软土地质条件下抗浮锚杆(索)设计的探讨

Discussion on the design of anti-float anchor( cable) in soft soil geological condition

通常因基础(地下室)底板下存在软弱土层,导致抗浮锚杆(索)存在较长的自由长度;现对其受力模型进行分析,根据弹性受力的特点,其截面面积均较小,轴力与变形较明显;锚杆(索)抗浮力与杆体的伸长成正比,与自由长度成反比;主要通过对锚杆抗浮受力特点进行简述,揭示锚杆抗浮力与变形的关系,提出此类建筑抗浮锚杆设计时应注意事项,并提出相应的设计处理方式,避免由于水浮力引起的地下建筑物的破坏。

Usually because of foundation( basement) soft soil exists under the bottom plate,resulting in anti-floating anchor( cable) the existence of free length. The force analysis model,according to the characteristics of elastic stress,the section area is smaller,the axial force and the deformation is obvious. Bolt( cable) of buoyancy and the rod body is proportional to the elongation,and inversely proportional to the free length. Based on the anchor rod anti-floating force briefly features,and reveal the relationship between the anchor force and deformation,this kind of building anti-floating anchor design matters needing attention,and puts forward the design relevant processing mode,avoid because of underground structures caused by the destruction of the buoyancy of water.