Soil Compaction Methods Development

Abstract

A process of soil compaction methods development including new authors’ methodology is described. The importance of soil compaction for engineering purposes is substantiated. Preconditions for Proctor compaction test appearance are highlighted. Proctor’s approach and suggestions for the degree of soil compaction assessing are analyzed. Soviet version of Proctor’s equipment and Modified Proctor compaction test are given. Principal differences between Proctor test, Standard compaction test and Modified Proctor test are presented. The problems and disadvantages of existent soil compaction tests are revealed. New authors’ physical experiment methodology for patterns establishment of water migration in subgrade embankment depth, in the capacity factors of what it is accepted: clay soil type (its number plasticity); moisture, at what the soil was compacted; soil skeleton density; embankment height; «rest» time after subgrade erection and before it’s operation is developed and realized. By laboratory and field tests water migration patterns in compacted subgrade soils depth are established. As a result of statistical processing of research results, the empirical dependence of compacted clay soil stabilized moisture is obtained. Empirical dependence parameter corresponds to maximum molecular moisture capacity at what it is advisable to do the subgrade clay soils multilayer consolidation for their long-term strength ensuring.

Evaluasi Kepadatan Tanah Timbunan dengan Sand Cone

“…Jika kepadatan tanah tidak memenuhi persyaratan yang ada, maka akan terjadi kerusakan pada tanah itu sendiri dan dalam jangka waktu panjang akan dapat merusak struktur perkerasan di atas tanah tersebut [8]. Kepadatan tanah diperoleh dari proses pemadatan tanah, yaitu usaha mekanik yang dilakukan untuk memperbaiki sifat mekanis tanah dengan memaksimalkan kepadatan kering tanah [9]- [11] dan agar butiran tanah merapat sehingga volume tanah akan berkurang seiring dengan berkurangnya volume pori tanah, namun volume butiran tidak berubah [12], [13]. Cara yang dilakukan untuk mengetahui kepadatan suatu tanah adalah dengan membandingkan nilai berat volume kering tanah lapangan dengan nilai berat volume kering tanah laboratorium.…”