下人孔位于车辆顶部，主要起到设备检修及人孔放料的作用。

The manhole is located on the top of the vehicle and mainly serves for equipment maintenance and material discharge through the manhole.

一般情况下，车辆多采用和罐车连接的方式打料。

In general, vehicles are often connected to tank trucks for feeding.

但也有采用上部从人孔灌装物料的情况，如需要从上部人孔灌装物料，需要注意以下几点：

But there are also cases where materials are filled from the upper manhole. If it is necessary to fill materials from the upper manhole, the following points should be noted:

（1）、人孔打开后注意保存好螺栓，避免丢失

(1) After opening the manhole, pay attention to saving the bolts to avoid loss

（2）、多留意天气预报，如有雨，应提前将人孔密封螺栓重新紧固到位。如怕紧固不到位，可选择在人孔上方再包装一层防雨布。

(2) Pay more attention to the weather forecast, and in case of rain, tighten the manhole sealing bolts in place in advance. If you are afraid that the fastening may not be in place, you can choose to package an additional layer of rainproof cloth above the manhole.

（3）、雨后或长期人孔灌装施工，应多留意车厢内是否有物料板结情况，如发现存在物料板结情况，应及时清理。

(3) After rain or long-term manhole filling construction, attention should be paid to whether there is material compaction inside the carriage. If any material compaction is found, it should be cleaned up in a timely manner.

（4）、人孔经常性的打开，会造成盖处的密封胶条密封不到位或脱落，应及时检查更换。

(4) Frequent opening of the manhole can cause the sealing strip at the cover to not seal properly or fall off. It should be checked and replaced in a timely manner.

（5）、搅拌站物料存储罐内水泥长时间存储有可能会产生物料板结块，从人孔放料时一定要特别留意，同时不要敲击搅拌站物料存储罐体，如在装料的过程中发现有板结块掉落在车厢内，应立即停止加料，并将板结块取出。

(5) Long term storage of cement in the material storage tank of the mixing plant may result in the formation of biological material board clumps. Special attention must be paid when discharging from the manhole, and the material storage tank of the mixing plant should not be knocked. If any board clumps fall into the carriage during the loading process, feeding should be stopped immediately and the board clumps should be removed.

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