Key principals of Layne GeoConstruction have been engaged in jet grouting technology and production since its origins in Italy. Many jet grouting techniques and specialized equipment improvements that have become industry standard were conceived and advanced by these individuals. Owing to the extensive knowledge and expertise of its employees, Layne GeoConstruction has been intimately involved in the construction of many of the most challenging jet grouting projects worldwide. Clients of Layne GeoConstruction benefit from the team of highly specialized employees, and commitment to continued enhancement of the jet grouting process.

Civil engineering projects are often designed and constructed on sites that are constrained by existing urban developments, or heavily congested areas. In many cases, improvement of weak underlying soils is required to support loads for the intended project.

Soil improvement modifies and increases the mechanical characteristics of the treated soil, most notably its compressive strength and modulus of elasticity, while concurrently decreasing its permeability. The jet grouting method is one of the preferred systems to achieve these results.

Jet grouting is an in-situ mixing of soils with a stabilizer (usually neat cement grout). The stabilizer is injected at very high pressures (between 300 and 600 bar) through a nozzle of small diameter. The grout is injected at high velocity, which enables the jet grouting process to destroy the natural matrix of the soil and create a mixing of the stabilizer with the in-situ soils. The result is a homogeneous and continuous structural element with predetermined characteristics.

Jet grouting can be applied to a wide range of soils from non-cohesive, poorly graded granular soils to cohesive plastic clays. The jet grouting technique is a preferred alternative to other conventional grout injection methods.