新研发的压力分散型悬锚式挡墙通过安装多个锚定板及对锚索施加预应力,减少了挡墙的被动变形量,提高了锚定板极限锚固力,应用效果良好,但挡墙土压力分布规律也因此发生了显著改变,对结构受力将产生显著影响。为了揭示压力分散型悬锚式挡墙土压力分布规律,结合在建工程进行了现场试验,现场埋设土压力盒、锚索测力计等监测仪器,研究分析了填土过程中压力分散性挡土墙基底压力、侧向土压力、锚定板处压力及锚索拉力的变化规律。监测结果表明:随着填土增高及锚索预应力的施加,该类型挡土墙基底压力出现外侧压力与内侧压力峰值的交替变化,即挡墙表现为先向外倾后向内倾的变形趋势;挡土墙侧向土压力在施加锚索预应力前,表现为主动土压力分布模式,而施加预应力后,则表现为应力突变现象,侧向土压力明显增大,呈抛物线分布趋势;张拉顺序会影响锚索拉力值,使得锚索越靠近张拉端拉力值越大,锚定板受力越大。 The newly developed pressure-dispersion type anchored retaining wall can reduce the passive deformation of the retaining wall and increase the anchoring force of the anchor plate by applying a plurality of anchor plates and prestressing the anchor cable, and the application effect is good. However, As a result, the distribution of wall pressure has changed significantly, which will have a significant impact on the structural force. In order to reveal the pressure distribution law of pressure-dispersive anchored retaining wall, the site test was carried out in combination with the construction in progress. The monitoring instruments such as earth pressure box and anchor cable dynamometer were buried in the site, and the pressure dispersion profile Soil wall base pressure, lateral earth pressure, anchor plate pressure and anchor tension variation. The monitoring results show that with the increase of filling depth and the prestressing of anchor cable, the base pressure of this type of retaining wall alternates with the peak value of the outside pressure and the inside pressure, that is, the retaining wall shows the tendency of first outward-leaning backward-leaning deformation The lateral earth pressure on the retaining wall shows the distribution mode of active earth pressure before the prestressing of the anchor cable. After the prestressing, the phenomenon of sudden stress changes and the lateral earth pressure obviously increases, showing a parabolic distribution trend. Tension order will affect the tension value of the anchor cable so that the closer the anchor cable is to the tension end, the larger the anchoring plate force will be.