CN211645937U - Lightweight bridge ETC plane truss structure - Google Patents
Lightweight bridge ETC plane truss structure Download PDFInfo
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- CN211645937U CN211645937U CN201921497278.9U CN201921497278U CN211645937U CN 211645937 U CN211645937 U CN 211645937U CN 201921497278 U CN201921497278 U CN 201921497278U CN 211645937 U CN211645937 U CN 211645937U
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Abstract
The utility model discloses a lightweight bridge ETC plane truss structure, which comprises a pair of upright posts arranged at the top of a bridge, a pair of upper chord and lower chord which are arranged between the upright posts in parallel, and a support rod connected between the upper chord and the lower chord; the upright post, the upper chord, the lower chord and the support rod are positioned on the same plane; the welding has the mounting that extends to the place ahead on the upper chord, is connected with the manual work platform between the bottom of mounting and the lower chord for the workman carries out the installation and debugging of ETC equipment. The utility model discloses a set up in the cat ladder of middle zone side stand about being convenient for installer, utilize the fixed work platform (grid board) of going up of type of falling L bracing, realize single-column unilateral manual platform formula lightweight bridge ETC plane truss structure, thereby solve super large stride footpath, the lightweight subtracts heavy, reduce the bridge influence, make full use of lightweight, reasonable, economy, satisfy the spatial structure that ETC reformed transform needs, the portal economy, to bridge injury and influence reduce to minimum, 14 grades of typhoon resistance demand.
Description
Technical Field
The utility model relates to a technical field of toll station bridge especially relates to a lightweight bridge ETC plane truss structure, is applicable to cancellation nationwide and saves bridge section portal lightweight structure in the toll station.
Background
With the rapid development of the traffic cause in 2019, two levels of national management levels of State academy and department of transportation release related innovation measures of ' reform and cancel highway provincial toll stations ' about deepening toll road system ', and with the continuous advancement of the innovation, various ETC truss structures are continuously built under the large environment that the design and construction technology of highway provincial toll stations is continuously advanced. Quantity, the ETC portal of a great variety are all unified to bridge section truss structural design understanding, step, structural style, whether can produce the injury to former project bridge in the design, or whether install the ETC charge truss again after having had the injury and can carry out secondary damage to the bridge and must carefully consider.
The collapse of the bridge girder is a small probability event, but once the collapse occurs, the collapse can cause painful casualties and huge economic loss. With the advance of national cancellation of provincial toll stations and the development of subsequent projects, more and more ETC truss structures are built and put into use, and the safety of bridges and ETC trusses is increasingly emphasized.
The design of reducing bridge load, reducing self weight of the truss, simplifying construction difficulty and the like has certain particularity. Firstly, the load of the bridge can be reduced; secondly, the bridge damage is avoided; thirdly, light weight and high strength; fourthly, typhoon resistance is achieved; fifthly, people can get on the device to work; sixth, the construction is fast and convenient; seventh, the cost is economical.
At present, the more common ETC truss structure is a large three-dimensional truss structure system, double-column type stand columns are adopted, double-row chord tube support and vertical and oblique web member support systems, in order to ensure that the portal structure system is stable, many designs tend to be conservative, the stand columns, chord members, bolt connection groups and other components are strengthened by multiple times in the design, so that the construction cost of a single truss structure is directly caused, the dead weight is exponentially increased, materials are wasted, the construction cost is not economical, in order to respond to national greening roads, policy calls such as energy conservation and emission reduction are made, the material consumption in the portal design is reduced as much as possible, the damage and secondary damage to the bridge are avoided, and the integral stability strength is ensured to be carried out in advance.
In conclusion, the bridge ETC portal has the characteristics and special requirements which are different from those of a common conventional road section, and in a relatively narrow and closed bridge environment, the bridge ETC portal has various limited setting conditions, so that drivers and passengers and bridges are greatly damaged and threatened if any problem occurs.
The lightweight bridge ETC portal frame is one of development directions of related reform measures related to the reformation of deepened toll road system and the cancellation of expressway provincial toll stations; super large span, lightweight subtract heavy, reduce bridge influence, reasonable structural arrangement are the development trend of bridge ETC portal. Therefore, the lightweight technology of the ETC portal of the bridge is integrated and developed, and optimization and improvement are carried out so as to be suitable for solving the problem that the construction of a highway provincial toll station is urgently needed.
SUMMERY OF THE UTILITY MODEL
Based on the not enough that above-mentioned prior art exists, the utility model aims to solve the technical problem that a lightweight bridge ETC plane truss structure is provided, simple structure is reasonable, and the construction is convenient, satisfies the spatial structure that ETC reformed transform needs, and the portal economy reduces to the minimum to bridge injury and influence.
In order to achieve the purpose, the utility model provides a lightweight bridge ETC plane truss structure, which comprises a pair of upright posts arranged at the top of a bridge, a pair of upper chord and lower chord which are arranged between the upright posts in parallel, and a support rod connected between the upper chord and the lower chord; the upright post, the upper chord, the lower chord and the support rod are positioned on the same plane; go up the welding and have the mounting that extends to the place ahead on the chord, be connected with the manual work platform between the bottom of mounting and the lower chord for the workman carries out the installation and debugging of ETC equipment.
Preferably, the support rod comprises a vertical support perpendicular to the upper chord and the lower chord, and an inclined support alternately connected with the vertical support and obliquely arranged between the upper chord and the lower chord.
Furthermore, the fixing piece is an inverted L-shaped inclined strut, and is welded with the upper chord member to form an integral truss girder with a plane truss structure consisting of the upright post, the upper chord member, the lower chord member and the support rod in a dowel bar mode.
Optionally, the upper manual work platform is a grating plate. The stand is gone up along the length direction welding of stand and is had people's inspection and repair cat ladder.
Furthermore, two ends of each inclined strut are respectively connected with the top of one adjacent vertical strut and the bottom of the other adjacent vertical strut, and form a triangular structure together with the chord.
Preferably, the upright posts are connected with the upper chord and the lower chord through high-strength bolts. The vertical braces and the inclined braces are connected with the upper chord and the lower chord in a welding mode.
Optionally, the inverted L-shaped inclined strut is composed of a horizontal support rod connected with the upper chord and a vertical strut rod connected with the horizontal support rod; the size specification of the horizontal supporting rod and the vertical supporting rod is 32x2.5 to 114x8 mm. The dimension specification of the upright post is 140x 4.5-377 x16 mm; the upper chord and the lower chord have a size specification of 102x4 to 245x16 mm; the vertical support and the diagonal support have the size specification of 32x2.5 to 114x8 mm; the upper people inspection and repair ladder stand is formed by processing a 32x2.5 steel pipe or a No. 12 plain round steel bar.
The utility model discloses with the material materials in the design of the as far as possible alleviate portal, avoid causing injury and secondary injury, assurance overall stability intensity to the bridge for going on in advance, compare with prior art, the beneficial effects of the utility model and the advantage lie in:
1. the utility model discloses a lightweight bridge ETC plane truss has solved the technological problem that internal full section bridge section truss structure adopted lightweight design, and the present internal truss structure system all exceeds corresponding required intensity, all tends to conservatively in the design, and uneconomic cost is on the high side, and the material is too big.
2. The utility model discloses a lightweight bridge ETC plane truss has solved at present internally because the ETC portal is overweight, leads to the difficult problem that the bridge design degree of difficulty increases, because intensity is too big, weight increases relatively, and domestic all truss structures have been built at present are all heavier, becomes exponential increase to the bridge flange plate design degree of difficulty simultaneously, increases the emergence probability of bridge injury, because carried out structural optimization by a wide margin and subtract heavy, go on within bridge structural design safety range, belong to steerable scope.
3. The utility model discloses a lightweight bridge ETC plane truss has solved the typhoon district because truss structure member is more, receives the typhoon cross-section to increase, and the anti-wind performance who leads to weakens the condition, has further optimized the fluid and has calculated the upper and lower chord member overall arrangement of truss, has carried out whole adjustments and has made the cross-section that receives the wind diminish, can resist 55 ms wind pressure.
4. The utility model discloses a lightweight bridge ETC plane truss compares with prior art, lower cost (only for half of current portal), structural strength stability safety, solved bridge flange board department receive the truss dead weight influence the great problem that produces the bridge injury easily.
Drawings
Fig. 1 is the utility model discloses preferred embodiment's lightweight bridge ETC plane truss structure's schematic perspective view.
Fig. 2 is the utility model discloses a lightweight bridge ETC plane truss structure's schematic structure diagram.
Fig. 3 is a side view of fig. 2.
Wherein: the ladder comprises 1-upright posts, 2-upper and lower chords, 21-upper chords, 22-lower chords, 3-vertical braces, 4-inclined braces, 5-fixing pieces, 6-upper manual work platforms and 7-upper personnel overhaul ladders.
Detailed Description
Examples
The communication department of 9.18.2018 promulgates a file for unifying national over-limit overload standard, and specifies the requirement that the designed load of the bridge is limited to 49T at most, the regulation strictly requires the design value of the weight limit standard of the bridge, the most strict whole-vehicle networking project to be implemented in 2020 is laid, the lightweight truss structure is imperative, and the importance of the ETC plane truss structure of the lightweight bridge is imperative. The utility model discloses a lightweight bridge ETC plane truss compare and built actual weight in 49 batch projects of whole engineering, and average weight is 9.832 tons.
The lightweight bridge ETC planar truss structure of the present invention will be described in detail with reference to fig. 1 to 3.
As shown in fig. 1-3, the utility model provides a lightweight bridge ETC plane truss structure, including stand 1, upper and lower chord 2, erector strut 3, bracing 4, mounting 5, go up artifical work platform 6, go up people and overhaul cat ladder 7, wherein, upper and lower chord 2 includes parallel arrangement upper chord 21 and lower chord 22 between two stands 1. The vertical braces 3 are perpendicular to the upper chord 21 and the lower chord 22, the inclined braces 4 are alternately connected with the vertical braces 3 and obliquely arranged between the upper chord 21 and the lower chord 22, and the vertical braces 3 and the inclined braces 4 form a support rod and are positioned on the same plane as the upright column 1, the upper chord 21 and the lower chord 22. The two ends of each inclined strut 4 are respectively connected with the top of one adjacent vertical strut 3 and the bottom of the other adjacent vertical strut 3, and form a triangular structure together with the chord members, so that the overall strength of the plane truss structure can be enhanced. The mounting 5 sets up outside the plane that comprises stand 1, upper chord 21, lower chord 22 and bracing piece to extend to the place ahead, mounting 5 for the type of falling L bracing and with upper chord 21 welds, goes up artifical platform 6 and connects between the bottom of the type of falling L bracing and lower chord 22, go up artifical platform 6 and can adopt the grid plate. The climbing ladder 7 for inspection and repair of the upper person is welded on the upright post 1 and ascends along the length direction of the upright post 1.
When the upright post 1 is arranged at the top of the bridge guardrail, the dead weight of the truss structure easily causes larger load to the flange plate of the bridge, and the damage conditions such as cracking easily occur, the lightweight truss structure of the utility model greatly reduces the weight of the truss structure and optimizes the structural part while further ensuring the safety of the truss structure and the economic and reasonable material arrangement, the upright post 1 is connected with the upper chord 2 and the lower chord 2 by adopting high-strength bolt groups, the vertical brace 3 and the diagonal brace 4 are welded with the upper chord 2 and the lower chord 2 (the welding line grade adopts one level), the three-dimensional upright post truss structure is optimized into a plane truss structure, the whole weight can be reduced to more than 50 percent, the inverted L-shaped diagonal brace is welded with the upper chord 21 and forms an integral truss beam with the plane truss structure consisting of the upright post 1, the upper chord 21, the lower chord 22 and the support rods, the inverted L-shaped diagonal brace consists of a horizontal support rod and a vertical brace, go up manual work platform 6 and fixedly build by horizontal support pole and vertical strut montant to be connected with the chord member welding, lay manual work platform 6 between vertical strut montant and lower chord member 22, last people's overhaul cat ladder 7 and stand 1 of central authorities ' median stand side adopt the welding mode to be connected, it only needs to climb to last people's overhaul cat ladder 7 back and supreme manual work platform 6 on the stand 1 through bridge median strip concrete barrier when workman installs ETC equipment, can carry out the installation and debugging of ETC equipment.
In addition, the specific dimension specification of the upright post 1 of the utility model can be 140x4.5 to 377x16mm, and the structure accounting adjustment can be carried out according to different spans; the specific dimension specification of the upper chord 2 and the lower chord 2 can be 102x4 to 245x16mm, and the structure accounting adjustment can be carried out according to different spans; the specific dimension specification of the vertical support 3 can be 32x2.5 to 114x8mm, and the structure accounting adjustment can be carried out according to different spans; the concrete dimension specification of the inclined strut 4 can be 32x2.5 to 114x8mm, and the structure accounting adjustment can be carried out according to different spans; the specific size specification of the horizontal supporting rod and the vertical supporting rod can be 32x 2.5-114 x8mm, and the structure can be adjusted according to different spans; the climbing ladder 7 for inspection and repair of the upper part of the house can be formed by secondary processing of a 32x2.5mm steel pipe or a No. 12 plain round steel bar according to the situation; the specific size of the upper manual working platform 6 can be adjusted to 80-150cm, the height between the upper manual working platform 6 and the horizontal support rod can be adjusted to 100-200cm, and the space and the safety of operators are fully guaranteed.
Through the technical measures, the ETC truss structure has the advantages of full section, standardization in the full life cycle, light weight, reasonable structure, economic cost and space structure meeting the national ETC truss transformation requirements, and the damage and influence to the bridge are reduced to the minimum.
Because the ETC truss adopts after the lightweight, the concrete guardrail top fulcrum counter-force that links to each other with the stand is 79kN at the utmost, because the utility model discloses a portal (plane truss structure) is lighter, can set up in bridge section optional position and need not to consider whether set up in pier department or stride well department, also need not to consider when traditional truss structure arranges bridge department in, must place in bridge pier department to reduce the bridge and stride the bridge injury problem that the biggest department of moment of flexure received the great arouse of counter-force of truss dead weight under the influence with the wind-load.
Compare than traditional truss, because traditional truss adopts two column structures, work platform arranges in between the stand of both sides, and the installer is gone up to the platform after the operation space is narrow during the installation electromechanical device of work, has produced certain hidden danger for installation and safety, and the utility model discloses an ETC truss adopts at first uses single-column side direction mounting platform formula in the trade, gives the abundant space of operation personnel, the equipment fixing of being convenient for.
The typhoon district is because traditional truss structure member is more, receives the typhoon cross-section to increase, leads to the anti-wind performance condition of weakening, the coefficient of keeping out the wind increases, to in typhoon district bridge section truss, the coefficient of keeping out the wind is because great, wind load will be big for truss structure, shear force to concrete guardrail top production will be big, and the moment of flexure that upper portion produced is big, it can be big to produce unfavorable load to bridge flange board, the injury that produces in full life design cycle and the injury possibility of bridge will increase, the utility model discloses an ETC plane truss has at first adopted anti-typhoon fluid analysis in industry, optimizes the coefficient of keeping out the wind under the whole typhoon operating mode of reduction, guarantees that the area of receiving the wind reaches minimumly to adopt fretwork upper portion space design, reduce the area of receiving the wind of whole portal, can resist 15 grades of typhoons.
The utility model discloses a lightweight bridge ETC plane truss structure is applicable to the full section design of bridge, include: the cross section of each of the four bidirectional lanes is 24 meters, the six bidirectional lanes is 32 meters, and the eight bidirectional lanes is 42 meters; the total weight of the light-weight bridge ETC plane truss structure of the utility model is only 4.4 tons (four lanes), 5.7 tons (six lanes) and 5.9 tons (eight lanes), while the total weight of the conventional three-dimensional truss structure exceeds 12 tons;
the bridge ETC plane truss of the utility model can resist 55m/s wind speed, and the wind receiving surface is positive wind speed; this bridge ETC plane truss's stand column base counter-force is less than 80KN, reduces to minimumly to bridge flange board and bridge railing influence.
The utility model discloses a set up in the cat ladder of middle zone side stand about being convenient for installer, utilize the fixed work platform (grid board) of going up of type of falling L bracing, realize single-column unilateral manual platform formula lightweight bridge ETC plane truss structure, thereby solve super large stride footpath, the lightweight subtracts heavy, reduce the bridge influence, make full use of lightweight, reasonable, economy, satisfy the spatial structure that ETC reformed transform needs, the portal economy, to bridge injury and influence reduce to minimum, 14 grades of typhoon resistance demand. The utility model discloses simple structure, the construction is convenient, is suitable for full section, full life cycle inner bridge section cancellation highway province charge station and standard design lightweight bridge ETC portal in the future design project, make full use of lightweight, rational in infrastructure, cost economy, satisfy the spatial structure that ETC reformed transform needs, the portal economy reduces to the minimum to bridge injury and influence, rational in infrastructure.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can understand that the changes or substitutions obtained within the technical scope of the present invention should be covered within the scope of the present invention.
Claims (9)
1. A lightweight bridge ETC plane truss structure is characterized by comprising a pair of stand columns arranged at the top of a bridge, a pair of upper chord and lower chord which are positioned between the stand columns and arranged in parallel, and a support rod connected between the upper chord and the lower chord; the upright post, the upper chord, the lower chord and the support rod are positioned on the same plane; go up the welding and have the mounting that extends to the place ahead on the chord, be connected with the manual work platform between the bottom of mounting and the lower chord for the workman carries out the installation and debugging of ETC equipment.
2. The lightweight bridge ETC planar truss structure according to claim 1, wherein the support rods include vertical braces perpendicular to and inclined braces alternately connected to the vertical braces and obliquely disposed between the upper chord and the lower chord.
3. The lightweight bridge ETC planar truss structure of claim 1, wherein the mounts are inverted L-shaped braces welded to the upper chords to form an integral truss beam with the planar truss structure of columns, upper chords, lower chords and support struts in the form of dowel bars.
4. The lightweight bridge ETC planar truss structure of claim 1 or 3, wherein the upper workplatform is a grating plate.
5. The lightweight bridge ETC planar truss structure of claim 1, wherein a manned access ladder is welded to said columns along the length of the columns.
6. The lightweight bridge ETC planar truss structure according to claim 2, wherein each brace is connected at each end to the top of an adjacent one of the vertical braces and to the bottom of another adjacent vertical brace, and forms a triangular structure with the chords.
7. The lightweight bridge ETC planar truss structure according to claim 1, wherein the columns are connected with the upper chord and the lower chord by high-strength bolts.
8. The lightweight bridge ETC planar truss structure according to claim 2, wherein the vertical braces and the diagonal braces are connected with the upper chord and the lower chord in a welding manner.
9. The lightweight bridge ETC planar truss structure according to claim 3, wherein the inverted L-shaped diagonal brace is composed of a horizontal support bar connected with the upper chord and a vertical brace rod connected with the horizontal support bar; the size specification of the horizontal supporting rod and the vertical supporting rod is 32x2.5 to 114x8 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110565505A (en) * | 2019-09-10 | 2019-12-13 | 武汉中交交通工程有限责任公司 | Lightweight bridge ETC plane truss structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565505A (en) * | 2019-09-10 | 2019-12-13 | 武汉中交交通工程有限责任公司 | Lightweight bridge ETC plane truss structure |
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