摘要
针对淮北平原新近沉积层土质变化大、普遍发育钙质结核等地质特征,依托在建高速公路开展大量的动态平板载荷试验,统计分析不同土体动态变形模量E vd的值域范围和变化规律,探讨淮北平原不同地质区域E vd的分布特征。在此基础上,通过静力触探、螺旋板载荷和平板载荷对比试验,建立动态变形模量E vd与比贯入阻力、地基承载力的相关关系式。研究表明,动态平板载荷试验作为一种便捷快速的原位检测方法,测试值E vd能很好地反映原地基土体力学特性和变化规律,与比贯入阻力ps值、地基承载力具有较好的相关性,可在高速公路工程中作为地基承载力测定指标加以推广应用。
According to geological characteristics of recently sedimentary layer in Huaibei plain, such as existence of different soil and calcareous concretions, a large number of dynamic plate loading tests are carried out relying on highways under construction. The range and variation of dynamic deformation modulus Evd are analyzed for different soils, and distribution characteristics of E^d are discussed for different geological area in Huaibei plain. On this basis, relationships between the Evd and penetration resistance, bearing capacity of foundation are established through static cone penetration tests, screw plate tests and plate loading tests. Studies show that, dynamic plate loading test is a fast and convenient in situ test, and mechanics characteristics and regularity of foundation soil can be reflected well by Evd, which has good relativity with penetration resistance of Ps value and bearing capacity of the foundation. Evd can be used in highway engineering as a foundation bearing capacity determination index.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2013年第A01期2723-2729,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
动态平板载荷试验
动态变形模量
地基承载力
相关关系
soil mechanics
dynamic plate loading test
dynamic deformation modulus
bearing capacity of foundation
correlation
