Abstract：Bamboo reinforced soil technology has been widely applied to foundation reinforcement engineering due to its advantages of environmental friendliness and economy. Taking the low-grade highway subgrade improvement of oil well site in Xingwen County，Southern Sichuan as example，the feasibility of bamboo reinforced silty clay technology was discussed and silty clay highway subgrade cross sections reinforced with bamboo were designed and constructed. The basic physico-mechanical parameters of bamboo wood，silty clay and pulverin silty clay were obtained by means of experiments，and mixing ratios，20% pulverin or 6% lime，of improved silty clay were determined. Then，Based on FLAC3D，the optimal subgrade cross-section dimensions of the bamboo reinforcement silty clay were determined，and the best bamboo layer distance is 1.0 m. Finally，the rebound deflection values(2.69 mm) of the subgrade was measured with the monitoring technology. It is shown that the rebound deflection of the subgrade can match the requirements of the low-grade highway subgrade，and it is feasible that bamboo bars are applied in reinforced silty clay low-grade highway subgrade.
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2014, Vol. 33 
