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The Method of Treating Subgrade Using Scrapped Tires Combined with Reinforcement

A technology of waste tires and sheets, which is applied in roads, roads, buildings, etc., to achieve the effects of strong water permeability, reduced active earth pressure, and low maintenance costs

Active Publication Date: 2015-09-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for treating roadbed with waste tires combined with reinforcement, which can improve the water permeability of the roadbed; increase the shear strength by increasing the internal friction angle of the soil ; At the same time, the self-weight of the soil is reduced, so that the problem of uneven settlement of the foundation is alleviated, and at the same time, the soil pressure of the retaining wall is reduced, and the subgrade structure is optimized

Method used

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  • The Method of Treating Subgrade Using Scrapped Tires Combined with Reinforcement
  • The Method of Treating Subgrade Using Scrapped Tires Combined with Reinforcement
  • The Method of Treating Subgrade Using Scrapped Tires Combined with Reinforcement

Examples

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Effect test

Embodiment 1

[0063] The backfill soil behind a gravity retaining wall is made of waste tire sheet reinforced composite material, the filling height is 5m, the waste tire sheet accounts for about 50% of the total volume of the material, and the ratio of the average weight of natural rubber to the original soil is about 1 :17, the subgrade soil weight is reduced by about 45%. Affected by the decrease of the soil's own weight and the increase of the internal friction angle, the active earth pressure of the gravity retaining wall according to Rankine's earth pressure theory is reduced by about 58% under the condition of no external load. The fill is compacted in layers, the layer thickness is 30cm, the compaction degree is greater than 95%, and the measured CBR value reaches 60%. The average permeability coefficient is 2mm / s, with high permeability. The geogrids are distributed evenly along the vertical direction, and the width of the overlap is 20cm, and the layers are staggered. The averag...

Embodiment 2

[0065] The backfill of the gravity abutment of a four-span concrete girder bridge is made of waste tire sheet reinforced composite material, and its structure is as follows figure 2 shown. Among them, the uniformly distributed geogrid 3 and the composite filling 4 composed of waste tire pieces and soil.

[0066] The proportion of waste tire pieces to the total volume of the material is about 40%, the average weight ratio of natural rubber to original soil is about 1:17, and the weight of roadbed soil is reduced by about 35%. The fill is compacted in layers, with a layer thickness of 30cm, a degree of compaction greater than 95%, and an average permeability coefficient of 1.5mm / s, with high permeability. The natural foundation is silty clay with a plasticity index of 12, excluding the additional stress of the abutment base, the foundation settlement caused by the composite fill 4 is about 2.5cm, which is less than the total settlement theory of ordinary fill foundation estima...

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Abstract

The invention discloses a method for processing a roadbed by means of matching of waste tire piece bodies and reinforced soil. The method includes the steps that (1) a waste tire is recycled and cut into pieces, soil used for the actual engineering roadbed is sampled, the recycled waste tire pieces are mixed into the soil, a triaxial compression experiment for solidification water discharging is carried out, an optimum ratio is determined according to the result of shearing strength, and accordingly the soil of the roadbed is improved; (2) geogrid is installed on a flat and compressed field, the stressed direction of the geogrid is vertical to the axis direction of a road embankment, the geogrid is pressed and fixed through plug pins, soil and stones, and the geogrid is under a tightened and stressed state in soil; (3) after the geogrid is laid and positioned, the geogrid is timely covered with soil, and the time when the geogrid is naked cannot exceed 48 hours; (4) in an reinforced soil project, water discharging must be well processed, and when necessary, geotechnical cloth should be arranged. The method can improve the water permeable performance of the roadbed; the shear-resistance is improved due to the fact that soil inner friction angles are increased; soil self-weight is reduced, the problem that the roadbed subsides unevenly is reduced, retaining wall soil pressure is reduced, and the structure of the roadbed is optimized.

Description

technical field [0001] The invention relates to a civil engineering technology, in particular to a method for treating roadbeds by using scrap tires combined with reinforcement. Background technique [0002] At present, with the vigorous development of the automobile industry, the pollution of waste tires is increasingly threatening the environment in which human beings live. As one of the largest tire producing and consuming countries, the number of scrapped tires in my country reaches 250 million every year. Its traditional treatment methods such as: incineration, landfill, stockpiling, and indigenous oil refining have not only caused a lot of waste of resources, but also brought many social problems such as environmental pollution, fire safety, and disease transmission. [0003] On the other hand, in road engineering, the roadbed exposed to the atmosphere is subjected to the joint action of soil weight, traffic load and various accidental factors, resulting in the settle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04
Inventor 崔新壮王磊楼俊杰肖溟汤潍泽张娜
Owner SHANDONG UNIV
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