浅埋暗挖法下穿危旧建筑物施工技术

Construction technology of underpassing old buildings with the method of shallow excavation

北京市北三环和平东桥—太阳宫西路热力外线工程采用浅埋暗挖法施工,工程穿过2层砖混结构的典当行下方,开挖前其北山墙饰面砖及屋顶挑檐上已存在最大达3 cm裂缝。在土质条件差、覆土薄的条件下采用非降水半断面注浆和长管棚加固技术,较好地实施了监测信息反馈,安全穿越了危旧建筑物。

Shallow tunnel construction method is applied in thermic power outside line engineering from HePing East Bridge to TaiYanggong West Road in Beijing,which underpasses two-floor brick-concrete structure.There are some cracks with the width of 3cm in North frontispiece veneer and in rooftop eave before excavation.Half-section grouting without reducing water and long pipe lodgepole reinforce ground technique are used,under the condition of bad geology and thin soil covering the tunnel and the tunnel underpasses the structure area safely while the feedback data is better used.