Electronic Theses and Dissertation

Pembangunan jalan tol sigli – banda aceh merupakan salah satu proyek infrastruktur penting yang sedang dikerjakan di wilayah aceh. pelaksanaan pekerjaan cut and fill melibatkan perubahan kontur lahan asli untuk menciptakan tinggi permukaan sesuai desain konstruksi jalan tol. sta 12+400 mengakibatkan kelongsoran di beberapa tempat. terjadinya longsor karena di bawah lapisan tanah dasar (subgrade) adanya lapisan lunak yang mempunyai daya dukung rendah. stabilisasi tanah menggunakan bahan tambah (additive) yaitu kapur, yang mempunyai tujuan untuk merubah sifat-sifat tanahnya, mengurangi kelunakan tanah dan juga meningkatkan daya dukung tanahnya. pada penelitian ini menggunakan campuran kapur dengan persentase 3%, 6%, 9%, dan 12%. untuk mengetahui daya dukung tanah clay shale maka dilakukan pengujian california bearing ratio (cbr) tanpa rendaman (unsoaked) bertujuan untuk mengetahui daya dukung tanah/tanah dasar (subgrade) dalam kondisi kering/tidak terendam dalam pembangunan konstruksi. pengujian yang dilakukan ialah pengujian sifat-sifat fisis dan sifat-sifat mekanis dengan campuran persentase kapur. pengujian sifat-sifat fisis terdiri diri pengujian kadar air, analisis saringan, berat jenis dan batas atterberg. pada pengujian sifat mekanis terdiri dari pengujian pemadatan dan cbr. dari pengujian cbr diperoleh hasil tanah asli 2,67%, pada 3% kapur memperoleh hasil 3,07%, pada 6% kapur memperoleh hasil 3,34%, pada 9% kapur memperoleh hasil 3,66% dan 12% kapur memperoleh hasil 4,14%. cbr

The construction of the Sigli – Banda Aceh Toll Road is one of the important infrastructure projects currently being carried out in the Aceh region. Carrying out cut and fill work involves changing the contour of the original land to create surface height according to the toll road construction design. STA 12+400 resulted in landslides in several places. Landslides occur because, beneath the subgrade layer, there is a soft layer that has a low bearing capacity. Soil stabilization uses an additive, namely lime, which aims to change the properties of the soil, reduce the softness of the soil, and increase the soil's bearing capacity. In this study, a lime mixture with percentages of 3%, 6%, 9% and 12% was used. To determine the bearing capacity of clay shale soil, the California Bearing Ratio (CBR) test was carried out without immersion (unsoaked) to determine the bearing capacity of the soil/subgrade (subgrade) in dry condition or unsoaked conditions during construction. The test carried out was testing the physical properties and mechanical properties with a mixture of lime percentages. Testing of physical properties consists of testing water content, sieve analysis, specific gravity, and Atterberg limits. Mechanical properties testing consists of compaction and CBR testing. From the CBR test, the original soil yield was 2.67%, at 3% of lime the yield was 3.07%, at 6% of lime the yield was 3.34%, at 9% of lime the yield was 3.66% and at 12% of lime the yield was 4.14%. CBR