Teras Jurnal
Vol 11, No 2 (2021): Volume 11 Nomor 2, September 2021

PERBANDINGAN PERILAKU PERBAIKAN TANAH METODE PRELOADING VAKUM DAN PRELOADING TIMBUNAN DENGAN ELEMEN HINGGA 2D

Zakwan Gusnadi (Unknown)
Paulus Pramono Rahardjo (Universitas Katolik Parahyangan)
Aswin Lim (Universitas Katolik Parahyangan)



Article Info

Publish Date
02 Oct 2021

Abstract

Abstrak Perbaikan tanah lunak dengan pra-beban (preloading) dimaksudkan untuk mereduksi penurunan pada masa operasional dan meningkatkan kekuatan tanah. Preloading dalam perbaikan tanah lunak biasanya dikombinasikan dengan Prefabricated Vertical Drain (PVD) guna mempercepat proses disipasi air pori. Metode preloading dapat dilakukan dengan cara konvensional menggunakan timbunan ataupun dengan tekanan vakum. Untuk mengetahui perilaku preloading dengan tekanan vakum ini digunakan metode elemen hingga 2D menggunakan program bantu ABAQUS (berasal dari nama alat hitung Abacus). Hasil analisis menunjukan pada hari ke 217 perbaikan preloading vakum menghasilkan penurunan sebesar 1,23 m dan preloading timbunan menghasilkan penurunan sebesar 1,18 m, namun pola penurunan yang terjadi dengan preloading vakum terlihat lebih besar pada 35 hari pertama perbaikan. Pada perubahan tekanan air pori preloading vakum menunjukan reduksi tekanan air pori, sedangkan dengan preloading timbunan tekanan air pori meningkat pada masa konstruksi dan tereduksi pada masa perbaikan. Lebih lanjut pada perilaku deformasi lateral di kaki timbunan, metode preloading vakum menunjukan pergerakan lateral ke arah dalam area perbaikan sedangkan dengan preloading konvensional pergerakan lateral tanah terjadi ke arah luar area perbaikan. Kata kunci: ABAQUS, Elemen Hingga 2D, Perbaikan Tanah, Vakum Preloading Abstract Improvement of soft soil by preloading is intended to lower the settlement of operation time and increasing soil strength. Preloading in the improvement of soft soil usually combined with Prefabricated Vertical Drain (PVD) to accelerate the pore water dissipation process. The preloading method can be done in a conventional way using the embankment or vacuum pressure. To find out the behaviour of preloading with this vacuum pressure, we used the finite element method 2D by using the ABAQUS support program. The result of the analysis shows on the 217th day, vacuum preloading improvement produces a settlement by 1.23 m and the embankment preloading produce 1.18 m, but the settlement pattern that occurs with preloading vacuum was seen to be greater in the first 35 days of improvement. In terms of changes in pore water pressure on vacuum preloading shows that the pattern of pore water pressure is reduced, while with pore eater pressure on preloading heap increased during construction and reduced during improvement. Further on the lateral movement behaviour in the toe of the embankment, the vacuum preloading method shows the lateral movement towards the improvement area while embankment preloading shows the lateral movement occurs towards the outside of the improvement area. Keywords: ABAQUS, Finite Element 2D, Soil Improvement, Vacuum Preloading

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Journal Info

Abbrev

teras

Publisher

Subject

Civil Engineering, Building, Construction & Architecture Engineering Environmental Science

Description

Teras Jurnal is a journal that communicates the results of research within the scope of civil engineering and scientific development as well as aspects of practitioners. The process of manuscript submission is open throughout the year. All submitted manuscript will be screened with double-blind peer ...