Bearing Capacity and Deformation Characteristics of Dense Medium Sand Layer of Weihe First-order Terrace

Based on a project in the Weihe first-order terrace in Xi'an, the bearing capacity and deformation characteristics of the dense sand layer foundation were studied through field tests and numerical simulations to determine whether natural foundations for high-rise buildings of nearly 100 meters can be built in similar sites. The results show that: the P-s curve of the load test of the dense sand layer in the Weihe first-order terrace is gently variable, the characteristic value of the bearing capacity of the foundation can be 600 kPa, and the deformation modulus can be 40 MPa. The empirical coefficient Ψ_S can be taken as 0.2 for the calculation of foundation settlement by the sum-of-layers method for similar projects in the Weihe first-order terrace. When the geological conditions are similar, it is feasible to use natural foundations for the construction of high-rise buildings of nearly 100 meters. The results can provide a reference for the adoption of natural foundations for high-rise buildings on the Weihe first-order terrace, and also provide empirical parameters for deformation calculations on similar sites.