曹妃甸滨岸带砂土液化分布特征研究

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英文篇名：Study on distribution characteristics of sand liquefaction in the Caofeidian coastal zone 作者：柳富田 ; 方成 ; 杜东 ; 秦雅飞 ; 孟利山 英文作者：LIU Fu-tian;FANG Cheng;DU Dong;QIN Ya-fei;MENG Li-Shan;Tianjin center,china geological survey;North China Center for Geoscience Innovation Precambrian Research Centre,China Geological Survey;Key Laboratory of Muddy Coast Geo-Environment,China Geological Survey; 关键词：砂土液化 ; 分布特征 ; 曹妃甸滨岸带 英文关键词：sand liquefaction;;distribution characteristic;;Caofeidian riparian zone 中文刊名：QHWJ 英文刊名：Geological Survey and Research 机构：中国地质调查局天津地质调查中心;华北地质科技创新中心;中国地质调查局泥质海岸带地质环境重点实验室; 出版日期：2019-03-15 出版单位：地质调查与研究 年：2019 期：v.42;No.165 基金：河北曹妃甸滨海地区海岸带环境地质调查评价(212010814005、1212011120086);; 京津唐张交通廊道规划建设区1/5万环境地质调查(DD20160233) 语种：中文; 页：QHWJ201901006 页数：4 CN：01 ISSN：12-1353/P 分类号：47-50

摘要

本研究依据《建筑抗震设计规范》(GB50011-2010),利用标准贯入试验对研究区内分布18个钻孔的粉砂、粉土、细砂进行液化判别。其中,非液化区面积共计338.15 km~2,占20.98%;轻微液化区面积为239.34 km~2,占14.85%;中等液化区面积为581.41km~2,占36.07%;严重液化区共分布于5处区域,总面积为453.15 km~2,占28.11%。液化区合计占研究区79.02%。根据砂土液化治理效果、经济效益分析,可以采用置换法、预压堆载、强夯法和深层搅拌化学固结等方法处理砂土液化。对于埋深较深的砂土液化层来说,通过振动挤密碎石桩和爆炸压密法,效果更好。
        According to the Code for Seismic Design of Buildings(GB50011-2010), the liquefaction of silt, silt and fine sand with 18 boreholes distributed in the study area was discriminated by standard penetration test. The area of non-liquefied zone was 338.15 km~2, accounting for 20.98%; the area of light liquefied zone was 239.34 km~2, accounting for 14.85%; the area of medium liquefied zone was 581.41 km~2, accounting for 36.07%; the area of severe liquefied zone distributed in five areas, with a total area of 453.15 km~2, accounting for 28.11%. The total liquefaction area accounts for 79.02% of the study area. According to the effect of sand liquefaction treatment and economic benefit analysis, replacement method, preloading surcharge method, dynamic compaction method and deep mixing chemical consolidation method can be used to treat sand liquefaction. For deep buried liquefaction layer of sand, vibration compaction gravel pile and explosive compaction method should have better effect.

引文

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