Three common problems in the construction of the h

2022-09-27
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Pay special attention to the three common problems of waterproof coiled material construction

the three common problems of waterproof coiled material construction should be paid special attention during construction

May 6, 2019

analysis of three common problems in waterproof coiled material construction

waterproof coiled material construction is well known, but some problems are often ignored by everyone. Today we will analyze the three common problems in waterproof construction. What can be prevented should be avoided as far as possible. Oh ~ ~

leakage cause analysis:

(1) corners, coiled material joints and closing parts are paved tightly, welded and sealed. When pouring the main structure later, The coiled material is damaged here

(2) the inner and outer corners, corners and other coiled materials with large stress are coiled materials with reinforced layers added as required

(3) the selected coiled material has poor toughness and inconvenient operation at the corner. In order to ensure that the coiled material at the corner is paved with tight paint

(4) 50% and (9) 0% of the mechanical damage around the pipe belongs to fatigue damage and leakage, and the pipe surface is not carefully cleaned and derusted. There are dead corners around the pipe penetration, so that the coiled material is not suitable for paving

prevention and control measures and industrial cluster construction in Changzhou, Wuxi, Qingdao, Shenzhen and other places:

(1) the internal and external corners shall be made into arc shape, and the joints, craters, and closures shall be carefully operated and carefully inspected after the construction

(2) at the corner, the coiled material with additional reinforcement layer should be paved first and pasted tightly, and the coiled material with elongation and good toughness should be selected as far as possible

(3) the lap joint of coiled material shall not be left at the corner between the elevation and the plane, and the lap joint of coiled material shall be left on the plane, and the distance from the elevation shall not be less than 600mm

(4) the coiled material waterproof layer at the through wall pipe is paved tightly, and there are openings and warps. Zhejiang Liancheng Electronic Technology Co., Ltd. plans to invest in the construction of zahanour Industrial Park to process 300000 tons of aluminum alloy new material products (aluminum plate, aluminum strip, aluminum foil, aluminum forged hub and aluminum alloy new material) every year, resulting in leakage. The through wall pipe must be carefully derusted and dusted to keep the pipe clean, Ensure that the waterproof layer of coiled material is firmly bonded with the pipe. When plastering the leveling layer around the through wall pipe, the root of the pipe should be plastered into a fillet with a diameter of not less than 50mm, and the coiled material waterproof layer should be paved according to the corner requirements

cause analysis of hollowing:

(1) the base course is wet, the leveling is not dry, the moisture content is too large, and the connection is not firm, forming hollowing

(2) the surface is not carefully cleaned, and it is difficult to operate during facade paving and hot work, resulting in loose paving.

prevention measures:

(1) before the coiled material waterproof construction, the moisture content of the base course should be tested, and the construction can be carried out only after it meets the requirements

(2) when the groundwater level is high, the groundwater level should be reduced to 500mm below the cushion to prevent the moisture of the base course caused by the rise of capillary water

(3) before paving the coiled material waterproof, deal with the base course to make the coiled material paving dense, tight and firm

(4) the temperature should not be lower than 5 º C when paving coiled materials. The construction humidity of cementitious materials shall be ensured during construction

cause analysis of poor lap of coiled material:

(1) lap form and lap length of long and short sides do not meet the specification requirements

(2) the bonding of coiled material at the joint is not dense, and there are hollowing, mouth opening, edge warping and other phenomena

(3) the joint is damaged or even cannot be overlapped

prevention and control measures:

(1) measure and snap the reference line in advance according to the paving area and coil specification, and then pave according to the line; The overlapping form shall meet the specification requirements. The facade shall be paved from top to bottom, and the upper roll shall cover the lower roll by not less than 150mm. During plane paving, the lap length of the long and short sides of the coiled material shall not be less than 100mm, and the upper and lower layers of coiled material shall not be paved vertically to each other

(2) during construction, ensure that the groundwater level drops to 500mm below the cushion and remains until the construction of the waterproof layer is completed

(3) the joint shall be properly protected to avoid pollution and damage from the environment and cross processes. The street overlap shall be carefully constructed, fully coated with adhesive, and compacted with force. Finally, the seal shall be pasted and sealed with sealing material, and the width shall not be less than 20mm

(4) the temporary protective wall should be built with lime mortar to facilitate removal. The coiled material in the temporary protective wall should not be pasted with adhesive. The accessible help should be wrapped with protective isolation layer coiled material and buried in the temporary protective wall. During street construction. Remove the temporary protective wall and the coiled material of the protective wall isolation layer, and then lap the construction layer by layer according to the regulations

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