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| DISCUSSION ON SUBSIDENCE PROBLEM OF MAN-BORED CAST-IN-PLACE PILE IN HIGH EARTH FILL SECTION WITH HIGH COLLAPSIBILITY |
| Wei Jiazhong，Shang Jihong |
| (Northwest Research Institute of China Railway Engineering Corporation，Lanzhou 730000 China) |
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Abstract Man-bored cast-in-place pile foundation in collapsible loess area，especially in high earth fill section with high collapsibility，often causes subsidence by some reasons and consequently deformation accident of buildings. Based on typical case histories of man-bored cast-in-place pile foundation subsidence of several buildings in certain zone of Lanzhou，the reason of pile subsidence in this zone is analysed and several treatment measures are discussed.
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Received: 15 February 2003
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2003, Vol. 22 
