绥芬河市新华街隧道围岩稳定分析

绥芬河市新华街隧道是目前黑龙江省最长的公路隧道,该隧道东起新华街,西至301国道,其最大埋深为101.1m,由于隧道穿越区域地质条件复杂,地应力较高,因此在前期施工过程中,已经出现了局部掉块现象。为了避免隧道在施工与运营期内出现大面积垮塌情况,本文对隧道的稳定性进行了分析评价,该隧道出现岩爆的可能极小,但是洞室围岩有塑性破坏的可能,为了防止由于塑性破坏诱发的塌落现象,建议采用4~5m的系统锚杆进行支护。

Stability Analysis of Tunnel Surrounding Rock in Suifenhe City Xinhua Street

Suifenhe Xinhua Street tunnel is the longest highway tunnel in Heilongjiang province.The tunnel begins in the east from the Xinhua Street,and ends at the National Highway 301 in the west,and its biggest buried depth is 101.1m.Due to the complex geological conditions and high stress of tunnel,so in the early construction,there has been a local chip off-falling phenomenon.In order to avoid the collapse phenomenon in large areas in the construction and operation period of tunnel,this article made analysis and evaluation on tunnel stability,and thought that the tunnel had only a frail chance of rock bursting,but cavern surrounding rock may appear plastic failure.In order to prevent collapse phenomenon induced by plastic failure,4~5m are recommended to support system of bolt.