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Method for filling highroad roadbed by waste steel slags

A technology for filling roadbeds and steel slags, applied in roads, excavations, roads, etc., can solve problems such as lack of perfect methods, and achieve the effects of promoting environmental protection, stable and reliable roadbeds, and low cost

Inactive Publication Date: 2009-01-14
CCCC SECOND HIGHWAY CONSULTANTS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People are using scrap steel slag to fill road embankments, especially road embankments, and there is no perfect method

Method used

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  • Method for filling highroad roadbed by waste steel slags
  • Method for filling highroad roadbed by waste steel slags
  • Method for filling highroad roadbed by waste steel slags

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with accompanying drawing.

[0040] A method for filling road subgrades with steel scrap slag, the steps of which are:

[0041] a. Selection of steel slag for roadbed filling

[0042] Subgrade engineering has strict requirements on the quality of filling materials. Problems such as the expansion and pulverization of steel slag will endanger the safety of the subgrade. Therefore, various indicators of steel slag must be strictly controlled:

[0043] (1) New slag must not be used or mixed in, and scrap steel slag stored for more than one year should be used. The maximum particle size of the steel slag used for filling the roadbed should not be greater than 40mm (square hole), and the content of particles with a particle size greater than 20mm should not exceed 40%. The recommended grading range in Table 1 should be adopted. Coarse material concentration and overhead phenomenon shall not occur during f...

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Abstract

The invention discloses a method for building a highway road bed with waste steel residues. The method comprises the steps: firstly, waste steel residues are adopted to build the road bed; secondly, the building speed of the road bed built with waste steel residues is required to be controlled to guarantee the road bed stability; thirdly, the road embankment built with waste steel residues is compacted by a vibratory road leveling machine in layers, during the compacting, the waste steel residues shall be in the optimum moisture content scope, through the trial road section method, the appropriate compacting machines and tools are determined, and the maximum dry density and the optimum moisture content are adopted as the compaction degree calculating standard in the road bed built with waste steel residues; and fourthly, the cross section design of the waste steel residue road embankment comprises the road embankment height, the side slope ratio of the road embankment, the building layer thickness, a top sealing layer, a bottom sealing layer, an intercalated layer, the slope protection and a drainage system. The invention has the advantages that the method is easy, the operation is convenient, the waste steel residue piling ground and the environmental pollution are reduced, the wastes are changed into valuables, the environmental protection is promoted, the method solves the problem that the highway engineering packing material is inadequate, the cost is low, and the quality of the built road bed can satisfy the construction requirements of the road bed of the higher grade highway.

Description

technical field [0001] The invention relates to filling road subgrades, and more particularly relates to a method for filling road subgrades with scrap steel slag. Background technique [0002] In the construction of road subgrade filling, using waste steel slag to fill road subgrade is a new method, which can reduce steel slag storage sites and environmental pollution, turn waste into treasure, promote environmental protection, solve the problem of insufficient filling in highway engineering, and reduce project cost . [0003] In the 1960s, the municipal department of Shanghai used converter slag to test road paving. However, since the steel slag was not treated at that time, the free calcium oxide f-CaO and magnesium oxide MgO in the steel slag were relatively high, resulting in a decrease in the volume of the filling body. Instability limits the application of steel slag in roads. In 1988, WISCO carried out experimental research work on WISCO steel slag as foundation ba...

Claims

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Application Information

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IPC IPC(8): E01C3/00E02D17/20
Inventor 余泽新胡春林胡义德胡胜刚余良德陈中学方仁印涂万堂熊伟芬
Owner CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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