Aplikasi Kolom Kapur Untuk Mengurangi Pengembangan Tanah Ekspansif Di Desa Pengengat Kecamatan Pujut Kabupaten Lombok Tengah

The growing population has an impact on the increasing need for housing. A comfortable house can be made if the ground is fine. Pengengat Village in Pujut District has expansive soil which has high swelling-shrinkage properties. This activity aims to provide an understanding of the characteristics of expansive soil and how to improve it. This activity is divided into three stages, including: 1) site survey, 2) counseling, and 3) creating a lime column model. The survey results show that people in Pengengat village do not understand the characteristics of expansive soil and they also do not know how to improve the soil phenomenon. The floors and walls of the house were cracked and some were split. Poor drainage conditions also contributed to the damage to their homes. After carrying out these activities, the residents began to understand the characteristics of the expansive soil and how to improve it. We make three lime columns with a diameter of 25 cm and a depth of 75 cm. The distance between the lime columns is 1 m. For evaluation purposes, we take soil samples from each hole, the soil samples will be tested to determine the level of swelling

Force and Settlement Characteristics of an Embankment on Soft Consolidating Soil with Lime Columns

Embankment supported on soft soil with lime column is analyzed. The lime column is modeled using a two noded plane frame element with three degrees of freedom (DOF) (two transnational and one rotational), whereas the soil stress- strain behavior is presumed to be non-lining and modeled by a Cam-Clay model. The properties of lime column is obtained from a stress- strain curve obtained from a laboratory test. It is concluded from the study that addition of lime column in soft soil reduces the settlement after the construction.

Geotextile Encapsulation as Protection to Lime Column under Shear Load

Deep lime stabilization such as lime column, can effectively improve the problematic soft clay through stabilization, settlement reduction and embankment stabilization. Nevertheless, the reduction of lime column load capacity was often encountered due to the column lateral displacement which was induced by high lateral earth pressure in embankments and deep excavation. In order to protect and enhance the mobilization of lime column strength, geotextile encapsulation was proposed for lime column. In this study, large shear box tests were conducted on lime column and geotextile encapsulated lime column (GELC) stabilized Pontian marine clay samples with different column sizes and curing ages, in order to investigate the performance of geotextile encapsulation on lime column in Pontian marine clay under shear loading. It was found that geotextile encapsulation effectively increased the horizontal shear resistance of lime column and protected the column from defect due to lateral displacement, especially at early age when modification was still in process. Geotextile encapsulation also successfully protected lime column from shear and bending failure under lateral load.