模块式加筋土挡墙的力学行为现场测试中英文分析.doc

模块式加筋土挡墙的力学行为现场测试中英文分析 Modular mechanical behavior of reinforced soil retaining wall on site test analysis in both Chinese and English 本文通过对模块式高填方加筋土挡墙的现场测试，研究了具有高填方特征下模块式加筋土挡墙的力学行为。结果表明该挡墙具有较好的整体稳定性，实测所得侧向土压力小于通过经典理论计算的静止土压力和主动土压力，各测试断面的拉筋实测应变均小于1.0%。 Based on modular high fill reinforced soil retaining wall of the field test, studies the characteristic under high fill modular mechanical behavior of reinforced soil retaining wall. Results show that the retaining wall has good overall stability, and the measured lateral earth pressure less than by classical theory of calculate the static earth pressure and the active earth pressure, the test section of the brace of the measured strain is less than 1.0%. 　　1 工程概况　 1 project summary 　张承高速路部分路段线路两侧房屋密集，且还要修筑辅道。公路旁边有灌渠，灌渠的断面不可压缩，为减少公路占地，采用模块式土工格栅加筋土挡土墙，墙高4.8m～6.8m。 Zhang Cheng highway sections of the road lines on both sides of the house, and also build a causeway. Irrigation system by the side of the road, irrigation channel cross section is compressed, in order to reduce highway covers, adopts the modular geogrid reinforced soil retaining wall, the wall is 4.8 m ~ 6.8 m. 　　加筋土挡墙模块尺寸为长×宽×高=0.5m×0.2m×0.2m。采用C25混凝土预制块作为挡墙面板，HDPE单向土工格栅在模块内预埋6cm，并外留一段完整肋条，加长土工格栅与预埋土工格栅通过连接棒连接。墙高低于3.2m的范围内每0.4m（即每两层模块）铺设一层土工格栅，在3.2m以上高度每0.6m铺设一层土工格栅。路面结构的基层中铺设两层EG90土工格栅，要求其碳黑含量应为2%～2.5%，以满足土工格栅拉筋长期抗老化性能。挡墙下部土工格栅的强度大于88kN/m，相对应变不大于10%，2%应变时的抗拉强度不小于23.7kN，5%应变时的抗拉强度不小于45.2kN，长期（120年）蠕变极限强度不小于34kN/m。挡墙上部土工格栅的强度应大于64.5kN/m，相对应变不大于10%，2%应变时的抗拉强度不小于16.1kN，5%应变时的抗拉强度不小于30.9kN，长期（120年）蠕变极限强度大于25.5kN/m。　　由基础至墙顶在加筋土挡墙背设置25cm砂砾反滤层。在砂砾层外2～4.5m范围内填筑8%石灰土。素土填至3.0m，3.0m以上填筑粉煤灰，以降低路基整体重量，以达到减小填料对加筋土挡墙的压力的目的。 Reinforced soil retaining wall module size for length x width x height = 0.5 m * 0.2 m * 0.2 m. Use C25 concrete precast blocks as a retaining wall panel, HDPE unidirectional geogrids embedded within the module 6 cm, outside to keep a complete rib, and lengthen the embedded grille and geogrid connected through the connecting rod. W