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Mechanical behavior of parallel pipelines under foundation pit excavation

Han C., Ma J., Zhang J.

Engineering Transactions

2018

Vol. 66, iss. 1

93--106

In order to study the effect of foundation pit excavation on mechanics of parallel pipeline, a pipeline-soil interaction model was established based on the finite element principle. The deformation of the pipeline by the foundation pit excavation were analyzed. Effect regulations of parallel distance, pipeline parameters and foundation pit parameters on the deformation of the pipeline were studied. The results show that there are two maximum stress areas in pipeline under the action of excavation. The upper and lower surfaces of the pipeline also appear the large stress area. The pipeline has horizontal and vertical displacements. With the increasing of the parallel distance, the deformation of the nearest pipeline increases, but the deformation of the farthest pipeline decreases. With the increasing of the radius-thickness ratio and distance between the foundation pit and the nearest pipeline, the deformation of the pipeline decreases. With the decreasing of the foundation pit width, the deformation of the pipeline decreases. Effect of the foundation pit’s length on the pipeline is not obvious.

Walidacja modelu Hardening Soil small w badaniach trójosiowych gruntu z zastosowaniem czujników napróbkowych

Bogusz W., Witowski M.

Inżynieria Morska i Geotechnika

2015

nr 3

262--266

Potrzeba bardziej precyzyjnego rozpoznania charakterystyki naprężenie-odkształcenie (s-ε) gruntu w zakresie odkształceń najczęściej występujących w czasie pracy konstrukcji (0,001% do 0,5%). Wyniki uzyskane z pomiarów za pomocą czujników napróbkowych z dwóch serii badań trójosiowych. Odniesienie rezultatów badania do wyników symulacji badania z zastosowaniem modeli konstytutywnych gruntu.

The necessity of more precise investigation of the stress-strain (s-ε) relation-ship in the range of strains most commonly occurring during the structure work (0,001% to 0,5%). Results from two series of triaxial soil tests with local strain transducers. The relation of the test results to the results of numerical simulations of the tests obtained with use of commonly applied constitutive soil models.