grouting of karst

例句：

1. 1. The engineer used grouting to reinforce the concrete beams.
   工程师使用灌浆加固混凝土梁。
2. 2. After the construction, we need to perform grouting operations to ensure the stability of the structure.
   施工完成后，我们需要进行灌浆操作以确保结构的稳定性。
3. 3. The grouting process is crucial for preventing water infiltration and maintaining structural integrity.
   灌浆过程对于防止水渗透和保持结构完整性至关重要。