FIELD TESTS ON CONSTRUCTING RECTANGULAR COLUMN BY JET GROUTING IMPROVEMENT

Abstract

To reduce the cost of jet grouting, we invented a new technique to construct rectangular-like columns instead of circular columns and set them in a row. This technique reduces the total number of columns, the production time and the production cost. Some field tests were conducted to construct the new columns. We succeeded in constructing the new columns and confirmed that the qualities and the construction efficiencies of the rectangular-like columns are not less than existing columns.