• 제목/요약/키워드: Underground Works

검색결과 199건 처리시간 0.029초

철골세우기 작업의 영향요인별 현장생산성 측정 및 분석 (Productivity Measurement and Analysis on Factors in Steel Erection)

  • 허영기;이지용;윤석헌;태용호;안방률
    • 한국건축시공학회지
    • /
    • 제9권2호
    • /
    • pp.31-38
    • /
    • 2009
  • In today's construction industry, buildings have been more complicated and higher, the demands of steel works have been increasingly concerned, which makes the schedule planning and management more significant. However, in actual construction sites, management is more based on a manager's construction experience than productivity data accumulated in previous projects. Moreover, most of the existing studies also featured a theoretical approach rather than an analysis of data straightforwardly collected in sites. In this study, a steel-erection site was visited to collect productivity data. The study found that there were significant disparities between aboveground work productivity and underground work; one tower crane operated work and two tower crane operated; and work productivity conducted in clear weather condition, cloud and rainy. However, the productivities of 'first node on ground' and 'second node on ground' were estimated similar. The productivity data collected and factors affecting the productivity will help managers to plan and control their similar steel-erection works. This study will also be beneficial for those performing related studies.

GIS 및 지구통계학을 이용한 실시간 통합계측관리 프로그램 개발 (Development of Real Time Monitoring Program Using Geostatistics and GIS)

  • 한병원;박재성;이대형;이계춘;김성욱
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2006년도 춘계 학술발표회 논문집
    • /
    • pp.1046-1053
    • /
    • 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.

  • PDF

IoT를 이용한 지하매설물관리용 지능형표지기(IMI) 기술개발에 관한 연구 (A Study on the Development of Intelligent Markup Indicator (IMI) Technology for Underground Facilities Management Using IoT)

  • 김태달
    • 한국인터넷방송통신학회논문지
    • /
    • 제17권3호
    • /
    • pp.129-136
    • /
    • 2017
  • 과거 지리정보시스템 GIS(Geographic Information System)의 활용영역이 정부와 몇몇 공공분야에 국한돼 있었으나, 최근 모바일, CRM(Customer Relationship Management) 등 다른 영역과 결합하면서 시장이 다양해지고 있다. 21세기 GIS기술의 발전방향은 GIS응용시스템 개발 및 공간정보 서비스를 위한 제반 기술로서 웹 GIS, 3차원 GIS, 모바일 GIS, LBS 등을 들 수 있다. 본 연구에서는 기존에 사용하고 있는 지하매설물 관련 표지못의 단순 위치파악 기능에서 탈피해서 새로운 개념의 표지못(지능형 저장 메모리장치를 내장한 표지못)을 개발해서, 현장에서 지하매설물관련 정보 (설치일자, 매설 깊이, 배관 두께, 배관 재질, 관리기관, 시공자, 연락처 등)를 입력하고 DB서버에 저장해서, 필요하면 적시. 적소에서 활용할 수 있게 한다. 본 연구를 통해 무분별한 굴착기 공사 등으로 야기되는 각종 사고를 미리 방지하고, 최소화 할 수 있으며, 싱크홀 관련 대책 수립을 위한 정보제공 등. 지하매설물관리를 체계적이며, 신뢰성 있는 정보 제공이 가능하도록, 현장에서 편리하게 정보를 입력할 방안을 제시함으로써, 지하 매설관로 사고를 절대적으로 감소시킬 수 있도록 하는 목적을 두고 연구 개발하였다.

머신러닝 기반의 실시간 자동화계측 데이터 분석 기법 연구 (A Study on Machine Learning-Based Real-Time Automated Measurement Data Analysis Techniques)

  • 최정열;한재민;안대희;정지승;김정호;이성진
    • 문화기술의 융합
    • /
    • 제9권1호
    • /
    • pp.685-690
    • /
    • 2023
  • 도시의 인구증가 및 고밀화에 따라 기존 지하구조물에 인접하여 대심도 굴착 공사 물량이 증가하는 추세인 것으로 분석되었다. 현재 지하구조물 및 궤도는 외부요인에 의해 지하구조물의 손상이 다수 발생되는 실정이며 터널 내의 계측결과로 원인을 분석하여 예방차원이 아닌 사후처리에 대해서 측정을 하고 있는 실정이다. 본 연구의 목적은 공용중인 도시철도 선로와 인접한 굴착공사에 따른 구조물의 변형에 미치는 영향을 분석하는 것이다. 또한 외적 요인으로 인해 지하구조물 및 궤도 손상 및 파괴가 발생하기 전 구조물의 변위를 머신러닝 기법을 통해 구조물의 안전성을 평가하고자 한다. 분석결과, 분석한 데이터세트에서 구조물관리기준치에 도달하는 시간을 예측하기에 적합한 모델은 다항회귀 머신러닝 알고리즘인 것으로 분석되었다. 그러나 본 연구에서 적용한 자동화계측 데이터에 한정될 수 있으므로 추가적으로 구조물 조건의 다양성과 데이터양을 늘리는 향후 연구가 필요하다.

파형강판 지중암거의 시공상 문제점 및 보완에 대한 고찰 (The Study on problems in Construction of Corrugated Steel Underground Culverts and Complementary Measures Thereof)

  • 정영화;성유경;장동휘
    • 산업기술연구
    • /
    • 제28권A호
    • /
    • pp.133-140
    • /
    • 2008
  • The Corrugated steel plate structure(CPS) can be applied to construction sites with various purposes, and the merits of CPS such as economical efficiency and swiftness can be utilized when it is constructed properly in consideration of its characteristics. However, in Korea, since the history of corrugated steel plate culvert is relatively short, there are not enough design standards. This research is prepared for finding out the causes through examining and analyzing the problems based on the examples from the existing constructions. Moreover, this study can be utilized in preparing designs and design standards of corrugated steel plate culvert in the future and devising prevention measures and complementary measures by studying construction methods considering features of construction sites and circumstances, several points to be considered while carrying out construction works and prevention measures of a problem with the existing structures.

  • PDF

암반굴착에 따른 발파진동과 브레이커진동의 특성에 관한 연구 (A Study on the Characteristics of Blasting Vibration and Breaker Vibration by Rock Excavation)

  • 임한욱;박현성
    • 산업기술연구
    • /
    • 제22권A호
    • /
    • pp.107-117
    • /
    • 2002
  • The blast works for open cuts and underground constructions near urban areas have recently increased complaint of ground vibration, air blast and fly rock. In order to reduce these problems, it is necessary to develop more cautious blasting, or non-blast excavation methods by mechanical power. For these breaker workings instead of blast are sometimes adopted. To compare the characteristics of blast vibration with breaker vibration, the level, range of frequency and spectrum amplifications of each vibration were studied.

  • PDF

장대 터널의 계획과 설계 (Construction Planning and Design of a Long Tunnel)

  • 장석부;윤영훈;김용일;김진한
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2000년도 봄 학술발표회 논문집
    • /
    • pp.117-124
    • /
    • 2000
  • This paper presents the construction planning and the detail design of a 16.2 km long railroad tunnel in a mountainous area. Major design conditions for railroad are the single track, loop-typed alinement, and a maximum grade of 24.5$\textperthousand$. A underground station(double track) with a length of 1.1km is located in the middle of the line for train cross-passing. Tunnel is excavated in highly complex geological conditions including faulted areas, abandoned mine works areas, and various rock types such as sandstone, shale, limestone, and coal seam partly. Drilling and blasting method was adopted because it is more flexible than TBM(Tunnel Boring Machine) as a result of risk assessment for geological conditions in this area. Two working adits were planned to adjust the construction schedule and can be used for ventilation and maintenance in operation phase. New material and concept were introduced to the tunnel drain design. They are expected to improve tunnel drain condition and capability. Rational tunnel support design was tried to consider the various tunnel size and purpose and to use the geological investigation results.

  • PDF

Alpha center를 이용한 전기비저항 수치 모델링 : 현장 탐사 자료에 대한 적용 예 (Numerical Resistivity Modeling Using Alpha Center Theory: A Case History for Field Resistivity Data)

  • 윤왕중
    • 터널과지하공간
    • /
    • 제7권4호
    • /
    • pp.334-340
    • /
    • 1997
  • Alpha center theory which was first proposed by Stefanescu has been proved to be effective for the detection of the location of the conductive orebody. A numerical forward modeling was conducted to verify the effectiveness of this method. Field works were carried out along the three profiles in two different areas for the purpose of finding fractured zone which might be accompanied with the presence of the groundwater. And the results were modeled by alpha center method, which was later testified by wellproven 2-dimensional finite difference inversion scheme. Field data could be successfully modeled with this alpha center algorithm, especially for the smooth-varying resistivity models. For the abrupt change of the resistivity values, the alpha center coefficients have a tendency to be negative to simulate the steep resistivity gradients. This method is quite simple and easy for the future applications. The numerical calculation can be performed very quickly with the personal computers.

  • PDF

플라즈마 발파의 폭력과 지반진동특성 (Analysis of Energy and Ground Vibration of Plasma Blasting)

  • 이경운;박철환;신중호;류창하
    • 터널과지하공간
    • /
    • 제7권4호
    • /
    • pp.267-273
    • /
    • 1997
  • Rock fragmentation with plasma blasting technique has advantageous properties in contrast to the conventional blasting method in controlling of flying rocks and ground vibrations, when residents are complaining or surrounding structures stay in protection from blasting operations. The experiences show in urban construction works that the plasma blasting is the most possible method to prevent damages and minimize adverse environmnetal impacts. The fragmentation energy level is evaluated by numerical simulation using PFC-2D for various drill hole pattern and tested accordingly to get the feasibility. The energy output of plasma blasting system has been improved to a level of 1 MJ, which can break a 2~3 ㎥ granite boulder or 1.5 m height bench face. Measurements are carried out to get the ground vibration level and propagation equation, so that the control of the blasting operations can be performed more precisely and safely.

  • PDF

개선된 탄소성 해석을 이용한 버팀지지 흙막이벽의 거동비교 (Comparison of Displacement of the Braced Retaining Wall by Developed Elasto-Plastic Analysis)

  • 신진환;김동신
    • 한국안전학회지
    • /
    • 제19권2호
    • /
    • pp.112-118
    • /
    • 2004
  • Recently, when being constructed the large structures, the deep excavations have performed to utilize the underground space. As the ground excavation is deeper, the damage of the adjacent structure and the ground is frequently occurred. the Analysis of the retaining structures is necessary to safety of the excavation works. There are many methods such as elasto-plastic theory, FEM, and FDM to analyze the displacement of the retaining structure. In this thesis, GEBA-1 program by the Nakamura-Nakajawa elasto-plastic method was developed. The lateral displacement of the wall was analyzed by the developed program GEBA-1, SUNEX, and EXCAD, and compared with the measured displacement bye the Inclinometer. The monitored fields were three excavation work site in S-I, S-II, and S-III area. Excavation method of each site is braced retaining wall using H-pile. Excavation depth is 14m, 14m, and 8.2m.