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Is it necessary to leave the wall when civil air defense airtight casing is embedded

Time: 05-08 󰃯 Reading times: 580 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: When civil air defense airtight casing is embedded, it needs to go out of the wall. However, the casing of basement exterior wall should be waterproof casing, the casing of connecting pipe between water tank and water pump, structures with strict waterproof requirements and other important positions should be flexible waterproof casing, which is basically ordinary casing.

When the civil air defense airtight casing is embedded, it needs to go out of the wall, but the casing of the basement exterior wall should be Waterproof casing The casing of the connecting pipe between water tank and water pump, structures with strict waterproof requirements and other important positions shall be Flexible waterproof casing It is basically a common casing. If the wall passing through the wall is not concrete, it should be changed into concrete wall, and the casing must be condensed in the wall at one time.
During the main structure of civil air defense airtight casing, the problems are easy to appear: casing leakage, wrong reservation, inappropriate size of reserved hole; inaccurate embedded position of civil air defense airtight casing, axis and elevation inconsistent with drawings. As a result, the structure is chiseled in the pipeline construction process, which affects the construction quality.
(1) Before the construction of the project, professional drawings and building structure drawings should be checked, and the location and size should be carefully checked. Make clear the size of the drain outlet of sanitary ware, read and be familiar with the construction drawings carefully, carefully check the coordinates, specifications, sizes and quantities of "reserved and embedded" of various positions and specialties, and make written technical disclosure to the subcontractor. The drawings shall be mutually approved by the pipeline concentrated places and relevant specialties. The intersection and contradiction among the specialties shall be solved in the early stage.
(2) Before the reinforcement binding, the processing and preparation of the reserved air defense ventilation sealing sleeve should be done in advance, and the processing quality of the parts should meet the relevant professional specifications. For the "reservation and embedment" in the civil engineering drawings, the civil engineering personnel shall carry out the construction in strict accordance with the construction drawing and list after the reservation and embedding, and shall not be redundant or omitted.
According to the building standard design atlas 07fk02 installation of ventilation equipment in air defense basement, the detailed drawing of air duct passing through closed wall is shown. The embedded pipe (not called sleeve) can be divided into type I and type II, and the length of the embedded pipe is consistent with the thickness of the protective airtight wall.
If there is no wing ring on both sides of the connecting pipe, it can only be used for the pipe with flange ring on both sides.
Attention should be paid to the orientation of type II pipe when embedding, and the nozzle with wing ring for connecting pipe should be consistent with the nozzle orientation. In case of any mistake, type I tube can be used regardless of which end or both sides are connected.