Geotechnical Engineering Strain Intensity Distribution Parameter Monitoring and Centrifugal Mechanics Sensitivity Analysis

Abstract

With the construction of large and important projects, high-strength pile composite foundation, pile foundation and composite pile foundation are more and more widely used in foundation treatment. The study of pile-soil interaction can not only enrich the theoretical content of foundation treatment, but also has important engineering significance in optimization design. Based on the centrifugal model test technology, this paper adopts a set of self-designed loading devices. The model piles equipped with miniature load cells at different sections are subjected to a single pile loading test after the centrifuge reaches a stable operation state, and the pile length and the influence of the strength change of the pile tip soil on the load transfer law of the pile body and the pile-soil interaction characteristics. The results show that as the pile top load increases, the change in the soil stress around the pile caused by the pile side friction also increases. Under the influence of a certain pile side friction, the change in soil stress around the pile shows a tendency of attenuation in the radial direction of the pile. For the section with large side friction, the corresponding stress change of the soil around the pile is larger and the side friction resistance is small. For the section, the corresponding stress change of the soil around the pile is reduced accordingly.