地下通道最优导洞宽的数值模拟研究

Study on Numerical Simulation of the Optimal Pilot Width an Underground Pedestrian Pass

以武汉市雄楚大街地下过街通道为研究对象,通过设定地下通道横断面的不同导洞宽,以30mm的地面沉降控制值和减少开挖步序繁琐程度为目标,采用数值模拟方法对4导洞,5导洞,6导洞,7导洞的开挖方式进行模拟计算,对比分析各导洞宽开挖后产生的地表沉降值,确定最优导洞宽。研究结果表明6导洞、7导洞产生的地表沉降最大值满足30mm的地表沉降控制标准,同时基于尽量降低开挖繁琐程度的标准,6导洞开挖为最优选择。

This paper presents the numerical analysis results of the effect of pilot pass width on the subsidence of the street by using the construction of an underground passage of Xiongchu Street in Wuhan.The objective of this numerical study is to minimize the ground subsidence and simplify the underground excavation sequence.Different pilot widths are numerically studied in pilot passes No.4 through No.7.It is concluded that the pass widths in Pilot nos 6 and 7 meet the ground settlement criteria by Pilot No.6 has the best simplicity.As a result of this study,the pass width and excavation sequence of Pilot No.6 was selected.