Behavior of a Deep Excavation and Damages on Adjacent Buildings: a Case Study in Vietnam
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Behavior of a Deep Excavation and Damages on Adjacent Buildings: a Case Study in Vietnam Quoc Thien Huynh 1 & Van Qui Lai 2,3 Suraparb Keawsawasvong 5
& Tirawat
Boonyatee 4
&
Accepted: 29 October 2020/ # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper investigates the behavior of deep excavations and damages on adjacent buildings based on an excavation in a thick sand layer in Vietnam. Firstly, measured horizontal displacements of diaphragm walls were used to calibrate soil stiffness parameters for finite element analysis (FEA). Then, the behavior of diaphragm walls, groundwater, ground surface deformation, and an adjacent building was analyzed. The analysis results and damages observed in the field were used to review the validity of the criteria for evaluating the damage potential of excavation to adjacent buildings. It can be concluded from the study that the damage potential of adjacent buildings as evaluated from FEA through the strain state chart proposed by Boscardin and Cording (1989) or the damage potential index (DPI) proposed by Schuster et al. (2009) is fairly accurate with field observations. Keywords Deep excavation . Damage potential criteria . Thick sand layer
1 Introduction Construction of deep basements in narrow spaces is inevitable in urbanized areas. The design and construction of deep excavations under such situations require great attention to ensure stability and to minimize the impact on adjacent buildings. During the
* Van Qui Lai [email protected] Quoc Thien Huynh [email protected] Tirawat Boonyatee [email protected] Suraparb Keawsawasvong [email protected] Extended author information available on the last page of the article
Transportation Infrastructure Geotechnology
initial design and preparation stage, it is convenient to assess the damage potential of adjacent buildings by some simple rules. For this purpose, the damage potentials may be evaluated from the angular distortion β and the tensile strain εL (Skempton and MacDonald 1956; Burland et al. 1978; Boscardin and Cording 1989; Son and Cording 2005). Schuster et al. (2009) performed a regression analysis on collected field observations and proposed simple equations for predicting the β and εL values. Sabzi and Fakher (2015) applied the criteria proposed by Schuster et al. (2009) to a shallow excavation next to a low-rise building with inclined struts. Halim and Wong (2011) discussed the damage assessments of adjacent buildings by considering the influence zone of excavations and current structural conditions from visual inspection surveys. In general, these studies considered the performance of retaining wall, ground surface, and an adjacent building in separate models or only used measured field data to assess damage levels of adjacent buildings. Lin et al. (2016) assumed a simple artificial case study to estimate the damage potential of an adjacent building by employing finite element analysis (FEA). The objective of this study is to investigate behaviors of deep
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