HU Qi, LING Dao-sheng, CHEN Yun-min, et al. Study of loading characters of pile foundation due to unloading of deep foundation pit excavation[J]. 2008, 29(7).
HU Qi, LING Dao-sheng, CHEN Yun-min, et al. Study of loading characters of pile foundation due to unloading of deep foundation pit excavation[J]. 2008, 29(7).DOI:
Due to unloading of deep foundation pit excavation
piles of underground structure will be applied skin friction in advance. This friction will endanger the underground structure and pile foundation if not be managed properly
and it will be more difficult to calculate the capacity and rigidity of pile due to this friction. According to the effect of stress path and stress level to the rigidity of soil
a new interface model considering the influence of deep foundation pit excavation is established. The friction parameters of interface model is confirmed by stress path test. Compared the results of different excavation depths
the influence of excavation on the skin friction
capacity and rigidity of pile is gained. The results show that it is unsafe to use the capacity and rigidity of pile under the conditions of earth covering.