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11Oriental Renaissance: Innovative, educational, natural and social sciences
Scientific Journal Impact Factor
VOLUME 1 | ISSUE 5 ISSN 2181-1784 SJIF 2021: 5.423
TECHNOLOGY OF PRODUCTION OF EARTH WORKS WITH THE APPLICATION OF GEOGRAPHS
Kurbanov Zavkiddinjon Khamidulloevich, Jizzax Polytechnic Institute, assistant
Abdusamatov Kamol Begalievich Jizzax Polytechnic Institute, teacher Kholboev Sanjarbek, student Department of "Building Materials and Structures" E mail: zavaclash@gmail.com
Annotation. The main purpose of using GM is to ensure the reliable operation of the road or its individual elements in difficult conditions of construction and operation. The device of additional layers of GM allows to increase the operational reliability and service life of the structure or its individual elements, the quality of work, to simplify the construction technology, to reduce the construction time, to reduce the consumption of traditional building materials, the volume of earthworks, and the material consumption of the structure.
Key words and phrases: pavement, pavement, subgrade, embankment base, geosynthetic, heaving soil, basalt.
Аннотация: Основная цель использования GM - обеспечение надежной работы дороги или отдельных ее элементов в сложных условиях строительства и эксплуатации. Устройство дополнительных слоев ГМ позволяет повысить эксплуатационную надежность и срок службы конструкции или отдельных ее элементов, качество работ, упростить технологию строительства, сократить сроки строительства, снизить расход традиционных строительных материалов, объем земляных работ и материалоемкость конструкции.
Ключевые слова и фразы: тротуар, тротуар, земляное полотно, основание насыпи, геосинтетический, пучинистый грунт, базальт.
Domestic and foreign experience in the use of geosynthetic materials shows their versatility (a wide field of application), efficiency (reduction in construction and operation costs, savings in construction materials, reduction in the time of work, increase in turnaround times), environmental friendliness.
All decisions related to the use of geosynthetic materials should be based on design solutions developed taking into account the relevant documents.
INTRODUCTION
Oriental Renaissance: Innovative, R VOLUME 1 | ISSUE 5
educational, natural and social sciences O ISSN 2181-1784
Scientific Journal Impact Factor SJIF 2021: 5.423
DISCUSSION AND RESULTS
Geonets made of basalt fiber grade SBNP produced according to STO 5952004-98214589-2011 are recommended to be used as reinforcing layers in the construction of roads, airfields, sites for various purposes and in other geotechnical structures.
These materials are used in the following types of construction work:
- construction of embankments on weak foundations (clayey soils, swamps of all types, soils of high humidity, waterlogged peat and in permafrost conditions);
- construction of temporary roads;
- construction of highways of all categories;
- construction of railway tracks (strengthening of the under-ballast layer);
- construction of airfields (runways, taxiways and parking areas);
- arrangement of well pads;
- construction of sites for high loads;
- device for widening the carriageway;
- construction of reinforced soil retaining structures;
- construction of access roads to main pipelines;
- construction of access roads to small artificial structures;
- construction of main pipelines;
- construction of waste disposal facilities.
The characteristics of permafrost soils, the conditions for their use and methods of development must comply with VSN 84-89 "Research, design and construction of highways in the areas of permafrost.
Table 1
Geogrid requirements
Norm for geogrids
The name of indicators CEHn-20 CEHn-50 CEHn-50 CEHn-100
(5)-400 (25)-400 (50)-400 (50)-400
Breaking load, kN / m, not
less: longitudinal threads 20 50 50 100
transverse threads 20 50 50 100
Elongation at break,% no
more: along the 4,0 4,0 4,0 4,0
longitudinal threads along 4,0 4,0 4,0 4,0
the transverse threads
Scientific Journal Impact Factor SJIF 2021: 5.423
Loss of strength when testing frost resistance (50 freeze-thaw cycles),%, no more 10 10 10 10
Cell sizes, mm 5x5 25x25 50x50 50x50
Width, sm 400 400 400 400
Embankment on soft soils and type I swamps with peat thickness up to 3 m Construction №1
Weak soils_
Geogrid CEHn-20 (5)-400_
Embankment body soil
Note:
1. The geogrid is laid out perpendicular to the axis of the road with an overlap of 0.4-0.5 m and an outlet size of 0.5 m;
2. The minimum height of the embankment is determined on the basis of the condition of snow resistance, elevation of the top of the pavement above the surface water level and frost resistance of the pavement;
3. The embankment in the lower part by the amount of settlement plus 0.5 m is erected from drainage soils;
4. The amount of settlement of the embankment and the rate of consolidation is determined by calculation. The cover is arranged after the completion of the design settlement;
5. The steepness of the embankment slopes is taken for roads of I-III categories with an embankment height of up to 3 meters equal to 1: 4, for roads IV -V categories - 1: 3, in other cases 1: 2.
Scientific Journal Impact Factor SJIF 2021: 5.423
Construction №2
B
Weak soils_
Geogrid CEHn-20 (5)-400_
Embankment body soil
Geogrid CEHn-20 (5)-400_
Embankment body soil_
Geogrid CEHn-20 (5)-400_
]<y0je. Embankment body soil_
1. The geogrid is laid out perpendicular to the axis of the road with an overlap of 0.4-0.5 m and an outlet size of 0.5 m;
2. The minimum height of the embankment is determined on the basis of the condition of snow resistance, elevation of the top of the pavement above the surface water level and frost resistance of the pavement;
3. The amount of settlement of the embankment and the rate of consolidation is determined by calculation. The cover is arranged after the completion of the design settlement;
4. The steepness of the embankment slopes is taken for roads of I-III categories with an embankment height of up to 3 meters equal to 1: 4, for roads IV -V categories - 1: 3.
Before dumping the soil, the quality of the laid material is checked by visual inspection and fixing the continuity, the size of the overlap, the quality of the joining of the canvases. Based on the results of the inspection, an act for hidden work is drawn up, which contains the results of the inspection, data on the supplier and the characteristics of the geogrid used, indicated in the passport for the batch or on the labels of the rolls, as well as the data obtained when the geogrid was accepted by the contractor's laboratory.
CONCLUSION
To calculate the stability of the embankment on a weak foundation using reinforcing layers made of geosynthetic materials, it is necessary to preliminarily assess the stability without reinforcement within the framework of two design schemes - for the construction stage and in the final state, when the consolidation process is completed.
Oriental Renaissance: Innovative, R VOLUME 1 | ISSUE 5
educational, natural and social sciences О ISSN 2181-1784
Scientific Journal Impact Factor SJIF 2021: 5.423
If, according to the initial initial calculations, stability is not ensured, it is necessary to provide for the use of geosynthetic reinforcing layers to increase the stability of the embankment on a weak foundation due to their tensile strength and friction forces in contact with the surrounding soil.
BIBLIOGRAPHY
1. СНиП 2.05.02-85. Автомобильные дороги. Нормы проектирования. М.-1986,52с.
2. ВСН 84-89. Изыскания, проектирование и строительство автомобильных дорог в районах распространения вечной мерзлоты.
3. СТО 00243240-001-2011 Геосетки из базальтоволокна марки СБНП.
4. ГОСТ 25100-95. Грунты. Классификация.
5. Пособие по проектированию земляного полотна автомобильных дорог на слабых грунтах. фда министерства транспорта России. Информавтодор. М.-2004., 252 с.
6. ОДМ. Рекомендации по применению геосинтетических материалов при строительстве и ремонте автомобильных дорог. Росавтодор. М.-2003.
7. ОДН 218.046-01. Проектирование нежестких дорожных одежд. Росавтодор. Минтранспорта России. Информавтодор. М.-2001., 145 с.
8. СНиП 3.06.03-85. Автомобильные дороги. Организация, производство и приемка работ. М.-1986., 112 с
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