用牵绳把自行式起重机吊臂臂头与后面的地锚牵拉起来以提高起重量的措施叫做牵绳起吊,俗称“加辫子”或“拉浪风”(图1)。地锚至吊钩正下方的水平距离 L 叫作地锚定位距。L 值必须根据起重量确定才能保证起重机受力安全。但具体计算比较复杂,施工人员往往仅凭估计确定,时有失误,造成事故。本文分析了牵绳措施对起重 The use of a pull rope to pull the boom of the boom of the self-erecting crane and the ground anchor behind it to increase the lifting capacity is called lifting of the leash, commonly known as “adding the rake” or “pulling the wind” (Figure 1). The horizontal distance L from the ground anchor to just below the hook is called the anchor positioning distance. The L value must be determined based on the weight to ensure the safety of the crane. However, the specific calculation is more complicated. Construction workers often rely only on estimates to make mistakes and cause accidents. This article analyzes the rope pulling measures for lifting