软土地区深大基坑工程施工监测分析技术研究

Subjects: Civil Engineering and Building Construction >> Civil Construction Engineering submitted time 2017-12-21 Cooperative journals: 《土木建筑工程信息技术》

徐菁

Abstract： The influence mechanism of deep and large foundation pit construction in soft soil area is very comalex. This paper uses on-site monitoring method to explore the disturbance of deep foundation pit construction in soft soil area on the foundation pit surrounding environment，and studies the variation law with the excavation of the deformation and supporting axial force of the foundation pit，as well as the pore water pressure around the foundation pit during the excavation process of deep and large foundation pit. The research shows that the stress release from the excavation leads to the uplifting of the soil at the bottom of the foundation pit and the loosening of the soil around the foundation pit to the direction of the foundation pit. The vertical surface displacement superposition effect decreases with the increase of excavation depth，and the maximum vertical displacement of the position appears at the middle of two pits. Along with the continuous construction，the impact on the underground continuous wall gradually disappears. The pore water pressure decreases sharply with the increase of time，and keeps stable later. The research results can provide theoretical basis and early guidance for future construction.

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