软土地基毗邻防汛大堤深基坑施工技术

深基坑的支护结构,不仅要保证基坑内能正常作业安全,而且要控制基底及坑外土体移动,保证基坑附近建筑物、道路、电力设施等的正常运行。甬江特大桥D3承台毗邻防汛大堤、施工便道、变压器。该文介绍了其深基坑施工技术,结合地质、水文勘察,对基坑支护、开挖及降水进行合理的方案设计。并通过方案比选和专家论证,积极采取质量控制措施,保证了深基坑施工工程质量和防汛大堤的安全。

Construction Technology of Deep Foundation Pit Adjacent to Flood Prevention Embankment in Soft Soil Subgrade

The supporting and protecting structure of deep foundation pit not only ensures the normal working safety within the pit,but also controls the soil movement in the bed and outside the pit so as to ensure the normal operation of its adjacent buildings,roads and power facilities. D3 base slab of Yongjiang Bridge is adjacent to the flood prevention embankment,construction bypass and transformers. According to the geological and hydrological prospecting,the schemes are reasonably designed for the supporting,excavation and dewatering of the pit. After the comparison and selection of the schemes and the demonstration of the experts,the quality control measures are taken for guaranteeing the construction engineering quality of deep pit and the safety of the flood prevention embankment.