Studying the behaviour of deep excavation adjacent to old buildings using plaxis 3d

Abstract EN

Due to space limitations in urban areas, a challenging trend to go deeper into the ground, and increase the space required for providing basements, car parking and for utilities etc.

Major concern for projects involving deep excavation is the impact of construction related ground movements on nearby structures.

This paper studying a case history in Chicago Avenue and State Street Subway Renovation Project in Chicago.

A monitoring system was performed during excavation in all the surrounding buildings for the excavation using deformation gauges and settlement points.

In this paper, 3D Finite element model is developed using PLAXIS-3D to represent the effect of excavation stages on the wall deformation and settlement below adjacent structure.

The analysis is carried out considering non-linear behavior of soil using Hardening soil Model.

Results of the models are compared with the real field investigations.

In general, better lateral wall movement and ground surface settlement are obtained from the model.

Computer simulation technique was an effective method to analyze the influence of pit excavation on the adjacent structures.