Roadbed continuous compaction quality testing and settlement difference detection "dual control" practice and methods

The continuous compaction quality testing technology of roadbed is disturbed by many external factors, and improving the accuracy of testing is the key link of construction quality control. With the background of a reclaimed soil roadbed project, the test method for continuous compaction quality control of roadbed was formulated, including the compaction testing test section division and the combination of rolling number of passes as well as the "dual-control" process system; the linear relationship between the VCV value and the sand filling method of compaction testing was verified; the GPS elevation data were compared with the sand filling method to determine the compaction level. 22.264, correlation coefficient R=0.8781; through the analysis of variance between GPS elevation data and measured elevation data, the stability of GPS automatic elevation data is determined, and the test data proves that the characterization of roadbed compaction by settlement difference value and VCV detection value has good consistency, and that "dual control" of settlement difference method and VCV value is reasonable. "is reasonable, and gives the 96 area sandwiched with gravel particles of dry stiff clay fill soil roadbed rolling reasonable total number of times for 9 times, VCV reasonable threshold value of 65.30.