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近几年来,国内现场观测与室内模型试验发现,锚定板挡土结构墙背实测土压力大于按库伦理论计算的主动土压力值。这一发现,已引起工程界的注意,并在设计中予以考虑。一般认为,这一现象的存在是由于锚定板支挡建筑物中墙身与土体之间的相对位移受到拉杆、锚定板约束,墙面板与锚定板之间的主动裂面不易形成(主动裂面通常移至锚定板之后)所造成的。通常还认为,锚定板结构的墙背土压力介于主动土压力与静止土压力之间。并建议暂将库伦主动土压力值乘以增大系数m.作为锚定板挡土结构设计时的计算土压力,此项增
In recent years, domestic on-site observations and indoor model tests have found that the back-actual measured soil pressure of the anchorage plate retaining wall is greater than the active earth pressure value calculated according to the Coulomb theory. This discovery has attracted the attention of the engineering community and is considered in the design. It is generally believed that this phenomenon is due to the fact that the relative displacement between the wall body and the soil body in the anchorage plate supporting building is constrained by tie bars and anchor plates, and the active fracture surface between the wall plate and the anchor plate is not easily formed. (After the active split plane is usually moved to the anchor plate). It is also generally believed that the wall back pressure of the anchor plate structure is between the active earth pressure and the static earth pressure. It is suggested that the Coulomb active earth pressure value be multiplied by the increase coefficient m. as the calculated soil pressure during the design of the anchorage plate retaining structure.