• 한국물환경학회지
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• 제25권4호
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• pp.553-559
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• 2009

Currently, small scale sewage works are getting increase in Chung Nam Province and it is strongly required for those plants to get the information of optimized procedures and technologies. Most processes for sewage works in Korea were designed for large scale plants, so many difficulties are observed in small scale sewage works. This study was conducted to evaluate the propriety of O&M and construction cost for sewage treatment plants in Chung Nam Province. The treatment results and process stability of 32 public sewage treatment plants were also investigated. It is expected to provide optimum O&M and construction cost for future small scale sewage works and improving projects of existing plants by these results. Pollution problems caused by small scale plants are usually restricted to small areas; however, in view of the high cost per unit population, treatment requirements and alternatives have to be studied carefully. In comparison to larger plants, more pronounced and different boundary conditions such as unstable influent load, per capita costs and a large variety of feasible treatment and disposal systems were considered.

• 대한건축학회연합논문집
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• 제21권6호
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• pp.65-71
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• 2019

In Korea, there is a lack of adequate safety management for small-scale construction work, particularly when compared to large-scale construction projects. The number of construction disasters is also higher on small-scale construction sites. In this regard, this study aimed to develop the application prototype to support the safety management of small-scale construction projects. The major findings of the research are as follows. 1) About 60% of construction disasters and death occurred on small-scale construction sites over the last two years. In addition, institutional support and costs for safety management were found to be insufficient. 2) The items of the application for the small-scale construction safety management were constructed on the basis of the safety management of large-scale construction work. The contents of the application were confirmed based on a survey of small-scale construction project managers. 3) The application algorithm was developed with a focus on the roles of management subjects and information exchange. For transition from the application prototype presented in this study to a commercial product, further research needs to be conducted regarding the reflection of user requirements and application management subjects.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1046-1053
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• 2006

In the large scale recent reclaiming works performed within the wide spatial boundary, evaluation of long-term consolidation settlement and residual settlement of the whole construction area is sometimes made with the results of the limited ground investigation and measurement. Then the reliability of evaluation has limitations due to the spatial uncertainty. Additionally, in case of large scale deep excavation works such as urban subway construction, there are a lot of hazardous elements to threaten the safety of underground pipes or adjacent structures. Therefore it is necessary to introduce a damage prediction system of adjacent structures and others. For the more accurate analysis of monitoring information in the wide spatial boundary works and large scale urban deep excavations, it is necessary to perform statistical and spatial analysis considering the geographical spatial effect of ground and monitoring information in stead of using diagrammatization method based on a time-series data expression that is traditionally used. And also it is necessary that enormous ground information and measurement data, digital maps are accumulated in a database, and they are controlled in a integrating system. On the abovementioned point of view, we developed Geomonitor 2.0, an Internet based real time monitoring program with a new concept by adding GIS and geo-statistical analysis method to the existing real time integrated measurement system that is already developed and under useful use. The new program enables the spatial analysis and database of monitoring data and ground information, and helps the construction- related persons make a quick and accurate decision for the economical and safe construction.

• 한국환경생태학회지
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• 제7권2호
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• pp.207-212
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• 1994

덕유산 국립 공원의 양서류강을 1993년 4월 10일, 1993년 8월 8일부터 9일 두차례에 걸쳐 무주 리조트 골프장건설 지역과 지봉 지역에서 조사하였다. 골프장 건설 지역에서는 도롱뇽, 무당개구리, 두꺼비, 참개구리 및 북방산개구리가 관찰되었고 지봉에서는 꼬리치 레도롱뇽과 북방산개구리가 관찰되어 덕유산 국립 공원 지역에서 발견된 양서류는 환경처가 지정한 특정야생동물 꼬리치레도롱뇽, 도롱뇽, 및 두꺼비 3종을 포함하여 총 2목 4과 5속 6종이었다. 비교적 많은 9개체의 꼬리치레도롱뇽이 관찰된 지봉은 해발고도가 높고 수온이 낮으며 자연환경의 보존상태가 양호하고 인적이 드물어 꼬리치레도롱뇽 서식에 적합한 지역으로 사료되어 그 보호가 요망된다. 다수의 도롱뇽 유생과 2개체의 두꺼비를 포함하여 5종의 양서류가 관찰된 골프장 건설 지역은 공사가 진행됨에 따른 종과 개체수의 격감현상을 볼 수 있었다. 국립공원과 같은 자연환경 지역에서의 대형공사는 생물종 다양성 보존에 크게 역행하는 것으로 자제되어야 할 것이다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.446-449
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• 2003

우리나라의 최근의 건설공사의 형태를 보면 초고층 아파트, 대형 주상복합 건물 등 대형주거용 건축물들이 등장하고 입다. 이러한 건설공사의 대형차 추세에 따라 공사기간, 공사비용 등이 크게 증가하였다. 이에 공사기간 및 공사비용을 절약하고 프로젝트의 성공을 위한 건설관리 기법들의 연구가 활발히 진행되고 있다. 본 연구에서는 초고층 주거건축의 마감공사 중에서 공사규모, 자재의 양중 측면에서 많은 부분을 차지하고 있는 가구공사의 관리체계를 정립하기 위하여, 적시생산(Just-In-Time)방식과 린건설(Lean Construction)의 개념을 도입하였다. 생산성 향상을 위한 위의 두 가기 원리를 이용하여 가구공사의 프로세스를 분석하고 그에 따른 개선방안을 제시하고자 한다. 이러한 분석과 개선방안의 제시는 마감공사의 원활한 흐름을 유도할 수 있으며, 또한 공사기간 및 공사 비용을 절약함으로써 프로젝트의 성공에 기여할 수 있다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 추계 학술논문 발표대회
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• pp.247-252
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• 2009

With the increasing use of tower cranes higher than free standing height, the importance of lateral support is also growing. Since the fall of 43 tower cranes hit by the last typhoon 'Mami' in 2003, regulations and concerns about safety of construction equipment have increased and construction laws regarding lateral support have been strengthened. In Korea, where there are many large-scale apartment housing construction works with the development of new towns, Rope Guying is a more economical construction method than Wall Brace which fixes building structure like building wall and slab. The safety of this Rope Guying is not verified and many construction works are still carried out based on the experience of site managers. There has been no case of construction work where frame and measurements are applied. The objective of this study is to examine the safety of Rope Guying method and ensure the effective implementation of equipment and prevention of disasters.

• 한국해양공학회지
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• 제21권3호
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• pp.26-32
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• 2007

A series of large-scale experiments were carried out in order to examine wave-induced liquefaction in a loosely packed sandbed, its afterward high densification and liquefaction by oscillatory pore pressure. The experiments were conducted in a Large Hydro-Geo Flume that can nearly solve the problems of scale effects of the sandbed, and the 50% sieve diameter of sand was 0.2 mm. The generation of residual pore pressure and its afterward high densification which had observed by Takahashi et al. (1999) in a wave flume experiment using fine sand with the size of 0.08 mm. As a result, the relative density of the sandbed after high densification was increased up to 79% and liquefaction by oscillatory pore pressure was not observed.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1989년도 가을 학술발표회 논문집
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• pp.49-52
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• 1989

This report introduces the large scale prefabricated apartment project in Saudi Arabia designed and built by Hyundai Engineering and construction Co. as turn-key basis from ministry of Public works and ltousing of Saudi Arabia. This project using precast large panel system is 7,600 dwelling unit, total building area 1.8 mil sguare meters. Large panel system is a kind of industrialized building method which classified as monolithic system, total system and structural system. Hyundai Engineering and Construction Co. develop his own prefabricated large panel system for this project and named "HYUNDAI SYSTEM". The key point of this system is vertical and horizontal joints between panels. Also stability of whole building structure is especially important for this kind of prefabricated building. building.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.608-615
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• 2022

Construction projects are large-scale projects that require extensive construction costs and resources. Especially, scheduling is considered as one of the essential issues for project success. However, the schedule and resource management are challenging to conduct in high-tech construction projects including complex design of MEP and architectural finishing which has to be constructed within a limited workspace and duration. In order to deal with such a problem, this study suggests resource and sequence optimization using constraint programming in construction projects. The optimization model consists of two modules. The first module is the data structure of the schedule model, which consists of parameters for optimization such as labor, task, workspace, and the work interference rate. The second module is the optimization module, which is for optimizing resources and sequences based on Constraint Programming (CP) methodology. For model validation, actual data of plumbing works were collected from a construction project using a five-minute rate (FMR) method. By comparing actual data and optimized results, this study shows the possibility of reducing the duration of plumbing works in construction projects. This study shows decreased overall project duration by eliminating work interference by optimizing resources and sequences within limited workspaces.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.54-59
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• 2002

In general, the aluminum extrusions are used to the light construction of the high speed rail vehicle structures. However, the research works ok the crashworthy design of the high speed rail vehicle structures are not published sufficiently because the crash test of high speed rail vehicle structures costs high and is complicated. So, a method that can predict crash characteristics of a large size structure like a high speed tail vehicle should be suggested. In this study, the scale model studies are performed to predict the impact energy absorption characteristics of full scale model. In the first place, we verified the theory of scale law using FE-simulation from the crashworthiness point of view. Secondly, we performed the crush test using scale model, made of aluminum sub structure. As a result, we could predict the crash characteristics using scale model by 10∼20% error.