开槽埋设柔性管竖向土压力计算探讨

Analysis of Vertical Earth Pressure on trench-buried Flexible Pipelines

开槽埋设钢管等柔性管时 ,开槽宽度对于作用于管道上的竖向土压力有着很大的影响 ,这已被现场实测和模拟试验结果所验证。而目前的一些计算方法均未考虑此因素的影响 ,以致计算结果均与实测结果有较大的差距。为此本文根据实验研究的结果 ,建立了新的滑裂面计算模型 ,推导出了土压力计算公式 ,并被实测结果所验证 ,可供管道工程设计参考。

It has been proved,through field-measured data and model test results,that trench width has much effect on vertical earth pressure on trenched flexible pipes such as steel pipelines.But traditional method doesn't consider such factor,in result,outcome from calculation has a lot difference than that from measurement in tests.Accordingly,this paper constructs a new model of slipping interface and presents calculating formulas,which can be used as reference for that it has been validated by experimental results.