Through the analysis of the sliding failure form of soil mass under the bearing push-extend reamed of Push-extend Multi-under-reamed Pile, in the paper, the law of coulomb-Mohr is used to establish a stress function and the theory of the sliding line is used to establish Prandtl regional stress field, which determines the stress calculating mode of soil mass and provides a theoretical basis for a further study of this type of pile ultimate bearing capacity of soil mass.
 Qian, Y.M., Wang, R.Z. and Yin, X.S. (2012) The Simulated Analysis in the Computer on the Effect of Pile and Soil Working Together about the Push-Extend Multi-under-Reamed Pile. Advanced Material Research, 479-481, 59-64.
 Qian, Y.M., Wang, R.Z. and Yin, X.S. (2011) Testing Study on the Shape of the Bearing Push-extend Reamed Affecting the Bearing Capability of the Pile. Architecture Technology, 42, 143-145. (in Chinese)