基于结构与填土相互作用的涵管内力影响参数分析

涵管周围土体的应力状态与半无限大均质弹性土中的应力状态不同,由于涵管与周围填土的相互作用,管周存在不同程度的土压力集中现象。因此,考虑涵管与土相互作用的结构分析方法,更能反映涵管的实际受力状态。论证了这种方法的合理性,在此基础上,通过涵管内力影响参数的分析,研究涵管与填土的相互作用特性。结果表明,涵管内力随周围填土变形模量与涵管刚度比值E/E1 I的增大而减小;通过涵管结构与土的相互作用分析,对涵管刚度以及填土土性和密实度等内力影响因素进行综合设计,可以创造条件改善涵管的受力状况。

Structural Analysis Considering Soil-Conduit Interaction

The stress behavior in soil-conduit system differs greatly from that in elastic halfspace homogeneous earth,around conduit exist various earth pressure concentration due to the soil-structure interaction.Consequently,structural design considering the soil-structure interaction is more reasonable and effective compared with the current methods in exhibiting the mechanical performances of the buried structure.A further discussion about this method has been carried out in this paper,and the interaction performances of the buried structure and their influences on the internal force of the conduit also investigated.The results indicate that with the increasing of the soil elastic modulus E/the conduit stiffness E1I,the moment of conduit reduces;according to this performance a comprehensive design including the conduit stiffness,the fill compactness and the soil constituent will improve the mechanical situations of conduit.The conclusions in the paper will benefit design and construction.