Method for determining dynamic coefficient of cast-in-place pile frame type roadbed structure

A technology of bored piles and dynamic coefficients, applied in infrastructure engineering, roads, roads, etc., to achieve the effect of adapting to engineering needs, clear process, and convenient implementation

Inactive Publication Date: 2018-09-25
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned cast-in-place bored pile frame subgrade structure can occupy less cultivated land, reduce the amount of filler and foundation treatment engineering, and has the characteristics of simple structure, convenient construction, high construction efficiency, and saving railway investment. How to determine the coefficient, there is no reasonable method

Method used

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  • Method for determining dynamic coefficient of cast-in-place pile frame type roadbed structure
  • Method for determining dynamic coefficient of cast-in-place pile frame type roadbed structure
  • Method for determining dynamic coefficient of cast-in-place pile frame type roadbed structure

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Experimental program
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Embodiment

[0027] refer to figure 1 , figure 2 A plain high-speed railway uses a frame-type subgrade structure of bored piles to pass through soft soil areas. The pile diameter of the bored pile 1 in this structure is 1.5m, and the pile length of the bored pile 1 below the ground is 20m. The surface height of the foundation D is 4.5m; the cross-section width×height of the beam 2 is 1.25m×1.25m, and the length is 5m, which is set above the foundation D surface and connects two bored piles 1 in the direction of the cross section; the cross-section width of the joist 3× The height is 1.5m×1.2m, the length is 10.4m, and it is set on the top of bored pile 1; The building body 5 is constructed by graded crushed stone, and is set in the groove-shaped cavity of the groove-shaped span board 4, with a thickness of 0.4m.

[0028] Adopt the method of the present invention below to determine the dynamic coefficient of this bored pile frame type subgrade structure, concrete steps are as follows:

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Abstract

The invention provides a method for determining the dynamic coefficient of a cast-in-place pile frame type roadbed structure. The method has the advantages that the dynamic coefficient of the cast-in-place pile frame type roadbed structure can be scientifically and reasonably determined, and the requirement of the engineering design and construction can be met. The method comprises the following steps of (1) determining the thickness h of a filling body, and determining the span L of a trough type bridge plate in the longitudinal direction; and (2) and determining the dynamic coefficient of the cast-in-place pile frame type roadbed structure through the following formula shown in the description. The formula is shown in the description.

Description

technical field [0001] The invention relates to the technical field of high-speed railway embankment structures, in particular to a method for determining the dynamic coefficient of a bored pile frame type embankment structure. technical background [0002] At present, the construction of high-speed railways in plain areas needs to be transported far away due to the lack of qualified fillers, and the foundation soil layer is generally deep and soft, which requires foundation treatment. The cost of roadbed fillers and foundation treatment is huge. The comprehensive cost is as high as 50-60 million yuan, which has no economic advantage compared with bridges. Therefore, when the filling height exceeds 6 meters in the plain area, "replacing roads with bridges" is often used. The "bridge-tunnel ratio" of the line remains high, and the investment in railways has increased significantly. [0003] refer to figure 1 and figure 2 , in order to solve the above problems, the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E02D27/14E01C3/04
CPCE01C3/00E01C3/04E02D27/14
Inventor 陈伟志李安洪姚裕春余雷曾永红胡会星吴沛沛龚建辉李宁郭在旭张耀陈裕刚唐第甲顾春丽孙晓
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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