The design and performance of heavily loaded piles in a high-risk earthquake zone

1983 ◽  
Vol 20 (2) ◽  
pp. 262-275
Author(s):  
George H. Watson ◽  
Richard S. Williams ◽  
Chun Chiu Yam
Keyword(s):  
Industrial Development ◽  
Load Transfer ◽  
Active Regions ◽  
Load Test ◽  
Lateral Loads ◽  
Axial Loads ◽  
Load Tests ◽  
The Government ◽  
And Performance ◽  
Earthquake Zone

Amoco International Oil Company and the government of Trinidad and Tobago have formed a consortium (FERTRIN) to construct and operate two ammonia plants. The site is located on the west coast of Trinidad some 32 km south of Port of Spain and is part of a major industrial development being planned by the government.Trinidad is located in one of the most seismically active regions of the Caribbean. Local building codes are still in the process of development, but local practice requires design specifications similar to the highest risk earthquake zones in California. As a result, piling under critical and heavy structures is often governed by the lateral rather than the vertical load requirements.This paper describes the choice, design, and performance of the piles tested for the FERTRIN ammonia plants. The design methods are evaluated and predictions of both lateral and vertical pile performance are compared with the load test results. Keywords: piles, lateral loads, axial loads, load tests, foundations, load transfer.

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.

Field pile load tests in saline permafrost. II. Analysis of results

1993 ◽  
Vol 30 (1) ◽  
pp. 46-59 ◽  
Author(s):  
K. W. Biggar ◽  
D. C. Sego
Keyword(s):  
Load Transfer ◽  
Constant Load ◽  
Frozen Soil ◽  
Load Test ◽  
Time Dependent ◽  
Test Field ◽  
Backfill Material ◽  
Analysis Of Results ◽  
Load Tests ◽  
Pile Load Tests

The results obtained from 14 pile load tests carried out in saline permafrost at Iqaluit, Northwest Territories, are analyzed with respect to (i) the development of load along the length of the piles as determined from strain gauges mounted along the embedded portion of the piles; (ii) the time-dependent displacement of the piles under a constant load; and (iii) the performance of grout as a backfill material. The grout used as a backfill material cured adequately and provided sufficient bond strength between the anchor and the grout to cause either the anchor to yield or failure in the surrounding frozen soil. The development of load along the pile resulted in a nearly uniform stress distribution for smooth-surfaced piles but was highly nonuniform when lugs were added. Time-dependent displacement of the piles without lugs can be described using a power-law relationship. Key words : permafrost, saline, pile, load test, field, in situ capacity, load transfer.

scholarly journals Laboratory Research of Toe Resistance Based on Static Pile Load Tests in Different Schemes

2018 ◽  
Vol 28 (1) ◽  
pp. 172-181 ◽  
Author(s):  
Krzysztof Żarkiewicz
Keyword(s):  
Skin Friction ◽  
Applied Load ◽  
Load Transfer ◽  
Load Test ◽  
Laboratory Research ◽  
Load Tests ◽  
Pile Load Test ◽  
Friction Curve ◽  
Pile Load Tests ◽  
Surrounding Soil

Abstract Transfer of axial force from the head of a pile to the surrounding soil by skin friction and toe resistance is still uncertain. The results of the static pile load test are usually presented as settlement curve. This curve can be divided into two components: skin friction curve and toe resistance curve according to the settlement. Laboratory research of pile load test was carried out in two schemes: with skin friction and without skin friction. The study proved that the toe resistance with and without skin friction is not the same. Skin friction influence on toe resistance due to settlement. This phenomenon is not usually taken into account, but very often has a significant impact on axially applied load transfer. In the paper results of laboratory pile load tests id, different schemes were presented.

Axial testing and numerical modeling of square shaft helical piles under compressive and tensile loading

2008 ◽  
Vol 45 (8) ◽  
pp. 1142-1155 ◽  
Author(s):  
Ben Livneh ◽  
M. Hesham El Naggar
Keyword(s):  
Numerical Modeling ◽  
Shear Failure ◽  
Load Transfer ◽  
Failure Surface ◽  
Correlation Factor ◽  
Axial Loads ◽  
Element Analysis ◽  
Pile Capacity ◽  
Helical Piles ◽  
Load Tests

Helical piles are increasingly used to support and rehabilitate structures subjected to both tensile and compressive axial loads. This paper presents a detailed investigation into the axial performance of helical piles. The study encompasses 19 full-scale load tests in different soils and numerical modeling using finite element analysis. The ultimate load criteria and load transfer mechanisms for helical piles were examined. In addition, the relationship between the installation effort (torque) and pile capacity was explored to determine its suitability for predicting pile capacity. The piles tested were made of three circular pitched bearing plates welded at a spacing of three helical diameters to a solid-square, slender steel shaft. It is proposed to determine the ultimate pile capacity as the load corresponding to pile head movement equal to 8% of the largest helix diameter plus the pile elastic deflection. A torque correlation factor, KT = 33 m–1 for compression and KT = 24 m–1 for uplift, was established to relate the ultimate pile capacity to the installation torque. It was found that load transfer to the soil is predominantly through a cylindrical shear failure surface that follows the tapered profile of the interhelices soils and the bearing capacity of the lead helix in the direction of loading.

scholarly journals Zimbabwe’s Indigenous SME policy Framework, a tool for black empowerment

2020 ◽  
Author(s):  
Godfrey Tambudzayi Musabayana ◽  
Emmanuel Mutambara
Keyword(s):  
Economic Crisis ◽  
Development Policy ◽  
Industrial Development ◽  
Economic Transformation ◽  
Policy Framework ◽  
Medium Enterprise ◽  
The Government ◽  
And Performance ◽  
The Impact ◽  
Black Empowerment

Abstract Small to Medium Enterprise (SMEs) play a pivotal role in growing the economy as well as alleviating poverty across the marginalised citizens, especially in an economy such has Zimbabwe, which has experienced indiscriminate closure of large corporates to advance the indigenisation thrust of the government. In response to the closure of large corporates, Zimbabwe focused on SMEs as an alternative to close the gap. The Zimbabwe Industrial Development Policy (IDP) and the Indigenisation and Empowerment Policy (IEP) were put in place as the vehicles of economic transformation. This article analyses the impact of these two policies on the performance Zimbabwean SMEs. The article contributes knowledge on how African governments respond to economic crisis through the policies that they enact targeting the enterprises of the local citizens. Methodologically, the study critically analyses the literature on SME policies and performance in Zimbabwe. The article drew insights from both the IDP and IEP as well as form findings from other secondary studies.

Factors Influencing Green Warehouse Practices in Malaysian Warehouse Industry: An Empirical Analysis

2019 ◽  
Vol 5 (1) ◽  
pp. 54
Author(s):  
Siti Norida Wahab ◽  
Nazura Mohamed Sayuti ◽  
Azimah Daud
Keyword(s):  
Industrial Development ◽  
Data Gathering ◽  
Global Market ◽  
Acceptance Rate ◽  
Extensive Literature ◽  
Factors Influencing ◽  
Industry Competition ◽  
Management Commitment ◽  
Top Management Commitment ◽  
The Government

The purpose of this study is to provide an understanding of the factors influencing green warehouse practices (GWP) in the Malaysian warehouse industry. Both stakeholder theory (ST) and institutional theory (IT) act as the foundation in developing the theoretical framework. Six factors were identified resulted from preliminary data gathering and an extensive literature review for constructing the model. The sample size consists of 226 respondents with the acceptance rate of 89 per cent. The findings revealed that customer demand, owner support, employee involvement, top management commitment, industry competition, and governmental pressure are positively associated with GWP. Based on the findings, warehouse companies and relevant authorities in Malaysia should focus on the importance of GWP towards becoming more competitive in the global market. The study provides a theoretical gap by proposing a valuable implication to scholars and practitioners in promoting sustainable industrial development which aligns with the government national agenda.

Comparison of the Bidirectional Load Test with the Top-Down Load Test

2005 ◽  
Vol 1936 (1) ◽  
pp. 108-116 ◽  
Author(s):  
Oh Sung Kwon ◽  
Yongkyu Choi ◽  
Ohkyun Kwon ◽  
Myoung Mo Kim
Keyword(s):  
Load Transfer ◽  
Measurement Data ◽  
Load Test ◽  
Load Testing ◽  
Pile Head ◽  
Top Down ◽  
Simple Method ◽  
Testing Method ◽  
Settlement Behavior ◽  
Cell Test

For the past decade, the Osterberg testing method (O-cell test) has been proved advantageous over the conventional pile load testing method in many aspects. However, because the O-cell test uses a loading mechanism entirely different from that of the conventional pile loading testing method, many investigators and practicing engineers have been concerned that the O-cell test would give inaccurate results, especially about the pile head settlement behavior. Therefore, a bidirectional load test using the Osterberg method and the conventional top-down load test were executed on 1.5-m diameter cast-in-place concrete piles at the same time and site. Strain gauges were placed on the piles. The two tests gave similar load transfer curves at various depth of piles. However, the top-down equivalent curve constructed from the bidirectional load test results predicted the pile head settlement under the pile design load to be approximately one half of that predicted by the conventional top-down load test. To improve the prediction accuracy of the top-down equivalent curve, a simple method that accounts for the pile compression was proposed. It was also shown that the strain gauge measurement data from the bidirectional load test could reproduce almost the same top-down curve.

Analysis of Financial Performance of Public Sector Banks in India: CAMEL

2020 ◽  
pp. 097674792096686
Author(s):  
Yudhvir Singh ◽  
Ram Milan
Keyword(s):  
Public Sector ◽  
Banking Sector ◽  
Positive Impact ◽  
Secondary Data ◽  
Capital Adequacy ◽  
Factors Affecting ◽  
Public Sector Banks ◽  
The Government ◽  
And Performance ◽  
Asset Quality

Public sector banks have been merged by the government in the last few years. This is the rationale behind conducting this study. The purpose of this article is to determine the factors affecting the performance of public sector banks in India and the interrelationship between bank-specific determinants and performance of public sector banks. In this article, we shall analyse the financial data of all the public sector commercial banks for a period spread across 11 years (2009–2019); Capital adequacy, Assets quality, Management efficiency, Earning, and Liquidity (CAMEL) has been used as a performance determinant; system generalised method of moments (GMM) analysis has been used to find the effect of determinants on the performance measurement of public sector banks; and CCA (canonical correlation analysis) has been used to find the interrelationship between the bank-specific determinants and the performance of public sector banks. The finding has important implications in terms of performance in the banking sector. Certain limitations of this study are: It is based on secondary data. The study only covers the financial aspects and not the non-financial aspects. It is found that the asset quality is negatively related with performance of public sector banks. Liquidity and inflation are inversely related to performance of public sector banks in India. Capital adequacy is positively related with banks’ performance, but inversely related with banks’ interest margin. GDP growth has a significant positive impact on banks’ performance, but inversely related with banks’ interest income. Inflation rate is inversely related with banks’ performance. Banking sector reforms are insignificantly related with banks’ performance.

Fish Price Determination Around Lake Victoria, Tanzania: Analysis of Factors Affecting Fish Landing Price

2021 ◽  
Vol 22 (2) ◽  
pp. 348-363
Author(s):  
Damian Boniface Sambuo ◽  
Stephen Kirama ◽  
Kitala Malamsha
Keyword(s):  
Lake Victoria ◽  
Regulatory Body ◽  
Price Determination ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Fish Market ◽  
Fishery Policy ◽  
The Government ◽  
And Performance

Determination of fish landing price is important, as the same contributes to the structure, conduct and performance of the fish market in Lake Victoria. Determination of relevant landing price is a gap to console between fishermen, agents (middlemen), processors and the government. The main objective of this study was therefore to examine fish price determination. Specifically, to examine the methods for fish price determination and analyse factors that affect fish landing price in Lake Victoria, a cross-sectional design was employed, and 300 respondents were randomly selected from two district councils, namely, Sengerema and Buchosa. Both qualitative and quantitative data were analysed using descriptive statistics and inferential analysis. Findings show that landing price is determined through formal negotiation with processors, consultation with other traders, informal negotiation with buyers and Beach Management Unit (BMU). The study concluded that these are the common methods used to determine landing prices. Also, distance from fishing to onshore landing centres, market information channels, age and experiences of the fishermen are the factors significantly found affecting landing price. It is recommended that the mechanism for setting up fishery price, fish market structure, fishery information and the formation of fishery regulatory body needs fishery policy and sector reforms that mark the determination of fish landing price.

scholarly journals Efficiency Analysis of Government Subsidy and Performance Guarantee Policies in Relation to PPP Infrastructure Projects

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Lei Shi ◽  
Yujia He ◽  
Masamitsu Onishi ◽  
Kiyoshi Kobayashi
Keyword(s):  
Government Subsidy ◽  
Performance Guarantee ◽  
Infrastructure Projects ◽  
Special Purpose Vehicle ◽  
Performance Guarantees ◽  
Sustainable Operation ◽  
Integrated Policy ◽  
The Government ◽  
And Performance ◽  
Liquidity Shock

Sustainable operation of public-private partnership (PPP) infrastructure projects that are characterized by considerable external benefits is of vital importance. However, a liquidity shock might trigger an inefficient liquidation of a project by the special purpose vehicle (SPV) and the bank, whose objectives are to maximize the profits generated by the project. This study argues that performance guarantee and subsidy policies implemented by the government play a role in encouraging socially efficient decision-making by the SPV and the bank to ensure the continuation of socially valuable projects. The results show that both government subsidy and performance guarantee policies are effective in avoiding the inefficient liquidation of PPP infrastructure projects when the external benefits are large and certain. However, a performance guarantee policy might lead to inefficient continuation when the external benefits of a project are uncertain. Finally, we discuss the possibility that an integrated policy combining performance guarantees and government subsidies improves the efficiency of a PPP infrastructure project.

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