The collapse of the bank slope of the floodplain in the lower reaches of the Yellow River has compressed the production space of the people in the floodplain and caused great economic losses.Therefore,based on the survey,sampling and indoor geotechnical tests of the beach from Wantanzhen to Liuyuankou,the soil composition and structural characteristics of the beach were analyzed,and the influence of water content changes to the soil strength was studied.Then,Optum G2 was used to study the influence of soil strength changes to the stabili-ty of multi-layer soil beaches.The results show that the beach bank in the section from Wantanzhen to Liuyuankou of the Yellow River is com-posed of clay and silt soil,and exhibits an alternating layered structure;with the increase of water content,the cohesion of clay and silt will increase first and then decrease,and the internal friction angle will gradually decrease;moisture content has a significant impact on the strength of bank slope soil,water content increases from 18%to 40%,the cohesion of the clay layer decreases by 80%,and the internal fric-tion angle decreases by about 87%;the slope stability of the beach-bank combination decreases,and the slope stability coefficient first in-creases and then decreases with the increase of water content.
关键词
滩岸/交互分层/Optum/G2/含水率/稳定性/黄河下游滩岸
Key words
beach/interactive layering/Optum G2/moisture content/stability/lower Yellow River beach
维普
万方数据