Abstract
It is commonplace that the ground near river is thickly covered with soft clay. Thus, in order to prevent it from the natural hazard, it is necessary that local people construct a robust embankment of countermeasure by constructing river bank in the soft ground, with low level of bearing capacity. To solve the problem aforementioned, local people are widely known to apply traditional method such as timber or bamboo pile. To establish this method, the Ministry of Public Works has published a technical guideline for reinforced soft ground before embankment. The guideline shows the process of mattress construction including: 1) cutting the ground for site preparation; 2) installing timber piles; 3) laying geo-grid on top of the piles and; 4) putting and compacting a granular material on the geo-grid. The guideline assists engineers to construct an embankment on the mattress. Unfortunately, the guideline never details a reasonable design based on geotechnical engineering. Hence, this paper aims to propose and discuss, a criterion of bearing capacity of reinforced soft clay using several empirical calculations. The model cases were simulated for small footings subjected by static loading on the mattress. As a result, the calculations will lead to the criterion of allowable bearing capacity of reinforced soft clay with timber pile.
Highlights
Flood and sea wave are two types of frequently occurring natural hazards in many Indonesian islands
Despite the fact it is impossible to curb the occurrence of these natural hazards, it is possible to implement appropriate technologies to mitigate the severe impacts of these natural hazards
The problems in the river dike in Indonesia are commonly conjured by two factors, such as natural and technical situation
Summary
Flood and sea wave are two types of frequently occurring natural hazards in many Indonesian islands. These hazards have led to severe damage to the residential areas located along the coast and dike of the rivers. The problems in the river dike in Indonesia are commonly conjured by two factors, such as natural and technical situation. A notable example of natural situation is seen in Sumatra Island which has almost all the typical problems in Indonesia such as thick soft soil, flood, earthquake and wave attack from sea or river. Before being reconstructed for recovery 300 meters in length and 53 meters in width using concrete plate bridge on the concrete piles, the dike of Tembilahan River has previously collapsed due to heavy rain.
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