A Study on the Field Application of a Small Dynamic Cone Penetration Tester Using Hammer Automatic Strike and Penetration Measurement

Hwiyoung Chae; Soondal Kwon

doi:10.14481/jkges.2023.24.12.5

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2023 Vol.24, Issue 12 Next Page

A Study on the Field Application of a Small Dynamic Cone Penetration Tester Using Hammer Automatic Strike and Penetration Measurement 해머 타격과 관입량 측정이 자동화된 소형 동적콘관입시험기의 현장 적용성 연구

1 December 2023. pp. 5-11

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Abstract

Economic damage is occurring due to landslides and debris flows that occur when the ground artificially created for roads or photovoltaic power generation facilities is weakened by rainfall such as torrential rain. In order to understand the stability of the artificially created ground, it is very important to check the ground information such as the compositional state and mechanical characteristics of the stratum. However, since most of the investigation sites are steep slopes or there are no access roads, it is not easy to enter the drilling equipment commonly used to check ground information and perform standard penetration tests. In this study, a dynamic cone penetration test (DCP) device using a miniaturized auger drilling equipment and an automatic drop device was developed to check the cone resistance value and the dynamic cone penetration test value and analyze the correlation with the standard penetration test value to confirm its applicability at the mountain solar power generation site. As a result, the cone resistance value is q_d = 0.46 N and the dynamic cone penetration test value is N_d = 1.58 N, confirming a value similar to the results of existing researchers to secure its reliability.

Keywords

Small auger drilling rig

Cone resistance

Dynamic cone penetration

Standard penetration test

Correlation analysis

도로나 태양광 발전시설의 인위적으로 조성된 지반이 집중호우와 같은 강우에 의해서 약화되면서 발생되는 산사태, 토석류 등에 의해 경제적 피해가 발생하고 있다. 인위적으로 조성된 지반의 안정성을 파악하기 위해서 지층의 구성상태, 역학적 특성 등의 지반정보 확인이 매우 중요하다. 하지만 조사부지가 대부분 급경사로 이루어지거나 진입로가 대부분 없기 때문에 지반정보를 확인하기 위해 일반적으로 사용되고 있는 시추장비와 표준관입시험의 수행이 쉽지 않다. 본 연구에서는 소형화한 오거시추 장비와 자동낙하장치를 적용한 동적콘관입시험(Dinamic Cone Penetrometer, DCP) 장비를 개발하여 산지태양광 부지에서의 적용성을 확인하기 위하여 콘저항값 및 동적콘관입시험값과 표준관입시험값의 상관관계를 분석하였다. 그 결과 콘저항값은 q_c = 0.46 N, 동적콘관입시험값(N_d)는 N_d = 1.58 N으로 기존연구자들의 결과와 유사한 값을 확인하여 그 신뢰성을 확보하였다.

키워드

소형 오거시추기

콘저항

동적콘관입시험

표준관입시험

상관관계

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Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 24
No :12
Pages :5-11
Received Date : 2023-09-04
Revised Date : 2023-09-06
Accepted Date : 2023-10-30
DOI :https://doi.org/10.14481/jkges.2023.24.12.5

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

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