Summary:
These Micropiles provided foundation support for a residential apartment building placed over an existing ravine with 23 Ft of fills overlying very dense native sandstone bedrock.Date:
Not availableClient:
Vanbots Construction Inc.
Factors Influencing the Choice of Micropiles
1. Physical considerations: Restricted access, remote access, close proximity to existing structures
2. Subsurface Conditions: Difficult geologic conditions (boulders in till or obstructions), Susceptibility of ground to liquefaction during pile driving
3. Environmental Conditions: Vibration or noise sensitive areas, hazardous or contaminated soils
4. Economics
5. Low mobilization compared to driven piling
Micropile Applications
- Foundations for new structures
- Underpinning existing foundations
- Seismic retrofitting
- Earth retention
- Settlement reduction
- Structural stability
On-site pre-production compression testing, as shown, was conducted to 150 Kips = 667 kN in order to confirm capacities.
Micropiling was considered economical here due to unsuitable soft sub-grade bearing soils, close proximity to existing foundations/sewer, obstructions in fills and low noise emissions.
