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| FIELD TEST ON SOIL NAILS AND STABILITY ANALYSIS OF SOIL-NAILING RETAINING STRUCTURE IN SOFT SOIL AREA |
| (Department of Building Engineering，Tongji University，Shanghai 200092，China) |
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Abstract The effect of soft substratum on the stability of soil-nailing walls is discussed through analysis of project cases. The deformation characteristics of soil-nailing walls in soft soil area are revealed. Some measures are proposed to control the deformation. Besides，field tests are carried out through pulling out soil nails in soft soil area with high speed and low speed respectively. The test results are compared and the characteristics of the resisting force when pulling out the nails from soft soil are analyzed. Based on the test results，a quick pullout capacity test method is proposed. Some suggestions are put forward for the design of the length and space of soil-nails in soft soil area；and some opinions are proposed about the current soil-nailing retaining structure design code.
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Received: 06 January 2011
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2011, Vol. 30 
