Concrete plaster wall specification and specification can be characterized by optimal impermeability, proper performance, value in areas where groundwater level is high, use of them in damaged damaged soil and gravel dams and their shape. . The use of these walls in controlling leakage under dams, creating a sealing wall around a site and drainage water from the ground for the construction of the structure, preventing the spread of contaminated material in groundwater, around a site as a suitable dampening agent Mechanical vibrations are a project like a power plant. Their main application is as the walls of the seals under the dams.
Sealing the sealing wall to the impervious to the structure and the substrate
The sealing wall must be connected to an impermeable layer (or with low permeability).
Connect in depth
Bentonite slurry or cement slurry around the joints is used to connect the wall to the substrate. This injection is carried out by drilling boreholes or by using pre-installed pipes in the concrete itself. But often due to the continuity of the concrete, the above pipes are avoided and injected through the insertion of freshly sealed pipes into the fresh concrete.
Connection at the top of the wall
The proper connection between the wall of the seal and the elements of the self-supporting structure is very important. It is like the core of the dams. Another method is the connection at the top of the wall, which has a small application, the removal of the walls of the guide and the plastic concrete materials inside it, and filling the above empty spaces with the layer The clay is compressed and the core of the dam is on these layers. This method is useful when during the operation the guide walls are broken, deviations from the original location or destroyed.
Platform Preparation
Substructure of the platform site is designed according to the type of ground structure and how the sealing wall is connected to the impermeable layer and the water level at the workplace.
If the seating area of the sealing wall is predicted to be impermeable to the surface of the water level, and the height of the sealing wall at the joining site is not less than 2.5 m (1.5 m in the clamping area of the platform and 1 m inside the guide) due to the materials The bottom of the river is not required under certain construction or consolidation, provided that the adhesion and continuity of the materials is provided. In practice, due to the scouring of finely grooved materials at the river level and the lack of land sustainability, it is suggested that the existing materials at the river level be mixed with at least 60 kg of cement per cubic meter, and in a strip of wall length of at least 3 m and a depth of at least 1 m in Place on-site.
If the seating area of the sealing wall is predicted to be impermeable to the underlying surface of the water level and the height of the wall is not less than 3 meters (2 meters inside the clay or plastic concrete enclosure and 1 meter inside the gidwall, where the upper guideline is the minimum 1.5 m above the level of the water level), while the location of the work, taking into account the water deviation and the type of land and the permeability, allow for the possibility of excavation and drainage, the site is mined to a depth of 1.5 m and excavation with clay mortar At least 6 meters in height on the floor and 8 meters in the finished surface (0.5 meters above the level of water level). In practice, due to the flushing of the surface of the river’s materials and the level of water deviation, the operation of the aforementioned is accompanied by abrasion, and it is suggested that the wall of the sealing water be at a depth of 2 m and a minimum width of 4 m in 6 m lengths after the drainage of the water Fill with plastic concrete.
Guide walls
After creating the required substructure at the site of the sealing wall, the guide walls are used as reinforced concrete to stabilize the leveling surface. The minimum reinforcement necessary for the construction of the gidwall is designed for the efficiency of the drilling and the use of the structure after the completion of the work. Both wall types can be built in place or prefabricated, seamlessly or in pairs. Gaidal height is at least 0.8 meters and maximum 1.5 meters. The thickness of the wall in each part of the shape of L is at least 50 cm, and the heel of the wall will be at least 130 cm in relation to the wall’s height. The distance between the Guidwall walls is proportional to the shape and size of the digging device, which is affected by the thickness of the seal wall. From 5 to 10 cm, the thickness of the walls of the guides is comparable to the thickness of the digging machine, in order to execute its movement within the walls of the guillotine.
Major Advantages of Guidaval
Advantages of guides can be used as guiding tools for grinding, protecting trench walls when smearing destructive impacts of drilling machines, slurry or concrete passageways, preventing slurry infiltration into highly permeable layers upstream, preventing Soil loss due to the blows of the digger and the difference in surface levels compared to groundwater.
