预埋爬锥承载能力计算方法研究分析

Research and Analysis on Load-Bearing Capacity Calculation Method of Pre-embedded Climbing Cones

摘要:

预埋爬锥托架法因其高效性和经济性在桥梁施工中得到广泛应用。然而，我国目前尚未制定预埋爬锥的设计标准，这在实际工程中容易引发设计不合理。为解决这一问题，依据预埋爬锥的破坏形式，对国内外相关标准的规定进行分类，探讨各标准的内在联系及适用范围。研究提出，在锚栓承载能力要求之外，还应补充混凝土基材的破坏验算。结合预埋爬锥施工的工程经验，重点分析锚栓边距、间距及锚固深度对混凝土承载能力的影响，最终形成一套适用于桥梁墩柱预埋爬锥体系承载能力的设计方法。该设计方法已在北京亮马河北路桥梁工程中得到应用，并经实际工程验证其有效性，可为同类工程项目提供参考依据。

Abstract:

The pre-embedded climbing cone bracket method is widely used in bridge construction due to its efficiency and economic advantages. However, there are currently no design standards for pre-embedded climbing cones in China. This is likely to cause unreasonable design in practical projects. To address this issue, and based on the failure modes of pre-embedded climbing cones, the provisions of relevant standards at home and abroad are categorized, and the intrinsic connections and applicable scopes of each standard are discussed. It is proposed that in addition to the requirements for the bearing capacity of anchor bolt, the failure verification of the concrete substrate should also be supplemented. Combined with the engineering experience of pre-embedded climbing cone construction, the focus is on analyzing the effects of anchor bolt edge distance, spacing, and anchoring depth on the bearing capacity of concrete. Finally, a set of design method suitable for the bearing capacity of pre-embedded climbing cone systems in bridge piers is formed. The design method has been applied in the Beijing North Liangma River Road Bridge Project, and its effectiveness has been validated through practical engineering, which can provide a referring basis for similar projects.