Micropile MS

Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

MICROPILE UPLIFT LOAD TEST METHOD STATEMENT Objective : To Test Skin Friction Only a) The test pile is constructed to protrude above the ground level approximately 300mm with permanent casing installed. b) Prior to grouting the pile, 6-8 Nos of 0.6” anchor strands are embedded and tied to the last reinforcement cage of the pile at the top. The embedment or lap length of these anchor cables depend on the test load as per the drawing. c) Grout the micropile and leave for at least 7-days for grout to be sufficiently hardened. d) Assemble the reaction frame system as shown in Diagram 1. The anchor cable shall be locked into an anchor block (head) on the I-beam. Tie-rods and stiffener plates installed will stabilize the system. e) A sewer jack (multi-strand) hydraulic jack is placed atop the I-beam, which will pull all anchor strand when stressed. f) A calibrated load cell reacting against the hydraulic jack and the anchor block is placed with the use of centralizer blocks if necessary. g) Fix four (4) nos. dial gauges on an independent ‘pipe frame’ to measure the pile head displacement. h) All testing equipment shall be protected from unnecessary disturbance prior to and throughout the load test. i) The loading sequence shall follow the client’s specification including the step and duration. j) Records shall be kept promptly throughout the testing period. A copy shall be extended to the Superintending Officer at the end of the test.

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Diagram 1 – Section view of Uplift Test Setup using two reaction piles and a sewer hydraulic jack.

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Diagram 2 – Plan view of Uplift Test Setup system.

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Loading Sequence for Tension Testing (Quick Load Test) The Quick Load Test Duration for Tension Testing will be used as follows :

% Working Load

Duration (min)

0% 5% 10% 15% 20% 25% 30% 35% 40% 35% 30% 25% 20% 15% 10% 5% 0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200% 225% 250% * …* Release in stages until 0%

0 5 5 5 5 5 5 5 10 5 5 5 5 5 5 5 10 5 10 5 5 15 5 5 5 5 5 5 5 …* 5

Note : * To continue test up till pile failure or reaching testing equipment capacity.

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Photo 1&2 : The setup of the quick load uplift test beam, jack, dial gauge & theodolite

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Photo 3&4 : The dial gauge setup with a level check for frame used in this test

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Micropile Uplift Load Test Method Statement GEOPROFOUND ENGINEERING SDN BHD

Photo 5 : Hydraulic Jack setup with load cell attached and anchor head.

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