CAJ | 학술논문

把强夯单击瞬时变形简化为侧限变形，运用Boyle定律分析孔隙气体的体积变化，根据有效加固深度、影响深度与夯沉量的关系确定孔隙气压力随深度的衰减系数，建立夯沉量计算模型，并用工程实例验证了该模型的可靠性。采用提出的单击夯沉量计算模型，分析了夯前土体饱和度、孔隙比、夯击能对强夯加固位移模式和夯击效率的影响。采用最大孔隙比变化量和附加孔隙气压力随深度的衰减系数β描述强夯加固位移模式，结果表明：系数β与孔隙比无关，只与饱和度和夯击能有关；随着夯击能的增大，夯击效率降低。设夯击效率与夯击能曲线的最大曲率所对应的夯击能为最优夯击能，求出最优夯击能与饱和度、孔隙比的关系，结果表明：随着饱和度的增大最优夯击能减小，随着孔隙比的增大最优夯击能增大。
파강항단격순시변형간화위측한변형，운용Boyle정률분석공극기체적체적변화，근거유효가고심도、영향심도여항침량적관계학정공극기압력수심도적쇠감계수，건립항침량계산모형，병용공정실례험증료해모형적가고성。채용제출적단격항침량계산모형，분석료항전토체포화도、공극비、항격능대강항가고위이모식화항격효솔적영향。채용최대공극비변화량화부가공극기압력수심도적쇠감계수β묘술강항가고위이모식，결과표명：계수β여공극비무관，지여포화도화항격능유관；수착항격능적증대，항격효솔강저。설항격효솔여항격능곡선적최대곡솔소대응적항격능위최우항격능，구출최우항격능여포화도、공극비적관계，결과표명：수착포화도적증대최우항격능감소，수착공극비적증대최우항격능증대。
The transient deformation of single tamp was assumed as confined deformation. The volume change of void atmosphere was analyzed by Boyle law. On the basis of the relationship between effective reinforced depth and influential depth and tamping settlement,attenuation coefficient of void atmosphere with depth was calculated. Computation model of tamping settlement was studied. The reliability of the model was verified by an engineering project. The effect of saturation degree and void ratio of soil mass before tamping and impact energy on the displacement model of single tamp and efficiency of compact energy was studied. The displacement model of dynamic consolidation could be described by maximum of variation of porosity ratio and attenuation coefficient (β)of additional pore air pressure with depth. The results indicate thatβis not related to void ratio and related to saturation and compact energy. The impact efficiency decreases when tamping energy increases. The optimal compact energy is assumed as maximal curvature Kmax of impact efficiency-compact energy diagram. The relationship between optimal compaction energy and saturation and void ratio is analyzed. The optimal compact energy decreases when the saturation degree is increased and the porosity ratio decreased.