Effects of Density and Moisture Variation on Dynamic Deformation Properties of Compacted Lateritic Soil

Liu, Weizheng; Qu, Shuai; Nie, Zhihong; Zhang, Junhui

doi:10.1155/2016/5951832

Cited by 14 publications

(9 citation statements)

References 16 publications

(14 reference statements)

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“…While past studies show that the soil bearing capacity changes once the soil experiences change in moisture, it was not clear to what extent does the changes in moisture content affects the soil bearing capacity [5][6][7][8][9]. Varying soil moisture content can lead to differential settlement of structures and such settlement can occur during construction or when a building is complete and in use [10][11][12][13][14][15][16].…”

Section: Buildings Collapse In Kenyamentioning

confidence: 99%

Influence of Variation in Moisture Content to Soil Bearing Capacity in Nairobi Area and Its Environs

Ngugi¹,

Shitote²,

Ambassah³

et al. 2019

AJETM

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Section: Buildings Collapse In Kenyamentioning

confidence: 99%

Influence of Variation in Moisture Content to Soil Bearing Capacity in Nairobi Area and Its Environs

Ngugi¹,

Shitote²,

Ambassah³

et al. 2019

AJETM

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“…To fabricate the LPG type fiber optic sensors, with the appropriate measurement range and resolution, we first calculate the strain distribution (σz) and deformations (ξz) expected for the clay-sandy soil of UNICAMP, subjected to loads surface up to 227 KPa. Young's modulus values Y = 4.6 MPa and Poisson's modulus ν = 0.5 were used in this simulation for this type of soil in according to the values obtained using other techniques [8][9][10][11][12][13]. The results of the simulations showed, for a surface load of 227 kPa, a transmitted stress of less than 1% and a soil deformation of less than 2% of the maximum deformation at only a depth of 0,6 m.…”

Section: The Fiber Optic Sensorsmentioning

confidence: 99%

Monitoring of stresses and deformations in soils by fiber optic sensors

Mosquera¹,

Basurto²

2018

EasyChair Preprints

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This paper shows the application of LPG optical fiber sensors to the determination of the transmitted stress and deformation of a sample of confined soil subjected to surface loads. The transmitted stress was measured by a mechanical LPG pressure sensor and the curvature of the ground by permanent LPG sensors buried at depths of 0.1m; 0.2m; 0.4m and 0.6m. Clay-sandy soil characteristic of UNICAMP was deposited in a cylinder of 0.8m in length and 0.30m in diameter. The soil was lightly compacted in 0.2m layers and an LPG sensor was installed on each layer. Surface loads of up to 227 KPa were applied to the surface of the soil, measuring axial soil deformations of less than 3mm by our sensors with sensitivities of the order of 0.22 mm/dB. The values of the modulus of elasticity for this type of soil were determined from the fitting of the Boussinesq equations with the values measured by the buried LPG sensors. A Young's modulus of 5.40 MPa and a Poisson's coefficient ν = 0.52 were determined for this type of soil.

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“…Although these evaluation methods are the best and reliable, they have relatively complicated steps and take much time to have the end result [9]. In addition, the soil samples in these methods need to be cored or excavated on the subgrade which is destructive and can have significant impact on pavement performance [10]. To overcome these shortcomings, many nondestructive and time-saving determination methods and equipment have been developed [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Degree of Compaction of Fine-Grained Soil Subgrade Using Light Dynamic Penetrometer

Zhang

Yao

Huang

et al. 2018

Advances in Civil Engineering

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To determine the degree of compaction of subgrades filled with fine-grained soil, the compaction test and light dynamic penetrometer (LDP) test were carried out for low liquid-limit clay samples with different water contents in laboratory. Then, a prediction equation of the penetration ratio (PR) defined as the depth per drop of the hammer of LDP, degree of compaction (K), and water content (ω) was built. After that, the existing fine-grained soil subgrades on LDP-based field tests were excavated. The on-site PR values, water contents, and degrees of compaction of slopes were obtained. The estimated degrees of compaction using the prediction equation were compared with measured values of the degree of compaction in field. The results show that there is good consistency between them, and an error within 3.5% was obtained. In addition, the water content should be determined firstly while using the prediction equation which is proposed in this study. Therefore, a numerical method of the water content of a subgrade was developed, and the predicted and measured water contents were compared, which shows a relatively high relativity. Then, the degree of compaction of fine-grained soil subgrades can be calculated according to the predicting equation, which involves the penetration ratio (PR) and the numerically calculated water content as input instead of the measured value in the field.

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Effects of Density and Moisture Variation on Dynamic Deformation Properties of Compacted Lateritic Soil

Cited by 14 publications

References 16 publications

Influence of Variation in Moisture Content to Soil Bearing Capacity in Nairobi Area and Its Environs

Influence of Variation in Moisture Content to Soil Bearing Capacity in Nairobi Area and Its Environs

Monitoring of stresses and deformations in soils by fiber optic sensors

Measurement of Degree of Compaction of Fine-Grained Soil Subgrade Using Light Dynamic Penetrometer

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