• 한국도로학회논문집
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• 제16권1호
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• pp.11-19
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• 2014

PURPOSES : The purpose of this article is to investigate the predicted life of jointed concrete pavement (JCP) with two variables effecting on axle load spectra (ALS). The first variable is different data acquisition methods whether using high-speed weigh-in-motion (HS-WIM) or not and the other one is spectra distribution due to overweight enforcement on main-lane of expressway using HS-WIM. METHODS : Three sets of ALS had been collected i) ALS provided by Korea Pavement Research Program (KPRP), which had been obtained without using HS-WIM ii) ALS collected by HS-WIM before the enforcement at Kimcheon and Seonsan site iii) ALS collected after the enforcement at the same sites. And all ALS had been classified into twelve vehicle classes and four axle types to compare each other. Among the vehicle classes, class 6, 7, 10 and 12 were selected as the major target for comparing each ALS because these were considered as the primary trucks with a high rate of overweight loading. In order to analyze the performance of JCP based on pavement life, fatigue crack and International Roughness Index (IRI) were predicted using road pavement design program developed by KPRP and each ALS with same annual average daily traffic (AADT) was applied to design slab thickness. RESULTS : Comparison ALS of KPRP with those of HS-WIM shows that the ALS of KPRP has a low percentage of heavy spectra such as 6~9 tonnes for single axle, 18~21 tonnes for tandem axle and 27~30 tonnes for tridem axle than other two ALS of HS-WIM in most vehicle classes and axle types. It means that ALS of KPRP was underestimated. And after the enforcement, percentage of heavy spectra close to 10 tonnes per an axle are lowered than before the enforcement by the effect of overweight enforcement because the spectra are related to overweight regulation. Prediction results of pavement life for each ALS present that the ALS of HS-WIM collected before the enforcement makes the pavement life short more than others. On the other hand, the ALS of KPRP causes the longest life under same thickness of slab. Thus, it is possible that actual performance life of JCP under the traffic like ALS of HS-WIM could be short than predicted life if the pavement was designed based on ALS provided by KPRP. CONCLUSIONS : It is necessary to choose more reliable and practical ALS when designing JCP because ALS can be fairly affected by acquisition methods. In addition, it is important to extend performance life of the pavement in service by controlling traffic load such as overweight enforcement.

• 대한토목학회논문집
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• 제32권6D호
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• pp.549-556
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• 2012

장대터널은 터널연장이 1km 이상인 터널로 정의한다. 우리나라의 지형적 조건과 안전한 선형설계를 위한 방편으로 터널구간이 불가피하게 많이 건설되고 있는 실정이다. 고속도로에 건설된 장대터널은 2010년 말 104개소, 총 연장 192km로 터널의 수요증가와 더불어 터널구간 또한 장대화 되고 있어 장대터널에 대한 안전성 평가가 이루어져야 할 것으로 판단된다. 이에 본 연구에서는 장대터널을 구성하고 있는 설계요소, 교통환경, 시선유도시설 등의 요인을 선정하여 교통사고 영향요인을 도출하고자 한다. 이를 위해 교통사고가 발생한 터널과 발생하지 않은 터널로 구분하여 통계적으로 유의한 설명변수를 선정하였다. 통계적으로 유의한 설명변수를 이용하여 교통사고에 더 직접적으로 영향을 미치는 요인을 파악하기 위해 로짓모형을 구축하였다. 분석결과, 운전자의 시인성 관련 요인인 주행차로 및 추월차로의 공동구 내장재 시설과 터널의 공간 확보를 위한 측방여유폭, 차로당 연평균일교통량 요인이 교통사고와 관련이 있는 것으로 분석되었다. 이러한 연구결과는 향후 장대터널 내 교통사고 예방대책을 수립하는 분석지표로 활용이 가능할 것으로 판단된다.