Behavior of Strut- Deep Excavation in Sandy Ground Considering Adjacent Structures
Volume Title: ICASGE2025
Paper ID : 1113-ICASGE-FULL
Authors
Civil Eng. Dept, Faculty of Engineering Al-Azhar University
Abstract
ABSTRACT
Deep excavations are required as cities expand due to the increased demand for housing and transportation infrastructures. Supporting deep excavations is necessary to prevent damage to nearby structures, guarantee their safety, and reduce deformations. The braced excavation method is the most popular approach, but it depends on a number of variables, including the construction budget and timeline, the presence of nearby buildings, the availability of construction equipment, and the size of the construction site. In case of existing buildings around the excavation with varying heights, the asymmetric loading should be taken into consideration.
The present study aims to evaluate the change in strut loads, deformations, and bending moments of the retaining walls, ground surface settlements, and heave in the strut-supported deep excavations under asymmetric surcharge loads. Based on verified case study, PLAXIS 2D – program was used to model strut-supported deep excavation systems in sandy soil with different relative densities. Optimization of strut position was also investigated. It has been demonstrated that, because the retaining walls on the left and right sides may behave differently, the strut-supported excavation systems should be designed as a whole rather than separately.
Deep excavations are required as cities expand due to the increased demand for housing and transportation infrastructures. Supporting deep excavations is necessary to prevent damage to nearby structures, guarantee their safety, and reduce deformations. The braced excavation method is the most popular approach, but it depends on a number of variables, including the construction budget and timeline, the presence of nearby buildings, the availability of construction equipment, and the size of the construction site. In case of existing buildings around the excavation with varying heights, the asymmetric loading should be taken into consideration.
The present study aims to evaluate the change in strut loads, deformations, and bending moments of the retaining walls, ground surface settlements, and heave in the strut-supported deep excavations under asymmetric surcharge loads. Based on verified case study, PLAXIS 2D – program was used to model strut-supported deep excavation systems in sandy soil with different relative densities. Optimization of strut position was also investigated. It has been demonstrated that, because the retaining walls on the left and right sides may behave differently, the strut-supported excavation systems should be designed as a whole rather than separately.
Keywords
Keywords: Plaxis 2-D; Numerical Models. Strut-supported system; Deep excavation geometry; Sandy ground; surcharge load
Subjects