CN1737267A - Walking type box beam bridge formation machine - Google Patents
Walking type box beam bridge formation machine Download PDFInfo
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- CN1737267A CN1737267A CN 200510019421 CN200510019421A CN1737267A CN 1737267 A CN1737267 A CN 1737267A CN 200510019421 CN200510019421 CN 200510019421 CN 200510019421 A CN200510019421 A CN 200510019421A CN 1737267 A CN1737267 A CN 1737267A
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- trolley
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Abstract
This invention discloses a walking box girder bridge formation, which relates to a special construction device that spans the large box girder in the railroading project. The structure in this invention as follows: the number one pole 1, the number two pole 4, the number three pole 8 are arranged at the front part, the middle part, the end part of the machine arm 3 respectively to support the machine arm 3; the number one pole 1, the number two pole 4, the number three pole 8 are connected to the number one pole hydraulic system 2, the number two pole hydraulic system 5 and the number three hydraulic system 9; the lifting drolly 6 is arranged on the supporting machine arm 3 and connected with its hydraulic system 7. This invention is mainly applied in the 900 ton box girder spanning in the high speed railroad and the passenger transport special road, and it can span 32 meter, 24 meter, 20 meter crewel spanning box girder and its composed changeable spanning box girder.
Description
Technical field
The present invention relates to set up in a kind of railway construction engineering the special construction apparatus of large-scale box type beam, be mainly used in 900 tonnes of box beam erections in high-speed railway, the Line for Passenger Transportation, can set up 32 meters, 24 meters, 20 meters two-wires etc. stride the case beam and wherein arbitrarily the change of span combination stride the case beam.
Background technology
Recently, China starts the construction of the new upsurge of railway construction, particularly high-speed railway, Line for Passenger Transportation.Estimating that country will invest 2,000,000,000,000 RMB within the next two decades is used for railway construction, thereby fortune frame, installation apparatus are had huge demand; Tonnage, automaticity, maintaining, security reliability, complete machine performance to lifting are also had higher requirement.In China, the railway bridge erecting machine of existing various types, various tonnages can be divided into T beam and box beam bridge formation machine two big classes.Maximum crane capacity is 600 tons.From structural shape, can be divided into step type, following nose girder formula, integration of transporting and building formula and assembling type bridge-errecting machine.
Develop a cover and be applied to 900 tonnes of box beam erections in high-speed railway, the Line for Passenger Transportation, can set up 32 meters, 24 meters, 20 meters two-wires etc. stride the case beam and wherein arbitrarily the change of span combination stride the case beam, and the automaticity height, the complete machine performance is good, construction safety reliable, on-site maintenance easy maintenance, good environmental protection, equipment economical and practical, that efficient is high are particularly necessary.
Summary of the invention
Purpose of the present invention is exactly at above-mentioned present situation, and a kind of walking type box beam bridge formation machine (being called for short the bridge formation machine) is provided.This bridge formation machine is that a kind of being applied to set up 900 tonnes of case beams in high-speed railway, the Line for Passenger Transportation, and automaticity height, complete machine performance are good, construction safety is reliable, on-site maintenance easy maintenance, good environmental protection, economical and practical, special equipment that efficient is high.
The object of the present invention is achieved like this:
As Fig. 1, the present invention is made up of post 1, post hydraulic system 2, horn 3, No. two posts 4, No. two post hydraulic systems 5, trolley 6, trolley hydraulic system 7, No. three posts 8, No. three post hydraulic systems 9;
Its position and annexation are: the front end below horn 3, middle part, afterbody are respectively arranged with the post 1 that supports horn 3, No. two posts 4, No. three posts 8; Post 1, No. two posts 4 and No. three posts 8 are connected with No. three post hydraulic systems 9 with post hydraulic system 2, No. two post hydraulic systems 5 respectively; Be provided with trolley 6 above support horn 3, trolley 6 is connected with trolley hydraulic system 7;
No. two posts 4, No. three posts 8 are fixedlyed connected with horn 3, and post 1 and horn 3 are for fixedly to be hinged.
The traveling wheels of No. two posts 4 and the traveling wheels of No. three posts 8 are formed the walking system, realize the complete machine traveling.
Operating principle of the present invention is:
Lifting beam machine dress beam, rubber-tyred Beam transportation vehicle fortune beam is to afterbody feeding beam of the present invention; Lifting of the present invention is dilatory gets beam, strides a hole and sets a roof beam in place, and rubber-tyred walking via hole can set up that 32m, 24m, 20m two-wire etc. are striden the case beam and beam is striden in change.The relative horns of No. two posts of the present invention 4, No. three posts 83 are fixing, by the bearing position of a post 1 of conversion, can adapt to setting up of high-speed railway bridge unequal span case beam.Trolley 6 is positioned at when getting beam near No. two posts 4, takes the dilatory mode of lifting to get beam.The present invention adopts hydraulic-driven rubber-tyred walking vertical shift by integrated design, and trolley 6 liftings are dilatory gets beam, strides the operating type of setting a roof beam in place in a hole; Less important work is few, and labor strength is low, and the theory speed of setting a roof beam in place is 3 hours/hole; After the present invention got beam, Beam transportation vehicle can withdraw from, and set a roof beam in place, transported the beam operation and carry out synchronously, improved efficiency of construction.The present invention both had been fit to the bridge construction of growing up, and also was fit to medium and small bridge construction, and it is easy that mistake is striden operation, can set up easily to become and stride beam bridge, and the building site is shifted and packed by Beam transportation vehicle.Do not need to carry out entrucking, unload, carry out the building site rapidly and shift by crane gear; The present invention can set up 20m, 24m, 32m etc. stride Liang Jibian and stride beam, and can conveniently set up the first hole and the last Kong Liang of a bridge.
The present invention adopts rubber-tyred hydraulic-driven traveling via hole system first, does not need to lay the vertical shift track, and less important work is few, and the workman hangs down labour intensity; The via hole operation is simple and direct, safe and reliable.
The present invention is put into production, is about to be used for the construction of Line for Passenger Transportation, has following main feature:
1, the complete machine performance is good;
2, construction safety, convenience, reliable, the efficient height, maintaining is convenient;
3, maneuverability, applied widely.
Description of drawings
Fig. 1-structural representation of the present invention;
A Fig. 2-rod structure schematic diagram;
The holding state schematic diagram of Fig. 3-No. one post when the case beam of the non-last hole of frame;
The holding state schematic diagram of Fig. 4-No. one post when the case beam of hole, frame end;
Fig. 5 A-No. two rod structure front view;
Fig. 5 B-No. two rod structure left view;
Fig. 6 A-No. three rod structure front view;
Fig. 6 B-No. three rod structure left view;
The narrow formula of Fig. 7 A-No. three post supports schematic diagram;
The wide formula of Fig. 7 B-No. three post supports schematic diagram;
Fig. 8 A-No. three post traveling tire turns to schematic diagram;
Fig. 8 B-No. three post hangs the balancer schematic diagram;
Fig. 9-horn structural representation;
Figure 10 A-trolley structural front view;
Figure 10 B-trolley structure left view.
Wherein:
1-number post;
101-suspension running gear; 102-basic post; 103-fold mechanism;
104-folding post; 105-telescopic mast;
2---number post hydraulic system;
3---horn;
301-the first crossbeam; 302-girder; 3021-trolley walking rails;
3022-trolley guide rail; 3023-number post traveling ear beam 303-the second crossbeam;
4-No. two posts;
401-door frame; 402-door frame lower transverse beam; 403-traveling wheels;
404-hydraulic lifting supporting leg;
5-No. two post hydraulic systems;
6-trolley;
601-running truck; 602-running mechanism; 603-big vehicle frame;
604-hoisting mechanism; 605-traversing chassis; 606-balancer;
6011-bogie frame; 6012-traveling weight movement device; 6041-hoist engine hoists;
6042-rope winding jib; 6043-fixed pulley group; 6044-running block;
607-Traverse Displacement Unit;
7-trolley hydraulic system;
8-No. three posts;
801-lifting column; 802-fold mechanism; 803-running mechanism;
804-hydraulic suspension balancer;
8041-telescopic arm; 8042-support arm; 8043-connecting rod;
805-steering mechanism;
9-No. three post hydraulic systems.
The specific embodiment
Describe in detail below in conjunction with accompanying drawing.
1, post 1
As Fig. 2, Fig. 3, Fig. 4, No. one post 1 is made up of the suspension traveling wheels 101 that are arranged in order from top to bottom and are connected, basic post 102, fold mechanism 103, folding post 104 and telescopic mast 105;
Described traveling wheels 101 are suspended on the combination of each two driving wheel about horn 3 belows;
Described basic post 102 is a kind of glyph framework;
Described fold mechanism 103 is a kind of stretching devices that connect basic post 102 and folding post 104;
Described folding post 104 is a kind of support columns;
Described telescopic mast 105 be a kind of can be in basic post 102 and the support column that stretches in the folding post 104.
The operating principle of a post 1 is:
A post 1 is a front leg strut of the present invention, and its cylinder design becomes foldable, is supported on the pier first half bearing pad stone of the place ahead, has three permanent positions can satisfy setting up of three kinds of different spans case beams with horn 3; When setting a roof beam in place operation, No. one post 1 vertically is fixed into articulated structure with horn 3, becomes flexible leg.
2, No. two posts 4
As Fig. 5 A, Fig. 5 B, No. two post 4 is made up of door frame 401, door frame lower transverse beam 402, traveling wheels 403, hydraulic lifting supporting leg 404; Door frame 401 and door frame lower transverse beam 402 are formed " 0 " shape portal-framed structure; Be provided with traveling wheels 403 and hydraulic lifting supporting leg 404 below the door frame lower transverse beam 402;
Described door frame 401 is a kind of shape of a hoof frameworks;
Described door frame lower transverse beam 402 is a kind of straight line hollow box beams;
Described traveling wheels 403 are a kind of traveling wheels that support door frame lower transverse beam 402, and this takes turns two rows about component, and every row divides two groups of front and back, and every group is provided with 6-8 driving wheel;
Described hydraulic lifting supporting leg 404 is a kind of telescopic support columns by hydraulic control.
The operating principle of No. two posts 4 is:
No. two post 4 is positioned at horn 3 middle parts, and is fixed with horn 3, is rigid leg of the present invention.Door frame 401 is supporting frames of No. two posts, and its top adopts shape of a saddle horizontal-associate to connect, and not only improves the horizontal coupling stiffness between horn and the transverse integral of complete machine, and guarantees the current smoothly of trolley 6; Door frame lower transverse beam 402 is provided with two hydraulic lifting supporting legs 404, support conversion when realizing that the present invention walks and stable support requirement when setting a roof beam in place operation.
Traveling wheels 403 are provided with the hydraulic suspension balancer, guarantee each tire sets balance carrying; And can make each wheels can adapt to the situation of the horizontal open roof of high-speed railway circuit, avoid local overload;
This hydraulic suspension balancer, its structure and operating principle are with the hydraulic suspension balancer 804 of No. three posts 8.
3, No. three posts 8
As Fig. 6 A, Fig. 6 B, Fig. 7 A, Fig. 7 B, Fig. 8 A, Fig. 8 B, No. three post 8 is made up of lifting column 801, fold mechanism 802, running mechanism 803, hydraulic suspension balancer 804 and steering mechanism 805.From top to bottom, lifting column 801, fold mechanism 802, running mechanism 803 are arranged in order and are connected; In running mechanism 803, be provided with hydraulic suspension balancer 804 and steering mechanism 805;
Described lifting column 801 is frameworks of " 0 " font;
Described fold mechanism 802 is a kind of stretching devices that connect lifting column 801 and running mechanism 803;
Described running mechanism 803 is a kind of running mechanisms of 801 that support, two rows about this mechanism divides, and every row divides two groups of front and back, and every group is provided with four driving wheels;
Described hydraulic suspension balancer 804, as Fig. 8 B, a kind of triangle balancer of forming by telescopic arm 8041, support arm 8042 and connecting rod 8043;
Described steering mechanism 805 is a kind of link gears of being made up of connecting rod and oil cylinder.
The operating principle of No. three posts 8 is:
No. three posts 8 are that vertical shift of the present invention drives pillar.Lifting column 801, fold mechanism 802 make No. three posts 8 have two kinds to support station---and narrow formula supports (seeing Fig. 7 A) and wide formula supports (seeing Fig. 7 B); During the feeding beam operation, No. three posts 8 promote the wide formula of also outer pendulum running mechanism 803 formation of supporting leg and support; During vertical shift operation of the present invention, No. three posts 8 inwardly swing running mechanisms 803 also are supported on case web top, form narrow formula and support, and the running mechanism 803 of No. three posts 8 drives the present invention's vertical shifts forward.Hydraulic suspension balancer 804 designs by different road conditions for running mechanism 803, and this device can be done vertical compensation to running mechanism 803, and makes each driving wheel stand under load equilibrium; The wheel shaft of traveling simultaneously can laterally be swung in right amount, to adapt to circuit horizontal wall inscription situation.Steering mechanism 805 is according to running mechanism 803 structural arrangement forms, adopts the steering mode (seeing Fig. 8 A) of deflection running mechanism 803, and corresponding different turning radius have different separately steering angles; And four traveling wheels between every group link to each other by connecting rod, turn to oil cylinder to promote realization by one and turn to, identical steering angle is arranged.
4, trolley 6
As Figure 10 A, Figure 10 B, trolley 6 is made up of running truck 601, running mechanism 602, big vehicle frame 603, hoisting mechanism 604, traversing chassis 605, balancer 606, Traverse Displacement Unit 607;
Its position and annexation are:
Four jiaos of big vehicle frame 603 are supported by four running trucks 601, and each fixes a running mechanism 602 big vehicle frame 603 the right and lefts; Be placed with traversing chassis 605 on the big vehicle frame 603, and connect by Traverse Displacement Unit 607; Hoisting mechanism 604, balancer 606 are fixed on the traversing chassis 605.
Described running truck 601 is made up of bogie frame 6011 (framework) and weight movement device 6012 (outsourcing piece).
Described running mechanism 602 (outsourcing piece) is made up of the hydraulic motor, planet-gear speed reducer, driving box and the chain that connect successively.
Described big vehicle frame 603 is a kind of recessed formula plane frame structures of being made up of two girders and two butt beams.
Described hoisting mechanism 604 is made up of the hoist engine 6041 that hoists, rope winding jib 6042, fixed pulley group 6043 and running block 6044.
Described traversing chassis 605 is made up of rectangle case beam framework and the weight movement device (outsourcing piece) below it.
Described balancer 606 is made up of pulley and cuboid framework; Pulley places in the framework.
Described bogie frame 607 is a kind of telescopic oil cylinders that connect big vehicle frame 603 and traversing chassis 605.
The operating principle of trolley 6 is:
According to the span of setting up case beam, post 1 and 3 of horns have three fixedly to be hinged the position; The present invention is furnished with two trolleys 6, every trolley 6 is equipped with two and overlaps independently hoisting mechanism 604, wherein two of dolly cover hoisting mechanisms 604 make left and right sides suspension centre stress equalization by balancer 606, thereby the four-point lifting during with hoisting operation converts three suspension centres to, make the balanced stand under load of case beam, quiet takeoff and landing; Trolley 6 has three-dimensional motion and fine motion function, and the accurate contraposition of energy guard box beam is installed.Big vehicle frame 603 is formed recessed formula plane frame structure by two girders and two butt beams, has reduced the complete machine height; The two ends of two end carriages link to each other with running truck 601 with articulated form, and 4 running trucks 601 support big vehicle frame 603.Running mechanism 602 drives trolleys 6 vertical shifts, and it is traversing that Traverse Displacement Unit 607 drives traversing chassis 605, hoisting mechanism 604 lifting beam sheets.
5, horn 3
As Fig. 9, horn 3 is the rectangular frames that connected into by two girders 302, first crossbeam 301, second crossbeam 303.
Described first crossbeam 301 is a kind of rectangle case beams.
Described girder 302 is a kind of box girder with variable cross section structures, and it is provided with walking rails 3021, and its inboard is provided with guide rail 3022, is provided with ear beam (semi girder) 3023 below it.
Described second crossbeam 303 is a kind of rectangle truss.
The operating principle of horn 3 is:
6, post hydraulic system 2, No. two post hydraulic systems 5, No. three post hydraulic systems 9, trolley hydraulic system 7 equal selection standard outsourcing pieces are power sources of complete machine, promptly are respectively the power source of post 1, No. two posts 4, No. three posts 8, trolley 6.
Claims (8)
1, a kind of walking type box beam bridge formation machine comprises a post hydraulic system (2), No. two post hydraulic systems (5), No. three post hydraulic systems (9), trolley hydraulic system (7);
It is characterized in that: front end, middle part, the afterbody below horn (3) is respectively arranged with a post (1), No. two posts (4), No. three posts (8) that support horn (3); A post (1), No. two posts (4) and No. three posts (8) are connected with a post hydraulic system (2), No. two post hydraulic systems (5) and No. three post hydraulic systems (9) respectively; Be provided with trolley (6) in the top of supporting horn (3), trolley (6) is connected with trolley hydraulic system (7);
No. two posts (4), No. three posts (8) are fixedlyed connected with horn (3), and a post (1) and horn (3) are for fixedly to be hinged.
2, by the described a kind of walking type box beam bridge formation machine of claim 1, it is characterized in that:
A post (1) is made up of the suspension traveling wheels (101) that are arranged in order from top to bottom and are connected, basic post (102), fold mechanism (103), folding post (104) and telescopic mast (105).
3, by the described a kind of walking type box beam bridge formation machine of claim 1, it is characterized in that:
No. two posts (4) are made up of door frame (401), door frame lower transverse beam (402), traveling wheels (403), hydraulic lifting supporting leg (404); Door frame (401) and door frame lower transverse beam (402) are formed " O " shape portal-framed structure; Be provided with traveling wheels (403) and hydraulic lifting supporting leg (404) below the door frame lower transverse beam (402).
4, by the described a kind of walking type box beam bridge formation machine of claim 1, it is characterized in that:
No. three posts (8) are made up of lifting column (801), fold mechanism (802), running mechanism (803), hydraulic suspension balancer (804) and steering mechanism (805); From top to bottom, lifting column (801), fold mechanism (802), running mechanism (803) are arranged in order and are connected; In running mechanism (803), be provided with hydraulic suspension balancer (804) and steering mechanism (805).
5, by described a kind of No. three posts of claim 4 (8), it is characterized in that:
The triangle balancer that hydraulic suspension balancer (804) is made up of telescopic arm (8041), support arm (8042) and connecting rod (8043).
6, by the described a kind of walking type box beam bridge formation machine of claim 1, it is characterized in that:
Trolley (6) is made up of running truck (601), running mechanism (602), big vehicle frame (603), hoisting mechanism (604), traversing chassis (605), balancer (606), Traverse Displacement Unit (607);
Its position and annexation are:
Four jiaos of big vehicle frame (603) are supported by four running trucks (601), and each fixes a running mechanism (602) big vehicle frame (603) the right and left; Be placed with traversing chassis (605) on the big vehicle frame (603), and connect by Traverse Displacement Unit (607); Hoisting mechanism (604), balancer (606) are fixed on the traversing chassis (605).
7, by the described a kind of walking type box beam bridge formation machine of claim 1, it is characterized in that:
Horn (3) is the rectangular frame that is connected into by two girders (302), first crossbeam (301), second crossbeam (303).
8, by the described a kind of horn of claim 7 (3), it is characterized in that:
Girder (302) is a kind of box girder with variable cross section structure, and it is provided with walking rails (3021), and its inboard is provided with guide rail (3022), is provided with ear beam (3023) below it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510019421XA CN100395411C (en) | 2005-09-09 | 2005-09-09 | Walking type box beam bridge formation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510019421XA CN100395411C (en) | 2005-09-09 | 2005-09-09 | Walking type box beam bridge formation machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1737267A true CN1737267A (en) | 2006-02-22 |
| CN100395411C CN100395411C (en) | 2008-06-18 |
Family
ID=36080190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510019421XA Expired - Fee Related CN100395411C (en) | 2005-09-09 | 2005-09-09 | Walking type box beam bridge formation machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100395411C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425120A (en) * | 2011-08-29 | 2012-04-25 | 中铁科工集团有限公司 | Split guide beam type tunnel-passing bridge girder erecting machine |
| CN102433842A (en) * | 2011-12-29 | 2012-05-02 | 上海市机械施工有限公司 | Construction method for erecting thin-wall U-shaped girder of rail transit |
| CN104499433A (en) * | 2014-11-04 | 2015-04-08 | 中铁二十四局集团有限公司 | Method for intersection angle high-speed railway underpassing low-clearance girder erection |
| CN106087763A (en) * | 2016-08-10 | 2016-11-09 | 中铁工程机械研究设计院有限公司 | One crosses the double girder rubber-tyred railway T-girder bridge girder erection of tunnel type and bridging method |
| CN106968179A (en) * | 2017-04-17 | 2017-07-21 | 中铁七局集团第三工程有限公司 | A kind of overall falsework method of use self-propelled carries out the constructing device of Cast-in-situ Beam |
| CN109112974A (en) * | 2018-10-24 | 2019-01-01 | 中铁工程机械研究设计院有限公司 | Bridge Erector and its process of setting a roof beam in place |
| CN112681143A (en) * | 2020-12-18 | 2021-04-20 | 中国二十冶集团有限公司 | Construction method for temporarily fixing T-shaped beam of bridge deck |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234459Y (en) * | 1995-10-16 | 1996-09-04 | 铁道部第一工程局第三工程处 | Single-arm three-upright step bridging machine |
| CN1247918A (en) * | 1999-09-06 | 2000-03-22 | 陈国华 | Omnibearing hydraulic stepping bridge span erecting machine |
| JP3671777B2 (en) * | 1999-11-02 | 2005-07-13 | 鹿島建設株式会社 | Bridge construction method |
| CN2585888Y (en) * | 2001-06-07 | 2003-11-12 | 中铁三局集团邯郸工程机械制造有限公司 | Walking and telescopic single nose girder bridging machinery |
| JP2005240353A (en) * | 2004-02-25 | 2005-09-08 | Ohbayashi Corp | Erection method of bridge |
| CN2871633Y (en) * | 2005-09-09 | 2007-02-21 | 中铁工程机械研究设计院 | Walk cased beamed bridge erecting apparatus |
-
2005
- 2005-09-09 CN CNB200510019421XA patent/CN100395411C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425120A (en) * | 2011-08-29 | 2012-04-25 | 中铁科工集团有限公司 | Split guide beam type tunnel-passing bridge girder erecting machine |
| CN102425120B (en) * | 2011-08-29 | 2013-12-18 | 中铁科工集团有限公司 | Split guide beam type tunnel-passing bridge girder erecting machine |
| CN102433842A (en) * | 2011-12-29 | 2012-05-02 | 上海市机械施工有限公司 | Construction method for erecting thin-wall U-shaped girder of rail transit |
| CN104499433A (en) * | 2014-11-04 | 2015-04-08 | 中铁二十四局集团有限公司 | Method for intersection angle high-speed railway underpassing low-clearance girder erection |
| CN104499433B (en) * | 2014-11-04 | 2016-03-30 | 中铁二十四局集团有限公司 | One wears high ferro low clearance erecting beam construction method under acutangulating intersection |
| CN106087763A (en) * | 2016-08-10 | 2016-11-09 | 中铁工程机械研究设计院有限公司 | One crosses the double girder rubber-tyred railway T-girder bridge girder erection of tunnel type and bridging method |
| CN106968179A (en) * | 2017-04-17 | 2017-07-21 | 中铁七局集团第三工程有限公司 | A kind of overall falsework method of use self-propelled carries out the constructing device of Cast-in-situ Beam |
| CN106968179B (en) * | 2017-04-17 | 2018-07-10 | 中铁七局集团第三工程有限公司 | A kind of constructing device that Cast-in-situ Beam is carried out using self-propelled entirety falsework method |
| CN109112974A (en) * | 2018-10-24 | 2019-01-01 | 中铁工程机械研究设计院有限公司 | Bridge Erector and its process of setting a roof beam in place |
| CN112681143A (en) * | 2020-12-18 | 2021-04-20 | 中国二十冶集团有限公司 | Construction method for temporarily fixing T-shaped beam of bridge deck |
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|---|---|
| CN100395411C (en) | 2008-06-18 |
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