Indoor air needs to be circulated. Ventilation works should be installed in the room to ensure smooth ventilation. At the same time, leakage prevention of ventilation equipment must be ensured in the process of installation. Because once the seal is not good, the effect of the whole project is also ordinary. Understand its leak plugging process below:

　　1、清算：肯定灌漿孔位置及間距。清算潔凈需求施工的區域，肅清外表析出物。

　　1. Liquidation: confirm the location and spacing of grouting holes. Clean up areas where clean construction is required and remove surface precipitates.

　　2、鉆孔：運用鉆孔工具沿孔洞周圍鉆泄壓孔，鉆孔須斜穿過主漏水孔。但不得將構造打穿。

　　2. Drilling: Use drilling tools to drill pressure relief holes around the holes, and the holes should be obliquely drilled through the main leakage holes. But the structure must not be broken through.

　　3、埋嘴：察看主漏水孔的壓力，水流不急壓力不大時可用快干堵漏劑埋注灌漿止水針頭。當構造到達一定的強度沒有滲漏時，其它泄水孔分別裝置收縮止水針頭，用內六角扳手擰緊。墻面慢滲也依次裝置收縮止水針頭。

　　3. Bury the mouth: Check the pressure of the main leak hole. When the water flow is not too fast and the pressure is not too high, the quick-drying plugging agent can be used to bury the grouting water stop needle. When the structure reaches a certain strength and there is no leakage, the other drain holes are respectively equipped with shrinkage water stop needles and tightened with an inner hexagonal wrench. The slow seepage of the wall is also sequentially arranged with shrinkage water stopping needles.

　　4、灌漿：運用高壓灌漿機試壓，向灌漿孔內灌注化學灌漿料。單孔逐一連續停止。當相鄰孔開端出漿后，堅持壓力即可中止本孔灌漿。待一切的孔都灌完后，回到先前的灌漿孔，再次灌漿。

　　4. Grouting: Using high-pressure grouting machine to test pressure, chemical grouting material is poured into the grouting hole. The single hole stops one by one. When the slurry is discharged from the opening of the adjacent hole, the local hole grouting can be stopped by insisting on the pressure. After all the holes have been filled, return to the previous grouting holes and grout again.

　　5、拆嘴：灌漿終了，確認不漏，即可去掉或敲掉外露的灌漿嘴。清算灌漿液。

　　5. Open mouth: When the grouting is finished, the exposed grouting mouth can be removed or knocked out. Liquidation grouting fluid.

　　6、補強：用密封劑對易滲漏部位停止封堵，用聚合物JS防水涂料。

　　6. Reinforcement: Sealant is used to stop the leaking parts and polymer JS waterproof coating is used.

　　通風工程中，特別要留意的是避免漏水，在施工過程中一定要認真看看，發現哪漏水及時修補。避免通風效果變差。

　　In ventilation engineering, special attention should be paid to avoid leakage. During the construction process, we must look carefully and find out which central leakage should be repaired in time. Avoid worsening ventilation.