• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2005년도 춘계 학술발표회 논문집
• /
• pp.1299-1306
• /
• 2005

The introduction of geodetic methods of absolute displacement monitoring in tunnels has improved the value of the measurements significantly. By using this method, structurally controlled behavior and influences of an anisotropic rock mass can be determined and the excavation and support adjusted accordingly. In this study cases of tunnel monitoring in anisotropic/heterogeneous rock masses are analyzed, and various anisotrpic behavior of tunnel can be estimated. Because rock anisotropy and heterogeneity can have great influence on tunnel behavior, tunnel design considering rock anisotropy and heterogeneity is needed. Also under construction, feedback must be performed by using face mapping and monitoring to prevent over-deformation and tunnel collapse.

• 한국안전학회지
• /
• 제33권6호
• /
• pp.115-122
• /
• 2018

This study examined the effect of safety leadership coaching program on managers' safety management and workers' safety behaviors in construction site. Three or four managers and about one hundred workers at each site participated in this study. Safety leadership coaching program consisted of safety leadership education, goal setting, self-monitoring and feedback on workers' safety behavior, reward for three safety management behaviors; (1) safety observations of workers safety behavior and (2) providing positive feedback on safe behavior (3) providing corrective feedback on risk behavior and daily safety education for workers. Dependent variables were the percentage of safe behaviors of workers and frequency of managers' safety management behaviors. A nonconcurrent AB multiple baseline design across settings was adopted. After baseline(A), safety leadership coaching program (B) was introduced to each site. The results showed that safety leadership coaching program was effective to increase managers' and workers' safety behaviors. These results suggest that safety leadership coaching program developed in this study would be an alternative treatment technique to improve construction safety management. In addition, the implications, limitations of this study, and future studies are discussed.

• 한국농공학회논문집
• /
• 제52권4호
• /
• pp.45-52
• /
• 2010

The purposes of this research are to analyze the internal settlement behavior of Concrete Faced Rockfill Dam (CFRD) typed 'D dam' and to evaluate the stability of the 'D dam' during dam construction using internal settlement measurements and results of numerical analysis. The field measurements were obtained during dam construction period. The numerical analysis was also carried out for the same construction period. The numerical analysis focused mainly on prediction of stress and displacement behavior of 'D dam' during dam construction stage using input parameters obtained from laboratory tests, i.e. large triaxial tests. The behavior of 'D dam' was evaluated to be stable from comparing the results of field measurements and numerical analysis. A simple empirical equation is also presented to predict final settlement at the completion of dam construction, using settlement measurement monitored during dam embankment.

• Geomechanics and Engineering
• /
• 제15권3호
• /
• pp.911-917
• /
• 2018

This paper concerns a numerical investigation on the effect of construction sequence on three-arch (3-Arch) tunnel behavior. A three-arch tunnel section adopted in a railway tunnel construction site was considered in this study. A calibrated 3D finite element model was used to conduct a parametric study on a variety of construction scenarios. The results of analyses were examined in terms of tunnel and ground surface settlements, shotcrete lining stresses, loads and stresses developed in center column in relation to the tunnel construction sequence. In particular, the effect of the side tunnel construction sequence on the structural performance of the center structure was fully examined. The results indicated that the load, thus stress, in the center structure can be smaller when excavating two side tunnels from opposite direction than excavating in the same direction. Also revealed was that no face lagging distance between the two side tunnels impose less ground load to the center structure. Fundamental governing mechanism of three-arch tunnel behavior is also discussed based on the results.

• 국제학술발표논문집
• /
• The 5th International Conference on Construction Engineering and Project Management
• /
• pp.517-520
• /
• 2013

In construction operation, the temporary structure is used to support designed facilities or to provide work spaces for construction activities. Since the structure is used only during the construction operation, the operation may be given insufficient attention. The contractor is likely to try to save cost on the material and labor cost. This contractor's behavior frequently leads to construction accidents. In order to prevent accidents from the failure, the operation should be carefully monitored for identifying the effect of dynamics in the surrounding site area. Otherwise, any unexpected adversary effect could result in a very costly construction failure. This study presents the feasibility of the ubiquitous sensor network (USN) technology in collecting construction data during the construction operation of earth retaining walls. The study is based on the result at the Construction System Integration Laboratory (CSIL) at the Pusan National University. A USN-based system has been developed for monitoring the behavior of the temporary structure of earth retaining walls. The data collected from the sensors were used to understand the behavior of the temporary structure. The result of this study will be used in increasing the safety during the construction operation of retaining walls.

• 한국건설관리학회논문집
• /
• 제19권6호
• /
• pp.135-143
• /
• 2018

건설 프로젝트를 성공하기 위해서는 핵심 이해관계자인 발주자와 시공사의 협력적 관계가 무엇보다 중요하다. 거래 상대방의 행동에 영향을 미치거나 통제 할 수 있는 권력은 건설 프로젝트에서 이해관계자간에 협력적인 행동을 유발 할 수 있는 요소로 간주될 수 있다. 또한, 거래 비용 이론에 따르면 계약은 효과적으로 거래 상대방의 행동에 영향을 미친다. 권력에 추가하여 계약 또한 시공자의 협력적 행동을 설명 할 수 있는 요소라고 할 수 있다. 건설 프로젝트에서 시공사의 협력적 행동을 유발하기 위해 발주자의 권력이 유효한 영향력을 미치는지는 매우 흥미로운 주제이다. 한편, 계약의 기능에 대한 심층적인 이해는 성공적인 건설 프로젝트 관리에 있어 필수적인 부분이다. 본 연구에서는 국내 건설 프로젝트에서 발주자의 권력 및 계약의 기능과 시공자의 행동 사이의 매커니즘을 탐색 해 보고자 한다.

• 한국의류학회지
• /
• 제29권9_10호
• /
• pp.1285-1294
• /
• 2005

This study was fulfilled in the purpose of proposing construction strategies of Internet shopping-mall through the analysis of consumer moving line in Internet shopping-mall. This study was executed in two stages: theoretical study, qualitative study. In the theoretical study, hypothetical Internet shopping behavior model were constructed. Five internet shopping behavior types of apparel : purchase, searching purchase, prepurchase deliberation, information accumulation, opinion leadership and recreation were constructed. Next, consumer decision process were extracted from previous studies and a hypothetical internet shopping behavior model was constructed on the base of consumer decision process and Internet shopping behavior types. And then, through the qualitative study, Internet shopping behavior types were identified and hypothetical model was confirmed after adjustment. For qualitative study, 30 subjects were sampled by focus sampling and investigated by in-depth interview and observation. Seven internet shopping behavior types of apparel were found by the qualitative study: cautious purchase by price comparison, searching purchase, special low price purchase, impulse purchase, prepurchase deliberation, information accumulation and recreation-oriented. On the base of these behavior types, Internet shopping behavior model was adjusted and completed. Finally, according to the results of this study, Internet shopping construction methods that made customer's loyalty high and marketing strategy of Internet shopping-mall were proposed.

• 한국직업건강간호학회지
• /
• 제23권1호
• /
• pp.28-38
• /
• 2014

Purpose: This research is a correlative study to assess the relationships of musculoskeletal subjective symptoms disorders and health promotion behavior of the daily plant construction workers. Methods: The subjects were comprised of 306 daily plant construction workers by self-reported questionnaires on October 19, 2011. The instruments used for this study were musculoskeletal subjective symptoms disorders (NIOSH) and health promotion lifestyle profile II (HPLP-II). The data were analyzed using SPSS/WIN 14.0. Results: The scores of health promotion behavior of daily plant construction workers were 2.13, and the scores of health promotion behavior were significantly different depending on gender (t=-2.51, p=.013), religion (t=3.10, p=.002), owning house (t=2.59, p= .010), exercise (t=6.01, p<.001), time to rest during work (t=2.21, p=.027), and work satisfaction (F=8.97, p<.001). The musculoskeletal subjective symptoms disorders attack rate was 90.5%. The results of the correlative study to assess relationships showed significant negative correlation between musculoskeletal subjective symptoms disorders and health promotion behavior (r=-1.45, p=.011). Conclusion: The results of the study showed that it was lower level of health promotion behavior level. Therefore, to increase the health promotion behavior of the daily plant construction workers, a great deal of efforts are required at the level of the government, employers and workers.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2002년도 가을 학술발표회 논문집
• /
• pp.3.2-27
• /
• 2002

This paper presents the status of dam construction in Korea, along with a brief assessment of the dam design and construction practice. The assessment is based on publically available design and construction records of the major existing rockfill dams which have been constructed since early 1970's, and focussed in identifying geotechnical characteristics of design and construction parameters of the dams. Though the assessment, two representative dams, having unique geotechnical characteristics, are selected for comprehensive comparison of their geotechnical engineering behavior during construction and operation. The comparison yields very interesting findings on the effects of various design and construction parameters on dam behavior.

• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.10-14
• /
• 2015

Unsafe behavior is one of the major causes of construction accidents. Managing the behavior of workers in real-time is difficult and requires huge manpower. In this paper, a new real-time locating framework is proposed to improve safety management by collecting and analyzing data describing the behavior of workers to identify habits that may lead to accidents. The aim of the study is to identify working habits of workers based on their location history. Location data is used to compare with that of other workers and equipment. The results indicate that the reuse of real-time location data can provide extra safety information for safety management and that the proposed system has the potential to prevent struck-by accidents and caught-in between accidents by predicting unwanted interaction between workers and equipment. This adds to current research aimed at automating construction safety to the point where the continuous monitoring, managing and protection of site workers on site is possible.