Adopt double layer preformed joint method to prevent anomaly shrinkage crack on asphalt pavement;

Based on a study and analysis of the effect of linear shaped charge, the paper sets forth the new method and the mechanism on presplitting cutting slots by linear shaped charge, pointing out the potential prospects of its development.

Through the engineering design practice, the article introduces the design and construction scheme to use the pre-cut seam of the cement steady grit stratum combined with the glass fiber grid for preventing the reflected crack of the asphalt concrete pavement, and sums up its practical treatment result.

[Methods] 24 New Zealand rabbits were randomly divided into A group (single-layer anastomosis group, 12 rabbits) and B group (two-layer anastomosis, 12 rabbits), which were evenly matched according to sex, weight.

Through the comparison of the traditional cutting process usually used in construction industry with the advanced cutting process with punching process for section bars,the feasibility of the double-layer punching process of section bars are adopted double were analyzed,then the corresponding die structure was presented,which could provide a economic reference for the punching of similar parts.