Analysis of Wall and Ground Movements Due to Deep Excavations in Soft Soil Based on a New Worldwide Database

Moormann, Christian

doi:10.3208/sandf.44.87

Cited by 214 publications

(72 citation statements)

References 10 publications

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“…The performances of deep excavations has been studied by many researchers and engineers around the world (Ou et al, 1993;Ng, 1998;Long, 2001;Moormann, 2004;Wang et al, 2005;Kung et al, 2007;Liu et al, 2011a;Ng et al, 2012). A number of databases have been developed to estimate excavation-induced maximum lateral wall deflection and ground surface settlements behind retaining walls.…”

Section: Introductionmentioning

confidence: 99%

Interaction between a large-scale triangular excavation and adjacent structures in Shanghai soft clay

Shi

Liu

Huang

et al. 2015

Tunnelling and Underground Space Technology

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Section: Introductionmentioning

confidence: 99%

Interaction between a large-scale triangular excavation and adjacent structures in Shanghai soft clay

Shi

Liu

Huang

et al. 2015

Tunnelling and Underground Space Technology

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“…Moormann (2004) collected data from worldwide experiences and defined soft soil as the undrained shear strengths (S u ) less than 75~100kPa. Wong (1997) referred soft soil to its SPT N value ranging from 0 to 5.…”

Section: Concerning Details Of Deep Excavations In Tianjinmentioning

confidence: 99%

“…Li (2013) analyzed the embedded depth ratio is about 0.3 and the depth of maximum lateral wall deflection is about (0.58H±5m) of deep excavations in Beijing. Moormann (2004) analyzed database worldwide. He summed up that the embedded depth ratio varies between 0.1 and 2.0 with an average value of 0.92 and the average H δhm is about 1.0H.…”

Section: Analysis Of Depth Of Maximum Wall Deflectionmentioning

confidence: 99%

Wall and Ground Movements due to Deep Excavation of Tianjin Subway Station

Liu¹,

Zhang²,

Fang³

et al. 2017

dtmse

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This paper analyzes wall deflection and ground surface settlement due to deep excavation. 21 case histories of Tianjin subway line 6 are collected and analyzed. And the results are compared with previous field studies worldwide. The mean value of maximum wall deflection δ hm is 0.11%H, in which H is the excavation depth. The upper limit of δ hm is 0.44%H when H is less than 8m and 35mm when H is more than 8m. When excavation finished, δ hm ranges from 0.02%H to 0.24%H with an average value of 0.12%H. The depth of maximum wall deflections H δhm is within 0.75H±8m and the average H δhm is 0.69H when excavation finished. It's greatly affected by the embedded depth ratio. H δhm can be predicted by exponential function more accurately. The distribution of δ vm generally extends to a distance of 2H from the diaphragm wall. The bound of stiff clay line proposed by Clough and O'Rourke (1990) and bilinear curve proposed by Erin H. Y. Leung (2007) can be used as the upper bound for ground surface settlement for excavation of Tianjin subway line 6. The ratio between δ vm and δ hm generally ranges from 0.34 to 2.66, with an average value of 1.13. It's consistent with the average value of 1.21 collected from literature in similar soil conditions. This paper is a reference for design and construction of Tianjin's deep excavation of subway station.

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“…Clough et al [2] showed the pattern of settlements next to excavation is influenced by soil type. Moormann [3] carried out extensive empirical studies by taking 530 case histories of retaining wall and ground movement due to excavation in soft soil (cu<75 kPa). The variation of normalized maximum horizontal displacements [4] with system stiffness are compared with [3] in the previous studies [5] the effect of excavation geometry; wall stiffness and embedment depth.…”

Section: Introductionmentioning

confidence: 99%

“…Moormann [3] carried out extensive empirical studies by taking 530 case histories of retaining wall and ground movement due to excavation in soft soil (cu<75 kPa). The variation of normalized maximum horizontal displacements [4] with system stiffness are compared with [3] in the previous studies [5] the effect of excavation geometry; wall stiffness and embedment depth. The use of non-linear elastro plastic model have been used to incorporate the small strain behavior involved in deep excavation [6].…”

Section: Introductionmentioning

confidence: 99%

Parametric Study on Analysis and Design of Permanently Anchored Secant Pile Wall for Earth Quake Loading

Emmanuel¹

2017

J Archit Eng Tech

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Journal of Architectural Engineering Technology AbstractDue to space limitations in urban areas, deep excavation in to the ground has become a common practice worldwide. Deep excavations are supported by conventional retaining walls: sheet pile walls, braced walls, diaphragm walls and secant pile walls. An advantage of secant pile wall compared with other excavation supporting systems is that they are the most economical methods of creating an effective water control barriers for building structural walls. The analysis of these deep excavations requires considerations of; nonlinear, dynamic and involves consideration of soil parameters, deformation, interaction of soil and retaining configuration. Thus, in order to accurately describe the behaviour of the anchored secant pile for earthquake loading, 3D finite element simulation was applied. The study considering earth pressure, plastic analysis, and soil deformation was carried out. The analysis indicated that for 20 m excavation step in fourth stage, incremental lateral displacement was 55.2 mm and total displacement was 110.4 mm. The analysis indicated that the deeper the foundation, the larger the deformation. The real accelerogram of Loma Prieta earthquake at Del Valle Dam Station with moment magnitude 7.1 occurring at epicentral distance 66 (18 Oct, 1989) was used in the study. In order to accurately study the response of the anchored secant pile to earthquake loading; it is suggested to carry out the relevant tests to determine the right stiffness parameters. Further investigation on parameters (density and shear modulus) and other conditions that affect seismic analysis.

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Analysis of Wall and Ground Movements Due to Deep Excavations in Soft Soil Based on a New Worldwide Database

Cited by 214 publications

References 10 publications

Interaction between a large-scale triangular excavation and adjacent structures in Shanghai soft clay

Interaction between a large-scale triangular excavation and adjacent structures in Shanghai soft clay

Wall and Ground Movements due to Deep Excavation of Tianjin Subway Station

Parametric Study on Analysis and Design of Permanently Anchored Secant Pile Wall for Earth Quake Loading

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