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永久性抗浮锚桩的施工目的是为了解决建筑物整体抗浮问题。以北京胜古庄小区工程为例 ,介绍了其施工的技术关键。锚孔钻进时机为旋喷桩固结体终凝初期 1 2～ 1 4 h;桩位偏差在旋喷体中心的任何方向不超过 1 0 mm;与旋喷体垂直度偏差应小于 8%。为此采用前导式三翼钻头 ,钻进速度为 2 0 0 mm/min。
The purpose of permanent anti-floating anchor pile construction is to solve the overall anti-floating building. Taking Beijing Shengguozhuang Residential Area Project as an example, the key technology of its construction is introduced. Anchor drilling time is the initial consolidation of rotary jet grouting body final 12 ~ 14 h; pile deviation in the direction of the whirlpool body in any direction does not exceed 10 mm; deviation from the vertical distribution of the swirl body should be less than 8% . A leading tri-wing drill was used for this purpose, with a drilling speed of 200 mm / min.