The Strengths of MIYAJI ENGINEERING GROUP, INC.
Strategic and special equipment holdings for handling any kind of construction
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The most common type of bridge erection construction work is the crane bent erection method. Segmented blocks are received by a bent (a temporary cradle) and successively erected. For locations that are difficult to shut down for long periods of time, such as when erecting bridges over roads or rail lines, special erection methods such as the launching method must be used. This requires a great deal of special erection equipment along with the erection planning capabilities and worksite management capabilities needed to use them. MEG has worked on many difficult special erection construction projects, so it has an extensive track record of developing the special equipment that is necessary. This includes high speed launching equipment for rapidly erecting bridges over railroads and large unit jacks for erecting multiple large blocks at once. When it comes to special erection, we have some of the finest technical capabilities in the industry. Furthermore, expanding large-scale renovation construction work and large-scale construction work, which are highly technically challenging, an extensive pool of special equipment to be on-hand at all times. That's why MEG has four equipment centers in Japan, where it keeps and updates its extensive strategic and special equipment. MEG also has a long track record of using its rich array of strategic equipment to perform emergency recovery work, rapidly restoring social infrastructure damaged by disasters.
That's why MEG has four equipment centers in Japan, where it keeps and updates its extensive strategic and special equipment. MEG also has a long track record of using its rich array of strategic equipment to perform emergency recovery work, rapidly restoring social infrastructure damaged by disasters.
Special building construction methods
(1) Multifunction stage construction method
The multifunction stage construction method involves the assembly of a steel frame on a stage that has functions for supporting heavy objects, allowing vehicle transportation, and enabling relocation of itself. This method that reduces the amount of high-elevation work and makes the construction process safer, is used in the construction of structures such as large-span roof.
(2) Bear-Loc jack lift-up construction method
This construction method uses Bear-Loc jacks, which have a mechanism that unlocks and drives up a piston when hydraulic pressure is applied, to safely lift up loads. Lifted steel frames are mechanically supported, ensuring safety even in the event of an unexpected accident.
(3) Lift-up and travelling construction method
This construction method is used for large interior spaces and heavyweighted structures, such as megatruss. The assembly is performed on the ground, and then a power link system is used to lift and slide the assembled structures, securing them in their designated locations. It is also referred to as the hoisting and travelling construction method, which includes hoisting of large-span structures by using movable girders.
(4) Climbing protective system
The climbing protective system is a combination of falling object protection, which is used in the construction of tall steel towers and the like, and work scaffolding. Instead of assembling and disassembling the protective equipment according to the progress of construction work, the entire system can be raised or lowered to the level of the work location. This system reduces the amount of high elevation work required for the assembling and disassembling of temporary protective equipment. It also ensures the construction work to be performed safely within protected areas.
(5) High chimney dismantling method
The high chimney dismantling method is a construction method used to safely dismantle a chimney shaft supported by a steel tower on the ground.This construction method uses lifting equipment such as Bear-Loc jacks to chip away refractory material from the inner surface of the chimney shaft and to cut and remove the chimney material itself. The lifting equipment is then used to lower the entire chimney shaft, and the process is repeated until the entire chimney is dismantled. Each stage of dismantling is performed from the bottom of the structure, which significantly reduces the amount of high elevation work and enables the dismantling to be performed safely. After the chimney shaft is dismantled, the remaining steel tower is cut and removed from the top to the bottom by using a crane.
Special construction equipment
(1) M-truss (lightweight three-dimensional truss system)
This collapsible, temporary construction material uses a lightweight, three-dimensional truss structure.
(2) M-stage equipment
These stages can be attached to the booms of 50 to 220 t hydraulic cranes via an attachment. We have large work stages (standard size: five units) with built-in automatic control devices and compact stages (compact size: two units) that are half the size of the large stages.
(3) Multifunction climbing crane equipment
These cranes climb along guide rails installed on the sides of towers. They can also be automatically changed to side climbing travelling cranes.