文章最后给出了此桥腹板斜裂缝修复措施。并提出了纵向项板预应力柬配柬的建议。
The Suggestions for the repair of slab cracks and the design of prestressing tendon are also given.
在垂直应力不变，不断改变水平应力的条件下，分析各类软硬岩互层项板的应力、变形、破坏规律。
Studying the variety laws of the plastic failure, distortion and stress of soft and hard rocks alternate-layered roof with the constant vertical stress only the horizontal stress changing.
上向孔侧向崩矿爆炸应力波对采场项板的破坏比水平落矿爆炸应力波对采场顶板的破坏要小，从而使撬毛工作量减少了58.3％。
The destroy of the roof produced by stress wave of upward hole side blasting is less than that of the level hole blasting. The work of prizing flexible rock decreased by 58. 3%.
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