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文章结合新建山西中南部铁路通道上庄1号隧道项目的工程实际,采用室内试验、数值模拟和现场测试等方法对膨胀土隧道信息化施工技术进行研究,研究结果:各工序中,中台阶施工阶段拱脚处安全系数最小,抗压系数为3.3,抗裂系数为1.5;拱顶下沉、水平收敛、围岩压力和初期支护内力均受后续施工的影响较明显,也均在二次衬砌完成后1周左右收敛;围岩压力是拱部较小、边墙和仰拱较大,初期支护结构内力则相反;左侧围岩压力和初期支护内力均大于相应测点右侧,应调整锚杆位置、设置不等厚初期支护等措施减小其影响。
In this paper, based on the engineering practice of the Shangzhuang 1 tunnel project in the central-southern Shanxi railway corridor, the information construction technology of the expansive soil tunnel is studied by means of indoor test, numerical simulation and field test. The results show that during the construction steps The safety coefficient of the arch foot is the smallest, the compressive coefficient is 3.3 and the crack resistance coefficient is 1.5. The vault sinking, the horizontal convergence, the surrounding rock pressure and the initial internal supporting force are affected by the subsequent construction obviously, The pressure of surrounding rock is smaller, the wall and the inverted arch are larger, and the initial support structure has the opposite internal force; the pressure of the left surrounding rock and the initial support internal force are all larger than the right side of the corresponding measuring point, Should be adjusted anchor position, set the thickness of the initial support and other measures to reduce its impact.