A NEW SIMPLE SHEAR APPARATUS FOR TESTING UNSATURATED SOILS

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RAHNENMA A.; HABIBAGAHI G.; GHAHRAMANI A.

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING Year:2003 | Volume:27 | Issue:B1 Page(s): 0-0

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Title

A NEW SIMPLE SHEAR APPARATUS FOR TESTING UNSATURATED SOILS

Author(s)

RAHNENMA A. | HABIBAGAHI G. | GHAHRAMANI A. | Issue Writer Certificate

Keywords

SIMPLE SHEAR TEST

UNSATURATED SOIL

TRIAXIAL

LABORATORY EQUIPMENT

SOIL SUCTION

Abstract

A new simple shear apparatus which is capable of applying monotonic and cyclic load on soil specimens is fabricated. Cylindrical specimens are placed in a special triaxial type cell where confining pressure, pore air and pore water pressures can be controlled. The apparatus consists of an inner part and an outer portion. The inner portion that is inside the TRIAXIAL cell consists of a pedestal attached to a movable base. The movable base is mounted on a pair of horizontal rolling tables, which makes the inner portion capable of moving back and forth, horizontally. The outer portion consists of a cylindrical frame that holds the top cap and prevents its lateral movement. A high air entry ceramic disk is sealed into the pedestal using an epoxy resin. The specimen is sheared in a simple shear mode. The horizontal load required to shear the specimen, divided by the nominal area of the specimen gives the shear stress. SOIL SUCTION can be measured using the so-called axis-translation technique [1] by increasing the pore air pressure through the top low air entry disk and recording the pore water pressure through the high air entry ceramic disk. Using the fabricated apparatus it is possible to measure and control the vertical normal stress as well as the all-around confining pressure applied to the soil specimen. Hence, testing the soil under initial isotropic or anisotropic confining pressure could be easily achieved. In this paper, the main features of the apparatus are discussed via some test results carried out on UNSATURATED SOIL specimens.

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APA: Copy

RAHNENMA, A., HABIBAGAHI, G., & GHAHRAMANI, A.. (2003). A NEW SIMPLE SHEAR APPARATUS FOR TESTING UNSATURATED SOILS. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, 27(B1), 0-0. SID. https://sid.ir/paper/527742/en

Vancouver: Copy

RAHNENMA A., HABIBAGAHI G., GHAHRAMANI A.. A NEW SIMPLE SHEAR APPARATUS FOR TESTING UNSATURATED SOILS. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING[Internet]. 2003;27(B1):0-0. Available from: https://sid.ir/paper/527742/en

IEEE: Copy

A. RAHNENMA, G. HABIBAGAHI, and A. GHAHRAMANI, “A NEW SIMPLE SHEAR APPARATUS FOR TESTING UNSATURATED SOILS,” IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, vol. 27, no. B1, pp. 0–0, 2003, [Online]. Available: https://sid.ir/paper/527742/en

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