Shandong University of Science and Technolog
It is a new method for underground space development to upgrade the underground space of existing buildings. The existing supporting piles and newly added supporting piles constitute the composite supporting structure in the underground space downward storey increasing project. The bearing characteristics of the composite supporting structure in the whole storey increasing excavation process were studied by model test and finite element analysis. The research shows that the bearing capacity of existing supporting piles and newly added supporting piles is in a dynamic change with the excavation of additional layers. In the early stage of layer adding excavation, the existing supporting piles are the main load bearing members, while the newly added supporting piles play a role in embedding. In the middle stage of adding layer excavation, the load value of existing supporting piles and newly added supporting piles increases, and both of them are loaded members. In the later stage of the excavation, the bearing capacity of the newly added supporting piles is gradually greater than that of the existing supporting piles, and the existing supporting piles are gradually damaged, and the newly added supporting piles are the main load bearing members.
孔德森,孙添娇,赵新媛,等. 既有建筑地下空间向下增层组合支护结构承载特性研究[J]. 科学技术与工程, , ():复制