Bi-Directional Static Load Test

Bi-directional Static Load Test (BDSLT) is a reliable MLT option for large diameter piles that is widely used in the market. The key difference between a conventional top-loaded maintained load test and a BDSLT is the location of the jack.

In BDSLT, a sacrificial hydraulic jack is positioned at an equilibrium resistant point (determined based on the results of soil investigation). The load is applied onto the pile in two directions, that is, upward and downward. With BDSLT, the rock socket or the lower section of pile is able to be mobilised fully, which normally will not be achieved with a top-loaded test.

 

BENEFITS:

  • High test load capacity
  • Improved safety, as no risk of the collapse of the reaction system
  • Minimal space and access requirement
  • Ease of installation, saves time and cost
  • Pile extension to ground level is not necessary (ideal for pile with deep cut off level)
  • Unique conical shape allows the concrete to flow freely and smoothly. Able to flush debris up and prevent concrete contamination below jack.
  • Conforms to ASTM D9169/D8169M
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