Slope Reinforcement Study Using Geotextile

The development of transportation in Indonesia causes the need for land for road use to increase. This encourages people to make the best use of every available land, one of which is in hilly and lowland areas and the topography tends to vary. The development of embankment slopes above the soil with less bearing capacity results in large subsidence and lateral movement. The purpose of this study was to determine the effect of using Geotextile type TS 600 as reinforcement in soils that have low bearing capacity. From the results of laboratory tests, it is known that Geotextile Type TS 600 can reduce deformation that occurs in soft soil. The deformation that occurs in unreinforced soil with a load of 4 kN is -45.5 mm; while the deformation that occurs in the reinforced soil using geotextile type TS 600 layer 1 is -40.31 mm, layer 2 is -35.15 mm, and layer 3 is -30.25 mm. It is known that Geotextile Type TS 600 can reduce the deformation that occurs in soft soil.


Introduction
The increasing progress of transportation in Indonesia has resulted in an increase in the need for land for road use. This `encourage humans to make the best use of every available land, one of which is in hilly areas and lowlands and the tofography tends to vary.
Merauke Regency is an area that has an area of 46,791.63 Km 2 or 14.67% of the total area of Papua Province and is the largest district in Papua Province. The condition of soil types that tend to have low soil bearing capacity, this is what causes practitioners to build a road with artificial slope reinforcement such as embankment slopes, road slopes, excavated slopes or dam slopes. In order to realize a construction that is comfortable, durable and of course safe, it is necessary to analyze the safety of artificial slopes in planning.
The level of safety of an artificial slope is influenced by several factors, including the slope factor and the load acting on it. Artificial slopes with large loads and steep slopes can cause landslides. This condition is of course very dangerous for the driver, so a slope reinforcement is needed. The use of geotextile and soil reinforcement is one of the technological innovations that has been widely used in recent years. The use of this geotextile can help in various planning, one of which is the reinforcement test of the slope using a non woven geotextile type TS 600. With this problem, the author takes the title "Slope Reinforcement Modeling Study Using Geotextile".
• Soil reinforcement test inspection model using the geotextile Type TS600 material. Using a box made of 1.2 cm thick steel plate, which consists of steel which has dimensions T = 50 cm x W = 60 cm x P = 120 cm. • Hydraulic pump (Hydraulic Jack) : to put a load on the plate. • Dial indicator (Dial Gauge) : to see the value of soil deformation in the test model.

Research Implementation
• Testing of water content is adjusted to SNI. [1] The tools used are ovens, cups, electric scales. • Testing of soil density is adjusted to SNI. [2] The tools used are hot plates, picnometers, ovens, electric scales, spatulas. • Testing of grain analysis is adjusted to SNI. [3] The tools used are sieve filters, brushes, electric scales, water hoses, cups. • Atterberg boundary testing devices are adjusted to SNI. [3], [4] Test equipment used is casagrande, cup, glass with dimensions of 0.9 cm x 45 cm x 45 cm, spatula, oven. • Compaction test equipment adjusted to SNI. [5] The tools used are ovens, standard hammer proctors, standard proctors, electric scales, jacks.

Soil Classification
In this study, the results of laboratory tests for grain size that passed filter no. 200 is 88.38% because greater than 35% is classified as clay soil and in the AASHTO classification system it belongs to groups A-4 to A-7.

Soil Properties
The table belowis a recapitulation of the results of the physical and mechanical properties of the soil in the laboratory with soil materials from the wasur area : Optimum Water Content 11.25%

Laboratory Testing Results
In slope strengthening studies using geotextile loading on laboratory scale testing using load sizes with values ranging from 0. In table 2 above, it can be seen that the deformation that occurs with a 4 kN load on the unweighted soil is -45.5 mm. Deformation that occurs can be seen in Figure 2.  In Table 3 above, it is known that the deformation that occurs with a load of 4 kN on the soil reinforced with the Type TS 600 geotextile is -40.31 mm. The deformation that occurs can be seen in Figure 3.     Figure 4 below.