基于扩孔理论的挤密砂桩桩身压缩模量理论计算方法

摘要

This article makes a research by mainly adopting the reaming theory and the zhu﹣jiang shen cohesionless soil compression modulus theory,which deduces the theorical calculation formula of pile body compression modulus under the condition of different anti interpolation ratio of the sand compaction piles.At the same time,combined with specific Hanoi﹣haiphong highway project,we will use the different design anti interpolation ratio on basis of the depth and soil layer.According to the analysis on the change rule of sand compaction pile body compression modulus.We can get the main conclusion that pile body compression modulus will have the rough linear variation as the value c;changes based on the anti inter﹣polation fixes.The contents of this paper are very important to start designing sand compaction pile com﹣posite foundation,which can provide reference for the future design and construction.%采用了扩孔理论与沈珠江无粘性土体压缩模量的理论研究，推导了挤密砂桩不同反插比情况下桩体压缩模量的理论计算公式。同时结合具体的越南河内－海防高速公路工程项目，对不同土层、不同深度采用不同设计反插比，挤密砂桩桩体的压缩模量变化规律进行分析。得出主要结论为在反插比固定下，桩身压缩模量随c、φ值得变化大致呈线性变化。所研究的内容为开展挤密砂桩复合地基的设计起到非常重要的作用，可以为以后的设计与施工提供参考。