Observed Behaviors of a Long and Deep Excavation Constructed by Cut-and-Cover Technique in Shanghai Soft Clay

Tan, Yong; Wei, Bin

doi:10.1061/(asce)gt.1943-5606.0000553

Cited by 202 publications

(47 citation statements)

References 33 publications

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“…Since the publication of Peck [7], lots of researchers have devoted themselves to the analysis of field measurements 2 Mathematical Problems in Engineering to reveal the performances of excavations and retaining structures (e.g., O'Rourke, 1981 [8]; Finno et al, 1989 [9]; Ou et al, 1998 [10]; Finno et al, 2007 [11]; and Tan and Wei, 2011 [12]). With the increasing employment of tieback anchored retaining walls, the analysis of the mechanical behavior for an excavation supported by tieback walls is also prevalent in the available literature.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…2 were derived by top-down computations based on the deflection at the wall top, which was measured by fully-automatic total station [20]. The diaphragm wall developed deflections of 0-1 mm in the inclinometer toe (19 m BGS).…”

Section: Field Measurements Of the Wall Deflectionsmentioning

confidence: 99%

Test and numerical research on wall deflections induced by pre-excavation dewatering

Zheng

Zeng

Diao

et al. 2014

Computers and Geotechnics

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“…With the rapid economic development of Shanghai, many underground facilities, such as metro tunnels and deep excavations, are constructed in the soft deposits of Shanghai (Shen et al 2006(Shen et al , 2014Xu et al 2012b). In order to improve safety during underground construction, Portland cement is often used as an additive in many ground improvement techniques, such as deep mixing (Han et al 2007;Shen et al 2003Shen et al , 2008Chen et al 2013;Horpibulsuk et al 2011;Sukmak et al 2013) and jet grouting (Tan and Wei 2012;Tan and Wang 2013a, b;Shen et al 2013a, b, c;Wang et al 2013).…”

Section: Introductionmentioning

confidence: 97%

Rapid field evaluation of the strength of cement-stabilized clayey soil

Wang

Yin

2014

Bull Eng Geol Environ

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This paper presents an investigation into the hardness and unconfined compressive strength (UCS) of cement-stabilized Shanghai clay. Various specimens with different cement content and curing time were made in order to conduct hardness tests and unconfined compression tests. The Shore-A durometer was used in a pioneer manner to measure the hardness of stabilized clay. Hardness tests suggest that the measured values of degree of hardness ranged from 1 to 87 DH, and the unconfined compression tests showed that the measured UCS varied from 56 to 1,061 kPa. Test results indicate that the average degree of hardness decreases dramatically with an increase in the clay-water/ cement ratio. It is shown that the relationship between the degree of hardness and the curing time is approximately linear in the semi-logarithmic plot. An exponential equation is proposed to express the unique relationship between the UCS (q u ) and the ratio of degree of hardness (S/S r ) by regression analysis. The expected prediction range of UCS using the Shore-A durometer was calculated to be between 0.04 and 1.79 MPa. The exponential equation proposed in this study may be used to produce a quick prediction of UCS by measuring the hardness of samples in the field.

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Observed Behaviors of a Long and Deep Excavation Constructed by Cut-and-Cover Technique in Shanghai Soft Clay

Cited by 202 publications

References 33 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

Test and numerical research on wall deflections induced by pre-excavation dewatering

Rapid field evaluation of the strength of cement-stabilized clayey soil

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