數(shù)值模擬聚氨酯碎石層防治路基翻漿病害影響研究

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中圖分類號(hào)：TQ323.8 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1001-5922（2025）07-0013-04

Abstract：Combined with arailway reconstructionand expansion project，the method of laying composite geotextiles on top and botom ofthe polyurethane gravel layer was usedto preventand control the disease of slurryand mud in theroadbed.Taking the composite geotextile structure of polyurethane gravel layer asthe research object，the finite element software was used to establish thecalculation model，and itsmechanical behavior and waterproof performance were studied by numerical simulation.The results showed that the polyurethane gravel layer had good mechanical behavior，which could reduce the displacement，strain and stress of the roadbed.The polyurethane gravel layer had goodanti-seepage performance，which could effectively prevent the wateratthe bottom of the roadbed from pouring into theroadbed along the foundationbed to form slurry；Laying compositegeotextileson top and bottom of the polyurethane gravel layer could playa role inreducing the displacement of the roadbed，homogenizing stress，and strengthening the waterproof performance of the structure.Based on the principle of orthogonal test，the optimal design scheme of polyurethane gravel layer and composite geotextile structure was determined.

Key words：railway subgrade ； slury and mud pumping;； polyurethane gravel layer;composite geotextile; numericalsimulation;orth-ogonal test

針對有砟軌道路基基床翻漿冒泥的病害，傳統(tǒng)的整治手段有更換基床填土，修建防排水系統(tǒng)，設(shè)置封閉層，但是上述方法開挖規(guī)模大，對軌道結(jié)構(gòu)擾動(dòng)較大[1]。（剩余5538字）