The length of the soil nail wall used in this design shall be determined according to the principle that the force of each layer of soil nail is uniform and the ratio of the tension of each soil nail to the ultimate bearing capacity of the corresponding soil nail is approximately equal. The longer the length of soil nail is, the higher the pull-out resistance is, the better the stability of soil nail wall is, but if the length is longer than a certain length, the pull-out efficiency will decrease, and the length is generally 5-12m<br>
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