Temperature and settlement characteristics of graded crushed-rock layer for runway engineering in permafrost regions

Abstract

To maintain the temperature and settlement stability of a subgrade, a combination of graded crushed rock layer and insulation layer may be applied to optimize pavement structures. This study verifies a proposed numerical model of pavement and subgrade design in permafrost regions and evaluates temperature and settlement characteristics at different particle size and thickness of graded crushed rock layer and different thickness and location of insulation layer. The results show that the temperature and settlement of the combination of graded crushed-rock layer and insulation layer decrease significantly as the particle diameter and thickness of graded crushed-rock layer increase, and vary little when the thickness of insulation layer is more than 0.15 m. The location of installation layer has significant influence on the temperature of the subbase layer, but has little influence on the temperature of the subgrade. The maximum settlement of the pavement structure and subgrade decreases when the installation layer varies from the top of the subbase layer to the bottom of the subbase layer. The optimal combination of graded crushed-rock layer and insulation layer is that the 0.15 m-thickness installation layer is at the bottom of the 0.50 m-thickness graded crushed-rock layer with the particle size of 6–8 cm. This study provides a theoretical basis for the design, construction, operation, maintenance, and safety management of airport runways in permafrost regions.

Evaluasi Kekesatan Runway 06/24 Menggunakan Alat Skiddometer di Bandar Udara Internasional Soekarno-Hatta Dalam Upaya Peningkatan Pembelajaran Pemeliharaan Prasarana Sisi Udara Bandar Udara

“…Dalam pembahasan kali ini, pengujiannya dilakukan dengan menggunakan alat uji skiddometer yang mana pengujian kekesatan dilakukan dengan cara menderek (towing) alat skiddometer dengan mobil pada kecepatan tetap dengan disemprot air dalam keadaan basah, hal itu menstimulasikan kondisi runway sedang licin-licinnya (hujan) (Čelko and Kováč 2004). Alatnya terdiri dari satu roda penguji yang dapat berputar (Liu, Fu, and Li 2022). Alat ini merekam untuk mencatat grafik kekesatan yang menerus dari seluruh panjang permukaan yang diuji, dan pada bagian tertentu didapat grafik yang bervariasi (Asi 2007).…”