摘要
把原广泛应用于治理边坡滑坡的预应力锚杆推广到人行悬索桥锚固体系,借鉴现有规范公式结合最新预应力锚杆动荷载作用机理的研究成果,通过设计安全系数和活载沿着锚固段分布情况,对现有适用于治理边坡滑坡的预应力锚杆的规范公式进行修正,以保证结构的安全可靠。采用劲性混凝土锚固框架结构作为后锚固联接转换装置,有效解决锚固系统刚度和强度问题。在锚固框架结构外围设置截水沟和场地硬化等措施,保证该结构不被流水冲刷破坏。并通过工程实践验证该锚固结构与常规重力式锚锭相比在经济和环保效益上有很大的优势。
The prestressed anchors that were widely used in the treatment of slopes and landslides were extended to the anchorage system of pedestrian suspension bridges. The existing norms and formulas were combined with the latest research results of the dynamic load mechanism of prestressed anchors. According to the design safety factor and live load distribution along the anchoring section,the existing standard formula for prestressed anchor rods suitable for the treatment of slope landslides is revised to ensure the safety and reliability of the structure. The rigid concrete anchor frame structure is adopted as the rear anchor connection conversion device to effectively solve the rigidity and strength problems of the anchor system. Measures such as water intercepting trenches and site hardening are provided around the anchor frame structure to ensure that the structure is not damaged by flowing water. And through engineering practice,it is verified that this anchoring structure has great advantages in economic and environmental benefits compared with conventional gravity anchor ingots.
作者
陈忠辉
CHEN Zhonghui(Fujian Fuda Architecture Design Co Ltd,Fuzhou 350002;College of Civil Engineering,Fuzhou University,Fuzhou 350108)
出处
《福建建筑》
2020年第4期69-72,共4页
Fujian Architecture & Construction
关键词
预应力锚杆
动荷载
人行悬索桥
Prestressed anchor bars
Dynamic load
Pedestrian suspension bridge
