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An examination of the mechanical interaction of drilling slurries at the soil-concrete contact

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第4期11卷 294-304页

作者： Ressol R.SHAKIR Key Laboratory of MOE for Geomechanics and Embankment Engineering Hohai University Geotechnical Research Institute Hohai University

Evidence gained from previous field tests conducted on drilled shaft foundation shows that using drilling slurries to stabilize a borehole during the construction may influence the interfacial shear *** paper deals with an exhaustive study of the effects of drilling slurries at the contact between soil and *** study involved adapting a simple shear apparatus and performing approximately 100 experimental tests on the interaction between two types of soils;clay and sandy clay and five specimens of concrete with different surface *** also involved using bentonite and polymer slurries as an interface layer between soil and *** showed that an interface layer of bentonite slurry between clay and concrete decreases the interfacial shear strength by 23% and as an interface layer between sandy clay and concrete,bentonite increases interfacial shear strength by 10%.Using polymer slurry as an interface layer between clay and concrete decreases the interfacial shear strength by 17% while using it as an interface layer between sandy clay and concrete increases the interfacial shear strength by 10%.Furthermore,the data show that using bentonite and polymer slurry as an interface layer between clay and concrete decreases the sliding ratio by 50% to 60%,while increasing the sliding ratio by 44% to 56% when these are used as an interface layer between sandy clay and concrete.

关键词： drilled shaft foundation Drilling slurry Polymer Bentonite Simple shear test Concrete surface Soil structure interaction Mudcake

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