| 摘要: |
| 本文基于小凌河、大凌河、双台子河、大辽河附近的钻孔资料,分析了四条河流附近的沉积物组成以及工程地质特征。结果表明,辽河三角洲地区沉积物以为粉土、粘土和砂土为主,在小凌河地区14m以下地层出现了厚度达16m的砾石层；辽河三角洲小凌河和大凌河地区浅部地层有一层不足1m的淤泥层,工程性质较差,除淤泥层外,其它地层含水量一般不超过30%,以中低压缩性土为主；辽河三角洲地区的承载力特征随着深度的增加而增大,在桩径为1200mm,壁厚24.0mm的钢管桩条件下,辽河三角洲地区单桩极限承载力的最大值均可达到9000kN,但在淤泥层、粉质粘土和粘土层的承载力出现急剧减少的现象,在工程建设中应根据实际情况选择合适的持力层。研究成果对该地区的陆地工程建设和防灾减灾具有重要的指导意义。 |
| 关键词: 辽河三角洲 沉积物 工程地质特征 单桩极限承载力 |
| DOI：10.11759/hykx20170117005 |
| 分类号:P753 |
| 基金项目:中国地质调查局项目(GZH201200503) |
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| The Variance Analysis of Liaohe Delta Sediment Engineering Geological Characteristics in the Liaohe River |
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Jiang Jianxin1, Deng Xigui2, Feng Xiuli1, Jiang Bo1, Teng Shan1, Tian Donghui1, Wang Xiaoming1
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1.Ocean University of China;2.Qingdao Institute of Marine Geology
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| Abstract: |
| This article is based on the borehole data of Xiao Ling River, Da Ling River, Shuang Taizi River and Da Liao River, analyzes the sediment components and the engineering geological characteristics around these four rivers. The results showed that, the main sediments in the Liao River delta area are silt, clay and sand, in the Xiao Ling River region 14 metres below the stratums appear 16m in thickness layer of gravel layer. There is a layer of silt layer of 1m in the shallow stratums of Xiao Ling River and Da Ling River areas , their engineering properties are poor, apart from the silt layer, the water content of other layers are generally not more than 30%, mainly in the low and medium compressible soil. Subgrade bearing capacity in Liao River delta increases with the increase of depth, under the condition that the pile diameter is 1200mm and the wall thickness is 24.0mm, the maximum ultimate bearing capacity of single pile can reach 9000kN, but the bearing capacity in silt layer, silty clay and clay layer is reduced sharply, so we should select the appropriate bearing layer according to the actual situation. The research results have important guiding significance to the land construction and disaster prevention and mitigation. |
| Key words: Liaohe Delta, Sediment, Engineering Geological Characteristics, ultimate bearing capacity of single pile |