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洋碰隧道是京珠高速公路粤境北段最长的越岭隧道,由于隧址区内地质条件复杂,断裂构造发育,隧道穿过大小断裂20多条,主要灾害形式为涌水,以典型F12、F13断层破碎带交汇处洞内涌水为例,在介绍工程地质特征基础上,分析了隧道涌水原因;由于F12与F13断层影响带较宽,地表水不断补给断层带,地面出现很多陷坑,提出了采用洞内深层注浆与小锚索加固围岩的综合整治措施,通过隧道断面围岩接触压力监测,该断层破碎带整治效果良好。
Yangping Tunnel is the longest Yueling Tunnel on the northern section of the Beijing-Zhuhai Expressway. Due to the complex geological conditions and the fault structure in the tunnel area, the tunnel passes through more than 20 large and small fractures. The main disaster form is gushing water. The typical F12 , F13 fault fracture zone convergence tunnel as an example, based on the introduction of engineering geological features, the analysis of the reasons for the tunnel gushing water; F12 and F13 fault impact of a wide belt, the surface water continues to supply fault zone, the ground a lot of craters, put forward In order to comprehensively control the surrounding rock with deep grouting and small anchors in the tunnel, through the monitoring of the contact pressure of the surrounding rock in the tunnel section, the effect of remediation of the broken zone of the fault is good.