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A study on the normal project duration development for the construction of multi-utility tunnel in the existing city

기존시가지의 공동구 건설을 위한 표준공기 산정에 대한 연구

  • Lee, Seong-Won (Department of Infrastructure Safety Research, Korea Institute of Civil engineering and building Technology) ;
  • Lee, Pil-Yoon (R&D Division, Unicons Co. Ktd) ;
  • Byun, Yo-Seph (Department of Infrastructure Safety Research, Korea Institute of Civil engineering and building Technology) ;
  • Cho, Choong-Yeun (R&D Division, Unicons Co. Ktd) ;
  • Lee, Min-jae (Department of Civil Engineering, Chungnam National University)
  • Received : 2018.10.11
  • Accepted : 2018.12.07
  • Published : 2018.12.31

Abstract

In construction, schedule management is the basic but important step, for the effective schedule management, the preparation of the reasonable schedule table should be prioritized. In the design stage, the optimal construction period can be selected through comparison of various conditions and construction methods considering weather conditions and site characteristics. But, At the planning phase, it is difficult to select the effective method and calculate the proper construction period by the basic data(D/B) analysis. In this paper, the construction method considering characteristics of each type and conditions of existing city was selected. For the reasonable duration calculation, we analyzed the unit schedule for RC method for open type and Shield TBM method for tunnel type. The normal project duration of construction assuming of 1,200m of extension and every 200m of ventilation was prepared by integrating each unit schedule. It was analyzed that it took 893 days for the open type and 616 days for the tunnel type. The results of this study will help to make type selection and normal project duration more easily in the planning phase. If it is linked to the design stage, it will be easy to estimate the process and construction cost.

건설공사에서 공정관리는 기본적으로 가장 중요한 단계이며, 효율적인 공정관리를 위해서는 합리적 공정표 작성이 우선시 되어야 한다. 설계단계에서는 기상조건과 현장 특성을 고려한 다양한 조건과 공법의 비교 검토를 통해 최적의 공사 기간을 산정할 수 있으나, 기획단계에서 기본적인 자료(D/B) 분석만으로는 효율적 공법 선정과 적정한 공사 기간 산정이 어렵다. 따라서, 기획단계에서 기존시가지의 공동구 건설시 표준공기 분석을 위하여, 본 논문에서는 공동구 형식을 개착식 및 터널식으로 구분하고, 각 형식의 특성과 기존시가지의 조건을 고려한 공법을 선정 하도록 하였다. 합리적인 공기 계산을 위하여 외부 공사에 영향을 주는 기상조건을 고려하여 년 간 가동율을 산정 하였으며, 개착식은 RC 공법/터널식은 Shield TBM 공법에 대한 단위공정을 분석하였다. 각 단위공정을 종합하여 연장 1,200m, 환기구 200m 간격으로 가정한 공사의 표준공기를 산정한바, 개착식은 893일, 터널식은 616일이 소요되는 것으로 분석 되었다. 본 연구의 결과는 기획단계에서 보다 쉽게 공동구 형식 선정과 표준공기 산정에 도움이 될 것이며, 추후 설계단계에 연계하면 공정 및 공사비 산정이 용이할 것으로 판단된다.

Keywords

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Fig. 1. Step Scope of Schedule Management

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Fig. 2. Structure construction flowchart

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Fig. 3. Unit schedule flow chart of PC Box

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Fig. 4. Unit schedule flow chart of Vent

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Fig. 5. Open multi-utility tunnel normal project duration(L = 1,200m, three working group)

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Fig. 6. Tunnel multi-utility tunnel normal project duration(L = 1,200m)

Table 1. Domestic multi-utility tunnel installation status(As of Dec. 2017)

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Table 2. Japan multi-utility tunnel installation status

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Table 3. Application Standard of Non-Working day

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Table 4. Non-Working day Calculation

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Table 5. Multiple calendars Application

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Table 6. Unit schedule flow chart of RC Box

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Table 7. Japan small Shield TBM application status

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Table 8. Unit schedule flow chart of slurry wall

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