Field tests on jet-grouting self-boring anchors

 Jet-grouting is a mature technique for foundation treatment.Combination of the jet-grouting with geological drilling rig will make a new type of self-boring anchors.Tests on the uplift destruction of three full-scale anchors are introduced,and the test results are compared with those of two traditional full-scale anchors.The jet-grouting self-boring anchors use the jet-grouting to form a better anchor-body in the soft soil by taking strand to the default soil with jet grouting,which overcomes the traditional deficiency that the anchor bolts can not be used in the soft soil.Another advantage is that the jet-grouting self-boring anchors can make an expansion of the end(variable cross-section),which can significantly raise pull-out force.The study results will provide more complete experimental data of high pressure jet-grouting self-boring anchors.And it is of great significance to use the present anchors in projects.