CFG桩复合地基沉降计算方法的修正

Correction about Settlement Calculation Method of CFG Pile Composite Foundation

在复合地基设计中,除满足地基承载力要求外,还要核算地基变形是否满足设计要求。目前,复合地基变形计算广泛采用的是地基处理规范中的半理论、半经验方法,但大量的沉降监测数据表明,工程中普遍应用的CFG桩复合地基的实际沉降值远远小于按规范计算方法得到的沉降值。针对现行规范中CFG桩复合地基沉降计算方法存在的问题,综合借鉴前人在天然地基和复合地基方面的研究,提出个人的见解和修正公式,以期达到安全可靠经济实用的目的,为以后CFG桩复合地基的沉降计算提供理论依据。

In the design of composite foundation, in addition to meeting the foundation bearing capacity also meeting the ground deformation design requirements. At present, the deformation calculation of composite foundation widely adopted semi- theoretical, semi empirical method from ground handling practices, but a lot of settlement monitoring data show the real sedi- mentation of CFG pile composite foundation far less than calculated value which calculate according to standardized methods. This article aims at the defect of settlement calculation methods which about CFG pile composite foundation and reference re- searches in natural ground and composite foundation. This article proposes a correction formula and some personal opinions to get the goal which is safe and reliable economic and practical in the same time provide a theoretical basis for settlement calcula- tion of CFG pile composite foundation.