STABILITASI KUAT GESER TANAH LEMPUNG DENGAN KULIT UDANG DI KAWASAN TAMBAK DESA TAMBAK BERAS KECAMATAN CERME

STABILIZATION OF SHEAR STRENGTH OF CLAY SOIL WITH SHRIMP SHELLS IN THE TAMBAK AREA OF TAMBAK BERAS VILLAGE CERME DISTRICT

Desa Tambak Beras merupakan sebuah desa berada di kecamatan Cerme, kabupaten Gresik Jawa Timur. Saat ini di desa tambak beras masih banyak kegiatan konstruksi, terutama pembangunan gudang dan pabrik. Dengan kondisi tanah yang kurang cocok untuk konstruksi maka perlu dilakukan stabilisasi tanah diwilayah tersebut. Tambak udang yang banyak mendominasi wilayah tersebut, menjadi potensi sumber kehidupan masyarakat. Disisi lain juga menjadi sumber potensi limbah. Masalah yang terus dihadapi di kawasan tersebut ialah rendahnya kuat geser tanah yang terjadi. Metode ini memungkinkan menggunakan analisis kuantitatif yang diolah dengan pengelolaan statistik dan melakukan percobaan – percobaan pada sampel yang telah diambil. Nilai sudut geser (φ) dan kohesi (c) pada campuran 100 % tanah asli sebesar 7,366 kPa untuk kohesi (c) dan 7,139 derajat untuk sudut geser (φ). Pada campuran 100 % tanah asli + 5 % kulit udang didapat nilai kohesi (c) 9,952 kPa dan sudut geser (φ) 9,564 derajat. Pada campuran 100 % tanah asli + 10 % kulit udang didapat nilai kohesi (c) 11,223 kPa dan sudut geser (φ) 11,365 derajat. Pada campuran 100 % tanah asli + 15 % kulit udang didapat nilai kohesi (c) 8,920 kPa dan sudut geser (φ) 8,978 derajat.

Kata Kunci: Kawasan Tambak, Kuat Geser Tanah, Kulit Udang, Stabilitasi Tanah, Tanah Lempung

Tambak Beras Village is located in Cerme District, Gresik Regency, East Java. Currently, there is still a lot of construction activity in the rice pond village, especially the construction of warehouses and factories. With the land conditions that are less suitable for construction, soil stabilization is necessary in the area. Shrimp ponds that dominate the area, are a potential source of livelihood for the community. On the other hand, they are also a potential source of waste. A continuing problem faced in the area is the low shear strength of the soil that occurs. This method allows for quantitative analysis processed with statistical management and conducting experiments on samples that have been taken. The value of the friction angle (φ) and cohesion (c) in a mixture of 100% native soil is 7.366 kPa for cohesion (c) and 7.139 degrees for friction angle (φ). In a mixture of 100% native soil + 5% shrimp shells, the cohesion (c) value is 9.952 kPa and the friction angle (φ) 9.564 degrees. In a mixture of 100% native soil + 10% shrimp shells, the cohesion value (c) was 11.223 kPa and the friction angle (φ) was 11.365 degrees. In a mixture of 100% native soil + 15% shrimp shells, the cohesion value (c) was 8.920 kPa and the friction angle (φ) was 8.978 degrees.

Keywords: Pond Area, Soil Shear Strength, Shrimp Shell, Soil Stabilization, Clay Soil