CAJ | 학술논문

国内外许多学者基于假定桩体材料排水能力为无限大基础上，研究了碎石桩复合地基排水减压作用在饱和粉土地基抗震液化方面的特性。在实际工程中，碎石桩的排水能力与地基土体相比是在一个可比的数量级上，并不是无限大的。利用巴隆固结理论，优化相应的边界条件和初始条件，综合考虑在地震作用时间极短的状况下，引起的超孔压消散速度是有限的，以及散体材料本身会对进入桩体中的水的垂直渗流有一定的阻力作用等条件下，研究了碎石桩在地震作用期间的排水减压作用，并提出了由地震引起的碎石桩复合地基中超孔压发展规律的拟合公式。经过工程实例的对比分析，对碎石桩排水减压作用在抗震液化能力提高方面进行评价，为饱和粉土地基抗震液化设计提供一定的参考。
국내외허다학자기우가정장체재료배수능력위무한대기출상，연구료쇄석장복합지기배수감압작용재포화분토지기항진액화방면적특성。재실제공정중，쇄석장적배수능력여지기토체상비시재일개가비적수량급상，병불시무한대적。이용파륭고결이론，우화상응적변계조건화초시조건，종합고필재지진작용시간겁단적상황하，인기적초공압소산속도시유한적，이급산체재료본신회대진입장체중적수적수직삼류유일정적조력작용등조건하，연구료쇄석장재지진작용기간적배수감압작용，병제출료유지진인기적쇄석장복합지기중초공압발전규률적의합공식。경과공정실례적대비분석，대쇄석장배수감압작용재항진액화능력제고방면진행평개，위포화분토지기항진액화설계제공일정적삼고。
Based on the assumption that the pile material’s drainage capacity is infinite ,many scholars at home and abroad have researched on the earthquake-resistance liquefaction characteristics of the stone column’s drainage capacity on saturated silt foundation .However ,in practical projects ,the drainage capacity of stone column is not infinite .Here , by using Barron consolidation theory ,and comprehensively considering that the dissipation velocity of the excess pore pressure induced by earthquake during the extremely short time is limited and the dispersed material has a certain resis -tance effect on verticle infiltration ,the drainage and pressure-reducing action of the stone column during earthquake was studied ,and the fitting formula for the development of the excess pore pressure was proposed including its generation , diffusion and dissipation .Meanwhile ,the action of the stone column for raising the earthquake-resistance liquefaction was evaluated through the comparison and analysis of engineering examples ,which would provide a certain reference for the design of saturated silt foundation .