高填方下加筋土高挡墙实测变形分析

发布时间：2018-01-21 14:35

本文关键词： 墙面板高填方加筋土挡墙 “V”形沟谷钢筋混凝土筋带现场试验　出处：《长江科学院院报》2017年02期 　论文类型：期刊论文

【摘要】：为了揭示位于"V"形沟谷中的某座3级加筋土挡墙的变形规律,在现场实测数据的基础上,重点分析了高填方下3级加筋土高挡墙墙面板位移、墙后填土体沉降、高填方下路面沉降以及挡墙下涵洞底部沉降在施工期间和竣工后的变化情况。结果表明:1加筋土挡墙墙面板的水平位移、竖向位移以及墙后填土体的沉降主要发生在施工期间,且数值都比较大,竣工后1~2 a的时间内,其变形趋于稳定,但总的累积变形较大,说明加筋土挡墙能够适应较大变形的填方工程,这是其优势所在;2在"V"形沟谷中采用高填方下加筋土高挡墙的结构形式能满足路面沉降要求,高填方下的涵洞也是安全的;3由于挡墙筋带的特殊性,使得形成的加筋土挡墙具有锚定板挡墙和土钉墙的某些优点,既能约束墙内土体的变形,又能作为整体很好地同周围"V"形沟谷变形相协调,使得填方内应力重分布,路面沉降变形平缓过渡,未产生明显差异沉降,使用效果良好。这种挡墙结构在山区公路铁路建设中具有广阔的应用前景,值得推广。
[Abstract]:In order to reveal the deformation law of a 3 grade reinforced earth retaining wall located in the V shape valley, the displacement of the 3 grade reinforced earth high retaining wall panel under the high fill is analyzed emphatically on the basis of the field measured data. The variation of soil settlement behind the wall, pavement settlement under high fill and the bottom settlement of culvert under retaining wall during construction and after completion. The results show that the horizontal displacement of the face slab of reinforced earth retaining wall is 1: 1. The vertical displacement and settlement of the backfill soil occurred mainly during the construction period, and the values were relatively large. Within 1 ~ 2 years after completion, the deformation tended to be stable, but the total cumulative deformation was larger. It shows that the reinforced earth retaining wall can adapt to the large deformation of the fill project, which is its advantage; (2) the structural form of high fill and reinforced earth high retaining wall in "V" valley can meet the pavement settlement requirements, and the culvert under high fill is also safe; Because of the particularity of retaining wall reinforced soil retaining wall has some advantages of anchored plate retaining wall and soil nailing wall which can restrain the deformation of soil in the wall. As a whole, it can be well coordinated with the surrounding "V" shape valley deformation, which makes the stress redistribution in the fill, and the pavement settlement and deformation are smooth transition, without obvious differential settlement. This kind of retaining wall structure has broad application prospect in mountain area highway and railway construction, and it is worth popularizing.
【作者单位】：长安大学公路学院;长安大学理学院;中铁隧道集团有限公司技术中心;长安大学建筑工程学院;
【基金】：陕西省自然科学基金项目(2001C01) 地质灾害防治与地质环境保护国家重点实验室开放基金项目(GZ2005-03) 陕西省交通科技项目(06-01K) 长安大学精品课建设项目(2006)
【分类号】：TU476.4
【正文快照】： 1研究背景某高速公路要通过一处“V”形黄土大冲沟,经综合考虑后在下部设计成3级加筋土挡墙,每级挡墙(含基础)高度为10.5 m,上部填筑成24 m高的缓坡路堤,这样填方体的总高度为54.7 m,这在高速公路的建设上比较少见。对于这种特殊地形中的加筋土挡墙的墙面板位移、墙后填土体的

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