Evaluation of Human Natural Conditions and Economic Activities in the Area of Proposed Construction of a Truck Haul Road

Зеликов, Владимир; Tikhomirov, P. V.; Никитин, В.В.; Skrypnikov, Aleksey; Samcov, Vadim; Burdakov, Maksim

doi:10.34220/issn.2222-7962/2020.1/24

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Затраты на возведение и эксплуатацию лесовозных дорог существенно влияют стоимости работ по заготовке древесины. Снижение затрат на возведение и содержание лесовозных дорог является весьма актуальной проблемой, особенно для строительства и эксплуатации в районах распространения переувлажненных глинистых грунтов [1,2]. К таким районам относятся значительные территории северо-запада Европейской части России и Урала.…”

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Experimental studies of reinforced clay bases of logging roads

Burmistrova,

Burgonutdinov,

Kleveko

2023

asj

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The construction and operation of logging roads often takes place in unfavorable engineering and geological conditions. Very often, clayey soils with poor physical, mechanical and strength characteristics lie in the bases of logging roads. Improving these soil characteristics is an urgent task. For this purpose, reinforcement of soil bases with the help of geotextile materials is used. Most often, a horizontal arrangement of reinforcing geosynthetic layers is used. To date, there are a large number of studies of reinforced soil structures of logging roads, but they mainly concern the use of geosynthetics in sandy soils. Research in clayey soils is not enough. Therefore, experimental studies of the operation of reinforced foundations in clayey soils were carried out. The paper presents the results of stamp tests of clay soils reinforced with horizontal reinforcing layers. The studies were carried out in two stages. At the first stage, stamp model studies were performed, which made it possible to establish the optimal designs of reinforced clay bases. Based on the results of this stage, a single-layer horizontal reinforcing layer of geosynthetic material with a tensile rigidity of 2100 kN/m, an outer diameter equal to three stamp diameters, located at a depth equal to 0.25 stamp diameters was selected. The base soil was soft plastic clay. At the second stage, field stamping tests of the reinforced and non-reinforced clay base were performed. To study the stress-strain base, pressure sensors were selected to measure vertical normal stresses and a measuring system for their registration. Vertical displacements at various points of the active zone of soil foundations were evaluated by soil marks having a wire connection with deflection meters. The results of stamp tests showed that the bearing capacity of the reinforced base is 1.5 times higher than the bearing capacity of the unreinforced base. The deformation modulus of the reinforced base is 1.18 times higher than the unreinforced base in the load range from 0 to 100 kPa. The reinforcing layer is included in the work when the precipitation of the stamp is more than 30 mm. The stress-strain state of a reinforced base has significant differences from an unreinforced one. The reinforcing layer significantly reduces vertical stresses in the upper part of the active zone of the base, by an average of 22%/. The experimental stamp tests carried out made it possible to obtain a qualitative and quantitative picture of the operation of reinforced clay bases of logging roads.

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Experimental studies of reinforced clay bases of logging roads

Burmistrova,

Burgonutdinov,

Kleveko

2023

asj

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The negative impact factor analysis to the environment from logging production on the North-West region of Russian Federation

Grafova,

Syunev,

Gorbach

2023

Forestry Engineering Journal

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Logging operations and timber transportation have a negative impact to natural and natural-anthropogenic environmental objects. Accounting, evaluation and forecasting of negative impact types will allow rational planning of technological logging operations. The negative impact degree data will allow assessing the total damage to environmental objects and, taking into account the loads of a particular work types provide for a set of protective measures adequate to the corresponding impact degree. The impact degree of types of logging activities to the environment was determined using the method of expert assessments. The variability of the nature and significance of the technogenic impact from logging and removal of wood was studied by the method of principal components. The generalized list of types of negative impact is ranked in the direction of decreasing degree as follows: pollution of water runoff and soils by leaks of fuels and lubricants, changes in biodiversity, damage to forest stands, destruction and pollution of soils, air pollution with chemical impurities, wastewater discharges into water bodies, landfill of domestic waste and discharge of effluents into the soil. When assessing biodiversity, increased attention should be paid to the organization of household and auxiliary technological processes. They are characterized by medium loads, causing pollution of water and soil by domestic and industrial effluents, and the formation of landfills for domestic and industrial waste. The construction of forest roads and work on refueling, repair and maintenance of logging equipment in workshops and fuel filling stations contribute to the manifestation of atypical impacts in the form of water and soil pollution with oil products. The obtained theoretical substantiation must be supplemented with relevant data from field studies on the identified types of negative impacts. Based on the predicted values of the degree of negative impact on the environment, the authors develop a set of scientifically substantiated technical and technological solutions that increase environmental safety during logging operations

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Evaluation of Human Natural Conditions and Economic Activities in the Area of Proposed Construction of a Truck Haul Road

Cited by 2 publications

References 4 publications

Experimental studies of reinforced clay bases of logging roads

Experimental studies of reinforced clay bases of logging roads

The negative impact factor analysis to the environment from logging production on the North-West region of Russian Federation

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