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随着上海轨道交通建设的不断深入推进,隧道向着更深的地下空间发展。隧道埋深的加大,使得盾构进洞土层及环境趋于复杂化,为此需探索更安全有效的盾构进洞方式。以上海轨交17号线虹桥火车站施工为例,在穿越已建建筑下方时通过应用水平冷冻技术与钢套箱相结合的盾构进洞新技术,保证了盾构的顺利进洞。
With the continuous deepening of the construction of Shanghai’s rail transit, the tunnel will develop toward deeper underground space. Increasing the depth of the tunnel makes the shield tunnel into the soil layer and the environment tends to be complicated, so to explore more safe and effective way to shield the hole. Taking the construction of Shanghai Hongqiao Railway Station on the 17th line of Shanghai Rail Transit as an example, a shield tunneling new technique combining horizontal freezing technology and steel box casing is adopted when crossing underneath the existing building to ensure smooth shield tunneling.