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1981年8月到12月,隧道工程局第二工程处和局科研所在雷公尖隧道进行了双线全断面5米探孔预裂爆破开挖的进洞试验,取得了初步的成果。兹介绍于后。 一、工程概况 雷公尖隧道位于衡广(衡阳—广州)复线坪乐(坪石—乐昌)北段,全长3.078公里,双线,电气牵引。由隧道工程局二处负责施工,计划工期1981年8月至1985年12月完工,
From August to December 1981, the tunneling test was conducted on the double-line full-face 5m borehole pre-cracking blasting at the Second Engineering Office of the Tunnel Engineering Bureau and the Leigongjian tunnel at the Bureau of Scientific Research Institute. Preliminary results were obtained. It is introduced later. I. Project Overview Leigongjian Tunnel is located in the northern section of Hengyang (Hengyang-Guangzhou) Fuxingping Leping (Pingshi-Lechang) with a total length of 3.078 kilometers and double-wire and electric traction. The tunnel engineering bureau is responsible for the construction of two, the planned duration of August 1981 to December 1985 completion,