朝阳特大桥岩溶桩基施工技术研究

以朝阳双线特大桥岩溶桩基施工技术工程为例,从工程概况、工程地质情况、施工前准备工作、岩溶桩基钻孔施工方法、护壁泥浆的选用、桩基施工常见事故的处理6个方面对其岩溶桩基施工过程展开分析,并针对其自身特征提出多种施工方案策略,旨在确保其顺利完成施工,达到工程进度与经济效益的共赢目标,同时为类似施工现场提供参考依据。

Influence of preload discreteness on air-operated separation process of low-shock separation device

To investigate the influence of design parameters on the performance of separation device,the structure and air-operated test of a low-shock separation device are introduced and analyzed in this paper.According to the law of energy conservation and aerodynamics,a mathematical model is built.Because the preload used to ensure the connection reliability has the discreteness,which will influence the separation process,the influence of preload discreteness on the air-operated separation process is simulated and tested.Simulation results are consistent with the experimental results.It is shown that the change of preload has an obvious influence on the separation process.The study is useful for the design and optimization of separation device.