비굴착 지하배수암거 형태별 지하배수 성능 비교분석
Comparative Study on the Subsurface Drainage Discharge Performance by the Type of Non-Excavation Subsurface Drainage Culvert
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초록
In this study, subsurface discharge performance has been studied through theoretical seepage analysis on four types of culverts that can be installedunder the condition of non-excavation, such as ⓐperforated pipe(Φ50mm), ⓑperforated pipe+horizontal mat (B50cm) ⓒperforated pipe+horizontalmat+vertical gravel(B<10cm), ⓓperforated pipe+vertical gravel(B<10cm), and existing typical type ⓔperforated pipe with gravel (B40, h=40cm) whichcan be installed by excavation. The analysis results were as follows. i) Subsurface discharge performance per unit (m) was ⓐtype 56%, ⓑ 91%, ⓒ96%, ⓓ 76%, respectively, lower than the value of ⓔculvert. ii) However, considering that non-excavation culvert can be installed at a spacing of5m with the installation cost of the existing excavation culvert at the interval of 10m, it was analyzed that unit subsurface discharge(q) ofⓐ20.2mm/day(110%), ⓑ32.8(178%), ⓒ34.6(188%) ⓓ27.5(149%) in the four types of non-excavation culvert installed at intervals of 5m under thecondition of k=10-4cm/s was much larger than the amount of ⓔtype 18.5(100%), existing excavation culvert installed at 10m interval. iii) Through thetest construction, peak subsurface drainage discharge(qp) was 38.4mm/day, which is larger than the value of design criteria and confirmed that it satisfiesthe analysis results as well. iv) In particular, it was evaluated that ⓑperforated pipe+horizontal mat(B50cm) are low cost, high efficiency subsurfacedrainage culvert type with sufficient drainage performance(178%).
Abstract
In this study, subsurface discharge performance has been studied through theoretical seepage analysis on four types of culverts that can be installedunder the condition of non-excavation, such as ⓐperforated pipe(Φ50mm), ⓑperforated pipe+horizontal mat (B50cm) ⓒperforated pipe+horizontalmat+vertical gravel(B<10cm), ⓓperforated pipe+vertical gravel(B<10cm), and existing typical type ⓔperforated pipe with gravel (B40, h=40cm) whichcan be installed by excavation. The analysis results were as follows. i) Subsurface discharge performance per unit (m) was ⓐtype 56%, ⓑ 91%, ⓒ96%, ⓓ 76%, respectively, lower than the value of ⓔculvert. ii) However, considering that non-excavation culvert can be installed at a spacing of5m with the installation cost of the existing excavation culvert at the interval of 10m, it was analyzed that unit subsurface discharge(q) ofⓐ20.2mm/day(110%), ⓑ32.8(178%), ⓒ34.6(188%) ⓓ27.5(149%) in the four types of non-excavation culvert installed at intervals of 5m under thecondition of k=10-4cm/s was much larger than the amount of ⓔtype 18.5(100%), existing excavation culvert installed at 10m interval. iii) Through thetest construction, peak subsurface drainage discharge(qp) was 38.4mm/day, which is larger than the value of design criteria and confirmed that it satisfiesthe analysis results as well. iv) In particular, it was evaluated that ⓑperforated pipe+horizontal mat(B50cm) are low cost, high efficiency subsurfacedrainage culvert type with sufficient drainage performance(178%).
참고문헌 (8)
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