Optimization design method for large-span skewback composite foundation

An optimization design, composite foundation technology, applied in design optimization/simulation, constraint-based CAD, arch bridges, etc., can solve problems such as uneven force distribution and low design efficiency

Active Publication Date: 2021-09-14
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies in the low design efficiency of the design method of the composite pile foundation of the large-span arch bridge in the prior art, and the uneven force distribution of each part of the force-bearing surface of the pile group, the transverse pile, and the bottom of the abutment, and provide a Optimal Design Method of Long-span Abutment Composite Foundation

Method used

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  • Optimization design method for large-span skewback composite foundation
  • Optimization design method for large-span skewback composite foundation
  • Optimization design method for large-span skewback composite foundation

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Embodiment 1

[0028] An optimal design method for a long-span abutment composite foundation, comprising the following steps:

[0029] a. According to the superstructure design, constraint boundary conditions, geological conditions and engineering experience, the preliminary design parameters of the abutment structure are determined. The preliminary design parameters include the axial force of the abutment top, the gap between the axial force of the abutment top and the vertical direction Angle, bending moment at the top of the abutment, transverse width of the abutment, height of the abutment, length of the bearing surface at the bottom of the abutment, axial force of the bearing surface at the bottom of the abutment, the angle between the bearing surface at the bottom of the abutment and the horizontal direction, and the abutment The allowable stress of the foundation at the bottom, the number of foundations of the pile group, the length of the pile foundation of the pile group, the allowab...

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Abstract

The invention provides an optimization design method for large-span skewback composite foundation. By determining boundary conditions and solving variables, the basic design composition of the composite foundation structure can be rapidly determined, the design process is greatly reduced, the design period is shortened, and by means of extreme value solving, the minimum amount of masonry of the foundation is guaranteed as the limit, all the parts share external force according to allowable stress, stress distribution of all the parts is uniform, the utilization rate is high, and therefore project investment is reduced. According to the invention, the design method can guarantee design precision, and compared with the prior art, the design method is more practical and wide in applicability and has great popularization significance and application prospects.

Description

technical field [0001] The invention belongs to the technical field of abutment foundation design and relates to an optimal design method for a long-span abutment composite foundation. Background technique [0002] The abutment foundation is the main force-transmitting and load-bearing component of the arch bridge. According to the foundation form, it can be divided into open-cut foundation, embedded foundation and composite pile foundation. The foundation form of the abutment is selected by the structural form of the arch bridge, the topography of the bridge site, and the geological conditions. A reasonable foundation form of the abutment can ensure the safety of the structure and construction, and reduce the project cost. Among them, the composite pile foundation is often used in the design of long-span arch bridges (span greater than or equal to 200m) due to its strong adaptability to geological conditions and ease of construction. [0003] The composite pile foundation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20E01D4/00G06F111/04G06F119/14
CPCG06F30/13G06F30/20E01D4/00G06F2119/14G06F2111/04
Inventor 陈克坚戴胜勇李恒陈建峰张志勇刘忠平袁蔚向律楷彭福兵刘和亮
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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