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Vertical Vibration Analysis Method of Partially Buried Pile Groups in Layered Transversal Viscoelastic Soils

A technology of vertical vibration and analysis method, which is applied in the test of foundation structure, construction, foundation structure engineering, etc.

Active Publication Date: 2020-06-16
BEIJING UNIV OF TECH
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In the domestic and foreign published patent and non-patent literature retrieved this time, there is no report with the same content as the overall research and development of this project

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  • Vertical Vibration Analysis Method of Partially Buried Pile Groups in Layered Transversal Viscoelastic Soils
  • Vertical Vibration Analysis Method of Partially Buried Pile Groups in Layered Transversal Viscoelastic Soils
  • Vertical Vibration Analysis Method of Partially Buried Pile Groups in Layered Transversal Viscoelastic Soils

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Embodiment Construction

[0159] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0160] The vertical vibration analysis method of partially buried pile group in layered transverse viscoelastic soil, the implementation steps of this method are as follows,

[0161] 1.1 Dynamic governing equations of saturated soil based on Boer porous media model

[0162] The dynamic behavior of the soil around the pile is described according to the transversely isotropic saturated viscoelastic motion equation. Since the research problem is multi-layer soil, the motion equation of the k-th layer soil is expressed as

[0163]

[0164]

[0165]

[0166]

[0167]

[0168] The letter k in all variables in the formula indicates that the quantity belongs to the kth soil layer; with Represent the volume fraction of soil skeleton and pore fluid respectively, and satisfy the saturation condition with represent the bulk densi...

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Abstract

The invention discloses a vertical vibration analysis method of partially embedded grouped piles in lamellar traverse viscoelastic soil, and belongs to the technical field of ground engineering test analysis. The de Boer of the method establishes a porous medium theory based on a continuous medium mixture axiom and a volume fraction concept; and by utilizing the volume fraction concept, a plurality of microscopic properties can be described directly through a macroscopic property, and a complicated formula in a hybrid mixture theory is avoided. The porous medium theory established by the de Boer not only conforms to continuum mechanics and dynamics principles, but also has multiple advantages which are not owned by a Biot theory. In addition, the research on existed saturated soil-dynamicgrouped piles interaction mostly adopts pile-soil-pile dynamic interaction factors provided by Dobry and Gazetas, and the pile-pile dynamic interaction factors are single-phase soil, so that the adaptability of the statured soil needs to be further researched. The vertical vibration analysis method of the partially embedded grouped piles in the lamellar traverse viscoelastic soil can provide theoretical guidance and reference actions for the research on the generalized and complicated dynamic grouped piles interaction problem.

Description

technical field [0001] The invention relates to a method for analyzing the vertical vibration of partially buried pile groups in layered transverse viscoelastic soil, in particular to a method for analyzing the vertical vibration of partially buried pile groups in layered transversely isotropic saturated viscoelastic soil, belonging to Technical field of foundation engineering test analysis. Background technique [0002] At present, in actual engineering, pile foundations mostly appear in the form of pile groups. In this case, the influence of "pile group effect" must be considered. According to the retrieval, most of the studies on saturated soil-pile dynamic interaction are carried out based on the Biot saturated soil medium model. Although the Biot theory has been successfully applied in many engineering fields, the research shows that the theoretical model has certain limitations and deficiencies. For example, the most notable is that it is inconsistent with the princip...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 许成顺崔春义张石平梁志孟孟坤
Owner BEIJING UNIV OF TECH
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