马累-机场岛跨海大桥建设场地工程地质特性及评价

Engineering Geological Characteristic and Evaluation for Construction Site of Cross-sea Bridge in Male-Airport island

通过采用钻探取样、岩土试验、原位测试、物探、地质调查等多种手段,对马累-机场岛跨海大桥建设场地的工程地质特性展开研究及评价。查明了大桥建设场地的地形地貌和地质构造特征,获得了以松散珊瑚混砂、礁灰岩为主的地层特点,对礁灰岩的物理力学特性开展了试验分析,掌握了其物理力学特性。结合岩土层工程性质、不良地质作用、场区稳定性,对大桥建设场地的工程地质进行了适宜性评价。研究结论,揭示了珊瑚礁岩土的工程地质特性,为今后同类工程建设能提供有益的借鉴。

In this paper, the sampling drilling, geotechnical testing, in situ testing, geophysical prospecting, geological survey, and other means have been used to reveal the engineering geological characteristic and evaluation for construction site of cross-sea bridge in Male-Airport island. By that, we find out the construction of the bridge site topography and geological structure features. Won a loosely coral sand, reef limestone strata characteristics. The physical and mechanical characteristics of reef limestone was carried out by test analysis,mastered the physical and mechanical characteristics. Finally, combining with the engineering properties of rock and soil layer, bad geological effect and stability in jobsite, the bridge construction site engineering geological suitability is evaluated. Research conclusion reveals the coral reefs in geotechnical engineering geological properties, can provide beneficial reference for the future similar projects construction.