MICROPILE SLIDE STABILIZATION
The Applications
Landslides
Creeping Slopes
Side Hill Fill Applications
Loosened Soil: Post-Treatment
Quality Control / Quality Assurance
Inclinometer results are generally the determining factor to verify that slope movements have arrested after completion of the system.
Construction Process
Installation of the system for slope stabilization begins with construction of a concrete beam near the ground surface. Angled micropiles, in a fan array typically composed of three structural elements, are then drilled in place through the beam and founded in a competent stratum.
Geotechnical Considerations
Several conditions must exist in order for micropile walls to yield best results:
Access must be such that you can reach the approximate mid-point of the failing slope with men and equipment.
The reinforced concrete cap may be installed before or after drilling and grouting of the micropiles.
Some walls may also require tieback anchors to be installed and stressed against the concrete cap if landslide forces are enormous.
Sequencing of pile and tieback installation is important.
Walls with rock drilling for micropile sockets are more expensive than soil only walls. Applicable in almost all soil types up to depths to failure plane of 15m.
Advantages of a Micropile Slides Stabilization System
Little or no excavation is required
Speed of installation
Wide applications range
Effective in a variety of soil conditions
Environmentally friendly – walls can be buried and made invisible
Non-hazardous
Economic alternative to tieback walls
Minimal impact to surface environment
