CN114960978A - Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure - Google Patents
Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure Download PDFInfo
- Publication number
- CN114960978A CN114960978A CN202210470173.4A CN202210470173A CN114960978A CN 114960978 A CN114960978 A CN 114960978A CN 202210470173 A CN202210470173 A CN 202210470173A CN 114960978 A CN114960978 A CN 114960978A
- Authority
- CN
- China
- Prior art keywords
- concrete
- water
- construction
- water stop
- waterproof
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000010276 construction Methods 0.000 claims abstract description 64
- 239000000853 adhesive Substances 0.000 claims abstract description 42
- 230000001070 adhesive effect Effects 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 40
- 239000003292 glue Substances 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000004140 cleaning Methods 0.000 claims abstract description 28
- 229920001971 elastomer Polymers 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 75
- 239000000463 material Substances 0.000 claims description 32
- 238000013461 design Methods 0.000 claims description 17
- 239000006260 foam Substances 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 12
- 239000011381 foam concrete Substances 0.000 claims description 12
- 238000009415 formwork Methods 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 10
- 239000012779 reinforcing material Substances 0.000 claims description 9
- 239000000084 colloidal system Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 6
- 239000004088 foaming agent Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003566 sealing material Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003337 fertilizer Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 238000000053 physical method Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 abstract description 4
- 238000007429 general method Methods 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
Abstract
The invention relates to a waterproof method for splicing and connecting joints of new and old concrete without a reserved embedded structure in an extension structure, which comprises the following steps of 1, cleaning a base layer, 2, slotting; step 3, embedding a rubber waterstop; step 4, coating water-swelling water-stop glue; step 5, binding steel bars, erecting a wall template, and pouring concrete; and 6, performing waterproof construction on the side wall. Compared with a general method for reserving a sedimentation post-cast strip, the method provided by the invention can reduce the trouble that the post-cast strip post-construction treatment node is not in place, the old structural wall body is made into a concave shape, and the water-swelling water-stopping adhesive is arranged at the corner point to form a plurality of water-stopping points, thereby reducing the hidden trouble of leakage of the outer wall and having good waterproof effect. The flexible rubber water stop belt is arranged in the middle of the old structure, so that the phenomena that the wall body is pulled to crack and leak and the like due to natural settlement of the new structure in the future can be prevented.
Description
Technical Field
The invention relates to the technical field of reconstruction and extension operations of buildings, in particular to a waterproof method for splicing and connecting old and new concrete without a reserved embedded structure in a reconstruction and extension structure.
Background
Along with the rapid advance of urbanization in China, the new reconstruction and expansion amount of buildings is continuously increased, the expansion and the communication of basements are common in some common reconstruction projects, but the treatment of leakage prevention at the joints of new and old concrete walls is a key problem.
Although a great deal of records have been made on the current waterproof method for concrete joints, in spite of the current waterproof methods, some technical requirements for the existing buildings generally exist, however, in reality, only a few buildings reserve structural measures for future extension work, and therefore, when the current common waterproof method is applied to the building extension work, the actual waterproof effect often cannot reach the design expectation.
Disclosure of Invention
The invention aims to overcome the defects and provides a waterproof method for a concrete abutted seam without a reserved embedded structure in a reconstruction and extension structure.
In order to achieve the above object, the present invention is realized by:
a waterproof method for a concrete abutted seam without a reserved embedded structure in a reconstruction and extension structure comprises the following steps
Step 1, cleaning a base layer: removing and cleaning the steel bar protrusion and the mortar lump on the surface of the old structure base layer; cleaning and protecting the concave parts at the two sides of the flange of the wall body to prevent collision damage, painting antirust paint on the steel bars at the reserved notch of the original wall body,
step 2, grooving: cutting off partial concrete in the middle of the old structure by a cutter in an annular manner, forming a notch with the width of 10cm and the depth of 15cm, and cleaning the notch by using a dust absorption blower and a blower;
step 3, embedding a rubber waterstop:
1) and cleaning a base layer: in the construction process, the old structural concrete has a plurality of sharp-angled stones and sharp reinforcing steel bars, so when the water stop is positioned, attention should be paid to puncture the rubber water stop due to overlarge force, and timely repair should be carried out when a crack phenomenon is found,
2) and inlaying a water stop: when the rubber water stop is embedded and positioned, the rubber water stop is kept flat at the interface part, and the water stop cannot roll and kink, and if the phenomenon of untwisted and unfoldable kinks is found, the adjustment should be carried out in time;
3) and fixing the water stop belt: when the water stop is fixed, a hole is punched on the allowable part of the water stop, so that the part of the body cannot be damaged,
4) embedding and sealing material: after the water stop belt is fixed, in order to prevent the water stop belt from deviating, the groove is filled with polyurethane two-component sealant so as to prevent the water stop belt from being shortened on one side and affecting the water stop effect;
5) and quality inspection and acceptance: the water stop belt joint is ensured to be well bonded, and the overlapping mode without any treatment is avoided;
6) and pouring concrete: the concrete must be fully vibrated when being tamped so as to prevent the water stop belt and the concrete from being combined badly to influence the water stop effect;
step 4, coating water-swelling water-stop glue: the single-component polyurethane water-swelling water-stop glue annular periphery is injected at the internal corner of the old structure, and after the glue is solidified, a film is well protected on the surface to prevent the glue from being damaged and polluted before concrete pouring;
1) basal plane treatment
Firstly, the base surface must be firm, the surface must not have oil stain, honeycomb, peeling and sanding phenomena, otherwise, the surface must be removed;
secondly, pre-positioning the base surface by adopting a snapping line mode before construction, wherein the positioning deviation is less than or equal to 10mm, and the distance from the base surface to the outer surface of the concrete is more than or equal to 100 mm;
2) adhesive water-stopping glue
The volume of each water-swelling water-stop glue is 320ml, and the extrusion lengths under different extrusion sections are as follows:
secondly, extruding the water-stopping adhesive by using a special adhesive injector, wherein the extrusion width and the extrusion height meet the design requirements, and the extrusion is continuous, uniform, full and free of bubbles or holes;
thirdly, construction in rainy and snowy days is avoided;
fourthly, when the water-stopping adhesive is matched with other waterproof technologies for use, the water-stopping adhesive is applied after other waterproof measures are shaped;
cutting off the water stop glue once the water stop glue has a damaged part or a part expanded in advance, and sticking the water stop glue again on the cut-off part, wherein the lap joint length of the new water stop glue and the old water stop glue is not less than 20mm, the lap joint part is firmly and tightly stuck, and no gap is left at the lap joint part;
3) curing and solidifying
The construction environment temperature is selected from 5 ℃ to 40 ℃. Below 5 ℃, the hardening time can be prolonged under the influence of humidity; the sag is increased above 40 ℃, and the environmental temperature is not lower than-10 ℃ or higher than 50 ℃ during construction;
secondly, the water-stopping adhesive reacts with moisture and humidity in the air and hardens, and the concrete can be continuously poured next time after the surface of the water-stopping adhesive is hardened and completely reaches the touch drying;
4) protection of finished products
Firstly, necessary measures are needed to protect the water-stopping adhesive when binding and welding the reinforcing steel bars near the water-stopping adhesive. Particularly, when the steel bar is welded, the surface of the water-stopping glue is covered with materials such as asbestos cloth and the like;
secondly, the exposed part of the waterproof adhesive is suitable for temporary covering protection;
thirdly, when the period from the construction of the water-stop adhesive to the second concrete pouring is longer, attention is paid to the fact that the protective adhesive body is not soaked, the soaking can cause water expansion to peel off the adhesive body, and the adhesive body needs to be repaired before the concrete is poured; the repairing method is to fix the colloid at the stripping part by a nail; removing accumulated water, removing the stripped colloid, and performing construction again;
step 4, binding steel bars, erecting a wall template, and pouring concrete;
1) and cleaning a base layer: stretching out the reserved steel bars from the old structural wall body, straightening and straightening, and cleaning up the surface sundries
2) And steel bar binding: 2-4 vertical ribs are arranged at the joint of the new structure and the old structure, horizontal rib grading marks are divided, then two horizontal ribs are bound with the lower part and the chest alignment part to fix the positions, the grading marks are divided on the horizontal ribs, the rest vertical ribs are bound, and finally the rest horizontal ribs are bound, and the horizontal ribs at the joint of the new structure and the old structure are in welded lap joint;
3) and installing a template: the method comprises the following steps that a completely black formwork is selected as a formwork, a square steel and steel pipe mode is selected as a back ridge, a three-section type water stop screw is selected to reduce leakage nodes, the contact surface of the clearance between the formwork and a steel bar protection layer is 5cm wide and 3cm deep and is half a strip, and waterproof treatment is strengthened at the position after the formwork is removed;
4) and pouring concrete
Firstly, the material requirement is as follows:
1.1, adopting high-grade low-heat cement concrete with micro-expansibility to enable the elastic modulus of newly poured concrete to be close to that of old concrete, generating certain pre-stress on a joint surface of the new concrete and the old concrete in a construction period, and generating certain compensation effect on later tensile stress;
1.2, the concrete mix proportion design and the concrete construction should ensure the ultimate tensile value or tensile strength, construction uniformity index and strength guarantee rate which are necessary for the concrete design, and the concrete crack resistance is improved in the construction;
secondly, interface processing: before concrete is poured and a warehouse is opened, cement mortar with the thickness of 1.5-2.0 cm and the slump of 2-3 cm is arranged on the cleaned old concrete surface, the grade of the mortar is improved by one level compared with that of the concrete, and the variety of the cement is consistent with that of the cement used by the concrete in the warehouse; the strength of the joint surface of the new and old concrete is improved;
thirdly, reasonably controlling the pouring layer thickness: pouring thick newly-poured concrete by adopting a pumping chute way according to the thickness of 1.5-2.0 m to ensure the continuity, controlling the layering interval time to be about 1.5 hours to ensure the compactness of the concrete, and well performing vibration compaction work in the pouring process;
step 5, waterproof construction of the side wall;
step 5.1, polyurethane waterproof coating film
1) And cleaning a base layer: the waterproof base layer is smooth, firm and dry, has no sharp concave-convex, honeycomb, pitted surface and peeling, has no oil stain, and is characterized in that sealing materials are embedded and subjected to additional waterproof treatment in grooves reserved at cracks, base deformation joints and pipe roots, and the smooth and solid base layer does not need to be coated with a base layer treating agent;
2) and the detailed part is added with a waterproof layer: the construction of an additional waterproof layer is carried out on the foundation details such as the internal corners, the external corners, the deformation joints and the like, the construction can be carried out for 2-4 times, the thickness is not less than 1mm, the tyre body reinforcing material needs to be soaked when needing to be clamped and laid, a layer of polyester non-woven fabric is firstly additionally laid on the deformation joint, and then the coating is additionally coated to form a structure of additional waterproof layer empty laying;
3) and large-surface coating waterproof layer construction: selecting a plastic scraper for uniform blade coating, preferably coating for 2-3 times, wherein when no base layer treating agent is present, the first time is thin-coated to close base layer pores, the second time is coated when finger contact is basically non-stick after the coating is fully cured, the interval time is generally 12 hours, the low temperature is correspondingly prolonged, the second time is vertical to the first time, and when a matrix reinforcing material needs to be laid, the coating is coated while the reinforcing material is laid;
4) closing the head and sealing the edge: sealing the coating adding paint;
5) and protecting the isolation layer: finally finishing the coating waterproof layer, performing quality inspection, performing a water closing test if necessary, and performing construction of a protective isolation layer according to relevant specifications or design requirements after acceptance inspection is qualified;
step 5.2, wet-paving the base polyester tire waterproof coiled material;
1) and (3) base layer treatment: firstly, cleaning the surface, wherein the base layer is solid, flat and clean;
2) and (3) constructing an additional layer: additional layer processing should be carried out on the positions of the internal and external corners, the deformation joints and the like, and the coiled material is firstly cut into proper size and shape;
3) and large-area construction: the non-cured coating is adopted for hot-sticking waterproof coiled material composite construction, and the thickness of the non-cured coating is required to meet the relevant standard requirements; rolling and paving the waterproof coiled material while brushing the non-curing coating;
4) and lap joint treatment: the lap joint width of the coiled materials is 100mm, the lap joint area of the coiled materials is sealed independently, construction is carried out by adopting a hot melting method, and the lap joint position of the upper coiled material and the lower coiled material is the degree of overflowing asphalt strips;
5) and constructing a protective layer: the outer surface of the waterproof layer is provided with a protective layer according to the relevant specification or design requirement;
step 5.3, backfilling the fertilizer tank;
(1) and preparing foam: the foam is prepared by adopting a foam generator, the principle of the foam generator is a physical method, and a foaming agent is input into an automatic foaming system through an air compressor to prepare foam;
(2) and preparing a mixture: the foam concrete mixture preparation machine selects special machines according to engineering requirements, well stirs the mixed cement and water by a foaming machine, then mixes the mixture with a foaming agent in a pipeline, conveys the mixture to a construction site by a high-pressure pump, and performs casting molding;
(3) and casting molding: the foam concrete is viscous fluid containing a large amount of air and adsorption water, the discharge pipe cannot come and go in the foam concrete so as to avoid destroying bubbles, and the template can be removed after the foam roller concrete is solidified;
(4) and maintaining: naturally curing for not less than 72 hours, and after reaching a certain strength, getting on and developing the next procedure, and wet curing is needed under the condition of high temperature;
(5) and checking and protecting finished products: after the foam concrete is poured, a specially-assigned person is required to supervise, and finished product inspection and protection work is well done.
The comprehensive thought of the invention is as follows: taking a rigid connection form between the new structure and the old structure in order to prevent the problem of water leakage at the later-stage joint position due to sedimentation, reserving 10 centimeters of original concrete at the inner side and the outer side of the old structure to form a concave wall body, arranging water swelling and stopping glue at corner nodes, chiseling a groove with the width of 10cm and the depth of 15cm towards the upper groove of the cut surface at the middle part of the inner wall body, washing the groove clean with water, filling the groove with polyurethane two-component sealant, embedding a flexible rubber water stop belt (preventing the new structure from sedimentation and causing crack leakage), and achieving annular communication to form a plurality of water stop nodes. And after the colloid is solidified, pouring high-grade micro-expansive concrete, after the concrete is solidified, removing the mould, and setting an outer wall waterproof process according to the design requirement.
In summary, the invention has the advantages that:
1. compared with a general method for reserving the post-cast strip for sedimentation, the method has the advantages that the trouble that post-cast strip post-construction treatment nodes are not in place is reduced, and factors such as post-cast strip cleaning and water accumulation can be avoided.
2. The old structural wall body is made into a concave shape, and the water-swelling water-stopping adhesive is arranged at the corner point to form a plurality of water-stopping points, so that the hidden danger of leakage of the outer wall is reduced, and the waterproof effect is good.
3. The flexible rubber water stop belt is arranged in the middle of the old structure, so that the phenomena that the wall body is pulled to crack and leak and the like due to natural settlement of the new structure in the future can be prevented.
4. The construction process of the traditional post-cast settling zone is saved, and the controllable effect is achieved in engineering cost control.
Drawings
FIG. 1 is a schematic diagram of the structure formed by the method.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 1, a waterproof method for a concrete abutted seam without a reserved embedded structure in a reconstruction and extension structure is characterized in that: comprises that
Step 1, cleaning a base layer: removing and cleaning the steel bar protrusion and the mortar lump on the surface of the old structure base layer; cleaning and protecting the concave parts at the two sides of the flange of the wall body to prevent collision damage, painting antirust paint on the steel bars at the reserved notch of the original wall body,
step 2, grooving: cutting off partial concrete in the middle of the old structure by a cutter in an annular manner, forming a notch with the width of 10cm and the depth of 15cm, and cleaning the notch by using a dust absorption blower and a blower;
step 3, embedding a rubber waterstop:
1) and cleaning a base layer: in the construction process, the old structural concrete has a plurality of sharp-angled stones and sharp reinforcing steel bars, so when the water stop is positioned, attention should be paid to puncture the rubber water stop due to overlarge force, and timely repair should be carried out when a crack phenomenon is found,
2) and inlaying a water stop: when the rubber water stop is embedded and positioned, the rubber water stop is kept flat at the interface part, and the water stop cannot roll and kink, and if the phenomenon of untwisted and unfoldable kinks is found, the adjustment should be carried out in time;
3) and fixing the water stop belt: when the water stop is fixed, a hole is punched on the allowable part of the water stop, so that the part of the body cannot be damaged,
4) embedding and sealing material: after the water stop belt is fixed, in order to prevent the water stop belt from deviating, the groove is filled with polyurethane two-component sealant so as to prevent the water stop belt from being shortened on one side and affecting the water stop effect;
5) and quality inspection and acceptance: the water stop belt joint is ensured to be well bonded, and the overlapping mode without any treatment is avoided;
6) and pouring concrete: the concrete must be fully vibrated when being tamped so as to prevent the water stop belt and the concrete from being combined badly to influence the water stop effect;
step 4, coating water-swelling water-stop glue: the single-component polyurethane water-swelling water-stop glue annular periphery is injected at the internal corner of the old structure, and after the glue is solidified, a film is well protected on the surface to prevent the glue from being damaged and polluted before concrete pouring;
1) basal plane treatment
Firstly, the base surface must be firm, the surface must not have oil stain, honeycomb, peeling and sanding phenomena, otherwise, the surface must be removed;
secondly, pre-positioning the base surface by adopting a snapping line mode before construction, wherein the positioning deviation is less than or equal to 10mm, and the distance from the base surface to the outer surface of the concrete is more than or equal to 100 mm;
2) adhesive water-stopping glue
The volume of each water-swelling water-stop glue is 320ml, and the extrusion lengths under different extrusion sections are as follows:
secondly, extruding the water-stopping adhesive by using a special adhesive injector, wherein the extrusion width and the extrusion height meet the design requirements, and the extrusion is continuous, uniform, full and free of bubbles or holes;
thirdly, construction in rainy and snowy days is avoided;
fourthly, when the water-stopping adhesive is matched with other waterproof technologies for use, the water-stopping adhesive is applied after other waterproof measures are shaped;
cutting off the water stop glue once the water stop glue has a damaged part or a part expanded in advance, and sticking the water stop glue again on the cut-off part, wherein the lap joint length of the new water stop glue and the old water stop glue is not less than 20mm, the lap joint part is firmly and tightly stuck, and no gap is left at the lap joint part;
3) curing and solidifying
The construction environment temperature is selected from 5 ℃ to 40 ℃. Below 5 ℃, the hardening time can be prolonged under the influence of humidity; the sag is increased above 40 ℃, and the environmental temperature is not lower than-10 ℃ or higher than 50 ℃ during construction;
secondly, the water-stopping adhesive reacts with moisture and humidity in the air and hardens, and the concrete can be continuously poured next time after the surface of the water-stopping adhesive is hardened and completely reaches the touch drying;
4) protection of finished products
Firstly, necessary measures are needed to protect the water-stopping adhesive when binding and welding the reinforcing steel bars near the water-stopping adhesive. Particularly, when the steel bar is welded, the surface of the water-stopping glue is covered with materials such as asbestos cloth and the like;
secondly, the exposed part of the waterproof adhesive is suitable for temporary covering protection;
thirdly, when the period from the construction of the water-stop adhesive to the second concrete pouring is longer, attention is paid to the fact that the protective adhesive body is not soaked, the soaking can cause water expansion to peel off the adhesive body, and the adhesive body needs to be repaired before the concrete is poured; the repairing method is to fix the colloid at the stripping part by a nail; removing accumulated water, removing the stripped colloid, and performing construction again;
step 4, binding steel bars, erecting a wall template, and pouring concrete;
1) and cleaning a base layer: straightening and smoothening the wall body with the old structure by extending the reserved steel bars, and cleaning up the surface sundries
2) And steel bar binding: 2-4 vertical ribs are arranged at the joint of the new structure and the old structure, horizontal rib grading marks are divided, then two horizontal ribs are bound with the lower part and the chest alignment part to fix the positions, the grading marks are divided on the horizontal ribs, the rest vertical ribs are bound, and finally the rest horizontal ribs are bound, and the horizontal ribs at the joint of the new structure and the old structure are in welded lap joint;
3) and installing a template: the method comprises the following steps that a completely black formwork is selected as a formwork, a square steel and steel pipe mode is selected as a back ridge, a three-section type water stop screw is selected to reduce leakage nodes, the contact surface of the clearance between the formwork and a steel bar protection layer is 5cm wide and 3cm deep and is half a strip, and waterproof treatment is strengthened at the position after the formwork is removed;
4) and pouring concrete
Firstly, the material requirement is as follows:
1.1, adopting high-grade low-heat cement concrete with micro-expansibility to enable the elastic modulus of newly poured concrete to be close to that of old concrete, generating certain pre-stress on a joint surface of the new concrete and the old concrete in a construction period, and generating certain compensation effect on later tensile stress;
1.2, the concrete mix proportion design and the concrete construction should ensure the ultimate tensile value or tensile strength, construction uniformity index and strength guarantee rate which are necessary for the concrete design, and the concrete crack resistance is improved in the construction;
secondly, interface processing: before concrete is poured and a warehouse is opened, cement mortar with the thickness of 1.5-2.0 cm and the slump of 2-3 cm is arranged on the cleaned old concrete surface, the grade of the mortar is improved by one level compared with that of the concrete, and the variety of the cement is consistent with that of the cement used by the concrete in the warehouse; the strength of the joint surface of the new and old concrete is improved;
thirdly, reasonably controlling the pouring layer thickness: pouring thick newly-poured concrete by adopting a pumping chute way according to the thickness of 1.5-2.0 m to ensure the continuity, controlling the layering interval time to be about 1.5 hours to ensure the compactness of the concrete, and well performing vibration compaction work in the pouring process;
step 5, waterproof construction of the side wall;
step 5.1, polyurethane waterproof coating film
1) And cleaning a base layer: the waterproof base layer is smooth, firm and dry, has no sharp concave-convex, honeycomb, pitted surface and peeling, has no oil stain, and is characterized in that sealing materials are embedded and subjected to additional waterproof treatment in grooves reserved at cracks, base deformation joints and pipe roots, and the smooth and solid base layer does not need to be coated with a base layer treating agent;
2) and the detailed part is added with a waterproof layer: the construction of an additional waterproof layer is carried out on the foundation details such as the internal corners, the external corners, the deformation joints and the like, the construction can be carried out for 2-4 times, the thickness is not less than 1mm, the tyre body reinforcing material needs to be soaked when needing to be clamped and laid, a layer of polyester non-woven fabric is firstly additionally laid on the deformation joint, and then the coating is additionally coated to form a structure of additional waterproof layer empty laying;
3) and large-surface coating waterproof layer construction: selecting a plastic scraper for uniform blade coating, preferably coating for 2-3 times, wherein when no base layer treating agent is present, the first time is thin-coated to close base layer pores, the second time is coated when finger contact is basically non-stick after the coating is fully cured, the interval time is generally 12 hours, the low temperature is correspondingly prolonged, the second time is vertical to the first time, and when a matrix reinforcing material needs to be laid, the coating is coated while the reinforcing material is laid;
4) closing the head and sealing the edge: sealing the coating adding paint;
5) and protecting the isolation layer: finally finishing the coating waterproof layer, performing quality inspection, performing a water closing test if necessary, and performing construction of a protective isolation layer according to relevant specifications or design requirements after acceptance inspection is qualified;
step 5.2, wet-paving the base polyester tire waterproof coiled material;
1) and (3) base layer treatment: firstly, cleaning the surface, wherein the base layer is solid, flat and clean;
2) and (3) constructing an additional layer: additional layer processing should be carried out on the positions of the internal and external corners, the deformation joints and the like, and the coiled material is firstly cut into proper size and shape;
3) and large-area construction: the non-cured coating is adopted for hot-sticking waterproof coiled material composite construction, and the thickness of the non-cured coating is required to meet the relevant standard requirements; rolling and paving the waterproof coiled material while brushing the non-curing coating;
4) and lap joint treatment: the lap joint width of the coiled materials is 100mm, the lap joint area of the coiled materials is separately sealed, construction is carried out by adopting a hot melting method, and the asphalt strips overflow from the lap joint positions of the upper coiled material and the lower coiled material;
5) and constructing a protective layer: the outer surface of the waterproof layer is provided with a protective layer according to relevant specifications or design requirements;
step 5.3, backfilling the fertilizer tank;
(1) foam preparation
The foam is prepared by adopting a foam generator, the principle is a physical method, a foaming agent is input into an automatic foaming system through an air compressor to prepare foam,
(2) preparation of mixed material
The foam concrete mixture preparation machine selects special machines according to engineering requirements, well stirs the mixed cement and water by a foaming machine, then mixes the mixture with a foaming agent in a pipeline, conveys the mixture to a construction site by a high-pressure pump, and performs casting molding;
(3) and casting molding
The foam concrete is viscous fluid containing a large amount of air and adsorption water, the discharge pipe cannot come and go in the foam concrete so as to avoid destroying bubbles, and the template can be removed after the foam roller concrete is solidified;
(3) maintaining
Naturally curing for not less than 72 hours, and carrying out the next procedure and wet curing at high temperature after reaching a certain strength;
(4) inspection and product protection
After the foam concrete is poured, a specially-assigned person is required to supervise, and finished product inspection and protection work is well done.
Claims (1)
1. A waterproof method for concrete abutted seams without reserved embedded structures in a reconstruction and extension structure is characterized by comprising the following steps: comprises that
Step 1, cleaning a base layer: removing and cleaning the steel bar protrusion and the mortar lump on the surface of the old structure base layer; cleaning and protecting the concave parts at the two sides of the flange of the wall body to prevent collision damage, painting antirust paint on the steel bars at the reserved notch of the original wall body,
step 2, grooving: cutting off partial concrete in an annular manner by adopting a cutting machine at the middle part of the old structure, and forming a notch with the width of 10cm and the depth of 15cm, wherein the notch is cleaned by using a dust absorption blower and a blower;
step 3, embedding a rubber waterstop:
1) and cleaning a base layer: in the construction process, the old structural concrete has a plurality of sharp-angled stones and sharp steel bars, so when the water stop is positioned, attention should be paid to puncture the rubber water stop due to overlarge force, and timely repair should be carried out when a crack phenomenon is found,
2) and inlaying a water stop: when the rubber water stop is embedded and positioned, the rubber water stop is kept flat at the interface part, and the water stop cannot roll and kink, and if the phenomenon of untwisted and unfoldable kinks is found, the adjustment should be carried out in time;
3) and fixing the water stop: when the water stop is fixed, a hole is punched on the allowable part of the water stop, so that the part of the body cannot be damaged,
4) embedding and sealing material: after the water stop belt is fixed, in order to prevent the water stop belt from deviating, the groove is filled with polyurethane two-component sealant so as to prevent the water stop belt from being shortened on one side and affecting the water stop effect;
5) and quality inspection and acceptance: the water stop belt joint is ensured to be well bonded, and the overlapping mode without any treatment is avoided;
6) and pouring concrete: the concrete must be fully vibrated when being tamped so as to prevent the water stop belt and the concrete from being combined badly to influence the water stop effect;
step 4, coating water-swelling water-stop glue: the single-component polyurethane water-swelling water-stop glue annular periphery is injected at the internal corner of the old structure, and after the glue is solidified, a film is well protected on the surface to prevent the glue from being damaged and polluted before concrete pouring;
1) basal plane treatment
Firstly, the base surface must be firm, the surface must not have oil stain, honeycomb, peeling and sanding phenomena, otherwise, the surface must be removed;
secondly, pre-positioning the base surface by adopting a snapping line mode before construction, wherein the positioning deviation is less than or equal to 10mm, and the distance from the base surface to the outer surface of the concrete is more than or equal to 100 mm;
2) adhesive water-stopping glue
The volume of each water-swelling water-stop glue is 320ml, and the extrusion lengths under different extrusion sections are as follows:
secondly, extruding the water-stopping adhesive by using a special adhesive injector, wherein the extrusion width and the extrusion height meet the design requirements, and the extrusion is continuous, uniform, full and free of bubbles or holes;
thirdly, construction in rainy and snowy days is avoided;
fourthly, when the water-stopping adhesive is matched with other waterproof technologies for use, the water-stopping adhesive is applied after other waterproof measures are shaped;
cutting off the water stop glue once the water stop glue has a damaged part or a part expanded in advance, and sticking the water stop glue again on the cut-off part, wherein the lap joint length of the new water stop glue and the old water stop glue is not less than 20mm, the lap joint part is firmly and tightly stuck, and no gap is left at the lap joint part;
3) curing and solidifying
The construction environment temperature is selected from 5 ℃ to 40 ℃. Below 5 ℃, the hardening time can be prolonged under the influence of humidity; the sag is increased above 40 ℃, and the environmental temperature is not lower than-10 ℃ or higher than 50 ℃ during construction;
secondly, the water-stopping adhesive reacts with moisture and humidity in the air and hardens, and the concrete can be continuously poured next time after the surface of the water-stopping adhesive is hardened and completely reaches the touch drying;
4) protection of finished products
Firstly, when steel bars are bound and welded nearby the water stop glue, necessary measures are adopted to protect the water stop glue. Particularly, when the steel bar is welded, the surface of the water-stopping glue is covered with materials such as asbestos cloth and the like;
secondly, the exposed part of the waterproof adhesive is suitable for temporary covering protection;
thirdly, when the period from the construction of the water-stop adhesive to the second concrete pouring is longer, attention is paid to the fact that the protective adhesive body is not soaked, the soaking can cause water expansion to peel off the adhesive body, and the adhesive body needs to be repaired before the concrete is poured; the repairing method is to fix the colloid at the stripping part by a nail; removing accumulated water, removing the stripped colloid, and performing construction again;
step 5, binding steel bars, erecting a wall template, and pouring concrete;
1) and cleaning a base layer: stretching out the reserved steel bars from the old structural wall body, straightening and straightening, and cleaning up the surface sundries
2) And steel bar binding: 2-4 vertical ribs are arranged at the joint of the new structure and the old structure, horizontal rib grading marks are divided, then two horizontal ribs are bound with the lower part and the chest alignment part to fix the positions, the grading marks are divided on the horizontal ribs, the rest vertical ribs are bound, and finally the rest horizontal ribs are bound, and the horizontal ribs at the joint of the new structure and the old structure are in welded lap joint;
3) and installing a template: the method comprises the following steps that a completely black formwork is selected as a formwork, a square steel and steel pipe mode is selected as a back ridge, a three-section type water stop screw is selected to reduce leakage nodes, the contact surface of the clearance between the formwork and a steel bar protection layer is 5cm wide and 3cm deep and is half a strip, and waterproof treatment is strengthened at the position after the formwork is removed;
4) and pouring concrete
Firstly, the material requirement is as follows:
1.1, adopting high-grade low-heat cement concrete with micro-expansibility to enable the elastic modulus of newly poured concrete to be close to that of old concrete, generating certain pre-stress on a joint surface of the new concrete and the old concrete in a construction period, and generating certain compensation effect on later tensile stress;
1.2, the concrete mix proportion design and the concrete construction should ensure the ultimate tensile value or tensile strength, construction uniformity index and strength guarantee rate which are necessary for the concrete design, and the concrete crack resistance is improved in the construction;
secondly, interface processing: before concrete is poured and a warehouse is opened, cement mortar with the thickness of 1.5-2.0 cm and the slump of 2-3 cm is arranged on the cleaned old concrete surface, the grade of the mortar is improved by one level compared with that of the concrete, and the variety of the cement is consistent with that of the cement used by the concrete in the warehouse; the strength of the joint surface of the new and old concrete is improved;
thirdly, reasonably controlling the pouring layer thickness: pouring thick newly-poured concrete by adopting a pumping chute way according to the thickness of 1.5-2.0 m to ensure the continuity, controlling the layering interval time to be about 1.5 hours to ensure the compactness of the concrete, and well performing vibration compaction work in the pouring process;
step 6, waterproof construction of the side wall;
step 5.1, polyurethane waterproof coating film
1) And cleaning a base layer: the waterproof base layer is smooth, firm and dry, has no sharp concave-convex, honeycomb, pitted surface and peeling, has no oil stain, and is characterized in that sealing materials are embedded and subjected to additional waterproof treatment in grooves reserved at cracks, base deformation joints and pipe roots, and the smooth and solid base layer does not need to be coated with a base layer treating agent;
2) and the detailed part is added with a waterproof layer: the construction of an additional waterproof layer is carried out on the foundation details such as the internal corners, the external corners, the deformation joints and the like, the construction can be carried out for 2-4 times, the thickness is not less than 1mm, the tyre body reinforcing material needs to be soaked when needing to be clamped and laid, a layer of polyester non-woven fabric is firstly additionally laid on the deformation joint, and then the coating is additionally coated to form a structure of additional waterproof layer empty laying;
3) and large-surface coating waterproof layer construction: selecting a plastic scraper for uniform blade coating, preferably coating for 2-3 times, wherein when no base layer treating agent is present, the first time is thin-coated to close base layer pores, the second time is coated when finger contact is basically non-stick after the coating is fully cured, the interval time is generally 12 hours, the low temperature is correspondingly prolonged, the second time is vertical to the first time, and when a matrix reinforcing material needs to be laid, the coating is coated while the reinforcing material is laid;
4) closing the head and sealing the edge: sealing the coating adding paint;
5) and protecting the isolation layer: finally finishing the coating waterproof layer, performing quality inspection, performing a water closing test if necessary, and performing construction of a protective isolation layer according to relevant specifications or design requirements after acceptance inspection is qualified;
step 5.2, wet-paving the base polyester tire waterproof coiled material;
1) and (3) base layer treatment: firstly, cleaning the surface, wherein the base layer is solid, flat and clean;
2) and (3) constructing an additional layer: additional layer processing should be carried out on the positions of the internal and external corners, the deformation joints and the like, and the coiled material is firstly cut into proper size and shape;
3) and large-area construction: the non-cured coating is adopted for hot-sticking waterproof coiled material composite construction, and the thickness of the non-cured coating is required to meet the relevant standard requirements; rolling and paving the waterproof coiled material while brushing the non-curing coating;
4) and lap joint treatment: the lap joint width of the coiled materials is 100mm, the lap joint area of the coiled materials is separately sealed, construction is carried out by adopting a hot melting method, and the asphalt strips overflow from the lap joint positions of the upper coiled material and the lower coiled material;
5) and constructing a protective layer: the outer surface of the waterproof layer is provided with a protective layer according to the relevant specification or design requirement;
step 5.3, backfilling the fertilizer tank;
(1) foam preparation
The foam is prepared by adopting a foam generator, the principle is a physical method, a foaming agent is input into an automatic foaming system through an air compressor to prepare foam,
(2) preparation of mixed material
The foam concrete mixture preparation machine selects special machines according to engineering requirements, well stirs the mixed cement and water by a foaming machine, then mixes the mixture with a foaming agent in a pipeline, conveys the mixture to a construction site by a high-pressure pump, and performs casting molding;
(3) and casting molding
The foam concrete is viscous fluid containing a large amount of air and adsorbed water, the discharge pipe cannot come and go in the foam concrete so as to avoid damaging bubbles, and the template can be removed after the foam stick concrete is solidified;
(3) maintaining
Naturally curing for not less than 72 hours, and after reaching a certain strength, getting on and developing the next procedure, and wet curing is needed under the condition of high temperature;
(4) inspection and product protection
After the foam concrete is poured, a specially-assigned person is required to supervise, and finished product inspection and protection work is well done.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470173.4A CN114960978A (en) | 2022-05-01 | 2022-05-01 | Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470173.4A CN114960978A (en) | 2022-05-01 | 2022-05-01 | Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114960978A true CN114960978A (en) | 2022-08-30 |
Family
ID=82980120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210470173.4A Pending CN114960978A (en) | 2022-05-01 | 2022-05-01 | Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114960978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506416A (en) * | 2022-09-26 | 2022-12-23 | 华北水利水电大学 | Lining grouting waterproof structure for joint of new concrete and old concrete in underground engineering and construction process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003027573A (en) * | 2001-07-12 | 2003-01-29 | Terumi Kikuchi | Joint waterproof film for concrete trough and waterproof execution method therefor |
| CN202787526U (en) * | 2012-07-16 | 2013-03-13 | 浙江稠城建筑工程有限公司 | Waterproof old and new concrete joint structure |
| CN104594387A (en) * | 2013-11-04 | 2015-05-06 | 永升建设集团有限公司 | Improved post-pouring strip advanced water-stopping construction method |
| US20170130450A1 (en) * | 2008-11-20 | 2017-05-11 | Emseal Joint Systems, Ltd. | Fire and water resistant expansion joint system |
| CN113529982A (en) * | 2021-08-12 | 2021-10-22 | 五冶集团上海有限公司 | Deformation joint waterproof construction method |
| CN216196849U (en) * | 2021-11-12 | 2022-04-05 | 中国核工业华兴建设有限公司 | Waterproof construction of new and old building concrete bottom plate linking department |
-
2022
- 2022-05-01 CN CN202210470173.4A patent/CN114960978A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003027573A (en) * | 2001-07-12 | 2003-01-29 | Terumi Kikuchi | Joint waterproof film for concrete trough and waterproof execution method therefor |
| US20170130450A1 (en) * | 2008-11-20 | 2017-05-11 | Emseal Joint Systems, Ltd. | Fire and water resistant expansion joint system |
| CN202787526U (en) * | 2012-07-16 | 2013-03-13 | 浙江稠城建筑工程有限公司 | Waterproof old and new concrete joint structure |
| CN104594387A (en) * | 2013-11-04 | 2015-05-06 | 永升建设集团有限公司 | Improved post-pouring strip advanced water-stopping construction method |
| CN113529982A (en) * | 2021-08-12 | 2021-10-22 | 五冶集团上海有限公司 | Deformation joint waterproof construction method |
| CN216196849U (en) * | 2021-11-12 | 2022-04-05 | 中国核工业华兴建设有限公司 | Waterproof construction of new and old building concrete bottom plate linking department |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506416A (en) * | 2022-09-26 | 2022-12-23 | 华北水利水电大学 | Lining grouting waterproof structure for joint of new concrete and old concrete in underground engineering and construction process |
| CN115506416B (en) * | 2022-09-26 | 2024-03-12 | 华北水利水电大学 | Lining grouting waterproof structure of junction between new concrete and old concrete of underground engineering and construction process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110607809B (en) | Waterproof construction method for basement of building engineering | |
| CN103233520B (en) | Self-waterproof construction method of building external wall structure | |
| CN110747899B (en) | Basement waterproof construction method | |
| CN108411939A (en) | The spliced prefabricated pipe gallery of one kind and its construction method | |
| CN112081146A (en) | Construction method of polymer self-adhesive film waterproof coiled material capable of being constructed in rainy season | |
| CN211547827U (en) | Waterproof structure at joint of concrete bottom plates of new and old buildings | |
| CN106988440B (en) | Waterproof structure for main body and auxiliary interface of subway station and construction method of waterproof structure | |
| CN108374566B (en) | Repairing process for leakage water on back water surface | |
| CN109457571B (en) | Construction method for repairing ground deformation joint | |
| CN111705971A (en) | Construction method and structure of thin-wall concrete wall of constructed wetland unit pool | |
| CN111749279A (en) | Waterproof construction method for construction joint with combined design of water-stop steel plate and anti-crack reinforcing steel bar | |
| CN112458907A (en) | Construction method for laying super-high performance concrete layer in super-large area of steel structure | |
| CN114960978A (en) | Waterproof method for concrete abutted seam without reserved embedded structure in reconstruction and extension structure | |
| CN111350268A (en) | Construction method of concrete structure self-waterproof system in sewage treatment engineering | |
| JP6592297B2 (en) | Slab track repair structure, adhesive sheet used for slab track repair structure, and slab track repair method | |
| CN114197524A (en) | Waterproof construction method for civil air defense basement | |
| CN110409600A (en) | Unit-combination type cesspool construction method | |
| CN112195970A (en) | River-crossing tunnel engineering waterproof construction method | |
| US6682260B2 (en) | Roller compacted concrete paving sealing method | |
| CN111255191A (en) | Semi-pre-pasted ceramic tile and paving method thereof | |
| KR102321316B1 (en) | floor space waterproofing construction method | |
| CN110528593B (en) | Heat-insulation waterproof structure for joint of main body and auxiliary structure top plate of station and construction method | |
| KR102078174B1 (en) | Flexible unit for repairing cracked part of concrete structure and maintenance method of cracked part using the flexible unit | |
| RU2669302C1 (en) | Method of repair and sealing of damage in concrete facings of channels | |
| CN112127752A (en) | Construction process for installing and preventing leakage of outer flush type outer window |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |