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西成高速铁路辅助洞室进入主洞无法避开地质条件较差的地带,并与主洞斜交。由此,开洞口时洞身岩体不对称,应力集中问题更为严重,拱墙钢支撑受力不对称,侧向受力不平衡突出,施工过程中采取加强连接筋、增加随机锚杆、锁脚管棚等措施成功解决侧向受力不对称的侧向稳定问题,最终保证了后续工程安全地完成施工。
West into high-speed railway auxiliary cave into the main hole can not avoid the geological conditions of poor areas, and the main cave bias. As a result, when the opening hole is opened, the rock mass is asymmetric and the problem of stress concentration is more serious. The steel support of the arch wall is under asymmetric stress and the lateral stress is unbalanced. In the course of construction, reinforcing bars are added to increase the random bolt, Locking tube shed and other measures to successfully solve the lateral stress asymmetry lateral stability issues, and ultimately ensure the safety of subsequent projects to complete the construction.