软土地质条件下抗浮锚杆(索)设计的探讨
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(CCDI悉地国际,上海 200235)[摘要]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;文章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;[关键词]软弱土层;地下抗浮;锚杆(索);变形破坏;预应力中图分类号:TU47 文献标识码:A 文章编号:1002-848X(2013)S1-0906-04Discussion on the design of anti-float anchor (cable) in soft soil geological conditionZhu Zhifeng(CCDI GROUP,Shanghai 200235,China)Abstract: 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;Keywords: soft soil; underground anti-floating; bolt (cable ); deformation and failure; prestressing force