This standard specifies three test methods for compressive instability under the combined forces of soil and groundwater after installation of thermoplastic inspection well bases: air method, sandbox method and water tank method. This standard is applicable to the compression instability test of the thermoplastic inspection well seat.
GB/T 39395-2020 Referenced Document
CJJ 3 Standards for quality inspection and evaluation of municipal drainage pipes and channels
GB/T 18042 Thermoplastics pipes-Determination of creep ratio
GB/T 19278 General terms and their definitions of thermoplastic pipes, fittings and valves
GB/T 39395-2020 history
2020GB/T 39395-2020 Test method for buckling resistance of the thermoplastics inspection chamber bases