构件再精准，地脚螺栓埋歪了照样装不上。预埋精度控制在 ±2mm 以内的实操经验。Perfect fabrication is useless if anchor bolts are misplaced. Field-tested ways to hold ±2mm.
出口项目的钢构件在工厂加工，精度可以控制在 ±2mm 内；但地脚螺栓是在业主现场预埋的，一旦埋偏，第一批构件到场就会「对不上眼」。
我们的实操经验：一是预埋前与土建方核对轴线控制网，采用固定支架定位而不是直接绑扎在钢筋上；二是浇筑后、构件到场前做一次复测，发现偏差及时用校正钢板处理；三是深化图里明确标注螺栓外露长度与丝扣保护要求。
雄岚的安装图随箱附带预埋验收表，多数当地施工队按表自检即可达标。提前两天发现偏差，和构件到场后才发现，是完全不同的两种项目体验。
Export members are fabricated in the factory to ±2mm — but anchor bolts are set by the owner's civil crew, and if they drift, the first shipment simply won't fit.
Practical field experience: verify the control grid with the civil contractor before setting, and use positioning fixtures instead of tying bolts directly to rebar; re-survey after pouring and before members arrive so deviations can be corrected with shim plates; and mark bolt projection length and thread protection clearly on the erection drawings.
Xionglan ships a bolt-position acceptance checklist with the drawings, so most local crews can self-check successfully. Finding a deviation two days early is a very different experience from finding it when the steel arrives.
上海雄岚钢结构 · 出口 60+ 国家 · EN 1090 CE 认证 · 24 小时内工程师回复
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