What is a liner plate?

What is a liner plate?

Liner plates, which were developed as a tunnel lining material, are corrugated thin steel sheet with flanges attached on four sides. Because of their outstanding features, our liner plates are used widely in shafts (for deep foundation and jacking methods), catchment wells and other applications.

What is liner plate in construction?

A liner plate is a part of a modern support system in underground construction. Liner plate sections are placed in tunnels and bolted together into a solid sheet that eventually forms a complete tube. The technique is useful in trenchless construction, particularly in the initial stages of tunnel construction.

What is tunnel lining explain in detail?

i. The timber, brick, concrete, or steel supports erected in a tunnel to maintain dimensions and safe working conditions.

What is Forepoling in tunneling?

Forepoling is a method of supporting a weak roof of a mine or a tunnel, used traditionally in soft, loose, or caving ground. To make use of this method, poles, timber, steel tube, or slabs are driven into the ground before or during excavation.

What is full face method in tunneling?

The full face method is normally selected for small tunnels whose dimensions do not exceed 3 m. In this method, the full face or the entire facade of the tunnel is tackled at the same time. (a) Since an entire section of the tunnel is tackled at one time, the method is completed expeditiously.

What is Needle beam method?

The needle beam consists of a stout timber beam or a composite flinched beam and form the main temporary support during the excavation. This method is suitable for soils where roof can withstand for a few minutes. Sequence of operations: A drift(monkey drift) of about 1 metre is driven on the working face.

What is the purpose of lining of tunneling?

Tunnels in loose rock and soft soils are liable to disintegrate and, therefore, a lining is provided to strengthen their sides and roofs so as to prevent them from collapsing.

What is the purpose of tunnel?

Tunnels are underground passages used for transportation. They could be used for carrying freights and passengers, water, sewage, etc Tunnels are more economical than open cuts beyond certain depths. Tunnels avoid disturbing or interfering with surface life and traffic during construction.

What is soft ground tunneling?

A tunnel built in soft ground—such as clay, silt, sand, gravel or mud—requires specialized techniques compared to hard rock, to compensate for the shifting nature of the soil. The tunnel has a diameter of 17.5 m and is the second-largest tunnel of its kind in the world.

What is rock tunneling?

Rock tunneling is a specialty that is incorporated across all of our market sectors, including transportation, roads and highways, rail and transit systems, water and wastewater conveyance, power and energy, and underground storage facilities, including petroleum and nuclear waste repositories.

Which method is adopted in rock tunneling?

Explanation: Blasting is the conventional method which is adopted in case of rock tunneling.

What is drift method of tunneling?

Drift Method: In this method after driving the drift, the drill holes are drilled all round the drift in the entire cross section of the tunnel, filled with explosives and ignited. The rock shatters, the muck removed and the tunnel expanded to the full cross section.