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 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.

Discussion of an instrumented screw pile load test and connected pile group load settlement behavior

2013 ◽  
Vol 1 (1) ◽  
pp. 13-36 ◽  
Author(s):  
P.O. Van Impe ◽  
W.F. Van Impe ◽  
L. Seminck
Keyword(s):  
Pile Group ◽  
Load Test ◽  
Soil Conditions ◽  
Pile Capacity ◽  
Screw Pile ◽  
Settlement Behavior ◽  
Heterogeneous Soil ◽  
Pile Load Test ◽  
The One ◽  
Oil Tanks

The aim of the paper is to discuss a fully instrumented screw pile load test up to failure, in difficult heterogeneous soil conditions along the shaft. The pre-stressing of the pile during its installation process has been brought to attention as an important item to assisting in explaining the differences in pile capacity and load settlement curve on the one hand, and the data as registered from the pile shaft instrumentation. In the second part of the paper, starting info on the registered load settlement data of the foundation slabs of each of the three, closely positioned, oil tanks of 48 m diameter and 19 m of height are shared and briefly analyzed.

Preliminary design of the kinematic Stirling engine using dynamic similarity and quasi-static simulation

1997 ◽  
Vol 211 (3) ◽  
pp. 229-238 ◽  
Author(s):  
J I Prieto ◽  
J Fano ◽  
C González ◽  
M A González ◽  
R Diaz
Keyword(s):  
Design Method ◽  
Preliminary Design ◽  
Test Results ◽  
Power Losses ◽  
Scaling Factors ◽  
Numerical Examples ◽  
Analysis And Design ◽  
Dynamic Similarity ◽  
Power Maps ◽  
Static Simulation

This paper presents a preliminary design method based on dynamic similarity and quasistatic simulation. The proposal improves methods based on Beale and West correlations and provides the engine speeds corresponding to the maximum indicated powers and the achievement of indicated power maps. The dimensionless factor of indicated power losses provides a new viewpoint for engine analysis and design. In support of the method, experimental GPU-3 test results have been reanalysed, proving the accuracy of maximum indicated power predictions and providing values of the dimensionless factor of indicated power losses. Scaling factors corresponding to strict dynamic similarity are supplied for several typical cases. Similarity relaxation criteria are also recommended to be used when strict dynamic similarity leads to inadequate specifications for the derivative. Some numerical examples illustrate the method.

Performance of helical piles in oil sand

2009 ◽  
Vol 46 (9) ◽  
pp. 1046-1061 ◽  
Author(s):  
Mohammed Sakr
Keyword(s):  
Full Scale ◽  
Load Test ◽  
Test Results ◽  
Lateral Loads ◽  
Oil Sand ◽  
Deep Foundation ◽  
Helical Piles ◽  
Load Tests ◽  
Pile Load Test ◽  
Pile Load Tests

The results of a comprehensive pile load-test program and observations from field monitoring of helical piles with either a single helix or double helixes installed in oil sand are presented in this paper. Eleven full-scale pile load tests were carried out including axial compression, uplift, and lateral load tests. The results of the full-scale load tests are used to develop a theoretical design model for helical piles installed in oil sand. Test results confirm that the helical pile is a viable deep foundation option for support of heavily loaded structures. The test results also demonstrated that circular-shaft helical piles can resist considerable lateral loads.

scholarly journals Cross hole sonic test results for analysis of pile load test

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Swapan Kunar Bagui ◽  
S. K. Puri ◽  
K. Subbiah
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Wide Band ◽  
Load Test ◽  
Test Results ◽  
Pile Capacity ◽  
Uniform Cross Section ◽  
Cell Test ◽  
Pile Load Test ◽  
Sonic Logging

AbstractQuality of concrete for pile can be checked using Cross-hole Sonic Logging (CSL) Test. A processing method wide-band CSL data is presented herein. First Time Arrival (FTA) is an important consideration. In pile capacity analysis or CSL analysis, it is assumed that pile cross section is uniform with uniform value of elastic modulus of concrete but in real practice both are non-uniform. The procedure identifies the location accuracy and further characterizes the features of the defect. FTA is used to find out the location of the distress in the pile. This method identifies the exact location of any void or defect inside the rebar cage of a drilled shaft. This method provides a significant improvement to current techniques used in quality control during construction of bridges. In this present paper, the analysis has been carried out based on uniform and non-uniform values of pile cross section and E value of concrete. Cross hole sonic and pile load test using O-Cell were carried out on same pile at 7 and 28 days of concreting. Same pipes were used for base grout after cross hole sonic test. These results were used to analyze O-cell test results based on a case study and presented in this paper. The distribution of skin frication and skin friction force has also been presented herein with both uniform and non-uniform cross section and E values of concrete. Based on the field test results and analysis a simplified methodology, has been proposed in this paper, for development of Equivalent Top Down Loading with consideration of elastic shortening of pile and surrounding soil for both cases i.e., uniform and non-uniform E values and pile cross sections.

scholarly journals The Effect of Bore Loi on the Comfort of the Body in the Concept of Pine Lining in the Bima Community

2019 ◽  
Author(s):  
Sukmawati . ◽  
Aniharyati . ◽  
Luluk Widarti
Keyword(s):  
Design Method ◽  
The Body ◽  
Wilcoxon Test ◽  
P Value ◽  
Entire Body ◽  
Test Results ◽  
Test Statistic ◽  
Significance Level ◽  
The People ◽  
The One

Bore Loi is a kind of herb known to the people of Bima, and is a heritage from ancient times. Bore Loi is an herb that is made as a ”scrub” which is applied (bore) to the entire body, and let it dry for 16 hours and cleaned the next day with a warm bath. The purpose of this study was to determine the effect of Bore loi (Spice Body Scrub) on the comfort of the freshness of the body of the Bima community in Bolo Village RT 11 RW 03 Madapangga District Bima, this study used the ”One Group Pretest-Posttest Design” method, the researchers tested the changes occurred after an experiment or an intervention. In this study a Wilcoxon test statistic test with a significance level of p ≤ 0.05 was used. Observation 1 respondent as many as 39 people stated uncomfortable after the bore loi action, the second observation experienced a change in which of the 39 respondents 28 people still felt uncomfortable and 11 people felt comfortable. Then a third observation was taken for 28 respondents and the results obtained where of the 28 respondents who did the re-observation there were 24 people felt comfortable and 4 people still felt uncomfortable, this was due to several factors such as age, and physical activity. Wilcoxon Test statistical test results, where from the test results obtained P value = 0.000 <0.05 with a confidence level of 95%. This means that Ho is rejected and H1 is accepted by the influence of bore loi (LulurRempah).

Modification of the ACI 318 Design Method for Slab-Column Connections Subjected to Unbalanced Moment

2014 ◽  
Vol 17 (10) ◽  
pp. 1469-1480
Author(s):  
Kyoung-Kyu Choi ◽  
Dong-Woo Shin ◽  
Hong-Gun Park
Keyword(s):  
Design Method ◽  
Punching Shear ◽  
Vertical Shear ◽  
Strength Prediction ◽  
Shear Stresses ◽  
Test Results ◽  
Reasonable Accuracy ◽  
Proposed Model ◽  
Extensive Test ◽  
Flexural Reinforcement

In the ACI 318–11 design method for slab-column connections subjected to unbalanced moment, the contribution factors assigning the proportion of the connection unbalanced moment to be resisted by the slab flexural reinforcement and by eccentric vertical shear stresses are prescribed by only considering the aspect ratio of columns. However, the validity of the prescribed contribution factors have not been completely verified by extensive test results, and the strength prediction by the design method using the contribution factors does not agree well with existing test results. In the present study, a modified strength model was proposed without prescribing the contribution factors. In the proposed model, the contribution of flexural moment is directly calculated using the slab reinforcement ratio, and the contribution of eccentric shear is calculated based on the conventional eccentric shear stress model. The proposed method was verified by comparing its prediction with existing test results. The results showed that the proposed method predicts the test results with reasonable accuracy, and it corresponds with the fundamental mechanics of the punching shear of slab-column connections as investigated in previous studies.

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