On method of bearing capacity of soft rock ground based on in-situ load test

This paper explores fives methods of bearing capacity of soft rock ground based on in-situ load test. namely, point of contraflexure method, relative settlement method, rebound method based on elastoplasticity theory, hyperbola fitting method and minimum curvature radius method. The suitability of five methods was discussed here, taking the typical results from in-situ load test of Renshou mansion and Caifu plaza in Yueyang for example. It shows that bearing capacity can be obtained by the proportion load and limit load from p-s curve with first and second point of contraflexure easily. The accurate value of bearing capacity can be obtained by hyperbola fitting method and minimum curvature radius method theoretically, so it is recommended. The rebound method is clear in principle, in which the elastoplasticity characteristic is thought about, and it is recommended, too. Out of consideration for the unsteadiness and unobviousness of bearing capacity from relative settlement method, it can be only adopted as reference. So bearing capacity of soft rock ground should be determined by weathering condition of soft rock and curve type.