Field study of tensile force character of double-layered geogrid in reinforced gravel cushion

HU Qi-jun; XIE Qiang; QING San-hui

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Field study of tensile force character of double-layered geogrid in reinforced gravel cushion

更新时间：2026-06-25

- Field study of tensile force character of double-layered geogrid in reinforced gravel cushion
- Vol. 28, Issue 4, (2007)
- 作者机构：
  
  1. 西南交通大学土木工程学院,成都,610031
  2. 铁道第二勘察设计院,成都,610031
- 作者简介：
- 基金信息：
- DOI：
  CLC： U213.1+52.3
- Online First：05 September 2013，
  
  Published：2007
- 稿件说明：
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HU Qi-jun, XIE Qiang, QING San-hui. Field study of tensile force character of double-layered geogrid in reinforced gravel cushion[J]. 2007, 28(4).
DOI：

HU Qi-jun, XIE Qiang, QING San-hui. Field study of tensile force character of double-layered geogrid in reinforced gravel cushion[J]. 2007, 28(4). DOI：

摘要

通过现场试验，表明线路中心处加筋垫层中横向格栅拉力值最大，双层格栅中横向格栅拉力顶层较底层减少了 29.5 %；纵向格栅顶层比底层先发挥作用。铺轨加载增大了纵横两向格栅的拉力，但对路基变形没有影响。加筋垫层提高了复合地基中的桩土应力比。

Abstract

According to field study

it is shown that the tensile force of geogrid in the crosswise direction is largest in the road center; the upper layer reduce 29.5 percent compared with the lower layer in double-layer grid; geogrid of the upper layer in the longitudinal direction works earlier than the lower layer. Track laying can enlarge the value of the tensile force of geogrid in the longitudinal and crosswise directions; but without influence on the roadbed deformation. The reinforced cushion can increase the value of stress ratio of pile to soil inside composite foundation .

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