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上海地区软土次固结系数的变化特征及影响因素

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预测软土地基次固结沉降,取上海祁连山南路地铁站地层土样进行三轴压缩固结试验,分析次固结系数的变化特征并探究各个影响因素对次固结系数的影响,主要对不同土性指标、不同载荷条件次固结系数变化特征进行试验研究。结果表明:次固结系数会随着土性指标的变化而变化,其影响力不会随载荷的变化而减弱,表明土性指标对次固结系数影响起主导作用;次固结系数也会随载荷条件的变化而变化,但这种影响与土层所在的位置有关,对于深部土层以及压缩性较低的土层这种影响可以忽略不计,载荷因素对次固结系数影响起辅助作用。
Variation characteristics and influencing factors of soft soil’s coefficient of secondary consolidation in Shanghai area
In order to predict soft soil’s secondary consolidation settlement, this study takes the soil samples at South Qilianshan subway station to conduct triaxial apparatus test and analyzes the variation features and several influencing factors of the coefficients of secondary consolidation. The study investigates how distinct soil indicators and load conditions influence the coefficients. The result shows that different soil indicators lead to different coefficients regardless load conditions. Therefore, the soil indicator playes a leading role in the influence on the coefficients of secondary cosolidation. Furthermore, different load conditions can also generate different coefficients, however, this impact has a relationship with the locations of soil layers. For deep layers and lower compressibility layers, this impact may be ignored. Therefore, it concludes that the load factor takes a supplimentary role.

coefficient of secondary consolidationtriaxial apparatussoil indicatorload factorsoft soilvariation featuresinfluencing factorsShanghai area

吴治厚、王建秀、吴江斌

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同济大学 土木工程学院,上海 200092

同济大学 岩土及地下工程教育部重点实验室,上海 200092

华东建筑设计研究院有限公司,上海 200002

次固结系数 三轴试验 土性指标 载荷因素 软土 变化特征 影响因素 上海地区

41072205

2013

辽宁工程技术大学学报(自然科学版)
辽宁工程技术大学

辽宁工程技术大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.722
ISSN:1008-0562
年,卷(期):2013.(1)
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