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某软土区圆形煤场大深度地下拱形输煤廊道,其底板作为基坑支护桩的水平支撑,传统设计方法无法考虑基坑支护及水平支撑对拱形廊道受力的影响.建立含地下廊道、基坑支护及地基土的三维有限元模型,对廊道在正常运行工况下的受力特点进行了比较分析,分析结果表明,基坑支护桩对廊道底板的轴向及转动约束较强,考虑支护影响后廊道内力变化较大.
The deep underground arch corridor in a round coal yard in a soft soil area has its bottom plate as the horizontal support for the foundation pit supporting pile. The traditional design method can not consider the support of the foundation pit and the horizontal support to the arch corridor The three-dimensional finite element model of ground corridor, foundation pit support and foundation soil is established, the force characteristics of the corridor under normal operating conditions are comparatively analyzed, the results show that the foundation pit supporting pile to the corridor Road floor and rotation of the strong constraint, considering the influence of the corridor after the change of internal forces larger.