关键词: 斜坡, 碎石土, 水平荷载, 桩基础, 现场试验

Abstract: The behavior of a laterally loaded pile is sophisticated and diverse when it is loaded on the sloping ground. For the gravel soil as a typical strata of western Sichuan province of China, very limited research works have been carry out to study laterally loaded piles in gravel soil ground. In order to study the horizontal load-bearing characteristics and the interaction between pile and soil of the single pile embedded in the gravel soil slopes, a field test is conducted to investigate the single pile response varying gravel soil slope gradient. Slopes with gradient 0°, 15°, 30° and 45° are chosen, and the study includes pile deflection, bending moment, and earth pressure. The finite element analysis software FLAC3D is used to obtain the pile-soil stress field nephogram and displacement field nephogram for different gradient slopes. Furthermore, comparing field test results with numerical simulation results of critical load and ultimate load of pile in different slope ranges provides a reduction coefficient for the existing methods proposed in design. In summary, the study in this paper provides a reference for future practical engineering applications.

Key words: slope, gravel soil, lateral load, pile foundation, field test