Interaction Analysis between Existing Loaded Piles and Braced Excavation Design Parameters

Shaaban, Mohamed; Abdel-Naiem, Mostafa; A. A. Senoon, Abdel-Aziz; A. Kenawi, Mamdouh

doi:10.21608/jesaun.2023.187262.1199

Interaction Analysis between Existing Loaded Piles and Braced Excavation Design Parameters

Document Type : Research Paper

Authors

¹ Assist. lecturer, Dept. of Civil. Eng., Faculty of Engineering, Sohag University, Sohag, Egypt

² Professor, Civil Engineering Dept., Faculty of Engineering, Assiut University, Assiut, Egypt.

³ Assoc. professor, Dept. of Civil. Eng., Sohag University, Sohag, Egypt

10.21608/jesaun.2023.187262.1199

Abstract

Three-dimensional numerical analyses are conducted using the finite element software PLAXIS 3D to gain insight into the interaction behavior between deep excavation and adjacent piled foundations in fully saturated sand. Effects of excavation width and depth, the distance between strut level and the excavation surface with each excavation stage, strut stiffness, diaphragm wall stiffness, and diaphragm wall depth are examined during the adjacent excavation. In practice, incorrect values of the braced excavation design parameters may result in an uneconomical or even unsafe design. The analyses revealed that increasing the excavation width or depth has a significant influence on the adjacent pile group behavior. Additionally, it is also observed that reducing the distance between the strut level and the excavation surface with each excavation stage, increasing the struts stiffness, increasing diaphragm wall thickness or depth, and reducing the horizontal or vertical span of struts can assist to reduce settlement and tilting of the pile group induced by the adjacent excavation.

Keywords

Main Subjects

Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.

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