Abstract
This research was conducted on the Surakarta-Gemolong-Geyer provincial road which is suspected to be built on expansive soil using the ATENA V5 3D software program. ATENA program can be used to simulate crack propagation in concrete and reinforced concrete structures. This study uses quantitative analysis methods, to the analysis of fracture patterns of rigid pavements with transverse reinforcement on expansive soils. Rigid pavement is modeled into 2 types, namely rigid transverse reinforced pavement models due to swelling pressure forces on expansive soils and transverse reinforced rigid pavements without swelling pressure forces on expansive soils. The swelling test on the soil carried out in the laboratory was 37 kPa. The rigid pavement model is subjected to load testing. The load used is the standard load of a medium-sized truck. The repetition of loading used is 30 times. The loading is divided into 3 types, namely: edge, center, and corner loading. The results of the analysis of rigid pavements were compared between rigid pavements due to swelling pressure forces on expansive soils with rigid pavements without swelling pressure forces. The results of the analysis from the ATENA software program show that every loading test on rigid pavement due to swelling pressure forces cracks greater than loading without swelling pressure forces. Edge loading shows that cracks due to swelling pressure are 3.5% higher than those without swelling pressure. Middle loading shows cracks due to swelling pressure which is 8.33% greater. Middle loading shows that cracks due to swelling pressure are 3.56% higher than without swelling pressure. This research can be used as a reference and prediction in identifying cracks that occur so that the government can carry out appropriate design planning and maintenance and rehabilitation of rigid pavements on expansive soils.
Highlights
Transportation is one of the means of supporting national development
The pattern of cracks that occur in rigid pavements with transverse reinforcement without swelling pressure force of middle loading is 38.10% (Cracks in 32 elements of 84 elements) and in rigid pavements with transverse reinforcement due to swelling pressure forces of middle loading of 41.67% (Cracks at 35 elements out of 84 elements)
These data indicate that the cracks produced by loading on rigid pavements due to swelling pressure forces are greater than the loading of rigid pavements without swelling pressure forces
Summary
Transportation is one of the means of supporting national development. Along with the increasing human needs in various sectors, the problems that exist are increasing, including transportation problems. Expansive soil has been recognized as a problem that can pose a threat to the stability of the earth's structure due to significant soil volumetric changes when subjected to moisture variations [3] This type of soil will usually expand in the rainy season and shrink back in the dry season. The crack pattern analysis will be used as concrete pavement damage caused by swelling pressure due to the different moisture content in expansive soil. In dry conditions (dry season), the water in the soil will experience evaporation (evaporation) so that the soil will shrink, especially in the layer near the surface This condition will cause cracks and cause damage to the pavement above it [8]. From the results of this research, the crack pattern analysis could be used as the awareness for concrete pavement design to include the swelling pressure in the calculation of thickness and reinforcement as well as to prevent preventive pavement damage so that the durable and sustainable concrete pavement could be achieved
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