Field Test Study on Vertical Bearing Characteristics of Coal Rock

Coal rock is rarely used as the foundation bearing strata. For buildings located on coal rock, it a reasonable and feasible way to obtain vertical characteristics of through field tests. Three plate load tests two bi-directional were carried out, design parameters capacity shallow deep obtained, respectively. The test results show that pressure–settlement curve steep-drop-type, deformation modulus decreases with increase pressure. unit tip resistance-displacement transfer function resistance an ideal elastic–plastic curve, displacement value corresponding ultimate about 1% pile diameter. side hyperbolic curve. equivalent top load–settlement obtained according functions consistent conversion method.