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A Numerical study on the Moisture Transport of Concrete Tunnel Linings with the Sprayable Waterproofing Membrane

뿜칠 방수 멤브레인이 시공된 터널 라이닝의 수분이동에 관한 수치해석 연구

  • Received : 2016.06.17
  • Accepted : 2016.06.24
  • Published : 2016.06.30

Abstract

The sprayable waterproofing membrane is installed between shotcrete to provide crack bridging and hence prevent flow of liquid water as a waterproofing system. Because of its material characteristics, the sprayable membrane can be constructed at more complex structure than sheet membrane. The main component of the sprayable waterproofing membrane is a polymer-based material, therefore, moisture can migrate through sprayable waterproofing membrane materials by capillary and vapor diffusion mechanisms. The moisture transport mechanisms can have an influence on the degree of saturation and may influence the pore pressure and risk of freeze-thaw damage on concrete linings and membrane. In this study, long-term hygrothermal behavior was simulated with considering moisture transport and long-term effects on saturation of tunnel linings. From the simulation, due to water absorption and vapor transport properties of sprayable membrane, change of relative humidity and water content in tunnel lining can be evaluated.

Keywords

Sprayable waterproofing membrane;Tunnel;Waterproof;Moisture transport;Numerical analysis

References

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Acknowledgement

Grant : 지반함몰 발생 및 피해저감을 위한 지반 안정성 평가 및 굴착.보강 기술개발

Supported by : 국토교통과학기술진흥원