CN113737994A - Protection structure and method for prefabricated double-skin superposed wall and UHPC post-cast section wall - Google Patents
Protection structure and method for prefabricated double-skin superposed wall and UHPC post-cast section wall Download PDFInfo
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- CN113737994A CN113737994A CN202110889926.0A CN202110889926A CN113737994A CN 113737994 A CN113737994 A CN 113737994A CN 202110889926 A CN202110889926 A CN 202110889926A CN 113737994 A CN113737994 A CN 113737994A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011241 protective layer Substances 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims description 38
- 238000000576 coating method Methods 0.000 claims description 38
- 230000001681 protective effect Effects 0.000 claims description 37
- 239000002390 adhesive tape Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 18
- 230000007774 longterm Effects 0.000 abstract description 7
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- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010865 sewage Substances 0.000 description 12
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- 239000010410 layer Substances 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000011440 grout Substances 0.000 description 6
- 238000007569 slipcasting Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
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- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 238000009415 formwork Methods 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
-
- 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
- E04B1/665—Sheets or foils impervious to water and water vapor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
-
- 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
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a protection structure and a method for a prefabricated double-skin superposed wall and a UHPC post-cast section wall, wherein the protection structure comprises the following steps: and the continuous grouting pipe is horizontally arranged in a wall body of an interface between the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body and is exposed out of two ends of the wall body, and grouting holes which are communicated in a one-way mode from inside to outside are arranged on the continuous grouting pipe at preset intervals. The invention can protect the wall reinforcing steel bars in the wall by grouting the grouting protective layer formed in the wall by the continuous grouting pipe, thereby improving the waterproof and anticorrosive capability, prolonging the protection period and realizing long-term waterproof and anticorrosive.
Description
Technical Field
The invention relates to the field of assembly type buildings, in particular to a protection structure and a method for a prefabricated double-skin superposed wall and a UHPC post-cast section wall.
Background
In a building main body of a reinforced concrete structure involving a lot of water, such as an underground sewage treatment plant, since a node between a wall body and a floor slab of the building main body is in direct contact with water resources such as sewage, chemical erosion is easily caused to the building main body of the reinforced concrete structure. When the prefabricated double-skin composite wall is adopted to construct the building main body, harmful media are easier to permeate through joints between prefabricated components such as the prefabricated double-skin composite wall and the floor slab, so that the harmful defects such as corrosion of reinforcing steel bars and cracking of concrete are caused, and the structure of the building main body is deteriorated or damaged. At present, most of anticorrosion measures for reinforced concrete structures and precast concrete structures are surface coating treatment, such as epoxy resin coating, silane impregnation and the like, and a compact protective layer is formed on the surface of concrete to prevent harmful media from invading. However, the general coating can only close microscopic gaps of concrete, and has no protective effect on joints of prefabricated parts. Moreover, the coating has a limited service life and cannot achieve long-term and continuous protection. When the prefabricated double-skin superposed wall is used as a structural shear wall, the requirement on the strength of a horizontal connection node between a wall body and the ground is high, and ultrahigh-strength concrete materials (UHPC) can be adopted for bottom grouting connection in engineering. In the grouting process, the UHPC liquid level rises to contact with the prefabricated double-skin superposed wall, and the connection of the horizontal joint is completed. However, the connection due to the rise of the liquid level may be not tight. And UHPC is a material with larger shrinkage, and cracks are easily generated at the joints, so when the waterproof coating fails, harmful media such as water, corrosive substances and the like can permeate into the reinforcing steel bars in the wall body through the cracks, so that the reinforcing steel bars are corroded, and the wall body is damaged.
Disclosure of Invention
The invention aims to solve the technical problem of providing a protective structure and a method for a prefabricated double-skin superposed wall and a UHPC post-cast section wall body, and solving the problem that the wall body steel bars are rusted due to cracks generated at the interface of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body.
In order to solve the technical problem, the invention provides a protective structure for a prefabricated double-skin superposed wall and a UHPC post-cast wall, which comprises:
and the continuous grouting pipe is horizontally arranged in a wall body of an interface between the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body and is exposed out of two ends of the wall body, and grouting holes which are communicated in a one-way mode from inside to outside are arranged on the continuous grouting pipe at preset intervals.
Furthermore, according to the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, the continuous grouting pipes are a plurality of independent grouting pipes, and the continuous grouting pipes are sequentially arranged from outside to inside from the upstream side of the wall with the interface.
Furthermore, according to the protective structure for the prefabricated double-skin superposed wall and the UHPC post-cast section wall, more than 2 continuous grouting pipes are arranged in the wall body of the interface between the wall body on each side of the prefabricated double-skin superposed wall and the UHPC post-cast section wall.
Further, the protection structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall further comprises:
and the waterproof adhesive tape is sealed and arranged on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body.
Further, the protection structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall further comprises:
and the waterproof coating is coated on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body, and the waterproof coating is positioned on the inner side and/or the outer side of the waterproof adhesive tape.
In order to solve the technical problems, the invention also provides a use method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, when a crack is generated on the wall body at the interface of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, grout is injected into the water facing surface of the interface wall from outside to inside in batches at a certain pressure through at least one of a plurality of continuous grouting pipes, and the grout flows along the horizontal direction of the interface wall and flows into the crack of the wall body through a unidirectional-flow grouting hole so as to form a grouting protective layer in the wall body at the interface.
Further, according to the using method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, the waterproof adhesive tape is arranged on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall in a sealing mode.
Further, the use method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body, provided by the invention, comprises the step of coating a waterproof coating on the wall body surface of the interface of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body, wherein the waterproof coating is coated on the inner side and/or the outer side of the waterproof adhesive tape.
In order to solve the technical problems, the invention also provides a construction method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast wall, which comprises the following steps:
the lower end of a wall body of the prefabricated double-skin superposed wall is provided with a plurality of continuous grouting pipes for independent grouting along the horizontal direction and exposed out of two ends of the wall body, the continuous grouting pipes are sequentially arranged from outside to inside from the upstream surface of the wall body of an interface, and each continuous grouting pipe is provided with grouting holes which are communicated in a one-way mode from inside to outside at intervals;
hoisting and binding self-supporting anchor bars of the prefabricated double-skin composite wall on floor anchor bars of a floor slab;
erecting a post-pouring section side template at the interface of the prefabricated double-skin composite wall and the floor slab and pouring UHPC to a specified height to form a UHPC post-pouring section wall body so as to finish the assembly and connection of the prefabricated double-skin composite wall and the floor slab node;
erecting a prefabricated double-skin superposed wall inter-wall side mold, and pouring concrete between the double-skin superposed walls to form a core-filled concrete inner wall;
sealing and arranging a waterproof adhesive tape on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body;
and (3) coating a waterproof coating on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, wherein the waterproof coating is positioned on the inner side and/or the outer side of the waterproof adhesive tape.
The construction method of the protective structure of the prefabricated double-skin laminated wall and the UHPC post-cast wall body according to the claim 1, wherein the continuous grouting pipe is arranged on the lower surface and the inner surface of the lower end of the wall body of the prefabricated double-skin laminated wall and/or between the wall bodies of the double-skin laminated wall.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a protective structure, a using method and a construction method of a prefabricated double-skin superposed wall and a UHPC post-cast section wall body. On one hand, corrosive substances such as sewage and the like are prevented from permeating into the wall body of the interface through the crack to cause corrosion to the wall body reinforcing steel bars through the grouting protective layer in the wall body, so that the waterproof and anticorrosion capabilities of the interface wall body are improved. On the other hand, the crack is filled, so that the repair of the shrinkage crack in the UHPC post-cast section wall body is realized, and the service life of the wall body with the interface is prolonged.
According to the construction method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, the waterproof coating is coated on the surface of the wall body of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, so that the waterproof capability of the wall body of the interface at the joint and the whole surface of the wall body is improved, water is prevented from permeating steel bars in the wall body to corrode the steel bars, and the phenomenon that the wall body is cracked in a large area due to overlong soaking time when the wall body of the interface is used in a water environment is prevented. The waterproof adhesive tape is sealed on the surface of the wall body of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body, so that one outer protection is added, when the waterproof coating fails, the waterproof adhesive tape blocks corrosive substances such as sewage and the like from permeating into the wall body reinforcing steel bars to corrode the reinforcing steel bars, the waterproof and anti-corrosion capability of the interface wall body at the joint is enhanced, and the function of harmful medium invasion is mainly played. The grouting protective layer is formed by grouting the continuous grouting pipe, so that when the protective capacity of the waterproof adhesive tape fails, corrosive substances such as sewage and the like are prevented from permeating into the wall reinforcing steel bars and corroding the reinforcing steel bars through the grouting protective layer in the wall, and the waterproof and anticorrosion capacity of the interface wall at the joint is further enhanced. And the grouting protective layer can be formed in batches from outside to inside along the upstream surface of the wall body, and after the first grouting protective layer fails, the next grouting protective layer plays a role in water resistance and corrosion resistance. The invention realizes the purpose of long-term water resistance and corrosion resistance through the external protective layer consisting of the waterproof coating and the waterproof adhesive tape and the internal protective layer consisting of the grouting protective layer.
Drawings
FIG. 1 is a schematic structural view of a prefabricated double-skin composite wall and a floor slab in an assembled state;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural view of a prefabricated double-skin composite wall and a floor slab after pouring;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a schematic view of the structure of the continuous grouting pipe;
FIG. 6 is a schematic cross-sectional view taken at C-of FIG. 5;
shown in the figure:
100. prefabricated double-skin superposed wall, 110, wall body of the prefabricated double-skin superposed wall, 120, self-supporting anchor bars, 130, truss reinforcing steel bars, 140, inter-beam connecting reinforcing steel bars, 150, UHPC post-cast section wall body, 160, core-poured concrete inner wall, 170 and inter-beam vertical joint wall;
200. floor 210, floor anchor bar;
300. a continuous grouting pipe 310, a grouting hole;
400. post-pouring section side formworks;
500. a waterproof tape.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures: the advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
Referring to fig. 3 to 6, an embodiment of the present invention provides a protective structure for a prefabricated double-skin laminated wall and a UHPC post-cast wall, which includes:
the continuous grouting pipe 300 is horizontally arranged in the wall body of the interface between the wall body 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast section wall body 150 and is exposed out of two ends of the wall body, and the continuous grouting pipe 300 is provided with grouting holes 310 which are communicated in a one-way mode from inside to outside at preset intervals. The one-way flow is also called one-way opening, and the function of the one-way flow is to prevent UHPC from entering the continuous grouting pipe 300 and being blocked when the UHPC post-cast section wall 150 is poured. The continuous grouting pipe 300 may be a hose, which has an effect of facilitating the opening of the grouting hole 310, and has an effect of being not easily crushed or damaged, and is conveniently reserved in a wall body. Of course, a rigid tube is also possible for the purpose of the invention. Wherein the horizontal direction is the length direction of the wall 110.
Referring to fig. 2 and 4, in order to achieve the purpose of long-term protection, in a protection structure of a prefabricated double-skin laminated wall and a UHPC post-cast wall according to an embodiment of the present invention, a plurality of continuous grouting pipes 300 are independently grouted, and the plurality of continuous grouting pipes 300 are sequentially arranged from the outside to the inside of a water-facing surface of an interface wall. When the continuous grouting protection layer is used, one continuous grouting pipe 300 can be grouted in batches along the upstream face from outside to inside to form a grouting protection layer in the wall, and when the grouting protection layer fails, the next continuous grouting pipe 300 is injected to form the next grouting protection layer, so that the protection period is prolonged, and the purposes of long-term water resistance and corrosion resistance are achieved.
Referring to fig. 2 and 4, in the protective structure for the prefabricated double-skin laminated wall and the UHPC post-cast wall according to the embodiment of the present invention, 2 or more continuous grouting pipes 300 are disposed in the wall body at the interface between each wall body of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150. The figure illustrates 6 independently grouted continuous grouting pipes 300, i.e. 3 grouting pipes are arranged in each wall body of the interface of each side wall body 110 and the UHPC post-cast wall section 150. When the wall body is on the single side of the water-facing surface, a continuous grouting pipe 300 can be grouted in batches from outside to inside on the water-facing surface to form a grouting protective layer; when the two sides of the wall body are both facing water surfaces, the two sides of the wall body are simultaneously grouted by the continuous grouting pipe 300 from outside to inside in batches along the facing water surfaces to form two grouting protective layers so as to prevent corrosive substances such as sewage and the like from permeating to corrode reinforcing steel bars in the wall body.
Referring to fig. 3 to 4, in order to improve the protection effect of the outer side of the wall body, the protection structure of the prefabricated double-skin laminated wall and the UHPC post-cast wall section according to the embodiment of the present invention may further include:
and the waterproof adhesive tape 500 is arranged on the wall surface of the interface between the wall body 110 of the prefabricated double-skin superposed wall 100 and the UHPC post-cast section wall body 150 in a sealing way. For example: the waterproof tape 500 is adhered to the surface of the wall. The waterproof tape 500 can improve long-acting protection ability, and has a longer service life compared to a waterproof coating, so that the waterproof and anticorrosive outer protection period can be prolonged, and the waterproof and anticorrosive ability can be improved.
The protection structure for the prefabricated double-skin superposed wall and the UHPC post-cast section wall provided by the embodiment of the invention can also comprise:
and a waterproof coating layer coated on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall section 150, wherein the waterproof coating layer is positioned on the inner side and/or the outer side of the waterproof adhesive tape 500.
According to the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body provided by the embodiment of the invention, the outer protection can sequentially comprise the outer waterproof coating, the waterproof adhesive tape and the inner waterproof coating, so that three outer protective layers are formed on the outer side of the wall body, the protection capability is improved, and the purpose of long-term protection is realized.
Example two
Referring to fig. 4, a second embodiment of the present invention provides a method for using a protective structure of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150 of the first embodiment, which includes:
when the wall body of the interface between the wall body 110 of the prefabricated double-skin superposed wall 100 and the UHPC post-cast section wall body 150 has cracks, grout is injected into the upstream surface of the interface wall body from outside to inside at a certain pressure in batches through at least one of the continuous grouting pipes 300, and flows along the horizontal direction of the interface wall body and flows into the cracks of the wall body through the unidirectional-flow grouting holes 310, so that a grouting protective layer is formed in the wall body of the interface. The grout is mainly anticorrosive glue or sealant and can also be cement paste. The anti-corrosion glue or the sealant has certain viscosity, can better fill cracks to play a role in protection, and prevents the permeation of harmful substances such as water and the like.
In the application method of the protective structure of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150 according to the second embodiment of the present invention, a plurality of grouting protective layers in the wall body are formed by grouting at least one of the plurality of continuous grouting pipes 300 from outside to inside in batches along the upstream surface of the interface wall body, so that when the external protective layer fails, the internal grouting protective layer plays a protective role, so as to prevent corrosive substances such as water from penetrating into the wall body to corrode the steel bars in the wall body.
Referring to fig. 3 to 4, in the method for using the protective structure of the prefabricated double-skin laminated wall and the UHPC post-cast section wall according to the second embodiment of the present invention, a waterproof tape 500 is sealed and disposed on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast section wall 150.
In the application method of the protective structure for the prefabricated double-skin laminated wall and the UHPC post-cast wall according to the second embodiment of the present invention, a waterproof coating (not shown) is coated on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150, and the waterproof coating is coated on the inner side and/or the outer side of the waterproof tape 500.
EXAMPLE III
Referring to fig. 1 to 6, a third embodiment of the present invention provides a construction method of a protective structure of a prefabricated double-skin laminated wall and a UHPC post-cast wall, including:
step S1, referring to fig. 1 to 2 and 5 to 6, a plurality of continuous grouting pipes 300 for independent grouting are horizontally arranged at the lower end of the wall 110 of the prefabricated double-skin laminated wall 100 and exposed at two ends of the wall, the plurality of continuous grouting pipes 300 are sequentially arranged from the outside to the inside from the upstream side of the wall at the interface, and each continuous grouting pipe 300 is provided with grouting holes 310 which flow in one direction from the inside to the outside at intervals.
Step S2, please refer to fig. 1 to 2, hanging the self-supporting anchor bars of the prefabricated double-skin composite wall 100 on the floor anchor bars of the floor and binding them. The floor 200 may be a floor or a floor of another layer. The prefabricated double-skin laminated wall 100 includes a wall body 110, self-supporting anchor bars 120, truss reinforcing steel bars 130 and inter-beam connecting reinforcing steel bars 140. Wherein the floor 200 includes floor studs 210.
Step S3, please refer to fig. 3 to 4, a post-cast section side form is erected at the interface between the prefabricated double-skin composite wall 100 and the floor slab, and UHPC is poured to a designated height to form a UHPC post-cast section wall 150, so as to complete the assembly and connection of the prefabricated double-skin composite wall 100 and the floor slab node.
In step S4, referring to fig. 3 to 4, 100 side forms of the prefabricated double-skin overlapped wall are erected, and concrete is poured between the double-skin overlapped wall to form the core-filled concrete inner wall 160. When the prefabricated double-skin laminated wall 100 is two or less, concrete may be cast at the inter-panel connection bars 140 to form the inter-panel perps wall 170.
Step S5, an inner waterproof coating is coated on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150, and the waterproof coating is located on the inner side of the waterproof tape 500. To better apply the inner water-repellent coating, the wall surface may be smoothed prior to application. So that the wall surface of the interface is firm and has no floating ash or pollutant, and the protection effect of the waterproof coating is improved.
In step S6, referring to fig. 3 to 4, a waterproof tape 500 is sealed and disposed on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall section 150. Wherein the waterproof tape 500 can prevent the intrusion of harmful media into the interface.
Step S7, coating an outer waterproof coating on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast wall 150, where the waterproof coating is located outside the waterproof tape 500.
In the construction method of the protective structure of the prefabricated double-skin laminated wall and the UHPC post-cast wall according to the third embodiment of the present invention, the continuous grouting pipe 300 is disposed on the lower surface and the inner surface of the lower end of the wall body 110 of the prefabricated double-skin laminated wall 100 and/or between the wall bodies of the double-skin laminated wall. In which the continuous casting pipes 300 are arranged along the same line in the horizontal direction, and may be arranged non-linearly. In order to better protect the wall reinforcing bars, the continuous grouting pipe 300 may be terminated before the self-supporting anchor bars 120 and the floor anchor plates 210 of the prefabricated double-skin laminated wall 100. The continuous grouting pipe 300 is not suitable to be too long, so that blockage is easy to generate or the grouting pressure is too large, and the construction efficiency is influenced. At most, 2-3 prefabricated double-skin superposed walls can share one set of continuous grouting pipe 300. Each continuous slip casting 300 can be used only once, with the sequence of use proceeding from outside to inside.
In order to improve the protection effect of the grouting protection layer, in the construction method of the protection structure of the prefabricated double-skin laminated wall and the UHPC post-cast wall provided by the third embodiment of the present invention, the continuous grouting pipes 300 may be distributed in multiple rows and multiple columns. When more than 2 continuous grouting pipes 300 are simultaneously grouted in the longitudinal direction, the grouting pipes can be more fully filled in wall cracks, a grouting protective layer with a larger protective area is formed, and the waterproof and anticorrosion capabilities are improved.
According to the protection structure, the using method and the construction method of the prefabricated double-skin superposed wall and the UHPC post-cast wall body provided by the embodiment of the invention, the continuous grouting pipe 300 is arranged in the wall body of the interface between the wall body 110 of the prefabricated double-skin superposed wall 100 and the UHPC post-cast wall body 150, so that when cracks or possible cracks are generated in the wall body of the interface between the wall body 110 of the prefabricated double-skin superposed wall 100 and the UHPC post-cast wall body 150, grout is injected through the continuous grouting pipe 300 at a certain pressure, and the grout flows along the horizontal direction of the wall body of the interface and flows into the cracks of the wall body through the unidirectional flowing grouting holes 310, so that a grouting protection layer is formed in the wall body of the interface. On one hand, corrosive substances such as sewage and the like are prevented from permeating into the wall body of the interface through the crack to cause corrosion to the wall body reinforcing steel bars through the grouting protective layer in the wall body, so that the waterproof and anticorrosion capabilities of the interface wall body are improved. On the other hand, the crack is filled, so that the repair of the shrinkage crack in the UHPC post-cast section wall body is realized, and the service life of the wall body with the interface is prolonged.
According to the construction method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body provided by the embodiment of the invention, the waterproof coating is coated on the surface of the wall body of the interface of the wall body 110 of the prefabricated double-skin superposed wall 100 and the UHPC post-cast section wall body 150, so that the waterproof capability of the wall body of the interface at the joint and the whole surface of the wall body is improved, water is prevented from permeating steel bars in the wall body to corrode the steel bars, and the phenomenon that the wall body is cracked in a large area due to overlong soaking time when the wall body of the interface is used in a water environment is prevented. The waterproof adhesive tape 500 is sealed on the wall surface of the interface between the wall 110 of the prefabricated double-skin laminated wall 100 and the UHPC post-cast section wall 150, so that an external protection is added, when the waterproof coating fails, the waterproof adhesive tape 500 prevents corrosive substances such as sewage and the like from permeating into the wall steel bars to corrode the steel bars, the waterproof and anticorrosion capabilities of the interface wall at the joint are enhanced, and the function of harmful medium invasion is mainly achieved. The grouting protection layer is formed by grouting the continuous grouting pipe 300, so that when the protection capability of the waterproof adhesive tape 500 fails, corrosive substances such as sewage and the like are prevented from permeating into the wall steel bars through the grouting protection layer in the wall body to corrode the steel bars, and the waterproof and anticorrosion capabilities of the interface wall body at the joint are further enhanced. And the grouting protective layer can be formed in batches from outside to inside along the upstream surface of the wall body, and after the first grouting protective layer fails, the next grouting protective layer plays a role in water resistance and corrosion resistance. The continuous type slip casting pipe 300 is grouted in batches along the upstream face of the wall body from outside to inside through the continuous type slip casting pipe 300 to form a grouting protective layer, a multilayer protective line is established from this, then corrosive substances break through the protective line of one layer, the grouting protective layer is built in the wall body to form a next protective line after the slip casting of the continuous type slip casting pipe 300 from outside to inside, the positions of corrosive substances such as water resistance and the like penetrating into the wall body reinforcing steel bars are continuously blocked, and the corrosive substances slowly reach the position of the wall body reinforcing steel bars. Thereby blocking the speed of corrosive substances such as sewage and the like gradually permeating the reinforcing steel bars in the wall body of the interface surface from outside to inside and prolonging the protection period. Namely, the embodiment of the invention realizes the purpose of long-term water resistance and corrosion resistance through the external protective layer consisting of the waterproof coating and the waterproof adhesive tape and the internal protective layer consisting of the grouting protective layer. The continuous grouting pipe 300 is used for subsequent multiple internal protection, and can be used for regularly and sequentially grouting into the continuous grouting pipe 300 from outside to inside according to the wall structure health detection result in the operation process, filling cracks possibly occurring at the interface and forming a grouting protection layer.
The protection structure, the use method and the construction method of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body provided by the embodiment of the invention improve the waterproof and anticorrosive capabilities of the interface wall body at the joint, and prevent corrosive substances such as sewage and the like from permeating into the steel bars in the wall body to corrode the steel bars, and the waterproof water soaks the interface wall body to cause the phenomenon that the wall body cracks in a large area.
The protection structure, the use method and the construction method of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body provided by the embodiment of the invention are suitable for use environments of sewage treatment plants and the like, and have a long-acting protection effect. When one continuous grouting pipe 300 is blocked, grouting can be performed through other continuous grouting pipes 300 to form a grouting protective layer.
The present invention is not limited to the above-described specific embodiments, and it is apparent that the above-described embodiments are some, not all, of the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention. Other levels of modification and variation of the present invention may be made by those skilled in the art. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims.
Claims (10)
1. The utility model provides a protection structure of prefabricated double skin coincide wall and UHPC post-cast segment wall body which characterized in that includes:
and the continuous grouting pipe is horizontally arranged in a wall body of an interface between the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body and is exposed out of two ends of the wall body, and grouting holes which are communicated in a one-way mode from inside to outside are arranged on the continuous grouting pipe at preset intervals.
2. The protective structure for the prefabricated double-skin superposed wall and the UHPC post-cast wall as claimed in claim 1, wherein the continuous grouting pipes are a plurality of independent grouting pipes, and the plurality of continuous grouting pipes are sequentially arranged from outside to inside on the upstream surface of the wall with the interface.
3. The protective structure for the prefabricated double-skin superposed wall and the UHPC post-cast wall as claimed in claim 2, wherein more than 2 continuous grouting pipes are arranged in the wall body of the interface of each side wall body of the prefabricated double-skin superposed wall and the UHPC post-cast wall body.
4. The protective structure for the prefabricated double-skin laminated wall and the UHPC post-cast wall body according to claim 1, further comprising:
and the waterproof adhesive tape is sealed and arranged on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body.
5. The protective structure for the prefabricated double-skin laminated wall and the UHPC post-cast wall body according to claim 4, further comprising:
and the waterproof coating is coated on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body, and the waterproof coating is positioned on the inner side and/or the outer side of the waterproof adhesive tape.
6. A use method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast wall body is characterized in that when a crack is generated on the wall body of the interface of the prefabricated double-skin superposed wall and the UHPC post-cast wall body, slurry is injected into the crack of the wall body from outside to inside along the water facing surface of the interface wall body at a certain pressure in batches through at least one of a plurality of continuous grouting pipes, and flows along the horizontal direction of the interface wall body through a unidirectional-flow grouting hole so as to form a grouting protective layer in the wall body of the interface.
7. The use method of the protective structure of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body is characterized in that waterproof adhesive tapes are sealed and arranged on the wall body surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body.
8. The use method of the protective structure of the prefabricated double-skin overlapped wall and the UHPC post-cast wall body is characterized in that a waterproof coating is coated on the wall body surface of the interface of the wall body of the prefabricated double-skin overlapped wall and the UHPC post-cast wall body, and the waterproof coating is coated on the inner side and/or the outer side of the waterproof adhesive tape.
9. A construction method for a protective structure of a prefabricated double-skin superposed wall and a UHPC post-cast section wall is characterized by comprising the following steps:
the lower end of a wall body of the prefabricated double-skin superposed wall is provided with a plurality of continuous grouting pipes for independent grouting along the horizontal direction and exposed out of two ends of the wall body, the continuous grouting pipes are sequentially arranged from outside to inside from the upstream surface of the wall body of an interface, and each continuous grouting pipe is provided with grouting holes which are communicated in a one-way mode from inside to outside at intervals;
hoisting and binding self-supporting anchor bars of the prefabricated double-skin composite wall on floor anchor bars of a floor slab;
erecting a post-pouring section side template at the interface of the prefabricated double-skin composite wall and the floor slab and pouring UHPC to a specified height to form a UHPC post-pouring section wall body so as to finish the assembly and connection of the prefabricated double-skin composite wall and the floor slab node;
erecting a prefabricated double-skin superposed wall inter-wall side mold, and pouring concrete between the double-skin superposed walls to form a core-filled concrete inner wall;
sealing and arranging a waterproof adhesive tape on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall body;
and (3) coating a waterproof coating on the wall surface of the interface of the wall body of the prefabricated double-skin superposed wall and the UHPC post-cast section wall, wherein the waterproof coating is positioned on the inner side and/or the outer side of the waterproof adhesive tape.
10. The method for constructing a protective structure between a prefabricated double-skin laminated wall and a UHPC post-cast wall body according to claim 9, wherein the continuous grouting pipe is arranged on the lower surface and the inner surface of the lower end of the prefabricated double-skin laminated wall body and/or between the wall bodies of the double-skin laminated wall body.
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