某加筋土挡墙开裂倾斜原因分析及研究

Analysis and Research on the Reason of Cracking and Inclination of Reinforced Retaining Wall

通过对山西晋城市某段加筋挡土墙工程进行土质、地下水、变形、垂直度的勘探与检测,并根据相关标准和计算分析,揭示挡墙开裂主要因为墙后填土不密实,从而造成填土似摩擦系数降低,减弱加筋带与土体之间的摩擦力,且土体由于本身自重固结及墙体排水不通畅引起少量外来水下渗导致墙后填土主动土压力增大,即墙体排水不畅致使填土含水率过大,从而降低了填土的内摩擦角、粘聚力及似摩擦系数,致使加筋带与土体之间产生相对变形等问题。

Based on the exploration and detection of the soil, groundwater, deformation, as well as the vertical of the reinforced retaining wall in Jincheng city, Shanxi province, it was found that the reason for the cracks in the retaining wall was that the soil was not filled compactly enough behind the retaining wall, which also caused the reduction of interface coefficient of friction and all the friction between the fill and geogrids. The active earth pressure was increased because of the infiltration in ground water and the consolidation in soil. Namely, the angle of internal friction, cohesion and interface coefficient of friction were reduced by poor drainage behind retaining wall. Thus, the deformation between reinforced belt and soil emerged.