drilling & geotechnical

PT. GEONUSA UTAMA

Erri Hendriawan
erri@geonusa.com
HP: +62 812 960 8187

Thrusted solution... for your peace of mind

MICROPILES

Micropile Applications:

Supporting New Loads in Congested Areas
Seismic Retrofit
Arresting Structural Settlement
Resisting Uplift/Dynamic Loads
Underpinning
Excavation Support in Confined Areas
Reticulated Pile Wall

micropile types

Types of Micropiles

Pushed or Driven
Compaction Grouted
Post Grouted
Pressure Grouted

Important Micropile Parameters

Soil characteristics at pile shaft/soil
interface Rock at pile tip

Benefits of Micropiles

High-performance
Design loads from 3 to 100+ tons
Can be readily designed for tension/uplift loads
Appropriate for a wide range of ground conditions
Suitable for low headroom and restricted access
Low noise and vibration
Can penetrate obstacles

Micropile Design Steps

Geotechnical study
Determine load to be supported
Design pile-to-structure connection
Design pile-to-soil or rock load transfer
Develop a pile testing program

Micropile Quality Control

Test selected piles to two times the static design load using standard ASTMD113 pile load test criteria

Typical Micropile Programs Involve

Drilling holes, 2 inch to 12 inch diameter
The construction of a pile shaft consisting of structural steel pipes, grout, steel sections and/or placement of reinforcing steel, as required by design
The filling of the hole with high-strength cement grout

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