类十字条形基础在软弱地层现浇梁工程中的应用

Application of Crossbar-like Foundation in Cast-in-situ Beam Engineering in Weak Formation

沿海地区由于其独特的地理、地质条件,广泛的分布着深厚的软弱土层,软弱土层具有水量高,压缩性高,孔隙比大等性质,这些性质给该地区的工程建设带来了极大的挑战,软弱地层不良土层深度深,地基处理难度大,地表水丰富,现浇梁钢管贝雷支架复合地基承载力要求高,支架基础处理难度大。以厦漳同城大道流传特大桥现浇梁钢管贝雷支架基础为对象,通过对比传统条形基础和优化后的类十字条形基础,分析两种基础的受力特性、结构安全性和适用性等。

Because of its unique geographical and geological conditions,the coastal areas are widely distributed with deep soft soil layers,which are characterized by high water content,high compressibility and large pore ratio.These properties bring great challenges to the engineering construction in this area.The depth of poor soil layer in weak stratum is deep,foundation treatment is difficult,surface water is rich,bearing capacity of cast-in-situ steel pipe berry support composite foundation is high,and support foundation treatment is difficult.Taking the castin-situ beam steel pipe Berry support foundation of Xia-Zhang Avenue Spread Bridge as the object,this paper analyses the stress characteristics,structural safety and applicability of the two foundations by comparing the traditional strip foundation with the optimized quasi-cross strip foundation.