Volcanic slag railway roadbed and construction method thereof

A railway embankment and volcanic slag technology, which is applied in the field of railway embankment and its construction, can solve the problems of ineffective use of excavated earth, environmental problems, and increased project cost, so as to reduce purchase and transportation costs, maintain compactness for a long time, The effect of enhancing compaction performance

Pending Publication Date: 2019-01-29
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In areas where volcanic slag is widely distributed without high-quality fillers, graded gravel or high-quality fillers of groups A, B, and C are still used to fill the roadbed, which will increase the cost of the project, and cannot effectively utilize the excavated soil, causing environmental problems

Method used

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  • Volcanic slag railway roadbed and construction method thereof
  • Volcanic slag railway roadbed and construction method thereof
  • Volcanic slag railway roadbed and construction method thereof

Examples

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Embodiment

[0032] Figure 1-3 It is shown that a specific embodiment of the present invention is a volcanic slag railway subgrade, which includes a base bed and an embankment 2 below the foundation bed. The embankment 2 is located on the foundation 1. The feature is that the subgrade is made of volcanic slag The embankment 2 is filled with volcanic slag filling, and there is a drainage filter layer 4 between the base bed and the embankment 2; and a slope is provided on the side slope of the roadbed. Surface protection structure 5.

[0033] The construction method of volcanic slag railway subgrade in this example, its steps are:

[0034] A. Foundation treatment

[0035] Compact foundation 1 so that the stability safety factor of foundation 1 is not less than 1.25;

[0036] B. Filling of embankment

[0037] Use volcanic slag filler on foundation 1 to fill embankment 2, and the clearance ratio of embankment 2 is n j ≤32%, foundation coefficient K 30 ≥90MPa / m;

[0038] C. Laying of drainage filter

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Abstract

The invention discloses a volcanic slag railway roadbed and a construction method thereof. The railway roadbed comprises a foundation bed and an embankment (2) under the foundation bed, and the embankment (2) is located on the foundation (1). The foundation bed is formed by filling with a mixed filler obtained by mixing volcanic slag with fine particles, the embankment (2) is formed by filling with a volcanic slag filler, and a drainage filter layer (4) is arranged between the foundation bed and the embankment (2); and a slope protection structure (5) is arranged on the slope of the roadbed. The roadbed is applicable to the areas with volcanic slag distributed widely, under the premise of ensuring the safety of the roadbed, the volcanic slag is utilized to the maximum extent, the purchaseand transportation cost of the fillers is greatly reduced, the engineering cost of the railway roadbed is obviously reduced, and the problem of the abandonment of the volcanic slag produced by the excavation to affect the environment is reduced and avoided.

Description

Technical field [0001] The invention relates to a railway roadbed and a construction method thereof. Background technique [0002] As an important offline infrastructure in railway engineering, subgrade should have the characteristics of sturdiness, durability and resistance to deformation to maintain the long-term smoothness of the track structure and ensure the safe and stable operation of the train. [0003] Existing railway roadbeds mostly use graded gravel with excellent mechanical properties and meet the requirements of the specification, group A gravel soil and gravel soil, group B gravel soil and sandy soil, group C block stone soil, gravel soil, and gravel soil It is filled with sandy soil and four types of high-quality fillers. In areas where volcanic slag lacks high-quality fillers and is widely distributed, the use of graded gravel or high-quality fillers of groups A, B, and C to fill roadbeds will increase the construction cost, and the excavation and spoil cannot be ...

Claims

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Application Information

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IPC IPC(8): E01B2/00
CPCE01B2/00
Inventor 罗强谢宏伟梁多伟刘钢张良蒋良潍付航魏明连继峰马宏飞
Owner SOUTHWEST JIAOTONG UNIV
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