All Issue

2021 Vol.31, Issue 3 Preview Page

Research Article

Inspection Method Validation of Grouting Effect on an Agricultural Reservoir Dam

농업용 저수지 제체에서의 그라우팅 주입효과 확인방법의 검증

Hyeong-Sin Kim1
,
Seong-Woo Moon2
,
Kookmook Leem3
,
Yong-Seok Seo4*
김 형신1
,
문 성우2
,
임 국묵3
,
서 용석4*
1Ph.D. Student, Department of Disaster Prevention Engineering, Chungbuk National University
2Post-Doctor, Department of Earth and Environmental Sciences, Chungbuk National University
3CEO, Hanse GeoEngineering Co., Ltd.
4Professor, Department of Earth and Environmental Sciences, Chungbuk National University
1충북대학교 방재공학 학과간협동과정 박사과정
2충북대학교 지구환경과학과 박사 후 연구원
3(주)한세지반엔지니어링 대표이사
4충북대학교 지구환경과학과 교수
*Corresponding Author
30 September 2021. pp. 381-393
PDF XML Citation
Abstract

Physical, mechanical, hydraulic, and geophysical tests were applied to validate methods of inspecting the effectiveness of grouting on an agricultural reservoir dam. Data obtained from series of in situ and laboratory tests considered four stages: before grouting; during grouting; immediately after grouting; and after aging the grouting for 28 days. The results of SPT and triaxial tests, including the unit weight, compressive strength, friction angle, cohesion, and N-value, indicated the extent of ground improvement with respect to grout injection. However, they sometimes contained errors caused by ground heterogeneity. Hydraulic conductivity obtained from in situ variable head permeability testing is most suitable for identifying the effectiveness of grouting because the impermeability of the ground increased immediately after grouting. Electric resistivity surveying is useful for finding a saturated zone and a seepage pathway, and multichannel analysis of surface waves (MASW) is suitable for analyzing the effectiveness of grouting, as elastic velocity increases distinctly after grouting injection. MASW also allows calculation from the P- and S- wave velocities of dynamic properties (e.g., dynamic elastic modulus and dynamic Poisson’s ratio), which can be used in the seismic design of dam structures.

Keywords
agricultural reservoir dam
grouting effect
physical and mechanical methods
in-situ permeability test
electrical resistivity survey
MASW

농업용 저수지 제체에 대한 그라우팅 주입효과 확인방법을 검증하기 위하여 물리 ‧ 역학적 방법, 수리학적 방법, 지구물리학적 방법을 적용하여 결과를 분석하였다. 실내시험과 현장시험을 통하여 획득한 데이터들은 그라우팅 주입단계에 따라 ① 그라우팅 이전, ② 그라우팅 중 ③ 그라우팅 직후, ④ 그라우트재 재령 28일 이후로 구분하여 획득되었다. 시추과정에서 획득되는 단위중량, 압축강도, 마찰각, 점착력, N값(관입저항치)의 경우 지반 개량을 확인할 수는 있지만, 지반의 불균질성에 기인하는 한계도 나타났다. 현장 투수시험으로 측정된 투수계수는 그라우트재가 고결되기 이전에도 차수성이 확인되어 그라우팅 직후에 저수지 제체의 개량효과를 확인하기에 가장 적합한 것으로 나타났다. 전기비저항탐사는 그라우팅 이전 저수지 제체에 발달하는 포화대와 누수영역 파악 활용에 적합하였다. 표면파탐사(MASW)는 그라우팅 주입 이후에 탄성파속도가 점차적으로 증가하는 경향성이 뚜렷하여 개량효과를 판단하는데 효과적인 것으로 판단되며, 탄성파 속도를 이용하여 동적특성을 산정할 수 있으므로 내진설계의 기초자료로 활용될 수 있을 것으로 기대된다.

키워드
농업용 저수지
그라우팅 주입효과
물리 ‧ 역학적 방법
현장 투수시험
전기비저항탐사
표면파탐사
References
1
Bae, H.S., Lee, Y.D., Won, K.S., 2018, A validation study on the reinforcement effect of reservoir grouting by surface wave survey, The Journal of Engineering Geology, 28(2), 297-312 (in Korean with English abstract).
2
Byle, M.J., Borden, R.H., 1995, Verification of geotechnical grouting, American Society of Civil Engineers, 175p.
3
Chungbuk Aqua Exploitation, 2018, Boring investigation report of facilities rehabilitation and upgrading for ○○ Reservoir irrigation, Chungbuk Aqua Exploitation, 67p (in Korean).
4
Geotech Technology Institute, 2012, Chemical feeding method, Ilkwang, 208p (in Korean).
5
Hoek, E., Brown, E.T., 1997, Practical estimates of rock mass strength, International Journal of Rock Mechanics and Mining Sciences, 34(8), 1165-1186. 10.1016/S1365-1609(97)80069-X
6
KRC (Korea Rural Community Corporation), 2020, Rural agricultural water resource information system, Retrieved from http://rims.ekr.or.kr/awminfo/storagerate05.do.
7
KS F 2306, 2020, Standard test method for water content of soils, Korean Agency for Technology and Standards, 6p (in Korean).
8
KS F 2307, 2017, Standard test method for standard penetration test, Korean Agency for Technology and Standards, 9p (in Korean).
9
KS F 2322, 2020, Standard test methods for permeability of saturated soils, Korean Agency for Technology and Standards, 9p (in Korean).
10
KS F 2346, 2017, Standard test method for unconsolidated undrained strength of cohesive soils in triaxial compression test, Korean Agency for Technology and Standards, 7p (in Korean).
11
Lee, H.W., Chang, P.W., 2007, Correlation between the laboratory and in-situ permeabilities for the embankments, KSCE Journal of Civil Engineering, 11(1), 1-5. 10.1007/BF02823366
12
MAFRA (Ministry of Agriculture, Food and Rural), 2017, Agricultural production infrastructure improvement project schematic design for foundation treatment (Grouting), 165p (in Korean)
13
Oh, S.H., Sun, C.G., 2004, Analysis of geophysical and geotechnical SPT data for the safety evaluation of fill dam, Journal of the Korean Geophysical Society, 7(3), 171-183 (in Korean with English abstract).
14
Park, S.G., Song, S.H., Choi, B.G., Lee., B.H., 2002, Applicability of geophysical prospecting for water leakage detection in water utilization facilities, Korean Society of Earth and Exploration Geophysicists Special Symposium Series 4, 179-195 (in Korean with English abstract).
15
Vallejo, L.G., Ferrer, M., 2011, Geological engineering, Taylor and Francis, London, 679p.
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 31
  • No :3
  • Pages :381-393
  • Received Date : 2021-08-25
  • Revised Date : 2021-09-12
  • Accepted Date : 2021-09-14
  • DOI :https://doi.org/10.9720/kseg.2021.3.381
Journal Informaiton The Journal of Engineering Geology The Journal of Engineering Geology
Online Submission
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close