The Comparison of Pile Load Capacity Based on the Results of Analytical Calculations and Static Tests

2015 ◽  
Vol 725-726 ◽  
pp. 190-194
Author(s):  
Andrey Badanin ◽  
Victor Melnikov ◽  
Darya Filippova
Keyword(s):  
Static Load ◽  
Load Capacity ◽  
Load Test ◽  
Construction Technology ◽  
Construction Site ◽  
Static Load Test ◽  
Static Tests ◽  
Saint Petersburg

The article discusses the causes of discrepancies in the values of the pile load capacity based on the results of calculations made on the basis of existing regulations and the pile load capacity after static load test on the construction site. A brief overview of the causes of discrepancies in analytical and practical values ​​of pile load capacity is provided in the article. The possible ways to solve this problem are suggested, namely, the development of the methods of analytical calculations of pile load capacity and the improvement of embedding technical processes. There is an example of such a discrepancy in the construction of a residential complex in Saint-Petersburg presented in the article. It was found that the variation in the results is not caused by the imperfections in the method of calculations, but by the infringements of construction technology. The article provides recommendations to minimize the discrepancies between the calculated and actual values of pile load capacity.

The Plate Body Stabilization Technology of Soft Soil Subgrade in Caofeidian Area

2014 ◽  
Vol 501-504 ◽  
pp. 150-154
Author(s):  
Dong Guo Li ◽  
Jian Ping Chen ◽  
Yong Qiang Zhang
Keyword(s):  
Bearing Capacity ◽  
Static Load ◽  
Soft Soil ◽  
Load Test ◽  
Construction Technology ◽  
Static Load Test ◽  
Treatment Methods ◽  
Soft Foundation

The applicability of the plate body stabilization technology was determined basing on the different treatment methods on soft foundation in Caofeidian areas. It discussed the construction technology and the main points of construction furtherly on the plate body stabilization technology. The soft foundation bearing capacity reached 200kpa and the settlement amount was less than 16mm through static load test after dealing with the soft foundation. The results meet the specifications and project requirements.

scholarly journals Analysis of the Barrette Load Investigation of the Tallest Building in European Union

2018 ◽  
Vol 64 (4) ◽  
pp. 281-292
Author(s):  
G. Kacprzak ◽  
S. Bodus
Keyword(s):  
European Union ◽  
Static Load ◽  
Ground Level ◽  
Load Test ◽  
Construction Site ◽  
Vertical Load ◽  
Static Load Test ◽  
High Rise ◽  
Piled Raft Foundation ◽  
Diaphragm Walls

AbstractThe paper presents a static load test of a pile with the largest vertical load in Poland to-date up to the force of 23000 kN. The test was performed in the centre of Warsaw on the construction site of a future high-rise building to be the tallest building in European Union. The designed building height measured from the ground level is 310 meters including an 80-metre mast. The foundation of the building was designed as a Combined Piled Raft Foundation (CPRF) utilising the barrettes and diaphragm walls technology. The test was carried out on barrettes with lengths of approx. 28 and 34 m and was aimed to estimate the stiffness (load-settlement relation) of the designed 17.5 metre-long barrette situated below the foundation level. In addition to that a series of extensometric sensors was placed inside the barrette to determine the distribution of the axial force.

scholarly journals Static Load Test on Instrumented Pile – Field Data and Numerical Simulations

2017 ◽  
Vol 39 (3) ◽  
pp. 17-25 ◽  
Author(s):  
Adam Krasiński ◽  
Mateusz Wiszniewski
Keyword(s):  
Static Load ◽  
Real Data ◽  
Load Test ◽  
Force Distribution ◽  
Static Load Test ◽  
Reliable Determination ◽  
Static Tests ◽  
Load Tests ◽  
Engineering Practices

Abstract Static load tests on foundation piles are generally carried out in order to determine load – the displacement characteristic of the pile head. For standard (basic) engineering practices this type of test usually provides enough information. However, the knowledge of force distribution along the pile core and its division into the friction along the shaft and the resistance under the base can be very useful. Such information can be obtained by strain gage pile instrumentation [1]. Significant investigations have been completed on this technology, proving its utility and correctness [8], [10], [12]. The results of static tests on instrumented piles are not easy to interpret. There are many factors and processes affecting the final outcome. In order to understand better the whole testing process and soil-structure behavior some investigations and numerical analyses were done. In the paper, real data from a field load test on instrumented piles is discussed and compared with numerical simulation of such a test in similar conditions. Differences and difficulties in the results interpretation with their possible reasons are discussed. Moreover, the authors used their own analytical solution for more reliable determination of force distribution along the pile. The work was presented at the XVII French-Polish Colloquium of Soil and Rock Mechanics, Łódź, 28–30 November 2016.

scholarly journals Static load test curve (Q–s) conversion in to pile of different size

2018 ◽  
Vol 50 (2) ◽  
pp. 171-182
Author(s):  
Zygmunt Meyer ◽  
Kamil Stachecki
Keyword(s):  
Mathematical Description ◽  
Static Load ◽  
Load Capacity ◽  
Limit Load ◽  
Load Test ◽  
Static Load Test ◽  
Load Curve ◽  
Load Tests ◽  
Different Diameters ◽  
Calculation Analysis

Abstract In the work authors analysed possibility of obtaining static load tests curve for a pile in case of changed diameter, using load curve based on results of static load tests for given diameter. In calculation analysis authors used Meyer–Kowalów (M-K) method. A mathematical description was shown of determining new M-K curve for a pile with changed diameter, taking as a basis original M-K curve obtained from static load tests. Then an example of calculations is presented in which parameters of M-K model for a new curve were determined. Simulation calculations were carried out in the original computer program, the results of which includes load curves for piles with different diameters and relations between diameter changes, limit load capacity and settlement of a pile.

scholarly journals Assessment of the bearing capacity of piles during static load test

2020 ◽  
Vol 8 (4) ◽  
pp. 22-27
Author(s):  
Pavel Gavrilov ◽  
Vyacheslav Glukhov
Keyword(s):  
Bearing Capacity ◽  
Static Load ◽  
Field Tests ◽  
Load Test ◽  
Static Load Test ◽  
Static Tests ◽  
Standard Values ◽  
Bored Piles ◽  
The Moment ◽  
Experimental Researches

The purpose of this research is to estimate the bearing capacity of bored piles with broadening, formed by stone rolling. A series of static tests of the existing piles was performed in accordance with the requirements of the current regulatory documentation, the analysis of the obtained results was carried out. According to this experimental researches, was made a conclusion about the advisable to take into account the standard values of settlements at the determining of the bearing capacity of piles by ground. The results of field tests were compared with the calculated values, determined by calculation with the recommendations of SP 24.13330.2011. Noted, that the value of load, corresponding to the moment of the pile «failure», should be taken as a criterion of the factual bearing capacity.

scholarly journals Assessing the pile base capacity from a Static Load Test on model piles

2019 ◽  
Vol 97 ◽  
pp. 04030 ◽  
Author(s):  
Michał Baca ◽  
Włodzimierz Brząkała ◽  
Jarosław Rybak
Keyword(s):  
Bearing Capacity ◽  
Working Conditions ◽  
Static Load ◽  
Testing Procedure ◽  
Test Stand ◽  
Load Test ◽  
Static Load Test ◽  
Static Tests ◽  
Precise Information ◽  
First Results

A static load test of a pile provides information about the pile bearing capacity. Nevertheless sometimes more precise information can be needed, e.g. what part of load applied to the pile is carried by its base and its shaft. Many kinds of bi-directional static tests offer the possibility of a separate investigation of the behaviour of pile base and shaft. In these tests, however, the shaft works in a different direction than in actual pile working conditions. In this paper, the authors focus on the results of a static load test on model piles, which make it possible to solely investigate the pile base capacity. The paper describes the construction of a test stand and the testing procedure, and presents the first results of the preformed tests.

Crack Behaviour of Retrofitted Pre-Tensioned Concrete Beam

2015 ◽  
Vol 752-753 ◽  
pp. 605-609
Author(s):  
Nurul Huda Suliman ◽  
A. Abu Bakar ◽  
Siti Hawa Hamzah ◽  
Norzahiah Shahar
Keyword(s):  
Critical Load ◽  
Concrete Beam ◽  
Static Load ◽  
Load Capacity ◽  
Maximum Load ◽  
Load Test ◽  
Static Load Test ◽  
Structural Durability ◽  
Before And After ◽  
Maintenance Process

Crack is a common cause of the degradation of concrete and may affect its structural durability. In order to ensure the bridge is safe utilized in anticipated period of their future service, a proper maintenance process and procedure should be taken. Therefore in this study, static load test were performed on a pre-tensioned (PRT) concrete beam to investigate crack behaviour before and after retrofitting process as well as to determine the effectiveness of the retrofitting method. A control beam named PRTB1 will fully loaded until fail to determine its maximum load capacity and critical load of the beam. Hence another beam named PRTB-FRP will be loaded until it reached it critical load capacity before retrofitted using Fiber Reinforced Polymer (FRP) plates located beneath the centre of the beam. After the retrofitting process PRTB-FRP will be put again under the static load. The load capacity of PRTB-FRP increased compared to PRTB1 with some improvement in crack propagation behaviour after retrofitted.

Strengthening Experiment of a Hollow Slab Bridge by External Transverse Prestressing

2011 ◽  
Vol 243-249 ◽  
pp. 1561-1566
Author(s):  
Fu Ming Wang ◽  
Sheng Zhen Kang ◽  
Xiao Long Li ◽  
Ying Chun Cai
Keyword(s):  
Static Load ◽  
Load Test ◽  
Strengthening Effect ◽  
Construction Technology ◽  
Test Results ◽  
Static Load Test ◽  
Hinge Joint ◽  
External Prestressing ◽  
Before And After ◽  
Strengthening Method

For hollow slab bridge, its concrete hinge joint is prone to be damaged under overload vehicles, as weakens the transverse integrity of bridge, leads to single slab bearing and threatens the safety of service. Aiming at the problem, a strengthening experiment of an actual concrete hollow slab bridge, which has experienced a destructive test with its transverse connections seriously damaged, was performed by applying external transverse prestressing to it. The strengthening design and construction technology of external prestressing were introduced. By means of truck static load test, the variation of deflections and strains of the bridge before and after strengthening under different tension force was obtained, and the influence of tension value to strengthening effect was emphatically analyzed. The test results proved the effectiveness of the strengthening method and some improvement suggestions were also presented.

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