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Analysis of the Cause of Waterleakage in Residential Apartment Underground Parking Ground and the Review of the Repare Methods

공동주택 지하주차장의 누수원인 분석 및 보수방안 검토

  • Oh, Sang-Keun (Architectural Engineering, Seoul National University of Science and Technology) ;
  • Choi, Sung-Min (Institute of Construction Technology, Seoul National University of Science and Technology) ;
  • Song, Je-Young (BK Institute of Waterproofing & Anticorrosion Tech Corp.)
  • 오상근 (서울과학기술대학교 건축학부) ;
  • 최성민 (서울과학기술대학교 건설기술연구소) ;
  • 송제영 (BK방수방식연구소)
  • Received : 2014.09.19
  • Accepted : 2014.09.22
  • Published : 2014.09.30

Abstract

This study analyzes the cause and the repairing method of water leak by parts of basement parking lot which is recorded to have a high defect frequency in apartment buildings. It has been assessed that the cause of water leakage on the first floor upper substrate is due to such factors as landscaping and weights. During construction or through other cases, it has been determined that cracks were produced in the apartment structure because the structure was weak and exposed to the effects of the substrate movement. The base floor and underground external walls are areas that are exposed to water pressure (uplife pressure), thus in normal cases the rear surface repair of the structure using sythetic rubberized polymer gel should be considered as an effective method. However, in cases where application of waterproofing layer is required in the structure due to high water pressure, using asystolic cement milk grout to form the waterproofing layer and applying water-swelling acrylic material into the cracked areas is considered to be highly effective.

본 연구에서는 공동주택의 주요 하자발생 부위인 지하주차장을 대상으로 부위별 누수원인과 보수방안에 대하여 검토하였다. 지하 1층 상부 슬래브의 누수 원인은 슬래브 상부에 조경과 같은 중량물이 설치되고, 공사 중 혹은 기타 요인에 의한 구조물 거동 시 바탕면에 균열이 발생됨에 따라 방수층이 이에 대응하지 못하고 파단되어 누수가 발생된 것으로 판단된다. 보수로는 합성고무계 폴리머 겔을 사용한 방수층 재형성 공법이 안정적이라 판단된다. 층간 슬래브의 경우 수팽창성 아크릴주입재를 사용하여 보수하며, 그 밖에 차량 진출입구는 시트+겔을 복합화한 복합방수와 폴리우레아 시공이 안정적이라 판단된다. 기초바닥과 지하외벽은 지하수의 수압(양압력)이 가해지는 부위로써 일반적으로 합성고무계 폴리머겔을 이용한 배면보수가 효과적이지만 수압이 높아 차수층 형성이 요구되는 시공구간에 대해서는 무수축 시멘트 밀크 그라우트재로 차수막을 형성시킨 후 구조체의 균열부에 수팽창성 아크릴재로 주입보수하는 것이 효과적이라 판단된다.

Keywords

Acknowledgement

Grant : 주거 복지 구현을 위한 생활밀착형 공동주택 성능 향상 기술개발

References

  1. Choi, S.-M.,, Oh, S.-K., and Seo, C.-H. (2012). Construction of an evaluation system for selecting an appropriate waterproofing method for the roof of a building, Can. J. Civ. Eng. 39, 1264-1273. https://doi.org/10.1139/l2012-070
  2. Kang Y.-M., Park J.-M., Choi J.-H., Kim O.-K., and Seo D.-S. (2011). A Study on the Issue about the Water leak and Condensation Defect of Lawsuit on Defect in Apartment Building, Proceeding of The Architectural Institute of Korea, 31(2), 443-444.
  3. Mailvaganam, N. and Collins, P. (2004). Workmanship Factors Influencing Quality of Installed Parking Garage Waterproofing Membranes, J. Perform. Constr. Facil., 18(3), 121-126. https://doi.org/10.1061/(ASCE)0887-3828(2004)18:3(121)

Cited by

  1. Leakage Situation and Main Leakage Areas of Domestic Residential Building Underground Parking Lots vol.4, pp.4, 2016, https://doi.org/10.14190/JRCR.2016.4.4.496