PEMANFAATAN BAHAN LIMBAH FLY ASH DAN BANTAK DALAM RANCANGAN KONSTRUKSI DINDING PENAHAN TANAH
| Main Authors: | , Purwanto, , Dr. Ir. Ahmad Rifa'i, MT |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2011
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/88735/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=50403 |
Daftar Isi:
- Landslide is a type of geological disaster, which often happens in Indonesia. This disaster often happens especially in rainy season. It causes some lost, both material and immaterial (victims of the disaster). It happens due to the movement of soil mass through either slide or curve surface in the mountain slopes, then the process of moving soil will cause the land to slide. Retaining wall is a way which bounds the soil mass to prevent it�s movement. One other thing is gabion construction, it functions to protection the soil mass especially in the mountain slopes along the river stream. Specially in river basin, this gabion construction can stabilize the mountain side or slopes along the river stream. This gabion construction exploits local waste materials as such fly ash the replacement of the river stone used in the gabion construction. Coal Ash (fly ash and bottom ash) are the left of coal combustion which is the important environment issue. The objectives of this research are to take the advantage of the fly ash and bantak merapi in design of retaining wall structure especially the stability of the slope, Had a share give contribution to the Civil Engineering field especially of the Geotechnical Engineering field. This research to find out the physical, mechanical and chemical characteristic of it�s effects to the environment and to ensure that this retaining wall construction (gabion) is harmless to the environment and acceptable for the society. The mix design process result using fly ash variation of 0%, 20%, 40%, 60% and 80%, will be picked one based on the SNI and ASTM and the suitable fly ash variation will be the concrete block model retaining wall structure (gabion construction). Design of concrete block by use of 40% variation with length size 0,75 m, high and width 10x10 cm and concrete heavily block 12,375 kg. The result of gabion construction analysis by using the coal ash and merapi bantak which uses variation of 40% based static load shows the factor of safety against overturning (SF) 3,3, the factor of safety against sliding (SF) 2,2 and bearing of capacity foundation 118,24 kN/m2, while based on the temporary load (earthquake force) shows the factor of safety against overturning (SF) 2,9 the factor of safety against sliding (SF) 1,9 and bearing of capacity foundation 121,26 kN/m2. The result above are affected by the moist unit weight of the gabion material of 22 kN/m3 by using fly ash variation of 40%. Fly ash variation can be economized cement in using for gabion material construction. From the slope stability, the gabion construction increases the safety factor (SF) of slope stability. The analysis slope stability uses Plaxis v 8.2, shows the safety factor (SF) original slope condition of 1,4 while for the slope soil erosion is shows the safety factor (SF) 0,8 and the gabion construction installed slope increases to safety factor (SF) 1,6 based static load which makes the slope stabile and safe, while based on the temporary load (earthquake force) shows the factor of safety factor (SF) original slope condition of 1,1 while for the slope soil erosion is shows the safety factor (SF) 0,8 and the gabion construction installed slope increases to safety factor (SF) 1,2.