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Peak impact force test of a slope granular impact retaining wall |
YUAN Jinke,CHEN Jie |
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China |
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Abstract The peak impact force of slope granule is an important control parameter in the design of granular protection. Through the designed slope granular impact test device, the different weight, particle shape, impact velocity, incident angle and thickness of barrier wall are selected as the test parameters to carry out the slope granular impact simulation test. The impact simulation test of the retaining wall analyzes the relationship between factors and peak impact force. The results show that the peak impact force of granular particles impacting the retaining wall is distributed in the middle of the wall. The peak impact force of spherical particles and granular particles is the largest at an incident angle of 90°. The time history curve of the impact force has nonlinear characteristics: Linear increase, non-linear decrease and stabilization stage. The degree of importance of peak impact force is particle shape>impact velocity>weight of granular body>retaining wall thickness>impact angle of incidence. The calculated value of impact force in Chinese debris flow code is relatively close to the measured value, the
tunnel manual method takes into account the material properties and structural characteristics of the retaining wall. The combination of two calculation methods provide a reference for prevention and control of granular disasters.
Keywords: slope; granular; retaining wall; peak impact force; physical simulation;
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Received: 22 June 2021
Published: 28 September 2022
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