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Ground improvement technology - Stone Column Technology - Band Drain technology

Ground improvement technology - Stone Column Technology - Band Drain technology. C-PHI | Geotech. Abandon the site and locate the structure elsewhere Design deep foundations to carry the weight of the structure to competent stratum Redesign the structure according to the ground conditions

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Ground improvement technology - Stone Column Technology - Band Drain technology

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  1. Ground improvement technology- Stone Column Technology- Band Drain technology C-PHI | Geotech

  2. Abandon the site and locate the structure elsewhere • Design deep foundations to carry the weight of the structure to competent stratum • Redesign the structure according to the ground conditions • Improve the properties of the ground prior to construction Alternatives for inadequate ground?

  3. Densification of the ground , E.g.: Compaction • Accelerate the consolidation, E.g.: Vertical drains • Usage of geo synthetics, E.g.: Geotextiles • Usage of admixtures, E.g.: Cement stabilization • Preloading • Mechanical Stabilization Basic principle of ground improvement Ground improvement is the modification of the ground properties in order to achieve the required ground conditions for the particular use of the ground.

  4. BAND DRAIN TECHNOLOGY

  5. Used in loose, compressible and water saturated clay and silty clays. • Soils are characterized by very loose skeleton and a large pore sizes filled with water • Requires about ten or more years to consolidate on preload. PVD – Prefabricated Vertical Drain. BAND DRAIN TECHNOLOGY - PVD

  6. Consolidation takes place in only one direction • Vertical drainage path may be substantially longer • It may take 10+ years to consolidate What is vertical drain? • Pore water will flow laterally • Pore water pressure dissipates as the layer drains and water is conveyed through vertical drains • It takes only about 6months or so to consolidate

  7. Core : It is called drained body corrugated, flexible and made of polypropylene, designed to provide high discharge capacity, high tensile and compressive strength. • Filter Jacket: Non – woven ,thermically bonded polypropylene wrapped around the core. Acts as the filter to allow ground water to the core. Components of pvd? Core Filter

  8. Minimum disturbance to the soil layers during installation • High water discharge capacity • High tensile strength prevents the collapse of flow path. • Fast and easy installation • Deep installation up to 40m. Advantages of BAND DRAIN TECHNOLOGY:

  9. Case Study: INSTALLATION EQUIPMENT • Hydraulic Stitcher • Mandrel • Base Hydraulic Machine

  10. CASE STUDY: BAND DRAIN INSTALLATION

  11. CASE STUDY: BAND DRAIN INSTALLATION

  12. After the installation of band drains, Casagrande peizometer and plate type settlement recorders where installed in order to check the settlements CASE STUDY: BAND DRAIN TECHNOLOGY

  13. THANK YOU! For more information, Please contact: C-PHI | Geotech Website: www.c-phi.com Email : cphi@c-phi.com

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