Underground waterproofing project is a comprehensive and practical engineering technology. It has high requirements and is difficult. It is an important part of the construction project and occupies a very important position in the construction project. So what are the requirements for underground waterproofing construction? Look down. Underground waterproofing works basic construction requirements First, the preparation 1. Review the drawings before construction to understand the waterproof details and technical requirements in the construction drawings of the underground works, and prepare the construction plans or technical measures for the underground waterproofing works. 2. The construction of underground waterproofing works should be carried out according to various procedures. After passing the inspection, the next step of construction can be carried out. 3. The waterproof material used should have a factory qualification certificate and a waterproof material use certificate issued by the Beijing Construction Committee. The material must meet the design requirements. Waterproof material enters the scene, should carry on the scene sampling reexamination according to the stipulation, after the reexamination qualified can use. 4. The underground waterproofing project must be constructed by a waterproof professional team. The technical responsible person and the team leader must hold the waterproof construction personnel's certificate issued by the Municipal Construction Committee. 5. The use of this recommended practice must comply with the state's current safety fire protection and environmental protection regulations. Second, the operating conditions 1. The base level 15-20mm thick 1:3 cement mortar screed should have sufficient strength. The screeding layer should be flattened by calendering, solid, firm, and free of sand, and it must not have irregularities, looseness, bulges, cracks, and pockmarks. The flatness shall be checked with a 2m length ruler. The gap between the leveling layer and the ruler shall not exceed 5mm. 2. The surface of the screed must be clean and dry with a moisture content of no more than 9%. 3. At the intersection of the floor leveling layer and the vertical wall, the yin and yang angles at the intersection of the leveling layer and the sump, pit, etc. shall be rounded. The radius of the arc should be selected according to the type of coiled material according to Table 2. 4. The slope of the screed should meet the requirements of the design and related regulations, and no local accumulation of water is allowed. Third, pay attention to matters 1. The construction materials and auxiliary materials are mostly flammable materials. The warehouse and construction site for storage materials must comply with the relevant national fire protection regulations. The use of xylene and other solvents should have appropriate anti-virus measures. 2. The operator must wear a safety helmet when working on underground waterproofing works. 3. Polymer modified bituminous waterproof membrane hot-melt construction environment temperature of not less than -10oC; synthetic polymer waterproof membrane on-site construction of not less than -5oC; synthetic polymer waterproof coating is generally not suitable for winter construction, if indeed urgently needed During construction, the ambient temperature should be greater than 0oC. Rain, snow, and five winds are not allowed to be constructed. 4. Pay attention to finished product protection. Waterproof construction must be coordinated with relevant process operations, and the waterproof professional team and relevant construction operators should jointly protect the waterproof layer from damage. Do not wear waterproof shoes with spiked shoes. 5. Labor organizations can adjust according to changes in the construction work surface, generally 5-8 people per group. Underground waterproofing works should follow the principle of “combination of prevention, drainage, interception, and blocking, and adaptation to local conditions and comprehensive managementâ€. The use of polymer modified bitumen waterproofing membranes, synthetic polymer waterproof membranes, synthetic polymer waterproof coatings, UEA compensated shrink waterproof concrete and other new materials and new technologies were promoted in the selection of materials. In the construction, new techniques such as cold-bonding, hot-melting, and adding water-repellent concrete should be adopted to improve the quality of the underground waterproofing project, prevent engineering leakage, and promote the continuous development of waterproof technology. The above is a brief introduction for Xiaobian. If you want to know more related information, please continue to pay attention to Qijia Consulting. More exciting consultation, please stay tuned. Toilet waterproof construction construction installation decoration construction knowledge construction delivery construction contract
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