Influence of Pile Driving-Induced Vibration on the Adjacent Slope

Chang-Won Kwak

doi:10.7843/kgs.2023.39.5.27

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2023 Vol.39, Issue 5 Preview Page Next Page

Influence of Pile Driving-Induced Vibration on the Adjacent Slope 파일 항타진동이 인접 비탈면에 미치는 영향

31 May 2023. pp. 27-40

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Abstract

A pile is a structural element that is used to transfer external loads from superstructures and has been widely utilized in construction fields all over the world. The method of installing a pile into the ground should be selected based on geotechnical conditions, location, site status, environmental factors, and construction costs, among others. It can be divided into two types: direct hammering and preboring. The direct hammering method installs a pile into the bearing layer, such as rock, using a few types of hammer, generating a considerable amount of pile driving-induced vibration. The vibration from pile driving influences adjacent structures and the ground; therefore, quantitatively investigating the effects of vibration is inevitably required. In this study, two-dimensional dynamic numerical modeling and analysis are performed using the finite difference method to investigate the influence on the adjacent slope, including temporary supporting system. Time-dependent loading induced by pile driving is estimated and used in the numerical analysis. Consequently, large surface displacement is estimated due to surface waves and less wave deflection, and refraction at the surface. The total displacement decreases with the increase of the distance from the source. However, lateral displacement at the top of the slope shows a larger value than vertical displacement, and the overall displacement tends to be concentrated near the face of the slope.

Keywords

Dynamic numerical modeling

Finite difference method

Pile driving

Slope

Vibration

말뚝은 상부 구조물의 하중을 지지층으로 전달하는 구조체로 국내외 건설 현장에서 널리 사용되고 있다. 말뚝을 시공하는 방법은 지반조건, 시공위치, 주변현황, 환경적 요소, 공사비 등을 종합적으로 고려하여 결정하며 크게 직항타에 의한 타입방식과 선굴착 후 경타 또는 항타하는 방식으로 나눌 수 있다. 이 중 직항타는 말뚝 두부를 해머로 항타하여 원지반 내 소정의 심도까지 근입시키므로 항타 시 가해지는 에너지가 크고 이에 따른 항타진동 및 소음도 증가한다. 말뚝의 항타진동은 주변 시설물 및 지반에 영향을 미치므로 그 영향을 정량적으로 파악할 필요가 있다. 본 연구에서는 말뚝의 항타진동을 시간영역에서 산정하고, 직항타 시 말뚝과 인접하여 위치한 굴착면 및 가시설에 대하여 항타진동에 의한 영향을 유한차분해석법에 의한 2차원 동적수치해석을 통하여 분석하였다. 그 결과 파의 반사 및 재료감쇠가 적은 지표면에서 표면파에 의하여 지중보다 변위가 현저히 크게 발생하는 경향을 나타내었고 전체 변위 크기는 이격거리 증가에 따라 감소하나 수평방향 변위는 진동원과 먼 사면 상단부에서 연직방향 대비 더 큰 값을 보이며 법면부에 변위가 집중적으로 발생하는 특징을 확인하였다.

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 39
No :5
Pages :27-40
Received Date : 2023-03-21
Revised Date : 2023-03-30
Accepted Date : 2023-03-30
DOI :https://doi.org/10.7843/kgs.2023.39.5.27

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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