High Vacuum Decificaiton Method
HVDM stands for High Vacuum Densification Method. It is an innovative technique that combines vacuum dewatering and low-energy DC method to improve saturated soft silt/clay soil, even sand with high fine content . The method involves the application of high vacuum pressure to a material in order to decrease its porosity and increase its density . This technique is used for ground improvement and is particularly useful for soft soil soft cohesive soil.
Common uses
- Road Construction
- Airport Runways
- Land Reclamation
- Storage Facilities
- Settlement Mitigation
- Infrastructure Projects
- Rehabilitation of Aging Infrastructure
- Liquefaction Mitigation
Process
High Vacuum Densification is a process used to increase the density of the foundation material. The process involves the removal of air and other gases from the material by subjecting it to a vacuum of very low pressure. Following are the steps used in adopting HVD technique.
- Ground Preparation
- Installation of drains
- Dynamic Compaction
- Release of water through the drains
- Releasing of porewater pressure
- Cooling and Venting
High Vacuum Densification M is commonly used in the production of advanced ceramics, sintered materials, and in some aspects of powder metallurgy to improve the mechanical and thermal properties of the final product. It’s a crucial process for achieving high-quality, dense materials with low porosity.
Advantages
- One of Geoharbour group’s patented technologies
- Suitable to improve soft Silt/Clay Soil and also soil that has fines content with a high ground-water table, such as silty sand and clayey sand
- The combination of vacuum drainage (- pressure) and dynamic compaction (+ pressure)
- Effectively dissipates excess pore water pressure
- Improve the soil through the effects of decreasing water content and increasing density
