浅层真空预压法在加固新吹填粉土及粉质黏土地基中的应用

作者：李卫 白金勇 杨京方 侯晋芳

单位：中交天津港湾工程研究院有限公司港口岩土工程技术交通行业重点实验室天津市港口岩土工程技术重点实验室

关键词：真空预压  间距  沉降  孔隙水压力  粉土

分类号：TU472.33

出版年,卷(期):页码：2010,34(4):12-14

摘要：

对浅层真空预压法加固后的软土地基加固效果进行分析,结果表明,在插板期地表产生较大的沉降,插密板短板可以达到较快加固吹填土层的效果;加固后软土地基土层含水量、孔隙比降低,地基承载力提高,可初步满足建设场地的需要。说明浅层真空预压法对吹填粉土及粉质黏土地基的加固是有效的,浅层真空预压法对于处理有较厚吹填土层的软土地基是比较成功的,可在类似的工程中应用。

This paper analyzes the reinforcement effect of soft soil foundation after using the surface vacuum preloading method;the results show that,the earth's surface appears large settlement when inserting plastic drainage board in it;Insert dense short boards can achieve rapid effect of reinforcing the filling soil.The water content of soft soil foundation and the porosity ratio are reduced,foundation bearing capacity is improved after reinforcement,and the demand of construction site can be satisfied initially.It declares the surface vacuum preloading method is effective for soil reclamation of silt and silty clay foundation.It is analyzed that surface vacuum preloading method to deal with a thick dredge fill was successful,can be used in similar projects.

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参考文献：

[1]陈环.天津软土地基[M].天津:天津科技出版社,1987. [2]孙浩,李卫,曹永华,等.浅层真空预压法施工工艺浅析[J].中国港湾建设,2009(5):10-12. [3]彭劼,刘汉龙.真空-堆载联合预压法软基加固对周围环境的影响[J].岩土工程学报,2002,24(5):657-659.

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