渝怀铁路涪秀二线隧道岩溶治理措施与工程实例

Measures and Engineering Project Cases of the Tunnel Karst Treatment in the Fuxiu Second Line of the Yuhuai Railway

渝怀铁路涪秀二线隧道施工揭示大量溶洞,施工安全风险大;对岩溶隧道进行分类,针对不同情况采取砼回填、钢花管注浆、高压旋喷桩或桩基托梁(或梁桥)结构跨越等治理措施,结合现场工程实例验证,取得了良好的效果.

A large number of karst caves were discovered during the tunnel construction in the Fuxiu second line of the Yuhuai Railway,with high safety risks during the construction.The karst tunnels are classified,and different control measures are taken according to different project conditions,including concrete backfill,steel tube grouting,high pressure jet grouting pile or pile foundation joist(or beam bridge) structure crossing.Well effect of construction is verified according to the site engineering project cases.