CN108868185B - Building ground water channeling leakage repairing system - Google Patents
Building ground water channeling leakage repairing system Download PDFInfo
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- CN108868185B CN108868185B CN201810702191.4A CN201810702191A CN108868185B CN 108868185 B CN108868185 B CN 108868185B CN 201810702191 A CN201810702191 A CN 201810702191A CN 108868185 B CN108868185 B CN 108868185B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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Abstract
The invention provides a system for repairing floor surface water channeling leakage, and relates to the technical field of building engineering. The construction method comprises the following steps: a drainage ditch is dug on the ground, one side of the drainage ditch is a water channeling prevention area, and the other side of the drainage ditch is a water accumulation area. And chiseling a groove at one side close to the water channeling prevention area, and performing waterproof treatment on the surface of the groove. First drainage pipe is all pre-buried at both ends in the escape canal, and the limit of first drainage pipe has the V-arrangement groove. And (3) coating an interface waterproof agent on the surface of the drainage ditch including the V-shaped groove, filling waterproof sealing glue and repair mortar in the groove, and coating waterproof paint on the surface of the drainage ditch. And polyester cloth is added in the waterproof coating at the pipe edge and the concave corner of the groove. And respectively preparing clamping grooves which are positioned at two sides of the drainage ditch and used for installing cover plates by using repair mortar and dry mortar. And a second drain pipe is embedded in the inner side wall of the drainage ditch close to the water accumulation area. The drainage ditch is adopted for water interception and drainage, and the structure of the bottom and the outer side of the drainage ditch combines rigid waterproofing and flexible waterproofing to carry out water interception and drainage.
Description
Technical Field
The invention relates to the technical field of building engineering, in particular to a building ground water channeling leakage repairing system.
Background
The problem of floor water leakage is often existed in the building, the floor water leakage is a common quality problem which is difficult to be radically treated in the building engineering, the use function of the building is seriously influenced, and great inconvenience is brought to users. The leakage of the water leakage on the floor surface is caused by that: the periphery of the building in the water accumulation area is not provided with water retaining back beams, the water level outside the rainwater sky rises, and water flows to the inside of the ground of the building or building to generate accumulated water. The accumulated water flows everywhere in the dry mortar layer of the floor tiles of the building and finally permeates, seeps water or leaks from the weak part of the concrete floor slab at the seam position of the floor tiles. The existing accumulated water area is adopted for renovation, the engineering quantity is often too large, the maintenance cost is high, no construction condition exists, and the maintenance cost is greatly reduced by combining drainage and water interception.
Disclosure of Invention
The invention aims to provide a building floor water channeling leakage repairing system to meet the water-proofing requirement of building floor water accumulation areas of buildings.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The invention provides a building ground water channeling leakage repairing system, which comprises the following construction steps:
s1, cutting off part of the ground decoration layer, knocking out the original material layer to the concrete structure layer, and forming a drainage ditch for preventing water channeling, wherein the drainage ditch divides the ground into a water accumulation area at one side of the drainage ditch and a water channeling preventing area at the other side of the drainage ditch;
s2, roughening the surface of the drainage ditch;
s3, chiseling a groove on one side of the drainage ditch close to the water channeling prevention area;
s4, pre-burying first drainage pipes at two ends of the bottom of the drainage ditch, wherein the pipe edges of the first drainage pipes are provided with V-shaped grooves;
s5, coating interface waterproof agent on the bottom of the drainage ditch including the groove and the pipe edge V-shaped groove;
s6, plugging the side wall of the groove close to the water channeling prevention area and the bottom of the pipe edge V-shaped groove by using waterproof sealant;
s7, filling the groove and the pipe edge V-shaped groove with repair mortar;
s8, brushing acrylic waterproof paint on the bottom surface of a drainage ditch containing the outer wall of the first drainage pipe and the surface of the groove;
s9, paving polyester cloth soaked with acrylic waterproof paint on the outer wall of the first drainage pipe and the internal corner of the groove;
s10, brushing acrylic waterproof paint on the bottom surface of the drainage ditch containing the outer wall of the first drainage pipe and the surface of the groove;
s11, brushing a first clamping groove on one side, close to the water channeling prevention area, of the drainage ditch by using repair mortar; brushing a second clamping groove on the other side of the drainage ditch by using common dry mortar, wherein the first clamping groove and the second clamping groove are used for installing a drainage ditch cover plate;
s12, painting and protecting the bottom surface of the drainage ditch with repair mortar, wherein the repair mortar forms a drainage slope;
s13, pre-burying a plurality of second drain pipes arranged at intervals on the inner side wall of the drainage ditch close to the water accumulation area;
s14, adhering rubber pads to the upper surfaces of the first clamping groove and the second clamping groove;
and S15, clamping the drain cover plate into the first clamping groove and the second clamping groove.
The building floor water channeling leakage repairing system provided by the embodiment of the invention has the beneficial effects that:
for the problem of floor water channeling caused by the fact that the building height is lower than the outdoor environment, a drainage ditch is adopted for water interception and drainage. The ground is divided into a water channeling prevention area and a water accumulation area by a drainage ditch. The groove is opened at one side of the drainage ditch, which is close to the water channeling preventing area, and a plurality of waterproof materials are filled in the bottom of the drainage ditch and the groove, so that the water is effectively prevented. At the pre-buried first drain pipe in escape canal bottom, at the pre-buried second drain pipe of one side that the escape canal is close to the ponding region, the escape canal prevents the ponding region from scurrying water everywhere as the cut water point to water drainage to first drain pipe is concentrated, takes multiple material, multiple technology to combine together, and its percolating water problem is solved to the system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a building floor water leakage restoration system according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a building floor water leakage restoration system according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of the aluminum foam preform in fig. 2.
Icon: 10-original material layer; 20-concrete structural layer; 30-a drainage ditch; 31-water channeling prevention zone; 32-water accumulation area; 1-a groove; 21-a first drain pipe; 22-a second drain; 3-V-shaped grooves; 4-interfacial waterproofing agent; 5-waterproof sealant; 6-repairing mortar; 7-acrylic acid waterproof paint; 8-polyester cloth; 9-a first card slot; 11-a second card slot; 12-gutter cover plate; 13-rubber pad; 50-a foamed aluminum preform; 51-a sleeve portion; 52-floor part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The system for repairing the leakage of the water from the floor surface according to the embodiment of the present invention will be specifically described below.
Referring to fig. 1, an embodiment of the present invention provides a system for repairing leakage of water channeling on a floor, where the method includes:
and S1, cutting off part of the ground decoration layer, knocking out the original material layer to the concrete structure layer 20, and forming the drainage ditch 30 for preventing water channeling. The drainage ditch 30 divides the ground into a catchment area 32 on one side of the drainage ditch and a water-channeling-preventing area 31 on the other side of the drainage ditch. For ease of understanding, the original material layer 10 is shown in FIG. 1. Preferably, in the present embodiment, the width of the floor finish layer is cut off to be about 250mm, and the water accumulation area and the water channeling prevention area are sufficiently separated.
And S2, roughening the surface of the drainage ditch 30. The roughening process makes the drainage ditch 30 form a rough surface, and the bonding force with the waterproof material is stronger.
S3, a groove 1 is chiseled in a side of the drainage ditch 30 adjacent to the water channeling-preventing region. Preferably, the groove 1 is formed by an original material layer which knocks the water channeling preventing region inward, and the depth is preferably 30 mm.
S4, embedding the first drainage pipe 21 at two ends of the bottom of the drainage ditch 30, and the first drainage pipeThe pipe edge of the drain pipe 21 has a V-shaped groove 3. The first drain pipe 21 is preferably
The drain pipe, but not limited thereto, is provided with a first drain pipe 21 according to a site span ratio. And the first drain pipe 21 has a portion beyond the concrete structural layer 20.
S5, coating interface waterproofing agent 4 on the bottom surface of the drainage ditch 30 including the groove 1 and the pipe edge V-shaped groove 3. The interface waterproofing agent 4 is beneficial to increasing the adhesive force between the base layer and the material and avoiding the phenomenon of hollowing.
Preferably, the interface waterproof agent 4 comprises liquid materials and powder materials in a mass ratio of 1: 3-4, and the liquid materials comprise the following components in parts by weight: 380 portions of waterproof emulsion and 420 portions of waterproof emulsion; 2-5 parts of a preservative; 2-5 parts of a defoaming agent; 590 portion of water and 610 portions of water. The powder material comprises: cement 320-380 parts; 420 and 460 parts of sand; 150 portions of coarse whiting and 180 portions of coarse whiting; 3-6 parts of porous silicon carbide; 12-16 parts of zeolite molecular sieve; 160 portions of gypsum and 180 portions of gypsum; 1-3 parts of cellulose ether. The above-mentioned raw materials are commercially available. For example, the waterproof emulsion is Basf PS608 waterproof emulsion, the sand is 70-140 grade sand, the coarse whiting is 700CC of Guangfu Jian material company, and the defoaming agent is W086 of Hamming company. By utilizing the gelling effect of the gypsum and the drainage effect of the porous silicon carbide and the zeolite molecular sieve, the waterproof effect can be further improved, and the hardness is enhanced. More preferably, the interface waterproof agent with the compressive strength of 0.8MPa can be obtained by adding the liquid material and the powder material according to the proportion of 1: 3.
S6, the side wall of the groove 1 close to the water channeling-proof area 31 and the bottom of the pipe edge V-shaped groove 3 are sealed by waterproof sealant 5. Preferably, the depth of the groove 1 is filled with a waterproof sealant 5 to a thickness of 15mm, and the depth of the pipe-side V-shaped groove 3 is filled with a waterproof sealant 5 to a thickness of 10 mm.
Preferably, the waterproof sealant 5 comprises: 120-140 parts of liquid polysulfide rubber; 0.5-1 part of silane coupling agent; 16-20 parts of manganese dioxide; 8-10 parts of carbon black; 3-5 parts of acrylic resin; 20-30 parts of diethanolamine; 4-8 parts of sorbitol; 3-5 parts of a dispersing agent; and 4-8 parts of a leveling agent. The above raw material components are commercially available. The polysulfide waterproof sealant and the base layer interface agent have good compatibility, and can generate good bonding effect between the two. The mechanical property of the sealant is improved by the carbon black, and the addition of the diethanol amine destroys hydrogen bonds among macromolecules of the polysulfide rubber, increases the distance among the molecules and endows the sealant with good coating workability.
And S7, filling the groove 1 and the pipe edge V-shaped groove 3 with the repair mortar 6, and smearing a 45-degree arc chamfer slope by the repair mortar 6.
Preferably, the repair mortar 6 comprises, in parts by weight: 200 portions and 300 portions of sulphoaluminate cement; 200 portions and 300 portions of Portland cement; 500 portions and 600 portions of quartz sand; 1-2 parts of a defoaming agent; 2-4 parts of cellulose ether; 1-2 parts of a water reducing agent; 16-20 parts of fly ash; 1-2 parts of an early strength agent. The above raw material components are commercially available. For example, the sulphate aluminium cement R SAC52.5 grade sulphate aluminium cement, the defoaming agent is tributyl phosphate. The portland cement is one of PO42.5 portland cement or PO52.5 portland cement. The water reducing agent is a polycarboxylic acid water reducing agent, and the early strength agent is one of anhydrous calcium chloride, anhydrous sodium sulfate, lithium carbonate or sodium carbonate. The addition of the fly ash can reduce the alkalinity and the hydration heat of the system, so that the microcracks of the hardened body of the composite gelling system are reduced, the durability of the system can be improved, the fly ash can further improve the strength and the compactness of the repair mortar, improve the wear resistance and reduce the drying shrinkage through the hydration reaction.
And S8, coating acrylic waterproof paint 7 on the bottom surface of the drainage ditch 30 including the outer wall of the first drainage pipe 21 and the surface of the groove 1. The brushing thickness is preferably 1 mm.
Preferably, the acrylic waterproof coating 7 comprises the following components in parts by weight: acrylic emulsion 350-450 parts; 0.5-1.5 parts of pH regulator; 0.5-1.5 parts of wetting agent; 2-4 parts of a defoaming agent; 2-4 parts of a preservative; 2-4 parts of a dispersing agent; 7-12 parts of a film-forming assistant; 14-18 parts of a propylene glycol antifreeze agent; 46-52 parts of rutile titanium dioxide; 280-340 parts of coarse whiting; 22-28 parts of calcined kaolin; 160 portions of water and 200 portions of water. The above raw material components are commercially available. For example, as the styrene-acrylic emulsion, commercially available acalma ENCOR 5181; the pH regulator can adopt a commercially available Droju MA-95pH regulator; as the wetting agent, a commercially available Dow x-405 wetting agent can be used; the film-forming assistant can adopt a commercial Issman film-forming assistant texanol; as the defoaming agent, W086 available from Hamming corporation was used.
And S9, paving polyester cloth 8 soaked with acrylic waterproof paint on the outer wall of the first drainage pipe 21 and the internal corner of the groove 1. The polyester cloth can increase the stability and tensile strength of the structure. The polyester cloth 8 has a strong extension force, and can increase the tensile strength and the extension force of the waterproof structure. And the polyester cloth soaked with the acrylic waterproof coating can form more slurry bonding layers, and the adhesive force is stronger.
And S10, painting acrylic waterproof paint 7 on the bottom surface of the drainage ditch 30 containing the outer wall of the first drainage pipe 21 and the surface of the groove 1.
S11, brushing the first catching groove 9 with repair mortar on the side of the drainage ditch 30 near the water channeling prevention area 31; and a second clamping groove 11 is brushed out by common dry mortar at the other side of the drainage ditch. The first clamping groove 9 and the second clamping groove 11 are used for installing a drain cover plate 12. The first clamping groove 9 is made of repair mortar, and the waterproof effect of the water channeling preventing area can be further guaranteed. And second draw-in groove 11 adopts ordinary dry mortar preparation, makes things convenient for follow-up pre-buried second drain pipe, derives the inside ponding in ponding region 32 more easily, and the drainage effect is better.
At S12, the bottom surface of the drainage ditch 30 is protected by the repair mortar 6, and the repair mortar forms a drainage gradient inclined toward the first drainage pipe 21. The painting repair mortar can further protect the waterproof structure from water.
And S13, pre-burying a plurality of second drain pipes 22 arranged at intervals on the inner side wall of the drainage ditch 30 close to the water accumulation area 32. In this embodiment, the second drain pipe 22 is selected
And the second drainage pipes 22 are arranged along the length direction of the drainage ditch 30, and the distance between the second drainage pipes 22 is preferably 150 mm.
S14, rubber pads 13 are adhered to the upper surfaces of the first card slot 9 and the second card slot 11. The rubber pad 13 is additionally arranged in the clamping groove, so that the drainage ditch cover plate 12 is in soft contact with the clamping groove, the anti-seismic effect is better, and the drainage ditch cover plate 12 is prevented from damaging the clamping groove.
And S15, the drain cover plate 12 is clamped into the first clamping groove 9 and the second clamping groove 11, and the drain cover plate 12 is installed.
In the present embodiment, the above-mentioned construction steps are performed in the order of S1, S2, and …, S14, and S15, thereby forming a waterproof structure stacked layer by layer.
The drainage system utilizes the drainage ditch to cut off and drain water, and the second drainage pipe leads the accumulated water in the accumulated water area into the drainage ditch for drainage. And the bottom of the drainage ditch and the side wall close to the water channeling prevention area are subjected to water prevention by a method combining rigid water prevention and flexible water prevention, so that the water prevention effect is excellent and can reach 10 years.
Example 2
The device obtained by the design can basically meet the waterproof requirement of the floor, but the designer further improves the device according to the aim of further improving the function of the device. For a brief description, the corresponding contents in embodiment 1 can be referred to where this embodiment is not mentioned.
Referring to fig. 2 and 3, in order to further increase the waterproof effect of the pipe edge of the first water discharging pipe 21, in the embodiment, after the step S7 and before the step S8, the method further includes the following steps: the part of the first drainage pipe 21, which exceeds the repair mortar, is sleeved with a foamed aluminum prefabricated part 50. The foamed aluminum preform 50 includes a sleeve portion 51 having a hollow cylindrical shape and a bottom plate portion 52 formed to extend outward along a bottom edge of the sleeve portion. The thickness of the foamed aluminum prefabricated member 50 is preferably 20-25 mm. If the thickness is too small, a good vibration damping effect cannot be achieved, and the compression resistance is poor. And the thickness is too large, the cost is high, and the installation is inconvenient.
Further, there is a gap between the foamed aluminum preform 50 and the outer sidewall of the first drain pipe 21, and bentonite is filled in the gap. The gap is approximately 2-4 mm. The height of the foamed aluminum preform 50 is slightly lower than the exposed height of the first drain pipe 21. The aluminum foam preform 50 and the top of the gap are closed with a sealing material (e.g., silicone gel). The bentonite is filled in the gap, the bentonite can permeate into the pores of the foamed aluminum prefabricated member, when water leakage occurs, water is contacted with the bentonite, bentonite particles expand when encountering water, a solid waterproof layer is formed between the foamed aluminum prefabricated member and the pipelines, the water diffusion is effectively prevented, and the water leakage phenomenon is effectively prevented.
During construction, the foamed aluminum preform 50 is sleeved outside the first drain pipe 21, and the bottom plate 52 is in contact with the ground. Then, the gap between the aluminum foam preform 50 and the first drain pipe 21 is filled with bentonite, and the top is sealed with silicone adhesive. And then, in step S8, painting acrylic waterproof paint 7 on the outer wall of the foamed aluminum prefabricated part, wherein the painting thickness is 1 mm. Then, the polyester cloth 8 soaked with the acrylic waterproof coating is paved, and the acrylic waterproof coating 7 is further coated on the surface of the polyester cloth 8, wherein the coating thickness is 1 mm.
The foamed aluminum is prepared by adding an additive into pure aluminum or aluminum alloy and then performing a foaming process, has the characteristics of metal and bubbles, and has the functions of energy absorption, fire prevention, corrosion resistance, sound insulation, noise reduction and the like. The first drainage pipe 21 is sleeved with the foamed aluminum prefabricated part 50, so that the vibration of the pipeline can be absorbed, and the influence of the water pressure of the pipeline is effectively reduced. Equivalently, an isolation layer is formed outside the pipeline 40, so that the risk of cracking at the position of the pipe edge is greatly reduced.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (7)
1. A building floor water channeling leakage repairing system is characterized in that the repairing system comprises the following construction steps:
s1, cutting off part of the ground decoration layer, knocking out the original material layer to the concrete structure layer, and forming a drainage ditch for preventing water channeling, wherein the drainage ditch divides the ground into a water accumulation area at one side of the drainage ditch and a water channeling preventing area at the other side of the drainage ditch;
s2, roughening the surface of the drainage ditch;
s3, chiseling a groove on one side of the drainage ditch close to the water channeling prevention area;
s4, pre-burying first drainage pipes at two ends of the bottom of the drainage ditch, wherein the pipe edges of the first drainage pipes are provided with V-shaped grooves;
s5, coating interface waterproof agent on the bottom of the drainage ditch including the groove and the pipe edge V-shaped groove;
s6, plugging the side wall of the groove close to the water channeling prevention area and the bottom of the pipe edge V-shaped groove by using waterproof sealant;
s7, filling the groove and the pipe edge V-shaped groove with repair mortar;
s8, brushing acrylic waterproof paint on the bottom surface of a drainage ditch containing the outer wall of the first drainage pipe and the surface of the groove;
s9, paving polyester cloth soaked with acrylic waterproof paint on the outer wall of the first drainage pipe and the internal corner of the groove;
s10, brushing acrylic waterproof paint on the bottom surface of the drainage ditch containing the outer wall of the first drainage pipe and the surface of the groove;
s11, brushing a first clamping groove on one side, close to the water channeling prevention area, of the drainage ditch by using repair mortar; brushing a second clamping groove on the other side of the drainage ditch by using common dry mortar, wherein the first clamping groove and the second clamping groove are used for installing a drainage ditch cover plate;
s12, painting and protecting the bottom surface of the drainage ditch with repair mortar, wherein the repair mortar forms a drainage slope;
s13, pre-burying a plurality of second drain pipes arranged at intervals on the inner side wall of the drainage ditch close to the water accumulation area;
s14, adhering rubber pads to the upper surfaces of the first clamping groove and the second clamping groove;
and S15, clamping the drain cover plate into the first clamping groove and the second clamping groove.
2. The system for repairing a floor-based water leakage according to claim 1,
the interface waterproof agent comprises liquid materials and powder materials in a mass ratio of 1: 3-4, and is prepared from the following components in parts by weight,
3. the system for repairing a floor-based water leakage according to claim 1,
the acrylic waterproof coating comprises the following components in parts by weight:
4. the system for repairing a floor-based water leakage according to claim 1,
the waterproof sealant comprises the following components in parts by weight:
5. the system for repairing floor water channeling leakage according to claim 1, wherein the repair mortar comprises, in parts by weight:
6. the system for repairing floor/surface water channeling leakage according to claim 1, wherein the first drainage pipe has a portion exceeding the repair mortar, and further comprising the steps of, after the step S7 and before the step S8: the first drainage pipe is sleeved with a foamed aluminum prefabricated part beyond the repair mortar part, and the foamed aluminum prefabricated part comprises a hollow cylindrical sleeve part and a bottom plate part formed by outwards extending along the bottom edge of the sleeve part.
7. The system according to claim 6, wherein a gap is formed between the aluminum foam preform and the outer side wall of the first drainage pipe, bentonite is filled in the gap, and the aluminum foam preform and the top of the gap are closed with a sealing material.
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| JPH09184206A (en) * | 1995-12-28 | 1997-07-15 | Ohbayashi Corp | Joint inducing crack |
| KR100396851B1 (en) * | 2002-02-23 | 2003-09-02 | Woo Shin Co Ltd | Method for repairing crack of sleeve inside underground valve chamber |
| CN2876207Y (en) * | 2006-03-15 | 2007-03-07 | 刘丹 | Water leakage proof structure of floor surface or roof surface deformed seam |
| CN201125391Y (en) * | 2007-09-11 | 2008-10-01 | 中国建筑第六工程局有限公司 | Basement waterproofing drainage structure |
| CN101560838B (en) * | 2009-05-25 | 2011-03-02 | 东莞市彩丽建筑维护技术有限公司 | Method for preventing and controlling water leakage in building wall bodies |
| CN103628502B (en) * | 2012-08-21 | 2018-07-27 | 邹新建 | The method for doing underground engineering bottom plate hollow floor with plastic draining board |
| CN105201002B (en) * | 2015-10-23 | 2017-08-25 | 金磐集团有限公司 | A kind of underground structure oozes drainage system and its construction method |
| CN205637047U (en) * | 2016-05-30 | 2016-10-12 | 中冶建工集团有限公司 | Drainage structures and prevent combination formula drain pipe of floor drain infiltration leaks floor concrete |
| CN206052786U (en) * | 2016-08-24 | 2017-03-29 | 广东佰昌电力设备有限公司 | A kind of man-hole opening waterproof sealing structure |
| CN206625262U (en) * | 2017-03-22 | 2017-11-10 | 河南城建学院 | A kind of concrete water-proof structure for basement bottom board |
| CN106968451B (en) * | 2017-04-21 | 2019-06-18 | 上海东方雨虹防水工程有限公司 | A kind of prestressing force roof boarding leakage maintaining method and its system |
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Effective date of registration: 20220414 Address after: 361000 3f-a634, Zone C, innovation building, software park, torch high tech Zone, Xiamen, Fujian Patentee after: Xiamen Dingchao building repair Research Institute Co.,Ltd. Address before: 361000 room 2105, 21 tower, 166 East Tower Road, Siming District, Xiamen, Fujian. Patentee before: XIAMEN DR.WATERPROOF BUILDING ENGINEERING CO.,LTD. |
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