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文章依托国道主干线重庆-南宁-湛江高速公路合浦至山口段中分支出的一个特大型跨海大桥项目,是广西第一座长度近3km的跨海大桥。由于工程规模较大,桥位地形特殊,在勘察时对桥位选择、水文计算、桥位控制测量、桥长确定、地质勘察都有很高的要求,勘察手段方法准确和勘察质量直接影响整个项目的设计和施工。因此,在整个勘察过程中针对桥位区海域砂砾岩和岩溶区的实际情況采用了综合勘察手段,为设计和施工提供基础保障。
Article relying on national trunk road Chongqing - Nanning - Zhanjiang Expressway Hepu to Yamaguchi paragraph branch of a large-scale project of the sea, is the first in Guangxi nearly 3km long span of the bridge. Due to the large scale of the project and the special topography of the bridge site, there are high requirements for the selection of bridge position, hydrological calculation, bridge position control measurement, bridge length determination and geological survey during investigation, and the accurate survey methods and survey quality directly affect the whole Project design and construction. Therefore, during the whole investigation, comprehensive surveying methods were adopted for the actual situation of glutenite and karst area in the bridge area, which provided the basic guarantee for the design and construction.