Analysis of load test in open caison, instrumented in depth, submitted to horizontal stress, in an unsaturated high porosity soil diabasic

• Grant number: 12/51168-6
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2013
• End date: January 31, 2014
• Field of knowledge: Engineering - Civil Engineering - Geotechnical Engineering
• Principal Investigator: David de Carvalho
• Grantee: David de Carvalho
• Host Institution: Faculdade de Engenharia Agrícola (FEAGRI). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

This research will be conducted through load tests on a caisson instrumented in depth. Three caissons are built with diameter of 0.80 m, depth of 9.0 m (impenetrable) and base width of 1.60 m. One caisson will be tested and the other two will be the reaction during the test. The site is the Experimental Field of Unicamp, where the subsoil is constituted of an unsaturated silty clay, high porosity, originally from diabase. There will be carried out two load tests, one with the soil in its natural moisture content and other after flooding the superficial soil for 48 hours. The instrumentation will consist of load cell at the head of the caisson and the use of inclinometer to measure horizontal displacements in depth during the load test. There will be obtained the load versus superficial displacement behavior of horizontal pipe, the re coefficient of horizontal reaction of the soil, and will be verified the applicability of formulations used to predict the behavior of deep foundations loaded horizontally. The caissons were already built in the site and the presentation of this project is to solicit funds for the use of the inclinometer during the load test. (AU)