港工技术
港工技術
항공기술
PORT ENGINEERING TECHNOLOGY
2014年
5期
62-67
,共6页
低应力%吹填土%固结%沉降%真空预压
低應力%吹填土%固結%沉降%真空預壓
저응력%취전토%고결%침강%진공예압
low stress%dredger fill%consolidation%settlement%vacuum preloading
通过室内固结试验，研究了低应力水平下吹填土的固结特性。试验结果显示出吹填土在e-σ’坐标系下存在着由超软土状态向一般软粘土状态固结转化的界点。在界点之前，不同初始含水率的吹填超软土孔隙比沿不同曲线变化；在界点之后，不同初始含水率的吹填超软土孔隙比沿土体所固有的压缩曲线变化。对比分析了吹填超软土和普通软土的固结变形量、压缩系数、固结系数的变化规律。
通過室內固結試驗，研究瞭低應力水平下吹填土的固結特性。試驗結果顯示齣吹填土在e-σ’坐標繫下存在著由超軟土狀態嚮一般軟粘土狀態固結轉化的界點。在界點之前，不同初始含水率的吹填超軟土孔隙比沿不同麯線變化；在界點之後，不同初始含水率的吹填超軟土孔隙比沿土體所固有的壓縮麯線變化。對比分析瞭吹填超軟土和普通軟土的固結變形量、壓縮繫數、固結繫數的變化規律。
통과실내고결시험，연구료저응력수평하취전토적고결특성。시험결과현시출취전토재e-σ’좌표계하존재착유초연토상태향일반연점토상태고결전화적계점。재계점지전，불동초시함수솔적취전초연토공극비연불동곡선변화；재계점지후，불동초시함수솔적취전초연토공극비연토체소고유적압축곡선변화。대비분석료취전초연토화보통연토적고결변형량、압축계수、고결계수적변화규률。
The consolidation characteristic of dredger fill under low stress was researched through indoor consolidation test. The test results showed a critical point at which the ultra-soft soil and common soft clay phases of dredger fill become identical based on e-σ’coordinates. The void ratio of ultra-soft soil in different initial moisture contents varies along the distinct curves before the critical point was reached,or its change followed the inherent compression curve of soil body. Ultra-soft soil and common soft clay were compared and analyzed to find out the change rules of consolidation deformation,compression coefficient and consolidation coefficient.
