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1972年11月～12月间,我段在坝桥车站站场高填土路基下,采用预制箱涵顶入法(简称顶管法),顶进8节3米跨度的钢筋混凝土箱涵,修建了一条立交道。应用这种施工方法,在我局还是第一次。由于这次顶管,覆盖层为3米多,加上涵节短,顶进时遇到了许多困难,取得了一些经验教训,现介绍如下。一、工程概况 1.简单情况——这孔3米钢筋混凝土箱涵穿越坝桥车站高填土6股道的站场(预留一股道),全长43.08米,除出口一节5米明挖施工外,其余分4个接力8节顶进,第一接力,头
Between November and December 1972, the section of high embankment at the dam station of Dabaqiao adopted the method of prefabricated box culvert jacking (abbreviated as pipe jacking method), heading into 8 sections of 3 m span reinforced concrete box culvert, An interchange was built. The application of this method of construction is the first time in our bureau. As a result of this pipe jacking, the overburden is more than 3 meters, with short Han dynasties, many difficulties encountered during the jacking, some lessons learned, are presented below. First, the project overview 1 simple situation - This hole 3 m reinforced concrete box culvert crossing the dam station high filling 6-way station (reserved for a Road), a total length of 43.08 meters, in addition to a section of the export of 5 meters Excavation construction, the remaining points four relay 8 top, the first relay, head