Estudios comparativos del grado de compactación y módulo de young para evaluar la respuesta mecánica en rellenos estructurales
Soil compaction control is a task carried out to avoid deformation of the soil when subjected to different stresses, currently the most used methods in this work, correspond to use equipment such as the nuclear densimeter, electronic densimeter and sand cone, without However, these methods have cert...
Պահպանված է:
| Հիմնական հեղինակ: | |
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| Ձևաչափ: | bachelorThesis |
| Հրապարակվել է: |
2017
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| Խորագրեր: | |
| Առցանց հասանելիություն: | http://repositorio.utmachala.edu.ec/handle/48000/11604 |
| Ցուցիչներ: |
Ավելացրեք ցուցիչ
Չկան պիտակներ, Եղեք առաջինը, ով նշում է այս գրառումը!
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Ավելացրեք ցուցիչ | Ամփոփում: | Soil compaction control is a task carried out to avoid deformation of the soil when subjected to different stresses, currently the most used methods in this work, correspond to use equipment such as the nuclear densimeter, electronic densimeter and sand cone, without However, these methods have certain disadvantages such as run time and calibration thereof. Under these conditions it is intended to optimize the performance when a compaction control is carried out. The present research encourages the use of the Geogauge equipment, which presents greater benefits because it evaluates the mechanical properties of the granular layers elasticity and stiffness) in a shorter time. In order to support the use of Geogauge equipment, a comparative study between the degree of compaction Vs the modulus of elasticity, which was carried out thanks to the in-situ densification by the sand cone test and the use of Geogauge equipment, which is an element backed by the ASTM - D6758 standard which allows the use of electronic equipment in the measurement of rigidities and modules in the field by an Electro - mechanical Method. To determine the relationship of these two variables we located in the citadel Palermo of the City of Machala, which focused 40 separate scattered points at a distance of 3 to 6 meters; these were located in the vehicular passageways throughout the city at a rate of 20 points in phases 1 and 2 of construction. It is worth mentioning that previously, proctor, granulometry and CBR tests were carried out in order to determine the maximum dry density, optimum soil compaction humidity, to determine the percentage of particle size within the material and the resistance presents the soil; all these tests were carried out in the Laboratories Geolab and Associates; who provided the necessary resources as equipment, materials and those who contributed to achieve the objective of this project. As a result of the present work a direct relationship between the variables of the dry density of the material together with the modulus of elasticity was determined, starting from the values taken through the sand cone method together with data obtained with Geogauge equipment . From the 40 points we have maximum and minimum values, the lowest being a degree of compaction of 75% having a module of 10.15 KPsi while for the point of 100% compaction a value of 20.37 KPsi was determined, according to the determination of the correlation of Pearson it was determined to a factor of approximately 80% between these variables, this process was executed thanks to the software of Excel, the same that the tabular data can be observed the linearity and dispersion of the respective points, in the same it is evidenced that both factors are positively functional, that is to say that the higher the density, the greater its module. During the tests of CBR compacted to different numbers of blows and different moisture content points with a water content of less than 4% and greater than 6% are obtained, which have a low density. However, it is important to mention that samples with a moisture content of 4% compacted at 56 beats comply with the density but fail to meet the minimum module requirement, a characteristic that would not be appreciable if a density control is performed. The compacted elements with a moisture content of 5% to 6% at 56 strokes comply with both strength and degree of compaction. Therefore, when performing checks with the Geogauge after the compaction process we can verify that the material meets the minimum resistance requirement. As a conclusion of the project we have Geogauge equipment is an optimal element when performing a control for resistance to soils, as it provides the modulus of elasticity of the material, element that relates to the dry density and which in turn helps to identify to the operator any inconvenience or anomaly prevailing within the structure of the embankment, allowing to grant a quick solution thanks to the presence of the machines present during the compaction processes and thus to avoid unnecessary expenses in the future in the repair of the structure due to settlements produced. It is also important to mention that performing resistance control is more beneficial than compaction control, such as pavement; structural element that is designed through the same soil resistance |
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