Research on the Characteristics of Stress and Deformation of Foundation Pits During the Construction Process of Building Engineering
The surface settlement,internal force and deformation of the supporting structure are monitored and analyzed during the excavation of the foundation pit of a building.The results show that the variation trend of the axial force of the anchor cable is mainly divided into three processes:the decrease of the axial force,the slow increase of the axial force and the stabilization of the axial force.In the excavation process of the foundation pit,the settlement gradually increases from the side wall of the foundation pit to about 5 m in the foundation pit,and reaches the maximum value at 5 m.Once the distance from the side wall of the foundation pit exceeds 5 m,with the increase of distance,the settle-ment begins to decrease rapidly,and decreases to zero when it is 15 m away from the excavation face,and when the excavation depth of the foundation pit is-3 m,the active earth pressure acting on the supporting pile is relatively low,and the deformation of the supporting pile is al-most zero.With the increase of excavation depth,the maximum displacement of the supporting structure gradually appears in the upper area of the foundation pit,and the peak displacement of the supporting pile occurs at about 0.5 times the depth of the foundation pit,rather than the top position of the pile.
High-rise buildingsExcavation engineeringDeformation under stressSupporting structure
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