CN114562071A - Grouting joint bar compaction grouting sleeve precast concrete column and construction method - Google Patents
Grouting joint bar compaction grouting sleeve precast concrete column and construction method Download PDFInfo
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- CN114562071A CN114562071A CN202210278452.0A CN202210278452A CN114562071A CN 114562071 A CN114562071 A CN 114562071A CN 202210278452 A CN202210278452 A CN 202210278452A CN 114562071 A CN114562071 A CN 114562071A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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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
- 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
- E04C5/18—Spacers of metal or substantially of metal
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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)
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- Structural Engineering (AREA)
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- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a grouting dowel bar compaction grouting sleeve precast concrete column and a construction method, the column comprises a plurality of sections of precast concrete columns which are connected up and down, the top of each precast concrete column is provided with a round steel tube sleeve and a grouting sleeve, the side surface of each precast concrete column is provided with a grouting port and a grout outlet which are communicated with the inner cavity of each grouting sleeve, the bottom of each precast concrete column is protruded with a round steel tube concrete shear key and connecting steel bars, when the precast concrete columns are spliced, the round steel tube concrete shear key is inserted into the round steel tube sleeve, the connecting steel bars are inserted into the grouting sleeve, and the grouting sleeve and the round steel tube sleeve are filled with high-strength grouting material; the invention can ensure that the grouting materials in all the sleeves are filled compactly, and complex warehouse separation and pressure grouting links are not needed after the steel bars are inserted into the test piece sleeve, thereby greatly reducing the construction difficulty and quality risk of pressure grouting in the traditional mode, avoiding the defects of non-compact grouting holes and the like, and ensuring the safe and reliable transmission of the force at the connecting position.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a grouting joint bar compaction grouting sleeve precast concrete column and a construction method.
Background
At present, with the development of social economy and the acceleration of urbanization, the building area of China is continuously increased every year. The prefabricated building can break the limitation of the traditional house in the building process, and meanwhile, the construction quality and the safety and the stability of the building engineering can be effectively guaranteed through advanced technical means.
The assembly type building is a building formed by producing building prefabricated components in a building prefabricated component production factory and transporting the building prefabricated components to a project construction site for modularized installation. In the joint area of the prefabricated building, sleeve grouting is often adopted for connecting the prefabricated parts. However, the process is still not mature enough, the inner cavity of the sleeve is often not full in grouting, the grouting is not full, holes and the like exist, even no grouting material exists in the sleeve, and the connecting strength of the prefabricated parts has potential safety hazards.
At present, the grouting sleeve connection is one of the most main connection forms of a Precast Concrete (PC) assembled column, the splicing mode is that the connecting steel bar of the lower section of the column faces upwards, after a reinforced concrete floor slab is poured, the steel bar sleeve of the upper section of the column is sleeved downwards into the connecting steel bar, then the partition of pressure grouting and the periphery of the joint are sealed at the joint, and then a series of complex pressure grouting processes are carried out through a grouting hole. Once the grouting hole, the grout outlet hole or the sleeve is blocked or the sealed part leaks grout, the grouting defects such as incompact grouting and the like are easily formed in the sleeve. Because the defects are mostly positioned in the steel bar sleeve, the grouting defects in the sleeve are not comprehensively detected by a simple and effective detection means except destructive detection such as breaking and dismantling, and potential safety hazards such as insufficient bearing capacity of a connecting position are easily formed. The numerous grout holes of hookup location, in case there is not full defect problem such as slip casting, its construction operation's remedial measure is also unusual troublesome. Meanwhile, the connecting sections of the PC assembled columns are parallel and level, the new concrete and the old concrete may form a through seam due to the problems of interface or shrinkage and the like, and effective transverse shear-resistant measures are lacked.
Disclosure of Invention
The invention aims to provide a grouting dowel bar compaction grouting sleeve precast concrete column and a construction method, which are used for solving the problems in the prior art, can ensure that all grouting materials in sleeves are filled compactly, does not need to perform complicated warehouse separation and pressure grouting links after a test piece sleeve is inserted with a steel bar, greatly reduces the construction difficulty and quality risk of pressure grouting in the traditional mode, does not have the defects of incompact grouting cavity and the like, and ensures safe and reliable force transmission of a connecting position.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a grouting dowel bar compaction grouting sleeve precast concrete column, which comprises a plurality of sections of precast concrete columns which are connected up and down, wherein the top of each precast concrete column is provided with a round steel tube sleeve and a plurality of grouting sleeves, the side surface of each precast concrete column is provided with a grouting opening and a grout outlet which are respectively communicated with the inner cavities of the grouting sleeves, the bottom of each precast concrete column is protruded with a round steel tube concrete shear key corresponding to the round steel tube sleeve and connecting steel bars corresponding to the grouting sleeves one by one, the top of each connecting steel bar is connected with the bottom of the grouting sleeve, when each section of precast concrete column is spliced, the round steel tube concrete shear key protruded from the bottom of the upper section of precast concrete column is inserted into the round steel tube sleeve at the top of the lower section of precast concrete column, and the round steel tube concrete shear key and the round steel tube sleeve are connected into a whole by filling high-strength grouting material in the round steel tube sleeve, the connecting steel bars protruding from the bottom of the precast concrete column at the upper section are inserted into the top grouting sleeve of the precast concrete column at the lower section, and high-strength grouting material is filled in the grouting sleeve to connect the connecting steel bars and the grouting sleeve into a whole.
Preferably, the circular steel tube sleeve is arranged at the column center of the precast concrete column, and the grouting sleeve is arranged on the periphery of the circular steel tube sleeve.
Preferably, the round concrete filled steel tube shear key is arranged at the column center of the precast concrete column, and the connecting steel bars are arranged at the periphery of the round concrete filled steel tube shear key.
Preferably, a row of groove-shaped steel bars are embedded in the side face of the floor height of the precast concrete column, and the groove-shaped steel bars are connected with steel bars in a floor precast concrete floor slab or a cast-in-place floor slab.
Preferably, an internal thread high-strength sleeve is pre-embedded at the joint of the precast concrete column and the upper and lower rows of stressed steel bars of the frame beam, and the internal thread high-strength sleeve is connected with the stressed steel bars of the precast concrete column or is firmly anchored in the precast concrete column through anchoring steel bars; after the hoisting is finished, when the frame beam is installed, the connecting steel bars of the frame beam are connected with the precast concrete column through the internal thread high-strength sleeves at the corresponding positions.
Preferably, two opposite column corners at the top of the precast concrete column are provided with right-angle positioning angle steels.
Based on the grouting joint bar compaction grouting sleeve precast concrete column, the invention also provides a construction method of the grouting joint bar compaction grouting sleeve precast concrete column, which comprises the following steps:
1) the workers are responsible for checking and measuring the levelness of the top surface of the precast concrete column, and if the deviation exceeds the installation regulation, the levelness of the top surface is adjusted; fixing 2 right-angle positioning angle steels on opposite angles of the precast concrete column by using bolts; then taking down the grouting sleeve and the cap on the top surface of the circular steel tube sleeve, and checking the interior of the grouting sleeve, the grouting opening and the grout outlet by using a flashlight to ensure that the grouting sleeve is smooth and free of blockage; firstly, plugging a grouting opening and a grout outlet on the side surface of the precast concrete column by rubber plugs; according to the preparation proportion and the stirring requirement of the high-strength grouting material for the grouting sleeve, the grouting material is prepared, after stirring is completed and standing is carried out to eliminate bubbles, the interiors of the grouting sleeve and the circular steel tube sleeve are filled or lower than the interiors of the grouting sleeve and the circular steel tube sleeve by using a funnel or a pressure grouting pipe, the vacant volume of the grouting material to the top surface is smaller than the volume of the inserted connecting steel bar or circular steel tube concrete shear key, and after the connecting steel bar and the circular steel tube concrete shear key are inserted, the grouting material can fill the inner space of the grouting sleeve and the circular steel tube sleeve;
2) the other group of workers are responsible for hoisting the precast concrete column on the upper layer, the connecting steel bars of the precast concrete column face downwards, and the position of the lifting hook is adjusted during hoisting to ensure that the axis of the hoisted precast concrete column is vertical; after all grouting materials at the joint are filled, immediately hoisting and installing the precast concrete column, after the precast concrete column at the upper part is hoisted to the upper part of the precast concrete column at the lower part, aligning the bottom column corner of the precast concrete column at the upper part into two right-angle positioning angle steels at the opposite angle of the precast concrete column at the lower part, preventing the column body from inclining or rotating, slowly dropping the precast concrete column until the whole length of the convex part of the connecting steel bar is inserted into the grouting sleeve, and completely inserting all inner circular steel tube concrete shear keys of the precast concrete column at the upper part into the circular steel tube sleeve of the precast concrete column at the lower part, cleaning the grouting materials overflowing from the outside, fixing the precast concrete column and a floor slab on the ground by using inclined struts at two adjacent sides of the precast concrete column, and preventing the hardening strength of the grouting materials from being influenced after disturbance.
Preferably, the levelness of the top surface of the precast concrete column is adjusted by means of plastering or adding a gasket.
Preferably, if the grouting material pouring condition in a certain grouting sleeve needs to be checked, the grout outlet on the grouting sleeve is plugged by an L-shaped transparent plastic guide pipe, the top surface of the L-shaped plastic pipe is not closed and is directly communicated with the atmosphere, and the height of the top surface is higher than the joint of the precast concrete column; when the whole length of the connecting steel bar is inserted into the interior of the grouting sleeve, whether the liquid level of the grouting material in the L-shaped transparent plastic guide pipe is level with the seam or not is checked.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) the conventional connection method is easy to cause grouting incompact, and an effective means is lacked for carrying out nondestructive testing on the grouting condition in the sleeve. The mode of grouting first and then inserting the steel bars can ensure that all grouting materials in the sleeves are filled compactly, complex warehouse separation and pressure grouting links are not needed after the steel bars are inserted into the test piece sleeves, the construction difficulty and quality risk of pressure grouting in the traditional mode are greatly reduced, the defects of incompact grouting holes and the like are avoided, and the force transmission of the connecting position is ensured to be reliable.
(2) The joint position of the traditional prefabricated column is at the bottom surface of the column (the top surface of the floor slab), which is often the position (control section) with the maximum bending moment of the column, and the bearing capacity requirement of the spliced connection is also the maximum. The joint position of the upper and lower columns is above the top surface of the floor and is close to the position of the inter-layer recurved bend of the columns, so that the influence of the inter-layer bending moment of the prefabricated columns on the joint can be greatly reduced, and the design and construction difficulty is reduced.
(3) The installation accuracy of the upper and lower layer cylinders when the steel bars are inserted is ensured by utilizing the positioning angle steel, after the connecting steel bars are all inserted into the grouting material in the sleeve, the surfaces of the upper and lower layer cylinders are aligned up and down on the same plane, and the prefabricated column does not need to be corrected or adjusted.
(4) The inside circular steel tube that utilizes upper and lower column end plays the effect of strengthening prefabricated column joint, and the four directions of steel pipe side are evenly arranged the peg along length, and after the grout in the circular steel tube concrete shear key all inserted the sleeve, strengthen being connected of steel pipe and concrete, convex circular steel tube section plays the effect of shearing that increases seam crossing as the measure of shearing.
(5) Need the closely knit condition of grout material in the spot check sleeve, only need the transparent guide arm of the play thick liquid hole position installation L type of going up, can clearly look over the reinforcing bar and insert the back, the inside grout liquid level height of sleeve. Convenient operation and extremely low inspection cost.
(6) The prefabricated slab or the embedded groove-shaped steel bar is prefabricated at the floor height position of the prefabricated column, and is conveniently connected with a prefabricated slab of a floor slab or steel bars in a cast-in-place reinforced concrete slab. The frame beam stress steel bars are connected with the external steel bars through the internal thread connecting sleeves embedded in the columns, so that the connection is convenient, and the stacking and the transportation of the prefabricated columns are convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a splicing state of two sections of precast concrete columns of a grouting joint bar compaction grouting sleeve precast concrete column in the invention;
FIG. 2 is a schematic diagram of a splicing structure of a circular steel tube sleeve and a circular steel tube concrete shear key according to the invention;
FIG. 3 is a schematic structural view of a grout sleeve according to the present invention;
in the figure: the concrete grouting device comprises a prefabricated concrete column 1, a 2-round steel tube sleeve, a 3-grouting sleeve, a 4-grouting opening, a 5-grout outlet, a 6-round steel tube concrete shear key, a 7-connecting steel bar, an 8-channel steel bar, a 9-rubber plug, a 10-L type transparent plastic guide tube, an 11-internal thread high-strength sleeve, a 12-right-angle positioning angle steel, a 13-stud and a 14-high-strength grouting material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a grouting joint bar compaction grouting sleeve precast concrete column and a construction method thereof, and aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The grout dowel steel crowded dense grouting sleeve precast concrete column in the embodiment, as shown in fig. 1-3, including the precast concrete column 1 of connecting from top to bottom of the multistage, the top of precast concrete column 1 is provided with circular steel tube sleeve 2 and a plurality of grouting sleeve 3, the side of precast concrete column 1 is provided with the communicating grout mouth 4 and grout outlet 5 with each grouting sleeve 3 inner chamber respectively, the bottom of precast concrete column 1 protrudes has circular steel tube concrete shear key 6 corresponding with circular steel tube sleeve 2 and connecting reinforcement 7 corresponding with each grouting sleeve 3 one-to-one, the bottom of grouting sleeve 3 is connected at the top of connecting reinforcement 7, when splicing each section of precast concrete column 1, the circular steel tube concrete shear key 6 protruding from the bottom of the precast concrete column 1 at the upper section is inserted into the circular steel tube sleeve 2 at the top of the precast concrete column 1 at the lower section, the circular steel tube sleeve 2 is filled with high-strength grouting material 14 to connect the circular steel tube concrete shear key 6 and the circular steel tube sleeve 2 into a whole The body, the convex connecting reinforcement 7 in bottom of the precast concrete post 1 of upper segment inserts in the top grout sleeve 3 of the precast concrete post 1 of hypomere, is full of the grout material that excels in grout sleeve 3 and connects into whole with connecting reinforcement 7 and grout sleeve 3.
In the embodiment, the circular steel tube sleeve 2 is arranged at the center of the precast concrete column 1, and the grouting sleeve 3 is arranged on the periphery of the circular steel tube sleeve 2; the round steel tube concrete shear key 6 is arranged at the column center of the precast concrete column 1, and the connecting steel bars 7 are arranged on the periphery of the round steel tube concrete shear key 6; the circular steel tube sleeve 2 and the circular steel tube concrete shear key 6 are connected with the precast concrete column 1 through the stud 13.
In the embodiment, a row of groove-shaped steel bars 8 are embedded in the side surface of the prefabricated concrete column 1 at the floor height, and the groove-shaped steel bars 8 are connected with steel bars in a prefabricated concrete floor slab or a cast-in-place floor slab; an internal thread high-strength sleeve 11 is pre-embedded at the joint of the precast concrete column 1 and the upper and lower rows of stressed steel bars of the frame beam, and the internal thread high-strength sleeve 11 is connected with the stressed steel bars of the precast concrete column 1 or firmly anchored in the precast concrete column 1 through anchoring steel bars; after the hoisting is finished, when the frame beam is installed, the connecting steel bar of the frame beam is connected with the precast concrete column 1 through the internal thread high-strength sleeve 11 at the corresponding position.
In this embodiment, two opposite column corners at the top of the precast concrete column 1 are provided with right angle positioning angles 12.
Based on the grouting joint bar compaction grouting sleeve precast concrete column, the embodiment also provides a construction method of the grouting joint bar compaction grouting sleeve precast concrete column, which comprises the following steps:
1) a group of workers are responsible for checking and measuring the levelness of the top surface of the precast concrete column, and if the deviation exceeds the installation regulation, the levelness of the top surface is adjusted by plastering or adding a gasket; fixing 2 right-angle positioning angle steels 12 on opposite angles of the precast concrete column 1 by bolts; then taking down the grouting sleeve 3 and the cap on the top surface of the circular steel tube sleeve 2, and checking the interior of the grouting sleeve 3, the grouting opening 4 and the grout outlet 5 by using a flashlight to ensure that the grouting sleeve is smooth and free of blockage; firstly, plugging a grouting opening 4 and a grout outlet 5 on the side surface of a precast concrete column 1 by using rubber stoppers 9; according to the preparation proportion and the stirring requirement of the high-strength grouting material for the grouting sleeve 3, the grouting material is prepared, after stirring is completed and standing is carried out to eliminate bubbles, the interiors of the grouting sleeve 3 and the circular steel tube sleeve 2 are filled with or lower than the interiors of the grouting sleeve 3 and the circular steel tube sleeve 2 by a funnel or a pressure grouting pipe, the vacant volume of the grouting material to the top surface is smaller than the volume of the inserted connecting steel bar 7 or the circular steel tube concrete shear key 6, and after the connecting steel bar 7 and the circular steel tube concrete shear key 6 are inserted, the grouting material can fill the inner space of the grouting sleeve 3 and the circular steel tube sleeve 2;
2) the other group of workers are responsible for hoisting the precast concrete column 1 on the upper layer, the connecting steel bars 7 of the precast concrete column 1 face downwards, and the position of the lifting hook is adjusted during hoisting, so that the vertical axis of the precast concrete column 1 after hoisting is ensured; after all grouting materials at the joint are filled, the precast concrete column 1 is immediately lifted and installed, after the precast concrete column 1 at the upper part is lifted to the upper part of the precast concrete column 1 at the lower part, the column corner at the bottom of the precast concrete column 1 at the upper part is aligned to enter two right angle positioning angle steels 12 at the opposite angle of the precast concrete column 1 at the lower part, the column body is prevented from inclining or rotating, the precast concrete column 1 slowly falls until the convex whole length of the connecting steel bar 7 is inserted into the grouting sleeve 3, and the inner circular steel tube concrete shear keys 6 of the upper precast concrete column 1 are all inserted into the circular steel tube sleeves of the lower precast concrete column 1 to clean the grouting material overflowing from the outside, the precast concrete column 1 is fixed with a floor slab on the ground by inclined struts on two adjacent sides of the precast concrete column 1 so as to prevent the hardening strength of the grouting material from being influenced after disturbance.
In the construction process, if the grouting material pouring condition in a certain grouting sleeve 3 needs to be checked, the grout outlet 5 arranged on the grouting sleeve 3 is tightly plugged by an L-shaped transparent plastic guide pipe 10 (shown in figure 3), the top surface of the L-shaped transparent plastic guide pipe 10 is not closed and is directly communicated with the atmosphere, and the height of the top surface is higher than the joint of the precast concrete column 1; when the entire length of the connecting reinforcement 7 is inserted into the interior of the grout sleeve 3, it is checked whether the level of the grout in the L-shaped transparent plastic pipe 10 is maintained flush with the joint.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (9)
1. The utility model provides a crowded dense grout sleeve precast concrete post of grout dowel bar which characterized in that: the concrete column comprises a plurality of sections of prefabricated concrete columns which are connected up and down, wherein a round steel tube sleeve and a plurality of grouting sleeves are arranged at the top of each prefabricated concrete column, a grouting opening and a grout outlet which are respectively communicated with the inner cavities of the grouting sleeves are formed in the side surface of each prefabricated concrete column, round steel tube concrete shear keys corresponding to the round steel tube sleeves and connecting steel bars corresponding to the grouting sleeves in a one-to-one mode are protruded from the bottom of each prefabricated concrete column, the top of each connecting steel bar is connected with the bottom of each grouting sleeve, when each section of prefabricated concrete column is spliced, the round steel tube concrete shear keys protruded from the bottom of the upper section of the prefabricated concrete column are inserted into the round steel tube sleeves at the top of the lower section of the prefabricated concrete column, and the round steel tube sleeves are filled with high-strength grouting material to connect the round steel tube shear keys and the round steel tube sleeves into a whole, the connecting steel bars protruding from the bottom of the precast concrete column at the upper section are inserted into the top grouting sleeve of the precast concrete column at the lower section, and high-strength grouting material is filled in the grouting sleeve to connect the connecting steel bars and the grouting sleeve into a whole.
2. The precast concrete column of the grouting and tendon-compacting grouting sleeve of claim 1, characterized in that: the circular steel tube sleeve is arranged at the column center of the precast concrete column, and the grouting sleeve is arranged on the periphery of the circular steel tube sleeve.
3. The precast concrete column of the grouting and tendon-compacting grouting sleeve of claim 1, characterized in that: the round steel tube concrete shear key is arranged at the column center of the precast concrete column, and the connecting steel bars are arranged at the periphery of the round steel tube concrete shear key.
4. The precast concrete column of the grouting and tendon-compacting grouting sleeve of claim 1, characterized in that: and a row of groove-shaped steel bars are pre-embedded in the side surface of the floor height of the precast concrete column, and the groove-shaped steel bars are connected with steel bars in a floor precast concrete floor slab or a cast-in-place floor slab.
5. The precast concrete column of the grouting and tendon-compacting grouting sleeve of claim 1, characterized in that: an internal thread high-strength sleeve is pre-embedded at the joint of the precast concrete column and the upper and lower rows of stressed steel bars of the frame beam, and the internal thread high-strength sleeve is connected with the stressed steel bars of the precast concrete column or is firmly anchored in the precast concrete column through anchoring steel bars; after the hoisting is finished, when the frame beam is installed, the connecting steel bars of the frame beam are connected with the precast concrete column through the internal thread high-strength sleeves at the corresponding positions.
6. The precast concrete column of the grouting and tendon-compacting grouting sleeve of claim 1, characterized in that: and right-angle positioning angle steels are arranged at two opposite column corners at the top of the precast concrete column.
7. A construction method for a precast concrete column with a grouting joint bar compaction grouting sleeve is characterized by comprising the following steps:
1) a group of workers are responsible for checking and measuring the levelness of the top surface of the precast concrete column, and if the deviation exceeds the installation regulation, the levelness of the top surface is adjusted; fixing 2 right-angle positioning angle steels on opposite angles of the precast concrete column by using bolts; then taking down the grouting sleeve and the cap on the top surface of the circular steel tube sleeve, and checking the interior of the grouting sleeve, the grouting opening and the grout outlet by using a flashlight to ensure that the grouting sleeve is smooth and free of blockage; firstly, plugging a grouting opening and a grout outlet on the side surface of the precast concrete column by rubber plugs; according to the preparation proportion and the stirring requirement of the high-strength grouting material for the grouting sleeve, the grouting material is prepared, after stirring is completed and standing is carried out to eliminate bubbles, the interiors of the grouting sleeve and the circular steel tube sleeve are filled or lower than the interiors of the grouting sleeve and the circular steel tube sleeve by using a funnel or a pressure grouting pipe, the vacant volume of the grouting material to the top surface is smaller than the volume of the inserted connecting steel bar or circular steel tube concrete shear key, and after the connecting steel bar and the circular steel tube concrete shear key are inserted, the grouting material can fill the inner space of the grouting sleeve and the circular steel tube sleeve;
2) the other group of workers are responsible for hoisting the precast concrete column on the upper layer, the connecting steel bars of the precast concrete column face downwards, and the position of the lifting hook is adjusted during hoisting to ensure that the axis of the hoisted precast concrete column is vertical; after all grouting materials at the joint are filled, immediately hoisting and installing the precast concrete column, after the precast concrete column at the upper part is hoisted to the upper part of the precast concrete column at the lower part, aligning the bottom column corner of the precast concrete column at the upper part into two right-angle positioning angle steels at the opposite angle of the precast concrete column at the lower part, preventing the column body from inclining or rotating, slowly dropping the precast concrete column until the whole length of the convex part of the connecting steel bar is inserted into the grouting sleeve, and completely inserting all inner circular steel tube concrete shear keys of the precast concrete column at the upper part into the circular steel tube sleeve of the precast concrete column at the lower part, cleaning the grouting materials overflowing from the outside, fixing the precast concrete column and a floor slab on the ground by using inclined struts at two adjacent sides of the precast concrete column, and preventing the hardening strength of the grouting materials from being influenced after disturbance.
8. The construction method of the precast concrete column with the grouting, rebar-inserting, compaction and grouting sleeves as claimed in claim 7, is characterized in that: and the levelness of the top surface of the precast concrete column is adjusted by means of plastering or adding a gasket.
9. The construction method of the precast concrete column with the grouting, rebar-inserting, compaction and grouting sleeves as claimed in claim 7, is characterized in that: if the grouting material pouring condition in a certain grouting sleeve needs to be checked, the grout outlet on the grouting sleeve is plugged by an L-shaped transparent plastic guide pipe, the top surface of the L-shaped plastic pipe is not sealed and is directly communicated with the atmosphere, and the height of the top surface is higher than the joint of the precast concrete column; when the whole length of the connecting steel bar is inserted into the interior of the grouting sleeve, whether the liquid level of the grouting material in the L-shaped transparent plastic guide pipe is level with the seam or not is checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210278452.0A CN114562071A (en) | 2022-03-17 | 2022-03-17 | Grouting joint bar compaction grouting sleeve precast concrete column and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210278452.0A CN114562071A (en) | 2022-03-17 | 2022-03-17 | Grouting joint bar compaction grouting sleeve precast concrete column and construction method |
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