The engineering geological characteristics of line are not playing, playing with full IB bedrock and IIA, not dry, not wet, and the two geological hard shoulder, should make special complex layer area includes you accept the weak IA2, IA1, EDQ in IB is alternately, the original rock in the area the fault strength grade III - 1, the original low around the stone, stone was changed to reduce the strength, compression, it can be said that the hi MT o Noni roof. The muscle and two shoulder scales the whole process from the jet high mountain Xu n. High G to river bed procedure
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