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All Journal JURNAL KARYA TEKNIK SIPIL
Siti Hardiyati
Departemen Teknik Sipil FT. UNDIP JL. Prof. H. Soedarto SH., Tembalang, Semarang 50275
Civil Engineering, Building, Construction & Architecture

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STABILISASI TANAH LEMPUNG EKSPANSIF GODONG-PURWODADI KM 50 MENGGUNAKAN PROSES ELEKTROKINETIK DENGAN STABILISATOR ACCU ZUUR DAN KAPUR Wisnu Permadi; Brian Kusuma Pradipta; Siti Hardiyati; Bambang Pardoyo
Jurnal Karya Teknik Sipil Volume 5, Nomor 2, Tahun 2016
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Electrokinetic is one of the improvement methods that can be used to reducing water content of the expansive soil, by way of setting the right distance configuration of katode and anode which carrying electricity to the soil in definite distance and period. This research using accu zuur as stabilizer that helps to release water particle and flow the water from anode to katode as manifesatation of electroosmosis tendency. Results show optimum conditions from stabilization is on 20% of accu zuur, 24 hours of electrokinetics period, 25cm distance of electrode configuration and 56x of compaction.It gives results the rising of shear strength 3,557 kg/cm3 from native soil 1,799 kg/cm3. Swelling potential also decrease to 0,46% with swell pressure 0 kPa. The conclusion is accu zuur only has a function to reduce water content of the soil and lime can bind the soil particle of expansive clay soil,so the swell turn smaller than before.
ANALISA STABILITAS LERENG CLAYSHALE PADA PEKERJAAN PEMBANGUNAN JALAN TOL BAWEN-SALATIGA PAKET 3.1 STA 22+900 – STA 23+500 Fathan Zul Waskito; Goji Pamungkas; Siti Hardiyati; Kresno Wikan Sadono
Jurnal Karya Teknik Sipil Volume 5, Nomor 2, Tahun 2016
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

The attempt to provide toll road in Java has been developed rapidly. In the Solo-Semarang route, the construction has reached packet 3 Bawen-Salatiga. An issue in packet 3 appeared in packet 3.1 between Sta 22+900 - Sta 23+500 because it is located in a clayshale deposit area (Kerek Formation). Based on the N-SPT data obtained from drill test for excavation structure, clayshale was not found in the layer. From the soil description and geological review, the layer was dominated by tuff breccia with andesite fragment. In the embankment of STA 22+975, CPT and geoelectric tests were taken and the result from geoelectric showed the presence of claystone which is the main material of Kerek Formation. Therefore, the embankment is the weakest zone by ground movement. FEM analysis results were compared using LEM method by Plaxis 8.2 and Slope/W 2007. FoS acquired from the two methods showed insignificant changes. The static load calculation result proved that the FoS of excavation and embankment structure was bigger than the minimum standard required by USACE (FoS>1.30). FoS of embankment with two configurations had a considerable value. The application of quake load in accordance with 2010 earthquake zone map with 0.44 g acceleration revealed a variety of FoS. In terms of the security over the excavation, the FoS was bigger than the minimum requirement, which is >1.10.
Co-Authors Bambang Pardoyo Brian Kusuma Pradipta Fathan Zul Waskito Goji Pamungkas Kresno Wikan Sadono Wisnu Permadi