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引起越江隧道纵向变形的因素众多,河床冲淤便是其中之一,尤其是对于钱塘江这种河床高层年季变化较大的大冲大淤型河床。以钱江隧道为工程背景,基于Winkler假定和弹性地基梁提出了河床冲淤对于隧道纵向的分析方法,并与模型试验结果进行对比,论证了该方法的合理性。并以此方法探讨了钱塘江越江隧道在最不利工况下的受力变形特征,为工程实际提供一定的理论依据。
There are many factors that cause the longitudinal deformation of the cross-river tunnel. One of them is the riverbed erosion and deposition, especially for the large-sized and large-sized riverbed with large annual variation in Qiantang River. Based on the tunnel project of Qianjiang River, based on the Winkler assumption and elastic foundation beam, a longitudinal analysis method of riverbed scouring and silting is proposed. Compared with the model test results, the rationality of this method is demonstrated. In this way, the stress and deformation characteristics of the Qiantang River tunnel under the most unfavorable conditions are discussed, which provides some theoretical basis for engineering practice.