Construction technology and method of basement floor waterproofing project

Construction technology and method of basement floor waterproofing project

As a new waterproof material, MBP-P polymer self-adhesive membrane waterproofing membrane has the advantages of trampling resistance, pollution resistance, ultraviolet resistance, water immersion resistance, simple construction operation, short construction period and excellent waterproof performance. It can be widely used in industrial and civil basement floors and basement exterior walls poured after vertical excavation, open-cut tunnels and sunken pavement floors and exterior walls, subway station floors and exterior walls, and is safe and environmentally friendly. Let me analyze the construction technology and method of basement floor waterproofing project. Welcome to read and browse.

Project overview

Yangzhou Oriental International Hotel was invested and built by Yangzhou Asia-Pacific Real Estate Co., Ltd. and designed by Shanghai Huadu Architectural Planning and Design Co., Ltd., with a construction area of 277,000 square meters. It consists of a main building with four floors underground and 72 floors above ground, and corresponding supporting equipment rooms and skirt buildings. The basement of the podium is 0.8m thick, the main floor is 3.5m thick, and the top elevation is-17.1m. The design strength of floor concrete is C40, the impermeability grade is P8, the floor cushion adopts C 15 thick 100 concrete, and the basement floor waterproof adopts MBP-P pre-laid polymer self-adhesive waterproofing membrane.

Introduction of polymer self-adhesive waterproofing membrane

1 raw material composition:

Pre-laid polymer self-adhesive film (non-asphalt-based) MBP-P waterproofing membrane is composed of polymer sheet, polymer self-adhesive film and particle anti-adhesive layer.

Two characteristics:

2. 1, good waterproof performance: MBP-P pre-laid polymer self-adhesive waterproofing membrane is easy to lay, reliable to lap, and can be effectively bonded with concrete structure to form a composite+integrated waterproof system, giving full play to the self-waterproof function of concrete structure, ensuring waterproof effect, reducing leakage probability and meeting the requirements of the first-class waterproof fortification standard.

2.2. Good anti-trampling and anti-sediment pollution effect: MBP-P polymer self-adhesive membrane waterproofing membrane adopts high-strength plastic substrate, which can effectively prevent the waterproof layer from being damaged by trampling and sediment pollution by subsequent constructors after construction. The practice shows that the film particle anti-sticking layer can still be effectively integrated with post-cast structural concrete under the condition of a small amount of dust.

2.3. Strong ultraviolet resistance: For ordinary asphalt-based pre-laid waterproofing membrane, short-term sunlight irradiation will reduce the bonding force between the membrane and structural concrete, or even fail to bond; MBP-P polymer self-adhesive membrane waterproofing membrane contains no organic components, which can effectively resist the action of sunlight and ultraviolet rays, thus ensuring the bonding effect with concrete structures.

2.4. Strong water immersion resistance: In the basement, the waterproof layer will be immersed in underground water for a long time, while MBP-P polymer self-adhesive waterproofing membrane can still be effectively combined with concrete structure after being immersed in underground water for a long time because it does not contain migratory components such as plasticizers.

2.5, not affected by foundation settlement: the foundation of a building will generally have settlement phenomenon, even within the scope allowed by the design, which will adversely affect the traditional waterproof layer and cushion bonding, while MBP-P polymer self-adhesive membrane waterproofing membrane can be firmly combined with concrete structure and is not affected by foundation settlement.

2.6. Shorten the construction period and reduce the cost: MBP-P polymer self-adhesive membrane waterproofing membrane has low requirements on the base surface conditions, and the moisture content of the base surface has no influence on waterproofing workers, so there is no need for leveling layer, isolation layer and protective layer, which reduces the earthwork excavation, thus shortening the construction period and reducing the cost.

2.7. Safety and environmental protection: primer painting and open flame operation are not needed to avoid hazards, eliminate potential safety hazards and save resources.

Construction steps of MBP-P type pre-laid polymer self-adhesive waterproofing membrane

1, primary treatment

1. 1 The grass-roots unit has gone through the acceptance and handover procedures of the working face, and the surface of the grass-roots unit has been cleaned, basically flat, without obvious protruding parts.

1.2 waterproof treatment of pile head: coat cement-based permeable crystalline waterproof coating on the exposed top and side of pile head, and extend it to the structural floor cushion at150 mm. Within 300mm around the pile head, apply polymer cement waterproof mortar transition layer. The waterproof membrane of MBP-P polymer self-adhesive membrane structure layer should be spread on the transition layer of polymer cement waterproof mortar and extend to the pile side, and its joint with the side wall of pile head should be filled with sealing material. The filling of sealing material should be dense, continuous, full and firmly bonded. The root of reinforcement at the pile head shall adopt water-stop tape or water-stop glue that expands when meeting water.

2, the shop is stuck coil

First lay the first layer of coil according to the datum line, then lay the second layer of coil, and then lap the long and short sides of coil. When paving the coil, always pay attention to the alignment with the baseline to avoid the deviation that is difficult to correct.

3, coil lap

3. 1 Short-side lap: Short-side butt lap of coil, assisted by polymer self-adhesive tape, and properly heated if necessary.

3.2 Long-side lap: After removing the isolation film on the lap side of the coil, directly lap and roll.

Construction technology of MBP-P pre-laid polymer self-adhesive waterproofing membrane

1 construction preparation

1. 1 Check whether the site has paving conditions; Scaffolding requires perfection.

1.2 Check the specifications and models of incoming materials, and whether the packaging appearance is intact and damaged. It is forbidden to use damaged packaging materials.

1.3 Check whether the tools needed for paving are complete and in good condition.

1.4 According to the drawings and the actual situation, comprehensively consider the overall paving effect, and solve the contradiction in advance.

2 Primary treatment

2. 1 Basic maintenance meets the design and specification requirements. Before the construction of waterproof project, the quality of the project mentioned in the preceding paragraph shall be checked and accepted, and the construction can be started only after it is qualified.

2.2 All kinds of embedded pipe fittings shall be embedded in advance according to the design and specification requirements, and sealed.

2.3 The surface of the grass-roots level has been cleaned, basically flat, and there is no obvious prominent part.

2.4 the yin-yang angle of the base surface shall be painted as an arc, with the minimum radius of the yin angle of 50mm and the minimum radius of the yang angle of 20 mm. ..

2.5 There is no Mingshui on the construction time base. If there is water, the construction can only be started after the water is removed.

3 construction process

Cleaning the base of pile head, waterproofing, laying coiled materials, overlapping coiled materials, organizing acceptance, binding steel bars, pouring concrete, and subsequent structural layer construction.

4 matters needing attention in construction

4. The waterproof layer of1.MBP-p waterproofing membrane is constructed by cold working. After the materials enter the working face, open flames shall not be used in any form. If the welding of steel bars produces sparks, temporary protection measures should be set on the coil surface at the welding place.

4.2, coil laying is completed, should pay attention to the subsequent protection, reinforcing cage should be based on the principle of light put, can't drag on the waterproof layer, so as not to damage the waterproof layer.

4.3. The short-side joints of two adjacent rows of coiled materials should be staggered by more than 300mm to avoid overlapping of multi-layer joints and uneven pasting of coiled materials.

4.4. Necessary and eye-catching enclosure measures should be taken in the construction area (necessary passages should be set around), and irrelevant personnel are prohibited from walking and trampling.

4.5, in the process of binding steel bar, such as steel bar movement need to use a crowbar, should be temporarily protected on the mat board, in order to avoid damage.

4.6, in the process of subsequent construction of waterproof layer, such as accidentally destroyed the waterproof layer, will be repaired in time.

Quality control measures of MBP-P pre-laid polymer self-adhesive waterproofing membrane

1 During the vertical and horizontal transportation of steel bars, the principle of handling with care shall be observed, and temporary protective measures such as boards shall be taken at the lifting point of steel bars to prevent the steel bars from piercing the coil.

2 When binding steel bar, if the steel bar is heavy, if necessary, stick a waterproof coiled material under the concrete cushion block or horse stool steel bar to enhance it.

3 In the subsequent construction process of waterproof layer, if the waterproof layer is damaged carelessly, it should be reported to the waterproof construction unit in time for repair once found.

4. When welding floor steel bars, wooden boards or iron sheets should be used as temporary protective baffles on the welding operation surface, and water should be sprayed on the corresponding MBP-P waterproofing membrane to prevent welding slag from burning the membrane.

Safety control measures of MBP-P pre-laid polymer self-adhesive waterproofing membrane

1 Pre-job education: educate all construction workers about safety in production, and they can only go to work after passing the examination, and conduct safety technical disclosure before construction.

2 is it safe to use it correctly? Sambo? Safety helmet must be worn when entering the construction site; Safety protective railings and warning signs must be set at the entrance of the building.

3. Designate a special person to master meteorological information, make timely gale and rainstorm forecasts, and take corresponding technical measures to prevent accidents; It is forbidden to carry out outdoor construction under severe weather conditions such as typhoon and rainstorm.

4. Post-construction material cleaning: educate the construction personnel in a civilized way, so that whoever does it will clean the material and the site will be clean.

5. Control site noise: reduce the interference to the surrounding environment.

Acceptance results of MBP-P pre-laid polymer self-adhesive waterproofing membrane

1 Materials and main supporting materials must meet the design requirements and specifications.

2 coil waterproof layer and its deformation joints, embedded pipe fittings and other details must comply with the design requirements and construction norms.

3 The waterproof layer is forbidden to leak.

label

As a new waterproof material, MBP-P polymer self-adhesive membrane waterproofing membrane has the advantages of trampling resistance, pollution resistance, ultraviolet resistance, water immersion resistance, simple construction operation, short construction period and excellent waterproof performance. It can be widely used in industrial and civil basement floors and basement exterior walls poured after vertical excavation, open-cut tunnels and sunken pavement floors and exterior walls, subway station floors and exterior walls, and is safe and environmentally friendly.

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