浅埋偏压隧道洞口施工技术

Construction Technology of Tunnel Opening with Shallow Buried Partial Pressure

洞口段施工是隧道施工的关键环节.本文结合国省干线横九线何家陂隧道进洞方案的成功工程实例, 采用反压护拱、 大管棚超前支护、 砂浆锚杆、 超前小导管及锚喷联合支护加固洞口岩体, 利用监控量测技术指导施工, 保证洞口浅埋段的施工安全.

the construction of Dongkou section is the key link of tunnel construction. In this paper, combined with the successful project example of the project of the ho Jibei tunnel in the nine line of the trunk line of the provincial trunk line, this paper adopted the anti pressure arch, the front support of the large pipe shed, the mortar bolt, the advanced small catheter and the bolt and shotcrete support to reinforce the rock mass in the tunnel, and guided the construction by monitoring and measuring technology. The construction safety of the shallow buried section of the hole was ensured.