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Dynamic Compaction

Soil Improvement with Dynamic Compaction Dynamic Compaction consists of using a heavy tamper that is repeatedly raised and dropped from varying heights to impact the ground. The mass of the tampers generally ranges from 10 to 30 Tons, and drop…

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Sonic Drilling

Sonic Drilling is well suited for a wide variety of applications.  What sets this technique apart from conventional drilling techniques is the ability to easily adapt to a wide variety of soil and rock types with minimal tooling change.  Sonic…

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Cut and Cover

The new Sutter Health Van Ness Geary Campus includes a pedestrian tunnel underneath Van Ness Avenue in San Francisco. Van Ness Avenue is designated US 101 - the main north south route through San Francisco over the Golden Gate Bridge.…

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Oil Well Abandonment

The Gerald Desmond Bridge in Long Beach, California spans the Wilmington Oil Field – one of the largest oil fields in the continental United States, with more than 6,000 oil wells. In order to construct the new bridge, all active…

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Underpinning

Malcolm’s underpinning systems allow excavation adjacent to and directly below sensitive structures and facilities. Low vibration and sequenced construction techniques are employed to provide vertical load capacity while maintaining ground support. After new support systems are installed, load is transferred…

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