Application of ANSYS 3D FEM in studies of surface deformation caused by pipe jacking

EDP Sciences - Tập 12 - Trang 633-637 - 2007
Fabin Li1, Kun Fang1, Hechao Li1
1Sichuan Research Institute of Territorial Surveying and Planning, Chengdu, China

Tóm tắt

By using site observation data and establishing 3D model using ANSYS software, this paper has discussed the strain change of stratum stress during process of jacking-in and the impact of machine head on ground surface under different frontal resistances. Analysis of the two cases shows that soil pressure reaches its maximum point when the soil is right above machine head, and soil stress will gradually decline when machine head passes over it. It also shows that impact brought by pipe-jacking construction on stress change of the surrounding soil is limited. The thesis suggest that road surface should be consolidated and soil condition be improved before construction to prevent loss and disaster caused by road surface deformation, jacking force can be increased so that jacking efficiency can be enhanced when ground stratum is well filled with soil, but the frontal resistance facing machine head should be equal to surrounding soil pressure in order to avoid rise of ground surface.

Tài liệu tham khảo

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EDP Sciences

Tập 12

633-637

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