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为了有效缓解大中城市现有交通压力,在我国近几年城市地铁开发建设得到较大的发展,但旧有规划仍占很大比重,加之地铁一般埋深浅,且位于主干道下方,经常也会下穿既有建构筑物,为工程建设增加了危险系数。工程结合工程实例对下穿主干道下方雨污水等众管线的超浅埋大跨平顶直墙暗挖风道袖阀管水平超前注浆加固地层的施工工艺进行介绍。
In order to effectively alleviate the existing traffic pressure in large and medium-sized cities, great progress has been made in the development and construction of urban metro in our country in recent years. However, the old planning still accounts for a large proportion of the total. In addition, the metro generally buries shallow and is below the main road, Will wear the existing buildings under construction, adding a risk factor for the construction. Project with the engineering examples of the next under the main road rain sewage and other public pipeline ultra-shallow buried large-span flat-topped straight wall excavation duct sleeve advanced horizontal injection grouting reinforcement stratum construction process are introduced.