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1. Application range of Upstroke Movable Support System

MZ900s Upstroke MSS Bridge Creating Machine is exclusive equipment for the 32m continuous box girder field casting construction in the railway passenger transportation line project.

2. Main features and advantages of Upstroke Movable Support System

● This machine can realize the moving from one pier to next pier by itself, without other auxiliary facilities on the ground. It owns the characteristics of high mechanical degree, safety and reliability.
● Equip with the ceilings of rain-proof and sunscreen, the machine can operate in any time and any weather to improve the working efficiency and guarantee the construction period.
● While erecting the continuous girder or transferring, we just need to expand the side mould frame and base mould. There is no need to dismantle the whole machine in order to improve the transferring efficiency.
● We stick to the symmetrical design principles for the main girder and mould frame. So if there is the two-way construction condition, we just need to replace the position of the front guide girder, front and rear support leg, auxiliary support legs.
● The machine can accomplish the segmental assembly erection of 32m box girder without making the adjustment on the main girder and support leg mechanism.

3. Main technical parameters of Upstroke Movable Support System

4. The design basis of Upstroke Movable Support System

MZ900s Upstroke Bridge Creating Machine in passenger transportation line project is designed according to the <<Purchase and Sale Agreement>>, the drawing of concrete box-girder, piers and abutment provided by customers and some national design standard in the field of machinery.
● << Crane Design Standar t;> (GB/T3811)
● << Steel Structure Design Standar t;> (GB50017)
● << Code for Design of Highway Bridges and Culverts>> (JTJ021)
● << The General Safety Technical Requirements for Engineering Machinery>> (JB/T6030)
● << Code for Construction and Acceptance of Electrical Appliance Installation Engineering>> (GB50256)
● << The General Technical Conditions for Hydraulic System>> (GB 3766)
● << Code for Construction and Acceptance of Steel Structure>> (GB50205)
● << Mechanical Properties of Fasteners—Bolts, Screws and Studs>> (GB 3098.1)

5. Main design requirements of Upstroke Movable Support System

● The machine can meet the needs of the 32m, 24m full-span box girder erection in the railway passenger double line project.
● While the machine needs to erect the continuous girder or transferring, just to expand the side mould frame and base mould.
● The machine moves with the walking hydraulic jacking system, replacing the support legs with the steel rope traction method.
● The single main girder structure with a rigid and flexible support leg as the supporting.
● The weight-casting capacity: about 900t
● Max. anti force at working: 5805KN
● Applicable curve radius: R＞2000m
● Applicable longitudinal slope/ transverse slope: 2%/2%
● The deflection of main girder: 1/700

6. Main mechanical manufacturing technology of Upstroke Movable Support System

● Firstly the workmanship department evaluates the drawing.
● Draw up the operation instruction then make the judgment.
● According to the drawing, workmanship technology, manufacturing skill and assembly ability to further perfect the dimensions of the machine and meet kinds of requirements. Also do the detection for the mechanical parts.
● Prepare the clamping apparatus according to the drawing.
● Strictly control the quality in the process of production. 5.6，According to kinds of standards, strengthen the management and control in every part and production process.

7. The quality control in Upstroke Movable Support System manufacturing process

Technology file drawing and project are handed to production department which assorts with related department and quality department to process, manufacture, control, check and accept of product.       
The workshops do the following work according to drawing:
● blanking splicing（technology and requirements of blanking splicing）
● assembling welding（welding procedure card, welding technology qualification and welding record）
● mechanical manufacture（mechanical manufacturing card）
● finishing time of manufacture and patrolling card
● Assembly（assembly technology）
● checking descriptive chart（controlling the geometry size and key part）.

8. Tracing data and leaving factory data of Upstroke Movable Support System

● The tracing data of product is made up of contract, review file, drawing , calculation book of design, specification, installation project, raw material quality certificate, product quality inspection record, welding inspection report and purchased certificate.
● leaving factory data is made up specification, installation project, certificate and receiving report etc.

9. The installation method and steps of Upstroke Movable Support System

● Assemble the temporary supporting frame
● Install the front and rear support legs, longitudinal traveling auxiliary support legs
● Assemble the main girder
● Assemble the hydraulic and electrical devices
● Place the whole machine in the proper position
● Install the cantilever beam
● Assemble and hoist the base mould
● Install the side mould frame
● Adjust the base mould plate
● Assemble the side mould plate and poles
● Adjust the side mould plate
● Install wing mould plate
● Assemble the special-shape mould plate and pier top bulk mould
● Carry the pressure and load test

10. Checking methods after installation of Upstroke Movable Support System

Check the dimension, perpendicularity, pre-camber, deflection when the installation is done.
● The overall dimension: 62.5m(L) ×20.6m(W) ×5.6m(H above the bridge)
● The upper deflection of main girder: AF=(0.9/1000-1.4/1000)S
● Adjust the pre-camber to approach the standard of the instructions
● The main girder side curvature: AFP≤S/1200
● Assemble and connect the high-strength bolt according to the standard

11. Operating requirements and attention of Upstroke Movable Support System

The operators must read the instructions carefully, and stick with the regulations to operate the machine. The specific requirements are as following:
● Fasten the machine bottom with pier top and beam surface embedded parts while the support legs are working. The professional personnel must check it carefully before the next procedure.
● After finishing the poles’ installation, the professional personnel must check it carefully before casting the beam.
● No operations in the bad weather such as: strong wind, rain, heavy fog and icy snow.
● No operation and working if the wind force has exceeded grade 7. Take some protection measures to guarantee the machine’s stability when the wind force exceeds grade 11.
● Equip the lighting device when the machine operates at night in the working area and passageway to guarantee the construction safety.
● Make sure that the traveling rail is smooth without the obstacles. g, The operators must accept the professional training and achieve the operations certificates of special equipment.

12. The maintenance time and item of Upstroke Movable Support System

● After construction are finished everyday, the workers must check the following content: if the level of main longitudinal girder meets the requirements or not; the connection of bolts and pins are firm or not; the electrical wires are broken and extruded; hydraulic system is regular or not; the track joints are plain and smooth or not;  the connection of position limiter of crane and trolley are firm or not; the rail clamping device is in the working position or not; bed timber is plain and stable and the size of gauge is right or not etc.     
● The welding lines are checked every month :：upper and down chords of main girder , web plate, vertical welding lines of legs  and the welding lines of connecting frame etc. The operators should stop working when the welding lines are broken or fatigue crack.  When the users find the crack by eyes, but they can’t make sure the dangerous degree, so they should use the welding inspection instrument to test and then adopt reasonable steps to deal with.
● About the painting of structure which should be painted again every two years. The users should clean the primary surface by steel brush and pay attention to the welding lines before the structure are painted.
The lifting mechanism, traveling mechanism of crane and trolley, reducer of motor and steel rope of winch are lubricated and maintained according the rules of specification.  

13. The disassembly and site-transferring steps of Upstroke Movable Support System

The dismantling, transferring scheme is opposite with the installation scheme. The procedures are as following:
● Choose the hoisting equipment according to the part weight
● Disassemble the special shape mould plate and pier top bulk mould
● Dismantle the wing mould plate
● Disassemble the side mould plate and poles
● Dismantle the base mould structure and plate
● Disassemble the cantilever beam
● Dismantle the main girder
● Disassemble the front and rear support legs and auxiliary support legs
● Loading and transferring

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