On the mechanical analysis of cracks on side walls in open-cut metro station and its control measures

Combined with the specific projects practices,it introduces the no-seam construction technology of over length concrete structure,represents the integral technology of setting the expand late poured band to strength the concrete moisture retention,maintenance and structure,so to the no-seam construction in motherboard pf underground and the side walls.

The paper studied the hydraulic characteristics of the side wall aerator by using the numerical simulation.

Analysis on the cracks of sidewall in the cavity of human prevented project of Weihe river tunnel and the management;

Hydraulic characteristics along the sidewall of a sluice downstream of a sudden lateral enlargement and vertical drop;

Experimental study on air entrainment to alleviate cavitations for downstream sidewalls of ogee-section in spillway tunnel;

Combining with the practical examples,the paper illustrates the general construction sequence of the PBA technique,gives a general survey on the single-side wall support system,and summarizes the single-wall construction.

Discussed are the performance, structure, main technical parameters, test results and typical freight loading of 70 t box cars with movable side walls.

Described are the features, development process, main structure, new technologies applied and the testing of the box cars with movable side walls.

The necessity to develop the 120 km/hfast box cars with movable side walls in our country is analyzed.