水泥土搅拌桩及CFG桩在泥炭质土中的应用研究

Research on Application of Cement-soil Mixing Piles and CFG Piles in Peaty Soil

摘要:

水泥土搅拌桩和水泥粉煤灰碎石桩（CFG桩）是道路软土路基处理中常用的2种手段，应用广泛且具有良好效果。在湛江市某道路工程中，以地质勘察资料为基础，根据相关规范设计计算，制定合理的试验方案，进行水泥土搅拌桩、CFG桩的成桩试验，并进行相应的检测，对采用水泥土搅拌桩和CFG桩2种手段进行泥炭质土处理的适用性展开比选。比选结果表明：采用长螺旋钻孔工艺的CFG桩对泥炭质土具有较好的适应性，能够有效改善泥炭质土软基的强度和稳定性，因此是更为合理和可靠的选择。

Abstract:

The cement-soil mixing pile and the cement fly-ash gravel (CFG) pile are two common means for soft soil subgrade treatment in road engineering with the wide application and good effects. In a road construction project in Zhanjiang City, based on the geological survey data and the design calculation of the relevant specifications, a reasonable testing scheme is prepared to conduct the pile finishing test of cement-soil mixing piles and CFG piles, and the corresponding detection is carried out. The applicability of two means using cement-soil mixing pile and CFG pile to treat the peaty soil is compared. The comparison results indicate that CFG pile by using the long auger drilling process has the better adaptability to peaty soil, and can effectively improve the strength and stability of soft peaty soil foundation. Therefore, CFG pile is a more rational and reliable choice.