《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“利用压力诱导的充气管法进行隧道加固”

作者：Jeong-Jun Park; In-Sung Cho; In-Mo Lee; and Seok-Won Lee

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，138卷第12期，1483–1491页

关键词：隧道加固；伞拱法；Trapdoor测验；充气管

摘要：本文提出了一种利用压力诱导的充气管法进行隧道辅助施工的新方法。这种方法基于洞扩张理论通过在隧洞顶部形成一个伞拱实现隧道加固。将每一个充气管插入伞拱的钻孔里并加压膨胀，会使得钻孔周围的墙面被压实，最终会使隧道周围墙面的压力状况得到明显改善。为了验证这个新技术的加固影响，进行了大中型室内模型试验，数值分析和Trapdoor试验，并进行了比较分析。在大中型的室内模型试验中，采用了三种类型的充气管来测试其膨胀的能力，结果表明：每一种管都可以在预定的方向膨胀。使用充气管进行的隧道数值分析和附加Trapdoor试验也证明了该技术的加固效果。这些试验表明使用三向充气管的新方法可以减少隧道收敛和面板沉降。

Tunnel Reinforcement by Using Pressure-Induced In flatable Pipes Method

Authors: Jeong-Jun Park; In-Sung Cho; In-Mo Lee; and Seok-Won Lee

Journal:《Journal of Geotechnical and Geoenvironmental Engineering》，Volume 138, Number 12,1483–1491

Key words: Tunnel reinforcement; Umbrella arch method; Trapdoor test; Inflatable pipe

Abstract：A new tunnel auxiliary method, the pressure-induced inflatable pipes method, is proposed in this paper. It utilizes the concept of cavity expansion for tunnel reinforcement by forming an umbrella arch on the roof of the tunnel. When each in flatable pipe is inserted and expanded by pressure in the boreholes of the umbrella arch, the ground around the borehole can be compacted so that the stress conditions

above the tunnel perimeter are changed favorably. To verify the reinforcement effect of this new concept, a pilot-scale chamber test, numerical analysis, and trapdoor test were performed and compared. In the pilot-scale chamber test, three types of inflatable pipes were tested to check their capability for expansion and each type of pipe was demonstrate to function correctly by expanding only in the intended direction. Numerical analysis of a tunnel and the applied trapdoor tests using the inflatable pipes were also performed to determine the reinforcement effects of  the proposed technique. The results imply that the new method with three-directional inflatable pipes can contribute to reducing tunnel convergence and face settlement.

原文链接：http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000725