异常情况处理措施异常情况指膜下真空度无法达到80 kPa，或已达到80

Handling measures for <br>abnormal conditions Abnormal conditions refer to the situation where the vacuum under the membrane cannot reach 80 kPa, or it has fallen after reaching 80 kPa but it is difficult to recover to 80 kPa. There are usually the following reasons: <br>(1) The seal groove leaks, which can go into the groove Irrigation can generally be solved. If it is not possible, mud or clay can be mixed in the water to increase the sealing effect. <br>(2) If the sealing film is damaged, visible small leaks will be repaired immediately. During the pumping process, a chirping sound will be made, and the leaks will be found to remedy. <br>(3) The efficiency of the jet pump is insufficient. Check whether the impeller of the pump is blocked by debris, whether the jet chamber and nozzle are damaged, and keep the jet chamber and the film outlet at the same plane. <br>(4) Leakage at the membrane outlet, re-bundling and sticking with plastic film, and covering with clay. <br>(5) If the sealing film is damaged after covering the water film, a large plastic film can be laid on the hole and covered with silt, and the sand bag is pressurized.

异常情况处理措施<br>异常情况指膜下真空度无法达到80 kPa，或已达到80 kPa 后降下来却很难恢复到80kPa的情况，通常有以下原因：<br>（1）密封沟漏气，可向沟内多灌水，一般来说是可以解决的，如还不行，则可在水中混入泥浆或粘土，加大密封效果。<br>（2）密封膜损坏大的可见的马上修补小的漏气处，在抽气过程中会发出鸣叫声，循声找到漏气处进行补救。<br>（3）射流泵功效不足，检查水泵叶轮是否有杂物堵塞，射流腔及喷嘴有无损坏，并保持射流腔和出膜口保持同一平面。<br>（4）出膜口漏气，采用塑料薄膜重新包扎和粘牢，并用粘土覆盖。<br>（5）如覆盖水膜后发现密封膜破坏，可在漏洞处铺设一块较大塑料薄膜并用淤泥盖住，加压砂包袋。

Handling measures for abnormal conditions<br>Abnormal condition refers to the condition that the vacuum degree under the membrane cannot reach 80 kPa, or it is difficult to recover to 80 kPa after it has reached 80 kPa, usually due to the following reasons:<br>(1) In general, it can be solved by filling more water into the sealing ditch for air leakage. If not, mud or clay can be mixed into the water to increase the sealing effect.<br>(2) If the sealing film is damaged greatly, repair the small air leakage immediately. During the process of air extraction, the sound will be emitted. Follow the sound to find the air leakage for remedy.<br>（3） The efficiency of the jet pump is insufficient. Check whether the impeller of the pump is blocked by sundries, whether the jet cavity and nozzle are damaged, and keep the jet cavity and the film outlet at the same plane.<br>(4) The air leakage at the film outlet shall be repacked and adhered with plastic film and covered with clay.<br>(5) If it is found that the sealing film is damaged after covering the water film, a large plastic film can be laid at the hole and covered with sludge, and the sand bag can be pressurized.