Comparative Investigations on Internal Force Distribution Characteristics on Concrete Segments in Qiongzhou Strait Sub-Sea Tunnel

摘要

In the design of shield tunnel concrete segments,the calculation of internal forces on segment sections is an important part.In order to study the influence of combining calculation of water and soil pressure and separate calculation of water and soil pressure towards internal forces on segment sections,taking the Qiongzhou Strait sub-sea tunnel as the background,ANSYS software is used to establish the equivalent stiffness circle model,hinged model and beam spring model,and the internal forces on segment are calculated by two methods of combining calculation of water and soil pressure and separate calculation of water and soil pressure.The results show that the difference of the bending moment between the two methods is great while the difference of the axial force is small,the maximum bending moment of combining calculation of water and soil pressure is 2.2-2.9 times larger than that of separate calculation of water and soil pressure,and the axial force is 11%~16% larger than separate calculation of water and soil pressure.