关键词: 饱和软黏土, 现场试验, 套管注浆, 微扰动控制

Abstract: Grouting is a traditional reinforcement method to improve bearing capacity of soft soil and control the compression settlement． However，it has been criticized by engineers for its uncontrollable process and indeterminate reinforcement effect shown by long-standing engineering practice． When grouting is applied to reinforcing the underlying soil of subway tunnel，it needs taking the disturbance during reinforcing process and the long-term effects of grouting into consideration． It is of practical significance to study the effects of grouting parameters on disturbance of saturated soft soil and ultimate reinforcing effect． Therefore，this in-situ test was carried out to obtain reasonable parameters during grouting process．

Key words: saturated soft clay, in-situ experiment, sleeve pipe grouting, small disturbance control ( SDC)