潮州供水枢纽西溪厂房基坑支撑的优化

OPTIMAL DESIGN AND APPLICATION OF SUPPORTING SYSTEM IN DEEP FOUNDATION PIT OF CHAOZHOU HYDRO-JUNCTION

通过对“潮州供水枢纽工程西溪厂房”深基坑这一成功优化设计实例的介绍,并从施工条件、工期、经济效益的角度综合考虑,讨论了深基坑连续墙—支撑支护结构的优化问题。该基坑位于河床中,开挖深度大,地质条件差,施工难度大,工期紧,在充分考虑施工条件的基础上,提出了钢筋混凝土支撑优化方案,并制定出相应的开挖方式。该方案满足大型机械施工条件,能大大提高效率,且为确保工期,降低工程造价创造了条件。结果表明:该设计计算成果与实际施工监测数据吻合,并使工程安全完成。

The deep foundation pit of Chaozhou hydro-junction is located at the river bed. The construction sequences are very complicated as a result of its large excavation depth, unfavorable engineering geologic condition, great difficulty of construction and tight time requirement. All these factors are considered in the optimal design and application of supporting system of diaphragm wall with reinforced concrete strut in the deep foundation pit. Excavation scheme is determined accordingly, which can satisfy the requirement of operation of large machines, reduce the construction cost and ensure the construction schedule. The date from monitoring is consistent with the design.