Geomechanical design aspects and construction experience in excavating the overburden above a masonry tunnel of the Ittertunnel in Tirol/Austria

2010 ◽  
pp. 529-532
Keyword(s):  
Construction Experience

Ecological Construction Experience Analysis on Traditional Houses of Dong Inhabit Villages in Sanjiang, Guangxi

2011 ◽  
Vol 71-78 ◽  
pp. 3586-3590
Author(s):  
Qun Chen ◽  
Yan Bing Ye
Keyword(s):  
Sustainable Development ◽  
Human Society ◽  
Man And Nature ◽  
Construction Experience ◽  
Ecological Thought ◽  
Ecological Construction

Constructions in Dong inhabit houses respond to the cosmopolitan ecological thought “Man and nature live in harmony” with landscape of simplicity, nature and unity of heaven and humanity. It is not only Chinese nation’s cultural treasure but also a distinguished one in the art of architectural world which forms going through long-term choice and elimination of nature and human society and includes many reasonable ecological construction experience. This paper summarizes its ecological construction experience by researching traditional houses of Dong inhabit villages in Sanjiang, Guangxi to provide guidance for local architectural creation and sustainable development of villages.

scholarly journals SIMILARITY ASSESSMENT OF COUNTRIES TO FACILITATE LEARNING FROM INTERNATIONAL CONSTRUCTION PROJECTS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Beste Ozyurt ◽  
Gozde Bilgin ◽  
Irem Dikmen ◽  
M. Talat Birgonul
Keyword(s):  
Construction Projects ◽  
Online Questionnaire ◽  
Political Condition ◽  
Similarity Assessment ◽  
International Construction ◽  
Related Information ◽  
Financial Condition ◽  
Governance Systems ◽  
Construction Experience ◽  
The Right

Companies’ ability to learn from projects is a source of competitive advantage in project-based industries. Learning from experiences in international markets is particularly important for global contractors so that the right bidding strategy can be developed, effective project governance systems can be established, and similar mistakes are not repeated. In this study, we assert that countries can be clustered according to their similarity so that experiences gained in these markets can be transferred and adapted to forthcoming projects. Thus, similarity factors to be used for clustering of countries can be identified, and a methodology can be developed to store, retrieve and reuse country-related information in international construction projects. In this paper, we report the factors identified for similarity assessment of countries to be used to facilitate learning from projects. As a result of literature review, interviews with experts and an online questionnaire administered to company professionals who have international construction experience, 12 factors have been identified for clustering of countries. As a result of ranking analysis; factors of “development level of and culture in the construction industry”, “political condition of the country” and “financial condition of the country” are obtained as the most important factors. The identified factors will be explained and how the clustering of countries can help companies to extract valuable information from previous experiences will be discussed.

scholarly journals SSC Superconducting Dipole Magnet Cryostat Model Style B Construction Experience

1989 ◽  
Author(s):  
N. Engler ◽  
R. Bossert ◽  
J. Carson ◽  
J. Gonczy ◽  
E. Larson ◽  
...  
Keyword(s):  
Dipole Magnet ◽  
Construction Experience

scholarly journals EPISTEMOLOGY, CONSTRUCTIVISM, AND DISCOVERY LEARNING IN MATHEMATCS

2013 ◽  
Vol 1 (1) ◽  
pp. 104
Author(s):  
I Ketut Sukarma
Keyword(s):  
Educational Research ◽  
Learning Process ◽  
Teaching And Learning ◽  
Cognitive Structure ◽  
Discovery Learning ◽  
Philosophical Approach ◽  
Conflict Situations ◽  
The World ◽  
Construction Experience ◽  
The Relationship

This article describes the epistemology of mathematical scholarship, the constructivism view of mathematics and how mathematical learning can achieve the goals of which one is by studying discovery with a philosophical approach that emphasizes its implications on the learning of mathematics. The world of educational research, especially mathematics has shown a shift, which is more emphasize the teaching and learning process and research methods that apply the concept that, in learning someone to construct his knowledge. Humans construct their knowledge through interaction with objects, phenomena, experiences, and the environment. A knowledge is assumed to be true if it can be useful to confront and solve appropriate problems or phenomena. On constructivism view, knowledge can not be transferred from one person to another, but must be interpreted by one person individually. Knowledge is not something that is finished, but a process that develops continuously. In the process that the activity of someone who wants to know, very instrumental in the development of knowledge. Some factors such as limited previous construction experience, and a person's cognitive structure may limit the establishment of the person's personality. Conversely, conflict situations or anomalies that make people forced to think more deeply and situations that require people to defend themselves and explain in more detail, will develop one's knowledge. Constructivism is divided into three levels: radical, hypothetical realism, and the usual. This difference is based on the relationship between knowledge and existing reality.

Study on the Method of Construction of Large Section Tunnel Crossing the Ancient Great Wall

2012 ◽  
Vol 226-228 ◽  
pp. 1504-1508
Author(s):  
Ai Bing Jin ◽  
Long Fu Li ◽  
Fu Gen Deng ◽  
Min Zhe Zhang
Keyword(s):  
High Efficiency ◽  
Surface Deformation ◽  
Ground Deformation ◽  
Three Dimensional ◽  
Horizontal Displacement ◽  
Tunnel Excavation ◽  
Construction Scheme ◽  
Construction Experience ◽  
Strata Deformation ◽  
Great Wall

While the tunnel crossing the ancient Great Wall, we must take effective measures to control ground deformation, prevent ground deformation is too large, destroying the heritage. In order to study the effects of tunnel excavation types on strata deformation, a three-dimensional computational model is built to simulate surface settlement and horizontal displacement by three different excavation types which are both-side heading method, CRD method, and hole pile method. Following comparative analysis, in line with the realistic program is recommended. The results show that both-side heading method can better control the surface deformation, and has a high efficiency of construction, which was selected as the construction scheme of tunnel crossing the ancient great wall. The results of this study are expected to provide construction experience to the works of a similar background.

Application of factory-applied epoxy coatings for corrosion protection of buried trunk pipelines

2021 ◽  
pp. 293-303
Author(s):  
Александр Михайлович Ефремов ◽  
Петр Дмитриевич Волянский ◽  
Павел Олегович Ревин ◽  
Сергей Владимирович Ануфриев
Keyword(s):  
Corrosion Protection ◽  
Oil And Gas ◽  
Raw Materials ◽  
Epoxy Coating ◽  
Economic Feasibility ◽  
Directional Drilling ◽  
Epoxy Coatings ◽  
The Usa ◽  
Construction Experience ◽  
Main Production

При сооружении трубопроводов в России, странах Европы и Африки наиболее распространенным является применение труб с трехслойными полиэтиленовыми покрытиями. В то же время опыт строительства магистральных нефте- и газопроводов в США, Канаде, ряде других стран свидетельствует о возможности использования эпоксидных покрытий в качестве эффективной антикоррозионной защиты труб. В этой связи была начата научно-исследовательская работа по определению целесообразности применения двухслойных эпоксидных покрытий для антикоррозионной защиты магистральных трубопроводов подземной прокладки, эксплуатируемых организациями системы «Транснефть». Цель настоящего исследования - оценка технической и экономической целесообразности использования эпоксидных покрытий как альтернативы полиэтиленовой изоляции трубопроводов. Были проведены лабораторные исследования образцов трех систем эпоксидных покрытий, осуществлен сравнительный анализ технических свойств эпоксидной и полиэтиленовой изоляции. Установлено, что эпоксидные покрытия превосходят полиэтиленовые по ряду свойств, в частности обладают повышенной стойкостью к температурным воздействиям, УФ-излучению, катодному отслаиванию, а также повышенной механической прочностью, что позволяет обеспечить сохранность покрытия при строительстве трубопроводов методом наклонно-направленного бурения и прокладке в скальных грунтах. Основные мощности по производству сырья для эпоксидных порошковых покрытий локализованы в России, в то время как сырье для полиэтиленовых покрытий в основном производится за рубежом. Установлена экономическая целесообразность применения двухслойного эпоксидного покрытия как альтернативы трехслойному полиэтиленовому покрытию для трубопроводов больших диаметров - более 720 мм. Для внедрения труб с двухслойным эпоксидным покрытием на объектах ПАО «Транснефть» проводится его апробация, включающая строительство опытного участка трубопровода. When constructing pipelines in Russia, Europe, and Africa, it is the most common to use pipes with threelayer polyethylene coatings. At the same time, the oil and gas pipeline construction experience in the USA, Canada, and a number of other countries, as well as the construction of the Zapolyarye - Purpe elevated main pipeline by Transneft PJSC, indicates the possibility of using epoxy coatings as an effective pipe corrosion protection solution. In respect thereof, research study to determine the feasibility of using two-layer epoxy coatings for corrosion protection of underground pipelines operated by the Transneft system entities was instituted. The purpose of this study is to assess the technical and economic feasibility of using epoxy coatings as an alternative to polyethylene insulation of pipelines. Laboratory studies of samples of three epoxy coating systems, as well as a comparative analysis of the process properties of epoxy and polyethylene insulation were conducted. It has been established that epoxy coatings are superior to polyethylene coatings in a number of properties, in particular, they are characterized by increased resistance to temperature effects, UV radiation, cathodic disbondment, as well as increased mechanical strength, which makes it possible to ensure safety of the coating during the construction of pipelines by directional drilling and laying in rocky soils. The main production facilities for raw materials for epoxy powder coatings are localized in Russia, while raw materials for polyethylene coatings are mainly produced abroad. The economic feasibility of using a twolayer epoxy coating as an alternative to a three-layer polyethylene coating for pipelines of large diameters (over 720 mm (28 in)) was established. Testing for the introduction of pipes with a two-layer epoxy coating at the Transneft PJSC facilities is being performed, including construction of an experimental pipeline section.

scholarly journals Evaluating Supplier Management Maturity in Prefabricated Construction Project-Survey Analysis in China

2018 ◽  
Vol 10 (9) ◽  
pp. 3046 ◽  
Author(s):  
Kangning Liu ◽  
Yikun Su ◽  
Shoujian Zhang
Keyword(s):  
Corporate Social Responsibility ◽  
Supply Chain ◽  
Social Responsibility ◽  
Construction Project ◽  
Supplier Management ◽  
Operation Efficiency ◽  
Two Samples ◽  
Strategy Alignment ◽  
Construction Experience ◽  
Corporate Social

Prefabrication is considered as a modern method of construction, transferring part of on-site work into factories and generating a new decoupling point in supply chain. Management of prefabricated component (PC) suppliers plays a key role in the performance of prefabricated construction project (PCP). Evaluating and improving supplier management maturity (SMM) become critical issues for large contractors. Previous research on PCP supply chain mainly focused on technology, process and performance aspects, while paying little attention to supplier relationship management. This study proposes an assessment criteria system of supplier management from five dimensions, including procurement process, operation efficiency, relationship coordination and strategy alignment and corporate social responsibility. A maturity grid with five levels is designed to present continuous improvement of supplier management. 34 large PCP construction firms listed in contractor directory were investigated in China through semi-structured interview and questionnaire survey. Independent two-samples t-test and one-way analysis of variance were adopted to explore SMM of different groups according to business scope, procurement method and construction experience. The results indicate that the overall maturity level of supplier management is relatively low, implying that supply activity cannot achieve inter-organization integration. Management on relationship coordination and strategy alignment lag behind procurement management and operation efficiency. Single business contractors have higher SMM than diversified ones. Contractors integrated in engineering, procurement and construction are superior to design-bid-build contractors in supplier management, especially in relationship coordination and strategic alignment. Construction experience is conductive to supplier operation efficiency. Noticeably, there are no statistically significant differences in the performance of corporate social responsibility among different groups. These results will contribute to developing a benchmark framework for contractors to evaluate SMM and achieve continuous improvements in PCP.

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