Research on cast in-situ pile load bearing capacity characteristics in hand made excavation

Under special domestic conditions in yunnan province of complicated geological formation, different climatic conditions as well as uneven topography and relief, hand made excavation for cast in-situ piling, using on a large scale primary finite element software ADINA, a detailed research on the factors influencing the working mechanism, pile cap subsidence and end resistance is done. Load versus displacement graph is basically divided into 3 stages; During pile-soil interaction process, the soil body around the pile appears to take a shape of centre of basin type as in a subsidence state, pile end resistance continues to increase as pile cap load increases. At the same time load sharing with the extremity ends of the pile also continues to increase.