Wheatstone LNG is a liquefied natural gas plant under construction in the Ashburton North Strategic Industrial Area and is located 7.5 miles west of Onslow, Western Australia, expected to cost US$29.7 billion. The LNG liquefaction and export plant will have an annual capacity of 15 million tonnes of LNG. Bechtel Oil & Gas Chemicals Inc. is undertaking the design of the onshore gas plant, and awarded the design and construction of the LNG storage and condensate tanks to EVT, a joint venture between Entrepose Contracting, VINCI Construction Grand Projects and Thiess.

EVT contracted the deep foundation works for the two LNG storage tanks to Menard Bachy Pty. Ltd., while MBPL sought out Bermingham’s expertise in pile driving equipment and construction. Bermingham provided three systems of 33-meter L23 VTL with a B64 diesel hammer mounted on three different cranes. Along with renting the three pile driving systems, Bermingham provided key personnel to help start the job, train MBPL employees and service the systems.

Courtesy of GRL Engineers, Inc.

Over the course of the past several years, GRL Engineers, Inc. (GRL) has introduced a series of six “APPLE” drop hammers. The devices are used in dynamic load testing of any type of deep foundation (ASTM D4945 Standard Test Method for High- Strain Dynamic Testing of Piles), in cases when a pile driving hammer or another suitable drop weight is not readily available at a jobsite.

GRL has now added two more APPLES to the lineup. The APPLE VII is designed specifically to test helical piles. The APPLE VIII is a modular system with a maximum ram weight of 80 tons – double the maximum weight of the APPLE IV, previously the largest of GRL’s drop hammers. With this addition, the APPLE devices now cover a large range of test loads, up to 8,000 tons under ideal conditions.

Dynamic load tests are an economical alternative to static load tests, and may also meet the requirements of the Rapid Load Test standard ASTM D7383, particularly with the availability of the heavier APPLES. Prior to the test, GRL performs an analysis and recommends an adequate APPLE for each situation, from micropiles to large, high capacity drilled shafts. After the test, it furnishes a detailed test report that includes a simulated static load test in the form of a calculated load-set curve.

Courtesy of Liebherr

In recent years, Liebherr’s deep foundation equipment has become increasingly popular on the North American continent, especially in Canada. In the past months, a Liebherr piling rig, a model LRH 100, laid the foundation for a new bridge in Quebec.

The piling rig, owned by the Canadian company Centurion Fondation, was equipped with the large hydraulic hammer H 85/6. Its task was to install about 120 piles with a diameter of approximately 450 mm and total lengths between 30 and 36 metres.

A major challenge on the job was the narrow workspace that offered little leeway for the piling rig to move in any direction. Here, the innovative leader kinematics of the LRH 100 was a great advantage, allowing radii of up to 8.75 metres and inclinations of maximum 18 degrees in all directions. Thanks to this feature, the operator was able to change the position of the leader in all directions without moving the undercarriage.

A heavily frequented highway through the middle of the jobsite was a further complicating factor for the operator of the piling rig. When lifting the piles into the helmet of the hammer, the operator had to ensure that the traffic flow was not disturbed or halted.

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Piling Canada is the premier national voice for the Canadian deep foundation construction industry. Each issue is dedicated to providing readers with current and informative editorial, including project updates, company profiles, technological advancements, safety news, environmental information, HR advice, pertinent legal issues and more.