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魏 平1 , 何 君1 , 盛園園2 , 張 佳3 , 鄭 華3
( 1 . 水發(fā)規(guī)劃設(shè)計(jì)有限公司 , 山東 濟(jì)南 250100 ; 2. 山東省水文中心 , 山東 濟(jì)南 250002 ;
3 . 中國(guó)建筑土木建設(shè)有限公司 ,北京 100071)
摘 要 :吹填土固結(jié)特性及固結(jié)沉降對(duì)地基的穩(wěn)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(duì)象,對(duì)現(xiàn)場(chǎng)土樣進(jìn)行了壓縮試驗(yàn)和剪切試驗(yàn),研究吹填土在排水固結(jié)過(guò)程中的沉降變化規(guī)律。結(jié)果表明:吹填砂性土在高含水率狀態(tài)下會(huì)發(fā)生較大的沉降變形,隨著含水率的降低沉降變形會(huì)逐漸減小;圍壓能夠改變土體原來(lái)的內(nèi)部結(jié)構(gòu),使土顆粒間的排列發(fā)生變化,并且圍壓越大,土體的塑性破壞應(yīng)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(tài)下具有較大的壓縮變形,導(dǎo)致土體產(chǎn)生過(guò)大的沉降變形。
關(guān)鍵詞:吹填堤防;砂性土;固結(jié)特性;固結(jié)沉降
中圖分類號(hào):TU43
文獻(xiàn)標(biāo)志碼:A
文章編號(hào): 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(jiǎn)介:魏 平(1987—), 男,碩士,高級(jí)工程師,研究方向:水利工程規(guī)劃設(shè)計(jì)。
通信作者: 張 佳(1986—), 男,本科,高級(jí)工程師,研究方向: 工程施工管理。
收稿日期:2024- 07- 03
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