Abstract
Most of the earth embankments in central Vietnam are usually built with clays. Some types of clays in this area are swollen. If they are used to build dams, it can be detrimental to the embankment. Based on the results of laboratory test analysis, the authors investigated swelling characteristics of some soil types in the study area and found that the swelling rate of soil increases with the compaction of the soil sample. When swelling under pressure in approaching water over time, the swelling coefficient of the soil decreases significantly. Thus, swelling clays can be used to make dams, but they must be put in the appropriate position for the purpose of not swelling freely.
Highlights
Expansive soils are encountered at some construction sites in the Central Vietnam
There are a lot of soil works built in Central Vietnam such as hydroelectric dams, hydraulic engineerings, transport infrastructures
This paper presents the changes of swelling characteristics of various compacted samples used to build dams in the Central Vietnam within the condition of the experienced samples are kept tightly and soaked in water as time elapses
Summary
Expansive soils are encountered at some construction sites in the Central Vietnam. There are a lot of soil works built in Central Vietnam such as hydroelectric dams, hydraulic engineerings, transport infrastructures. Water can permeate to the deeper soil layers through these cracks The more water they absorb the more their volumes increase. This produces a cycle of shrinkage and swelling that causes the soil to undergo great amount of volume changes. This movement in the soil results in structural damages especially in lightweight structures such as sidewalks, driveways, basement floors [2]. This paper presents the changes of swelling characteristics of various compacted samples used to build dams in the Central Vietnam within the condition of the experienced samples are kept tightly and soaked in water as time elapses
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