大型铁路枢纽站城市通廊特大深基坑支护施工技术

Large Railway Hub Station Urban Corridor Construction Technology of Deep Foundation Pit Support

哈尔滨火车站的城市通廊深基坑支护工程地质情况复杂,地下水丰富,临近既有线施工,为保证基坑周边既有线、站台及建筑物安全,基坑开挖前采取可靠的支护、止水、降水及回灌措施,以防止基坑周边地基沉陷。在施工中,通过对钻孔灌注桩+锚杆支护、水泥搅拌桩止水、井点降水、回灌等多个措施的组合应用,保证了特大深基坑施工过程中的质量及安全。

the geological conditions of the deep foundation pit support engineering of Harbin railway station urban corridor are complex,and the groundwater is rich.The construction is close to the existing line.In order to ensure the safety of the existing lines,platforms and buildings around the foundation pit,reliable support,water stop,precipitation and recharge measures should be taken before the foundation pit excavation to prevent the foundation settlement around the foundation pit.In the construction,the combined application of bored pile+anchor bolt support,cement mixing pile water stop,well point dewatering,reinjection and other measures ensures the quality and safety in the construction process of extra large deep foundation pit.