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首页> 外文会议>Geosynthetics in Civil and Environmental Engineering >NUMERCIAL ANALYSIS OF GEOGRID AND PLASTIC DRAINAGE PLATE USED IN EXISTED RAILWAY ALTERATION PROJECT
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NUMERCIAL ANALYSIS OF GEOGRID AND PLASTIC DRAINAGE PLATE USED IN EXISTED RAILWAY ALTERATION PROJECT

机译：既有铁路改建工程中土工塑料排水板的数值分析

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摘要

To fit the demand of train speeding, existed railway should be widened, which causes the redistribution of the stress in the consolidated soft soil foundation that leads to unequal post-construction settlement, influences the stability of the roadbed. To eliminate above diseases, geogrid and plastic drainage plate usually be used. The paper uses FEM from aspects as layout manner, length, stiffness, interaction effect of geogrid, whether use plastic drainage plate and its span to analyze the stability of roadbed, max unequal post-construction settlement and consolidation time. The following conclusions are obtained: Geogrid apparently improves the roadbed slope stability of each stage, but has little effect on unequal post-construction settlement and consolidation; Plastic drainage plate apparently accelerates the consolidation and decreases the unequal post-construction settlement of roadbed. It has little effect on stability after consolidation; In roadbed widening project on soft soil foundation, geogrid and plastic drainage plate all have its work and should be used in combined way to perform the better engineering effect.
机译：为了满足列车超速的需求，应扩建现有的铁路，这会导致固结软土地基中应力的重新分布，从而导致施工后沉降不均，影响路基的稳定性。为了消除上述疾病，通常使用土工格栅和塑料排水板。从布置方式，长度，刚度，土工格栅的相互作用效果，是否使用塑料排水板及其跨度等方面来进行有限元分析，以分析路基的稳定性，施工后最大不均匀沉降和固结时间。得到以下结论：土工格栅明显改善了每个阶段的路基边坡稳定性，但对不平等的施工后沉降和固结影响不大；塑料排水板显然加速了固结，减少了路基施工后不均等的沉降。固结后对稳定性影响不大；在软土地基路基拓宽工程中，土工格栅和塑料排水板均已完成工作，应结合使用，以取得较好的工程效果。

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