Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.

建立了桥面裂缝之上防水层张力的计算模型，有效地计算出桥面混凝土一定宽度裂缝上防水层须具备的最小延伸率和拉伸强度。

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Based on the test results, the calculation formulas of the width in cistern structure are proposed, and the detailing requirements of short bars are advanced in order to control the crack width.

以试验结果为基础，提出了水池结构中裂缝宽度的计算公式及控制裂缝宽度的短钢筋的构造要求。

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This paper discussed the calculation analysis of the secondary lining crack width and spacing by using simulating soil curved beam's stress.

根据乌鞘岭隧道岭脊地段地质状况和二次衬砌实际受力特点，采用拟地基曲梁计算法来分析二次衬砌的裂缝宽度与间距。

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