2 The compaction quality of chemically improved soil filler shall meet the requirements in the following table.
3. Compaction coefficient K ≥0.92 7d saturated unconfined compressive strength qu(kPa) ≥250 4 Paving, mixing, shaping and rolling of chemically improved soil mixture shall meet the following requirements:
(1) The improved soil filler shall be filled in layers according to the filling compaction thickness determined by the process test, and the specific paving thickness and rolling times shall be controlled according to the parameters determined by the test section and confirmed by the supervisor.
(2) The longitudinal lap length of two working sections shall not be less than 2.0m
(3) The chemically improved soil mixture should not contain clods larger than15mm and undissolved lime particles.
(4) When rolling, the junction of paragraphs shall be compacted by overlapping each other, the longitudinal overlapping length shall be not less than 2.0m, the wheel track overlap between longitudinal rows shall be not less than 40cm, and the filling joints of upper and lower layers shall be staggered by not less than 3.0m.. ..
5. The allowable deviation of the content of chemically improved soil is -0.5% ~+ 1.0% of the test mixture ratio.
The mixture for improving soil by road mixing method should not contain plain soil or plain soil layer.
7. The width of the top surface of subgrade under the subgrade filled with chemically improved soil shall not be less than the design width.