长短桩组合多元复合桩基技术的应用研究

论述了长短桩组合多元复合桩基的设计原理，分析了复合桩基承载力和地基沉降的计算方法。并结合灰砂桩与CFG桩组合桩基处理工程实例，介绍了按长短桩多元复合桩基设计计算、施工技术和处理效果。实践证明，长短桩复合桩基组合形式多样，不受桩型选择限制，可实现单元组合或多元组合，它能充分发挥桩间土、短桩和长桩三者的潜能，大幅度地减少了长桩的用量，确保地基承载能力，并可有效地控制基础整体沉降和差异沉降，其应用前景广阔。

Research on application of technology of composite pile foundation with short and long piles

The design philosophy,calculational methods of bearing capacity and settlement of multi-element composite pile foundation with long and short piles are discussed.Meanwhile,taking foundation treatment engineering of compounding with lime-sand pile and CFG pile for example,the design,construction technique and treating effect on it are described.Engineering practice shows that,the composite pile foundation with long and short piles has multifarious compounding form,which do not restrict types of piles,which c...