| 摘要 |
PROBLEM TO BE SOLVED: To suppress costs and enhance reliability of a ground injection method.SOLUTION: In the design method, a virtual form into which a suspension type improvement material penetrates is set (S10), and an advective-dispersive equation corresponding to the virtual form is established that includes an adsorption amount of the suspension type improvement material (S20). Then, a one-dimensional injection test (S50 or S110) and a uniaxial compression test (S60 or S120) are performed to obtain a distribution coefficient of a ground to be worked (S100 or S130) and a relation between a solid component mass and uniaxial compression strength (S80 or S140) based on the test result, and a delay coefficient is calculated using the distribution coefficient (S150). Then, predicted distribution of the solid component is derived by solving the advective-dispersive equation (S160), and furthermore predicted distribution of the uniaxial compression strength is derived (S170). Then, a size of an improvement body offering strength greater than a prescribed strength is derived from the predicted distribution of the uniaxial compression strength (S180). The method allows concentration and an injected amount of the suspension type improvement material used with a ground injection method to be set appropriately, thereby suppressing costs and enhancing reliability of the ground injection method.SELECTED DRAWING: Figure 1 |
