Testing method and device for coefficient of subgrade reaction test

摘要

A testing device for foundation bed coefficient test comprises a pressure cabin (2); a cylindrical emulsion film (17) adhered in an inner cavity of the pressure cabin (2); a lower water-permeating plate (14), a sample (9) and an upper water-permeating plate assembly provided from bottom to top in sequence on a base seat of the inner cavity of the pressure cabin (2). An outer pressure plate (16) is connected with an upper water-permeating ring plate (15) of the upper water-permeating plate assembly. An inner pressure plate (21) is connected with an upper water-permeating inner plate (20). The outer pressure plate (16) is sleeved out of the inner pressure plate (21). A flange disk (22) is sleeved on a force transmitting sleeve of the outer pressure plate (16). The flange disk (22) and the pressure cabin (2) are connected by a bolt. A supporting bolt (23) on the flange disk (22) contacts with the outer pressure plate (16). There is a slot in the base seat of the pressure cabin (2), and a drainpipe (10) is provided in the slot. A three-way valve (24) is provided on the drainpipe (10). A pressure sensor (11) is connected with one end of the three-way valve (24), and a lower branch drain pipe (19) is connected with the other end of the three-way valve (24). The pressure sensor (11) is connected with a collector (12), and the collector (12) is connected with a computer control system. A hydraulic cavity volume adjusting cylinder (5) and a fully automatic hydraulic controller (6) of a side pressurizing device are connected to the inner cavity of the pressure cabin (2) respectively. A testing method for foundation bed coefficient test includes using the said testing device for foundation bed coefficient test to determine the foundation bed coefficient.