CAJ | 학술논문

水泥粉煤灰碎石桩简称 CFG 桩。本文以某小区地基处理工程为例，采用数值模拟方法，从桩-桩间土、桩-桩端、桩-桩长、桩-桩身弹性模量等的沉降关系及复合地基-置换率、褥垫层―桩土应力的关系几个方面对 CFG 桩的桩土作用进行研究。结果表明，桩沉降量随着桩间土模量、桩端模量、桩身弹性模量、桩长、置换率等的增加沉降量减少。褥垫层越薄，桩顶应力越大，桩间土应力越小，垫层越厚，桩顶应力越小，但垫层厚度超过一定的临界值后，对桩土间应力就不会产生较大影响。得出 CFG 桩复合地基的适用性，为同类工程技术施工提供参考。
수니분매회쇄석장간칭 CFG 장。본문이모소구지기처리공정위례，채용수치모의방법，종장-장간토、장-장단、장-장장、장-장신탄성모량등적침강관계급복합지기-치환솔、욕점층―장토응력적관계궤개방면대 CFG 장적장토작용진행연구。결과표명，장침강량수착장간토모량、장단모량、장신탄성모량、장장、치환솔등적증가침강량감소。욕점층월박，장정응력월대，장간토응력월소，점층월후，장정응력월소，단점층후도초과일정적림계치후，대장토간응력취불회산생교대영향。득출 CFG 장복합지기적괄용성，위동류공정기술시공제공삼고。
Cement fly-ash gravel pile is known as CFG pile in short.This paper cites a ground treatment pro-ject in a certain housing estate as an example,and the numerical simulation method is applied.The research is conducted on pile-soil interaction of CFG pile from aspects of settlement relationship of pile-soil between piles,pile-pile tip,pile-pile length and pile-pile elastic modulus as well as relationship of composite foun-dation-the replacement rate and cushion-pile-soil stress.The results show that the pile settling volume de-creases as modulus of the soil between piles,pile tip modulus,pile elastic modulus,pile length,replacement rate increase.The thinner the cushion is,the greater the pile head stress is,and the lower the stress of soil between piles is;the thicker the cushion is,the lower the pile head stress is;yet when the cushion thickness exceeds a certain critical value,it has little effect on stress of soil between piles.The feasibility of CFG pile composite foundation is generated,which provides a good reference for other similar technical construction projects.