This test is used to find the ultimate bearing capacity by the load-settlement curve. A test plate square or circular in the shape of size either 30cm,60cm,75cm but in no case less than 30cm and thickness 25cm. A large size plate is used for loose or soft soil and a smaller size plate is used for dense or stiff clay. The plate act as a model of a prototype foundation. Loads are applied on test plate in an increment of 20% of estimate safe load up to failure or at least a settlement of 25mm or total settlement exceed 10% the width of plate (whichever is earlier).
Plate load test, take a look at, even though beneficial in acquiring the vital records approximately the soil with unique connection with the layout of basis has a few limitations. The take a look at outcomes mirror simplest the individual of the soil positioned inside an intensity of much less than two times the width of the bearing plate. Since the rules are commonly large than the take a look at plates, the agreement and shear resistance will depend upon the residences of a miles thicker stratum. Moreover, this approach does now no longer supply the closing settlements mainly in case of cohesive soils. Thus the outcomes of the take a look at are in all likelihood to be misleading if the individual of the soil modifications at shallow depths, which isn’t always uncommon. A quality load takes a look at should, therefore, encompass ok soil exploration ( see IS: 1892-1979* ) with ~due interest being paid to any weaker stratum underneath the extent of the footing.
The plate load test is conducting to find out the Safe bearing capacity of Soil. Based in this bearing capability structural engineer layout the building( length of the basis, pillar .. and so forth together with the metallic reinforcement required). Bearing capability of Hard Strate of soil like Murum is from 15MT/ square to 25MT / square. Bearing capability of rock is 35MT/ square to 80MT / square, relying at the form of rock like Sheet Rock, Rock boulder, smooth rock & difficult rock. The load takes a look at on a pile basis is to confirm the load-bearing capability of the pile in par with the layout load.