A comprehensive evaluation of strength and modulus parameters of a gravelly cobble deposit for deep excavation analysis

Khoiri, Mohamad; Ou, Chang‐Yu; Teng, Fuchen

doi:10.1016/j.enggeo.2014.03.008

Cited by 13 publications

(7 citation statements)

References 12 publications

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“…Meanwhile, the HS model implements three Young's moduli as the stiffness parameters for the soils, which include the secant Young's modulus Young's modulus is sensitive and important for estimating the deformation of an excavation but is difficult to estimate reasonably. Due to this, a series of back analyses was performed [35], and the [38]). For the MC model, the / 50 ratio was selected to be equal to 3 for each soil sublayer via back analysis.…”

Section: Selection Of Parametersmentioning

confidence: 99%

Design Analysis and Observed Performance of a Tieback Anchored Pile Wall in Sand

Han

Zhao

Chen

et al. 2017

Mathematical Problems in Engineering

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This paper aims to study the design process and service performance of a deep excavation supported by tieback anchored pile walls. The design procedure and design approaches for deep excavation in China are described. Based on the excavation case history for Shenyang, China, design results obtained using the elastic method and the finite element method (FEM) are compared and analyzed. Special emphasis is given to the analysis of horizontal wall deformations, internal forces in the wall, earth pressures on the wall, ground surface settlements, and stabilities of the excavation. The similarities and differences between the Chinese code (JGJ 120-2012) and the European code (EN 1997-1) for the design of geotechnical structures are presented based on a design example. Through the comparison, it is indicated that the Chinese code focuses on the design result, while the European code focuses on the design process. The crucial construction methods for reducing construction risk based on the excavation case history are described. The mechanical behaviors of the excavation retained by an anchored pile wall were investigated by analyzing observed field cases. The results provide good, practical guidelines for the design and construction of a tieback anchored pile wall retained excavation in sandy soil.

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Section: Selection Of Parametersmentioning

confidence: 99%

Design Analysis and Observed Performance of a Tieback Anchored Pile Wall in Sand

Han

Zhao

Chen

et al. 2017

Mathematical Problems in Engineering

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“…Du et al (2019) presented a multi-scale analysis method for simulating tunnel excavation in sandy cobble strata, and reduced the numerical effort with the precision guaranteed. Khoiri et al (2014) analysed the strength and modulus parameters of the pebble layer by numerical back, and found that the strength parameter tends to decrease linearly. Edalat et al (2010) analysed the process of choosing TBM for Tabriz urban railway line 2(TURL2) using the MCA method (Multi-Criteria Analysis).…”

Section: Adjacent Metro Project Sandy Cobble Stratum Computed Tomography Orthogonal Experiments Numerical Calculationmentioning

confidence: 99%

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

et al. 2021

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“…31 The HS model implements 11 parameters, including strength parameters, stiffness parameters, and advanced parameters, which were obtained from triaxial and consolidation tests. 32,33 The moduli at the in situ stress state are automatically calculated as a function of those at the reference stress state (e.g. equation 1)…”

Section: Numerical Modelmentioning

confidence: 99%

“…The stiffness parameters in the HS model consist of three stress-dependent stiffness parameters, E ref 50 , E ref oed , and E ref ur , defined as the secant, oedometer, and unloadingreloading stiffness moduli at the reference pressure p ref , respectively. 32,33 The moduli at the in situ stress state are automatically calculated as a function of those at the reference stress state (e.g. equation ( 1))…”

Section: Numerical Modelmentioning

confidence: 99%

A numerical study on the influence of anchorage failure for a deep excavation retained by anchored pile walls

Zhao

Han

Yang

et al. 2018

Advances in Mechanical Engineering

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This article aims to study the mechanical behavior of a deep excavation occurring in sandy soils retained by anchored pile walls under anchorage failure conditions. The primary causes and types of anchorage failures are summarized. Based on an excavation case history, a numerical investigation is conducted using a PLAXIS-based finite element method to reveal the crucial mechanical behaviors of the retaining structure and soil layers as a result of different types of anchorage failures. According to the simulation results, the responses to anchorage failures are analyzed, and the safety coefficient for the retaining structure is presented. The analysis for this numerical work indicates that dangerous failure positions appear at the top of the pile wall or in the region near the excavation bottom. Then, a three-dimensional numerical model is established to analyze the mechanical behaviors and the influence scopes of the retaining structure caused by individual anchor failures. Special emphasis is placed on the analysis of the bending moments and horizontal displacements in the wall, as well as on the prestress and internal forces in each of the row anchors, displacements, and plastic strains in the ground and stabilities of the deep excavation. Conclusions obtained from the numerical study can provide guidelines for good practices in the construction of anchored pile wall-retained excavations in sandy soil.

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A comprehensive evaluation of strength and modulus parameters of a gravelly cobble deposit for deep excavation analysis

Cited by 13 publications

References 12 publications

Design Analysis and Observed Performance of a Tieback Anchored Pile Wall in Sand

Design Analysis and Observed Performance of a Tieback Anchored Pile Wall in Sand

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

A numerical study on the influence of anchorage failure for a deep excavation retained by anchored pile walls

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