Experimental Study on Stability Analysis of a Structure during Excavation beneath This Structure

Abstract

In order to create more underground space, it was important to investigate the impact of excavation on the preexisting building. In this paper, a scale model test was conducted to analyze the stability of the structure during excavation. The model consisted of underpinning piles preinstalled in clay, with a reinforced concrete building placed on underpinning piles. The strain and settlement of the structure were observed to reveal the time settlement of columns and the time strain of beams, columns, and piles during excavation. The results showed that the strain change of beams was small, and strain values of columns were getting higher. And underpinning piles had great strain variations. They were of great significance to underpinning design and engineering practice.

Numerical Simulation of Soil Displacement and Settlement in Deep Foundation Pit Excavations Near Water

“…This may explain a certain degree of negative displacement. At the positions of the second and fourth transverse braces, the horizontal displacement of the diaphragm wall again showed a small negative mutation, which indicates that the transverse braces controlled the horizontal displacement of the diaphragm wall [31]. The vertical displacement variation curves of settlement monitoring points at different distances from the diaphragm wall show that the response time of soil vertical displacement was related to the distance from the excavation surface of the foundation pit.…”