Open AccessApplication of tangent modulus method in nonlinear settlement calculation of foundation
Author(s) -
Yucheng Zhang,
Haiying Hu,
Cai-yuan Chen
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/510/5/052013
Subject(s) - tangent modulus , settlement (finance) , foundation (evidence) , tangent , geotechnical engineering , modulus , nonlinear system , consistency (knowledge bases) , field (mathematics) , structural engineering , load testing , foundation engineering , test data , lateral earth pressure , mathematics , engineering , geology , geometry , computer science , physics , law , pile , software engineering , quantum mechanics , world wide web , political science , pure mathematics , payment
Foundation settlement calculation has been a difficult and hot problem in geotechnical engineering study. The problems lies in the large differences between the geotechnical parameters of field and indoor test. The using of the tangent modulus method based on the field loading test to determine the calculation parameters can overcome this shortcoming, and reflect the non-linear of foundation settlement, which is a new progress of foundation settlement calculation. However, compared with other tests, the in situ plate loading test has higher difficulty, and it is also difficult to reflect the characteristics of deep soil. In this paper, by making use of systematic geotechnical test data by Riverside Campus, Texas A & M University, United States, it first examines the feasibility of the tangent modulus method used in sand foundation nonlinear settlement calculation, and then studies on the tangent modulus calculation methods of adopting lateral pressure test, The CTP test and other field tests to determine the different soil layers and lastly tests the results of loading tests for different plate sizes. The results show that the calculated parameters needed in the tangent modulus method determined by the lateral pressure test, The CTP test and other field tests are feasible. In addition, when the parameters thus determined are used in the tangent modulus method to calculate the load experimental curves of different plate sizes, the calculated nonlinear curve has good consistency with and experimental curves.