Dual Response Surface Methodology for the Robust Design of Continuous Compaction Measurement Value

Abstract

Robust design of continuous compaction measurement value aims at selecting the best combination of control factors in order to reduce the sensitivity to noise factors, so that the accuracy of the continuous compaction control can be improved. Based on the dual response surface methodology, mean and variance of the compaction meter value (CMV) are used as the optimization objective to develop a second-order polynomial model. Using the Box-Behnken design, continuous compaction control tests are carried out for three factors and three elevation levels at Zhijiang construction site of Shang Hai-Kun Ming High-Speed Railway. The three factors are vibration amplitude, excitation frequency and roller speed. The results show that the degree of stability on the CMV is given by: excitation frequency > amplitude > roller speed. Due to the “smaller-the-better” characteristic of the CMV, the best combination of technical parameters for the vibratory roller is: excitation frequency=28.0 Hz, roller speed=4.0 km/h, and vibration amplitude=1.10 mm. Finally, the field test verifies the applicability and the accuracy of this combination of technical parameters.