Abstract:

Through the analysis of elementary calculation theory and internal force calculation of reinforced concrete cover plate，the steps and contents of the calculation are introduced in detail according to the calculation parameters and the characteristics of the 300 loads. The examples are given to show a method of determining the bearing capacity of a common graph. General diagram calculation of large amounts of data and comparative analysis of calculation shows: using different span，different culvert，a different filling height，different load，the calculation of the control load is different when calculation of culvert is under—300 loads. If calculation of the culvert size is done using the trailer—300 loads，the calculated results will not meet safe passage of less than 300 trailer loads. Moreover，the load effect of the large aperture culvert cover is very large. In the reinforced concrete cover culvert general map (load: Highway-II special loading Trailer-300; oblique angle: 0 degrees)，the calculation of top filling height of 4.00 m culvert is limited to the range of 0.5~6.0 m. It should be used in the selection according to conditions on the ground.

Key words:  culvert, general-purpose drawing, calculation