ANALISIS KERUSAKAN STRUKTUR PERKERASAN JALAN DI ATAS TANAH EKSPANSIF (Studi Kasus: Jalan Purwodadi - Geyer)

• Main Authors: , FAIZUL CHASANAH, , Dr. Ir. Hary Christady Hardiyatmo, M.Eng, DEA.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/120605/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=60643
• Institution: Universitas Gadjah Mada

Road damage which continues to occur on the road from Purwodadi to Geyer has not found the right treatment. The cause of the damage was allegedly caused by expansive soil conditions. Sub grade has an important role to the pavement structure on it. This research was conducted to evaluate the damage to the flexible pavement from km 66 +650 to km 87 +180, to analyze the influence of expansive pressure and potential of sub grade soil and to analyze pavement thickness of flexible pavement and rigid pavement that has been done by the government in 2012. The analysis done with evaluate of the road damage was based on secondary data from Dinas Bina Marga Purwodadi and the direct survey results on the field. The early research with put sample and then experiment it in laboratory and the soil classification was determined using the Unified system and AASHTO. The analysis of the potential expansive soil in this study used measurement method (indirect method) by Seed (1962) and the classification method (indirect method) by Chen (1975) while to analysis the pavement thickness was designed using the AASHTO (1993) and Bina Marga. The result of research show the existing condition have ten locations with severely damaged and one location with moderately damaged before the. The other roads with minor damage varied according to the types of damage such as surface texture deficiencies, potholes, edge defect, longitudinal cracking, block cracking and rutting. Based on the laboratory tests results, the soil condition has a critical expansive degree and high expansive pressure. These caused severe damage to the road. The analysis using AASTHO (1993) method generated additional pavement thickness of 25.5 cm which was required on flexible pavement while the analysis using Highways method produced the required pavement thickness of 23.5 cm on rigid pavement. Therefore, it can be concluded that the Purwodadi - Geyer road was not able to serve the traffic based on service life of ten years.