building tunnel formwork and scaffolding system

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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 and scaffolding system

Q:The tunnel lining is wood, how should support?: The excavation of the tunnel face, slag, to the primary support system, first hit the bolt, then use steel or steel made of steel, installation support in tunnel contour, and then sprayed concrete (poor surrounding rock hanging steel mesh, then sprayed fiber concrete).

Q:I would like to know the safety awareness of the tunnel lining formwork trolley Prawns to help answer oh: Two during the 1 excavation of earthwork calculating boundary line is important??? 2 measuring points as far as the standard

Q:What are the reasons for the two lining concrete lining of the tunnel?: (1) the steel frame is put aside, there is no reinforcement pad or pad number is not enough, the position is not correct, resulting in the reinforcement close to the template and exposed.(2) the coarse aggregate size is greater than the reinforcement spacing, or the debris is placed in the steel frame, while the concrete leakage, forming a serious honeycomb and holes and exposing the reinforcement.

Q:Main diseases and prevention of tunnel: Main diseases and prevention of tunnel1 over excavation in tunnel excavationPhenomenon: in tunnel excavation, the upper, lower, left and right contours are exceeded.The reason analysis: the measurement is not allowed, the deviation is big; the hole position deviation is bigger; the hole in the hole drilling process does not have the straight hole to have the slanting hole to exceed the limit; the blasting parameter choice is wrong, the charge quantity is too much or unreasonable.Preventive measures: to ensure the measurement work turnover review system; accurate calculation of blasting parameters, the formal process test before entering the tunnel, timely adjust the parameters change of geological condition; hole position and direction control in drilling process.

Q:How to design the general layout of the tunnel construction organization design: The location and sketch map of explosive storehouse, spoil yard, office location, living area, entertainment area, temporary drainage ditch.

Q:What is the role of the grid steel frame and steel mesh in the power tunnel: Function as follows:1, the construction of the shaft excavation of the power tunnel shaft structure is a permanent structure, the construction of the shaft using shotcrete + net structure steel frame + steel mesh support + waterproof film + cast-in-place reinforced concrete lining method.

Q:What is the width of a ring in a tunnel: Generally used in the tunnel as a two car lining template

Q:How to fill in the tunnel template: The template is firm and smooth, there is no error, such as leakage

Q:I would like to ask the high-speed rail tunnel invert small side wall and arch with the small side of the wall of the hanging formwork of what a good method?: Die casting. Install the inverted L hanger on the side wall.

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)

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