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Serialized Typical Design Diagram and Design Method of Excavation and Excavation Foundation for Transmission Lines

A technology for excavating foundations and design methods, applied in infrastructure engineering, calculation, electrical digital data processing, etc., can solve problems such as manual addition of construction design instructions, unreasonable size of base expansion, and no construction design instructions, etc. Construction production template and mechanized construction requirements, shorten the design cycle, the effect of rigorous preparation process

Active Publication Date: 2017-11-14
YICHANG ELECTRIC POWER SURVEY & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the drafting specification stipulates that the contour line in the structural reinforcement drawing should be a thin solid line, and the steel bar should be a thick solid line, but the contour line of the structural drawing generated by "Daoheng" is a thick solid line, which leads to confusion between the contour line and the steel bar, and the steel bar label is not correct. Specifications, there is no detailed construction design instructions to guide and standardize construction, and manual addition of construction design instructions is required
In addition, the function of the software to automatically optimize the size of the bottom expansion of the foundation is often unsatisfactory, and sometimes even the result of the bottom expansion of the base is very unreasonable. The excavation and excavation of the foundation with the same load and foundation conditions are carried out by different designers using Daoheng software. When designing, the amount of material used will vary greatly

Method used

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  • Serialized Typical Design Diagram and Design Method of Excavation and Excavation Foundation for Transmission Lines
  • Serialized Typical Design Diagram and Design Method of Excavation and Excavation Foundation for Transmission Lines
  • Serialized Typical Design Diagram and Design Method of Excavation and Excavation Foundation for Transmission Lines

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0064] For a straight tower, the design value of the uplift load at the tower foot is: T E =320kN, lateral load H x =30,H y = 3, the foundation condition is soft plastic cohesive soil, the characteristic value of foundation bearing capacity f k = 80kPa.

[0065] Solution: Make sure the grade of foundation soil is 2, the type of reinforcement is 2Z, and the straight tower γ f = 1.1, γ f T E =352, lateral load force H E =(30 2 +3 2 ) 1 / 2 =30.2, the lateral force is less than 0.1 times the design value of the pull-out force (0.1×320=32), which meets the requirement of directly checking the manual and selecting the basic diagram.

[0066] Choose the base diameter of 1.0 meters, corresponding to row 2Z, choose TW1035 / 03 / 6-2Z type, T=353kN,

[0067] gamma f T E

example 2

[0069] The design value of the uplifting load on the corner tower foot is: T E =1200kN, lateral load H x =120,H y =80, the foundation condition is dense silty clay, the characteristic value of foundation bearing capacity f k = 200kPa.

[0070] Solution: Determine that the grade of foundation soil is 5, the type of reinforcement is 5J, and the corner tower γ f = 1.6, γ f T E =1920, lateral load resultant force H E =(120 2 +80 2 ) 1 / 2 =144.2, the lateral force is less than 0.15 times the design value of the pull-out force (0.15×1200=180), which satisfies the need to directly check the table and select the basic map.

[0071] Choose base body diameter 1.0m, corresponding row 5J, choose TW1065 / 03 / 7-5J type, T=2020kN.

[0072] gamma f T E

example 3

[0074] The design value of the uplifting load at the tower foot is: T E =846kN, lateral load H x =10,H y =80, the foundation condition is plastic clay, and the characteristic value of foundation bearing capacity f k = 150kPa.

[0075] Solution: Determine the grade of the foundation soil as 3.5, choose 4X for the reinforcement model, and select the corner tower γ f = 1.3, γ f T E =1100, lateral load resultant H E =(10 2 +80 2 ) 1 / 2 =80.6, the lateral force is less than 0.12 times the design value of the pull-out force (0.12×846=101.5), which satisfies the need to directly look up the table and select the map.

[0076] Choose the base diameter of 1.0m, corresponding to row 4X, use the interpolation value between 3X and 4X, choose the average value of TW1055 / 03 / 7-3X and TW1055 / 03 / 7-4X, T=(1007+1218) / 2=1113kN ,

[0077] gamma f T E

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Abstract

The invention discloses a serialized typical design drawing and design method of excavated foundations of transmission lines. The design method adopts a reverse design mode, that is, the foundation load is unknown, and the cohesive soil foundation conditions are first divided into 6 grades, and then a series of models are assumed Dimensions of excavated and excavated foundations, and calculate the uplift bearing capacity under various foundation conditions, and then make a typical design drawing. When selecting, you only need to find a typical foundation model that meets the foundation conditions according to the foundation conditions. The typical design foundation model whose pull-out capacity is slightly greater than or equal to the pull-out load on the foundation. The invention provides serialized typical design drawings of excavation foundations for designers to directly select in the design of excavation foundations, which can improve design efficiency, shorten design cycle, and effectively improve the quality of drawings.

Description

technical field [0001] The invention relates to a design method for digging foundations of transmission lines. More specifically, it provides serialized typical design drawings for direct selection by designers in the design of digging foundations for transmission lines. Background technique [0002] Excavated foundations have been widely used in transmission line projects in my country, and the uplift bearing capacity of foundations is usually calculated according to the "shear method" in "Technical Regulations for Foundation Design of Overhead Transmission Lines" DL / T5219-2005, [Note: The national power industry has promulgated a new technical regulation "Technical Regulations for Foundation Design of Overhead Transmission Lines" DL / T5219-2014]. [0003] The uplifted foundation is a special foundation, which is rarely used in general engineering, so there are very few people in China who do research on this kind of foundation. The foundation of the self-supporting iron tow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06F19/00E02D27/42
Inventor 陆文全
Owner YICHANG ELECTRIC POWER SURVEY & DESIGN INST