Research on the Influence of Design Ultimate State on the Determination and Its Test of Characteristic Values of the Axial Compressive Bearing Capacity of Bridge Foundation Piles
Based on the requirements for the ultimate limit state of bridge foundation piles in Specifications for Design of Foundation of Highway Bridges and Culverts(JTG 3363-2019),the method to determine characteristic values of axial compressive bearing capacity and maximum loading value of bearing capacity tests of piles was studied.Firstly the relationship between the design limit state of piles and its calculated values of the axial bearing capacity characteristic values was analyzed.Secondly,according to the corresponding design limit state of piles,the calculated values of the axial bearing capacity characteristic values of piles were divided into several levels.Then,based on quantity relationship for the maximum loading value of the axial compressive bearing capacity test of a pile and its characteristic values,the principle of determining the characteristic values of the axial bearing capacity of the foundation pile in the preparation stage of the test was proposed according to the type of foundation pile and the purpose of the test.At last the method for determining the characteristic value from the data in testing of axial bearing capacity of foundation piles was improved.Besides,a method for evaluating the compliance of the axial compressive bearing capacity test results with the design requirements of foundation piles was also improved.The practical application shows that the above principles and methods can provide targeted guidance for bearing capacity testing of independent pile testing and engineering pile testing.
万方数据
维普
