回填荷载下桶式基础结构土压力原位试验研究

In-situ test on soil pressure test of bucket-based structure under backfilling load

桶式基础结构是针对淤泥质海岸工程建设实际需要开发出来的新型结构,通过现场原位试验研究单边回填情况下桶体内外土压力变化,经过数据分析得出桶式基础结构土压力变化规律和不同土层在回填荷载作用下的破坏状态。实测数据显示淤泥在回填荷载作用下达到破坏,土压力计算不符合经典土压力计算理论,黏土在回填荷载作用下未达破坏,土压力计算可采用经典土压力计算理论,同时实测数据显示,桶体稳定计算可以采用土压力平衡进行估算。文章所得结论可为桶式基础结构稳定计算方法优化提供参考。

Bucket-based structure is a new structure developed according to the actual needs of silty coast engineering construction. The variation of soil pressure inside and outside the bucket is studied through in-situ test under the condition of unilateral backfilling. Through data analysis, the variation law of soil pressure of bucket-based structure and the failure state of different soil layers under backfilling load are obtained. The measured data show that the silt is damaged under the backfilling load, the soil pressure calculation is not in conformity with the classical soil pressure calculation theory, clay is not damaged under backfilling load, soil pressure calculation can adopt the classical soil pressure calculation theory, at the same time, the measured data show that the soil pressure balance can be used to estimate the bucket stability. The conclusions of this paper can provide reference for the optimization of the bucket-based structure stability calculation method.