客运专线隧道内接触网基础预留锚栓组方案探讨

摘要

阐述了客运专线隧道内采用预埋锚栓组方案将接触网吊柱固定于隧道壁的可实施性。此种方法的力学性能及经济性能均介于后植入化学锚栓及预埋轨槽方式之间。从接触网吊柱柱底荷载计算、锚栓组承载能力、锚栓组对混凝土锥体破坏区域影响及施工措施等方面进行论证。对3种隧道内接触网基础预留锚固形式即预埋轨槽、后植入化学锚栓、锚栓组方式进行简要比较。得出若能对隧道施工工艺进行优化，预埋锚栓组将比预埋轨槽、后植入化学锚栓这两种方法经济性能更高、结构安全可靠，可作为今后高速电气化铁路隧道内优先考虑的一种预留锚固方法。%The feasibility of an embedded anchor bolt group scheme which is used in fixing OCS davit on tunnel sidewall of passenger dedicated line is described.The mechanical performance and economic performance of this scheme are all between the post-install embedded chemical anchor bolt form and the embedded rail slot form.A brief comparison of three reserved anchorage forms is made,including embedded rail slot form,post-install chemical anchor bolt form and anchor bolt group form.The conclusion is,if the tunnel construction technology could be optimized,the implantation of anchor bolt group form would be more economic and reliable than the other forms,and in future it will be used as the priority reservation anchoring method in high-speed e-lectrified railway tunnel.