Building Tunnel Formwork 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 System

Q: The tunnel structure of plastic mould: Tunnel construction, due to the wall and floor can be cast at the same time, therefore, the design of the building has the following requirements.(1) the width and height of the room should be relatively constant, and the thickness of the bearing wall should be consistent.(2) there are two longitudinal walls inside the corridor, and the upper and lower layers are thick enough to adjust the depth of the rooms on both sides.(3) the thickness of the floor should be kept constant.(4) the basic unit of the structure must be open on one side, and the large span can be opened on both sides.(5) the arrangement should be avoided in the plane.

Q: Ask, general highway tunnel measurement with the total station to measure which aspects? The more detailed the better: Steel arch support and Lifang line checking, bottom excavation and invert excavation, lining template checking and lofting, invert pavement template checking, reinforced lofting and lining ditch school inspection, line and template checking

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: What are the driving jobs in the tunnel: Outside control traverse 2) elevation control survey 3) in construction traverse

Q: What are the reasons for the two lining concrete lining of the tunnel?: (4) improper concrete mix, segregation, depending on the template part of the lack of slurry or template serious leakage;(5) no watering wood template wet, water bonding or early form removal, Chaimo missing edge off angle, resulting in reinforcement.

Q: What is the width of a ring in a tunnel: Of course, the assembly of the tunnel, such as subway shield tunnel, a ring is the length of the shield segment, there are 1.0m, 1.2m, 1.5m, 2.0m.

Q: Demolition of tunnel bearing formwork for several days: With the temperature, the need for concrete strength of 100% to remove the template

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: 5, the user should be based on the order of the project structure, design drawings to calculate the length of the product, the special-shaped structure should have drawings, as far as possible in the factory will be connected to the whole

Q: 12 meters of the tunnel car, under normal circumstances, one of the two months to be able to cast a few models?: According to the normal situation, three days a lining cycle, a month to play at least 9 plates!

Q: How many meters can be poured in the first floor of the 2 level of the surrounding rock of the railway tunnel?: 6 excavation methods of tunnel1, full section method2 step method3, three steps of the 7 step excavation method4, septal wall method (CD method)5, the intersection of the next door method (CRD method)6, double side drift method

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