Research on Construction Technology and Detection Method of Stone Filled Subgrade Based on 36 t Roller
Based on the 36 t roller,the numerical simulation analysis of the rock-filled roadbed and the field test is carried out.Four groups of working conditions,two kinds of loose paving thickness and five kinds of detection indexes are selected to study the rapid construction technology and detection method of the super-thick layer of the rock-filled roadbed.The results show that the stress generated by the vibration load of the 36 t roller is larger within 0.9 m in depth under the rock-filled subgrade surface;the 36t roller has the best compaction effect by static pressure once,strong vibration rolling twice,weak vibration rolling twice and static pressure once.The loose paving thickness of 85 cm is the optimal loose paving thickness matching the construction technology.The dynamic deformation modulus has high detection efficiency and good correlation with porosity.It is recommended to use dy-namic deformation modulus as the detection index of rock-filled subgrade,and the dynamic deforma-tion modulus index of embankment under soft rock-filled subgrade is recommended to be controlled a-bove 69 MPa.
stone filled subgradefinite element method36 t rollerconstruction technologyloose paving thicknesscontrol index
NETL
NSTL
万方数据
