Ground Stabilization
Due to severe damage to urban functions experienced in recent earthquakes, higher seismic performances of infrastructures and industrial facilities, such as power plants or oil and gas plants, are preferred in seismic regions worldwide. However, this requires higher design seismic force, which provides higher construction costs. Performance-based seismic engineering is now an established technology for the more economical design of structures to resist earthquakes. We propose an economical method to reduce the seismic actions on the tank structures and show their effectiveness on relatively stiff ground.
Discrete elements or continuous panels are used as reinforcement to improve the overall performance of weak and large compressible soil masses. Ground improvement is the controlled alteration of ground materials' state, nature, or mass behavior to achieve an intended satisfactory response to existing or projected environmental and engineering actions.
Deep Soil Mixing (DSM), RAS Column, and Shallow Soil Mixing (SCM) methods are effective for improving the soil-bearing capacity of building foundations, preventing settlement for foundations under future structures such as storage tanks or LNG plants, and stabilizing contaminated soils in situ for environmental remediation, among other uses.
Project Example: Presidio Parkway
DSM was designed to be installed into the dense Colma Sand 2’ to 5’. The General Contractor designed a temporary excavation support wall with wide flange beams, some on two-foot centers, and 45 beams total. This project supports the structural concrete for the new US 101 highway, tunnels, and bridges.