:: Bi-directional Static Load Test

”No overhead reaction, no tie-down piles – A truly innovative static load testing technique”


Bi-directional Static Load Test
is truly an innovative static load testing technique. It is the only load test that provides separate measurement of a pile’s end bearing and skin friction. The reaction system in Bi-directional Static Load Test derived from the soil and/or rock along and below the drilled shaft, hence the system is not restricted by the limits of overhead structural beams, large kentledge, tie-down reaction piles and deep cut of level as in the conventional top loaded static load test system.

No job has been too big or too small to enjoy the advantages of the Bi-directional Static Load Test. To date, we have completed over 160 such tests over 9 countries under various authorities. The highest bi-directional load test we have carried out is 100MN. Our track records fully demonstrated our capabilities to undertake pile load test of any size.


 
Testing Methodology

Hydraulically-driven, high-capacity, sacrificial bi-directional hydraulic jacks are pre-installed in the test pile. Loading is applied in equal and opposite directions: upwards against upper skin friction and downward against lower skin friction and/or end bearing. By using multiple bi-directional jacks on a single horizontal plane, the available test capacity can be more than 100MN. By utilizing multiple bi-directional jacks on different planes, distinct elements within a shaft can be isolated for testing.


Since the end-bearing and upward skin friction are measured separately, there is no guesswork in how much load was carried by each section. We can also incorporate strain gauges within the shaft and analyze data and prepare engineering report to determine the distribution of load throughout the shaft length. The speed and accuracy of testing have made the Bi-directional Static Load Test a valuable tool for value engineering.


Bi-directional static load tests in Malaysia are carry out by Load Test Sdn Bhd, a wholly-owned subsidiary of Soil Dynamics (Malaysia) Sdn Bhd.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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