舟山地区工程勘察中的若干问题及对策
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摘要
舟山地区为海岛丘陵区,具有地貌类型多、变化较迅速、岩土层类型较复杂、岩相和岩性及厚度变化大的工程地质特点。针对本区工程勘察中常见的不同风化程度岩石区分、孤石与基岩判别、第四系之下基岩顶面异常起伏、持力层之中存在软弱夹层等工程地质问题,应加强现场观察调查,采用钻探配合工程物探方法 (电法、浅地震法、声波勘察)及静力触探等原位测试,并适当增加勘察钻孔与取样数量。
Zhoushan region is the island hilly area where is characterized by many physiognomy types which change rapidly.There are the complex geotechnical layer types and great diversity in the lithofacies,lithology and thickness.In order to deal with the common problems in geotechnical investigation such as the classification of different weathering levels of rock,the discrimination between boulder and bedrock,the abnormal fluctuation of the upper surface of bedrock beneath quaternary system and the weak intercalated layer in the bearing strata,the suitable solutions such as strengthening observation and investigation on site,the drilling combined with geophysical methods(electrical,shallow seismic method,acoustic survey),in-situ static penetration tests,and the proper increase of the drilling holes and sampling number are proposed.
Zhoushan region is the island hilly area where is characterized by many physiognomy types which change rapidly.There are the complex geotechnical layer types and great diversity in the lithofacies,lithology and thickness.In order to deal with the common problems in geotechnical investigation such as the classification of different weathering levels of rock,the discrimination between boulder and bedrock,the abnormal fluctuation of the upper surface of bedrock beneath quaternary system and the weak intercalated layer in the bearing strata,the suitable solutions such as strengthening observation and investigation on site,the drilling combined with geophysical methods(electrical,shallow seismic method,acoustic survey),in-situ static penetration tests,and the proper increase of the drilling holes and sampling number are proposed.
引文
[1]林宗元.岩土工程勘察设计手册[M].沈阳:辽宁科学技术出版社,1996,7～15.
[2]张根寿.现代地貌学[M].北京:科学出版社,2005,271～274.
[3]刘代志.构造—地貌反差强度初探[J].大地构造与成矿学,1988,12(3):77～86.
[4]邵长云,钟庆华,葛双成等.利用岩体波速定量划分岩体风化程度的试验[J].工程勘察,2012,(3):87～95.
[5]涂荫玖,李国光,季志永等.舟山东港桩基质量问题及其与工程地质条件关系的分析[J].浙江建筑,2012,29(11):18～22.
[6]朱志澄.构造地质学[M].武汉:中国地质大学出版社,1999(第2版),128～142.
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[8]郑红波,邢玉清.地震横波与联合剖面法在城市地质调查中的综合应用[J].工程勘察,2011,(12):72～76.
[9]祝杰,杜毅,元会明等.高密度电法在水域工程勘察中的应用[J].工程勘察,2011,(10):80-83.
[2]张根寿.现代地貌学[M].北京:科学出版社,2005,271～274.
[3]刘代志.构造—地貌反差强度初探[J].大地构造与成矿学,1988,12(3):77～86.
[4]邵长云,钟庆华,葛双成等.利用岩体波速定量划分岩体风化程度的试验[J].工程勘察,2012,(3):87～95.
[5]涂荫玖,李国光,季志永等.舟山东港桩基质量问题及其与工程地质条件关系的分析[J].浙江建筑,2012,29(11):18～22.
[6]朱志澄.构造地质学[M].武汉:中国地质大学出版社,1999(第2版),128～142.
[7]《工程地质手册》编委会,工程地质手册(第4版)[M].北京:中国建筑工业出版社,2007,519～520.
[8]郑红波,邢玉清.地震横波与联合剖面法在城市地质调查中的综合应用[J].工程勘察,2011,(12):72～76.
[9]祝杰,杜毅,元会明等.高密度电法在水域工程勘察中的应用[J].工程勘察,2011,(10):80-83.
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