豎井地基熱排水固結(jié)模型試驗(yàn)
發(fā)布時間:2018-08-19 06:47
【摘要】:設(shè)計(jì)豎井熱排水固結(jié)模型試驗(yàn)系統(tǒng),選取寧波地區(qū)典型軟黏土,在室溫和水熱循環(huán)溫度70℃下分別開展排水固結(jié)和熱排水固結(jié)模型試驗(yàn),分析加熱、分級堆載、恒載降溫階段各測點(diǎn)的溫度、孔隙水壓力及地表沉降變化規(guī)律。研究結(jié)果表明:熱排水固結(jié)法可加速地基模型的固結(jié)速率,固結(jié)度達(dá)到90%所需時間較排水固結(jié)法所需時間減少;經(jīng)過溫度歷史后,地表最終沉降量增加,土的抗剪強(qiáng)度有所提高,增強(qiáng)軟基處理效果。在試驗(yàn)基礎(chǔ)上,分析熱排水固結(jié)法作用機(jī)理,結(jié)合已有先期固結(jié)壓力隨溫度變化理論,按e-lgp曲線法建立熱排水固結(jié)法的沉降計(jì)算公式,并對豎井模型地表沉降進(jìn)行計(jì)算,與試驗(yàn)結(jié)果吻合較好,初步驗(yàn)證公式的合理性。
[Abstract]:The model test system of hot drainage consolidation in shaft is designed. Typical soft clay in Ningbo area is selected. The model tests of drainage consolidation and thermal drainage consolidation are carried out at room temperature and 70 鈩,
本文編號:2190977
[Abstract]:The model test system of hot drainage consolidation in shaft is designed. Typical soft clay in Ningbo area is selected. The model tests of drainage consolidation and thermal drainage consolidation are carried out at room temperature and 70 鈩,
本文編號:2190977
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