2. The blind ditch drainage plugging method of the pool collecting well
When digging a biogas digester, if moderate groundwater appears on the pit wall and bottom, a sump can be dug at the bottom of the biogas digester first. The size and depth of sump should be suitable for submersible pump. The bottom of the sump is covered with stones with a thickness of 65,438+00 cm. Water is left in the pit wall to communicate with the gravel layer at the bottom of the pit. The sump wall can be poured with tile and brick formwork, and precast cement pipe or PVC pipe can be used as the sump wall if conditions permit. Then from the sump to the bottom of the pond, a cross-shaped blind ditch is opened, with a depth of 10 cm and a width of about 8 cm. The ditch is filled with stones, and the leakage water in the pit flows into the sump from the cross ditch and is discharged to the outside of the biogas digester by submersible pump or manually. Spread the plastic film on the cross-shaped ditch at the bottom of the biogas digester until the whole bottom and the wall of the biogas digester. After water leakage is isolated, cement concrete is poured at the bottom of the biogas digester to build the biogas digester. After the plastering and sealing procedures of biogas digester are completed, the sump at the bottom of biogas digester will be treated after the curing period.
To treat the sump at the bottom of the biogas digester, the aqueduct can be inserted into the gravel layer at the bottom of the sump first, and then the prepared sticky yellow mud mass is tightly filled in the sump around the aqueduct, and the depth is about 1/2 of the sump. Immediately, cement concrete mixed with water plugging agent or sodium silicate is poured into the sump, and the water flows from the aqueduct to the sump and is discharged out of the sump. After the cement sand ash to be blocked is initially set, the water in the aqueduct can flow into the biogas digester. 12~24 hours later, the cement concrete filled with the sump has solidified, and then the running water of the aqueduct is blocked. After the water in the biogas digester is pumped out, the nozzle of the aqueduct is 2~3 cm below the water surface of the collecting well, cotton and cloth are stuffed in the aqueduct, then cement mortar is stuffed, then dry logs are plugged in the aqueduct, and then the surface is plastered with cement mortar.
3, pool leakage drainage plugging method
If there is water leakage in the biogas digester that has been safely filled by the car, a hole can be made in the leaking place of the biogas digester, and a water pipe can be installed in the hole, so that all the water leaks out of the water pipe and is discharged from the biogas digester. After the construction of sealing layer of biogas digester is completed, the running water of aqueduct is treated. Rub a cloth strip into a "ball" ball, tightly plug it in the aqueduct, block the water, and then apply cement mortar to the mouth of the aqueduct.
4. Micro-drainage plugging method for tank body
After plastering the sealing layer of biogas digester, there is a small amount of water leakage in the biogas digester. Apply cement sand mortar (preferably mixed with water plugging agent or sodium silicate) to the leakage place, and immediately press it on the plastered cement sand ash with dry plant ash or quicklime and dry sand bag. When the water in the ash bag is wet, replace it with dry ash bag until the cement plastering layer solidifies and there is no water leakage.