Uji Beban Timbunan yang Diperkuat dengan Sistem Pelat Terpaku pada Tanah Gambut

One of the problems with peat soils, when subjected to imposed loads of construction, is the very high compression and long-term excessive settlement. The embankment can be built on peat soil, but it needs reinforcement that can contribute to increasing the stability of the embankment. The nailed slab system, as reinforcement, is expected to reduce settlement and increase the stability of peat soil. The aim of this paper is to study the effect of pile length and distance on the reduction of settlement in both monolithic and non-monolithic piles. The embankment load test was conducted on 70 cm x 120 cm plates, which were reinforced pile with different lengths and distances in the peat soil layer. The analysis was conducted on the reduction settlement of monolithic and non-monolith pile. The results showed that the length and distance of the pile had an effect on the reduction settlement. Changes in pile length are more dominant reducing settlement compared to changes in pile distance. Pile connection with slab has a significant effect on different lengths of piles than different distances piles.

Settlement of Funing Natural Clays under 14-Year Embankment Loads: A Case Study

The settlement behavior of soft natural clays under a 14-year embankment load is investigated by obtaining the high-quality undisturbed samples of soft natural clays beneath a constructed embankment. It is found that the conditional way of determining the settlement by combining the layerwise summation method of calculating settlement, the Osterberg method of determining the embankment load-induced stress in subsoil, and the compression parameters determined from high-quality undisturbed samples overestimates the settlement, compared with the field observations. The key cause is that the Osterberg method overestimates the vertical superimposed stress in this case. The modified method of determining the vertical stress in subsoil suggested by the authors is adopted for improving the accuracy of vertical superimposed stress calculated. The balance among errors in the settlement calculation model, determination of vertical superimposed stress induced by embankment loads, and measurement of compression parameters are also discussed.

ANALISIS CREEP TERHADAP MATERIAL PENGISI LUMPUR YANG DIGUNAKAN DI KAWASAN REKLAMASI

Reklamasi daratan adalah proses pembuatan daratan baru dari dasar laut dengan cara menimbun areal reklamasi tersebut dengan menggunakan material pengisi. Material pengisi tersebut dapat berupa batu, pasir bahkan lumpur. Penggunaan lumpur sebagai materal pengisi dapat dikatakan kontroversial mengingat lumpur dapat mengalami konsolidasi primer dan sekunder. Konsolidasi sekunder atau yang biasa disebut creep, adalah penurunan yang berjangka panjang dan berkemungkinan besarnya melebihi konsolidasi primer. Namun dalam realita, fenomena creep jarang sekali diperhitungkan oleh perencana. Penelitian ini bertujuan untuk membuktikan bahwa fenomena creep sangat penting untuk diperhitungkan. Untuk menganalisisnya digunakan program dengan metode boussinesq. Penelitian ini dilakukan dengan menghitung besar creep yang terjadi pada material pengisi lumpur dengan menggunakan embankment load dengan tinggi yang berbeda. Simulasi ini menunjukkan bahwa creep sangat penting untuk diperhitungkan.