• Title, Summary, Keyword: 토공측량

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An Application of VRS-RTK Surveying in Construction Site (건설현장에서의 VRS-RTK측량 적용성 검토)

  • Kim, In-Seup;Joo, Hyun-Seung
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.26 no.6
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    • pp.625-631
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    • 2008
  • Correct evaluation of cut and fill volume of soil is one of the most important factors which controls construction cost in enormous construction sites. To achieve accurate computation of soil volume in construction site precise surveying is required, however most of construction sites adopt existing optical surveying instruments such as Total Station. The problem when using these optical instruments in construction sites is that these instruments take longer time in data acquisition. Due to insufficiency of computation time accurate and precise observation cannot be accomplished with these equipments. As a result roughly calculated earthwork volume may cause arguments between contractors and supervisors in the matter of reduction or increasement of total construction cost. In this study VRS-RTK Surveying is adopted to perform fast and accurate in-situ surveying for rapid computation of soil volume. This VRS-RTK Surveying system is proved to have more accurate three dimensional coordinates with high density and better economical solution with less manpower.

Evaluation for Applying Low-Cost Mobile Laser System to Earth Volume Calculation at Construction Site (건설현장에서의 토공량산출을 위한 저가형 모바일 레이저시스템의 적용성 평가)

  • Kim, In Seop
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.30 no.6_1
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    • pp.539-547
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    • 2012
  • Volume survey for earthwork is conducted periodically at every month at large scaled construction sites for request payment for the construction. Currently, the earthwork volume is calculated on the overlapped drawing for two cross sections which were created by new and previous surveying data observed by GPS and TS. However the survey is required lots of time and expenses as it is a pin-point surveying method thus surveyors intend to get data only for the heavy undulated topographic features chosen by himself to save time and expenses. Consequently, it causes poor results due to low dense measurement as well as it's not matched with the results by another surveyors. As a result, the conflicts related in earthwork volume calculation often arises among the owner, contractors and sub contractors. In this study, we developed a method to get surveying data for fast and accurate volume calculation using 3D Mobile Laser System and conducted an application test. Also we carried out experiments for topographic survey using MLS to judge for the application additionally. The results showed that we could reduce a time for cross section survey from 48 hours to 2 hours and collected high dense data which have 0.2m interval instead of 3m interval compare with existing method. Also we could make a map which has high accuracy within 10cm in horizontal through topographic survey using MLS.

System Improvement for Application and Diffusion of Earthwork Surveying Automation Technology (토공측량 자동화 기술의 적용 활성화를 위한 제도개선 방안)

  • Lee, Du-Heon;Park, Jae-Woo
    • The Journal of the Korea Contents Association
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    • v.18 no.6
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    • pp.303-313
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    • 2018
  • The purpose of this study is digitalization of earthwork such as development of 3D terrain analysis platform using latest technologies including unmanned aerial vehicle and terrestrial laser scanner to ultimately achieve earthwork automation. It is necessary to develop related element technologies and to establish regulations so that it can be applied to the domestic construction projects. As a result of pilot project about the earthwork surveying automation technology, it was confirmed that information such as terrain coordinates, soil, boring, and excavation volume is acquired smoothly. In this paper, we investigate related regulations and manuals in Japan and propose the improvement plan of domestic regulation. We plan to study regulations from early to final construction stage, combine with the 'regulation for public surveying', and improve the regulations in detail.

Development and Evaluation of High-precision Earth-work Calculating System using Drone Survey (드론을 활용한 고정밀 토공량 산출 시스템 개발 및 평가)

  • Kim, Sewon;Kim, YoungSeok
    • Journal of the Korean Geosynthetics Society
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    • v.18 no.4
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    • pp.87-95
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    • 2019
  • Earth-work calculation is the important data for estimating the optimal construction cost at the construction site. Earth-work calculations require the accurate terrain data and precise soil volume calculations. Drone surveying technology provides accurate topography in a short time and economic advantages. In this paper, a drone surveying technique was used to derive a high precision soil volume calculation system. Field demonstration were performed to verify the accuracy of the volume measurement system. The results of earth-work calculation using drone survey were compared with those of GPS surveying. In addition, the developed earth-work volume calculation algorithm is compared with the existing aerial survey software (Pix4D) to verify the accuracy.

A Study on the Earthwork Calculation Using Photogrammetry (사진측량을 이용한 토공량 결정에 관한 연구)

  • 유복모;유용택;이변직
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.8 no.1
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    • pp.41-50
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    • 1990
  • The purpose of this thesis lies in proving the practicality of photogrammetry and in promoting photogrammetry in earthwork which plays a major role in civil engineering projects. Analysis of accuracy in the determination of ammount of earthework was done by applying interpolation methods in digital terrain model. As a result of analysis of the data acquisition method, in cross-section method produced acceptable accuracy from Simpson's three-eighths rule and prismoidal rule. In results DTM, we have obtained the fact that earthwork calculation accuracy was increased by applying two or more interpolation methods. Therefore, the method by digital terrain model using aerial photograph has proved to be more efficient.

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On Estimating Pit-Excavation Volume using Spline Surfaces without Boundary Conditions (경계조건이 없는 스플라인 곡면을 이용한 토공량 결정에 관한 연구)

  • Yoo, Jae-Chil;Mun, Du-Yeoul
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.28 no.1
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    • pp.5-12
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    • 2010
  • It is very important to get the accurate calculation of pit-excavation volume in many civil engineering projects. There have been common drawbacks to earlier methods of ground profiling, such dealing with sharp corners or the grid points any two straight lines. There are several papers of using spline surfaces to obtain more accurate calculations of the earthwork. In this paper, we propose an algorithm of finding a spline surface without boundary conditions which interpolates the given data and an appropriate method to calculate the earthwork. We present some computational results showing that our proposed method provides good accuracy.

A study on the comparison of accuracy of evaluation method of earthwork volume using on DTM (DTM에서 토공량의 산정방식에 따른 토공량의 정확도 비교)

  • 문일석;전재홍;조규전
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.13 no.2
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    • pp.277-283
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    • 1995
  • In the study, an accuracy of earthwork volume is evaluated according to different methods of the calculation with different criteria. The criteria applied to this study are a interpolation method, a grid intavals and the method of earthwork evaluation. A numerical test has performed on two different terrain models with four different methods of calculation in the earthwork volume and two different grid intervals. The end area method, prismoidal formular, Simpson's formular, and middle area method are applied to the calculation of the earthwork volume. As a result of this study, it is showed that the moving average method with the first order term gives the most accurate result in interpolation, and that also the prismoidal formular and Simpson's formular gives more accurate result than average and area method and middle area method in the calculation of earthwork volume.

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A Estimation of Soil Conversion Factor Using Digital Photogrammetry and 3D Laser Scanner (디지털사진측량 및 3D 레이저스캐너를 이용한 토랑환산계수의 산정)

  • Lee Jae-Kee;Jung Sung-Heuk;Lee Kye-Dong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.24 no.2
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    • pp.227-234
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    • 2006
  • Ministry of construction & transportation is operating for the soil and rock information system and is considered to accurate application of soil conversion factor that is essentially necessary for accurate calculation of earth volume. Since the balance of cutting earth in public work, the plan of spoil bank or borrow pit are directly related to construction costs, accurate calculation of earth volume and efficient scheme of haul are important. As such, this study has provided methods that can acquire information that is more rapid, applicable to job sites, and trustworthy by comparing resultant values of photogrammetry, laser scanning, or inside job site experimentations, and calculated soil conversion factor by applying photogrammetry and laser scanning methods for hard rock that has difficulty in calculating soil conversion factor. The study can provide alternatives that can resolve the problems of unbalanced earth volume that may arise in applying to plans the earth conversion factor that relies on planning books and experience without considering the characteristics of job site earth, and can establish its relevancy by calculating soil conversion factor for hard rock that has relative difficulties in doing inside or job site testing.

Earthwork Volume Computation by Digital Terrain Model (Digital Terrain Model을 이용(利用)한 토공량산정(土工量算定))

  • Lee, Suk Chan;Shin, Bong Hoo;Lee, Jae Hyo
    • Journal of The Korean Society of Civil Engineers
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    • v.5 no.1
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    • pp.83-90
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    • 1985
  • According to development of the areial photogrammetry, it is uneconomical to acquire the terrain information and compute the earthwork volume of each building site by a field surveying which is used recently because it is acquired much money and time. The aim in the this thesis is to acquire the terrain information using the Digital Terrain Model (DTM) to gain in the aerial photograph and compute the rapid and economical earthwork carrying out digital test. Because of being little difference between the digital test and field (site) surveying in the earthwork volume, that result is fitter in preliminary planning than in practical planning to the extent.

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A Study on the Earth-Volume Determination in Road Design by D.T.M. (수치지형 모델을 이용한 도로의 토공양산정에 관한 연구)

  • 조영호
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.7 no.2
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    • pp.7-19
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    • 1989
  • The developments in remote-sensing, digital mapping, and automation of land information system have provided the impetus for the increasing use of Digital Terrain Models in engineering planing and design. In this paper, an evaluation is made on tile method of accurate earth-volume determination in computerized road design using by Digital Terrain Models. The result of numerical test shows that the $BL_{in}$-1 Model is the most efficient model in Earth-volume determination of road design.

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