CJ/T327—2010 modular graphite cast iron composite resin well lid loading pressure and dynamic fatige
JC/T1009—2006 glass fiber reinforced plastic composite well lid loading pressure and dynamic fatige
JAW—1000KN /200KN dynamic fatige functional testing machine for well lid: pioneer of China.(satisfied Europen standards)
Dynamic testing, with loading, displacement, strain calculation function and varity of controlling mode, loading is equal or greater than 500 KN, put standard triangle changing wave load at rate of 0.2Hz and 70KN peak vaule on well lid. After carried out 1000—1500000 times fatige cycling test, place indoor for 24h.
Testing result is expressed by relative changing rate of damaging load.
After fatige cycling test, falling of damaging load of well lid is less than 5%. If there is stoping accidently In the process of fatige circling testing, stoping time should be less than 5min, times of stoping should be less than 3 times in every testing of well lid, or else replace new one.
CJ/T211—2005 polymer matrix composites well lid, residual deformation of well lid is (1/500)D, when testing load reaches specified keeping for 5min, then unload it. Well lid and seat should not be cracked.
Measuring devicefor residual deformation: automatic collecting and calculating, statisfied Europen standard BSEN124:1994.
GB/T23858—2009 Manhole cover testing of residual deformation:puting one elastic rubber shim between rigid heel block and well lid , dimension of shim is same to rigid heel block, the thickness of shim is 6mm—10mm. 1 measuring and inspecting initial value of well lid geometrical center position before loading, precision is 0.01mm. 2 loading at the speed of 1KN/s-5KN/s until reaching two—thirds of test loading, then unloading. Repeating the process for 5 times, recording the final value of geometrical center. 3 calculating residual deformation according initial value and final value, 4 measuring device of residual deformation: automatic collecting and calculating, statisfied Europen standard BSEN124:1994.
JC/T1009—2006 glass fabric strengthen plastic complex manhole cover, dynamic pressing fatige testing machine: test loading lower limit is 40KN, upper limit is 150KN, it is a circle from lower to upper limit, frequency is 6Hz---10Hz, inspecting seat and well lid cracked or not after 200 ten thousand times fatige circling testing.
GB26357---2011 steel fibre reforced concrete manhole cover, pressing testing :well lid pressing is mandatory, it devided into 6 grades A15, B125, C250, D400, E600, F900 according pressing ability. Destruction loading of well lid are equal or greater than 15KN, 125KN, 25OKN, 400KN, E600KN, 900KN. Recommending 1000KN pressing testing machine for well lid (satisfied Enroupen standard). Automatic completing: examining loading capacity, rupture loading, destruction loading, residual deformation.