CHEMICAL GROUTING
Nicholson Construction Company is an unquestioned leader and pioneer in the use of grouting technologies. One of these pioneering techniques is the use of a form of permeation grouting -- chemical grouting -- which uses grout to fill voids in the soil with chemical solutions.Chemical grouting is commonly used in granular soils with significant fine sand content to stiffen the ground and prevent excessive movement, to lower the permeability of the soil to prevent excessive water inflows, and to underpin adjacent buildings and other facilities in advance of the tunnel excavation.
A key advantage of chemical grouting is the ability to introduce grout into soil pores without any essential change in the original soil volume and structure, thus changing the support capability of granular soils without disturbing them.
Another key advantage is the ability to be less disruptive and enable tunneling to proceed without over-excavation.
Nicholson also understands the recent and increasing concern regarding potential pollution by chemical grouting in urban areas, and we have been leading the way in addressing the issue through:
- Improvement of grouts through the development of new formulae that enhance the penetrability of particulate suspensions and meet the strictest specifications for environmental safety.
- Development of alternative techniques which by-pass the penetrability restraints, such as jet grouting which allows the treatment of most types of soil, independent of its grain size and permeability, using simple cement grouts.
Nicholson has the experience and value-added engineering capabilities to develop the most viable and cost-effective solution for the use of chemical grouting techniques. To learn more about Nicholson chemical grouting techniques or any other specialty techniques, please call 412-221-4500 or contact us today.
Michigan Street Tunnel, Grand Rapids, MI
Nicholson injected chemical grout to support the open-face tunneling of a pedestrian tunnel.