Design adaptations in a large and deep urban excavation: Case study

Alipour, Amir; Eslami, Abolfazl

doi:10.1016/j.jrmge.2018.08.014

Cited by 22 publications

(11 citation statements)

References 24 publications

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“…In addition, Mohamed et al also briefly remarked on the prediction of excavation behavior by means of 2D compared with 3D numerical analysis results. Rich data and achievements have also been provided by experimental studies [9,10], and field measurement analyses of excavation cases [11][12][13][14][15][16][17][18][19][20] also enable the further development of foundation pit excavation research.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Deformation and Stress Characteristics of a Multibraced Pit‐in‐Pit Excavation in a Subway Transfer Station

Shi

Rong

Cheng

et al. 2020

Advances in Civil Engineering

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As an important part of subway transfer station construction, pit-in-pit (PIP) excavation has always been a key object of monitoring and control. In this study, taking the PIP excavation project of Hefei metro line 4 and line 7 transfer station as the background, combined with on-site monitoring and numerical simulation, the variation law of lateral wall displacement, ground surface settlement, and strut force during the PIP excavation were analyzed. The results showed that the maximum lateral deformation of the pile caused by the excavation of the external pit accounted for 80%–90% of the total deformation and the surface settlement accounted for 70% of the total settlement. The excavation of the inner pit only made the maximum lateral wall displacement of the outer pit and the surface settlement behind the wall increase slightly, the growth rate tended to zero, and the maximum lateral deformation depth was all above the excavation surface, which indicated that, for this project, the inner excavation had little effect on the outer pit retaining structure. In addition, the increased exposure time of the soil at the bottom of the pit and the presence of the corner effect will cause the further development of the structure displacement and the surface settlement. Based on strut force measurements, using the tributary area load distribution procedure, it was obtained that 0.3γHe was used as the upper limit index of strut force in the region, where γ is the weight of the soil and He is the excavation depth of the foundation pit. The research conclusions were helpful for the construction and sustainable development of the PIP project.

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Section: Introductionmentioning

confidence: 99%

Analysis on Deformation and Stress Characteristics of a Multibraced Pit‐in‐Pit Excavation in a Subway Transfer Station

Shi

Rong

Cheng

et al. 2020

Advances in Civil Engineering

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“…In the current regulatory documents, much attention is paid to assessing the impact of new construction on the surrounding development, which is also reflected in articles by various authors [1][2][3][4]. This task can be accomplished in two ways: by means of analytical and numerical calculations.…”

Section: Introductionmentioning

confidence: 99%

Initial data for Hardening Soil model

Konyushkov

Penkov²,

Fedorenko³

2023

E3S Web Conf.

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Nowadays, civil engineering makes high demands on numeral modelling in geotechnical engineering, notably, to ensure reliability of a structure at minimum cost. Using of codes and standards supported with numerical calculations and soil constitutive models makes the design satisfying this requirement possible. But no matter how complex the model is its fidelity depends on input data. The article describes a method for determining the main characteristics of the Hardening Soil model (including calculating the power parameter m and reducing the deformation characteristics of the soil to the recommended value of the reference pressure). A comparison of two approaches was made: using a table of physical and mechanical characteristics; and the approach based on the analysis of the results of laboratory tests in accordance with the methodology given in the article and further verification of the obtained parameters. The result of the comparison was the complete inconsistency of the first approach for assigning the parameters of the nonlinear soil model and the need to refer to the test protocols was confirmed.

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“…A couple of retaining methods can be selected for a building's foundation or for other excavation works on concrete structures [1][2][3][4][5][6][7]. The most popular methods are diaphragm walls, steel sheet piles, pre-stressed anchors, PC piles, and steel H-shapes/rails combining the wooden boards.…”

Section: Introductionmentioning

confidence: 99%

Using a Unique Retaining Method for Building Foundation Excavation: A Case Study on Sustainable Construction Methods and Circular Economy

Liu¹,

Tserng

et al. 2022

Buildings

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The selection of a retaining method during the excavation of building foundations is always of paramount concern to engineers. In general, the application and use of steel H-shapes are typically practiced by designers to form the entire retaining system; however, sustainability issues, including carbon emission reduction, environment protection, material consumption, and resource circulation, are being increasingly considered when developing a new project. The Linkou Public Housing Project (LPHP), located in New Taipei City, Taiwan, is introduced in this paper to present a sustainable soil-retaining method that also exhibits the principles of a circular economy. The triangular shape of the foundation zone of the LPHP led to difficulty in setting the horizontal strut H-beam system. In this project, the “Anchor Pile with Steel Cable System (APSCS)” was adopted to retain the 11.5 m depth excavation for the LPHP foundation construction. The prime contents of the soil in the Linkou district comprises a laterite–gravel layer mixed with brown silty and sandy clay, with a groundwater level (G.L.) of −25 m. By adopting the sustainable APSCS method, the excavation of the LPHP foundation was safely completed. Approximately NT $350 million in direct and indirect costs of construction was saved, and the duration of the work was reduced by up to 90 days. Furthermore, the carbon emissions were reduced by 677.6 tons due to the diminished use of the steel H-shaped materials. The authors concluded that the use of the APSCS method in the LPHP was successful and it was a valuable reference for other similar projects. Moreover, the authors presented another retaining-system failure case, which was located near the LPHP site, to compare the success of the LPHP.

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Design adaptations in a large and deep urban excavation: Case study

Cited by 22 publications

References 24 publications

Analysis on Deformation and Stress Characteristics of a Multibraced Pit‐in‐Pit Excavation in a Subway Transfer Station

Analysis on Deformation and Stress Characteristics of a Multibraced Pit‐in‐Pit Excavation in a Subway Transfer Station

Initial data for Hardening Soil model

Using a Unique Retaining Method for Building Foundation Excavation: A Case Study on Sustainable Construction Methods and Circular Economy

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