本文通过对裂缝修补机理和修补时机的分析，得出了裂缝修补时对裂缝的开槽槽壁和灌缝材料的要求以及最佳的灌缝时间。
According to analyze cracks repair mechanism and repair time, obtain the request of the cracks slot wall and patching material when crack patching and the best patching time.
在施工中采用了钢管桩、高压防渗板墙、槽内降水、槽外注水回灌，外加复合土钉墙支护措施，保证了基坑开挖。
In construction, supporting measures such as steel pipe pile, high-pressure impervious board wall were adopted, ensuring the excavation of base pits.
结果表明：与直接粘贴CFRP布相比，采用剔槽植入钢筋置换混凝土灌胶再粘贴CFRP布复合加固方案加固的梁极限承载力有显著提高，开裂荷载及延性有较大提高；
Results show that ultimate bearing capacity of RC beam strengthened by composite CFRP sheets is much higher than that of direct pasting CFRP. Cracking load and ductility are improved higher too.
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