不断流装置及不断流工法;FLOW-UNDISRUPTED APPARATUS AND FLOW-UNDISRUPTED CONSTRUCTION METHOD

摘要

本发明具备：具有「形成于第1分割壳，且延伸于既设管的径向之分歧状的分歧孔」的密闭壳、及「将密闭壳与既设管之间予以密封」的橡胶垫圈，在第1分割壳设有用来装卸穿孔机的凸缘，密闭壳可朝管轴方向往复移动，橡胶垫圈形成：「包围着密闭壳之设有分歧孔的部位，并封闭分歧孔」的第1密封区域、及「邻接于第1密封区域，并且对第1密封区域形成密封，从第1密封区域朝管轴方向偏移，且用来暂时地封闭利用切刃形成穿孔之开孔」的第2密封区域，在垫圈安装沟与第2密封环之间，形成有可供第2密封环脱逃的容许空间。; a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the branch pipe portion of the first separate case is provided with a flange for allowing for attachment and removal of the boring machine; the sealing case is capable of reciprocating in a pipe axis direction of the existing pipe; the rubber packing forms: a first sealed area surrounding a portion of the sealing case where the branch hole is provided for sealing the branch hole; and a second sealed area sized available for shutting the opening bored by the cutter, the second sealed area being adjacent to the first sealed area, sealed against the first sealed area, and displaced from the first sealed area in the pipe axis direction, an allowable space where a second seal ring comes into is formed between a rubber-packing-fixed groove and a second seal ring