Load Test Under

Low Headroom

600 ton load test under elevated highway

in high traffic and highly constrained site

Damansara Link / SPRINT Interchange / Jalan Maarof

Scope of Works: Reaction Load Test to 600 Tons

Reaction Load Test under low headroom and with heavy traffic

Jalan Maarof, Load Test under Elevated Highway

Reaction Load Test under low headroom in highly congested location

Load Test under low headroom in highly congested location

Development of Damansara Town Centre lead to upgrade of the interchange of Sprint / Damansara Link / Jalan Semantan / Jalan Maarof roads. This is a heavy traffic road network and needed additional elevated highways to be constructed in a location that is already very busy.

Due to lack of headroom and heavy congestion, caisson piles were used for the construction of additional elevated highways.

Shinei was invited to perform a load test on one of the caisson piles.

A kentledge system load test was not possible due to the location and lack of space. We had to use a reaction load test system. Load test was tested to 600 tons.

Key challenges of this project was the assembly of the pile test in a highly constrained working environment. This was due to:

  • Extremely tight workspace with caisson pile is surrounded by heavy traffic on all sides with changing road conditions
  • The need to avoid underground utilities as working space was excavated, pile test beams were set up and when ground anchors were installed
  • Installation of ground anchors under elevated highway

Mobilisation of plants and equipment had to be done at night as the public road is busy throughout the day and much of the works were carried out during the night.

These ground anchors have to be installed some distance below the caisson pile in order to avoid any interference during the loading stage. The length of installation in weathered to sound rock is 17.0 m.

Tension anchors had to be carefully installed with great precision. Extreme care and study was required to avoid any damages.

Additional safey measures were taken to cover the work area, the public road, the underground utilities and safety of workmen at the site.

Adequate canvas roofing system was set up to protect the entire test set up and site personnel against wet weather.

Upon completion of the load test, a full report was prepared for consultant's approval. The pile test was conducted to a satisfactory level.

Reaction Pile Test in area with a lot of underground utilities

Pile Test in area of high underground utility

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About the Author

Ir Tan Chin Shu is a Geotechnical Engineer with over 40 years’ experience in the foundation and geotechnical engineering industry. He is the founding Director of Shinei Geotechnique, a specialist contractor in Malaysia.