jet grouting

Use of micropiles and jet grouting are common methods in underpinning.

"Jet grouting is a specialty contracting business.

Mr. Forman called Nicholson and Rodio highly regarded companies, among the best in the specialized field of jet grouting.

In jet grouting, a machine drills into the earth, sucks out a column of dirt and injects fast-drying grout, a kind of cement, in its place.

Ground improvement, consisting of triple-fluid jet grouting, was performed to reduce the compressibility of the silty clay, stiffen the sand deposit and provide a desirable shallow foundation system.

New stairs and passages are being added to the Canal Street station, and as part of that project, a subcontractor was using a technique called jet grouting to shore up the loose, moist soil.

Jerome Forman, the Transit Authority's vice president for capital program management, said officials believed that the accident occurred Thursday night, as a crew working on a subway rehabilitation project for a city subcontractor was performing a difficult excavation process known as jet grouting.