- 摘 要
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(中冶建筑研究总院有限公司, 北京 100088)
[摘要]通过对CFG桩复合地基与钢筋混凝土独立基础计算理论和计算方法进行梳理和理论分析,并结合同一框架结构单元采用不同基础埋深工程设计算例,运用现代化计算机辅助设计技术,详细论述CFG桩复合地基与钢筋混凝土独立基础设计计算全过程。工程设计实践和研究表明,相同的CFG桩端标高和面积置换率也适用于不同基础埋深的CFG桩复合地基和基础结构设计。利用所提出的现代化计算机辅助设计技术,考虑不同基础埋深、基底下土层厚度分布和相邻基础荷载影响及选用对应于每层土实际应力状态的天然地基压缩模量的CFG桩复合地基变形计算方法,既符合工程实际情况,又满足规范要求。
[关键词]CFG桩复合地基; 钢筋混凝土独立基础; 基础埋深; 土层分布; 计算全过程; 应力状态
中图分类号:TU473文献标识码:A文章编号:1002-848X(2015)11-0075-06
Design on CFG pile composite foundation and reinforced concrete independent foundation
Dang Yujing
(Central Research Institute of Building and Construction MCC, Beijing 100088, China)
Abstract:The calculation theories and calculation methods for cement fly-ash gravel (CFG) pile composite foundation and reinforced concrete independent foundation were reviewed and theoretically analyzed. Combined with the same frame structure unit with different foundation depths in different engineering design examples, calculation whole process of CFG pile composite foundation and reinforced concrete independent foundation design was introduced in detail by using modern computer aided design technique.
Engineering design practice and research show that the same CFG pile tip elevation and area replacement ratio are also applicable to CFG pile composite foundation and foundation structure design with different foundation depths. Using the proposed modern computer aided design technique and taking effects of foundation depth, substrate soil thickness distribution and adjacent foundation load into consideration, the proposed CFG pile composite foundation deformation calculation method adopted compression modulus of natural foundation corresponding to the practical of stress state of each layer of soil, which is consistent with the actual situation of the project and meets the requirements of specifications.
Keywords:CFG pile composite foundation; reinforced concrete independent foundation; foundation depth; soil distribution; calculation whole process; stress state
作者简介:党昱敬,教授级高级工程师,注册土木工程师(岩土),Email:dyj765@sina.com。
参考文献
[1]JGJ 79—91 建筑地基处理技术规范[S].北京:中国建筑工业出版社,1991.
[2]JGJ 79—2002 建筑地基处理技术规范[S].北京:中国建筑工业出版社,2002.
[3]JGJ 79—2012 建筑地基处理技术规范[S].北京:中国建筑工业出版社,2013.
[4]党昱敬.CFG桩复合地基设计的几点认识[J].建筑结构,2013,43(24):80-83.
[5]党昱敬,柳建国.上部结构、基础和地基协同工作时刚性桩复合地基沉降计算分析[J].建筑结构,2010,40(1):65-68.
[6]GB 50007—2011建筑地基基础设计规范[S]. 北京:中国建筑工业出版社,2012.
[7]中国建筑科学研究院PKPM CAD工程部. JCCAD用户手册及技术条件[M].北京, 2012.
[8]JGJ 94—2008建筑桩基技术规范[S].北京:中国建筑工业出版社,2008.
[9]党昱敬.刚性桩复合地基沉降计算方法的研究及应用[J].建筑技术,2012(3):243-247.
[10]顾晓鲁,钱鸿缙,刘惠珊,等.地基与基础[M].北京:中国建筑工业出版社,2003.
[11]张明远,陈丽萍,霍凯成.某工程基于差异沉降控制的CFG桩复合地基处理[J].建筑结构,2007,37(11):39-41.
[12]刘金波,李文平,刘民易,等.建筑地基基础设计及实例[M].北京:中国建筑工业出版社,2013.