双线盾构隧道下穿排水箱涵地面沉降分析

Analysis of Ground Settlement for Double-lines Shield Tunnel Passing beneath a Drainage Culvert

以金洲大道站至雷锋西站区间盾构隧道穿越排水箱涵工况为例,运用FLAC3D有限元软件构建了双线盾构隧道下穿排水箱涵的三维有限元计算模型。通过数值分析,深入探讨了土体注浆加固措施在减少地面沉降和控制沉降形变方面的有效性,揭示了盾构隧道下穿排水箱涵对地面沉降演化规律的复杂影响,并通过数值分析验证了盾构隧道上方土体经过注浆加固后能显著减缓盾构隧道掘进时引起的排水箱涵及地面沉降沉降,从而有效保护地下排水箱涵以及地面结构的安全与稳定。

Focusing on the segment of shield tunneling from Jinzhou Avenue Station to Leifeng West Station,specifically where it crosses underneath a drainage culvert,FLAC3Dfinite element software was used to develop a 3Dfinite element model for a double-lines shield tunnel intersecting a drainage culvert.Through detailed numerical analysis,the efficacy of soil stabilization techniques in mitigating surface subsidence and managing deformation patterns was thoroughly investigated.It unveils the intricate effects that tunneling beneath drainage culverts has on the development of ground subsidence.Furthermore,the analysis confirms that soil stabilization efforts can significantly reduce both the rate and unevenness of subsidence triggered by such tunneling activities,thus effectively safeguarding the integrity and stability of surface structures.