Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand

Comparative pullout tests were carried out on model plate anchors in uncemented aeolian sand (UAS) and cement-stabilised aeolian sand (CAS) with different embedment ratios of the embedment depth (H) to the width (D) of the plate to examine the effectiveness of the insertion of cement in aeolian sand...

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Autores principales:	Zengzhen Qian, Mingqiang Sheng, Faming Huang, Xianlong Lu
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	aeolian sand cement-treated soil stabilisation backfills pullout ultimate bearing capacity Science Q
Acceso en línea:	https://doaj.org/article/727aca8e54584c63bc1ff48b0f0854e3
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spelling	oai:doaj.org-article:727aca8e54584c63bc1ff48b0f0854e32021-11-18T06:04:32ZUplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand2296-646310.3389/feart.2021.783148https://doaj.org/article/727aca8e54584c63bc1ff48b0f0854e32021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.783148/fullhttps://doaj.org/toc/2296-6463Comparative pullout tests were carried out on model plate anchors in uncemented aeolian sand (UAS) and cement-stabilised aeolian sand (CAS) with different embedment ratios of the embedment depth (H) to the width (D) of the plate to examine the effectiveness of the insertion of cement in aeolian sand to enhance the uplift performance of plate anchors. Experimental results demonstrated that significant increases in failure resistance and uplift stiffness can be achieved, irrespective of embedment ratios of H/D, when a relatively small amount of cement (an optimal cement content of 6% by weight of dry aeolian sand determined by direct shear test in this study) was added to the aeolian sand backfill. However, distinct load–displacement responses were observed in all the tests on the model plate anchors embedded in CAS and UAS backfills: two-phase of pre-peak and post-peak behaviour in CAS and three-phase of initial linear, nonlinear transition to peak uplift resistance, and post-peak behaviour in UAS; failure of the former started at tiny displacements and that of the latter appeared at large displacements. Therefore, the significant increases in uplift failure resistance and pre-peak uplift stiffness were limited to relatively low uplift displacements because of the brittle nature of the improved CAS backfills shear strength characteristics.Zengzhen QianMingqiang ShengFaming HuangXianlong LuFrontiers Media S.A.articleaeolian sandcement-treated soilstabilisationbackfillspulloutultimate bearing capacityScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aeolian sand cement-treated soil stabilisation backfills pullout ultimate bearing capacity Science Q
spellingShingle	aeolian sand cement-treated soil stabilisation backfills pullout ultimate bearing capacity Science Q Zengzhen Qian Mingqiang Sheng Faming Huang Xianlong Lu Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
description	Comparative pullout tests were carried out on model plate anchors in uncemented aeolian sand (UAS) and cement-stabilised aeolian sand (CAS) with different embedment ratios of the embedment depth (H) to the width (D) of the plate to examine the effectiveness of the insertion of cement in aeolian sand to enhance the uplift performance of plate anchors. Experimental results demonstrated that significant increases in failure resistance and uplift stiffness can be achieved, irrespective of embedment ratios of H/D, when a relatively small amount of cement (an optimal cement content of 6% by weight of dry aeolian sand determined by direct shear test in this study) was added to the aeolian sand backfill. However, distinct load–displacement responses were observed in all the tests on the model plate anchors embedded in CAS and UAS backfills: two-phase of pre-peak and post-peak behaviour in CAS and three-phase of initial linear, nonlinear transition to peak uplift resistance, and post-peak behaviour in UAS; failure of the former started at tiny displacements and that of the latter appeared at large displacements. Therefore, the significant increases in uplift failure resistance and pre-peak uplift stiffness were limited to relatively low uplift displacements because of the brittle nature of the improved CAS backfills shear strength characteristics.
format	article
author	Zengzhen Qian Mingqiang Sheng Faming Huang Xianlong Lu
author_facet	Zengzhen Qian Mingqiang Sheng Faming Huang Xianlong Lu
author_sort	Zengzhen Qian
title	Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
title_short	Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
title_full	Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
title_fullStr	Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
title_full_unstemmed	Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand
title_sort	uplift performance of plate anchors in cement-stabilised aeolian sand
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/727aca8e54584c63bc1ff48b0f0854e3
work_keys_str_mv	AT zengzhenqian upliftperformanceofplateanchorsincementstabilisedaeoliansand AT mingqiangsheng upliftperformanceofplateanchorsincementstabilisedaeoliansand AT faminghuang upliftperformanceofplateanchorsincementstabilisedaeoliansand AT xianlonglu upliftperformanceofplateanchorsincementstabilisedaeoliansand
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Uplift Performance of Plate Anchors in Cement-Stabilised Aeolian Sand

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