(1) I had nearly caused him a two-shot penalty, and probably incalculable psychic harm.

(2) Research conclusions: The technique and result of two-shot grouting were not good as that of cement mixture pile, but it had features of simple operation and low cost.

(3) With its controllable solidifying velocity and vast raw material source, cement-water glass(CS)two-shot grouting has found wide applications in many geotechnical projects.

(4) Double Attack – quick two-shot attack doing a total of 10% heavy. This attack will happen every 10 seconds.

(5) There should be a large proportion of good two-shot holes, two or three drive-and-pitch holes, and at least four one-shot holes.

(6) One-shot binding Perfect binding with one application of hot-melt glue only. As distinct from Two-shot binding.

(7) This paper introduces the treatment and application of construction technology of cement-water glass two-shot grouting in the tunnel collapse.