双向荷载作用下层状岩体变形模量参数取值试验研究
Experimental study on the parameter values of deformation modulus of lower layer rock mass under bidirectional loading
罗伟斌 1陈美村2
作者信息
- 1. 广西交通设计集团有限公司,广西 南宁 510012;广西交通工程检测有限公司,广西 南宁 530299;中国地质大学(武汉),湖北 武汉 430074
- 2. 广西交通设计集团有限公司,广西 南宁 510012;广西交通工程检测有限公司,广西 南宁 530299
- 折叠
摘要
在龙滩特大桥拱座基础中,针对层状强风化—中风化粉砂质泥岩,采用刚性承载板法进行拱座受垂向荷载及水平荷载作用下,层面倾角为38°～40°的岩体变形模量试验.结果表明:拱座基底受垂向荷载的变形模量为0.454 2 GPa～0.832 9 GPa,拱座受水平荷载的变形模量为0.066 GPa～0.088 GPa.研究深入分析了层状岩体的变形机制和规律,揭示了不同加载条件下的变形规律,提出了确定垂直和水平方向变形模量在综合模量中的权重比例的方法.该研究对层状岩体变形特性和大跨度拱桥的理论计算具有重要参考价值.
Abstract
In the foundation of the Longtan Grand Bridge arch,a rigid bearing plate method was used to conduct deforma-tion modulus tests on rock masses with a dip angle of 38°～40° under vertical and horizontal loads on the arch,targeting layered strongly weathered to moderately weathered sandy mudstone.The results show that the deformation modulus of the arch base under vertical load is 0.454 2 GPa～0.832 9 GPa,and the deformation modulus of the arch base under horizon-tal load is 0.066 GPa～0.088 GPa.The study deeply analyzed the deformation mechanism and laws of layered rock mas-ses,revealed the deformation laws under different loading conditions,and proposed a method to determine the weight ratio of vertical and horizontal deformation moduli in the comprehensive modulus.This study has important reference value for the deformation characteristics of layered rock masses and the theoretical calculation of large-span arch bridges.
关键词
大跨度拱桥/刚性承载板法/变形模量/层状岩体Key words
large span arch bridge/rigid bearing plate method/deformation modulus/layered rock mass引用本文复制引用
出版年
2025
NETL
NSTL
万方数据