To provide a strength management method for a cement-based improvement body, capable of predicting the strength of the cement-based improvement body with high accuracy.
A strength management method for a soil cement column 1 formed in a ground G includes: a step of forming a hole 2 in the soil cement column in a hardened state at a material age of three days; a step of injecting potassium chloride solution 21 into the hole and inserting an electrically conductive cone 4 in the hole 2 to measure specific resistance; and a step of confirming the strength of the soil cement column on the basis of the specific resistance measured in the hole. Here, a value of specific resistance corresponding to a design reference strength is calculated from the specific resistance measured in the hole at a material age of three days, a uniaxial compression strength at the time point, and the design reference strength, and measurement is continued until the specific resistance of the hole measured by the electrically conductive cone becomes the specific resistance corresponding to the design reference strength or more.
JPS59128583 | [Title of the device] Natural ground state monitor |
WO/2013/052996 | FORMATION PRESSURE SENSING SYSTEM |
FUJII MAMORU
JP2004044328A | 2004-02-12 | |||
JP2011012501A | 2011-01-20 | |||
JP2000046510A | 2000-02-18 |