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锚碇基础是悬索桥的关键受力部位,它的总体稳定性和受力状态直接影响到大桥的安全和长期使用的可靠性。当悬索桥设计桥面宽度一定时,若采用的隧道式锚碇截面变化情况下,锚塞体长度的确定除了与设计主缆缆力的数值大小有关外,还应考虑如何充分利用锚塞体围岩的力学性能。本文通过拟建的坝陵河悬索桥西岸隧道式锚碇锚塞体长度方案比选的数值模拟研究,获得锚塞体合理经济的长度,以供设计参考。
The foundation of anchorage is the key force of suspension bridge. Its overall stability and stress state directly affect the safety of the bridge and the reliability of long-term use. When the width of bridge deck is designed, if the section of tunnel anchorage is changed, the length of anchor should not only be related to the value of the main cable force, but also how to make full use of the anchor body Mechanical properties of rock. In this paper, through the numerical simulation study on the length selection scheme of the tunnel anchorage in the West Bank of the Bailing River Suspension Bridge, the reasonable economic length of the anchor is obtained for design reference.