Softening of slope cause many hills and mountain to have a landslide causing damage to infrastructure and injury to some. In UK an increasing number of landslides has been occurring because of the late study of the stability of the slope. A case study will be presented to show the evaluation of the slope geotechnically.
The study considers the causes of landslides and what measures could be taken to manage the risks of these occurring and is reported elsewhere. This study also show things to consider in the effect of that climate change might have on the design and operation of roads, to identify whether any changes in current practices are required.
The focus of this study is the influence of rainfall in the stability of the natural slope.This study includes in how to predict the possible continuous rainfall to avoid landslides in many areas in UK. This paper shows the study in geotechnical way. Possible solution on many landslides are given to prevent loss of life and possible damage to properties.
The case study presented in this paper was done by the Scottish engineers, to predict possible slope instability that causes landslide because of continuous rainfall. The study location is in the road network of Scotland
In August 2004 a series of landslides in the form of debris flows occurred in Scotland. Some of these affected the A83, A9 and A85, which form part of the trunk road network. These incidents were well reported in the media.
While debris flows occur with some frequency in Scotland, they only rarely affect the trunk road network or for that matter the main local road network. However, when they do impact on the road network the degree of damage, in terms of the infrastructure and the loss of utility to road users, can have a major detrimental effect on both economic and social aspects of the use of the asset. Additionally, there is a high potential for such events to cause serious injury and even loss of life although, fortuitously, such consequences have been limited to date.
The events of August 2004 followed a sustained period of heavy rainfall and, in addition, intense localised storms contributed to the triggering of at least some of the resulting debris flows. Rainfall of up to 300% of the monthly average fell in certain parts of Scotland during August 2004.
Within the recent past, debris flow activity in Scotland has occurred largely in the periods July to August and November to January, but there is no certainty that such a pattern will be continued in the future. However, eastern parts of Scotland do receive their highest levels of rainfall in August. Additionally, climate change models indicate that rainfall levels will increase in the winter but decrease during the summer months but that intense storm events will increase in number. These factors, therefore, may change both the frequency and the annual pattern of debris flow events.
The impacts of such events are particularly serious during the summer months due to the major contribution that tourism makes to Scotland's economy. Nevertheless, the impacts of debris flow events during the winter months should not be underestimated.
Evaluation of the Study
What is a Natural Slope
Slope as defined in Encarta is the maximum angle at which soil can be banked without slipping. The slope can be natural (natural cliffs and hillside) or artificial or constructed (cuttings, embankments, quarries, spoil tips