碎石桩软土复合地基整体抗剪强度研究

发布时间：2018-05-14 19:38

本文选题：振冲碎石桩 + 软土复合地基　；参考：《水运工程》2016年05期

【摘要】：振冲碎石桩作为散体材料桩与周围的软土形成的复合地基,同钢筋混凝土桩、钢管桩等刚性桩形成的复合地基在工作原理、承载力分析等方面存在着本质的不同。与刚性桩相比,碎石桩作为垂直排水通道,能够加快周围软土的排水固结,提高桩间土的整体强度。同时碎石桩自身的承载力发挥又取决于周围土体的侧向支撑作用。如何确定碎石桩复合地基的整体抗剪强度对于发挥碎石桩的作用至关重要。以港珠澳大桥香港口岸人工岛项目碎石桩的工程应用为例,对比碎石桩软土复合地基整体抗剪强度计算的异同,通过数值模拟和现场监测等手段对参数取值进行分析,对今后类似工况条件下碎石桩复合地基的抗剪强度计算具有指导意义。
[Abstract]:As a composite foundation formed by bulk material pile and surrounding soft soil, vibro-impact gravel pile is essentially different from rigid pile such as reinforced concrete pile and steel pipe pile in working principle and bearing capacity analysis. Compared with rigid pile, gravel pile, as a vertical drainage channel, can accelerate the drainage consolidation of surrounding soft soil and improve the overall strength of soil between piles. At the same time, the bearing capacity of gravel pile depends on the lateral support of surrounding soil. How to determine the overall shear strength of gravel pile composite foundation is very important to play the role of gravel pile. Taking the application of gravel pile in artificial island project of Hong Kong Port of Hongkong-Zhuhai-Macao Bridge as an example, this paper compares the differences and similarities of the calculation of overall shear strength of gravel pile soft soil composite foundation, and analyzes the parameters by means of numerical simulation and on-site monitoring. It is of guiding significance for the calculation of shear strength of gravel pile composite foundation under similar working conditions in the future.
【作者单位】：中国港湾工程有限责任公司;河海大学;
【分类号】：P75;TU470

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