预应力鱼腹式钢支撑在深基坑支护方案优化设计中的应用

Application of prestressed fish-bellied steel brace in optimization design for deep foundation pit support scheme

依托广州南站汽车客运站深基坑工程,针对原支护方案存在的问题与不足,对大面积开挖的深基坑支护设计方案进行了优化设计。介绍了预应力鱼腹式钢支撑的工作原理与优点,利用有限元软件MIDAS/GTS对优化后支护方案进行了数值模拟,并对优化后支护方案与原支护方案进行对比分析,验证了优化后支护方案的合理性,也为预应力鱼腹式钢支撑这种绿色环保的支护形式在实际工程中的应用提供了一定的参考。

Based on the deep foundation pit project of Bus Terminal of Guangzhou South Railway Station,aiming at the problems and shortcomings in the original support scheme,the design scheme of deep foundation pit support for large area excavation was optimized. The working principle and advantages of prestressed fish-bellied steel braces were introduced.The optimized support scheme was simulated by using finite element software MIDAS/GTS. The optimized support scheme was compared with the original support scheme to verify the rationality of the optimized support scheme. It also provided a reference for the application of green and environmental protection form of prestressed fish-bellied steel braces in the practical engineering.