摘要
某海管隧道穿越地质条件以熔结凝灰岩及花岗闪长岩为主,受次级构造断裂影响,岩体受挤压破碎,形成层间破碎带及岩性接触软弱带等,海域段基岩出露少,且覆盖层较厚,难以反映深部岩体结构面特征。利用超声波成像技术对海域段钻孔进行测试,统计了结构面的特征参数,对深部岩体进行初步定量化分析,对地表露头和岩芯进行校验补充,为海管隧道设计及施工提供有价值的基础数据,进一步优化工程勘察成果的质量。
The geological condition of certain submarine pipeline tunnel is mainly welded tuff and granodiorite.The rock mass were crushed to form an interlayer fracture zone and weakened lithologic contact zone by the affect of secondary tectonic fracture.It's difficult to reflect the characteristics of the deep structural plane because of the thick overburden and less bedrock exposure.However,with the testing of ultrasonic imaging technology,it can clear ly calculate the characteristic parameters of structural plane, preliminary quantitative analysis the deep rock mass,check and supplement the exposure and core.Also it can provide the valuable basic datas for the design and construction department of submarine pipeline tunnel and optimize the quality of engineering investigation results.
引文
[1]史永跃,尚彦军,孙元春等.超声波成像钻孔电视在工程勘察中的应用[J].工程勘察,2010,(8):82-92.
[2]潘和平,马火林,蔡柏林等.地球物理测井与井中物探[M].北京:科学出版社,2009.