本文選題：沉降試驗 + 沉積泥沙��； 參考：《巖土工程學報》2017年S1期

【摘要】：Terzaghi理論中的固結(jié)系數(shù)為定值,應(yīng)用于沉積泥沙大變形固結(jié)計算時存在較大誤差,而沉積泥沙固結(jié)系數(shù)的試驗測定仍存在一定困難。沉降柱試驗?zāi)芡暾哪M低濃度泥沙的沉積固結(jié)過程,準確獲取泥沙沉降過程曲線和沉積層體積分數(shù)分布曲線。在此基礎(chǔ)上,基于不同階段泥沙沉降過程控制方程,通過作圖方法得到沉降控制方程的擬合參數(shù),得到了隨固結(jié)過程連續(xù)變化的沉積泥沙自重固結(jié)系數(shù)。根據(jù)固結(jié)過程中的沉積泥沙滲透系數(shù)和體積壓縮系數(shù)變化規(guī)律,同樣得到四種不同的固結(jié)系數(shù)求解方法,并討論了各影響因素對沉積泥沙自重固結(jié)系數(shù)的影響趨勢。
[Abstract]:The consolidation coefficient in Terzaghi theory is a definite value. There is a big error in the calculation of the consolidation coefficient of sediment in large deformation, but it is still difficult to measure the consolidation coefficient of sediment. The sedimentation column test can completely simulate the sedimentation consolidation process of low concentration sediment and obtain the sedimentation process curve and sediment volume fraction distribution curve accurately. On this basis, based on the governing equation of sediment settlement process in different stages, the fitting parameters of the sedimentation control equation are obtained by drawing method, and the self-gravity consolidation coefficient of sediment is obtained, which varies continuously with the consolidation process. According to the variation law of sediment permeability coefficient and volume compression coefficient in consolidation process, four different methods of solving consolidation coefficient are also obtained, and the influence trend of each influencing factor on sediment self-weight consolidation coefficient is discussed.
【作者單位】： 鐵道第三勘察設(shè)計院集團有限公司;城市軌道交通數(shù)字化建設(shè)與測評技術(shù)國家工程實驗室;河海大學巖土工程科學研究所;
【分類號】：TU411

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