排桩支护结构内支撑优化设计

针对石家庄地区的地质水文情况,对于排桩内支撑基坑支护体系,于基坑中部增加一道格构柱作为钢支撑支点的设计方案,相比无格构柱的钢支撑设计方案,可以起到减少深基坑钢支撑道数、避免出现倒换支撑、节约投资、便于施工等作用。为详细说明排桩钢支撑支护体系增加格构柱支点设计方案的优势,通过结合石家庄地铁3号线一期工程小灰楼站的设计方案,采用深基坑设计软件FRWS7.1进行支护体系验算和技术、经济比对分析,从而验证了该方案的可行性和经济性。

An Optimized Design of Row Pile Timbering System

According to the geological conditions of Shijiazhuang area, compared with no supporting design scheme of the steel lattice column, the design scheme of a doug structure column as the fulcrum of the central steel support in foundation pit in the inner supporting piles foundation pit system can reduce the number of deep foundation pit steel support, avoid support switching, save investment, simplify construction. To detail the advantages of the addition of lattice column pivot design in row pile bracing system, based on the design of the first stage project of small grey building on Shijiazhuang subway station line 3, the software FRWST. 1 of deep foundation pit design was used to do the calculation and the technical analysis, economic comparison, thus proved the feasibility and economy of the scheme.