高填方下加筋土高挡墙实测变形分析  

Analysis of In-situ Measured Deformation of Reinforced High Earth-retaining Wall with High Fill

作　　者：雷胜友[1] 惠会清[2] 高攀[3] 张磊[4] 

机构地区：[1]长安大学公路学院,西安710064 [2]长安大学理学院,西安710064 [3]中铁隧道集团有限公司技术中心,河南洛阳471009 [4]长安大学建筑工程学院,西安710064

出　　处：《长江科学院院报》2017年第2期84-88,93,共6页Journal of Changjiang River Scientific Research Institute

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)

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。In order to reveal the deformation law of a three-level reinforced earth retaining wall in a V-shapedvalley,according to in-situ test data,we analyzed the changes in wall panel displacement,settlement of backfill of the wall,settlement of road surface on high fill,and settlement of the bottom of culvert beneath the wall in construction period and after completion. Results revealed that the vertical and horizontal displacements of wall panels,and the deformations of the backfill mainly occurred during the construction period,and the values of displacements and deformations were relatively large. One or two years after the completion,the deformation tended to be stable,but the total cumulative deformation was large,which indicated that the reinforced earth retaining wall could adapt to the large deformation of filling projects,which is an advantage. Moreover,the structure of reinforced high earth retaining wall beneath high fill in V-shaped valley could meet the challenges posed by road surface settlement,and the culvert beneath high fill is safe. Besides,since the reinforcements of the wall are reinforced concretes,the reinforced earth wall has some advantages of anchoring board retaining wall and soil nailing wall,which could restrain the deformation of soil mass in the wall,and also serves as a whole to coordinate the deformation of V-shaped valley. Hence the stresses in the fill are redistributed,road surface settlement and deformation are transited smoothly with no significant settlement difference and good application effect.

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 

分 类 号：TU476.4[建筑科学—结构工程]