ANALYSIS ON CONSOLIDATION SETTLEMENT OF SOFT CLAY IMPROVED USING PVD BASED ON FINITE ELEMENT METHOD

• Main Author: MARSHA - NIM : 25015063 , MAIRA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28719
• Institution: Institut Teknologi Bandung

<p align="justify">Ground improvement with preloading and vertical drains is a popular, if not the most popular, ground improvement technique for decades in geotechnical engineering. It gains the popularity because of its easy implementation and its relatively cheap construction, and, to some degree if conducted properly, provides a satisfying result. This type of improvement is aimed to speed-up significantly setlement to occur due to fill over a soft and highly compressible soil. Without improvement, settlement will occur in a long period, even after construction of the upper structrues finishes, resulting in problems to the upper structures. Cracks on floors and/or building walls, improper drainage system, undulating road surface, even building tilting, may occur if a significant settlement is still experienced after construction of the upper structures. With improvement, settlement will significantly be reduced to a minimum and the aforementioned problems will not be experienced. The first comprehensive treatment of ground improvement with preloading and vertical drains was presented by Barron (1948) for radial drainage based on Terzaghi's one dimensional consolidation. Modification on Barron’s work was made by Hansbo (1979) to be applied to band-shaped PVD, and to include consideration on disturbance, and drain resistance effects. Nowadays, with the advent of finite element method (FEM) in geotechnical engineering, the use of 2D plane-strain model is expected to provide a comprehensive analysis for vertical drains problem because by using FEM all necessary results (settlement, pore pressure, lateral deflection) could be obtained and verified by field monitoring. This thesis analyses road embankment over a thick soft layer without and with improvement using PVDs to provide comparison between the both conditions, and the calculation results are compared to the actual field monitoring results.<p align="justify">