湿陷性黄土地区灰土挤密桩设计方案研究

Research on Design Scheme of Lime-soil Compaction pile in Collapsible Loess Regions

摘要:

采用正交实验的方法，通过研究灰土挤密桩在西北湿陷性黄土地区基础处理的影响因素和验收指标情况，详细对桩径、桩间距、灰土掺量、挤密能量等级与最后验收工程的控制指标的影响关系进行了阐述。系统研究了影响因子包括灰土掺量、桩桩径、桩间距、填灰击实能量等对桩间土压实度、复合地基承载力、瑞利波法测试结果等相关参数的具体量化影响。结论结合实际情况，给出对应特定工程，采用灰土挤密桩工法的具体参数指标和指导意见，为日后相应类型的工程项目提供了系统化的理论支撑。

Abstract:

The orthogonal experiment method is used to study the influence factors and acceptance indexes of lime-soil compaction piles on foundation treatment in the northwest collapsible loess area. The influences of pile diameter, pile spacing, lime soil content, compaction energy level on the control index of final acceptance project are described in detail. The quantitative effects of the influencing factors including lime soil content, pile diameter, pile spacing and ash compaction energy on the soil compaction degree between piles, composite foundation bearing capacity and Rayleigh wave test results are systematically studied. The conclusions in combination with the actual situation give the specific parameter indexes and guidelines of lime-soil compaction pile method for corresponding specific projects, which provide the systematic theoretical support for corresponding types of projects in future.