http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
문성우,김성부,Moon, Sungwoo,Kim, Sungbu 한국건설관리학회 2017 한국건설관리학회 논문집 Vol.18 No.1
가시설 공사는 자연환경에서 영구 구조물에 대한 시공을 수행하기 위해서 필요한 접근공간을 제공한다. 흙막이 공법과 같이 가시설 공사의 안정성을 높이기 위해서는 가시설에 작용하는 외부영향요인을 찾고, 이에 대응하기 위한 설계기능을 구현해야 한다. 즉 외부영향요인이 가시설 성능에 가져오는 영향을 최소화하기 위한 설계요소와 설계요소의 수준을 찾아야 한다. 본 연구에서는 가설공사의 대표적인 공법인 흙막이 공법을 대상으로 가시설 설계시 고려해야 할 외부영향요인을 분석하고, 영향요소를 최소화하기 위한 내부영향요인으로써 설계기능의 개선방안을 제시한다. 설계기능 구현시에는 다구찌 기법을 적용하여 설계요소에 대한 체계적인 평가를 실시하여 가치향상을 분석했다. 적용사례에서는 외부영향요인의 영향을 가장 적게 받으면서 제품특성의 목표치에 가장 근접한 설계인자의 조건을 찾았다. 시범사례에서는 다구찌 기법을 적용하여 흙막이 설계기능을 구현함으로써 외부요인의 변화에 적절하게 대응할 수 있는 설계기능을 제공할 수 있다는 것을 보여줬다. Temporary structures provide the accessible working area when building a permanent building structure in the construction operation. Executed in a natural environment, the temporary structure is prone to the external influence factors of underground water, soil conditions, etc. These factors should be carefully considered in designing the temporary structure. The objective of this study is to apply the external influence factors in designing a more reliable earth retaining wall. The research methodology is based on the Taguchi method that has been studied to improve product quality in the industry. An orthogonal array was developed to analyze the interaction between the external influence factors and the internal influence factors. A sample case study demonstrated that the Taguchi method can be used in planning a more reliable temporary structure for earth retaining walls.
국내 건축공사 흙막이공법 선정을 위한 Stochastic Gradient Tree Boosting 모델에 관한 연구
신윤석(Shin, Yoonseok) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.7
The rise of land prices and population density in urban areas has led to a need for deeper excavations, both for the building ground and the underground. It is difficult to select a retaining wall method that is appropriate for a construction site, not only because the retaining wall method should be chosen at an early stage of a construction project, at which time there is a lack of information on surrounding characteristics of the site, but also because there are uncertain factors such as underground water and the underlying rock formation. An inappropriate retaining wall method may cause changes in the original design or method of retaining wall, resulting in an inevitable increase in construction costs. Despite this fact, construction practitioners generally select a retaining wall method depending on their own limited, subjective experience and intuition. For this reason, in this study, I applied the stochastic gradient tree boosting (SGTB) technique to selecting a retaining wall method to assess the applicability of the technique to a work method selection. To evaluate the SGTB techniques performance, I built the models using NN as well as SGTB and then compared the results between the models. As a result, it was found out that the SGTB is relatively more excellent and stable compared to NN model when it comes to selecting a retaining wall. Consequently SGTB is helpful to practitioners who need to determine the excavation work at building construction project.
임남기 ( Lim¸ Nam-gi ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
As construction projects are gradually getting larger and focusing on building skyscraper with the development of construction technology and the concentration of population in cities, the choice of the soil sheeting works is very important in terms of securing safety and economic feasibility. Further research is planned on the developed concrete guide-based continuous over lap pile method through the introduction of a system that automates vertical management, continuous improvement and supplementation so that the basement soil sheeting wall can be utilized as a building structure.
인접 흙막이 구조물의 지보재 하중을 고려한 가시설의 수치해석
유찬호,유재민,이승주,황정순,백승철 한국지반환경공학회 2018 한국지반환경공학회논문집 Vol.19 No.1
Recently, as the building construction works have been activated, the environment in which the excavation work is proceeding in parallel with the existing structure and the adjacent excavation work is increasing. However, there is not a lot of research on this. In this study, numerical analysis was carried out for interaction analysis between former excavation construction and follow-up excavation on two excavation retaining structures in parallel with excavation. As a result of numerical analysis, if the supporting load of strut is not considered, it was analyzed that the displacement distribution in the structure can be underestimated and acting stress of strut is overestimated. It was analyzed that the support stress causes by the former excavation should be considered in order to simulate the actual behavior characteristic. 최근 건축공사가 활성화됨에 따라 기존 구조물과의 근접한 공사 그리고 인접 굴착공사와 병행하여 굴착공사가 진행되는 환경이 증가하고 있지만 이에 대한 연구는 미흡한 실정이다. 본 연구에서는 두 개의 굴착 흙막이 구조물에 대해 기존 굴착 흙막이 구조물과 후속 굴착 흙막이 구조물 간의 상호작용 분석을 위해 수치해석을 수행하였다. 수치해석 분석결과 선행 굴착으로 인해 작용하는 지보재의 하중을 고려하지 않는 경우 구조물에 발생하는 변위는 과소평가 될 수 있는 것으로 분석되었고, 지보재에 작용하는 응력은 과하게 평가되어 실제 지반의 거동을 모사하기 위해서는 선행굴착으로 인해 발생하는 지보재 응력을 고려해야 하는 것으로 분석되었다.
신경망을 이용한 흙막이 지보공공법 선정모델 개발에 관한 연구
김재엽(Kim Jae-Youp),서장우(Soe Jang-Woo),강경인(Kang Kyung-In) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.5
As a construction project in urban area tends to be high-rise and huge, the importance of the project's underground work, in terms of the cost and the schedule, is increasing gradually. The selection of a suitable shoring method is most important in this underground work. However, in Korea, because the design and the construction parts of the shoring works are separated, many changes of design have occurred and the changes have effects on the cost and the schedule of the project. In this study, we have suggested a decision model for shoring method that can be used to determine the suitable method in planning and design phase of a project. Based on history data, a neural network model was proven to be efficient. The tests of the model for decision of suitable shoring method by using data which were not used in the learning process of neural network showed that accuracy of the selections is up to 77%.
고광노 ( Kwang Ro Go ),이강 ( Ghang Lee ),최명석 ( Myung Seok Choi ) 한국건축시공학회 2008 한국건축시공학회 학술발표대회 논문집 Vol.8 No.1
As the land price in the downtown area increases, buildings are becoming bigger, deeper and higher. Consequently, the importance of underground construction has increased. Although construction engineers make every effort to complete underground construction without any problem, construction failures like landslides and the collapse of a retaining wall occur because of the uncertainty of the soil conditions as well as the unexpected risks of excavation work. In order to prevent potential excavation accidents, it is essential to understand the causes and impacts of such accidents. However, there are only a few examples of construction failures, which show the economic impact on accidents during excavation because of the sensibility of the information. This paper presents two cases of excavation accidents, which were investigated by construction insurance company. The compensation for the accidents paid by the insurance company was compared with the estimated costs calculated based on the estimation method for excavation accidents proposed by our previous study. The comparison results showed that the estimate calculated by our method was much less than the actual compensation because the estimate solely focused on the construction costs whereas the compensation included other external factors.