Experimental Study on the Complex Contact Frictional Property of an Ultralong Distance Large-Section Concrete Pipe Jacking and Prediction of Pipe String Stuck

<div>Perforating and deslagging of pipe string. (a) Deslagging hole. (b) Crushed ballast. (c) Coarse-grained stone. (d) Sticky material.</div>

Advances in Materials Science and Engineering

fig4

Figure 4

Figure 4: Experimental Study on the Complex Contact Frictional Property of an Ultralong Distance Large-Section Concrete Pipe Jacking and Prediction of Pipe String Stuck 

Figure 4 | Experimental Study on the Complex Contact Frictional Property of an Ultralong Distance Large-Section Concrete Pipe Jacking and Prediction of Pipe String Stuck 