https://www.scipedia.com/wd/index.php?action=history&feed=atom&title=Tran_Nguyen_2014aTran Nguyen 2014a - Revision history2026-05-09T11:17:35ZRevision history for this page on the wikiMediaWiki 1.27.0-wmf.10https://www.scipedia.com/wd/index.php?title=Tran_Nguyen_2014a&diff=208208&oldid=prevScipediacontent: Scipediacontent moved page Draft Content 184031534 to Tran Nguyen 2014a2021-02-03T19:40:33Z<p>Scipediacontent moved page <a href="/public/Draft_Content_184031534" class="mw-redirect" title="Draft Content 184031534">Draft Content 184031534</a> to <a href="/public/Tran_Nguyen_2014a" title="Tran Nguyen 2014a">Tran Nguyen 2014a</a></p>
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</td></tr></table>Scipediacontenthttps://www.scipedia.com/wd/index.php?title=Tran_Nguyen_2014a&diff=208207&oldid=prevScipediacontent: Created page with " == Abstract == Sewer construction in urban areas often has significant impacts on work zone traffic control, traffic flow, and safety. Contractors typically introduce night..."2021-02-03T19:40:30Z<p>Created page with " == Abstract == Sewer construction in urban areas often has significant impacts on work zone traffic control, traffic flow, and safety. Contractors typically introduce night..."</p>
<p><b>New page</b></p><div><br />
== Abstract ==<br />
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Sewer construction in urban areas often has significant impacts on work zone traffic control, traffic flow, and safety. Contractors typically introduce night shifts to meet contract schedule and to reduce traffic congestion. However, there is a lack of understanding of how shift work is associated with labor productivity in sewer construction. This research investigated labor productivity of ten major activities in sewer and drainage construction in Ho Chi Minh City, Vietnam when these activities were performed in both day and night shifts. Levene’s tests and t-tests were employed to analyze the data and investigate the research hypothesis. Results revealed that four activities were significantly sensitive to shift work and the other six activities were not. Pavement cutting and timber piling activities had higher productivity in day shifts. In contrast, steel sheet piling and manhole concreting were more productive in night shifts. Labor productivity of excavation, formwork installation, rebar fabrication/installation, pipe installation, sand filling, and asphalt pavement was not significantly different between the two shifts. The results were verified by the experienced site managers/engineers through structured interviews. The findings form this paper help contractors effectively manage their sewer projects by allocating resources appropriately to construction activities between the day and night shifts.<br />
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== Original document ==<br />
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The different versions of the original document can be found in:<br />
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* [http://pdfs.semanticscholar.org/5b44/2067755cc12b9e0b2b8eba272782ba2a20ed.pdf http://pdfs.semanticscholar.org/5b44/2067755cc12b9e0b2b8eba272782ba2a20ed.pdf]<br />
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* [http://ascelibrary.org/doi/pdf/10.1061/9780784413517.090 http://ascelibrary.org/doi/pdf/10.1061/9780784413517.090],<br />
: [http://dx.doi.org/10.1061/9780784413517.090 http://dx.doi.org/10.1061/9780784413517.090]<br />
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* [https://ascelibrary.org/doi/pdf/10.1061/9780784413517.090 https://ascelibrary.org/doi/pdf/10.1061/9780784413517.090],<br />
: [http://sipb.sggw.pl/CRC2014/data/papers/9780784413517.090.pdf http://sipb.sggw.pl/CRC2014/data/papers/9780784413517.090.pdf],<br />
: [https://academic.microsoft.com/#/detail/2127197939 https://academic.microsoft.com/#/detail/2127197939]</div>Scipediacontent