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龙海大厦地处哈尔滨市繁华街道中山路一侧,建筑面积25000米~2,地上25层,地下2层,主楼基础为三扩头混凝土灌注桩与箱形基础。基础施工正值雨季,由于基础土方开挖前采取了有效的措施,确保了雨季施工的顺利进行。主楼基础深10.40米,两侧裙房基础分别深6.10米和6.30米。四周建筑物相距最近点为6米。地下水位-30米,土质为亚粘土。情况分析:地下水位低十分有利于施工,但场地狭小无法放坡,相邻建筑物较近需采取防护措施,市区施工不允许采用打入式机械护坡,雨季开挖防止土方塌方、滑坡是基础施工的关键。经过分析和对比,采用一次性分层开挖,钢筋混凝土灌注桩护坡,苫布覆盖法
Longhai Building is located on the side of Zhongshan Road, Fanhua Street, Harbin. It has a building area of 25,000 meters~2, 25 floors above ground, and 2 floors underground. The main building is based on three-headed concrete cast-in-place piles and box foundations. The foundation construction was in the rainy season and effective measures were taken before excavation of the foundation earthwork to ensure the smooth construction of the rainy season. The main building is 10.40 meters deep, and the podium bases on the two sides are 6.10 meters and 6.30 meters deep respectively. The surrounding buildings are 6 meters away from the nearest point. Groundwater level - 30 meters, soil is sub-clay. Analysis of the situation: Low groundwater level is very conducive to construction, but the site is small and can not be grading, adjacent buildings need to take protective measures near the construction, urban construction does not allow the use of type of mechanical protection slope, excavation in the rainy season to prevent the collapse of the earth, landslide is The key to basic construction. After analysis and comparison, one-time layered excavation, reinforced concrete cast-in-place pile slope protection, and sash cover method