PERENCANAAN PENAMBAHAN TINGGI TANGGUL DALAM MENGATASI LUAPAN LUMPUR LAPINDO SIDOARJO JAWA TIMUR

The Lapindo Mudflow that occurred in 2006 resulted in the construction of embankments around the area to prevent the mudflow from spreading to the surrounding area. Because the function of the embankment is very important to hold back mud, the design and durability of the embankment is planned with an embankment area reaching 5.58 km2. Estimated storage volumes for the next few years are used to prepare for raising the embankment and also the strength of the embankment in the next few years. The method used to design the embankment is to use appropriate data first, including soil data, rainfall data and temperature data in the area. as a consideration in calculating the estimated mud volume for embankment design assisted by Geostudio software.
The embankment planning for 2040 after going through calculations has a storage volume of 67,989,000.00 m3 with a planned storage volume height of 12.18 m with a standard guard height of 0.60 m from the mud surface and an embankment width of 5m with an inspection road. Taking into account the normal stability value on the outside of 1.606 > 1.5 and on the inside of the embankment 2.369 > 1.5, the safety factor is considered adequate, and the seepage discharge is smaller than the planned seepage discharge with a calculated value of 6.6 x 10-4 m3/s < 2.175 m3/s. From the results of the stability and seepage discharge calculations, suitable results were obtained and the embankment planning was considered satisfactory