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What are the driving jobs in the tunnel
- Outside control traverse 2) elevation control survey 3) in construction traverses
On the measurement of total station
- 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)s
The small side wall of the small side wall and inverted arch in the high speed tunnel
- The pouring of inverted arch and the pouring of the short side wall, do not step in place, install the side die on the inverts
How to arch the arch concrete pouring
- Two concrete tunnel lining, template is used according to the size and shape of the tunnel design custom-made, I-beam welded frame, welded steel plate, known as the "two trolley liner" (hydraulic jack lifting and installation of steel wheel moving on the rail), is generally the length of 9~12m, concrete pouring pump concrete.s
What is the vault vault seal and seal
- Directly in the template hole, make a steel plate bolts
How to remove the template of the two lining trolley moving outside the tunnel
- The template is removed, the car generally has a fixed track, easy to move. What do not understand, you can secretly I hope to help you!s
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.s
How to fill in the tunnel template
- Plane position and elevation meet the design requirementss
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