A geotextile bag is a flexible three-dimensional structure made of a high-strength, durable geotextile fabric. It is hydraulically or mechanically filled with sand, mud, concrete and other materials to form an engineering structure with certain strength and stability. Geopipe bag has the advantages of easy construction, strong adaptability, environmental protection and economy, etc. It is widely used in the fields of coastal protection, river training, land reclamation, water conservancy project, etc.

Contrast

1.Traditional natural dewatering method of mud discharge site: 

this method disposes of river and reservoir bottom mud with simple technology and occupies more land. However, the efficiency of this dewatering method is very low, and there are also certain environmental and safety hazards. As the bottom mud in the dump is exposed and in direct contact with the surrounding environment, if the water treatment is not up to standard, it will cause secondary pollution to the surrounding water bodies.

2.Mechanical dewatering method: 

to deal with organic pollution and heavy metal pollution bottom mud, although the dewatering effect is good, but there is a one-time investment in equipment is high, the need to consume power energy, the construction of the workshop plant, the processing capacity can not meet the river reservoir bottom mud site treatment of the requirements of the short duration and so on shortcomings.

3. Advantages of geotechnical pipe bag dredging

Convenience: the diameter and length of geotechnical pipe bag can be adjusted according to the need, strong plasticity, and can be stacked, convenient transportation.

Environmental protection: fully enclosed construction, almost no noise, not easy to cause secondary pollution.

High efficiency: It can fully meet the treatment capacity of wastewater and sludge, and the treatment capacity can be increased and decreased according to the flow rate of the pump. Good reduction effect: the volume of sludge can be basically reduced by more than 90% in one month, which is easier for subsequent removal and treatment.

Wide application: large and small wastewater treatment projects and sludge dewatering projects can be used.

Construction method

The first step is filling, the use of high-strength and permeable geotextile fabric manufactured into the actual need of the bag body, and then filled with slurry into the bag body.

The second step is drainage, because of the composition of the bag body of geotextile fabric with small holes it can retain the solids in the slurry and can discharge the water in the slurry, so that can effectively reduce the volume of inclusions in the body of the bag, the bag body can be repeated filling, until the bag body to reach the allowable height of the material, and at the same time, the water can be discharged back to the use of the water.

The third step is solidification, after repeated filling and drainage, the bag body left in the fine particles of objects will be due to the drying effect will gradually solidify.

Technical Advantages

(1) Filter bag volume can be adjusted arbitrarily, with a wide range and flexible engineering treatment capacity;

(2) No dewatering machinery and equipment input, no electricity power configuration, no need to move;

(3) Small investment in filter bag system, minimal use of manpower, simple operation;

(4) The filter bag can be placed at any suitable place near the river and lake, and the drainage water can flow into the river and lake directly;

(5) The filter bags can be placed at multiple locations according to the operation of the dredging vessel, which is suitable for in-situ dewatering of silt;

(6) The silt is closed during the dewatering process to avoid secondary pollution;

(7) The water content of the silt in the bag can be adjusted according to the number of times the bag is filled, the pressure and the idle time;

(8) Adopting special filter cloth with good filtration performance, high strength and not easy to be aged;

(9) The formula of chemicals can be adjusted according to the condition of sludge to achieve harmless treatment of sludge;

(10) The silt after dewatering treatment can be used as slope protection soil of rivers and lakes or soil for agriculture and greening;

(11) The investment in system engineering is small, the operation cost is low, and the construction period is short.

Laying and fixing

Geotechnical pipe bag laying selection in the low tide level of the exposed beach artificial tide paving, paving should be removed before the range of blocks, debris and other objects that hinder the quality. 

Processed bags transported to the construction site, in accordance with the location of the laying, in order to prevent the pipe bag filling and irrigation when rolling slippage dislocation, to ensure that the position of the mud-filled bag is accurate, the pipe bag should be anchored after the completion of the laying of the anchor fixation. The bottom layer of pipe bag anchoring through the outside of the pipe bag laying anchoring steel pipe, and then use the pipe bag on the anchoring ring and steel pipe connection anchoring method, the bottom layer of geotechnical pipe bag filling is completed, the upper layer of geotechnical pipe bag using both sides of the pull ring and the bottom layer has been filled with geotechnical bag using geotechnical tape and the lower layer of pipe bag tied together as a whole anchoring method.