1.1 Construction Process
Before Fish Ponds dam liner is laid, the laying and welding floor plan for HDPE geomembrane should be drawn. The process is as follows: planning according to the actual terrain dimensions of the site; cutting and transporting the geomemes to corresponding locations; laying and welding according to the operating procedures; applying for acceptance after passing the self-inspection, and preparing for the next process.
Fish ponds dam liner
1.2 Principle of electric fusion welding
The electric melting principle is used to accurately control the temperature change. When the electric heating contract moves forward, the two axle wheels move forward together and press the two films together.
1.2.2 Operation points of fusion welding
After starting the machine, carefully observe the temperature rising condition shown by the indicator instrument, so that the equipment is fully preheated to about 190℃. When inserting the film into the welder, the lap size should be prepared and the action should be rapid. During the welding, the welding personnel should pay close attention to the condition of the weld, and timely adjust the special faults. They should stop the machine in time to avoid damaging the Fish Ponds Dam liner. The auxiliary personnel must also monitor whether the power supply voltage of the welding machine is within (220±11) V at all times, otherwise, the machine should be stopped for maintenance immediately.
2.Construction method of special parts
Due to the characteristics of large volume, large quantity, deep foundation, and complex underground pipe network, the laying of Fish Ponds Dam liner was very difficult. For special parts, corresponding treatment measures should be taken according to local conditions.
2.1 Treatment of slope foot of canal slope
At the intersection of foot, corner and bottom slope of canal slope, the foundation should be smooth and smooth when turning, and negative slope should not appear. Lay down your Fish Dam liner as gently as possible, so that the Fish Dam liner does not hover.
The construction points of this situation: in the corner and other irregular range of position, should be cut into the width of the small “inverted trapezoid”, from the width of the narrow proportion by the operator according to the actual situation of the site and the specific size of the slope calculation. If the proportion is not correct, it will lead to “bulge” or “suspension” of the film surface on the slope.
