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魏    平¹  ,  何   君¹  ,  盛園園² ,  張   佳³ ,  鄭    華³

( 1 .  水發規劃設計有限公司 ， 山東 濟南 250100 ;  2.  山東省水文中心 ， 山東 濟南 250002 ;

3 .  中國建筑土木建設有限公司 ，北京 100071)

摘   要 ：吹填土固結特性及固結沉降對地基的穩定性具有重要影響。以黑龍江干流工程吹填砂性土為研究對象，對現場土樣進行了壓縮試驗和剪切試驗，研究吹填土在排水固結過程中的沉降變化規律。結果表明：吹填砂性土在高含水率狀態下會發生較大的沉降變形，隨著含水率的降低沉降變形會逐漸減??；圍壓能夠改變土體原來的內部結構，使土顆粒間的排列發生變化，并且圍壓越大，土體的塑性破壞應力越大；吹填砂性土體的沉降變形主要是由土體孔隙水排出引起的，砂性土在高含水率狀態下具有較大的壓縮變形，導致土體產生過大的沉降變形。

關鍵詞：吹填堤防；砂性土；固結特性；固結沉降

中圖分類號：TU43            

文獻標志碼：A           

文章編號： 1005- 8249   (2024)  05- 0071- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.05 .013

 

WEI Ping¹  ,  HE Jun¹  ,  SHENG Yuanyuan² ,  ZHANG Jia³  ,  ZHENG Hua³

( 1 . Shuifa Planning & Design Co .，Ltd.，Ji ’nan 250100 ,  China;  2. Hydrological  Center of Shandong

Province ,  Ji ’nan 250002 ,  China;  3. China Construction Civil Engineering Co. ，Ltd. ，Beijing 100071 ,   China)

Abstract：Blow-fill soil consolidation characteristics and consolidation settlement have an important impact on the stability of the foundation. In this paper, taking the sandy blow-fill soil of Heilongjiang main stream project as the research object, compression test and shear test were carried out on the soil samples on the site, and at the same time, the change rule of settlement of blow-fill soil in the process of drainage and consolidation was studied. The results show that the settlement deformation of blow-fill sandy soil will be larger in the state of high water content, and the settlement deformation will be gradually reduced with the reduction of water content; the perimeter pressure can change the original internal structure of the soil body, so that the arrangement of the soil particles changes, and the larger the perimeter pressure is, the larger the plastic destructive stress of the soil body is; the settlement deformation of the blow-fill sandy soil is mainly caused by the pore water drainage of the soil body, and the sandy soil has larger compression deformation in the state of high water content, the soil samples have larger compression deformation, and the sandy soil has larger compression deformation in the process of drainage consolidation in the dry stream project. The sandy soil has large compression deformation under high water content, which leads to excessive settlement deformation of the soil body.

Keywords: blow-fill embankment; sandy soil; consolidation characteristics; consolidation settlement

作者簡介：魏   平(1987—), 男，碩士，高級工程師，研究方向：水利工程規劃設計。

通信作者： 張   佳(1986—), 男，本科，高級工程師，研究方向： 工程施工管理。

收稿日期：2024- 07- 03