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盾构隧道粘度时变性浆液壁后注浆渗透扩散模型

, PP. 127-134

Keywords: 隧道工程,盾构隧道,理论推导,壁后注浆,粘度时变性,浆液扩散

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Abstract:

？在假定注浆浆液为粘度时变性流体,并在盾尾间隙影响厚度范围内均匀柱面扩散的前提下,应用达西定律对盾构壁后注浆渗透范围及浆液对管片造成的压力进行了理论推导,得到了浆液扩散半径及对管片产生压力的计算式。通过具体实例,对比分析了是否考虑粘度时变性2种条件下浆液扩散半径及对管片产生压力的计算结果,以及不同胶凝时间下浆液扩散半径及对管片产生压力的计算结果。分析结果表明:2种条件下,浆液扩散半径及对管片产生的压力随注浆压力、注浆时间的变化规律不尽相同,粘度时变性对浆液扩散半径及对管片产生的压力影响显著,可通过调整浆液配比来改变粘度时变性,进而影响浆液扩散半径及对管片产生的压力,但浆液对单位面积管片的压力几乎不受粘度时变性的影响。

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