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王喜堂，徐鋼，朱巖，王輝
（深圳市同濟(jì)人建筑設(shè)計有限公司，深圳518057）[摘要]《建筑地基基礎(chǔ)設(shè)計規(guī)范》(GB50007-2002) 5.2.4條規(guī)定了地基承載力特征值修正計算的公式，但在實際工程中高層建筑應(yīng)用地基承載力特征值修正計算的例子并不多見，特別是在超高層建筑采用筏板基礎(chǔ)的地基基礎(chǔ)設(shè)計中就更加少見了。沈陽茂業(yè)中心292m高的超高層建筑采用筏板基礎(chǔ)，基礎(chǔ)持力層為圓礫層，地基承載力特征值為650kPa，但設(shè)計需要的地基承載力特征值為760kPa，其中l(wèi)lOkPa地基承載力差額是通過對地基承載力特征值的修正來彌補(bǔ)的。通過對其地基承載力進(jìn)行修正計算和設(shè)計，為今后類似工程的基礎(chǔ)設(shè)計及地基承載力修正設(shè)計計算提供參考依據(jù)。
[關(guān)鍵詞] 承載力特征值；修正系數(shù)；基礎(chǔ)埋深Application of calculation for subgrade beaning capacity in tall building's raft foundation design
Wang Xitang, Xu Gang, Zhu Yan, Wang Hui
(Tongji Architects Co., Ltd,. Shenzhen 518057, China)Abstract: The expression of modificatory characteristic value of subgrade bearing capacity is defined in Code for design of building foundation (GB50007-2002), but it is few that the expression is applied for designing tall building projects, especially in skyscrapers projects. It gives an example of this expression applied in Shenyang Maoye Center, 292m height, board-foundation. Characteristic value of subgrade bearing capacity is 650kPa by the geological reort, but the calculation needs 760kPa. The short 110kPa is supplied by calculating modificatory characteristic value of subgrade bearing capacity. The results are beneficial to apply to the project more extensively in practical engineering.
Keywords: characteristic-value of bearing capacity modified coeffcient; embedded depth of foundation
