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Road failures may be caused by many factors. In Batu Pahat district, open channel system is adopted and built on Batu Pahat Soft Soil and may be a crucial factor to probable damage of the rural roads structure. This study is focused on the drainage system for rural roads in Parit Raja, Batu Pahat. The type of damages is observed and the causes are identified. Recommendations on the best method are made to improve the effectiveness of current drainage system. Both site and laboratory geotechnical testing are carried out to analyze the causes of failure to the drainage system. Laboratory testing such as sieve analysis, moisture content, Atterberg limit, specific gravity and shear strength are conducted. While Mackintosh probes testing and vane shear test are conducted for site testing. From the analysis, four categories of drainage failure such as soil movement, edge drop, cracking and erosion due to the characteristics of soft clay that have low shear strength and high compatibility, have been determined. The propose methods to increase the effectiveness of the drainage system are to stabilize the soil using geotextiless, combination geotextiless and geocontainers, soil anchor and lime.

Site Investigation Of Road Drains For Rural Road On Batu Pahat Soft Clay (BPSC)