In order to analyze the influencing factors of external water pressure and seepage volume of lining structures in tunnel engineering construction,by using the control variable method,the following characteristics of the external water pressure and seepage flow of the non-pressure circular tunnel are examined in relation to the thickness of the grouting lay-er,the permeability coefficient of the initial lining,the permeability coefficient of the secondary lining,and the permea-bility coefficient of the groove.The external water pressure and the seepage flow of the secondary lining decrease in a progressive fashion with the increase of grouting layer thickness,or the decrease of the permeability coefficient of the grouting layer and the main lining.Compared with the initial lining,the consolidation grouting has more significant con-trol on the seepage flow of the lining.With the increase of grouting layer thickness to a certain extent,the changes of ex-ternal water pressure and seepage flow of lining tend to be gentle,so the parameters such as grouting layer thickness and permeability coefficient should be reasonably selected considering construction cost and engineering safety.
关键词
衬砌/外水压力/渗流/灌浆/渗透系数
Key words
lining/external water pressure/seepage/grouting/permeability coefficient
维普
万方数据