西施坡隧道管棚超前支护效应的研究

Research on Xi Shi Po tunnel pipe roof in advance support effect

管棚超前支护技术是隧道开挖常见的辅助方法之一,在防止隧道塌方、抑制地层位移、控制地表沉降等方面发挥着重要作用,本文以西施坡隧道为例,运用FLAC 3D数值模拟手段分析研究管棚超前支护技术对地表沉降的抑制作用,抑制效果达到30%左右,同时通过分析预支护后的监测量控数据进一步研究支护效果。

Pipe roof advance support technology is one of the common auxiliary tunnel excavation method, to prevent the tunnel collapse, inhibition of strata displacement, plays an important role in aspects such as the surface subsidence control, Xi Shi Po tunnel as an example, this paper, by means of FLAC 3 D numerical simulation analysis of the pipe shed advance support technology of the inhibitory effect of the surface subsidence,around 30% inhibition effect,then explain its supporting effect is successful and effective.