سنة النشر

2018

العنوان

Theoretical Verification for Full-Scale Tests of Piled Raft Foundation

الخلاصة

Piled-raft foundation is a three-dimensional problem, which requires three-dimensional modelling. Numerical modelling of experiments was carried out to get compatible agreement between the behavior of piled raft foundation and theoretical simulation. Two verification problems were simulated from the real field tests (1 × 1, 2 × 2) by using the program PLAXIS-3D. The soil behavior was modelled by using the HS-small model, while the piles and their cap were modelled by using linear elastic model. It can be noted that the soil stiffness and the strength model parameters have limited effects when remaining within acceptable range. It is believed that the stiffer behavior is due to installation effects that increase soil horizontal stresses and enable larger shear mobilization. This can be introduced in the model by artificially increasing K0ini. K0 should be increased to very high values (3–3.5) along with increasing dilatancy angle. It can be realized that there is a very good matching between the finite element and experimental results. Since this verification is based on real field tests, so it can be given a great reliability for the study of several variables associated with piled raft system, based on the material properties of the theoretical model that has been obtained from these simulations. © Springer International Publishing AG 2018.