Drying Method for Chinese Fir Lumber with High Temperature Hot-water;

Through the comparisons of skidding efficiency and skidding cost on agricultural vehicle,wooden handcart and manual skidding method,forest environment factor and the influence on the landslide after felling were synthetically analyzed from the two aspects of economic benefits and ecological benefits,so as to provide the scientific basis for rational choice of the skidding methods.

The mechanism of soil erosion at different degrees was expounded,which was caused by different cutting methods,skidding methods,and cutover land cleaning methods in forest operation techniques.

Test research on materials compounding of massive concrete under special environments;

Making a start on research on raw materials of shotcrete,aiming to local environments of high temperature and high humidity in which shotcrete located the specimens were conserved and pressed by means of simulating test that it simulated local environments of high temperature and high humidity,and ultimately the materials compounding of shotcrete was determined.

By selecting the suitable local materials in Chongqing and testing the performance of the materials, and through trial mix and performance testing, this article utilizes the local materials to produce HSC and HPC.