在针对西堠门大桥北塔位（老虎山）岩体深部节理裂隙发育特征的勘察中，采用了钻探、孔内电视、声波CT、压水试验等综合性勘察手段，为大桥北塔位的基础设计及施工提供了准确详细的地质依据，也为今后大型工程深部地基基础的综合勘察提供了宝贵经验。

In the investigation of rock mass's deep joints and fissures' grown feature in Xihoumen Bridge northern tower, some integrated survey technologies like drilling, view in bore, CT, packer permeability test and so on were adopted,which offered the detailed and exact base of Xihoumen Bridge's designing and building, as well as a golden experience for the groundsill basis in major works in future.