Experimental Study on Wave Dissipation and Deformation Characteristics of Granular Particles Under Low-Velocity Impact Conditions
In order to reveal the effect of the water environment on the wave-absorbing ability of the distribution layer of underground protective structures,the wave-absorbing properties of sand and hollow brittle particles were studied by low-velocity impact tests,and the stress and deformation patterns of the granular materials under dry/saturated,drained/undrained,dense/loose conditions were obtained.The test results show that pore water has a very adverse effect on the wave-absorbing ability of granular mate-rials,and the wave-absorbing ability of sandy materials under undrained loose condition is only 12.0%of that under dry condition.The wave-absorbing ability of hollow brittle particles is significantly better than that of sand soil.Under dry and loose conditions,undrained and loose conditions,undrained and dense conditions and loose drainage conditions,the bottom stresses of hollow brittle particles are 59.2%,70.8%,30.7%and 36.1%of that of sand materials under the corresponding working conditions,respec-tively.Hollow brittle particles can better maintain compressibility during the impact process.The locking strain of traditional wave absorbing materials is only 6.1%under undrained loose conditions,while the locking strain of hollow brittle particles can reach 42.2%,and the locking modulus is only 28.5%of that of sandy soil.The test results can provide ideas and references for solving the problem of water damage to wave protection layers.
NETL
NSTL
万方数据
维普
