TRIAXIAL TEST WITH DIFFERENT STRESS PATH AND ITS APPLICATION ON EXCAVATION ANALYSIS

• Main Author: ARIFIANTI , PUTRI
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/30019
• Institution: Institut Teknologi Bandung

Trixial test enable to provide information about stress strain and shear strength of soils. It is expected with this kind of test, soil parameters with variation of stress path can be known. In trixial test, it is possible to do the test with various stress paths, which in this thesis, the chosen stress paths would be axial compression and lateral extension as the deflection of diaphragm wall would be the study subject. Sand from Galunggung Mountain would be used with particle size less than 2 mm in diameter (passed US sieve number 10), which make the sand have the code SP based on USCS. For the uniformity of the specimen, the multisieve pluviator would be used. The soil parameter that would be the subject of this test would be Secant Modulus (E50) and internal friction angle (?’) which subjected with various stress paths and different strain rate. The triaxial test would be done with Consolidated Drained type, so the effective and the total parameter would be the same. The soil parameter obtained would become the input of the soil modeling in the Plaxis in deep excavation case. The excavation case which become the study case is based on paper by Nikolinakou et al (2011). This paper is about the deep excavation which have sand as the dominant soil layer, and monitored by inclinometer. Based on the the test, it is obtained that E50 from LE is 1.5 times greater than AC, and internal friction angle (?’) is 0.9 times smaller for LE than AC. In the case study result, it is obtained that with the actual stress path input parameter and hardening soil models, would have the closest result with the inclinometer readings.