Abstract This paper reports full scale experiments, under simulated heavy traffic, of geocell and EPS (expanded polystyrene) geofoam block inclusions to mitigate the pressure on, and deformation of, shallow buried, high density polyethylene (HDPE) flexible pipes while limiting surface settlement of the backfilled trench. Geocell of two pocket sizes and EPS of different widths and thickness are used. Soil surface settlement, pipe deformation and transferred pressure onto the pipe are evaluated under repeated loading. The results show that using EPS may sometimes lead to larger surface settlements but can alleviate pressure onto the pipe and, consequentially, result in lower pipe deformations. This benefit is enhanced by the use of geocell reinforcement, which not only significantly opposes any EPS-induced increase in soil surface settlement, but further reduces the pressure on the pipe and its deformation to within allowable limits. For example, by using EPS geofoam with width 0.3 times, and thickness 1.5 times, pipe diameter simultaneously with geocell reinforcement with a pocket size 110 × 110 mm2 soil surface settlement, pipe deformation and transferred pressure around a shallow pipe were respectively, 0.60, 0.52 and 0.46 times those obtained in the fully unreinforced buried pipe system. This would represent a desirable and allowable arrangement.

中文翻译：

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将 EPS 土工泡沫与土工格室相结合，以减少埋管载荷和沟渠表面车辙

摘要 本文报告了在模拟繁忙交通条件下，土工格室和 EPS（发泡聚苯乙烯）土工泡沫块夹杂物的全尺寸实验，以减轻浅埋高密度聚乙烯（HDPE）软管的压力和变形，同时限制其表面沉降。回填的战壕。使用两种口袋尺寸的土工格室和不同宽度和厚度的EPS。在重复加载下评估土壤表面沉降、管道变形和传递到管道上的压力。结果表明，使用 EPS 有时可能会导致更大的表面沉降，但可以减轻对管道的压力，从而降低管道变形。土工格室加固的使用增强了这种好处，它不仅显着反对 EPS 引起的土壤表面沉降增加，但进一步将管道上的压力及其变形降低到允许的范围内。例如，采用宽0.3倍、厚1.5倍的EPS土工泡沫，管径与袋装土工格室加固同时进行，袋装尺寸为110×110 mm2的土表沉降、管道变形和浅管周围传递压力分别为0.60、0.52 0.46 倍于完全未加固的埋地管道系统。这将代表一种理想和允许的安排。浅管周围的管道变形和传递压力分别是完全未加固埋管系统的 0.60、0.52 和 0.46 倍。这将代表一种理想和允许的安排。浅管周围的管道变形和传递压力分别是完全未加固埋管系统的 0.60、0.52 和 0.46 倍。这将代表一种理想和允许的安排。