珊瑚混合土地基承载力特性评价

Bearing Capacity of Coral Mixed Soil Foundation Characteristic Evaluation

"一带一路"战略的实施,工程建设将越来越多的涉及到珊瑚砂地基,而国内有关勘察地基设计规范中,尚未列出珊瑚礁类岩土,国内外学者对珊瑚砂地基特性特别是地基承载力的现场试验研究也不多。珊瑚礁经人工扰动后,形成粗细粒土混杂的混合土地基,珊瑚混合土地基工程特性的评价没有可供借鉴的实例和资料。通过现场载荷板试验与动力触探的对比分析,得到了荷载板合理影响深度,动探击数与珊瑚混合土地基承载力具有良好的相关性,并通过分析得到动探击数与地基承载力、动探击数与变形模量的经验公式,对类似工程及科研具有一定的参考价值。

The coral sand foundation implementation will be more and more involved in the Belt and Road project construction. But the relevant domestic survey foundation design specification has not yet listed coral reef types of geotechnical. Domestic and foreign scholars does not study much on the coral sand foundation characteristic especially the bearing capacity of foundation soil field test. Coral reefs become a mixed soil mixture of coarse grained soil after artificial disturbance,while there is no engineering instance can be used for reference and information for coral mixed soil. Through field loading plate test and dynamic contrast analysis,the reasonable loading plate impact depth was got. Dynamic agent number and coral hybrid bearing capacity of soil foundation has good correlation. The experience formula of dynamic agent number and foundation bearing capacity,dynamic agent number and deformation modulus were got through analysis. The research has certain reference value to similar projects.