黄土隧道全环加长套拱超前小导管贴壁进洞施工技术

Construction technology of leading small pipe sticking to wall and entering tunnel in loess tunnel with full ring lengthened arch sleeve

文章以蒙华铁路MHTJ-14标12座黄土短隧道群施工为例,提出了一种黄土隧道全环加长套拱超前小导管贴壁进洞施工方法,节约了工期,保证了施工安全,同时又不破坏隧道洞口既有边坡原貌。不仅践行了绿色施工的理念,减少了扬尘污染,又避免了水土流失,保护了生态环境。

Taking the construction of 12 loess short tunnels in mhtj-14 bid section of Menghua railway as an example,this paper puts forward a construction method of full ring lengthening arched advance small pipe sticking to the wall of loess tunnel,which not only saves the construction period and ensures the construction safety,but also does not damage the original appearance of the tunnel portal slope.Not only has the concept of green construction been practiced,dust pollution has been reduced,soil erosion has been avoided,and the ecological environment has been protected.