建筑物下软岩巷道建设过程中的支护载荷问题研究

Research on Supporting Load Problems During Construction Process of Soft Rock Roadways Under Buildings

在软岩巷道建设过程中,软岩巷道失稳是影响建设安全的重要问题。通过分析巷道围岩与巷道支护之间的相互作用,经过力学计算,得出软岩巷道失稳的主要原因。经过理论分析与实例论证,软岩巷道的正确支护的设计前提是建立稳定的支护,在稳定的支护作用下使周围围岩的积蓄能可以最大限度地释放,另外,使以变形形式转换的工程力达到最大值,这样巷道围岩的自承力也能趋近于最大值,这时巷道的支护力可以趋近于最小值。

During the construction process in soft rock tunnel excavation, the instability of soft rock tunnel excavation is an important issue affecting the safety of construction. Through analyzing the interaction between roadway support and roadway surrounding rocks, through the mechanical calculation, it is concluded that the main cause of instability of soft rock roadways. Through theoretic analysis and example demonstration, for the correct supporting design of soft rock roadway excavation, the premise is to establish stable support, in the stable supporting the surrounding rock under the action of savings can release in maximum. In addition, to make the transformation in the form of deformation and maximum in mechanical engineering, so serf-supporting force of roadway surrounding rock can also tend to be the maximum, the roadway supporting force can tend to be the minimum.