To discuss the influence by the constraint of surrounding soil on the buckling stability of cast-in-situ rock-socketed piles with highrise pile cap

the most general exponential distribution of subgrade reaction modulus was assumed and the total potential energy equation of the pile-soil system was set up based on the simplified elastic beam model. Then

analytical solutions for the buckling length and buckling load of the pile shaft were deduced by applying the principle of minimum potential energy. And based on the obtained solutions

influencing rules by the distribution mode of subgrade reaction modulus

deadweight and side resistance along the pile shaft on the buckling behavior of cast-in-situ rock-socketed piles with highrise pile cap were discussed and obtained respectively in detail. Application of the present method to an engineering example shows that

more reasonable buckling analysis results of the pile shaft may be obtained when the distribution of subgrade reaction modulus is characterized by an exponential function.