摘要
在高速公路沉降计算中 ,有限元法虽能同时考虑土体侧向变形和流变对沉降的影响 ,但运算较繁琐 ,难以被一般工程技术人员掌握。在有限元计算的基础上 ,得出了一个沉降计算综合修正式 ,它使得单向e -lgp法得出的主固结沉降修正后可考虑土体侧向变形 ;并且 ,基于次压缩与荷载相关事实 ,建议在次压缩计算中采用绝对时间坐标系 ,并对传统的次压缩计算公式进行了修正。把这两方面综合到高速公路沉降的e -lgp法计算中 ,使得一维法可以同时考虑侧向变形与流变。实例计算表明 ,按此思路计算结果精度高、易于掌握 。
Finite element method can consider not only soil lateral deformation but also rheology during settlement calculation of highway, but the course is more numerous and not easily mastered by common engineering technicians. With a lot of nonlinear finite element method calculations, one settlement general modification formula is brought out, which may cause the e-lgp method to consider lateral deformation, then, based on the fact of secondary compression related to loadings, the absolute time coordinate system is suggested for secondary compression calculation, by the traditional secondary compression calculation formula is rectified. Thus, during the 1-D settlement calculation of highway, the thing that in consideration of rheology and lateral deformation can become reality when combined the above two sides. This thought can cause more accurate results and can be lightly mastered, so it has definite using value in practical engineering.
出处
《工业建筑》
CSCD
北大核心
2004年第10期36-39,共4页
Industrial Construction
