CAJ | 학술논문

以西部某千枚岩软岩隧道为工程背景，采用三维有限元数值模拟手段对不同喷层厚度条件下围岩的洞周位移、喷层混凝土内力进行对比分析，对其随喷层厚度增加的变化规律进行研究。结果表明：喷射混凝土厚度的大小对软岩隧道围岩变形的控制作用不明显；喷层厚度的大小对下台阶开挖后的内力影响显著；喷射混凝土厚度对围岩变形控制具有一定作用，但仅限于一定厚度范围内，当喷层厚度超过一定量值后，喷层对于围岩变形控制效果将不再明显，但其对喷层内力的影响却更加显著。
이서부모천매암연암수도위공정배경，채용삼유유한원수치모의수단대불동분층후도조건하위암적동주위이、분층혼응토내력진행대비분석，대기수분층후도증가적변화규률진행연구。결과표명：분사혼응토후도적대소대연암수도위암변형적공제작용불명현；분층후도적대소대하태계개알후적내력영향현저；분사혼응토후도대위암변형공제구유일정작용，단부한우일정후도범위내，당분층후도초과일정량치후，분층대우위암변형공제효과장불재명현，단기대분층내력적영향각경가현저。
With some phyllite soft-rock tunnel in the west as project background, this paper comparatively analyzes convergence displacement of wall rock and inner force of spray layer concrete under the condition of different spray layer thicknesses by mean of 3 D finite element numerical simulation method and studies the change laws of them with increase of spray layer thickness. The results show that the control effect of the thickness of sprayed concrete on wall rock deformation of soft-rock tunnels is not obvious; the thickness of spray layer remarkably affects the inner force after excavation of lower bench;the thickness of sprayed concrete has a certain effect on control of wall rock deformation, but is only limited to a certain thickness range, as the thickness of spray layer is over a certain value, the control effect of spray layer on wall rock deformation will not be obvious any longer, however it influence on inner force of spray layer is more remarkable.