The total value of load on the plate divided by the area of the steel plate gives the value of the ultimate bearing capacity of soil. The test load is gradually increased till the plate starts to settle at a rapid rate. It basically consists of loading a steel plate and recording the settlements corresponding to each load increment. The Plate Bearing Test is carried out in accordance with BS 1377 Part 9: 1990. Approximate equivalent CBR values can be derived from the Modulus of sub grade reaction by use of mathematical relationship. The Plate Bearing Test is typically used in the design of temporary working structures such as working platforms for piling rigs or pads for crane outriggers. ![]() The strength and variability of the near surface ground is critical for the design and operation of working platforms. It can be carried out by either using a gravity loading or a truss loading method. A Plate Load Test is a load bearing test used for determining the ultimate bearing capacity of the ground and the likely settlement under a given load.
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