Comparative investigation on deformation monitoring and numerical simulation of the deepest excavation in Beijing

Wang, Shuaidong; Li, Qimin; Dong, Jingmin; Jian, Wang; Wang, Mingzhu

doi:10.1007/s10064-020-02019-y

Cited by 22 publications

(10 citation statements)

References 18 publications

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“…Airport pit project is different from ordinary pit project, which has the characteristics of wide distribution of pit range, more excavation depth, more complex geological distribution. At present, most scholars at home and abroad focus on the research of foundation pit engineering mainly in the dense urban building areas [1][2][3][4][5][6][7][8][9][10], and less research on the large-scale foundation pit engineering of airports. This paper takes the background of a large-scale foundation pit expansion project of an airport in Northwest China as the background, briefly introduces the support method adopted in this foundation pit project, and analyzes the monitoring data of the foundation pit to verify the reasonableness of the support method, which meets the requirements of design and environment.…”

Section: Introductionmentioning

confidence: 99%

Analysis of deformation law of an airport foundation pit monitoring in loess area

Guo,

Wei,

2024

AETR

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This paper takes an airport foundation pit project in northwest loess area as the research object, and introduces the key method technology of support, construction and monitoring of this foundation pit project. The scope of this foundation pit project is widely distributed, there are no buildings in the surrounding area, and there is less restriction on the construction space, so the GRF01 green assembled support method of Slope release with soil nail wall is adopted, which controls the deformation of the foundation pit well and at the same time, plays the role of green environmental protection and reduces the cost. The analysis of the pit monitoring data shows that the pit engineering support design scheme effectively controls the deformation of the pit, and all monitoring data did not reach the alarm value, which ensures the safety of pit excavation and in-pit operation, and achieves the dual goals of economy and environmental protection. It can provide reference for the design and construction of similar large-scale foundation pit excavation and support in loess area.

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Section: Introductionmentioning

confidence: 99%

Analysis of deformation law of an airport foundation pit monitoring in loess area

Guo,

Wei,

2024

AETR

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“…Wang et al [7] studied the stress and deformation characteristics of composite soil nailing wall and anchored soldier pile wall combined retaining system during excavating 31.4 m deep. They analyzed the construction process of foundation excavation using simulation software and monitoring data.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of an anchored retaining wall system in a deep foundation excavation: A case study of Sivas Cultural Center Building in Türkiye

Acar

KEKÜL

2023

Turkish Journal of Engineering

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Modeling the surface element and support system in deep excavation pits and investigating the deformation mechanism is an important issue. In this study, alternative solution methods for an anchored bored pile model are compared and discussed, and it is aimed to contribute to the studies to be carried out in the deep excavation area. A numerical analysis of retaining wall design is analyzed in the case of the Sivas cultural center building's deep excavation using GGU-Retain and Plaxis 2D software. Measured field data and simulated results are discussed. As a result, the bending moment and lateral deformation reach a maximum when the foundation pit is excavated to the bottom. It can be said that the lateral deformation value found with Plaxis 2D is within the allowable limits, closer to the field data, and provides sufficient quality. The research results will provide theoretical and practical experience for the optimal design and construction of similar deep excavation pits.

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“…For example, foundation pits in soft soil require a maximum lateral deformation of less than 0.18% of the excavation depth. Furthermore, the distances between pits and nearby sensitive buildings or structures have decreased due to the reduction in available urban spaces (Hwang and Moh, 2007;Ding et al, 2018;Beyzaei et al, 2019;Xiao et al, 2019;Wang et al, 2020). Due to the pre-stress loss in ordinary steel struts, it is difficult to control the deformation of pits with adjacent sensitive buildings or structures in soft soil areas if the retaining structures are supported by ordinary steel and concrete struts (Finno et al, 2007;Ma et al, 2008;Wang et al, 2010Wang et al, , 2012Li, 2021).…”

Section: Introductionmentioning

confidence: 99%

A hybrid method to determine optimal design axial forces of servo steel struts in excavations with high deformation requirements

Jin

Zhou

et al. 2023

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PurposeThe application of servo steel struts enables the active control of the excavation-induced deformation in foundation pits. However, there is currently only one design axial force for each servo steel strut, which requires in-situ axial force adjustments based on the experience of site engineers. The purpose of this study is to develop a method for determining the design axial forces of servo steel struts at different excavation steps.Design/methodology/approachIn this study, a hybrid method for determining the design axial forces of servo steel struts in different excavation steps was established based on the combination of the elastic foundation beam model and nonlinear optimisation.FindingsThe hybrid method is capable of providing a better set of design axial forces than the original design method. The lateral wall displacement and bending moment could be better controlled. Ordinary steel struts should be prevented from being set between servo steel struts to avoid axial force losses.Practical implicationsThe axial forces of the servo steel struts at different excavation steps should be designed to achieve better deformation control effects. Moreover, a well-designed set of axial forces can also reduce the internal forces of the retaining structure.Originality/valueThe hybrid method enables the determination of the design axial forces of servo steel struts at different excavation steps, which can guide axial force adjustments in practical projects.

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Comparative investigation on deformation monitoring and numerical simulation of the deepest excavation in Beijing

Cited by 22 publications

References 18 publications

Analysis of deformation law of an airport foundation pit monitoring in loess area

Analysis of deformation law of an airport foundation pit monitoring in loess area

Comparative analysis of an anchored retaining wall system in a deep foundation excavation: A case study of Sivas Cultural Center Building in Türkiye

A hybrid method to determine optimal design axial forces of servo steel struts in excavations with high deformation requirements

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