Effects of Pipe Umbrella Systems on the Stability of the Working Area in Weak Ground Tunneling

摘要：

Weak ground conditions are common in urban areas. In such ground conditions certain potential for instabilities in the working area exists. Therefore, additional support elements supplement the standard support system to achieve stable conditions during construction. The most known additional pre-support system is the face bolt, ensuring face stability. A second group comprises different pre-support techniques, which primarily support the working area. This group of presupport methods comprises the spiling method (forepoling) and the pipe umbrella method (longspan forepoling). By using 3-dimensional numerical calculations, these two methods are compared regarding their effectiveness as support element in weak ground tunneling. Failure can be controlled with both methods. The pipe umbrella method has advantages at frequently changing ground conditions or unexpected changes of the ground properties.

作者: G.M.Volkmann W.Schubert

作者单位: ALWAG Tunnelausbau Gesellschaft m.b.H., Pasching/Linz, AUSTRIA Graz University of Technology, Institute for Rock Mechanics and Tunneling Graz, AUSTRIA

会议类型: 国际会议

会议名称: 2009年岩石力学国际研讨会

会议地点: 香港

会议语种:英文

页码: 1-5

在线出版日期: 2009-05-19（万方平台首次上网日期，不代表论文的发表时间）