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Beam Launcher for Bridge/Highway/Railway Construction

FOB Price:	US$270,000.00-340,000.00 / Set
Min. Order:	1 Set

Min. Order	FOB Price
1 Set	US$270,000.00-340,000.00

Port:	Ningbo, China
Production Capacity:	50 Sets/Year
Payment Terms:	L/C, T/T, D/P, Paypal, Money Gram

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Product Description

Company Info

Basic Info.

Model NO.

Common type

After-sales Service

Within 24 Hours Online

Warranty

1 Year

Certification

CE, ISO9001

Condition

New

Maximum Lifting Weight

100-150t

Main Girder Form

Double Girder

Trademark

ZHONGJIAN

Transport Package

Air Bubble Film/Nude Packing/Carton

Specification

Steel product

Origin

China

Product Description

While superficially similar, Single girder beam launcher should not be confused with movable scaffolding systems, which also are used in segmental bridge construction. Both feature long girders spanning multiple bridge spans which move with the work, but launching gantry machines are used to lift and support precast bridge segments and bridge girders, while movable scaffolding systems are used for cast-in-place construction of bridge segments.
Typically, precast segmental bridges and precast girders are placed using ground-based cranes to lift each segment or girder. However, ground access to the spans may be challenged by the presence of existing infrastructure or bodies of water or the height to which the segments must be raised can exceed the reach of ground-based cranes. A launching gantry can be used to solve these issues.
The most visible feature of a launching gantry are the twin parallel girders which can either be above (upper-beam) or below (lower-beam or underslung) the bridge deck. However, a single beam can also be used, typically in upper-beam configuration. The launching gantry machine usually is sized to the construction project, with the length of the twin main girders approximately 2.3 times the distance between spans. This length enables the launching gantry to span the gap between two adjacent bridge piers while providing allowances for the distance required for launching to the next span and flexibility of movement to accommodate curved paths between piers. In some cases, hinges have been inserted into the gantry girders to allow tighter curves. The launching gantry girders are supported at each pier by braced frames which have a limited range of movement to facilitate placement of bridge segments or bridge girders; the launching gantry does not generally contact the bridge deck.
Two gantry trolleys can run the full length of the launching gantry girders. Each trolley is equipped with two winches: a main winch to suspend the load, and a translation winch to move the trolley along the girders. When bridge segments (or bridge girders) are delivered at the ground level, the launching gantry is used to pick them up and raise them to deck or pier height. If the segments (or girders) are delivered instead at the bridge deck level, the launching gantry moves back to allow the forward trolley to pick up the front end of the next segment (or girder), while the back end of the segment (or girder) is supported by the transportation vehicle; as the forward trolley moves forward, the rear trolley takes over supporting the back end from the vehicle.
Bridge segments (or bridge girders) are set in place by the launching gantry until the span between adjacent piers is completed. For segmental bridges, typically a span-by-span or balanced-cantilever approach is adopted to place segments. To free up the gantry trolley(s), temporary hangers are used to support each segment after it has been placed. In the span-by-span approach, all the segments for a span are placed before bridge tendons are tensioned; in this fashion, work progresses from one pier towards an adjacent pier. In the balanced-cantilever approach, segments are placed simultaneously on each side and work progresses from a central pier towards the two nearest piers instead. In either case, the launching gantry girders and hangers essentially serve as false work prior to tensioning.
Once the bridge span between adjacent piers is completed, the winches on the trolleys are used to lift the gantry girders and "launch" them ahead to the next span. The process of lifting and placing bridge segments (or girders) followed by launching the gantry girders ahead is repeated until the bridge is complete.
Launching gantries are often distinguished by the design of the main girders.

Honeycomb Girder:
The honeycomb girder launching gantry has been proven suitable to a lifting range of 5 to 300t.
The main girder of a honeycomb girder is fabricated from welded plates, forming an isosceles triangle cross-section. Regular hexagonal holes are cut in the inclined web plates to reduce wind resistance. Because the honeycomb girder is formed by relatively long seam welds joining plates, the welds will not lose integrity easily due to small welding defects.
Truss Girder:
The main girder of a truss girder is fabricated from welded steel poles. The welds in a truss girder are point-to-point (joining steel poles to other poles), which requires more stringent welding technology and technique. With small self-weight and large deflection, the truss girder launching gantry is suitable for highway bridge construction projects.
Box Girder:
The main girder of a box girder also is fabricated from welded plates. This type of girder is usually used in high-speed railway bridge construction projects.

------------------------------------------------------------Design and manufacturing features---------------------------------------------------------------

The Beam Launcher has many advantages, such as light weight, high stiffness, low deflection, and high wind-resistance.
Unique steel pin connection, which is not only firm, but also easy to install.
Flexible steel legs, convenient to disassemble and transfer.
The frequency-converter can be installed according to the user's requirements.
Customized Beam Launcher for bridges with span ranging from 20m to 70m.
Beam feeding from rear end of the Beam Launcher on the deck level or from below on ground level or from bridge side.
All Series Beam Launcher are designed to be fit into and deliver by 40 footer open top container.
Beam Launcher comes with centralize control system, multi-speed Crane, Hydraulic powered Support, Mechanical powered Self Advancing system.

Product Parameters

Model		JQG120/30m	JQG160/40m	JQG200/50m	JQG250/55m	JQG320/60m
Capacity (t)		2 x 60	2 x 80	2 x 100	2 x 130	2 x 160
Max. Span (m)		30	40	50	55	65
Lifting Height (m)		7	7.5	9	9	8.5
Lifting Speed (m/min)		0.98~1.17	0.78~1.1	0.8~1.1	0.9~1.1	0.785~0.955
Work Duty		A3	A3	A3	A3	A3
Max. Slope of Longitudinal(%)		± 4	± 4	± 4	± 4	± 4
Transverse Speed of Trolley(m/min)		2.16	2.3	2.3	2.3	1.985
Min. Applicable curve Radius(m)		300	300	300	300	300
Speed of Longitudinal Truss Car(m/min)		3.24	0~4	0~4	0~4	0~5.08
Max. Slant Angle		45º	45º	45º	45º	45º
Longitudinal Speed of Main Girder Travel(m/min)		3.37	0~4	0~4	0~4	0~5.08
Transverse Speed of Whole Crane(m/min)		2.13	2.13	2	2	2.03
Max. Jacking of Hydraulic Front Leg(KN)		2 x 600	2 x 800	2 x 1000	2 x 1200	2 x 1600
Max. Jacking of Hydraulic Middle Leg(KN)		2 x 600	2 x 800	2 x 1000	2 x 1200	2 x 1600
Max. Jacking of Hydraulic Rear Leg(KN)		2 x 400	2 x800	2 x 1000	2 x 1000	2 x 1200
Theoretical Operation Effiency(hour/pieces)		0.5 ~ 1.2	0.5 ~ 1.2	0.5 ~ 1.2	0.5 ~ 1.2	0.5 ~ 1.2
Total Power(Kw)		76.1	84.7	103.3	155.6	208.2
Total Weight(t)		≈117	≈156	≈218	≈345	≈433
Dimension	W	53182	67632	87380	95611	114808
	L	30000	40000	50000	55000	65000
	D	7600	7600	7600	8000	9800
	d	4500	4500	4600	4800	5600
	A	14488	9739	9645	10300	13380
	a	9500	9500	9500	10232	12000
	H	7910	8270	8916	9943	10925

Address: Shaoxing, Zhejiang, China

Business Type: Manufacturer/Factory

Business Range: Manufacturing & Processing Machinery

Management System Certification: ISO 9001

Main Products: Beam Launcher, Gantry Crane, Launching Gantry, Segment Lifter, Girder Launcher, Electric Winch, Form Traveller

Company Introduction: Zhejiang Zhongjian Road and Bridge Equipment Co., Ltd, founded in 1994, is a professional lifting equipment provider. It specializes in the design, manufacture, installation, maintenance and service of large non-standard lifting machinery, which is a member of the National Technical Committee for Standardization of crane, National High-tech Enterprise, the honor winner of first national manufacturer of beam launcher.

The company has nearly 200 employees, including more than 80 senior engineers, engineers, technicians and other professional and technical personnel, which effectively guarantees the independence of product design and high standard quality. There are plasma CNC cutting machine, flame CNC cutting machine, CNC gantry welding machine, welding robot, CNC lathe, milling machine, machining center and other kinds of machining, testing, testing equipment. It owns the boring and assembly equipment for the main beam of the bridge erection machine, the whole through type shot blasting equipment, painting production line, and has perfect ability to produce lifting equipment. Excellent professional talents, advanced production lines and efficient enterprise management have improved the market occupancy and market competitiveness of Zhongjian products.

Our company keep pace with the times, successively develops large bridge lifting equipment for road and bridge construction - beam launcher for road and railway, launching gantry, general gantry crane, electric hoisting gantry crane, segment lifter, form traveller and so on, which makes the enterprise products gradually become systematical and global as well as be widely used in railway, highway, bridge, subway and other construction projects. Our products are sold all over the country, and exported to the Americas, Africa, the Middle East, southeast Asia and other overseas countries and regions, by the height of the customers at home and abroad, recognized as "lifting machinery industry for incurable experts".

Now the company has passed the European Conformity Certification, ISO-9001 Quality Management System Certification, ISO-14001 Environmental Management System Certification, OHSAS-18001 Occupational Health and Safety Management System Certification, and obtained the "A" level Production License of Special Equipment

Including manufacturing, installation and maintenance, Production License of construction safety and the lifting equipment installation engineering professional contracting without grade qualification issued by Department of Housing and urban-rural construction of Zhejiang province. Our company has 12 invention patents, more than 80 utility models, 34 scientific and technological achievements, and more than 10 urban-level science and technology awards.

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