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A method for improving soil subgrade construction access road

A technology for construction access roads and soil improvement, applied to roads, roads, buildings, etc., can solve the problems of high maintenance costs, wet subgrade access roads and difficulty in rainy season, and achieve the effect of improving efficiency

Active Publication Date: 2017-07-04
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing construction access roads in tropical rainforest areas, and to provide a method for improving soil roadbed construction access roads, which can effectively solve the shortcomings of difficult passage and high maintenance costs in wet subgrade access roads in tropical rain forest areas.

Method used

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  • A method for improving soil subgrade construction access road

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Ordinary yellow clay 15%, graded bone material 75%, silty material 10%, compaction 97.5%, water content 15%, strength 415Kpa, water seepage thickness 7cm.

Embodiment 2

[0025] Example 2: 17% ordinary yellow clay, 70% graded bone material, 13% silty material, 97% compaction, 17% water content, 420Kpa strength, and 5cm water seepage thickness.

Embodiment 3

[0026] Example 3: 20% ordinary yellow clay, 65% graded bone material, 15% silty material, 94% compaction, 19% water content, 410Kpa strength, and 4cm water seepage thickness.

[0027] The road upgrade project from Mizan to Dima in Ethiopia adopts the present invention to carry out the roadbed construction access road construction, and a total of 43 kilometers of access roads have been completed. Referring to the construction in other unimproved access road areas, the access road construction fee is 23,000 yuan / km, and the access road maintenance fee is 7,500 yuan / km, because the access road can only exert 25% efficiency in the rainy season. Use the technology of the present invention to invest 25,000 yuan / km in access road construction costs, 2,400 yuan / km in access road maintenance costs, and access roads can bring into play 100% efficiency in the rainy season. The entire Mizan-Dima project in Ethiopia saved a construction period of 180 days, saved equipment idle costs of 2.8...

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Abstract

The invention discloses a technology for constructing sidewalks on a roadbed by using improved soil. The technology comprises the steps of preparation of composite material, soil improvement test and large-scale construction of sidewalks. The composite material comprises 15-20% of a common yellow clay soil material, 65-75% of a grading framework material and 10-15% of a powdery material. The method concretely comprises the following steps: 1, verifying the chemical performances of the above materials; 2, pre-mixing to obtain the composite material; 3, carrying out improvement test on the soil material on sidewalks to be built; 4, carrying out sidewall test section detection; 5, carrying out water immersion test on sidewalk test sections; and 6, carrying out large-scale construction of the improved soil sidewalks. The technology effectively overcomes the disadvantages of difficult pass and high maintenance cost of collapsible roadbed sidewalks in tropical rain forest regions, and improves the efficiency of construction in rainy seasons.

Description

technical field [0001] The invention relates to the technical field of highway engineering construction, in particular to a method for improving soil roadbed construction access roads, which is suitable for the construction of collapsible roadbed construction access roads in tropical rain forest areas, and is also suitable for filling special collapsible loess roadbeds. Background technique [0002] With the transfer of domestic excess capacity, there are more and more overseas construction projects. We need to face various complex and harsh construction environments. Especially in the subgrade area of ​​tropical wetlands, the construction is very difficult, and the rainy season is very long, the liquid limit of the subgrade soil is high, the soil expansion rate is large, and the production of materials is affected by the rainy season and cannot be produced. The biggest difficulty in construction in the rainy season in the collapsible loess subgrade area is that the constru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04
Inventor 江勇
Owner CHINA MCC17 GRP