地下连续墙竖向承载性能和承载力预测  

Bearing Behaviors and Prediction of Vertical Bearing Capacity of Deep Diaphragm Walls

作　　者：蒋建平[1] 高广运[2] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201306 [2]同济大学土木工程学院,上海200092

出　　处：《北京工业大学学报》2011年第11期1699-1705,共7页Journal of Beijing University of Technology

基　　金：国家自然科学基金项目(50878125);上海市教委科研创新项目(09YZ250);上海海事大学科研基金项目(2009160);港口;海岸及近海工程校重点学科项目(A2010030);上海市第四期本科教育高地建设项目(B210008G)

摘　　要：为在工程中充分利用地下连续墙的竖向承载力,对地下连续墙的竖向承载性能进行了初步分析,选用油气资源预测模型即俞氏增长模型,对地下连续墙荷载-沉降曲线进行了拟合,进而对其竖向承载力进行了预测.研究发现,单片的地下连续墙比同体积的圆截面混凝土桩竖向承载性能优越;俞氏增长模型与地下连续墙荷载-沉降曲线拟合精度高,拟合效果比双曲线模型、指数模型都要好,尤其在曲线的尾部.结果表明,本文提出的俞氏增长模型适应性强,对地下连续墙荷载-沉降曲线的拟合较为可靠,利用拟合方程式能对地下连续墙承载力进行预测,有助于充分利用地下连续墙的竖向承载力.To utilize the vei＇tical bearing capacity of deep diaphragm walls in actural projects, the preliminary analysis of vertical bearing behaviors, fitting of load-settlement curves with the Yushi growth model, and prediction of ultimate bearing capacity of deep diaphragm wails are carried out. It is found that the bearing performance of the single deep diaphragm wall is better than that of the circular pile with the same volume Fitting results of 6 field measurement data with the model show that the fitting precision is high, and the fitting effect with the model is better than hyperbolic and exponent models, especially at the tails of fitting curves Conclusions can be drawn that the vertical bearing capacity of deep diaphragm walls should be utilized adequately; the Yushi growth mathematical model has good adaptability and is accurate and credible for fitting of load-settlement curves of deep diaphragm vertical bearing capacity of deep diaphragm walls; and corresponding fitting equations can be used to forecast walls.

关 键 词：俞氏增长模型 荷载-沉降曲线 地下连续墙 

分 类 号：TU443[建筑科学—岩土工程]