|Table of Contents|

Numerical Simulation of Vertical Bearing Capacity of Closed Underground Diaphragm Wall(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第03期
Page:
311-315
Research Field:
地质工程
Publishing date:

Info

Title:
Numerical Simulation of Vertical Bearing Capacity of Closed Underground Diaphragm Wall
Author(s):
ZHANG Bo1;  CHEN Xiao-dong2
(1.Gansu Investigation Institute of Hydrogeology and Engineering Geology, Lanzhou 730020, Gansu, China; 2.CCCC Highway Consultants Company Limited, Beijing 100088, China)
Keywords:
underground diaphragm wall;  loess;  vertical bearing capacity;  numerical simulation;  FLAC-3D
PACS:
P642;TU43
DOI:
-
Abstract:
Based on the indoor test of model, the differences of vertical bearing capacity of closed and single underground diaphragm walls were discussed, the software FLAC-3D was used in numerical simulation in order to supply the indoor test of model, the influences of deformation modulus, density, cohesion and internal frictional angle on vertical bearing capacity of closed underground diaphragm walls were studied. The result showed that the mechanism of outside friction resistance in closed and single underground diaphragm walls were mostly the same, but the mechanism of inside friction resistance in closed underground diaphragm wall was more complex because of the existence of core; closed and single underground diaphragm walls could be considered as end support friction type; vertical displacement and wall axial force deceased significantly with the increase of deformation modulus in soil around the wall; the influence of density on sedimentation of closed underground diaphragm wall was not significant; effect of cohesion on lateral friction drag was controlled by relative displacement between the soils of underground diaphragm wall; internal frictional angle had considerable influence on the vertical bearing capacity of underground diaphragm wall only when the sedimentation of underground diaphragm wall was more than 20 mm.

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Last Update: 2010-09-20