盾构隧道近接斜穿运营公路安全评估及对策

Safety Evaluation and Countermeasures of Shield Tunnel Adjacent Inclined Crossing Operation Highway

以某地铁18号线合江车辆段出入段线区间为例,通过数值模拟等方法,对盾构隧道近接斜穿运营一级公路进行安全评估,分析公路路面的变形情况,提出相应的对策措施。结果表明:盾构隧道近接斜穿对一级公路的影响较小,控制值均在规范允许范围内;理论计算值与施工监测值之间存在一定的差异。提出盾构信息化施工及地面注浆加固等变形控制主要措施。

Taking the access section of Hejiang car depot of Line 18 of a Metro as an example,the safety evaluation of the shield tunnel adjacent inclined crossing the operating first-grade highway is carried out through numerical simulation and other methods,the deformation of the road surface is analyzed,and the corresponding countermeasures are put forward.The results show that the impact of the shield tunnel adjacent inclined crossing the first-grade highway is small,and the control values are within the allowable range of the code.There are some differences between the theoretical calculated value and the construction monitoring value.The main deformation control measures such as shield informationization construction and ground grouting reinforcement are put forward.