Introduction and use of tunnel lining trolley

Tunnel lining trolley is a professional equipment that must be used in the secondary lining of the whole process of tunnel construction, which is used for the construction of the concrete secondary lining of the tunnel cavity. Concrete lining trolley is an essential non-standard product for secondary lining in the whole process of tunnel construction. The key is simple lining trolley, full-hydraulic drilling rig fully automatic walking lining trolley and net platform lining trolley. The lining trolley of full hydraulic drilling rig can be divided into side arch type, full round needle beam type, bottom mold needle beam type, full round shuttle type, etc. In the construction of hydraulic tunnels and bridges, it is also widely used to improve the slipform, lifting slipform and casting.

Waterproof board trolley

Tunnel lining trolley is a professional equipment that must be used in the secondary lining of the whole process of tunnel construction, which is used for the construction of the concrete secondary lining of the tunnel cavity. Concrete lining trolley is an essential non-standard product for secondary lining in the whole process of tunnel construction. The key is simple lining trolley, full-hydraulic drilling rig fully automatic walking lining trolley and net platform lining trolley. The lining trolley of full hydraulic drilling rig can be divided into side arch type, full round needle beam type, bottom mold needle beam type, full round shuttle type, etc. In the construction of hydraulic tunnels and bridges, it is also widely used to improve the slipform, lifting slipform and casting.

Preparation of main uses of commodities

Full-round lining trolley is commonly used in hydraulic tunnel construction site, and vertical joints of concrete engineering construction are not allowed in the tunnel, which is generally used when the span of hydraulic tunnel is large.

Application of full-circle shuttle type; side top arch type lining trolley is more widely used, common in road, railway line tunnel and underground cavern concrete secondary lining engineering construction

Product category introduction preparation

The general design scheme of the vehicle is a steel arch platform type, the application of standardized combined steel formwork, no fully automatic walking, the use of external driving force drag, off-stand formwork all for human actual operation, labor efficiency. This kind of lining trolley is generally used for the construction of short tunnel engineering, especially for the construction of tunnel concrete second lining engineering with complicated plan and spatial geometry, frequent process changes and strict processing technology regulations, its advantages are more obvious. For example, the Xiaojinkou double-arch tunnel of Guangzhou (Zhou) Hui (Zhou) Expressway is 200m long and its plan is located at the circular curve transition section with R = 300m. In addition, the tunnel is also located on the plane curve with R = 2500, making the tunnel shape "hyperboloid". The middle wall is also a straight wall design scheme. The entrance and exit 15m are gradually changed from R = 5.5m to R = 7.5m sound horn structure, the tunnel building reinforced concrete second lining adopts a simple arch trolley design scheme, which effectively solves this problem, and the project cost is low. In the application of simple vehicles, most of them are filled with concrete by manpower, and the small Jinkou simple lining trolley is filled with concrete delivery pump truck, so the bending stiffness of the vehicle should be especially improved. Some simple lining trolley also uses the overall building formwork, but the ball screw jack is still used to take off the formwork, and there is no full-automatic movement. Such vehicles are generally filled with concrete delivery pump trucks. The simple lining trolley is widely used in combination steel formwork, which is generally made of sheet metal. The bending rigidity of the building formwork should be considered in the design process, so the spacing of the steel arch frame is not suitable for too large. If the length of the building formwork is 1.5m, the average interval of the steel arch frame shall not exceed 0.75m, and the vertical connection head of the building formwork shall be built between the frames to facilitate the installation of formwork scaffold fasteners and formwork hooks. If the stirring pump is used for perfusion, the perfusion rate is not suitable for too fast, otherwise it will cause deformation of the combined steel formwork, especially when the thickness of the second lining exceeds 500mm, the perfusion rate should be slowed down. Be careful when pouring to the top, pay attention to the concrete pouring condition at any time and anywhere, and avoid forced pouring concrete after filling, otherwise it will cause mold explosion or vehicle deformation and damage.