CN203144907U - Large-span dual-layer bailey truss structure - Google Patents

Large-span dual-layer bailey truss structure Download PDF

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Publication number
CN203144907U
CN203144907U CN 201320124398 CN201320124398U CN203144907U CN 203144907 U CN203144907 U CN 203144907U CN 201320124398 CN201320124398 CN 201320124398 CN 201320124398 U CN201320124398 U CN 201320124398U CN 203144907 U CN203144907 U CN 203144907U
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China
Prior art keywords
bailey truss
double
pile foundation
bridge
deck
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Withdrawn - After Issue
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CN 201320124398
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Chinese (zh)
Inventor
钟俊彦
段木子
朱克东
荣辉
陈海英
黄秋莹
朱欣
李志坚
李建明
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GUANGZHOU MUNICIPAL ENGINEERING TESTING Co Ltd
GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
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GUANGZHOU MUNICIPAL ENGINEERING TESTING Co Ltd
GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
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Priority to CN 201320124398 priority Critical patent/CN203144907U/en
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Publication of CN203144907U publication Critical patent/CN203144907U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses a large-span dual-layer bailey truss structure which comprises bridge pile foundations, piers, support system pile foundations, bearing platforms, a dual-layer bailey truss, full space supports and box beams, two edges of the large-span dual-layer bailey truss structure are provided with one bridge pile foundation and one support system pile foundation, the piers are constructed at the upper faces of the bridge pipe foundations, the two bearing platforms are constructed at the upper faces of the support system pile foundations at two edges of the large-span dual-layer bailey truss structure, the dual-layer bailey truss is assembled and placed between the two bearing platforms in a hanging and straddling mode, the full space supports are arranged at the upper portion of the dual-layer bailey truss and between the dual-layer bailey truss and the bridge, and the box beams are placed at the upper portions of the full space supports. According to the large-span dual-layer bailey truss structure, cast-in-place box beam bridge construction can be achieved on an old bridge surface of an old road surface, and the passing requirement of vehicles under the constructed bridge is not influenced, or old buildings are protected.

Description

Large-span double-layer Bailey truss structure
Technical field
The utility model relates to bridge Construction Technology, is specifically related to a kind of large-span double-layer Bailey truss structure.
Background technology
Along with developing rapidly of a large amount of bridge crossings of China, overpass bridge bridge engineering, bridge crossing, overpass bridge cast-in-situ bridge rack form adopt the form of full framing more, but because be subjected to the influence of geographical nature environment and site operation environment, more and more adopted the rack form of Bailey truss, in the engineering of striding the footpath bridge crossing greatly that much can not set up full framing because of ambient influnence, be extensive use of.
But, below construction bridges, there is the bridge floor road surface, and will guarantees vehicle pass-through requirement or protection old building and can't set up the situation of Bailey truss and full hall shore frame on the bridge floor road surface, still there is not solution at present.
The utility model content
The utility model is in order to overcome the deficiency that above prior art exists; a kind of structure large-span double-layer Bailey truss structure cleverly is provided; can be on the old pavement bridge floor cast-in-situ box girder construction bridges, and do not influence vehicle pass-through requirement or protection old building under the construction bridges.
The purpose of this utility model realizes by following technical scheme: this large-span double-layer Bailey truss structure, comprise the bridge pile foundation plinth, bridge pier, the strutting system pile foundation, cushion cap, double-deck Bailey truss, full framing and case beam, both sides all constructed bridge pile foundation plinth and strutting system pile foundation, Bridge Pier Construction is above the bridge pile foundation plinth, two bearing platform constructions are above the strutting system pile foundation on both sides, double-deck Bailey truss lifting is striden and is placed between two cushion caps, between double-deck Bailey truss and the bridge pier, full framing is set up, placing box beam above the full framing in double-deck Bailey truss top.
4 on the every limit of described strutting system pile foundation, the lateral separation is 3.5m, diameter 1.2m, stake top mark height is 35.1m, and the cushion cap absolute altitude is 36.6m, and the degree of depth that the stake tip cutting is gone into cushion cap is 150mm, and the distance of the strutting system pile foundation on both sides is 37.215m.
Scribbling the thick epoxy resin of one deck 2mm above the described cushion cap, lay the thick steel plate of 10mm above the cushion cap, is double-deck Bailey truss above the steel plate.
Connect combination for bolt between the shellfish thunder sheet of described double-deck Bailey truss, have the reinforcement chord member on the double-deck Bailey truss, 5 U-shaped draw-in grooves of full weld welding between following reinforcement chord member and the Bailey truss, many 25a i iron of horizontal parallel welding distribution beam above the top reinforcement chord member, many 16a i iron of parallel longitudinal welding above the 25a i iron distribution beam, full framing is set up on the 16a i iron.
Described full framing is combined by vertical pole, cross bar and bridging, the vertical pole top of full framing is equipped with and is shored, shoring top groove, to place double horizontal steel pipe stupefied greatly, steel pipe is big, and to place the flitch of 100mm * 100mm longitudinally above stupefied little stupefied, the little stupefied top thick wooden form of 18mm of laying of flitch is the case beam above the wooden form.
The job practices of above-mentioned large-span double-layer Bailey truss structure may further comprise the steps:
(1) the bridge pile foundation plinth is the punching castinplace pile, adopts punching stake machine to construct the bridge pier of constructing then; The strutting system pile foundation is bored pile, adopts the pile-driving machine construction drill, transfers reinforcing cage, and concrete perfusion is finished described strutting system pile foundation then, and the pile foundation type of strutting system pile foundation is friction pile;
(2) build template cast cushion cap on the strutting system pile foundation, the material of cushion cap is concrete;
(3) by Force Calculation, determine double-deck Bailey truss lateral arrangement spacing and theory deformation value, with the controlling value as construction;
(4) assemble double-deck Bailey truss, adopt loop wheel machine and crane to cooperate artificial assembling shellfish thunder sheet, be connected by bolt, under lower floor's Bailey truss, install and strengthen chord member, install at the upper strata Bailey truss and strengthen chord member; Lift double-deck Bailey truss, adopt two large-scale cranes that the double-deck Bailey truss after assembling is carried out the layering lifting, the lifting point is the Bailey truss two ends, two wire rope sling end branch two points liftings; At double-deck Bailey truss welding 25 i iron distribution beam and 16 i iron;
(5) set up full framing;
(6) pouring box beam on full framing;
(7) two ends of case beam are stressed in bridge pier, remove full framing and double-deck Bailey truss.
The material of described strutting system pile foundation is the C25 concrete, and the material of cushion cap is the C30 concrete.
In the described step (4), adopt large-scale crane to the concrete hanging method that the double-deck Bailey truss after assembling carries out the layering lifting to be:
At first lift lower floor's Bailey truss, tack support body with wire rope in the suspension centre position during lifting, wire rope sling and support body angle are 45 °~60 °, work to winch to overhead 5~10cm, check whether firm stable of colligation, whether wire rope sling is strained, whether large-scale crane running is normal, and just continue lifting after lower floor's Bailey truss is steady, lifting is carried out straightening with the 8T Chain block to lower floor's Bailey truss after finishing, and then lower floor's Bailey truss installation steel wire wind hawser is fixed;
Lift the upper strata Bailey truss then, tack support body with wire rope in the suspension centre position during lifting, wire rope sling and the support body angle of cut are 45 °~60 °, work to winch to overhead 5~10cm, check whether firm stable of colligation, whether wire rope sling is strained, whether large-scale crane running is normal, and just continue lifting after the upper strata Bailey truss is steady, lifting is carried out straightening with the 8T Chain block to the upper strata Bailey truss after finishing, and then upper strata Bailey truss installation steel wire wind hawser is fixed.
The concrete grammar of removing full framing and double-deck Bailey truss in the described step (7) is:
Remove earlier full framing, when dismantling Bailey truss then, the Bailey truss below the frange plate of blowing out in case beam both sides hangs the level land with two 30T cranes, artificial unloading's burst; The base plate of case beam and the Bailey truss below the web move on to below the frange plate with the Chain block level of two 8T two ends of slinging earlier, the wire rope of mobile overall process 30T crane must be fastened on Bailey truss, hang the level land with two 30T cranes then, artificial unloading's burst.
The utility model has following advantage with respect to prior art:
1, this large-span double-layer Bailey truss structure, adopt the large-scale Bailey truss to stride old bridge as support is vertical, solved the difficult problem that designing requirement can not be set up full framing at old bridge, the bearing capacity of old bridge is limited, can't support the case beam of several kilotons that weigh, also guarantee the requirement that is open to traffic in addition.
2, full framing and double-deck Bailey truss adopt enough big reinforced concrete foundations of rigidity and intensity, and pile foundation adopts the concrete cement castinplace pile, and cushion cap also is employing steel concrete cushion cap, has certain rigidity.
3, Bailey truss improves its resistance to overturning and working security by measures such as suspension centre, welding 25 i iron distribution beam and 16 i iron reasonably are set, and has solved the difficult point of the long poor stability of Bailey truss span; Bailey truss adopts Chain block (iron chains suspension hook) integral translation, and the method under crane integral body is hung is removed, convenient and quick construction.
4, in order to satisfy the large span requirement, guarantee intensity, rigidity and the amount of deflection of Bailey truss, Bailey truss adopts double-deck the reinforcement, and be provided with strengthen chord member, U-shaped draw-in groove guarantees its whole stressed stability.
5, the strutting system pile foundation adopts pile-driving machine to construct, and pile-driving machine is less to peripheral impact force, does not influence peripheral structure, the new and old buildings thing of protection periphery.
6, this job practices stablize feasible, cost is lower, Zhi Dingti is rigidity and good stability, construction speed is fast; mainly be applicable to building and surrounding building under the protection bridge; for example protect the old bridge below the new bridge, do not build shore frame at old bridge case beam, in case press the old bridge that collapses.
Description of drawings
Fig. 1 is the structural representation of large-span double-layer Bailey truss structure of the present utility model.
Fig. 2 is the connection layout of cushion cap and double-deck Bailey truss.
Fig. 3 is structure and the lifting drawing of site of double-deck Bailey truss.
Fig. 4 is the AA sectional drawing of Fig. 1.
Fig. 5 is the structure chart of shoring the position.
Fig. 6 is the cross-sectional view of double-deck Bailey truss.
Fig. 7 is the cross-sectional view of strutting system pile foundation.
The unit of all marks is mm among Fig. 1,3,4,6.
Label and title are as follows among Fig. 1 to Fig. 7:
1 Bridge pier 2 The strutting system pile foundation
3 Cushion cap 4 Double-deck Bailey truss
5 Full framing 6 The case beam
7 Strengthen chord member 8 Steel plate
9 25a i iron distribution beam 10 The 16a i iron
11 Vertical pole 12 Cross bar
13 Bridging 14 Shore
15 Steel pipe is stupefied greatly 16 Flitch is little stupefied
17 Wooden form 18 U-shaped draw-in groove
19 Long vertical muscle 20 Short vertical muscle
21 Spiral hoop 22 The hoop of putting more energy into
23 Frange plate 24 Base plate
25 Web 26 The bridge pile foundation plinth
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As Fig. 1~large-span double-layer Bailey truss structure shown in Figure 7, comprise bridge pile foundation plinth, bridge pier, strutting system pile foundation, cushion cap, double-deck Bailey truss, full framing and case beam, both sides all constructed bridge pile foundation plinth and strutting system pile foundation, Bridge Pier Construction is above the bridge pile foundation plinth, two bearing platform constructions are above the strutting system pile foundation on both sides, double-deck Bailey truss lifting is striden and is placed between two cushion caps, between double-deck Bailey truss and the bridge pier, double-deck Bailey truss top sets up full framing, placing box beam above the full framing.
As shown in Figure 1 and Figure 4, strutting system pile foundation lateral separation is 3.5m, diameter 1.2m, stake top mark height is 35.1m, the cushion cap absolute altitude is 36.6m, the degree of depth that the stake tip cutting is gone into cushion cap is 150mm, 4 on the every limit of bridge pile foundation plinth and strutting system pile foundation, the distance of the strutting system pile foundation on both sides is 37.215m, the bridge pile foundation plinth mainly is that the fixed bridge span of design is 45m, yet the strutting system span is to be determined by field condition, decides according to the building of crossing over.
As shown in Figure 2, scribbling the thick epoxy resin of one deck 2mm above the cushion cap, lay the thick steel plate of 10mm above the cushion cap, is double-deck Bailey truss above the steel plate.
As Fig. 2, Fig. 3 and shown in Figure 4, connect combination for bolt between the shellfish thunder sheet of double-deck Bailey truss, have the reinforcement chord member on the double-deck Bailey truss, 5 U-shaped draw-in grooves of full weld welding between following reinforcement chord member and the Bailey truss, many 25a i iron of horizontal parallel welding distribution beam above the top reinforcement chord member, many 16a i iron of parallel longitudinal welding above the 25a i iron distribution beam, full framing is set up on the 16a i iron.
Bailey truss is laid according to calculating the spacing of determining by many groups shellfish thunder sheet, and every group of frange plate place shellfish thunder sheet is assembled by 2 shellfish thunder sheets and bracing frame, totally 4 groups; Every group of the shellfish thunder sheet at web and base plate place is assembled by 2-3 sheet shellfish thunder sheet and bracing frame, totally 12 groups.All Bailey truss all adopt double-deck form to improve the intensity of support.In order to strengthen the resistance to overturning of Bailey truss, all Bailey truss all adopt fastener to be linked to be integral body.
As shown in Figure 6, double-deck Bailey truss is totally 36 rows, strengthens totally 1008 of chord members, 936 of shellfish thunder sheets.
As Fig. 1, Fig. 4 and shown in Figure 5, full framing is combined by vertical pole, cross bar and bridging, the vertical pole top of full framing is equipped with and is shored, shoring top groove, to place double horizontal steel pipe stupefied greatly, steel pipe is big, and to place the flitch of 100mm * 100mm longitudinally above stupefied little stupefied, the little stupefied top thick wooden form of 18mm of laying of flitch is the case beam above the wooden form.
Full framing adopts fastener type steel pipe scaffold, adopt the thick wooden form of 18mm (in order to strengthen intensity, the place can adopt the 5mm steel form in two arc positions of web outside), the little stupefied spacing of flitch is 300mm, encrypted area spacing 100mm, steel pipe is stupefied greatly to be double φ 48 * 3.5, and spacing is 600mm, encrypted area spacing 300mm.The vertical pole spacing is 600 * 600mm, and the encrypted area spacing is 300 * 600mm, and the cross bar step pitch is 1200mm.Whenever be not less than 4 rows and be not more than the 5m vertical pole, together vertical bridging is set, arranged continuously by the end to top; Height arranges the bridging of one level smaller or equal to the position of 8m; Height arranges the bridging of twice level greater than the position of 8m.All simultaneously bridgings should guarantee 45 °~60 ° angle.Bridging adopts overlapping mode to connect, and lap length is not less than 1m, and 3 rotary buckles of spaced set are fixed, and each bolt of full framing is tightened torsion should be less than 40Nm, and should be greater than 65Nm.
The job practices of above-mentioned large-span double-layer Bailey truss structure may further comprise the steps:
(1) as shown in Figure 7, construction bracket system pile foundation: the bridge pile foundation plinth is the punching castinplace pile, adopts punching stake machine to construct the bridge pier of constructing then; The strutting system pile foundation is bored pile, adopt the pile-driving machine construction drill, consider in the construction to reduce because pile foundation construction produces disturbance to old building foundation, adopt the pile-driving machine construction drill, pile-driving machine is less than normal to old building foundation influence during construction, transfer reinforcing cage, concrete perfusion is finished described strutting system pile foundation then, and the pile foundation type of strutting system pile foundation is friction pile;
(2) finish the front and back ground and handle, build template cast cushion cap on the strutting system pile foundation, the material of cushion cap is concrete; Finish the cushion cap of comparatively robust, basic as whole Zhi Dingti system.
(3) by Force Calculation, determine double-deck Bailey truss lateral arrangement spacing and theory deformation value, with the controlling value as construction;
(4) assemble double-deck Bailey truss, adopt loop wheel machine and crane to cooperate artificial assembling shellfish thunder sheet, be connected by bolt, with trailer Bailey truss is transported to the operating position, carry out assembly unit setting up the position then.At first per 2 and the assembly unit of per 3 shellfish thunder framves are in a row, carry out the individual layer assembly unit by the grouping of design then, and the longitudinal length 39m by Bailey truss is assembled into one group of truss at last.Under lower floor's Bailey truss, install and strengthen chord member, install at the upper strata Bailey truss and strengthen chord member; Lift double-deck Bailey truss, adopt two large-scale cranes that the double-deck Bailey truss after assembling is carried out the layering lifting, the lifting point is the Bailey truss two ends, two wire rope sling end branch two points liftings; At double-deck Bailey truss welding 25 i iron distribution beam and 16 i iron;
The lifting position of shellfish thunder frame is selected for use: suspension centre main span as calculated press a=0.2074L respectively according to the position of broken end, i.e. a=0.2074*39m=8.1m, and the about 8.1m of suspension centre distance of positions shellfish thunder frame head place carries out the value laying according to shellfish thunder frame own characteristic, and suspension centre is seen shown in Figure 3.
(5) set up full framing, wooden form mat formation the order from the centre to around lay;
(6) pouring box beam on full framing;
(7) two ends of case beam are stressed in bridge pier, remove full framing and double-deck Bailey truss.
The case beam is box girder with variable cross section, and the material of strutting system pile foundation is the C25 concrete, and the material of cushion cap is the C30 concrete.
In the described step (4), adopt large-scale crane to the concrete hanging method that the double-deck Bailey truss after assembling carries out the layering lifting to be:
At first lift lower floor's Bailey truss, tack support body with wire rope in the suspension centre position during lifting, wire rope sling and support body angle are 45 °~60 °, work to winch to overhead 5~10cm, check whether firm stable of colligation, whether wire rope sling is strained, whether large-scale crane running is normal, and just continue lifting after lower floor's Bailey truss is steady, lifting is carried out straightening with the 8T Chain block to lower floor's Bailey truss after finishing, and then lower floor's Bailey truss installation steel wire wind hawser is fixed;
Lift the upper strata Bailey truss then, tack support body with wire rope in the suspension centre position during lifting, wire rope sling and the support body angle of cut are 45 °~60 °, work to winch to overhead 5~10cm, check whether firm stable of colligation, whether wire rope sling is strained, whether large-scale crane running is normal, and just continue lifting after the upper strata Bailey truss is steady, lifting is carried out straightening with the 8T Chain block to the upper strata Bailey truss after finishing, and then upper strata Bailey truss installation steel wire wind hawser is fixed.
Large-scale crane adopts the crane of 30T, and the degree of accuracy that keeps the safety of lifting and guarantee to lift to improving rigidity and the stability of Bailey truss integral body, has important effect;
The concrete grammar of removing full framing and double-deck Bailey truss in the described step (7) is:
Remove earlier full framing, when dismantling Bailey truss then, the Bailey truss below the frange plate of blowing out in case beam both sides hangs the level land with two 30T cranes, artificial unloading's burst; The base plate of case beam and the Bailey truss below the web move on to below the frange plate with the Chain block level of two 8T two ends of slinging earlier, the wire rope of mobile overall process 30T crane must be fastened on Bailey truss, hang the level land with two 30T cranes then, artificial unloading's burst.
The above-mentioned specific embodiment is preferred embodiment of the present utility model; can not limit the utility model; other any change that does not deviate from the technical solution of the utility model and make or other equivalent substitute mode are included within the protection domain of the present utility model.

Claims (5)

1. large-span double-layer Bailey truss structure, it is characterized in that: comprise bridge pile foundation plinth, bridge pier, strutting system pile foundation, cushion cap, double-deck Bailey truss, full framing and case beam, both sides all constructed bridge pile foundation plinth and strutting system pile foundation, Bridge Pier Construction is above the bridge pile foundation plinth, two bearing platform constructions are above the strutting system pile foundation on both sides, double-deck Bailey truss lifting is striden and is placed between two cushion caps, between double-deck Bailey truss and the bridge pier, double-deck Bailey truss top sets up full framing, placing box beam above the full framing.
2. large-span double-layer Bailey truss structure according to claim 1, it is characterized in that: 4 on the every limit of described strutting system pile foundation, the lateral separation is 3.5m, diameter 1.2m, stake top mark height is 35.1m, the cushion cap absolute altitude is 36.6m, and the degree of depth that the stake tip cutting is gone into cushion cap is 150mm, and the distance of the strutting system pile foundation on both sides is 37.215m.
3. large-span double-layer Bailey truss structure according to claim 2 is characterized in that: scribbling the thick epoxy resin of one deck 2mm above the described cushion cap, lay the thick steel plate of 10mm above the cushion cap, is double-deck Bailey truss above the steel plate.
4. large-span double-layer Bailey truss structure according to claim 3, it is characterized in that: connect combination for bolt between the shellfish thunder sheet of described double-deck Bailey truss, have the reinforcement chord member on the double-deck Bailey truss, 5 U-shaped draw-in grooves of full weld welding between following reinforcement chord member and the Bailey truss, many 25a i iron of horizontal parallel welding distribution beam above the top reinforcement chord member, many 16a i iron of parallel longitudinal welding above the 25a i iron distribution beam, full framing is set up on the 16a i iron.
5. large-span double-layer Bailey truss structure according to claim 4, it is characterized in that: described full framing is combined by vertical pole, cross bar and bridging, the vertical pole top of full framing is equipped with and is shored, shoring top groove, to place double horizontal steel pipe stupefied greatly, steel pipe is big, and to place the flitch of 100mm * 100mm longitudinally above stupefied little stupefied, the little stupefied top thick wooden form of 18mm of laying of flitch is the case beam above the wooden form.
CN 201320124398 2013-03-18 2013-03-18 Large-span dual-layer bailey truss structure Withdrawn - After Issue CN203144907U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103184722A (en) * 2013-03-18 2013-07-03 广州市市政工程机械施工有限公司 Large-span double-layer Bailey truss structure and construction method thereof
CN110733975A (en) * 2019-10-29 2020-01-31 中建八局轨道交通建设有限公司 dragon hanging combined beam device and mounting method
WO2020103351A1 (en) * 2018-11-21 2020-05-28 中铁十八局集团有限公司 Bailey support system applied to crossed protection of complicated pipe cable and construction method therefor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103184722A (en) * 2013-03-18 2013-07-03 广州市市政工程机械施工有限公司 Large-span double-layer Bailey truss structure and construction method thereof
CN103184722B (en) * 2013-03-18 2015-01-28 广州市市政工程机械施工有限公司 Large-span double-layer Bailey truss structure and construction method thereof
WO2020103351A1 (en) * 2018-11-21 2020-05-28 中铁十八局集团有限公司 Bailey support system applied to crossed protection of complicated pipe cable and construction method therefor
CN110733975A (en) * 2019-10-29 2020-01-31 中建八局轨道交通建设有限公司 dragon hanging combined beam device and mounting method
CN110733975B (en) * 2019-10-29 2020-11-06 中建八局轨道交通建设有限公司 Gantry crane combined beam device and installation method

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Granted publication date: 20130821

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