岩锚在山区无支撑缆索吊装系统的应用

山区建设工程中,多以较大跨径的钢管混凝土拱桥梁跨越障碍物,由于受所处地形限制无法使用大型设备进行施工,故无支撑缆索吊装系统被广泛应用于该类桥的施工中.缆索吊装系统常用的锚碇有:重力式锚、桩锚、隧道锚、岩锚等,其中岩锚工程量最小,施工时间短,成本低,文章以尖山特大桥新建工程为例介绍其在该系统中的应用.

In mountain construction projects, most of the long-span concrete-filled steel tubular arch bridges cross obstacles, the constraints of the terrain can not use large-scale equipment for construction, therefore the unsupported cable hoisting system is widely used in the construction of this kind of bridges. The anchorages commonly used in cable hoisting system are gravity anchor, pile anchor, tunnel anchor, rock anchor and so on. Among them, the quantity of rock anchor is the smallest, the construction time is short and the cost is low. This paper takes the new construction project of Jianshan Bridge as an example to introduce its application in this system.