摘要
Abstract
In order to study the deformation characteristics of high slope under different support modes,based on the high slope in the open tunnel section at the entrance of a tunnel,theeffects of three support modes,non-support,full-section soil nailing support and composite sup-port with soil nailing and pre-reinforced pile under the upper soil nailing,were compared and analyzed by centrifugal model test.The results show that,compared with the conditions of no support and soil nailing,the pile-nailing composite support has a better effect in enhancing slope stability.Under the condition of pile and nail composite support,after the third stage excavation,the slope is still in a stable state,its total settlement is only 12.34 mm,and the maximum horizontal displacement is 2.28 mm.The top soil nails bear the main tensile stress in the exca-vation stage,and the lower soil nails can effectively share the displacement of the slope in the deep excavation stage,and enhance the overall stability of the slope.关键词
高边坡/土钉支护/桩钉复合支护/离心模型试验Key words
High slope/Soil nailing support/Pile and nail composite support/Centrifugal model test分类
建筑与水利
