Railway subgrade engineering supervision Implementation Rules
1. Before construction: check the resurvey results, check the geotechnical test report, approve the construction team, approve the construction scheme of the subgrade test section, etc... 2. During construction: check the foundation treatment, filler type, filler water content, filler thickness, filler particle size, rolling equipment, density and porosity, detection of foundation coefficient, subgrade transition section, reserved settlement Observation data of soft soil subgrade, etc. 3. After construction: inspection of subgrade surface flatness, subgrade surface width, elevation, crown, connection of transition section, slope protection facilities, etc. 2.4.2. Control objectives and monitoring means of supervision work: