海域岛礁地基岩体不良地质现象及精细化勘察
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摘要
以舟山大陆连岛工程西堠门大桥为背景,研究了主塔基老虎山地基岩体缓倾角裂隙、断层、海蚀作用形成的海蚀洞、海蚀缝等不良地质现象及其对桥基稳定性的影响,分析了单孔声波和地震波测试、跨孔声波CT、压水试验、现场大剪试验、数字钻孔摄像等方法在该工程的应用,取得一系列定量的确定的地质结构参数,提出精细化勘察的概念,后期工程施工验证了精细化勘察资料的正确合理性。
Take the Xihoumen Suspension Bridge as a background,study on geology on the main tower foundation(such as gentle angle fractures,faults and marine eroding geomorphology),which is at Laohushan,and on its impact on the stability of bridge foundation.The paper analyzed the possibility of the application of Single-hole velocity test,Single-hole wave velocity test,Cross-hole sound wave CT,Water pressure test,In-situ large scale shear test and Digital borehole imaging to this project,Obtained a series of quantitative and determination parameters of the geological structure,and proposed the concept of refinement investigation.The results showed that refinement investigation was proved correct and rational in the later period of project construction.
Take the Xihoumen Suspension Bridge as a background,study on geology on the main tower foundation(such as gentle angle fractures,faults and marine eroding geomorphology),which is at Laohushan,and on its impact on the stability of bridge foundation.The paper analyzed the possibility of the application of Single-hole velocity test,Single-hole wave velocity test,Cross-hole sound wave CT,Water pressure test,In-situ large scale shear test and Digital borehole imaging to this project,Obtained a series of quantitative and determination parameters of the geological structure,and proposed the concept of refinement investigation.The results showed that refinement investigation was proved correct and rational in the later period of project construction.
引文
[1]林军.海岸线变迁环境地质问题研究[J].地质灾害与环境保护,2006,17(1):29-33.
[2]潘永坚.某跨海大桥主塔位工程边坡稳定性研究[J].工程地质学报,2004,12(4):380-384.
[3]胡卸文.无泥型软弱层带物理力学特性[M].成都:西南交通大学出版社,2002:71-85.
[4]朱杰兵,卢桂臣,等.舟山西堠门跨海大桥基岩工程地质研究[J].人民长江,2005,36(4):25-27.
[5]涂国祥,黄润秋.某水电站坝肩顺向变倾角岩质边坡变形破坏机制研究[J].成都理工大学学报(自然科学版),2005,32(1):278-283.
[6]水利水电工程地质勘察规范(GB50287-99)[S].北京:中国计划出版社,1999.
[7]公路桥涵地基与基础设计规范(JTG D63-2007)[S].北京:人民交通出版社,2007.
[2]潘永坚.某跨海大桥主塔位工程边坡稳定性研究[J].工程地质学报,2004,12(4):380-384.
[3]胡卸文.无泥型软弱层带物理力学特性[M].成都:西南交通大学出版社,2002:71-85.
[4]朱杰兵,卢桂臣,等.舟山西堠门跨海大桥基岩工程地质研究[J].人民长江,2005,36(4):25-27.
[5]涂国祥,黄润秋.某水电站坝肩顺向变倾角岩质边坡变形破坏机制研究[J].成都理工大学学报(自然科学版),2005,32(1):278-283.
[6]水利水电工程地质勘察规范(GB50287-99)[S].北京:中国计划出版社,1999.
[7]公路桥涵地基与基础设计规范(JTG D63-2007)[S].北京:人民交通出版社,2007.
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