盐城滩涂固化土强度特性试验研究

Experimental study on strength characteristics of solidified soil in Yancheng beach

盐城滩涂面积广袤,并且每年淤积大量淤泥,有着丰富的滩涂资源。将滩涂淤泥固化处理后,用于各类填土工程,具有重要意义。本文开展了盐城滩涂固化土强度特性研究,通过无侧限抗压试验,分析了水泥掺量、含水率、龄期等因素对盐城滩涂固化土强度特性的影响。研究结果表明:盐城滩涂固化土的抗压强度随水泥掺量和养护龄期的增加而增加,随土样含水率的增加而降低,强度增长主要发生在28 d前,达到90 d强度的85%;E50与抗压强度之间呈线性变化关系,通过数据拟合,获得两者之间的定量关系为E50=32qu。本文的研究成果可为盐城滩涂固化土用于各种填土工程提供理论与设计依据。

Yancheng tidal flat has a vast area and a large amount of silt deposited every year,which is rich in tidal flat resources.It is greatly significant to treat the mudflat mud with solidification and apply it to all kinds of soil filling projects.In this paper,the strength characteristics of solidified soil in Yancheng beach were studied.Through unconfined compression test,the influence of cement content,moisture content,age and other factors on the strength characteristics of solidified soil in Yancheng beach was analyzed.The results show that the compressive strength of the solidified soil in Yancheng beach increases with the increase of cement content and curing age,and decreases with the increase of soil moisture content.The strength increases mainly occurrs 28 days ago and reaches 85%of the strength in 90 days’.The relationship between E50 and compressive strength is linear.Through data fitting,the quantitative relationship between E50 and compressive strength is E50=32qu.The research results of this paper can provide a theoretical and design basis for the use of the solidified soil in various filling projects of Yancheng tidal flat.