Experimental Study on Size Effect of Plate Load Test in Roadbed Compaction Quality Detection

2011 ◽  
Vol 230-232 ◽  
pp. 367-371
Author(s):  
Xiao Yong Li ◽  
Kang Xu ◽  
Si Yuan Wang
Keyword(s):  
Experimental Study ◽  
Laboratory Test ◽  
Size Effect ◽  
Test Section ◽  
Regression Equation ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Quality Detection ◽  
The One

There are three normal sizes of loading plate as 30 cm, 50 cm, 75 cm in roadbed compaction quality detection. The size effect rule for coefficient of foundation is obtained from the investigation on plate load test results by the experiment in lab. The laboratory test may control well the conditions by building the test section modeling the roadbed. The test section is 15 m by 5m. The diameters of loading plate used is 30cm, 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70cm and 75cm in the test. The regression equation between coefficients of foundation measured by different size of loading plate has been concluded. It is obtained that the ratio of coefficients of foundation between the plate of 50 cm and 30cm is 1.6 for granule filler, 1.65 for grind filler, and the one between the plate of 70 cm and 30cm is 2.17 for granule filler, 2.3 for grind filler.

scholarly journals Prediction of Effects of Geogrid Reinforced Granular Fill on the Behaviour of Static Liquefaction

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. Hemalatha ◽  
N. Mahendran ◽  
G. Ganesh Prabhu
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Large Size ◽  
Static Liquefaction ◽  
Granular Fill ◽  
Size Dimension ◽  
Subgrade Modulus ◽  
Different Thickness

The experimental investigation on the effects of granular fill and geogrid reinforced granular fill on the behaviour of the static liquefaction potential of the subsoil is reported in this study. A series of plate load test were carried out with different thickness of the granular fill, number of geogrid layers, and size/dimension of the footing. The test results were presented in terms of bearing capacity and subgrade modulus for the settlement ofδ10,δ15, andδ20. The experimental results revealed that the introduction of granular fill significantly increases the bearing capacity and effectively control the settlement behaviour of the footing. The introduction of geogrid in granular fill enhanced the Percentage of Control in Settlement and Bearing Capacity Ratio by a maximum of 328.54% and 203.41%, respectively. The introduction of geogrid in granular fill interrupts the failure zone of the granular fill and enhances the subgrade modulus of the footing by a maximum of 255.55%; in addition subgrade modulus of the footing was increased with an increase in the number of geogrid layers. Based on the test results it is suggested that the footing with large size has beneficial improvement on the reinforced granular fill.

scholarly journals ANALYSIS OF STATIC AND DYNAMIC DEFORMATION MODULUS

2016 ◽  
Vol 8 (2) ◽  
pp. 79-84 ◽  
Author(s):  
Mindaugas Mikolainis ◽  
Marijus Ustinovičius ◽  
Danutė Sližytė ◽  
Tatyana Zhilkina
Keyword(s):  
Soil Compaction ◽  
Dynamic Deformation ◽  
Deformation Modulus ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Test Execution ◽  
Load Tests ◽  
Different Depths ◽  
Result Interpretation

This article summarises dynamic deformation modulus correlation with second reload of static plate load test results for an even thickness soil strata layer. An analysis of execution and result interpretation of both static deformation modulus and dynamic deformation modulus is provided also. Different correlations between the two modulus according to different authors are provided. Since dynamic plate load test is not regulated in Lithuania as a soil compaction contron method, a few dynamic plate load tests and static plate load tests were executed in order to compare compaction results. The additional experiments for dynamic plate load tests in different depths were executed which showed that deformation modulus is dependant on depth of test execution, thus it is worthwile to mention to be cautious on compaction results in trenches.

scholarly journals A Local Design Method for Pile Foundations

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Nunzia Letizia ◽  
Chiara Iodice ◽  
Alessandro Mandolini
Keyword(s):  
Design Method ◽  
Load Test ◽  
Preliminary Design ◽  
Test Results ◽  
Reasonable Accuracy ◽  
Case Histories ◽  
Original Design ◽  
Settlement Ratio ◽  
Pile Load Test ◽  
The One

The work at hand attempts to propose a local pile design method based on pile load test results for a reference site. Such LPDM is simply based on the identification of three dimensionless quantities, such as the capacity ratio CR, the stiffness ratio SR, and the group settlement ratio Rs. To prove the LPDM reliability, experimental data collected during years in the Neapolitan area (Italy) have been used to obtain the abovementioned coefficients. Then, LPDM has been applied, as a preliminary design method, to three well-documented case histories applying capacity and settlement-based design (CBD and SBD) approaches. The satisfactory agreement between the geometry in the original design of piles and the one obtained by applying the LPDM proves that the proposed methodology may be very helpful for preliminary design, allowing for reasonable accuracy while requiring few hand calculations.

Experimental Verification of Resilient Deformation for Granular Subgrades

1998 ◽  
Vol 1639 (1) ◽  
pp. 12-22 ◽  
Author(s):  
W. Virgil Ping ◽  
Zenghai Yang
Keyword(s):  
Moisture Content ◽  
Laboratory Test ◽  
Resilient Modulus ◽  
Soil Samples ◽  
Load Test ◽  
Experimental Program ◽  
Rigid Plate ◽  
Plate Load Test ◽  
Reconstituted Soil ◽  
Moisture Conditions

Results of an experimental program utilizing the repetitive rigid plate load test in a test-pit facility and the laboratory resilient modulus test are presented for five typical subgrades in Florida. The subgrade materials were tested in the test pit under three different moisture conditions, that is, (1) optimum, (2) drained and dried, and (3) soaked. Laboratory resilient modulus tests were conducted on reconstituted soil samples simulating the various moisture conditions. The resilient modulus was significantly affected by the moisture content of granular subgrades. A comparison between the deformations measured from the test-pit test and the deformation calculated from the laboratory test was made. It was experimentally verified that the resilient modulus resulting from the laboratory triaxial test could be used to predict the resilient deformation of pavement subgrade layers.

Experimental Study on the Secondary Consolidation Properties of Marine Soft

2014 ◽  
Vol 638-640 ◽  
pp. 452-456 ◽  
Author(s):  
Chao Jie Zhang ◽  
Shi Hua Chen ◽  
Guo Qian Liang ◽  
Hai Yun Wei
Keyword(s):  
Experimental Study ◽  
Great Influence ◽  
Test Results ◽  
Loading History ◽  
Coefficient Of Consolidation ◽  
One Dimensional ◽  
Deformation Law ◽  
Subsequent Deformation ◽  
The One ◽  
Previous Loading

Through the one dimensional consolidation of creep test, the paper presents and analyzes the deformation law of reloading under different stress level, the variation of the coefficient of consolidation and the relation between the secondary consolidation deformation and loading history. These test results show that the secondary compression during previous loading has great influence on the subsequent deformation of soil.

The determination of rock mass modulus variation with depth for weathered or jointed rock

1982 ◽  
Vol 19 (1) ◽  
pp. 29-43 ◽  
Author(s):  
R. K. Rowe
Keyword(s):  
Rock Mass ◽  
Jointed Rock ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Worked Example ◽  
Single Plate ◽  
Rock Mass Modulus ◽  
Second Procedure

Weathering or the variation in frequency and tightness of joints may result in an increase in mass modulus with depth for some rocks. This increase in modulus will continue until a depth is reached at which the rock behaves as a sound intact unit and the modulus will be relatively constant with depth below this point. In this paper, elastic solutions are presented for the deformation of such a rock mass due to a uniform or approximately rigid circular loading.Two procedures are described for determining the rock mass modulus profile from plate load test results. The first procedure uses the results from three plate tests to infer the variation in modulus with depth. The second procedure uses the measured variation in displacement with depth below a single plate to infer the mass modulus variation. The application of the two procedures is illustrated by a worked example and by consideration of a field case where the inferred modulus is shown to be in good agreement with alternative modulus variation data.

Experimental Study on Scale Effects of Bentonite / Sand Mixtures on Gas Migration Properties

1996 ◽  
Vol 465 ◽  
Author(s):  
Toshiyuki Hokari ◽  
Mitsunobu Okihara ◽  
Takashi Ishii ◽  
Takao Ishii ◽  
Hiroyuki Ikuse
Keyword(s):  
Experimental Study ◽  
Laboratory Test ◽  
Large Scale ◽  
Scale Effects ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Gas Migration ◽  
Test Results ◽  
Laboratory Test Results ◽  
Small Test

ABSTRACTGas migration properties of bentonite/sand mixtures for a large-scale structure were estimated on the basis of laboratory test results obtained with small test specimens. Water and gas migration tests were carried out to clarify scale effects on migration properties of the mixtures.

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