Q:Highway bridge template needs, probably with the thickness of both the construction requirements can be met, and more cost-effective?

According to the actual situation of your project

Q:What is the simple calculation method of the tunnel excavation unit price

Comprehensive unit price = labor cost + material equipment fee + mechanical + management fee + profit

Q:What is the first project of tunnel constructionNow to do some of the tunnel program, you need to be the first to list out, a total of what? I know that the first branch, two lining, inverted arch, tunnel, pavement these

Summary of construction of the first two tunnel lining

Q:Loess tunnel construction quality control points

3) arch filled with rubble concrete should meet the requirements of the relevant regulations.4) concrete or rubble concrete arch above the back should reach the design strength of concrete arch in the back 70% after construction.

Q:In the tunnel construction, the water stop belt and the water stop strip are respectively used in what place, the construction joint and the subsidence seam many meters set a, above all has any function

If you need to connect in the field, you can use the electric heating plate vulcanization bonding or cold bonding (rubber water stop) or welding (plastic water stop) method, such as user connection is difficult, I can send technical personnel on-site guidance.

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:When the two lining of the tunnel is used as the lining concrete of the two, how to lay the trolley? Please kindly explain steps.

If the template comparison rules, the design center line directly, that is, the center of the car can be, and then measured elevation and the design elevation of the introduction of the real distance from the real point of the vehicle

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

Characteristics of shotcrete:(1) the sprayed concrete has the characteristics of rapid growth, strong bonding force, high density and good impermeability. It can better fill the gap between the rock blocks, increase the integrity of the surrounding rock, prevent the free surface weathering and loosening, and work together with the surrounding rock.(2) the construction of shotcrete will transfer, pouring and tamping a few processes into one, and do not need a template, so the construction of fast, simple.(3) sprayed concrete can play an important role as early as possible.(4) compared with the concrete, the physical and mechanical properties of sprayed concrete are improved.

Q:Tunnel steel arch behind the steel mesh after a layer of fine iron wire mesh what effect is there?

2, ingate construction shaft sealing, to get rid of advanced small pipe grouting reinforced concrete, and supported the upper ingate upper grille steel frame, injection, get rid of the upper concrete lower reinforced concrete, erecting of ingate to spray the concrete lower grille steel frame.

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

You haven't even touched the tunnel. Simply to say that the lining is the use of concrete or reinforced concrete tunnel inside the template pouring. The author is to stabilize the stability of the rock itself, followed by the tunnel in order to facilitate the application of.