CN112211319A - Same-layer grouting method for mounting prefabricated shear wall of fabricated building - Google Patents
Same-layer grouting method for mounting prefabricated shear wall of fabricated building Download PDFInfo
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- CN112211319A CN112211319A CN202011091338.4A CN202011091338A CN112211319A CN 112211319 A CN112211319 A CN 112211319A CN 202011091338 A CN202011091338 A CN 202011091338A CN 112211319 A CN112211319 A CN 112211319A
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- grouting
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- prefabricated shear
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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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
- 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
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
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- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a method for grouting an installation layer of a prefabricated shear wall of an assembly type building, which comprises the following steps: hoisting the prefabricated shear wall to a position to be installed and installing; arranging a plurality of inclined struts on the inner wall surface of the prefabricated shear wall; after the elevation and the verticality of the prefabricated shear wall are approved, arranging a circle of plugging base mortar at a horizontal joint between the bottom of the prefabricated shear wall and the working floor; a grouting sleeve is pre-embedded in the prefabricated shear wall, the lower end part of the grouting sleeve is communicated with the closed cavity, and grouting materials are injected into the closed cavity and the grouting sleeve through the grouting sleeve; constructing and forming cast-in-situ restrained end columns connected with the prefabricated shear wall at two ends of the prefabricated shear wall; and installing and constructing a top plate structure body on the upper parts of the prefabricated shear wall and the cast-in-place restrained end post. The invention has the advantages that: the horizontal joint, the sleeve inner grouting and post-pouring constraint column and the top plate structure concrete can be synchronously finished as floors, and the structural design calculation model is more met.
Description
Technical Field
The invention belongs to the field of an assembled integral concrete structure building, and particularly relates to a same-layer grouting method for mounting prefabricated shear walls of an assembled building.
Background
And (3) assembling the prefabricated shear wall system with the integral concrete structure, after the prefabricated shear wall is installed, pouring concrete on the same layer or pouring concrete on n-3 layers (n is the current hoisting floor) to perform the operation of pouring internal slurry at the bottom of the prefabricated shear wall and into the sleeve, wherein n-5 or more concrete is obtained in the actual execution.
The main construction process sequence of the traditional precast shear wall structure system and the floor structure construction is as follows: positioning and lofting the floor of an operation floor → placing leveling pads at the bottom of the prefabricated shear wall → hoisting the prefabricated shear wall → installing diagonal braces → approving the elevation and the verticality of the prefabricated shear wall → binding and sealing the reinforcing steel bars of the cast-in-place restrained end posts → erecting the horizontal floor bent frames and paving the templates → installing the laminated floor slab → binding the reinforcing steel bars and the reinforcing steel bars of the upper floor and the beam → concreting the floor and the cast-in-place wall → constructing the structure of the upper floor again → returning to the n-3 floor to perform the bottom sealing and grouting of the prefabricated shear wall → grouting operation.
In the operation flow, horizontal joints, grouting in the sleeve, post-pouring of the concrete of the constraint column and the top plate structure are not completed synchronously when floors are finished, and a structural design calculation model is not met; the axial force of the horizontal joint of the prefabricated shear wall is calculated according to one-time loading, and the grouting does not accord with the design; when the sleeve is grouted, if the conditions such as bin explosion or blockage occur, the prefabricated part cannot be pulled up and washed, and the grouting quality cannot be ensured; since the bottoms of the n-3 layers of prefabricated shear walls and the sleeves are not grouted, the upper and lower inclined struts of the prefabricated shear walls cannot be detached, the inclined strut amount of the prefabricated shear walls of at least three floors needs to be prepared, and the inclined struts of the prefabricated shear walls and the bent struts are positioned in the same floor space, so that the operation on a construction site is not facilitated; the construction difficulty becomes high and the corresponding cost is increased. The traditional construction process cannot better solve the conformance of design and field construction, and cannot ensure the quality control of the construction process.
Disclosure of Invention
The invention aims to provide a same-floor grouting method for mounting prefabricated shear walls of an assembly type building according to the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a same-layer grouting method for mounting prefabricated shear walls of fabricated buildings is characterized by comprising the following steps:
(1) hoisting the prefabricated shear wall to a position to be installed on the working floor surface and installing;
(2) a plurality of inclined struts are arranged on the inner wall surface of the prefabricated shear wall and used for adjusting the verticality of the prefabricated shear wall, one ends of the inclined struts are connected to the prefabricated shear wall, and the other ends of the inclined struts are connected to the working floor surface;
(3) after the elevation and the verticality of the prefabricated shear wall are approved, arranging a circle of plugging base mortar at a horizontal joint between the bottom of the prefabricated shear wall and the working floor; the plugging seat slurry, the bottom surface of the prefabricated shear wall and the floor of the operation floor jointly enclose to form a closed cavity;
(4) grouting sleeves are pre-buried in the prefabricated shear wall, the lower end parts of the grouting sleeves are communicated with the closed cavity, and grouting materials are injected into the closed cavity and the grouting sleeves through the grouting sleeves;
(5) after the grouting operation of the closed cavity at the bottom of the prefabricated shear wall and the grouting sleeve is completed, binding reinforcing steel bars of cast-in-situ restrained end posts at two ends of the prefabricated shear wall, packaging templates, and constructing to form the cast-in-situ restrained end posts connected with two ends of the prefabricated shear wall;
(6) installing and constructing a top plate structure body on the prefabricated shear wall and the upper part of the cast-in-place restrained end post;
(7) and (5) repeating the steps (1) to (6) to construct the next floor structure.
The prefabricated shear wall comprises a prefabricated shear wall body and a grouting sleeve, wherein a single-row or double-row quincunx-shaped lower connecting steel bar is reserved at the installation position of the prefabricated shear wall body on the working floor surface, the grouting sleeve is preset at the bottom of the prefabricated shear wall body, the prefabricated shear wall body is hoisted to the working floor surface, the lower connecting steel bar extends into the grouting sleeve, and an upper connecting steel bar extending into the prefabricated shear wall body is further arranged in the grouting sleeve.
The upper part and the lower part of the grouting sleeve are respectively provided with a grouting pipeline and a grout outlet pipeline which are inclined upwards and extend out of the prefabricated shear wall; the inclined angle between the grouting pipeline and the horizontal plane is 15-30 degrees, and the inclined angle between the grout outlet pipeline and the horizontal plane is 30-45 degrees.
The bottom surface of the prefabricated shear wall is provided with a diversion trench, and the section of the diversion trench is in a trapezoidal shape with a narrow top and a wide bottom.
And the air duct is arranged in the closed cavity and extends out of the prefabricated shear wall, and is used for discharging the gas in the closed cavity and the gas in the grouting material when the grouting material is poured into the grouting sleeve and the closed cavity.
A one-way check valve is arranged at the end part of the grouting pipeline, which is positioned on the inner side surface of the prefabricated shear wall; when grouting materials are poured into the grouting sleeve, a grouting head of a grouting machine extends into the grouting pipeline to open the one-way check valve for grouting material injection; and after grouting is finished, the grouting head is drawn out of the grouting pipeline, and the one-way check valve is automatically closed.
The grout outlet of the grouting sleeve is of an L-shaped structure and comprises a horizontal channel and a vertical channel which is vertically bent upwards from the end part of the horizontal channel, and the upper part of the vertical channel is communicated with the grout outlet pipeline.
The invention has the advantages that:
(1) the same-layer grouting for the installation of the prefabricated shear wall of the fabricated building is realized;
(2) the concrete with horizontal joints, sleeve internal grouting, post-pouring restraint columns and top plate structures can be synchronously finished on the same floor, and a structural design calculation model is more met;
(3) the axial force of the horizontal joint of the prefabricated shear wall is calculated according to one-time loading, and the same-layer grouting is more consistent with the design;
(4) when the grouting cylinder is used for grouting, if the conditions such as bin explosion or blockage occur, the prefabricated part can be timely pulled up and then washed and grouted again;
(5) the prefabricated shear wall lower part short diagonal brace can be disassembled after 24 hours of grouting, and the prefabricated shear wall upper diagonal brace can be disassembled after the floor post-cast constraint column and the top plate structure concrete are poured, so that the site construction operation is facilitated;
(6) the method has the advantages that the operation difficulty is reduced, the operation flows of all the procedures of the structure construction are more reasonably connected, the construction progress is accelerated, and meanwhile, the cost is saved.
Drawings
FIG. 1 is a schematic diagram of grouting of the same layer of the prefabricated shear wall according to the invention;
FIG. 2 is a schematic structural view of a grout sleeve according to the present invention;
FIG. 3 is a schematic structural view of a grouting pipe according to the present invention;
FIG. 4 is a perspective view of the same layer grouting of the precast shear wall of the present invention;
fig. 5 is a schematic view of a cast-in-place restrained end post arranged on the working floor of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-5, the symbols in the figures are: the prefabricated shear wall comprises a prefabricated shear wall 1, upper connecting steel bars 2, an air duct 3, a grout outlet pipeline 4, a grouting sleeve 5, a grouting pipeline 6, plugging base grout 7, an inner wall waterproof layer 8, an outer wall waterproof layer 9, a lower-layer prefabricated shear wall 10, a diversion trench 11, a closed cavity 12, lower connecting steel bars 13, a lower-layer cast-in-place concrete slab 14, a lower-layer prefabricated composite slab 15, a grout outlet 16, a one-way check valve 17, a grouting head 18, an inclined strut 19, an operation floor 20 and a cast-in-place restraining end column 21.
Example (b): as shown in fig. 1 to 5, the present embodiment specifically relates to a same-floor grouting method for mounting prefabricated shear walls of an assembly type building, which includes the following steps:
(1) positioning and lofting the installation position of the prefabricated shear wall 1 on the operation floor surface 20; placing a leveling gasket at the installation position; hoisting the prefabricated shear wall 1 to a position to be installed on the working floor surface 20 and installing; during the hoisting process, a single row or double rows of quincunx-shaped lower connecting steel bars 13 are reserved at the installation position of the prefabricated shear wall 1 on the working floor surface 20, the grouting sleeve 5 is preset at the bottom of the prefabricated shear wall 1, during the hoisting process of the prefabricated shear wall 1 on the working floor surface 20, the lower connecting steel bars 13 extend into the grouting sleeve 5, and the upper connecting steel bars 2 at the upper part of the prefabricated shear wall 1 also extend into the grouting sleeve 5.
(2) The inner wall surface of the prefabricated shear wall 1 is provided with a plurality of inclined struts 19 in a supporting manner, and the perpendicularity of the prefabricated shear wall 1 is adjusted by adjusting the supporting angles of the inclined struts 19, wherein one ends of the inclined struts 19 are fixedly connected to the inner wall surface of the prefabricated shear wall 1, and the other ends of the inclined struts are fixedly connected to the operation floor surface 20.
(3) After the elevation and the verticality of the prefabricated shear wall 1 are adjusted and approved, arranging a circle of plugging base mortar 7 at a horizontal joint between the bottom of the prefabricated shear wall 1 and the working floor surface 20; the plugging seat slurry 7, the bottom surface of the prefabricated shear wall 1 and the operation floor surface 20 jointly enclose to form a closed cavity 12. The working floor 20 in this embodiment is formed by combining a lower precast composite slab 15 and a lower cast-in-place concrete slab 14, and a lower precast shear wall 10 is arranged below the working floor 20.
(4) And after the strength of the plugging base slurry 7 meets the requirement, grouting material is poured into the grouting sleeve 5 and the closed cavity 12 in the prefabricated shear wall 1, so that the prefabricated shear wall 1 and the operation floor surface 20 are connected and fixed into an integral structure.
A plurality of grouting sleeves 5 are arranged in the prefabricated shear wall 1 at intervals, the grouting sleeves 5 are full grouting sleeves or half grouting sleeves, and the lower end parts of the grouting sleeves 5 are communicated with the closed cavity 12. When the grouting sleeve 5 is erected, a grouting opening is arranged close to the side edge of the lower end of the cylinder body and communicated with a grouting pipeline 6, a grout outlet 16 is arranged close to the side edge of the upper end of the cylinder body and communicated with a grout outlet pipeline 4, and a grout leakage prevention adhesive tape is arranged at the grout outlet 16; as shown in fig. 2, in this embodiment, the structure at the position of the grout outlet 16 is optimized to be in an "L" shape, and includes a horizontal channel and a vertical channel bent upward from the end of the horizontal channel, the upper portion of the vertical channel is communicated with the grout outlet pipe 4, grout flows in an L shape in the pipe wall of the grout outlet 16 of the grouting sleeve 5, and grout is discharged from the upper portion to increase the grouting fullness at the position of the grout outlet 16.
The grouting pipeline 6 is inclined at a certain angle to avoid slurry backflow, the inclination angle is preferably 15-30 degrees, and one end of the grouting pipeline 6 is bonded with a grouting opening of the grouting sleeve 5 by using quick-setting glue to ensure that slurry does not leak; the other end of the grouting pipe 6 extends to the inner side wall surface of the prefabricated shear wall 1 from the grouting opening of the grouting sleeve 5 and is flush with the inner side wall surface of the prefabricated shear wall 1, the grouting pipe and the grouting sleeve 5 are pre-embedded in the prefabricated shear wall 1, and the grouting pipe and the prefabricated shear wall 1 are produced together and formed at one time; in addition, as shown in fig. 3, a one-way check valve 17 is provided at the port of the grouting pipe 6, when the grouting pipe 6 is externally connected with a grouting machine for grouting, a grouting head 18 of the grouting machine extends into the grouting pipe 6 and opens the one-way check valve 17 for grouting, after grouting is finished, the grouting head 18 of the grouting machine is drawn out, and the one-way check valve 17 is left in the grouting pipe 6 and closed to timely block the grouting material which is not solidified in the grouting pipe 6 and ensure that the grouting liquid level does not drop.
The grout outlet pipeline 4 is inclined at a certain angle of 30-45 degrees so that grout can flow back into the grouting sleeve 5 to improve grouting fullness, and the joint of one end of the grout outlet pipeline 4 and the grout outlet 16 of the grouting sleeve 5 is bonded by quick-setting glue so as to ensure that no grout leakage occurs; the other end of the slurry outlet pipeline 4 extends to the inner side wall surface of the prefabricated shear wall 1 and is flush with the inner side wall surface, the slurry outlet pipeline 4 and the grouting sleeve 5 are pre-embedded in the prefabricated shear wall 1, and the slurry outlet pipeline and the prefabricated shear wall 1 are produced together and formed in one step; when grouting, the liquid level rises after the grouting sleeve 5 is grouted, and when the slurry reaches the slurry outlet 16, the slurry can continuously rise along the slurry outlet pipe 4 until the slurry flows out from the upper part of the slurry outlet pipe 4 and flows out in a columnar shape, and the slurry is blocked by using a special plug.
An air duct 3 is also embedded in the precast shear wall 1, one end of the air duct 3 is communicated with the closed cavity 12, and the other end extends to the inner side wall surface of the precast shear wall 1, so as to discharge air in the closed cavity 12 and redundant air in slurry during grouting.
It should be noted that the bottom of the precast shear wall 1, that is, the upper portion of the closed cavity 12, is provided with a diversion trench 11, a cross section of the diversion trench 11 is in a trapezoidal shape with a narrow top and a wide bottom, and the diversion trench 11 is provided to facilitate the flow of the grouting material in the closed cavity 12. The diversion trench 11 and the prefabricated shear wall 1 are formed in one step by matching with a trapezoidal die during production.
An outer wall waterproof layer 9 is arranged on the outer side of the horizontal joint, the whole waterproof layer which is 3-5mm thick, has certain strength and elasticity and strong bonding property between the inner surface and the outer surface of the waterproof layer and concrete or mortar is formed, and the outer wall waterproof layer 9 covers the lower part of the prefabricated shear wall 1, the plugging base mortar 7 at the horizontal joint and the upper part of the lower prefabricated shear wall 10; in addition, the inner side of the horizontal joint is provided with an inner wall waterproof layer 8 which comprises an inner side round angle and a waterproof layer with the thickness of 2 mm.
(5) After grouting operation of the prefabricated shear wall 1 is completed, binding reinforcing steel bars of the cast-in-situ restrained end posts 21 at two ends of the prefabricated shear wall, packaging templates, and constructing to form the cast-in-situ restrained end posts 21 connected with the two ends of the prefabricated shear wall 1; the cast-in-situ restrained end post 21 comprises a vertical main rib, a horizontal stirrup and a horizontal rib extending out of two ends of the prefabricated shear wall, the cast-in-situ restrained end post 21 is formed after concrete is poured through two side supporting templates, and then a shear system is formed together with the prefabricated shear wall 1 after grouting.
(6) Installing and constructing a roof structure body 21 on the upper parts of the prefabricated shear wall 1 and the cast-in-place restrained end post 21, comprising: the prefabricated composite slab, the cast-in-situ laminated layer on the upper part of the composite slab and the cast-in-situ part on the upper part of the prefabricated shear wall, which is connected with the floor slab part, are arranged on the prefabricated shear wall.
(7) And (5) repeating the steps (1) to (6) to construct the next floor structure.
The beneficial effect of this embodiment lies in: the concrete with horizontal joints, sleeve internal grouting, post-pouring restraint columns and top plate structures can be synchronously finished on the same floor, and a structural design calculation model is more met; the axial force of the horizontal joint of the prefabricated shear wall is calculated according to one-time loading, and the same-layer grouting is more consistent with the design; when the sleeve is grouted, if the conditions such as bin explosion or blockage occur, the prefabricated part can be timely pulled up and then washed and grouted again; after 24 hours after grouting, the short diagonal brace at the lower part of the prefabricated shear wall can be disassembled, and after the floor post-cast constraint column and the top plate structure concrete are poured, the diagonal brace at the upper part of the prefabricated shear wall can be disassembled, so that the site construction operation is facilitated; the operation difficulty is reduced, the operation flows of all the procedures of the structure construction are more reasonably connected, and the cost is saved.
Claims (7)
1. A same-layer grouting method for mounting prefabricated shear walls of fabricated buildings is characterized by comprising the following steps:
(1) hoisting the prefabricated shear wall to a position to be installed on the working floor surface and installing;
(2) a plurality of inclined struts are arranged on the inner wall surface of the prefabricated shear wall and used for adjusting the verticality of the prefabricated shear wall, one ends of the inclined struts are connected to the prefabricated shear wall, and the other ends of the inclined struts are connected to the working floor surface;
(3) after the elevation and the verticality of the prefabricated shear wall are approved, arranging a circle of plugging base mortar at a horizontal joint between the bottom of the prefabricated shear wall and the working floor; the plugging seat slurry, the bottom surface of the prefabricated shear wall and the floor of the operation floor jointly enclose to form a closed cavity;
(4) grouting sleeves are pre-buried in the prefabricated shear wall, the lower end parts of the grouting sleeves are communicated with the closed cavity, and grouting materials are injected into the closed cavity and the grouting sleeves through the grouting sleeves;
(5) after the grouting operation of the closed cavity at the bottom of the prefabricated shear wall and the grouting sleeve is completed, binding reinforcing steel bars of cast-in-situ restrained end posts at two ends of the prefabricated shear wall, packaging templates, and constructing to form the cast-in-situ restrained end posts connected with two ends of the prefabricated shear wall;
(6) installing and constructing a top plate structure body on the prefabricated shear wall and the upper part of the cast-in-place restrained end post;
(7) and (5) repeating the steps (1) to (6) to construct the next floor structure.
2. The method as claimed in claim 1, wherein a single row or double row of quincunx-shaped lower connecting steel bars are reserved at the installation position of the prefabricated shear wall on the working floor surface, the grouting sleeve is preset at the bottom of the prefabricated shear wall, and during the process of hoisting the prefabricated shear wall to the working floor surface, the lower connecting steel bars extend into the grouting sleeve, and the grouting sleeve is also internally provided with upper connecting steel bars extending into the prefabricated shear wall.
3. The method for grouting the same layer for the prefabricated shear wall installation of the fabricated building as claimed in claim 2, wherein the upper part and the lower part of the grouting sleeve are respectively provided with a grouting pipeline and a grout outlet pipeline which are inclined upwards and extend out of the prefabricated shear wall; the inclined angle between the grouting pipeline and the horizontal plane is 15-30 degrees, and the inclined angle between the grout outlet pipeline and the horizontal plane is 30-45 degrees.
4. The method for grouting the same layer as the prefabricated shear wall for the prefabricated building according to claim 1, wherein a diversion trench is formed in the bottom surface of the prefabricated shear wall, and the diversion trench has a trapezoidal section with a narrow top and a wide bottom.
5. The method for grouting the same installation layer of the prefabricated shear wall for the fabricated building as claimed in claim 1, wherein an air duct is arranged in the closed cavity and extends out of the prefabricated shear wall, and the air duct is used for exhausting air in the closed cavity and air in the grouting material when the grouting sleeve and the closed cavity are filled with the grouting material.
6. The method for grouting the same layer for mounting the prefabricated shear wall of the fabricated building as claimed in claim 1, wherein the grouting pipe is provided with a one-way check valve at the end part on the inner side surface of the prefabricated shear wall; when grouting materials are poured into the grouting sleeve, a grouting head of a grouting machine extends into the grouting pipeline to open the one-way check valve for grouting material injection; and after grouting is finished, the grouting head is drawn out of the grouting pipeline, and the one-way check valve is automatically closed.
7. The method for grouting the same installation layer of the prefabricated shear wall of the fabricated building as claimed in claim 3, wherein the grout outlet of the grout sleeve is of an L-shaped structure and comprises a horizontal channel and a vertical channel bent vertically and upwards from the end of the horizontal channel, and the upper part of the vertical channel is communicated with the grout outlet pipeline.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456226A (en) * | 2020-04-17 | 2020-07-28 | 温州坤睿建设工程有限公司 | Light steel energy-saving prefabricated house and construction method thereof |
| CN113063622A (en) * | 2021-03-16 | 2021-07-02 | 中南建筑设计院股份有限公司 | Quality detection method for slurry layer of assembled shear wall |
| CN113404170A (en) * | 2021-06-18 | 2021-09-17 | 中国建筑第八工程局有限公司 | Waterproof structure at joint of prefabricated outer wall and cast-in-place floor slab and construction method thereof |
| CN113802615A (en) * | 2021-08-20 | 2021-12-17 | 北京工业大学 | Underground assembly superposed shear wall waterproof structure |
| CN114235028A (en) * | 2022-01-24 | 2022-03-25 | 上海市建筑科学研究院有限公司 | Method for detecting disturbance of same-layer instant grouting component caused by subsequent construction |
| CN114232787A (en) * | 2021-12-28 | 2022-03-25 | 中国建筑第二工程局有限公司 | Building continuous assembly method capable of avoiding wall body deflection and assembly type building |
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