This article analyzed the relationship between soil resistance in front of pile, ultimate resistance of anchor cable and initial resistance of anchor cable for the pile-anchor composite ridge, and then determined the ultimate bearing capacity of the hoisting pile type ridge, which can pro- vide guidance for the design calculation of similar ridges.

Meanwhile,successful application of anchor pile further reduces the cost of this construction,and it is most convenient for the construction in the abrupt valley,which not only protects ecological environment and facilitates the transportation of construction material,but also serves as guidance for constructing long-span arch bri.

On the basis of mang years of great scale nursery practice and experiment,a complete set of cuttage propagation techniques of Populus tomentosa in respect to stocks choice, cuttings stocks, sand-storing cuttings, choosing the place of nursery garden, hill culture of soil preparation, nursery management lifting and heel-in is described.

Getting rid of regional cartel is imperative;