When calculating characteristic curve and putting line curve of HV transmission lines, the maximum working stress σ M of conductor is usually determined according to the "experience method", which has a lot of weakness.

Combined with the project examples,it introduces the construction methods of basic mass concrete,gets the calculation to the temperature of mass concrete,foundation restraint coefficient,shrink,maximum stress and the anti-crack coefficient,and puts forward the steps of assuring the not crack of concrete,this will assure the project quality of mass concrete.

It has found out these members dangerous position with the maximum stress and calculated the stress value, made the goal and the range of daily check more definite and concentric, provided the theory basis for establishing reasonable particle check system.

The stress accumulating region and the maximum stress is calculated through cosmosm statics analysis program.

The solutions considering pre-loads of maximal stresses and their positions are obtained in the cases of different initial values or amplitudes of shock excitations on the upper or the base rigid retainer, and strength of springs is analysed at last.

Analysis on maximal stresses and strength of a long cylindrical shell with multi-openings;