What to Review Before Prestressing Works Start / 预应力施工前应重点复核什么

Before stressing, the important risks are anchorage space, rebar conflict, duct alignment, tendon support, grout venting, concrete strength and jacking sequence. 张拉前风险重点在锚具空间、钢筋冲突、孔道线形、定位支架、压浆排气、混凝土强度和张拉顺序。

Do Not Review Drawings Only / 不只复核图纸

A prestressing method review must connect drawings with site access, rebar installation, duct fixing, concrete placement and actual jacking operation. 预应力方法复核必须把图纸、现场空间、钢筋安装、孔道定位、混凝土浇筑和实际张拉操作连起来。

Critical Items / 关键项目

Check anchorage clearance, tendon profile, rebar collision, duct support spacing, grout venting, stressing end access, concrete strength requirement, jacking sequence and emergency handling. 重点检查锚固空间、束形、钢筋冲突、孔道支架、压浆排气、张拉端空间、混凝土强度要求、张拉顺序和异常处理。

Interface Risks / 接口风险

Prestressing problems often come from interfaces: tendon and rebar conflict, MEP opening conflict, insufficient jacking space, missing venting tubes or poor protection before concrete pouring. 预应力问题常出在接口：钢束与钢筋冲突、机电洞口冲突、张拉空间不足、排气管遗漏或浇筑前保护不到位。

Why It Saves Cost / 为什么能省成本

Most expensive prestressing problems appear after concrete placement or stressing. Early review reduces rework, delay, demolition and dispute between trades. 很多高成本问题发生在浇筑后或张拉后，提前复核能减少返工、停工、拆改和专业之间的责任争议。