Theoretical Calculation and Analysis of Overall-carrying-soil Effect of Shallow Buried Rectangular Pipe Jacking
Compared with circular jacking pipes,rectangular ones have higher space utilization so that are widely used in the construction of various underground spaces.But,the friction between the shallow buried rectangular jacking pipe and the above soil will increase as the jacking distance increases and induce the overall-carrying-soil effect.Based on the existing model,the interaction between the above soil and adjacent soils is considered and a new overall-carrying-soil effect model is established.The relative error between the new model and the engineering results is 9.31％,which is 6.76％higher than the existing model.The new model analysis shows that the larger the width of the rectangular jacking pipe,the smaller the burial depth,and the larger the pipe-soil friction coefficient,overall-carrying-soil effect is more likely to occur,and the jacking distance is relatively smaller during the failure.
rectangular pipe jackingshallow buried pipe jackingoverall-carrying-soil effecttheoretical model
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