Pressure box-type high-speed railway bed structure and construction method

A high-speed railway and construction method technology, applied in the field of geotechnical engineering, can solve the problems of high subgrade construction cost, precious farmland, lack of high-quality fillers, etc. Effect

Active Publication Date: 2018-06-05
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, plain areas usually lack high-quality fillers, and farmland is precious
In the construction of high-speed railways in plain areas, if bridges are used to replace traditional roadbeds, the investment will be huge; if roadbeds are built, they will face the problems of lack of high-quality fillers, wide land use, and difficult drainage. Reinforcement measures are taken for the soil foundation, so the cost of roadbed construction is also high

Method used

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  • Pressure box-type high-speed railway bed structure and construction method
  • Pressure box-type high-speed railway bed structure and construction method
  • Pressure box-type high-speed railway bed structure and construction method

Examples

Experimental program
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Effect test

Embodiment

[0032] Take a ballastless track high-speed railway embankment project as an example.

[0033] 1. The traditional embankment structure is adopted, the filling height is 7m, the thickness of the foundation soil layer is 15m, the length of the embankment is 500m, and the transportation distance of high-quality filler is 50Km (including graded gravel on the surface of the subgrade, the average price is about 160 yuan / m 3 ), and the land use cost is 150,000 yuan / mu. Filling section square 171.5m 2 , the foundation is treated with CFG piles, the treatment width is 35m, the depth is 15mm, the pile spacing is 1.6m, the land width is 45m, the slope protection cost is 800 yuan / m, and the cross-sectional area of ​​the drainage ditch is 1.3m 2 . The estimated cost of subgrade works is as follows:

[0034] Packing price: 171.5m 2 *500m*160 yuan / m 3 = 13.72 million yuan;

[0035] Foundation CFG pile engineering cost: 35m*500m*15m / 1.6m / 1.6m*140 yuan / m=14.356 million yuan;

[0036] Lan...

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PUM

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Abstract

The invention discloses a pressure box-type high-speed railway bed structure and a construction method so as to effectively reduce the cost of building high-speed railway beds in flat areas and reducethe land occupied by railway beds to the maximum. Reinforced concrete box body segments are continuously arranged on a foundation in the line direction, and expansion joints are arranged between theend faces of the adjacent reinforced concrete box body segments; each reinforced concrete box body segment is formed by a bottom plate, a left vertical arm wall, a right vertical arm wall, a top plateand the two longitudinal end plates which are fixedly connected into a whole and form a closed box section, wherein the top plate is the foundation of a track system. A flexible airbag is placed in the inner cavity of each reinforced concrete box body segment, or a sealing structure is arranged to form a closed cavity; an air inlet pipe communicated with the corresponding flexible airbag or the corresponding closed cavity is fixedly arranged on each left vertical arm wall or each right vertical arm wall.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a pressure-type box-type high-speed railway subgrade structure and a construction method, which are used for high-speed railway subgrade construction projects in plain areas lacking high-quality fillers. Background technique [0002] Railway subgrades are usually filled with fillers of certain specifications. The top surface of the embankment is the foundation of the track system. Drainage ditches are set outside the slopes on both sides of the embankment. The subgrade covers a large area. Fillers have very strict requirements. However, plain areas usually lack high-quality fillers, and farmland is precious. In the construction of high-speed railways in plain areas, if bridges are used to replace traditional roadbeds, the investment will be huge; if roadbeds are built, they will face the problems of lack of high-quality fillers, wide land use, and difficult drainage. Reinforcement me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00
CPCE01B2/00
Inventor 姚裕春李安洪余雷刘洋魏永幸肖朝乾曾永红庞应刚
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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