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شمع مارپیچ
Patented pier or pile systems such as micropiles, helical piles, or steel push piers are the most commonly used underpinning systems.
Helical piles con- sist of one or more helices 8 in. to 14 in
The helical pile is turned into the ground using a form of power auger or hydraulic torque motor.
It demonstrates the use of an econom- ical and innovative geophysical method to determine the length of exist- ing push piers and helical piles.
It also demonstrates the need to use an appropriate remediation method and the advantage of using micropiles over push piers and helical piles in highly overconsolidated clays.
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