American Society of Civil Engineers

Impact Based Testing Technique for Measuring Strength of Geomaterials

by Jiaye Wu, Ph.D., P.E., (Professor, Sichuan University of Science and Technology, Zigong, Sichuan P.R. China 64300. Chief Executive Officer, Sichuan Central Inspection Technology Co., Ltd., Chengdu, Sichuan, China 610041. E-mail:, Yukiyoshi Kitamoto, (Kajima Corporation, Chofu, 182-0036, Tokyo, Japan. E-mail:, Teru Yoshita, (Kajima Corporation, Chofu, 182-0036, Tokyo, Japan. E-mail:, Takeshi Ikejiri, (Central Giken Co., Ltd., Hachioji, 192-0063, Tokyo, Japan. E-mail:, Song He, (Senior engineer/vice director, Research Institute of Highway, Beijing, China. E-mail:, and Jiaer (Jerry) Wu, Ph.D., P.E., M.ASCE, (URS Corporation, 1333 Broadway Suite 800, Oakland, CA 94612, USA. E-mail:

pp. 141-149, (doi:

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Document type: Conference Proceeding Paper
Part of: Contemporary Topics on Testing, Modeling, and Case Studies of Geomaterials, Pavements, and Tunnels
Abstract: This paper presents a rapid geomaterial strength testing method that measures the impact process of a spherical object colliding with a test material. This method is based on Vesic (1977) cavity expansion theory and combines with the technology developed for measuring deformation characteristics (in a companion paper by the authors). In this new method, a geomaterial’s strength parameters including its internal friction angle φ and cohesion c are directly calculated. Results from validation tests demonstrated satisfactory testing accuracy of this method and its unique advantages comparing with conventional laboratory strength tests.

ASCE Subject Headings:
Material tests