本文選題：滲透注漿　切入點(diǎn)：速凝漿液　出處：《巖土力學(xué)》2017年02期 　論文類型：期刊論文

【摘要】：速凝類漿液的黏度時(shí)變性及雙液注漿方式導(dǎo)致漿液黏度空間分布不均勻,在滲透注漿理論模型中應(yīng)當(dāng)考慮漿液黏度空間分布不均勻性的影響�；陴ざ葧r(shí)變性賓漢流體本構(gòu)模型,引入了描述滲流過(guò)程的均勻毛管組模型,建立了恒定注漿速率條件下考慮漿液黏度時(shí)空變化的一維滲透注漿擴(kuò)散模型。設(shè)計(jì)了一維可視化滲透注漿擴(kuò)散模擬試驗(yàn)系統(tǒng),獲得了不同介質(zhì)滲透率及不同注漿速率條件下水泥-水玻璃漿液(C-S)注漿壓力隨時(shí)間變化規(guī)律。研究結(jié)果表明:考慮漿液黏度空間分布不均勻性時(shí),孔口注漿終壓計(jì)算值為試驗(yàn)值的1.2~1.4倍,漿液擴(kuò)散距離計(jì)算值為試驗(yàn)測(cè)量值的0.9~1.1倍,計(jì)算值與試驗(yàn)值的誤差在可接受范圍內(nèi),所創(chuàng)建的理論模型可較好地描述速凝漿液一維滲透注漿擴(kuò)散過(guò)程。不考慮漿液黏度空間分布不均勻性時(shí),孔口注漿終壓計(jì)算值為試驗(yàn)值的3.5~4.1倍,漿液擴(kuò)散距離計(jì)算值為試驗(yàn)測(cè)量值的0.5~0.7倍,顯著高估了注漿壓力、低估了漿液擴(kuò)散范圍。因此,在注漿設(shè)計(jì)中應(yīng)充分考慮速凝漿液黏度空間分布不均勻性。
[Abstract]:The time-varying viscosity of the quick-solidified slurry and the two-fluid grouting mode lead to the non-uniform distribution of the viscosity of the slurry in space. In the theoretical model of permeable grouting, the influence of the inhomogeneity of the spatial distribution of the viscosity of the slurry should be considered. Based on the constitutive model of Bingham fluid with time-varying viscosity, a uniform capillary group model is introduced to describe the seepage process. A one dimensional permeable grouting diffusion model considering the temporal and spatial variation of slurry viscosity was established under the condition of constant grouting rate, and a one dimensional visual simulation test system was designed. The variation of grouting pressure with time under different medium permeability and different grouting rate is obtained. The results show that when the spatial distribution of slurry viscosity is considered, The calculated value of the final grouting pressure at the orifice is 1.2 ~ 1.4 times of the test value, and the calculated value of the dispersion distance of the slurry is 0.9 ~ 1.1 times of the measured value. The error between the calculated value and the test value is within the acceptable range. The theoretical model established in this paper can well describe the one-dimensional permeable grouting diffusion process of the rapid solidified slurry. When the spatial distribution of the slurry viscosity is not considered, the calculated value of the final grouting pressure at the orifice is 3.5 ~ 4.1 times of the experimental value. The calculated value of slurry diffusion distance is 0.5 ~ 0.7 times of the measured value, which significantly overestimates grouting pressure and underestimates the range of slurry diffusion. Therefore, the non-uniformity of viscosity spatial distribution should be fully considered in grouting design.
【作者單位】： 山東大學(xué)巖土與結(jié)構(gòu)工程研究中心;
【分類號(hào)】：TU457

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