This article introduced the variable cross section liner dolly design to solve the tapered long-span lining construction of JiaHua-DaPing tunnel in ChongQing.

本文介绍变断面衬砌台车设计，用以解决重庆嘉华大坪隧道变断面大跨度衬砌施工。

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During the drivage of main-gate in long-wall face with fully mechanized caving mining, the gate is hard to support due to its loose and broken roof, large cross-section and long span.

在综采放顶煤工作面顺槽掘进过程中，由于顺槽煤层顶板松动破碎，并且顺槽采用矩形断面，顶板跨距较大，不利于巷道支护。

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In addition, the plastic ultimate strength of cross section and some proposals concerning the ultimate strength design of long span PPC continuous box girder...

此外，还对截面塑性极限强度问题进行了探讨，提出了大跨ppc变截面连续梁极限强度设计的建议。

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