Pipe ramming has recently become one of the most popular installation methods for steel casings and pipes into type 3, 4, and cobble filled soil. The trenchless installation method uses energy from a percussion hammer that is attached on the end of a pipe. Though it is a popularly used technique, there are many frequently asked questions on the subject.
What is Pipe Ramming?
Pipe ramming is a procedure for driving open ended casing or pipes through soils using percussive blows to the end of the pipes. The process of ramming swallows any obstructions there may be such as boulders and cobbles by cracking and busting them in place. This trenchless method is helpful for installing under roads or railways as it causes much less surface settling or heaving compared to other methods.
Is Pipe Ramming the Best Trenchless Solution?
In cobble filled soils, pipe ramming is very effective as it prevents running soils or raveling that can be caused by other trenchless methods. It is also effective with type 3 and type 4 soils when dewatering is impractical. The method is favoured by railways as it limits the potential for damage in unknown or bad conditions of ground. As it swallows any boulders, there are no risks concerning what moved boulders may cause.
What are the Alternatives?
Pipe ramming is often the alternative for other trenchless methods. It is often used as part of a risk mitigation strategy and replaces alternatives as a safer option to avoid damage.