A STUDY ON THE CALCULATION OF DEFORMATION OF CEMENT DEEP MIXING COLUMNS THAT STABILIZE SOIL EROSION AND LANDSLIDES ON RIVER ROADS

Abstract

The erosion of riverbanks in the Mekong delta has become a serious issue. For instance, in Tien Giang province, riverbank erosion has led to landslides which have destroyed many buildings and roads on both sides of the river, causing devastating consequences to the people who live along the sides of the river.  One method that may potentially minimize the damage caused by landslides is the method of cement deep mixing (CDM) columns, which aims to stabilize the slope of the canal bank. In this study, a series of finite element problems were analyzed using Plaxis V8.2 software under different conditions regarding the water level in the canal and the shape of the CDM columns for stable improvement of the slope of the canal bank. In addition, the effects of cement content on the formation of CDM column’s strength are considered in this study. The results show that the following characteristics can allow CDM columns to effectively stabilize the slope of the canal bank and prevent landslides along Cho Gao canal: 1) Composition: 20% of cement content; 2) Dimension and configuration: 0.6m in diameter, 10.3m in length, arranged in 5 rows with the spacing of 1m.