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:

The floor concrete is made by the method of subsection pouring, the length of each section is about 16 ~ 24m, and the construction joint is kept between each construction section. After pouring concrete floor, due to the need for roughly 7 days to meet the design requirements of concrete strength, to remove the floor above the first steel purlin and support. During this period of time can be the first construction of steel bars and formwork works, and then the construction of the outer wall of the leveling layer and the wall of the waterproof layer.

Q:When the tunnel fight, there is no provision to fight how many meters left, only by one of the construction

Fixed strip: the use of additional reinforcement fixation; special fixture fixed; the wire and the fixed template (Figure 2).

Q:There are no recycling tunnel templates

If you want another company for the recovery of tunnel two lining trolley, the specific type of price and the address of the template of the trolley that would be able to better the template of the trolley recovery, to play its due value template trolley.

Q:Tunnel construction procedure A cycle of steps

Tunnel construction process, the first branch is a temporary payment, two lining is a permanent support.1, the hole before the edge, the construction of the slope (including drainage, electricity, etc.);2, the construction of large pipe shed3, measurement positioning line;4, drilling, blasting;5, slag, playing anchor, steel, injection (including the initial spray and spray)6, ahead of the anchor (after the pipe section)7, measuring the line;

Q:Design of lining concrete is C30, what should be used in the construction of concrete arch cushion concrete?

Now the actual project is basically C15, if the economy is less than C15.

Q:Where is the B-B section of the tunnel invert reinforcement

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:Would you please tell me the difference between the concrete and shotcrete in the tunnel?

These two kinds of concrete construction method is actually the difference.Formwork concrete: after the formwork is good, the concrete is the concrete, such as the tunnel lining, the bridge pier and so on.

Q:For example, lining, invert, bias and so on words,, to answer the full thank you

Inverted arch: the general shape of the tunnel are horseshoe. Then the bow that you look up at is called an arch or vault

Q:What is the concrete construction of the tunnel invert

As the name implies, concrete is the concrete that needs to be supportedv

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