CAJ | 학술논문

为了分析柔性基础下水泥搅拌桩复合地基桩土应力比的特性，提出纯摩擦桩位移模式；根据纯摩擦桩变形特点，确定复合地基中性点的位置；根据柔性基础下桩体复合地基的变形协调条件，确定柔性基础下桩体复合地基桩土应力比的表达式。实例计算表明，计算结果与实测值比较接近，柔性基础下水泥搅拌桩复合地基桩土应力比值一般在2～4，当其他条件不变时，桩土应力比随垫层模量、桩土模量比增大而增大，随垫层厚度增加而减小，且垫层模量对桩土应力比的影响较大。
위료분석유성기출하수니교반장복합지기장토응력비적특성，제출순마찰장위이모식；근거순마찰장변형특점，학정복합지기중성점적위치；근거유성기출하장체복합지기적변형협조조건，학정유성기출하장체복합지기장토응력비적표체식。실례계산표명，계산결과여실측치비교접근，유성기출하수니교반장복합지기장토응력비치일반재2～4，당기타조건불변시，장토응력비수점층모량、장토모량비증대이증대，수점층후도증가이감소，차점층모량대장토응력비적영향교대。
In order to analyze the characteristics of pile - soil stress ratio of the composite foundation of cement - soil mixing pile under flexible foundation, the displacement mode of friction pile was pointed out, according to the deformation charac- teristic of friction pile, the neutral point of composite foundation was ascertained. And the exact formula about length - stress ratio which addresses the problem of soft soil foundation according to the deformation co - ordination conditions of the pile composite foundation was also derived. The calculation of actual example proves that the formula about pile - soil stress ratio is in accordance with actual measurement number. The pile - soil stress ratio which addresses the problem of soft soil foundation is generally between 2 - 4. If other conditions keep invariable, pile - soil stress ratio become big when cushion modulus become big. And pile - soil stress ratios become small when cushion become deep, cushion modulus effect the length -stress ratio greatly.