Earth pressure on anchor–shotcrete retaining structures

Gao, Juncheng; Jia, Jinqing; Yang, Hewei; Zhu, Weiqing

doi:10.1680/jgeen.16.00042

Proceedings of the Institution of Civil Engineers - Geotechnica

2017

DOI: 10.1680/jgeen.16.00042

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Earth pressure on anchor–shotcrete retaining structures

Juncheng Gao

Jinqing Jia

Hewei Yang

et al.

Abstract: An analytical solution is proposed for limiting earth pressure on pre-stressed anchor–shotcrete retaining structures. The solution is in accordance with pre-stress diffusion model assumption, wedge theory and Mohr–Coulomb theory. Centrifuge tests were performed to investigate the feasibility of the analytical solution for the earth pressure on pre-stressed anchor–shotcrete retaining structures, and these were further verified by centrifuge tests from other published works. It was found that the results of both… Show more

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“…In Gao et al (2017), an analytical solution is proposed for limiting earth pressure on prestressed anchor-shotcrete retaining structures. The authors' work included centrifuge testing to investigate the feasibility of the proposed analytical solution, and a verification using centrifuge testing reported by others.…”

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Allenou

2017

Proceedings of the Institution of Civil Engineers - Geotechnica

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On behalf the Editorial Board, I welcome you to the October issue of Geotechnical Engineering. In this issue, you will find six quite diverse but very interesting papers, followed by four Discussions. Do bear in mind that if you wish quicker access to new content, the journal publishes its most recent articles Ahead of Print on its Virtual Library homepage.The first two papers assess certain geotechnical properties of two soils. Firstly, Georgiannou et al. (2017) present the findings of their investigations into the geotechnical properties of a natural crushed and ground zeolite used as a compacted soil liner in geoenvironmental applications. Testing undertaken suggested that the material behaved as a granular material. Additional testing was performed on samples of quartz sands of similar mean diameter and varying gradations and grain shape, which showed comparable results for zeolite and sand of similar gradation and grain shape. For a possible use of the zeolite as an engineering fill material, particle crushing was not observed to be significant for stress levels typical of common earthworks construction, and increasing the moisture content of the material had no noticeable impact on its shear strength.Al-Mahbashi and Elkady (2017) then report on their work to predict the unsaturated shear strength of two locally expansive clays available in Saudi Arabia over a wide suction range. Semi-empirical or micromechanical prediction models were considered, with soil water characteristic curves and effective shear strength parameters as inputs. Predicted unsaturated shear strength functions were compared with experimental data obtained from unconfined compression strength testing on samples with varying moisture content. The comparison showed significant discrepancy, particularly at elevated suction values, which was attributed to desiccation cracks appearing during drying.The next two papers describe experimental work undertaken to model geotechnical structures. In Gao et al. (2017), an analytical solution is proposed for limiting earth pressure on prestressed anchor-shotcrete retaining structures. The authors' work included centrifuge testing to investigate the feasibility of the proposed analytical solution, and a verification using centrifuge testing reported by others. Test results indicated satisfactory agreement with the analytical solution and suggested that pre-stress has little influence on the pre-stress angle of diffusion.Dynamic analysis work for an offshore wind turbine supported on a monopile is reported by Abhinav and Saha (2017). The analysis work was performed by modelling various soil conditions (a medium-dense sand, a stiff clay and a layered profile) using a non-linear ground-to-spring model, and considered operational and extreme wind and wave conditions. Results indicate that the dynamic response mainly depends on the stiffness of the soil and the authors reiterate the need for detailed site-specific geotechnical investigations before designing such foundations.The last two papers report on fie...

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Proceedings of the Institution of Civil Engineers - Geotechnica

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Earth pressure on anchor–shotcrete retaining structures

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