Building Tunnel formwork

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Building Tunnel Formwork：

A compositional steel formwork system mainly used in the building which has regular structure

without beams, the excellent formwork system can make the integral pouring for the wall & slab

easily achieved.

Characteristics:

◆ High stiffness, make perfect shape for concrete.

◆ Easy operation, save labor and force.

◆ Fast forming, repeatedly turnover.

Building Tunnel formwork

Q: Ask, general highway tunnel measurement with the total station to measure which aspects? The more detailed the better: The first instrument identification, according to the drawings issued by the tunnel portal design to determine, determine the portal after the slope portal to lofting, tunnel excavation and excavation contour checking (i.e. overexcavation measurement)

Q: The periphery of the tunnel outline has been sealed with steel seal, and can be used as the external formwork when the concrete is poured. The 3 parts of the tunnel are divided into floor, side wall and roof. When pouring, the concrete can only be pumped in the tunnel, the outside of the tunnel is the Pearl River, and the construction can not be carried out outside the tunnel. The roof pouring, only from the bottom to the pump. Question: 1, the roof concrete pouring, how to discharge the air? How to tamper? 2, the tunnel width of 23 meters, you need to do the construction of the seam or after pouring it? Time is pressing, please reply as soon as possible. Good addition score. Thank you。 If you can't see the picture, click this link:: Concrete construction technology of tunnel roof:Due to the main roof, the floor of a large amount of concrete pouring, consider the construction period and other factors, the site is equipped with 2 sets of automotive pump or HBT60 pump and 300m Phi pipe and a variety of accessories.

Q: What is the vault vault seal and dead seal please give a detailed drawing of the drawing bar do not know how to do?: The arch support is an adjustable template or a small template

Q: How to put the positioning point is based on what is mainly based on my novice, do not: The trolley positioning, the first to the two lining trolley running mileage, and positioning, positioning process will have been completed two off the top two tight lining lining, free end positioning first center point positioning control of elevation and with a plumb line (top surface elevation is equal to the length of the plumb line + if the mileage of two the center point of elevation can be lining),

Q: The arch and the arch of the tunnel: This part of the tunnel lining is generally the first pouring, pouring formwork trolley can be placed on the inverted arch concrete and support, to the construction of the tunnel arch wall concrete.

Q: What is the simple calculation method of the tunnel excavation unit price: Comprehensive unit price methodAs the calculation method of this method and the project of comprehensive unit price, is calculated according to the real need of engineering cost measures the amount of consumption and real price, applicable to the calculation of the amount of engineering projects, mainly refers to the number of entities are closely linked and engineering projects, such as concrete formwork, scaffolding, vertical transportation etc.. Different from the sub project, it is not required that the comprehensive unit price of each measure must include the labor cost, material cost, mechanical cost, management fee and profit.

Q: What are the steps? If you build a template, how to fill in the concrete. The tunnel is to dig all the generalist pouring, or digging into the side. Simply say. Better picture. In addition, we have seen a video, the shield machine to dig up the tunnel after the installation of a number of prefabricated panels, but these prefabricated plate is curved. Do not have to fill in a semicircle tunnel?: Pouring should be set up before the template, the concrete template will be about 50mm*50mm of the pouring bin.After the excavation of the shield, the top arch and the top arch of the casting template are separated, so you can see the situation similar to the arc.

Q: A detailed method is introduced: 1 overall construction planUsing the new Austrian tunneling method, the construction principle is "less disturbance, early spray anchor, ground measurement, tight closure". The rock excavation method of construction; rock class micro bench excavation, pre splitting blasting; IV surrounding rock by construction method (Section IV surrounding rock under the partial, the construction step method), smooth blasting technique; fault fracture zone by middle wall construction method.The ballast is unloaded by the side unloading loader.Two lining the rail trolley, concrete mixing truck to transport concrete, pumping concrete, lining after decoration engineering construction.It is necessary to strengthen the geological prediction in the fault fracture zone and water rich zone, and provide the basis for the construction.

Q: Tunnel two lining car moving outside the template after the demolition of how the car is similar to the nature of the sliding movement and concrete off: In addition there is a template on the trolley Jack and hydraulic cylinder electric control, can be extended to shrink, when the formwork is to open the template of the trolley, when the contraction of template removal

Q: 12 meters of the tunnel car, under normal circumstances, one of the two months to be able to cast a few models?: If the reinforcement in advance or tied to the design of no reinforcement, the normal situation down the car, plus the plug plate, pouring concrete

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