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Pan X.-L.,Beijing University of Technology | Pan X.-L.,Beijing Engineering Consultants Ltd. | Zhang Q.-X.,Beijing University of Technology | Du X.-L.,Beijing University of Technology | And 3 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

The anchored bracing pile is more widely and more applied beyond its theory. Dynamic data of steel bar stress and horizontal displacement along piles are analyzed, and the distribution rules of internal force and deformation are gained. Based on steel bar force and section curvature, two methods to calculate bending moment along pile are deduced. Comparison between the m method and the equivalent beam method indicates that moment distribution is similar, but its numerical value is very discrepant. The m-method has the largest bending moment, and the in-situ measurement has the smallest bending moment. So the traditional design methods have large optimization space. Theoretically it can save half quantities of steel bars, which are less collocated near the central axis.

Zhang J.,Beijing Engineering Consultants Ltd | Bai C.,Beijing Engineering Consultants Ltd | Jia L.,Beijing Engineering Consultants Ltd | Wu H.,Beijing Engineering Consultants Ltd | Tan X.,Beijing Engineering Consultants Ltd
Journal of Geomatics | Year: 2011

The process of monitoring the deformation of foundation using the method of free-station is introduced. Through the application to a foundation ,we find that the method not only eliminates the influence of aligning error and disparity,but also avoids the problem of the stability of benchmarks.

Liu C.-W.,Beijing Engineering Consultants Ltd. | Han X.,Beijing Engineering Consultants Ltd.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Characteristics of some numerical simulation methods are analyzed. Based on friction and bearing piles of Wukesong large-scale serial piles foundations test in Beijing, single pile is simulated with pile structural elements of FLAC3D. By the comparisons between the measured and the simulated datas on the load deformation relationship of pile, axial forces and compression of pile shaft, shaft resistance and point resistance, the method of numerical simulation and the key mechanics parameters (coupling spring stiffness) are analyzed. So the model and parameters of pile foundations suit to Beijing area are known, and the experiences of analyzing pile foundations in Beijing are accumulated for the following projects.

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