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Method for calculating vertical ultimate bearing capacity and reduction coefficient of bridge pile foundation in karst area

A technology of ultimate bearing capacity and reduction coefficient, applied in electrical digital data processing, design optimization/simulation, CAD numerical modeling, etc., can solve the problems of not considering the degree of end resistance, hidden dangers of road and bridge safety, large calculation results, etc. , to achieve the effect of avoiding construction cost, avoiding unreasonable and high precision

Pending Publication Date: 2022-03-22
CHANGAN UNIV
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Problems solved by technology

At present, there is no calculation method for the vertical ultimate bearing capacity when there is a karst cave around the pile in the bridge pile foundation. If the design calculation is carried out according to the bearing capacity calculation formula of conventional rock-socketed piles in the current code method, the pile side within the depth of the karst cave is simply ignored. Resistance, regardless of the difference in the degree of end resistance, the calculated result is too large, causing hidden dangers and threats to the safety of highway bridges

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  • Method for calculating vertical ultimate bearing capacity and reduction coefficient of bridge pile foundation in karst area
  • Method for calculating vertical ultimate bearing capacity and reduction coefficient of bridge pile foundation in karst area
  • Method for calculating vertical ultimate bearing capacity and reduction coefficient of bridge pile foundation in karst area

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[0039] In order to make the purpose and technical solution of the present invention clearer and easier to understand. The present invention will be further described in detail below in conjunction with the drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040]In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orie...

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Abstract

The invention discloses a karst area bridge pile foundation vertical ultimate bearing capacity and reduction coefficient calculation method, which fully considers five factors having the maximum influence on the bridge pile foundation vertical ultimate bearing capacity, adopts a test method to comprehensively analyze the bridge pile foundation bearing capacity under various working conditions, and calculates the reduction coefficient based on the analysis result. After the influence of the karst cave on the pile side resistance and the influence of the karst cave on the pile end resistance are comprehensively considered, the bearing capacity of the bridge pile foundation is calculated, and the obtained pile foundation bearing capacity is safer compared with a result calculated through a standard method. Meanwhile, test and numerical simulation results are met as much as possible in the calculation process, the precision is high, and the phenomenon that the construction cost is unreasonable is avoided.

Description

technical field [0001] The invention belongs to the technical field of bearing capacity of bridge pile foundations in civil engineering, and in particular relates to a calculation method for the vertical ultimate bearing capacity and reduction coefficient of bridge pile foundations in karst areas. Background technique [0002] With the continuous improvement of my country's highway network, it is inevitable to build highway bridges in karst development areas, but karst development will lead to damage to the integrity of rocks, greatly reducing the stability, strength and bearing capacity of rock formations, so in karst areas When building bridges and other structures, engineering disasters such as ground subsidence, hole collapse, and slurry leakage often occur, which brings great challenges to the construction of engineering projects. Due to the concealment and complexity of karst, pile foundations are often used as bridge foundations in karst areas. The stress and deformati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/23G06F111/10G06F119/14
CPCG06F30/20G06F30/23G06F2119/14G06F2111/10
Inventor 冯忠居陈慧芸李铁夏承明王鹏超蔡俊华武敏江冠白少奋全超文黄骤屹郭穗柱王伟
Owner CHANGAN UNIV
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