PLATE BEARING TEST:

AS PER IS: 1888-1962.

Introduction: This is for estimating the bearing capacity of shallow foundations in situ and for the design of flexible pavement. In the test procedure a steel plate is subjected to gradually increasing load and settlements of the plates recorded. Maximum bearing capacity is noted as that load at which the plate starts sinking rapidly.

General Description and Specifications: The basic outfit consists of:

• 50 Ton Hydraulic jack with separate pumping unit fixed to it a 0-500 KN x 0.5 KN Pressure gauge and flexible metal pipe 5 mtr long – 1 No
• Special ball and socket arrangement between the jack and the bearing plate – 1 No.
• Extension rod 12 mm dia x 25 cm long for taking dial gauge readings - 16 Nos.
• Magnetic base with female thread on top for holding extension rod - 4Nos.
• Top end plate, 50mm, dia with male thread for fitting onto the extension rods and positioning the dial gauge plunger - 4 Nos.
• Column 15cm.dia x 25cm long with flanges complete with four bolts and nuts - 2 Nos.
• Column 15cm.dia x 50cm long with flanges complete with four bolts and nuts - 1Nos.
• Bridge support of welded steel angle construction, 5 mtr span and stands approximately 30cm high, Fitted with two quick release clamps a for positioning and holding the dial bracket -2 Nos.
• Plane M.S. Plate 60cms x 60cms. square x 25mm thick Plane M.S. Plate 45cms x 45cms square x 25mm thick Plane M.S. Plate 30cms x 30cms square x 25mm thick Dial Gauge 0.01mm x 25mm - 4Nos.

Accessories:

• Plane M.S. Plate 75cm x 25mm thick
• Plane M.S. Plate 50cm x 25mm thick
• Grooved M.S. Plate 60cms x 60cms x 25mm thick
• Grooved M.S. Plate 45cms x 45cms x 25mm thick
• Grooved M.S. Plate 30cms x 30cms x 25mm thick
• Grooved M.S. Plate 75cms x 75cms x 25mm thick

Note:

1. When plates of size more than 30cm.sq. are used, in order to prevent deflections of the edge, a series of smaller plates are advised to be placed concentrically on the bottom plate.

2. Flexible rubber pipe 1 mtr length can be supplied for the hydraulic jack in place of metal pipe at extra cost. For site testing load trusses to meet the reaction of loading are available in different capacities as under.