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For the high and low span type, a piece of stone is used to cover the low span parapet and the expansion part, with water diversion on one side
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This example shares the high-quality practices of outdoor expansion and contraction joint construction of public construction project of Tianjin Tianyi construction group, especially the construction scheme, which is worthy of reference
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Three layers of roof waterproof and three layers of expansion deformation; 3
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This method can make the stone panel and the high span wall settle at the same time without any relationship with the low span parapet, It will not crack the stone due to settlement, so as to play the role of anti deformation
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Roof expansion joint is the key part of water leakage, and three courses of waterproof shall be done: waterproof cloth shall be pasted at the bottom layer, aluminum alloy waterproof and guide channel shall be made at the middle layer, and stone panel waterproof shall be made at the surface layer
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The Ministry of housing and urban rural development informed that the person in charge of construction, construction and supervision projects is the first person responsible for epidemic prevention and control of engineering projects! 4
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The above two problems are solved
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The expansion joints with scattered distribution, large quantities and different shapes bring great difficulty to the outdoor anti-seepage problem
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The provincial emergency notice: once this kind of situation is found, stop work immediately and close the site! All construction personnel shall be vaccinated before August 15! Click “watching” to let your friends know.
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After the project department has defined the construction scheme, it strictly controls the process during the implementation, gives priority to the model, defines the materials and construction quality standards, implements the disclosure before construction, implements the construction quality responsibility system, specially assigned personnel are responsible for dynamic tracking, and implements the process inspection and acceptance system, so as to ensure the implementation of the construction scheme
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High quality projects will bring people a pleasant feeling
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The project is divided into many areas, and expansion joints are used to connect areas and sections
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Combined with ③ water diversion design, the water leakage problem will be fundamentally solved in theory
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For the contour type, two stones are used to cover the parapet respectively, the water is divided on both sides, a 1cm gap is reserved in the middle, and the joint is sealed with silicone weather resistant glue to play the role of expansion and contraction
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The stone panel is rigidly connected with the wall of the high span part by steel framework
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Deformation design of exterior wall and deformation resistance design of roof expansion joint are designed according to three waterproof layers: first, the bottom waterproof cloth is pasted, which has expansion performance because it is a flexible material and has sufficient scalability
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Strictly control the material standard first and strengthen the process control and monitoring
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The aluminum alloy guide flume has telescopic capacity
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At the same time, the roof is connected with the waterproof layer of the outer wall
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Figure ① – ground floor Figure ② – middle layer Figure ③ – anti deformation design of surface layer 2 anti deformation design shall be carried out at the same time as the waterproof design of expansion joint, that is, the construction measures to resist the tension crack of expansion joint caused by uneven settlement of main body, resulting in water leakage
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Two layers of waterproof and two layers of expansion deformation on the facade of the outer wall; 2
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Wonderful review of previous periods 1
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Firstly, starting from the expansion joint of the facade of the outer wall, the internal sliding support is selected to resist deformation and tension
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The roof is connected with the waterproof layer of the facade of the outer wall to guide and discharge water
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Thirdly, the surface stone panel is divided into equal height type and high-low span type according to different parapets
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The director must have a bachelor’s degree or above! More clear 2
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The waterproof design starts from the waterproof design of expansion joint: there is no ponding on the facade of the external wall, so two courses of waterproof are adopted: the waterproof cloth is pasted inside and the waterproof panel is buckled outside
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At the same time, the stone panel is pressed into the bottom of the face brick of the high span external wall for 2cm, and the internal corner is sealed with weather resistant glue
Through the control of the construction quality of outdoor extension and contraction joints, the project not only eliminates the common problem of leakage, but also greatly improves the sensory quality of appearance
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18 site managers confirmed that the first patient was newly recruited to China Construction Third Engineering Bureau on July 28
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According to the current situation investigation, the key to water leakage lies in ① waterproof design and ② anti deformation design of expansion joints
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Emergency! 56 people were infected at a construction site in Wuhan, the epidemic spilled out in 4 places, and the person in charge of the subcontractor was detained! The Ministry of housing and urban rural development issued an important notice! 3
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The rainwater once flowing into the expansion joint of the roof is led out of the roof through two aluminum alloy guide flumes and the bottom waterproof cloth, and led out of the room along the waterproof layer of the outer wall, further improving the waterproof effect of the outdoor expansion joint
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The flexible waterproof cloth has expansion capacity
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To sum up, the anti-seepage design scheme of outdoor expansion joint is summarized as follows: 1
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The project department starts with the two most common problems of improper waterproof measures and leakage of expansion joints, and designs a feasible construction scheme
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The specific method is to fix both sides of the expansion joint with profiles with chute to install the movable sliding support in the middle
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Secondly, two aluminum alloy guide flumes are fixed on both sides of the parapet top, and the middle is of folding groove type, so there is expansion capacity and has expansion deformation capacity
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Source: Luban alliance of Construction Engineering in construction engineering, the leakage of outdoor expansion joints accounts for a high proportion of common problems in outdoor leakage quality, and once the leakage is difficult to deal with, the construction quality control of outdoor expansion joints must be strengthened in the construction process, and strive to achieve no leakage
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List of outdoor expansion joints due to various styles of outdoor expansion joints, it is necessary to review the drawings in detail, select the atlas according to the drawing design requirements, carefully study the suitability of atlas selection, prepare the preliminary construction scheme in combination with the actual situation, clarify the methods of each part, and then conduct the next in-depth research
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The expansion joint of water guide design is designed with waterproof and deformation resistance
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The panel is not rigidly connected and fixed with both ends of the wall, but connected with the movable sliding support, so as to ensure both waterproof and the influence of deformation at both ends of the expansion joint
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