某高速公路湿陷性黄土路基沉陷病害旋喷桩处治技术研究

The Technical Research on Collapsible Losses Subgrade Settlement Treated by Jet Grouting Pile for an Expressway

通过详细介绍某高速公路湿陷性黄土路基沉陷病害的特征,选取典型沉陷段作为试验研究对象,结合研究区工程地质特点,选取合适的施工工艺参数,制定质量控制措施,利用高压旋喷桩技术加固湿陷性黄土路基。对旋喷桩成桩效果进行检验,发现桩体质量符合要求;处治后沉降量监测数据显示,一段时间后路基趋于稳定,说明高压旋喷桩技术能够很好地应用在研究区路基沉陷病害处治中。

Through detailed introduction to the characteristics of collapsible losses subgrade settlement of an expressway, this paper took the typical settlement section as the experimental research object, and utilized the high-pressure jet grouting pile technique to reinforce collapsible loess subgrade by incorporating engineering geological characteristics in the research area, selecting proper construction technological parameters and formulating quality control measures. The pile-forming effect of jet grouting pile was inspected, which found that the pile quality met the requirements. The monitoring data of settling volume after treatment revealed that the subgrade tended to be stable after a period of time, which meant that the jet grouting pile technique could be applied in the treatment of subgrade settlement defect in the research area.