素混凝土桩复合地基高层建筑沉降研究

Settlement of High Rise Building with Plain Concrete Pile Composite Foundation

为分析复合地基沉降计算方法在西安地区的适用性,实测了西安地区某住宅小区多个应用素混凝土桩复合地基的高层建筑沉降数据,并将实测数据与多种复合地基沉降计算方法得到的计算结果进行了对比分析,探讨了同类工程地质条件下不同沉降计算方法的适用性,提出了不同计算方法的沉降经验系数。研究表明:在西安地区类似的复合地基沉降计算时,文中第二种统一算法简单易行且其计算结果与实测沉降变形最为接近;压力扩散法所得到的计算结果偏于安全且变异性较小,适于对计算结果进行复核。

In order to analyze the applicability of some composite foundation settlement calculation methods in Xi＇an area,some settlement data of many high-rise buildings which applied plain concrete pile composite foundation were measured. Those settlement data and some calculation results which get from various composite foundation settlement calculation methods were compared and analyzed. The applicability of different calculation methods in similar engineering geological conditions was discussed. Some settlement experience coefficients of different calculation methods were proposed. The results show that similar composite foundation settlement calculation,the second unified algorithm is simple and its result is the closest to the measured settlement. The calculation result of the pressure diffusion method tends to be safe and the variation is smaller,the calculation method is suitable for the check of calculation results.