Technical gazette, Vol. 27 No. 5, 2020.
Original scientific paper
https://doi.org/10.17559/TV-20190814102334
Semi-Empirical Method for Estimating Stiffness and Deformation of Cylindrical Retaining Diaphragm Wall
Jiequn Zhai*
; Tongji Architectural Design (Group) Co. Ltd., Shanghai, China
Jian Jia
; Tongji Architectural Design (Group) Co. Ltd., Shanghai, China
Xiaolin Xie
; Tongji Architectural Design (Group) Co. Ltd., Shanghai, China
Abstract
This study presents a semi-empirical method to estimate stiffness and deformation of cylindrical retaining diaphragm wall. Based on the concept of "arch-beam" method, the retaining structure is separated into two structural components: arch unit and supported beam unit. The stiffness of both units is computed by parameter analytical method and then combined to obtain the total retaining stiffness of cylindrical diaphragm wall. The proposed model incorporates major factors considered in design of cylindrical retaining structure such as soil condition, geometry of excavation, geometries and materials of diaphragm wall, spacing and stiffness of ring beam, joints in diaphragm wall. A statistical equation is developed to relate the stiffness and lateral wall deformation. The proposed stiffness and deformation model is validated by 24 cylindrical excavation cases in literature.
Keywords
cylindrical retaining structure; diaphragm wall; parameter analytical method; stiffness
Hrčak ID:
244770
URI
Publication date:
17.10.2020.
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