摘要
土岩混合体是由土体与不规则岩块混合形成的一种特殊地质介质,在山区广泛分布,对山区道路、隧道等工程建设影响较大。由于其特殊性,其力学性质不易查明,从而影响对其进行准确评价,由此可能造成工程成本的浪费或处理不当带来工程安全隐患等问题。结合兴延高速公路梯子峪隧道工程中一处典型的土岩混合体,进行了3组原位水平推剪试验及2组室内直剪试验,揭示了这类非均质、非均匀性的复杂地质介质的力学特性,通过对比原位试验及室内试验成果,综合分析、评价本工程中的土岩混合体的抗剪强度指标,充分体现了原位测试工作在解决实际工程问题中的必要性。
The soil rock mixture is a kind of special geological medium formed by soil mixed with irregular rocks,widely distributed in the mountains and had a greater influence to the road and tunnel engineering construction in mountainous area.Because of its particularity,its mechanical property is not easy to find out,which affect on the accurate evaluation,it may cause the waste of engineering cost or improper handling to cause the potential risk of the project.This paper combined with a typical soil rock mixture in TiZi tunnel project of XingYan highway,conducted three groups level shear test in-situ and two groups direct shear test,revealed the mechanical properties of this heterogeneity,inhomogeneous geological medium,by comparing with the in-situ test and laboratory test results,comprehensive analysed and evaluated the Shear strength index of the soil rock mixture,fully emboding the necessity of the in-situ testing work in solving the practical engineering problems.
出处
《岩土工程技术》
2017年第2期86-90,共5页
Geotechnical Engineering Technique
关键词
土岩混合体
力学特性
水平推剪试验
直剪试验
soil rock mixture
mechanical properties
level shear test
direct shear test
