Stone columns also known as aggregate piers are well suited for the improvement of soft or loose soils as they create vertical inclusions with high stiffness, shear strength and draining characteristics
Dynamic compaction is a ground improvement technique that densifies soils and fill materials by using a drop weight. The ground is subjected to repeated surface tamping using a heavy steel and concrete weight. Typically the tamper weighs between 10 and 12 tonnes, dropping in free fall from heights of up to 10 metres.
This densifies shallow, granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface.
Jet Grouting creates soil columns using high-pressure grout injection. High-velocity jets of grout (and sometimes air or water) are pumped through a grout monitor attached to a drill string, mixing the soil as the string rotates. A pre-construction test program is recommended to calibrate and verify the design and jet grout parameters.
Stone columns also known as aggregate piers are well suited for the improvement of soft or loose soils as they create vertical inclusions with high stiffness, shear strength and draining characteristics. Stone Columns are constructed in following steps:
This densifies shallow, granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface.
Is one of the practical methods of ground improvement technique which produces cement soil columns and modification of soil characteristics by injecting stabilizing materials such as cement or lime using a mechanically hollow drill in the soil.
Jet Grouting creates in-situ columns of grouted soil using very high pressure grout injection. Grouting is performed by pumping high velocity jets of grout (or sometimes grout and air or grout, water and air) through the side of a grout monitor, attached at the end of the drill string.
The jets erode and mix the soil as the drill string and the monitor are being rotated and withdrawn.It is best practice to perform a pre-construction test program to calibrate, adjust and verify jet grout parameters and the design.