卵石地层中CFG桩的设计及其施工技术

Design and Construction Technology of CFG Plie in Pebble Stratum

摘要:

某工程项目位于北京市门头沟区，场地内卵石、碎石地层层厚大，施工困难，选用CFG桩进行地基处理。考虑场地地层条件、施工设备、项目工期以及工程造价，按变形控制对CFG桩进行设计，同时根据场地条件及CFG桩特点制定了施工流程。对CFG桩施工中可能出现的问题，提出了相应的质量控制措施，如埋设护筒、选用合适的旋挖钻头等。

Abstract:

The paper introduces an engineer project in Mentougou of Beijing, the construction was difficult because of the thick pebble and crushed stone layer in the site, CFG pile was selected for foundation treatment. In view of the formation conditions, construction equipments, project construction period and cost of the project, CFG pile was designed with deformation control and according to the site conditions and the characteristics of CFG pile, construction process was formulated. For the problems may arise in the CFG pile construction, the corresponding quality control measures are put forward, such as embedment of steel protective pipe and selection of appropriate rotary drilling bit.