Evaluation of critical tractive forces of vegetation mats enhanced with biopolymer mixed soil

Du Han Lee; Myounghwan Kim

doi:10.3741/JKWRA.2020.53.3.167

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2020 Vol.53, Issue 3 Preview Page Next Page

Research Article

Evaluation of critical tractive forces of vegetation mats enhanced with biopolymer mixed soil 바이오폴리머 혼합토와 결합된 식생매트의 한계 소류력 평가

31 March 2020. pp. 167-179

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Abstract

Recently, new levee material has been developed to enhance natural soil strength and vegetation growth using biopolymer. In the study, critical tractive force of vegetated mats mixed with biopolymer mixed soil has been evaluated to apply the mixed soil to levee construction material. The mixed soil has been produced by mixing beta-glucan, clay, and sand. Full scale test bodies have been constructed with 3 cm thick of the mixed soil. Total 4 test bodies have been constructed and experimented. Critical tractive forces have been evaluated by observation and measurement of failure conditions and soil loss. Although performance of the vegetated revetments are affected by vegetation coverage conditions, the critical tractive forces are shown about 40 N/m² and the critical velocities are shown about 4 m/sec by full scale experiment. Erosion resistance is also enhanced by combination of root and net with mat materials.

Keywords

Biopolymer mixed soil

Levee material

Critical tractive force

Vegetated mats

Full scale hydraulic experiment

최근 바이오폴리머 소재를 이용하여 자연 흙의 강도와 식생의 생장을 증진하는 새로운 제방 소재가 개발되었다. 본 연구에서는 바이오폴리머 혼합토를 친환경 제방 재료로 활용하기 위해 혼합토로 조성된 식생 매트의 한계 소류력을 평가하였다. 혼합토는 베타글루칸을 주재료로 모래와 황토를 혼합하여 조성하였다. 실규모 시험체를 제작하여 혼합토를 3 cm 도포하였으며 식생과 매트를 이용하여 4개의 시험체를 제작하였다. 실규모 실험에 의해 손상과 토양유실을 관측하여 한계 소류력을 결정하였다. 식생 호안의 특성상 식생의 피복도에 따라 영향을 받기는 하지만 식생이 활착된 경우 개략적으로 한계소류력 42 N/m², 한계유속 4 m/sec을 실험을 통해 확인하였다. 또한 매트공법이 적용된 경우에는 뿌리와 매트의 결합으로 침식저항성이 강화됨을 확인하였다.

키워드

바이오폴리머 혼합토

제방 재료

한계 소류력

식생매트

실규모 수리 실험

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 53
No :3
Pages :167-179
Received Date : 2019-11-14
Revised Date : 2020-03-03
Accepted Date : 2020-03-03
DOI :https://doi.org/10.3741/JKWRA.2020.53.3.167

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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