有机泥浆理化特性研究及其工程应用

Study on Physical and Chemical Properties of Organic Mud and Its Engineering Application

分析了普通无机泥浆护壁机理,提出了钻孔护壁有机泥浆新概念,并通过室内对比试验研究了桩基钻孔护壁有机泥浆的物理性能与HPAM加入量的相关关系以及HPAM的降解过程,并将有机泥浆应用于成都某卵石地层钻孔灌注桩施工。通过室内试验与实际工程应用,综合分析了不同黏粒含量有机泥浆的优缺点,提出了适用于钻孔护壁的有机泥浆配比,并对有机泥浆的降解和环保做了深入地分析,得出有机泥浆是可降解的结论,为钻孔灌注桩护壁施工提供了新的途径。

This paper analyzes the wall protection mechanism of the common inorganic mud, propsoing the new concept of borehole wall protection organic mud, and study the relationship between the physical properties of pile borehole wall protection organic mud with the amount of HPAM by the laboratory comparative experiments, and the degradation process of HPAM,and the organic mud used in bored pile of pepple stratum in Chengdu. Through the laboratory experiments and the practical engineering application,a comprehensive analysis of the advantages and disadvantages of different clay content of or- ganic mud, proposing the organic mud ratio applicable to the borehole wall protection, and do thorough analysis of the degradation and enviromental protection of organic mud, it is concluded that organic mud is degradable, providing a new way for the construction of the bored pile wall protection.