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:

◆ No assembling, easy operation with formed formwork.

◆ High stiffness, make perfect shape for concrete.

◆ Repeatedly turnover is available.

◆ Widely applied range, such as building, bridge, tunnel, etc.

Building Tunnel Formwork and scaffolding system

Q: How the tunnel template is calculated: According to the experience and the reuse rate of the template, the thickness of the single lane tunnel template is 10mm, the thickness of the single three lane template is 12mm, and the thickness of the one-way tunnel is 15mm. Consider the length of the template and the construction of the impact of general 10m, not more than 12 meters.

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

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: How to design the general layout of the tunnel construction organization design: A very simple plane diagram, indicating the location of the tunnel, into the construction of the sidewalk and the construction of sidewalks, mixing stations and storage yard, air compressor unit location

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

Q: Demolition of tunnel bearing formwork for several days: The removal time of concrete wall and beam column pouring template is determined according to the strength of concrete, different situations: different removal time of concrete strength of the bottom die and the bracket removal should meet the following requirements:

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).

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