Landslide and Siphon Method

Landslide is one of the major disasters for damage and loss of life in the world.
Every year, this disaster happens. Because of this, many research had been done
and method had been introduced in controlling this disaster and reducing the
effects. The major factor triggering landslide is the excess of pore water pressure
in the soil. The excess of pore water pressure in the slope comes from the
groundwater. Controlling the level of groundwater in the soil is vital in order to
prevent landslide occurrence. This research aims to control the water level in the
soil by the using siphon method and to verify the effects of this system on soil
moisture content. This research also analyzes the influence of rainfall on
moisture content of soil. Soil's moisture content, bulk density, shear strength and
internal angle of internal friction are identified for calculation of factor of safety
(FoS). The siphon model was constructed using pvc pipes and two pails. Data
collections are divided into several parts. For moisture content, six (6) samples
were collected and recorded. From this data, the relationship between rainfall and
moisture content of soil is ploted using graphs. The finding shows that the moisture
content increases with the presence of rainfall from 0.20 gig to 0.30 gig. The
moisture content then slowly decreases to 0.20 at the sixth day. The particle size
distribution and shear box analyses, were conducted in the study. The data were
recorded by using computer and software of ELE international. The results show that
soil with siphon pipe has a cohesion and moisture content of 4.85 k:Pa and 0.3 g/g
compared to the soil without siphon pipe which are -4.00 k:Pa and 0.37 gig
respectively. As such, siphon system can be applied to control the groundwater
level for preventing landslide.