挡土墙填充缓冲层前后土压力变化规律试验研究

Experimental Study on Earth Pressure Change Laws Before and After Filling Retaining Wall with Buffer Layers

通过挡土墙模型试验,在挡土墙面填充缓冲层,并分别测定挡土墙填充缓冲层前后的静止土压力和主动土压力,研究挡土墙填充缓冲层前后土压力变化规律及不同EPS土工泡沫缓冲层厚度对土压力的影响。试验结果表明:设置EPS土工泡沫缓冲层可有效降低墙后填土的土压力;缓冲层越厚,侧向土压力减小越明显;设置缓冲层后土压力随墙身位移变化规律与无缓冲层时相同。

Through the model test of retaining wall,the buffer layers were filled on the surface of retaining wall,and the static earth pressure and active earth pressure before and after filling retaining wall with buffer layers were measured respectively. Earth pressure change laws before and after filling retaining wall with buffer layers and the influence of different EPS geotechnical foam buffer layer thickness on earth pressure were studied. The results showthat setting buffer layers can efficiently lower earth pressure of backfill behind retaining wall. The thicker the buffer layer is,the more obviously the lateral earth pressure decreases; The earth pressure change laws varying with wall displacement before and after filling retaining wall with buffer layers are the same.