent two along simply supported beam indulge bridge to away from From equal to 1～2 times of the single wavelength of Wavelike steel webplate 11, indulge bridge along simply supported beam and set in stull 14 to the distance every 6～8 meters There is the concrete diaphragm plate 16 being clipped between adjacent two antinode work beams 1.

In the present embodiment, external prestressing steels adopt the steel strand wires of Φ 21.8mm, and every hole arranges 9～12 steel strand wires, single Piece T beam arranges 4 prestressed pore passages.

The reinforced concrete being cast on horizontal waveform steel bed die includes being cast in entirely the steel fibre on horizontal waveform steel bed die Reinforced concrete, the bar-mat reinforcement 26 in steel fibre reinforced concrete is fixed on horizontal waveform steel bed die by vertical peg 28, wherein vertically Peg is uniformly equally distributed on flat face 231 and along the direction setting vertical with flat face, and vertical peg top is less than steel concrete Top board upper limb 21, bar-mat reinforcement 26 includes the two-layer up and down along the setting of top board 2 thickness direction.

Be the plane that a segment length is less than 0.5 times of wavelength at crest and wave trough position on Wavelike steel webplate 11, crest and Plane at wave trough position is welded with angle steel stiffener 25 with the seam crossing of flat board support 22.

The horizontal waveform steel bed die seam crossing of adjacent two top boards 2 is provided with junction steel plate 20, and junction steel plate is horizontal along simply supported beam Direction two ends are fixedly connected with two pieces of horizontal waveform steel bed dies positioned at seam both sides respectively.

Wavelike steel webplate 11 adopts 1200 types or 1600 types, the i.e. single wavelength of Wavelike steel webplate 1200～1600mm, waveform Steel web thickness 0.8～1.4cm, wave height 20～22cm.The thick 2.0cm of antinode work beam top flange plate 13, width 60cm, bottom wing listrium 12 thickness by calculate determine in 3.0～5.0cm scope, width 80～100cm.Bottom between two antinode work beams, welded H type As stull 14 and diagonal brace 15, stull two ends are welded at the plan-position of Wavelike steel webplate Wave crest and wave trough steel, simultaneously horizontal Support is also connected with the lower flange plate weld at this, and stull diagonal brace width 20～30cm, highly 20～60cm are spaced apart 1～2 ripple Shape steel web wavelength.Every 6～8m lift one piece of precast reinforced middle diaphragm plate 162, its thickness of slab 30～40cm, after lifting, die-filling Pour concrete joint 17 and the outermost concrete of Wavelike steel webplate and put more energy into and 18 be linked to be entirety.

The horizontal waveform steel bed die of top board 2 is laterally waveform, and its thickness adopts 6～10mm.With longitudinal Wavelike steel webplate 11 Intersection setting flat board support 22, flat board support width 80cm is flat with what Wavelike steel webplate 11 waveform matched with two pieces of left and right Steel plate A221 and plain plate B222 and Wavelike steel webplate 11 weld, and in addition weld angle steel stiffener 25 in commissure and put more energy into.Setback Shape steel plate 23 is welded in flat board support by way of joint welding, forms horizontal waveform steel bed die.Flat face 231 welds again Vertical peg 28 (not setting peg at inclined plane 232)：Vertical peg diameter 10～12mm, spacing 100 × 100mm, vertical peg Top 10mm lower than top board upper limb 21.Peg is equivalent to vertical stirrup in top board, arranges down two-layer diameter 10mm's thereon Bar-mat reinforcement 26 (spacing 100 × 100mm), in the present embodiment, bar-mat reinforcement includes being arranged vertically on two-by-two in horizontal waveform steel bed die Longitudinal reinforcement 261, transverse steel 262 and vertical reinforcement 263.In order to increase the elastic modelling quantity of concrete, reduce and horizontal waveform steel The difference of bed die, is steel fiber reinforced concrete 27 (steel fibre diameter in top plate concrete<1cm, content of steel fiber 1～2%), form steel fine Dimension reinforced concrete (SF.RC).

External prestressing steels adopt the steel strand wires of diameter 21.8mm, 9～12, every hole, and it is horizontal that external tendon steering block is arranged on concrete The bottom of dividing plate 16, the principle of design is the dead load amount of deflection eliminating T-shaped combination simply supported beam with prestressing force, makes camber be zero, Do not set camber.

Work progress of the present utility model approximately as：

1. the construction of antinode work beam：After bridge infrastructure completion, steel is set in spanning by the scheme of traffic control Pipe Temporary Piers and erection construction simple rack are to reduce the installation across footpath of antinode work beam.Antinode work beam be prefabricated in the factory after (in ripple Welding plate support on shape steel web), with vehicle carrying to job site, the antinode work beam of monolithic is installed to bridge with truck crane Dock on pier or Temporary Piers, falsework.After closing up again in antinode work beam second line of a couplet plane, welded H section steel is as stull and tiltedly Support.Pour concrete diaphragm plate at abutment bearing (holding diaphragm plate 161), pre-buried external prestressing anchor.Hoisting prefabricated Concrete diaphragm plate (i.e. middle diaphragm plate 162), formwork erection Cast-in-place concrete joint, embedded body between longitudinal Wavelike steel webplate and Prefabricated Concrete diaphragm plate External prestressed steering block.

2. steel concrete combines the construction of top board：After the completion of antinode work beam, first top board setback shape steel plate is welded on waveform steel In the flat board support of web, more horizontal I-steel on antinode work beam top flange plate, dispose People's Bank of China's construction passage, top board can achieve Erection without scaffolding.Vertical construction reinforced bar is welded on I-steel, its lower end is welded on horizontal waveform steel bed die, control steel bed die Deformation.Weld stud on steel bed die, colligation roof steel bar net, pour top board steel after epoxy resin smeared by steel bed die more fine Dimension concrete.

3. the construction of external prestressing：After top plate concrete has reached intensity, in pre-buried good anchor and steering block In wear external prestressing steel strand wires.To control dead load amount of deflection to be zero to carry out prestressed stretch-draw for target, treat that management inspection meets and set After meter requires, anchorage, intermediate plate are fixed, terminate after installing preventer.

Techno-Economic Analysis

This utility model is now chosen three kinds of different structures and is carried out techno-economic comparison (being specifically shown in Table 1).General steel box-girder Article points are conveniently adopted to make in order to lift, every width 4m about, 12m bridge is wide totally 3.Concrete T-type simply supported beam largest span does not surpass Cross 50m and require it is impossible to meet across footpath 60m, if 50m to be exceeded using 3 span continuous box girders and can only use cradle construction.And this reality Combining T-shaped beam with new external prestressing steel concrete adopts article points to construct, every width 4m.

Table 1

Consolidated statement 1 can be learnt：

1. material usage aspect.With steel box-girder ratio, the T-shaped beam rolled steel dosage of combination of the present utility model saves 12%～ 18%；Compared with concrete continuous box girder, concrete amount saves about 40%, and amount of reinforcement saves 50%, and steel strand wires consumption saves 6% ～21%；

2. lift weight aspect.Concrete continuous box girder typically adopts Hanging Basket cantilever pouring, long construction period, disturbs under bridge Greatly it is difficult to meet current requirement under bridge.It is big (100～150t), in local traffic is built very that steel box-girder once lifts weight Difficult satisfaction requires.And the T-shaped beam of combination of the present utility model, entirely across weight than steel box-girder weight, but concrete roof is in antinode work beam Property one-piece casting again after lifting, only need to lift antinode work beam (less than 50t) in construction, if one simple beam of setting Lifting weight is less than 30t, readily satisfies local construction requirement, reduces the requirement to hoisting machinery, to local transport development There is important realistic meaning；

3 cost aspects.The T-shaped beam comprehensive approximate estimate of combination of the present utility model between concrete continuous box girder and steel box-girder, often Square metres 4500～5500, slightly below steel box-girder.Release antinode work beam-steel concrete combination top board-external prestressing and combine T-shaped freely-supported Beam main cause is to reduce the difficulty of 60m Long span simply supported beam lifting and reduce the interference time to traffic under bridge for the construction period.

4. the problem existing and its solution.Because the design that external tendon service life is less than bridge in (20～30 years) makes With the time limit (50 years), must take into after operation and change rope, so the bridge pier (or abutment) at simply supported beam two ends of the present utility model adopts Split type, conveniently external tendon is changed.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this For the technical staff in field, this utility model can have various modifications and variations.All of the present utility model spirit and principle Within, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.

Claims (8)

1. a kind of antinode work beam-steel concrete top board-external prestressing combines T-shaped simply supported beam it is characterised in that including antinode work beam (1), top board (2) and external prestressing tendon (3), described antinode work beam include in i shaped steel structure and three in one setting upper Flange plate (13), Wavelike steel webplate (11) and bottom wing listrium (12), described top flange plate and bottom wing listrium are length direction edge To the steel plate of setting, described Wavelike steel webplate is to be vertically arranged and its wavelength direction equally indulging along simply supported beam to the vertical bridge of simply supported beam To the corrugated sheet steel of setting, the horizontal cross-section of Wavelike steel webplate is in undaform to bridge, and described top board (2) includes horizontal waveform steel bed die With the reinforced concrete pouring thereon, the two collectively forms steel concrete combinative structure, described horizontal waveform steel bed die include under flat Plate support (22) and upper and with flat board support be connected setback shape steel plate (23), its top surface and antinode after reinforcing bar concrete placings Work beam top flange plate (13) flushes or covers antinode work beam top flange plate, and described flat board support (22) includes being respectively fixedly disposed at Wavelike steel webplate (11) plate face both sides and two blocks of plain plates of height identical (221 and 222), described plain plate and waveform steel abdomen The Waveform Matching of plate, and described flat board support (22) and setback shape steel plate (23) are arranged under described top flange plate (13) Side；

Described setback shape steel plate (23) include the upper flat face (231) parallel with top board (2) top surface and under and flat board The inclined plane (232) that support (22) is connected；

It is connected with stull (14) and diagonal brace (15), the top surface of part stull is provided between adjacent two antinode work beam (1) bottoms Concrete diaphragm plate (16), described concrete diaphragm plate include cast-in-place end diaphragm plate (161) at the support position of simply supported beam two ends with And the prefabricated middle diaphragm plate (162) between two bearings, in having poured between middle diaphragm plate and antinode work beam (1) for being connected Concrete diaphragm plate and the concrete joint (17) of Wavelike steel webplate, the side that outermost Wavelike steel webplate (11) does not set middle diaphragm plate is provided with The one-to-one concrete of middle diaphragm plate each with this Wavelike steel webplate opposite side is put more energy into (18), and described concrete joint and concrete are put more energy into highly square It is arranged at upwards between bottom wing listrium (12) and flat board support (22)；

Described external prestressing tendon includes anchor (31), turns to block assembly (32) and external prestressing steels (33), described anchor It is fixedly mounted with to put and is embedded at the tabula Board position of end, described steering block assembly is embedded in the bottom that middle diaphragm plate and its concrete joint, concrete are put more energy into Portion, described external prestressing steels are located in steering block assembly and anchor, and the external prestressing steels after tensioning are used for eliminating The dead load amount of deflection of simply supported beam, makes simply supported beam be not required to the camber being provided for offsetting dead load amount of deflection；

Bridge pier (6) at the bearing of described simply supported beam two ends is split-type structural, and that is, a bridge pier includes two points of bridge piers (61/ 62), leave, between two points of bridge piers, the spacing being conveniently replaceable external prestressing tendon.

2. a kind of antinode work beam-steel concrete top board according to claim 1-external prestressing combines T-shaped simply supported beam, and it is special Levy and be, the Wavelike steel webplate bottom lateral profile being fixed with bottom wing listrium is fish-bellied type structure.

3. a kind of antinode work beam-steel concrete top board according to claim 1-external prestressing combines T-shaped simply supported beam, and it is special Levy and be, the across footpath scope of described simply supported beam is 40～60 meters.

4. a kind of antinode work beam-steel concrete top board according to claim 3-external prestressing combines T-shaped simply supported beam, and it is special Levy and be, between adjacent two diagonal braces (15) and between the stull (14) of adjacent two along simply supported beam indulge bridge to distance be equal to ripple 1～2 times of the single wavelength of shape steel web (11), simply supported beam indulges bridge, and the distance every 6～8 meters is provided with folder in stull (14) upwards Concrete diaphragm plate (16) between adjacent two antinodes work beam (1).

5. a kind of antinode work beam-steel concrete top board according to claim 1-external prestressing combines T-shaped simply supported beam, and it is special Levy and be, described external prestressing steels adopt the steel strand wires of Φ 21.8mm, every hole arranges 9～12 steel strand wires.

6. a kind of antinode work beam-steel concrete top board according to any one in Claims 1 to 5-external prestressing combination T Type simply supported beam is it is characterised in that the reinforced concrete that is cast on horizontal waveform steel bed die is included entirely laterally on waveform steel bed die Steel fibre reinforced concrete, the bar-mat reinforcement (26) in steel fibre reinforced concrete is fixed on horizontal waveform steel bed die by vertical peg (28) On, wherein vertical peg is uniformly equally distributed on the direction setting that flat face (231) is upper and edge is vertical with flat face, vertical peg Top is less than steel concrete top board upper limb (21), and described bar-mat reinforcement (26) includes the two-layer up and down along the setting of top board (2) thickness direction.

7. a kind of antinode work beam-steel concrete top board according to any one in Claims 1 to 5-external prestressing combination T Type simply supported beam is less than 0.5 times it is characterised in that being a segment length at the upper crest of described Wavelike steel webplate (11) and wave trough position Plane at the plane of wavelength, crest and wave trough position is welded with angle steel stiffener (25) with the seam crossing of flat board support (22).

8. a kind of antinode work beam-steel concrete top board according to any one in Claims 1 to 5-external prestressing combination T Type simply supported beam, it is characterised in that the horizontal waveform steel bed die seam crossing of adjacent two top boards (2) is provided with junction steel plate (20), connects Steel plate is fixedly connected with two pieces of horizontal waveform steel bed dies positioned at seam both sides respectively along simply supported beam horizontal direction two ends.