Current Use of Prestressed Concrete Pipe Piles Founded in Silty Geomaterials

2010 ◽  
Vol 168-170 ◽  
pp. 116-120
Author(s):  
Feng Yu ◽  
Jing Yu He ◽  
Zhong Miao Zhang
Keyword(s):  
Prestressed Concrete ◽  
Slenderness Ratio ◽  
Load Test ◽  
Test Results ◽  
Deep Foundation ◽  
Concrete Pipe ◽  
Independent Case ◽  
Limiting Value ◽  
Made In

Prestressed concrete pipe piles have been increasingly used as deep foundation structures for decades. Despite the availability of a limited number of well-instrumented load test results, pile designers would like to know the general performance of such piles in case of lacking adequate experience. An attempt is made in this study to establish a database composed of more than one thousand of pile tests. All piles are founded in silty soil that is one of the competent bearing geomaterials. Short and medium-length piles with slenderness ratios ranging from 20 to 80 are most widely used. The capacity of pile increases with increasing the pile slenderness ratio until a limiting value is achieved. Use of very long piles to reduce settlement is unfavorable and the rebound rates for piles with various lengths are similar. An independent case study is also conducted to witness the success of employing the empiricism-based analyses in the preliminary design of concrete pipe piles.

a Taskboard System Based On Website (Case Study: CV Nukegraphic Indonesia)

Tech-E ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 10
Author(s):  
Ceng Giap Yo ◽  
Dennie
Keyword(s):  
Information Technology ◽  
Test Results ◽  
Work Process ◽  
Web Based ◽  
Task List ◽  
The Status ◽  
Short Time ◽  
A Company ◽  
Made In

CV. Nukegraphic Indonesia as one of the fast growing website in Indonesia would require a lot of support, including support in the field of Information Technology. Recording task list that still use manual systems, often prevent the processing of information about the details of the status of the task and the status of projects ongoing or already completed in the form of a percentage of each project, as well as recording task that still use paper media is also considered only will lead to waste in paper usage. Recording task that is only made in the scope of the company's staff also hinder the work process of the company when staff are outside the company. The method used in the manufacture of a web-based application taskboard this form of collecting data through observation and questionnaires were distributed in the scope of the company. The test results of these applications concluded that with the application taskboard-based website is an account executive can find out information about the details of the status and the status of the project in a short time, because the data processing has been made into a computerized provided through the application, both an account executive and members are also more easy in knowing the task that must be done even though it is outside the company. With this application is expected to help the performance of employees in a company to be more productive

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.

Experimental Studies on Bearing Capacity of Post-Tensioned Unbonded Prestressed Concrete Hollowed Floors

2011 ◽  
Vol 368-373 ◽  
pp. 159-163 ◽  
Author(s):  
Xiao Hua Yang ◽  
Chao Yang Zhou ◽  
Xue Jun He ◽  
Zhi Qing Yang
Keyword(s):  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Plastic Hinge ◽  
Experimental Studies ◽  
Load Test ◽  
Test Results ◽  
Three Stages ◽  
Hinge Model ◽  
Good Agreement ◽  
Post Tensioned

A 1/4 scales four-storey model of post-tensioned unbonded prestressed concrete hollow slab-column structure has been made to do the ultimate load test on the second-storey floor. By measuring the floor deflection, stresses of steel bars and cracks of floors, the bearing capacity of floor is explored. The bearing capacity tests of floor are divided into three stages: elastic stage, crack growth stage and destruction stage. Based on the test results and crack developments in floor, a improved plastic hinge model is carried out to predict the ultimate loads. The calculated results of the ultimate loads with improved plastic hinge model are in good agreement with the experiment data.

scholarly journals Finite Element Modelling of Prestressed Concrete Piles in Soft Soils, Case Study: Northern Jakarta, Indonesia

2021 ◽  
pp. 21-30
Author(s):  
Aswin Lim ◽  
Varian Harwin Batistuta ◽  
Yiska Vivian Chritiansen Wijaya
Keyword(s):  
Finite Element ◽  
Prestressed Concrete ◽  
Coastal Area ◽  
Interface Strength ◽  
Load Test ◽  
Loading Test ◽  
Soft Soils ◽  
Concrete Piles ◽  
High Rise

Jakarta is faced with limited land resources due to its position as the capital city of Indonesia. Therefore, numerous high-rise buildings are being constructed to solve this problem and provide accommodations for a large number of Jakarta residents. Studies have shown that prestressed concrete piles (spun piles) are commonly used as the foundations of high-rise buildings in metropolitan cities across Indonesia, especially in the Northern Jakarta Coastal area, which is predominant with deep soft soils deposit. To further assess and verify the ultimate capacity of the pile, a static loading test was conducted. However, not all results from the field test produced ideal, accurate, precise, and reliable load-settlement curve (until failure) results. Therefore, this study aims to determine the soil properties for the analysis of prestressed concrete spun piles with a diameter of 600 mm in the Northern Jakarta coastal area based on the standard penetration test values (SPT-N). It is a case study of a well-documented static pile load test using the kentledge system. Back analyses were performed by the finite element method to obtain the extrapolated load-settlement curve. Furthermore, the effect of interface strength between pile and soil on the load-settlement curve was also investigated. The results showed that a reduction of interface strength leads to a smaller load–settlement curve. In addition, several geotechnical engineering parameters of soil, such as the undrained shear strength and effective young's modulus, were established using data from an in-situ soil site investigation and empirical correlations with SPT-N.

Shear analysis and static load test of single-box and multicell composite girders with corrugated steel webs: a case study

2020 ◽  
Vol 47 (5) ◽  
pp. 556-566
Author(s):  
Jie Li ◽  
Guopeng Du ◽  
Guanjie Feng ◽  
Yuanlin Feng ◽  
Xin Yan ◽  
...  
Keyword(s):  
Structural Reliability ◽  
Static Load ◽  
Close Relation ◽  
Load Test ◽  
Test Results ◽  
Static Load Test ◽  
Shear Design ◽  
Concrete Plates ◽  
Corrugated Steel Web

The shear design of a corrugated steel web box girder is important for structural reliability. Presently, corrugated steel webs bear all the shear forces, and the top and bottom concrete plates bear no shear force. Each steel web has equal force. This design is conservative and uneconomical and may sometimes be unsafe. The shear ratio and transfer efficiency of each corrugated steel web are investigated in this study through numerical analysis. Then, the distribution of shear stress in corrugated steel webs is verified through a static load test. Results show that the shear is shared by the top and bottom concrete plates and corrugated steel webs. The shear ratio presents a close relation with boundary, loading, and section position. The influence of a transverse diaphragm on the shear ratio is minimal, and this influence demonstrates a certain effect only on the steel webs located at the area of the transverse diaphragm.

Pile-driving Induced Vibration and its Transmission to Buildings

1992 ◽  
Vol 11 (3) ◽  
pp. 76-88
Author(s):  
J.M. Ko ◽  
S.T. Luk ◽  
C.Y. Cheng
Keyword(s):  
Prestressed Concrete ◽  
Ground Vibration ◽  
Concrete Pavement ◽  
Shallow Foundation ◽  
Pile Driving ◽  
Construction Site ◽  
Deep Foundation ◽  
Driving Source ◽  
Storey Building

The paper reports a case study of pile-driving induced vibration and its transmission to buildings which was carried out in the construction site of the Phase IV development of the Hong Kong Polytechnic. Ground vibration caused by driving prestressed concrete tubular piles using a diesel hammer in the. reclaimed site are measured and analysed. Vibrations transmitted from the driving source to a concrete pavement, a two-storey building with shallow foundation and an eight-storey building with deep foundation are also measured and analysed The results are discussed and compared with those given by other researchers.

Performance of Double-T Prestressed Concrete Beams Strengthened with Steel Reinforcement Polymer

2005 ◽  
Vol 8 (4) ◽  
pp. 427-442 ◽  
Author(s):  
Paolo Casadei ◽  
Antonio Nanni ◽  
Tarek Alkhrdaji ◽  
Jay Thomas
Keyword(s):  
Prestressed Concrete ◽  
High Strength ◽  
Test Results ◽  
Flexural Performance ◽  
Reinforced Polymer ◽  
First Case ◽  
Analytical Work ◽  
Externally Bonded ◽  
Steel Cords

In the fall of 2002, a two-storey parking garage in Bloomington, Indiana, built with precast prestrestressed concrete (PC) double-T beams, was decommissioned due to a need for increased parking-space. This led to the opportunity of investigating the flexural performance of the PC double-T beams, upgraded in the positive moment region with steel reinforced polymer (SRP) composite materials, representing the first case study where this material has been applied in the field. SRP makes use of high-strength steel cords embedded in an epoxy resin. This paper reports on the test results to failure of three beams: a control specimen, a beam strengthened with one ply of SRP and a third beam strengthened with two plies of SRP anchored at both ends with SRP U-wraps. Results showed that SRP can significantly improve both flexural capacity and enhance pseudo-ductility. Preliminary analytical work shows that the same approach used for externally bonded fiber reinforced polymer (FRP) can be satisfactorly used for SRP.

PENGKAJIAN KEKUATAN BETON STRUKTUR JEMBATAN PASCA KEBAKARAN

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Sudarmadi Sudarmadi
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Concrete Testing

In this paper a case study about concrete strength assessment of bridge structure experiencing fire is discussed. Assessment methods include activities of visual inspection, concrete testing by Hammer Test, Ultrasonic Pulse Velocity Test, and Core Test. Then, test results are compared with the requirement of RSNI T-12-2004. Test results show that surface concrete at the location of fire deteriorates so that its quality is decreased into the category of Very Poor with ultrasonic pulse velocity ranges between 1,14 – 1,74 km/s. From test results also it can be known that concrete compressive strength of inner part of bridge pier ranges about 267 – 274 kg/cm2 and concrete compressive strength of beam and plate experiencing fire directly is about 173 kg/cm2 and 159 kg/cm2. It can be concluded that surface concrete strength at the location of fire does not meet the requirement of RSNI T-12-2004. So, repair on surface concrete of pier, beam, and plate at the location of fire is required.

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