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LATERAL STATNAMIC LOAD TEST EQUIPMENT

Lateral Statnamic load testing is a significant contribution to the engineering community since it models more closely lateral loading events, i.e. wind, seismic, ship impact, wave action, etc. and it does not require the construction of a costly reaction shaft. An analysis method developed at Auburn University allows quantification of both dynamic and static lateral capacity components from a Statnamic lateral load test. The same Statnamic equipment used to perform axial load tests is assembled horizontally on a special “sled”. The lateral load produced is transmitted to the foundation through a large hemispherical bearing that is forgiving to rotations typical of lateral load tests. Specialized down hole inclinometer instrumentation has been patented to measure rapid lateral foundation responses during these Statnamic tests which is shown in Figure 29. Full-scale lateral load tests are possible like the world record 1100-ton lateral Statnamic load test shown in below. Lateral Statnamic load tests may be performed between loads of 15 tons to 2000 tons. Lateral load testing accounts for approximately one third of all Statnamic load tests.

1100-ton lateral Statnamic load test performed on a pair of drilled shafts for the US 17 Bridge over the Northeast Cape Fear River in Wilmington, North Carolina.

1100-ton Lateral load test in progress.

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