CONCLUSION

Liquefaction are process that cause the strength and stiffness of soil decrease by earth

shaking. It only occur in saturated soil, which is commonly area that are near river, lakes, bays,

and the oceans. The choice of ground improvement technique depends on geological formation

of the soil, soil characteristics, cost, availability of backfill material and experience in the past.

Because of this phenomenon, we had analyses the possibilities of situation on every method

work. As the analyses is done, we decided and conclude for the best method that can change,

safe the properties and might also act as one of the precaution and help reduce the problem.

Within this method we can save much more. In the preloading and vertical drain process,

its help in increasing the shear strength. Preloading generally refers to the process of

compressing the soil under applied vertical stress prior to construction and placement of the final

construction load while vertical drain involves process of installing drain into the ground using a

machine. Vertical drains are used to increase the rate of consolidation, delivering substantial

programmed savings for the build times of earth embankments for many types of land raising

schemes. Besides, process involves surcharge load that help in settlement which cause by the

consolidation of soil.

Using sand also bring good method in this situation which is sand will the increase the

rate of settlement of soil. Sand also can be a good drainage beside can used as a good bonding

between the soils. Coarse aggregate used in this method is to increase shear strength of the soil.

So the soil will be more stable. In this method of study. We combined al the possible method that

can reduce an increase all the situation prevention if it occur. But still the are many existing

options can successfully accelerate the consolidation of soils.