The Soil Compaction Process and Methods of Measurement

1971 ◽  
Author(s):  
E. T. Selig
Keyword(s):  
Soil Compaction ◽  
Compaction Process ◽  
Methods Of Measurement

scholarly journals The Dynamic Response of the Vibrating Compactor Roller, Depending on the Viscoelastic Properties of the Soil

2020 ◽  
Vol 3 (2) ◽  
pp. 25
Author(s):  
Cornelia Dobrescu
Keyword(s):  
Dynamic Response ◽  
Soil Compaction ◽  
Viscoelastic Properties ◽  
Dynamic Effect ◽  
Pulse Response ◽  
Compaction Process ◽  
Response Curves ◽  
Soil Layers ◽  
Transmitted Force ◽  
Practical Engineering

The present paper addresses the problem of the dynamic response of a vibrating equipment for soil compaction. In essence, dynamic response vibrations are analysed by applying an inertial-type perturbing force. This is generated by rotating an eccentric mass with variable angular velocity, in order to reach the regime necessary to ensure the degree of compaction. The original character of the research is that during the compaction process, the soil layers with certain compositions of clay, sand, water and stabilizing substances change their rigidity and/or amortization. In this case, two situations were analysed, both experimentally and with numerical modelling, with special results and practical engineering conclusions, favourable to the evaluation of the interaction between vibrator roller–compacted ground. We mention that the families of amplitude–pulse and transmitted force–pulse response curves are presented, from which the dynamic effect in the compaction process results after each passage on the same layer of soil, until the necessary compaction state is reached.

DEVELOPMENT OF A HYBRID SOIL PRESSURE SENSOR AND ITS APPLICATION TO SOIL COMPACTION

2020 ◽  
Author(s):  
Mark Talesnick ◽  
Moti Ringel ◽  
Kyle Rollins
Keyword(s):  
Pressure Sensor ◽  
Soil Compaction ◽  
Compaction Pressure ◽  
Confining Pressure ◽  
Soil Pressure ◽  
Compaction Process ◽  
Vibratory Compaction ◽  
Soil Strain ◽  
The Relationship

A new soil pressure sensor based on a combination of the deflecting membrane and fluid filled approaches has been developed. The advantages of this combined approach are that issues of sensor compliance are eliminated without reducing the effectiveness of the sensor to be used for dynamic measurements. Calibration and verification testing performed under controlled laboratory conditions illustrate these benefits. The new system was implemented in a full-scale field trial which involved the construction of a compacted engineered fill 1.8 m in height. As each layer of fill was placed and compacted vertical in-soil pressure and vertical in-soil strain were continuously measured. During the vibratory compaction process both vertical soil pressure and vertical soil strain histories were captured in each layer. The data collected allowed for the determination of fill stiffness for both static and dynamic conditions. The results illustrate the effect of both confining pressure and strain level on fill stiffness. The relationship between compaction pressure and depth is clearly defined.

scholarly journals Computer modeling of the process of soil sealing under the pipeline

2021 ◽  
pp. 191-197
Author(s):  
Mykola Kuzminets ◽  
Keyword(s):  
Computer Simulation ◽  
Computer Modeling ◽  
Soil Compaction ◽  
Strain State ◽  
Main Pipeline ◽  
Working Process ◽  
Compaction Process ◽  
Stress Strain ◽  
Soil Sealing ◽  
Qualitative Picture

In the article, using computer simulation in Ansys environment, the working process of replacement equipment of a single-bucket excavator for soil compaction under the pipeline is investigated and the influence of working equipment parameters on the qualitative picture of soil compaction process and change of stress-strain state of main pipeline and soil is evaluated.

scholarly journals Determination of technological parameters of soil compacting process

2020 ◽  
pp. 3-15
Author(s):  
V. A. Basarab
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Differential Equations ◽  
Fourier Analysis ◽  
Soil Properties ◽  
Soil Compaction ◽  
Technological Parameters ◽  
Compaction Process ◽  
Properties Of Soil

The article is devoted to determine the technological parameters of soil compaction by rollers according to soil properties in construction. The compaction of the soil occurs due to certain force loads on the soil. Nowadays, there are enough methods to determine the technological parameters of soil compaction process, however, there are few research methods that consider the system of soil-machine-technological parameters. The urgency of the soil compaction process, which ultimately determines the quality of construction products, was emphasized. The basic physical and mechanical properties of soil and technological parameters of the compaction process were given. Analysis of discrete mathematical model of interaction between roller and soil was carried out in order to determine the technological parameters of soil compaction process in the field of construction technologies. A rheological model to describe the soil properties was used. The differential equations of the interaction between roller and soil have been made. A numerical calculation method to solve the differential equations has been proposed. The basic technological parameters of soil compaction process by rollers have been determined - the thickness of soil layer to be compacted, the number of the roller passes, and the speed of the roller movement. The methodology of theoretical and experimental researches of interaction between roller and soil has been proposed in order to clarify the mathematical model and to find the technological parameters of the compaction process. Experimental research methods are based on the determination of the stress-strain state of soil and on the Fourier analysis of the experimental data. Fourier analysis of the experimental data makes it possible to analyze the qualitative energy spectrum of the interaction between roller and soil to determine the rational amplitude-frequency characteristics of the compaction process. Experimental studies allow obtaining such rheological properties of soil as elasticity, viscosity, coefficient of elastic resistance, etc. The main recommendations for the choice of compaction method depending on the type of soil have been proposed.

scholarly journals Mathematical modeling for the technological process of surface soil compaction by the inertial vibratory rammer

2019 ◽  
Vol 1 (52) ◽  
pp. 21-29
Author(s):  
Yaroslav Ivanchuk
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Numerical Modeling ◽  
Technological Process ◽  
Soil Compaction ◽  
High Efficiency ◽  
Surface Soil ◽  
Compaction Process ◽  
High Degree

The high efficiency of the technological process of surface soil compaction using vibration and vibro-impact treatment hasbeen determined. High degree intensification of the soil compaction process is achieved by using original inertial vibratoryrammers with a hydro-pulse drive. A new mathematical model has been developed for the surface soil compaction processesstudy by the inertial vibratory rammers. Using numerical modeling, work dependencies are obtained to determine the mainoperating characteristics for the technological process of surface soil compaction by inertial vibratory rammers based on ahydro-impulse drive.

scholarly journals Research of soil compaction process in area of contact with a wheel mover

2021 ◽  
Vol 2094 (4) ◽  
pp. 042003
Author(s):  
G E Kokieva ◽  
I P Troyanovskaya ◽  
A A Orekhovskaya ◽  
M N Kalimullin ◽  
A-M S Dzjasheev ◽  
...  
Keyword(s):  
Contact Surface ◽  
Soil Compaction ◽  
Soil Depth ◽  
Agricultural Technology ◽  
Compaction Process ◽  
Wheel Load ◽  
Radial Stiffness ◽  
Reduce Energy Consumption ◽  
Agricultural Machines

Abstract Practice of operating heavy wheeled machines (T-150K, K-700, K-701) and experimental data show that even if the average pressure of a wheel on soil is maintained, degree of its compaction increases. To explain this phenomenon, in our opinion, it is necessary to develop a mathematical model of interaction process of a deformable pneumatic with an elastic-plastic medium, which is considered to be soil subject to modern processing. Working parts of agricultural machines process a wide variety of materials, number of which is increasing, in addition, method of processing the same material is often changed in an effort to improve agricultural technology. This forces us to create new mechanisms for agriculture that were known before. Use of replaceable toothed working parts on flat-cut cultivators helps to reduce energy consumption and improve quality of non-moldboard soil cultivation. Article proposes a method for mathematical description of distribution of machine load over contact surface of a wheeled mover with deformable soil. At the same time, several assumptions and conditions were adopted, namely: volume of skeletal part of deformable soil element remains constant, independent of deformation; contact surface is a curve of two radii - in the load zone (Rl) and in the unloading zone (Ru), tire operating in driven mode has no skids; deformable soil is uniform in depth; wheel load is constant; tire radial stiffness along tread portion width is also constant in magnitude and direction; lateral pressure along deformable soil depth is small and is not taken into account in calculation.

scholarly journals Comportement mécanique d’un sol argileux. Effets de la taille des agrégats, de la teneur en eau et de la pression appliquée

1994 ◽  
Vol 74 (2) ◽  
pp. 185-191 ◽  
Author(s):  
H. Derdour ◽  
M. R. Laverdière ◽  
D. A. Angers
Keyword(s):  
Tensile Strength ◽  
Water Content ◽  
Soil Compaction ◽  
Applied Load ◽  
Aggregate Size ◽  
Sensitivity Threshold ◽  
Compaction Process ◽  
Teneur En Eau ◽  
The Subject ◽  
Water Contents

Soil compaction has been the subject of intense research in recent years, but the mechanisms involved in the compaction process remain poorly understood. The objective of this study was to characterize these mechanisms for a Kamouraska clay (Orthic Humic Gleysol) using beds of aggregates (1–2 mm and 2–3.4 mm) compressed into a uniaxial compression device. Changes in structural void ratio were monitored as a function of aggregate size, applied load and soil water content. Measurements of tensile strength and shrinkage were also made on the larger aggregates (2–3.4 mm) to investigate the involvement of the structural units in the soil compaction process. Aggregate size had little effect on the shape of the compression curves. Compression of the aggregate beds was mainly a function of applied load and water content. The compaction sensitivity threshold was about 0.20–0.22 g g−1 at compression loads of less than 200 kPa. This threshold water content corresponds to the air entry point and to the upper limit of the brittle domain of the aggregates during crushing. These results suggest the existence of a threshold water content above which the soil becomes susceptible to compaction even at low applied stress. Key words: Compression, shrinkage, aggregate tensile strength, threshold water contents

scholarly journals The influence of a soil compaction process on subsequent soil tillage processes. A new research method.

1978 ◽  
Vol 26 (2) ◽  
pp. 191-199
Author(s):  
A.J. Koolen
Keyword(s):  
Moisture Content ◽  
Soil Compaction ◽  
Research Method ◽  
Laboratory Experiments ◽  
Strength Properties ◽  
Soil Samples ◽  
Soil Tillage ◽  
Compaction Process ◽  
Low Costs ◽  
New Research

The influence of a soil compaction process on subsequent tillage processes was studied by laboratory experiments on small soil samples. Suction curves as well as the relation between moisture content and strength properties depend on moisture content at precompaction. The described method allows the testing of many variables at relatively low costs. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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