Deformation analysis of deep foundation pit excavation in China under time–space effect
Qingwei Zhang
Abstract
The excavation of a deep foundation pit often causes deformation, so it is of great value to analyse the issue. In this study, the space–time effect of foundation pit deformation was introduced, and then the deformation of a deep foundation pit in Anyang, China, was monitored and analysed. The results showed that the displacement of the foundation pit enclosure structure increased gradually with the progress of the project, and there was a gap between the displacement values of different parts. The maximum displacement at the middle point of the long side was 13 mm, and that of the corner was only 5 mm. The vertical displacement of the surrounding buildings increased with the progress of the project, and the displacement value near the corner of the foundation pit was relatively small. The closer the surrounding pipelines were to the middle point of the foundation pit, the larger the displacement value was, and the displacement value also increased with the progress of the project. The results of this study show that the deformation of a deep foundation pit accords with the time–space effect, which provides some references for the deformation analysis of deep foundation pit engineering.