0
Definition from China ZZHZ company
Movable support system is a kind of construction machinery to install bridge girders by way of cast-in-place with its own formwork, supported by box girder.
Bridge girder launcher realizes bridge construction if the girder carrier transports the prefabricated concrete girder to the rear part of the launcher.
Difference between movable support system and bridge girder launcher
1. Without prefabricating concrete girder in the precast girder yard, the movable support system adopts cast-in-place and field maintenance. Averagely it finishes one piece of girder every 12 days. While for the bridge girder launcher, it needs to prefabricate concrete girder, then transport them to be installed on the bridge floor
2. The movable support system has a longer cycle to finish the project but with low investment and high benefit; the bridge girder launcher with a short completion time but high investment
3. With low investment and short preparation time, the movable support system can be fast put into use. While the bridge girder launcher needs a long time to prepare for other equipments such as girder carrier and gantry crane.
4. With less land occupation, the material cost of the movable support system is relatively low.
5. The movable support system is widely used in the mountain area that can not build large-sized precast girder yard, while the bridge girder launcher is popular in large-sized precast girder yard
To sum up, it depends on the practical situation. But generally, the movable support system is more economical and more suitable for constrictive economy environment at present and in the future.
What else can I help you with?
How does the Bridge Girder Launcher Construct Bridge?
With the development of our national economy, the construction of high speed railway reaches unprecedented upsurge. For 10 years, ZZHZ has been involved in manufacturing construction machinery and hoisting machinery. Therein, bridge girder launcher and gantry crane are widely used in high speed railway construction, being awarded the national patent. Featuring reasonable design, convenient installation and dismounting, especially high safety, they are highly praised by our customers and make great contribution to safe construction of high speed railway. Construction project of Beijing-Shanghai high speed railway will be one of the biggest projects. According to design construction specification of Beijing-Shanghai railway and hoisting machinery design specification, ZZHZ designed HZQ series bridge girder launcher for China high speed railway, combined advantages of bridge girder launchers of home and abroad. Made up of main girder, front launching nose, O type support legs, front support legs, bottom launching nose, auxiliary overhead crane, auxiliary support leg of main girder, lifting trolley, winch and lifting system, the bridge girder launcher can install 900t precast girder with span from 24m to 32m. Steps to construct bridge: (1). After finishing installation on the abutment, the bridge girder launcher will move longitudinally from one pier to next pier 1. Two lifting trolleys move to the end part of the main girder, then lift auxiliary support legs of main girder, the bridge girder launcher begins to move forward. 2. After front support legs moves to certain position, lift its cylinder and fix the leg 3. Front lifting trolley lifts the end of the bottom launching nose to move forwards about half distance of main girder, auxiliary overhead crane under the front launching nose lifts the bottom launching nose to the front abutment, the longitudinal movement is finished. (2). Transport girders and Feed girders 1. Two gantry cranes lift one precast girder at the same time 2. The transporter carrys the girder to the end of the bride girder launcher, then take back its cylinder. Trolley to move girders on the transporter carrys the precast girder to somewhere below the front lifting trolley of the bridge girder launcher 3. The front lifting trolley lifts the precast girder to move forwards until the rear lifting trolley can lift the rear part of the precast girder, then they move forwards together 4. Put the girder down into designated location (3). When the bridge girder launcher installs the last girder, 1. Fold up the bottom part of the front leg, then longitudinally move forwards, 2. Support the support leg, then disassemble the rear support leg of the bottom launching nose and remove the launching nose, put down the last girder to finish constructing the whole bridge.
What is the bottom support of a bridge called?
Sub Structure
How do cables help to support a suspension bridge?
They help keep the suspension bridge up by giving it balance.
Why was the suspension bridge invented?
To allow large gaps to be bridged without needing support pillars to hold the bridge up.
What is another way to say bridge support?
A tower or a pier block.
What is the feature of fixed movable bridge?
You can't have a "fixed" "movable" bridge, the two terms are contradictory.
Where is the movable bridge most commonly used?
hghg
What is economical span of a bridge?
its the span of a bridge for which the cost of building both substructure and superstructure is same....
What is the movable bridge of Kolkata?
At Khidirpur near Kolkata Dock. This bridge can be folded and opened to allow passage of ships
What is a large vehicle called?
A tank An erector launcher A recovery vehicle A mobile bridge
Which type of bridge should you build that will hold the most weight?
I want to build a truss bridge because truss bridge is most economical and his dead load is too low.
What is Cable-stayed bridge function?
The cable-stayed bridge is a type of bridge that is optimal for spans longer than is practical for cantilever bridges, and shorter than is economical for suspension bridges.
How does the Bridge Girder Launcher Construct Bridge?
With the development of our national economy, the construction of high speed railway reaches unprecedented upsurge. For 10 years, ZZHZ has been involved in manufacturing construction machinery and hoisting machinery. Therein, bridge girder launcher and gantry crane are widely used in high speed railway construction, being awarded the national patent. Featuring reasonable design, convenient installation and dismounting, especially high safety, they are highly praised by our customers and make great contribution to safe construction of high speed railway. Construction project of Beijing-Shanghai high speed railway will be one of the biggest projects. According to design construction specification of Beijing-Shanghai railway and hoisting machinery design specification, ZZHZ designed HZQ series bridge girder launcher for China high speed railway, combined advantages of bridge girder launchers of home and abroad. Made up of main girder, front launching nose, O type support legs, front support legs, bottom launching nose, auxiliary overhead crane, auxiliary support leg of main girder, lifting trolley, winch and lifting system, the bridge girder launcher can install 900t precast girder with span from 24m to 32m. Steps to construct bridge: (1). After finishing installation on the abutment, the bridge girder launcher will move longitudinally from one pier to next pier 1. Two lifting trolleys move to the end part of the main girder, then lift auxiliary support legs of main girder, the bridge girder launcher begins to move forward. 2. After front support legs moves to certain position, lift its cylinder and fix the leg 3. Front lifting trolley lifts the end of the bottom launching nose to move forwards about half distance of main girder, auxiliary overhead crane under the front launching nose lifts the bottom launching nose to the front abutment, the longitudinal movement is finished. (2). Transport girders and Feed girders 1. Two gantry cranes lift one precast girder at the same time 2. The transporter carrys the girder to the end of the bride girder launcher, then take back its cylinder. Trolley to move girders on the transporter carrys the precast girder to somewhere below the front lifting trolley of the bridge girder launcher 3. The front lifting trolley lifts the precast girder to move forwards until the rear lifting trolley can lift the rear part of the precast girder, then they move forwards together 4. Put the girder down into designated location (3). When the bridge girder launcher installs the last girder, 1. Fold up the bottom part of the front leg, then longitudinally move forwards, 2. Support the support leg, then disassemble the rear support leg of the bottom launching nose and remove the launching nose, put down the last girder to finish constructing the whole bridge.
What is a bridge support called?
A support pole
What does cause a bridge girder launcher accident?
As a professional manufacturer and seller of bridge girder launcher in China, ZZHZ has witnessed many tragedies: devastating accidents caused by the derail and overturn of the bridge girder launcher. Once it happens, the repair will not only cost a long time and a lot of money, but seriously affect the progress of bridge construction and rail construction. With a rapid development of high speed railway, bridge girder launcher will be used more frequently, if there happens an accident, there will have bigger losses and casualties. 1. Artificial factor Each accident is caused by some artificial factors. Actually, if the construction company builds the roadbed and constructs the bridge with high quality by strictly following related regulations, the accident will not happen. Sometimes in order to drive time limit, related construction company neglects safety measures and work standards, leaving hidden trouble to an accident 2. Roadbed and line factors The main reason to cause an overturn accident of bridge girder launcher is roadbed and railway line with bad quality. In the new line and on existing line, there are some hidden troubles more or less such as grave, arc stone pit, local backfilling, ponding immersing, undercurrents transfusion and so on. Especially the filled soil between bridge abutment and bridge head is not solid, which can cause an accident easily. Railway line with bad quality and with unsmooth slope will lead to overturn and skid of the bridge girder launcher 3. Factors from bridge girder launcher Cantilever type bridge girder launcher need to pass through roadbed of bridge head, lifting precast girder. With a high centre of gravity and large axle load as moving forward, the overturn can happen easily. At present, we mainly adopt single girder (or double girder) type bridge girder launcher. Even though they are more advanced, they still have unreasonable structures such as long body, large self weight, large axle load, higher centre of gravity and no protection device, once the accident happens, we can not find an effective solution. 4. Bad maintenance of equipment Bridge girder launcher is of large-sized and complicated equipment with many operation procedures. Some key position breaks down or some critical process is operated incorrectly, which can cause overturn accident. For example: because of a bad maintenance of a bridge girder launcher,No.2 brake breaks down at work which leads to a crash between No.2 transporter and main engine, then the main engine derails immediately, cause a big trouble. The accident of bridge girder launcher threaten people's lives and property safety, so ZZHZ will learn the lesson, follow the standard instruction to decline the accident rate to the smallest.
What kind of bridge uses cable for support?
a suspension bridge
What is the definition of suspension bridge?
A bridge with overhead cables to support it.
