Shield machine: subway tunnel structure and construction method

Shield machine is a common construction equipment in subway engineering. There are many kinds of shield machines, which can be divided into closed type and open type according to whether the excavation face is closed or not. This paper will deeply discuss the types, characteristics and construction control methods of shield machine in subway engineering.

Closed shield machine

The closed shield machine can be divided into two types: earth pressure type and muddy water type, which are different according to the principle of balance between earth pressure and water pressure on the excavation face. These two kinds of equipment are widely used in subway engineering.

Construction control method

The construction control methods of earth pressure shield machine mainly include cutter head speed, propulsion speed, earth pressure, mud-water balance and so on. The construction control methods of slurry shield machine mainly include grouting pressure, grouting quantity and slurry balance.

♂? Safety of construction personnel

In the process of shield machine construction, the safety of construction personnel is very important. Construction personnel need to strictly abide by the safety operation procedures to ensure their own safety and equipment safety.

Understand the types and characteristics of shield machine.

Understanding the types and characteristics of shield machines is helpful for us to better carry out subway construction. When selecting a shield machine, it is necessary to select the appropriate equipment according to the specific engineering conditions and requirements.