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The bridge template that the highway needs, probably with what kind of thickness can satisfy
- According to the actual situation of your projects
When the two lining of the tunnel is used as the lining concrete of the two, how to lay out the trolley
- 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 vehicles
What is the simple calculation method of the tunnel excavation unit price
- Comprehensive unit price = labor cost + material equipment fee + mechanical + management fee + profits
Tunnel lighting design steps, 2 teachers said to design a template
- The pupil is 5 times as fast as the increases, which makes the dark adaptation time to defend much longer. Cone cells can produce or reduce pigment in 10 ~ 12min, and the rod cells are almost 60min need to produce all of the pigment, which makes it very difficult for people to adapt to a very dark environment. How long does it take, depending on the extent of illumination.s
What is the vault vault seal and seal
- The hole in the template above people standing on the head of I welded pipe, connected with concrete pump.s
What is the role of the grid steel frame and steel mesh in the power tunnel
- Advanced small pipe grouting small catheter with a diameter of 32-50mm steel pipe, the pipe tip and tube holes for special processing. The first row with drill drilling pipe. Row spacing is 30cm, fan shape, elevation of 5 degrees to about 8 degrees. The length is 2.25m, a single fluid grouting (cement) or double grout (cement water glass slurry). Adjust the grouting pressure according to the soil.s
Concrete construction technology of tunnel roof?
- 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.s
How many meters can be poured in the first floor of the 2 level of the surrounding rock of the railway tunnel?
- And these kinds of excavation methods need to determine the number of excavated meters according to the grade of surrounding rock. Tunnel invert and floor is completed after the initial support (that is, shotcrete, a layer of concrete, in the excavation of rock on some hard rock without vertical spray arch thin, weak surrounding rock shall be sprayed on the vertical arch thickness in this special project map will show) for pouring 2 reinforced concrete lining when left in general is 6~12 meterss
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