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Reasons for improper installation of flexible casing pipe

Time: 03-31 󰃯 Reading times: 890 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: 1. The underground flexible waterproof casing must be compacted in the central soil or excavated the design elevation of the pipe bottom, and the parts along the pipeline pavement shall be cleaned up. The pipe hole has been reserved at the place where the flexible waterproof casing passes through the wall, and the hole size and casing specification shall conform to, coordinate and elevation

1. Underground flexibility Waterproof casing When paving, it is necessary to compact the backfill soil in the center of the house or excavate the design elevation of the pipe bottom, and clean up the parts along the pipeline pavement, Flexible waterproof casing The pipe hole has been reserved to install casing at the wall, and the hole size and casing specification are in line with the requirements, and the coordinates and elevation are correct.
2. The installation of flexible waterproof sleeve shall be carried out before the trench cover is covered or the chandelier is not closed, and the steel support frame shall be installed and meet the requirements.
3. The installation of concealed support and suspended pipe must be carried out after the construction of cast-in-place slab of the installation layer. The formwork and its dirt along the pipeline installation position shall be cleaned up, the elevator parts shall be firmly installed and the parts shall be appropriate.
4. Riser installation should be carried out after the main works. After the main works of multi-storey buildings meet the installation standards, they should be properly inserted and developed. Each layer shall have established design elevation line, and flexible waterproof casing shall be installed. The formwork and dirt in the shaft shall be cleaned up and fall prevention measures shall be taken. The installation of risers shall be carried out at the end of wall building and before wall decoration (including concealed riser).
The specification of flexible waterproof casing should conform to the relative technical standards; if the space between them is very small, it is very difficult to insert it into the required deep layer because of the great friction resistance after brushing the adhesive. Sometimes, it is difficult to push the pipe with a large specification when it is inserted to half. At this time, it is not timely to enter and exit. Under such conditions, it will be difficult to insert into the required deep layer The following categories will appear:
1. Although it is not inserted in time, it can be used as a temporary measure. As a result, the water seepage is caused by dislocation during the shallow water pressure test.
2. Smash the plank with a sledgehammer Although it can be inserted into the required deep layer, the method is not proper, especially in high temperature weather, the bonding agent solidifies quickly after brushing, and it still needs to be forced to insert by external force when the bonding surface is dry. As a result, the compressive strength of the adhesive is reduced and there is a potential safety hazard for all normal operation of the pipeline. The transition between flexible waterproof sleeve and pipe is too large, and the gap can be made up with adhesive He is afraid of scientific research. The experienced construction team should use flexible waterproof casing before bonding, and try to insert the pipe once. Under all normal conditions, when 1 / 2 or 1 / 3 of the deep layer is required, the matching clearance is ideal. The flexible waterproof sleeve and the suitable fit clearance of the pipe material are the premise to ensure the bonding effect.