A Study on the Strength of Sediment Deposition in Situ Mixing Ratio - A Case Study of Chih-Pen Creek

Base on the concept of Japan in-situ mixing method (ISM), this study applied the weight ratio method to determine the mixing ratio of cement and Chih-Pen Creek sediment deposition, and explore the impact of the proportion of sand and aggregate, silt content and cement amount on mixing strength. The results showed that in terms of sand-to-aggregate ratio, when S/A ratio under 0.4~0.5, mixing strength is relatively better. When silt content is above 10%, mixing strength distribution is more scattered and there is apparent gap in strength. In terms of cement amount, mixing strength and cement amount are highly correlated. The correlation coefficients of cement amount, S/A ratio, silt content against mixing strength are 0.9812, 0.4145 and 0.3122 respectively. These factors can be the basis for Chih-Pen Creek in situ mixing.