Building tunnel formwork

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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

Q:Loess tunnel construction quality control points: 2) the invert, invert the filling layer and dry concrete construction should be concrete accurately, use the template, mechanical tamping compaction. The inverted arch concrete by pumping casting, should use the arch template ensure molding size meets design requirements. The construction of invert arch and filling layer should be completed according to the design of inverted arch concrete construction, the appropriate interval, and then change the proportion of concrete, filling layer of concrete construction;The construction of inverted arch and the cracks and deformation joints should be waterproof treatment according to design requirements, should be in accordance with the relevant provisions of this guide.Invert the overbreak in the allowable range, should be used with the same strength grade of concrete lining casting; overbreak exceeds, should according to the requirements of design and specification of the backfill, shall not use the random hole slag backfill, non intrusive rubble arch section.

Q:What is the role of the tunnel formwork trolley? What is the use of template trolley?: The car is often used in the construction of hydraulic tunnel, the tunnel is not allowed to have concrete construction longitudinal joints, in the hydraulic tunnel span is large

Q:The arch and the arch of the tunnel: Tunnel invert refers to the bottom of the tunnel (anti arch, so called inverted arch)

Q:The tunnel lining is wood, how should support?: Small pipe or large, medium pipe shed is the advanced support for the broken rock area or into, out of the hole, of course, grouting, grouting without losing the significance of the implementation.

Q:What is the concrete construction of the tunnel invert: As the name implies, concrete is the concrete that needs to be supportedv

Q:Main diseases and prevention of tunnel: Insufficient anchor tensionPhenomenon: anchor installation is not strong, pulling force is not enough.The reason analysis: anchor length is not enough; mortar grouting is not full; mortar wrapped anchor thickness is not enough or not at all; holes in the debris is not clean; the depth of the hole with the length of the bolt is not matching.Preventive measures: the hole diameter should be matched with the bolt diameter; strictly according to design deep hole drilling; grouting pressure and wind pressure water rinse perforations; bolt rust, straightening, ensure the bolt and hole center line on the same line of installation; the hole from the bottom of the hole, uniform and continuous. Midway not interrupt; using earlystrong medicine package bolt, the bolt diameter should be treated with perforation diameter matching.

Q:How to design the general layout of the tunnel construction organization design: I need to contact you to provide a template..

Q:What is the role of the grid steel frame and steel mesh in the power tunnel: The production of the grid steel frame component production and installation grid steel frame component is suitable for the production of the steel frame of the initial lining and the support of the digging tunnel. The steel grid with steel and steel by welding is composed of steel frame, steel grille by assembling (bolting, welding) after the formation of the steel arch structure after initial support structure of sprayed concrete, which is applied in soft soil tunnel structure is the most effective measure.

Q:A detailed method is introduced: 1 overall construction planUsing the new Austrian tunneling method, the construction principle is "less disturbance, early spray anchor, ground measurement, tight closure". The rock excavation method of construction; rock class micro bench excavation, pre splitting blasting; IV surrounding rock by construction method (Section IV surrounding rock under the partial, the construction step method), smooth blasting technique; fault fracture zone by middle wall construction method.The ballast is unloaded by the side unloading loader.Two lining the rail trolley, concrete mixing truck to transport concrete, pumping concrete, lining after decoration engineering construction.It is necessary to strengthen the geological prediction in the fault fracture zone and water rich zone, and provide the basis for the construction.

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

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