CN115370001A - Grouting construction process for prestress assembly type concrete frame joint - Google Patents
Grouting construction process for prestress assembly type concrete frame joint Download PDFInfo
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- CN115370001A CN115370001A CN202211104897.3A CN202211104897A CN115370001A CN 115370001 A CN115370001 A CN 115370001A CN 202211104897 A CN202211104897 A CN 202211104897A CN 115370001 A CN115370001 A CN 115370001A
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 239000004567 concrete Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000011440 grout Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 210000002435 tendon Anatomy 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 61
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 57
- 238000007599 discharging Methods 0.000 claims abstract description 52
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000004088 foaming agent Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims 1
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
-
- 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
- E04B1/22—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 with parts being prestressed
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E04G21/14—Conveying or assembling building elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention relates to a grouting construction process for a prestress assembly type concrete frame joint, and belongs to the technical field of building construction. The construction process for grouting the prestress assembly type concrete frame joint specifically comprises the following steps: A. hoisting the precast beam and the precast column; B. connecting reinforcing steel bars at the beam ends for installation; C. penetrating prestressed tendons; D. plugging a prestressed tendon duct; E. sealing the beam column joint; F. preparing grouting material; G. grouting. The grouting pipe, the grout discharging hole and the like are arranged, and the grouting process flow is combined, so that the grouting of the beam-column joint, the reserved hole channel of the steel bar and the reserved notch is finished at one time, the construction efficiency is high, and the operation is convenient; the grouting holes and the grout discharging holes are all positioned at the tops of the left precast beam, the right precast beam and the precast column, so that construction and observation are facilitated; the grouting material has clear and smooth flow path and can effectively ensure the grouting construction quality.
Description
Technical Field
The invention relates to a grouting construction process for a prestressed assembly type concrete frame joint, and belongs to the technical field of building construction.
Background
The assembled integral concrete frame structure is widely applied to assembled buildings in China, and with the deep promotion of building industrialization, the existing structural system can not meet the actual engineering requirements. The domestic scholars introduces post-tensioned prestressing into the frame by using the experience of the American PRESSS system for reference, and develops the prestressed assembly type concrete frame. The prefabricated column is continuous in the node area, prestressed tendon channels are reserved in the beam and column members, a notch is reserved at the beam end, longitudinal steel bars are installed in the channels, and channels are reserved in corresponding positions in the column for the longitudinal steel bars to pass through the node area. The beam column joint, the reserved hole and the notch all need to be grouted, the existing method adopts independent grouting modes, namely, the beam column joint is firstly grouted, and then the reinforcing steel bar reserved hole is respectively grouted, and the method mainly has the following problems:
1. the space of the joint is narrow, the reserved hole channel of the steel bar is difficult to seal, and the grout is easy to leak when the joint is grouted, so that the reserved hole channel is blocked, and the reserved hole channel of the steel bar cannot be grouted;
2. the number of the pore canals in the beam end and the column is large, the work load of independent grouting is large, and the construction process is complex;
3. the grouting of the reserved hole of the reinforcing steel bar needs to be carried out after the grouting material at the joint forms strength, and the construction efficiency is not improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a grouting construction process for prestressed assembly type concrete frame joints aiming at the defects of the prior art.
The technical scheme provided by the invention for solving the technical problems is as follows: a grouting construction process for a prestressed assembly type concrete frame joint comprises the steps that the prestressed assembly type concrete frame joint comprises a left precast beam, a right precast beam and a precast column, the left precast beam is arranged on the left side of the middle of the precast column, and a beam column joint is formed between the left precast beam and the precast column; the right precast beam is arranged on the right side of the middle part of the precast column, a beam column joint is arranged between the right precast beam and the precast column, two parallel right reinforcing steel bar reserved channels are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam along the length direction of the right precast beam, the right reinforcing steel bar reserved channel on one side of the bottom of the right precast beam is communicated with a grouting pipe, the right reinforcing steel bar reserved channel on the other side of the bottom of the right precast beam is communicated with a grout discharge pipe, the right reinforcing steel bar reserved channels on two sides of the top of the right precast beam are respectively communicated with a grout discharge pipe, and the middle part of the right precast beam is provided with a right prestressed reinforcing steel bar channel along the axis of the right precast beam;
column steel bar reserved channels are respectively arranged in the middle of the prefabricated column and in positions corresponding to the right steel bar reserved channels, and column prestressed tendon channels are arranged in the middle of the prefabricated column and in positions corresponding to the right prestressed tendon channels;
two parallel left reinforcing steel bar reserved channels are respectively arranged on two sides of the top and two sides of the bottom of the left precast beam along the length direction of the left precast beam, reserved notches are respectively arranged on the top and the bottom of the left precast beam along the length direction of the left precast beam, one end of each left reinforcing steel bar reserved channel is communicated with the reserved notches, the other end of each left reinforcing steel bar reserved channel is communicated with a beam column joint, and the positions of the left reinforcing steel bar reserved channels respectively correspond to the positions of the column reinforcing steel bar reserved channels;
a communicating pipe is arranged between the reserved notches at the top and the bottom of the left precast beam; the middle part of the left precast beam is provided with a left prestressed tendon pore channel along the axis;
the grouting construction process of the prestress assembly type concrete frame joint specifically comprises the following steps:
A. hoisting the precast beam and the column: firstly, hoisting a prefabricated column, a left prefabricated beam and a right prefabricated beam in place in sequence;
B. and (3) mounting the beam end connecting steel bars: respectively penetrating the beam-end connecting steel bars into the left steel bar reserved hole, the column steel bar reserved hole and the right steel bar reserved hole through the reserved notches;
C. and (3) penetrating prestressed tendons: penetrating the prestressed tendon into a left prestressed tendon pore channel, a column prestressed tendon pore channel and a right prestressed tendon pore channel;
D. plugging a prestressed tendon channel: adopting a foaming agent to block the joint of the prestressed tendon duct at the beam column joint, firstly filling the lower half part of the duct and then filling the upper half part of the duct;
E. and (3) beam column joint sealing: the periphery of the beam-column joint and the reserved notches at the top and the bottom of the left precast beam are sealed by adopting a template, a flexible adhesive tape is arranged on the contact surface of the template and the concrete, and the template is fixed by adopting split bolts; the template at the top of the beam column joint and the template at the top of the left precast beam are respectively provided with a grout discharging hole;
F. and (3) grouting material preparation: firstly, adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from a grouting pipe by using a grouting machine with the grouting pressure of 5MPa and the flow rate of 1m 3 And h, after grouting materials flow out of the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, sequentially plugging the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, judging that the joints are full after the grouting materials flow out of all the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, and finishing grouting construction.
The improvement of the technical scheme is as follows: the width of the beam-column joint ranges from 20mm to 30mm.
The improvement of the technical scheme is as follows: the left precast beam and the right precast beam are respectively provided with a beam end key groove in the middle of the beam column joint, and the depth of the beam end key groove is 30mm.
The improvement of the technical scheme is as follows: one ends of the left prestressed tendon pore channel and the right prestressed tendon pore channel, which are close to each other, extend out of the beam end key groove respectively and are flush with the beam end surfaces of the left precast beam and the right precast beam respectively.
The improvement of the technical scheme is as follows: the two ends of the column prestressed tendon pore canal respectively extend out of the column side surface of the prefabricated column by 5mm-10mm.
The improvement of the technical scheme is as follows: the included angle between the axial line of the grouting pipe and the plumb line is 5-10 degrees; the included angle between the grout discharging pipe communicated with the right steel bar reserved hole channel at the bottom of the right precast beam and the plumb line is 5-10 degrees.
The improvement of the technical scheme is as follows: the included angle between the axial line of the grouting pipe and the plumb line is 5 degrees; and the included angle between the grout discharging pipe communicated with the right reinforcing steel bar reserved hole at the bottom of the right precast beam and the plumb line is 5 degrees.
A grouting construction process for a prestressed assembly type concrete frame joint comprises a right precast beam and a precast column, wherein the right precast beam is arranged on the right side of the middle of the precast column, a beam column joint is formed between the right precast beam and the precast column, two parallel right reinforcing steel bar reserved channels are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam along the length direction of the right precast beam, the right reinforcing steel bar reserved channel on one side of the bottom of the right precast beam is communicated with a grouting pipe, the right reinforcing steel bar reserved channel on the other side of the bottom of the right precast beam is communicated with a grout pipe, the right reinforcing steel bar reserved channels on two sides of the top of the right precast beam are respectively communicated with a grout pipe, and the middle of the right precast beam is provided with a right prestressed reinforcing steel bar channel along the axis of the right precast beam;
a column steel bar reserved hole channel is respectively arranged at the corresponding position of the middle part of the prefabricated column and the right steel bar reserved hole channel, an exposed pipe orifice is arranged at one side of the column steel bar reserved hole channel, which is far away from the right prefabricated beam, and a column prestressed tendon hole channel is arranged at the corresponding position of the middle part of the prefabricated column and the right prestressed tendon hole channel;
the grouting construction process of the prestress assembly type concrete frame joint specifically comprises the following steps:
A. hoisting the precast beam and the column: firstly, hoisting a prefabricated column and a right prefabricated beam in place in sequence;
B. and (3) mounting the beam end connecting steel bars: penetrating the beam end connecting steel bar into the column steel bar reserved hole channel and the right steel bar reserved hole channel from the exposed pipe opening;
C. and (3) penetrating prestressed tendons: penetrating the prestressed tendon into the column prestressed tendon pore channel and the right prestressed tendon pore channel;
D. plugging a prestressed tendon channel: adopting a foaming agent to seal and block the joint of the prestressed tendon duct at the beam column joint, filling the lower half part of the duct and filling the upper half part of the duct;
E. and (3) beam column joint sealing: the periphery of a beam column joint is sealed by adopting a template, a flexible adhesive tape is arranged on the contact surface of the template and the concrete, and the template is fixed by adopting split bolts; the template at the top of the beam-column joint is provided with a slurry discharge hole;
F. and (3) grouting material preparation: firstly adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from a grouting pipe by using a grouting machine, wherein the grouting pressure is 5MPa, and the flow is 1m 3 And h, after grouting materials flow out of the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, sequentially plugging the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, judging that the joints are full after the grouting materials flow out of all the grout discharging pipes, the grout discharging holes and the exposed pipe orifices, and finishing grouting construction.
The invention adopts the technical scheme that the beneficial effects are as follows:
in the grouting construction process for the prestressed assembly type concrete frame joint, the grouting pipes, the grout discharge holes and the like are arranged, and the grouting process flow is combined, so that the beam column joint, the reserved hole channel of the steel bar and the reserved notch are grouted at one time, the construction efficiency is high, and the operation is convenient; the grouting holes and the grout discharging holes are all positioned at the tops of the left precast beam, the right precast beam and the precast column, so that construction and observation are facilitated; the grouting material has clear and smooth flow path and can effectively ensure the grouting construction quality.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a prestressed fabricated concrete framework node in embodiment 1 of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic cross-sectional view of C-C of FIG. 1;
FIG. 5 is a schematic structural diagram of steps A to D in a grouting construction process for a prestressed concrete frame joint according to embodiment 1 of the present invention;
fig. 6 is a schematic structural view of step E in a grouting construction process for a prestressed fabricated concrete frame joint according to embodiment 1 of the present invention;
FIG. 7 is a schematic top view of the structure of FIG. 6;
fig. 8 is a schematic structural view of a prestressed fabricated concrete frame node in embodiment 2 of the present invention;
FIG. 9 is a schematic left side view of the prefabricated column of FIG. 8;
FIG. 10 is a schematic structural diagram illustrating steps A to D of a grouting construction process for a prestressed concrete framework joint according to embodiment 2 of the present invention;
fig. 11 is a schematic structural view of step E in a grouting construction process for a prestressed concrete frame joint according to embodiment 2 of the present invention;
FIG. 12 is a schematic top view of the structure of FIG. 11;
wherein: 1-left precast beam, 11-left steel bar reserved hole channel, 12-reserved notch, 13-communicating pipe, 14-beam end key groove, 15-left prestressed rib hole channel, 16-beam end connecting steel bar, 17-prestressed rib, 18-prestressed rib hole channel joint, 19-template, 191-grout outlet, 20-split bolt, 2-right precast beam, 21-right steel bar reserved hole channel, 22-grout inlet pipe, 23-grout outlet pipe, 24-right prestressed rib hole channel, 3-precast column, 31-column steel bar reserved hole channel, 32-column prestressed rib hole channel, 33-exposed pipe orifice and 4-beam column joint.
Detailed Description
Example 1
In the grouting construction process of the prestressed assembly type concrete frame joint of the embodiment, as shown in fig. 1-7, the prestressed assembly type concrete frame joint comprises a left precast beam 1, a right precast beam 2 and a precast column 3, the left precast beam 1 is arranged on the left side of the middle of the precast column 3, and a beam column joint 4 is arranged between the left precast beam 1 and the precast column 3; the right precast beam 2 is arranged on the right side of the middle part of the precast column 3, a beam column joint 4 is arranged between the right precast beam 2 and the precast column 3, two parallel right reinforcing steel bar reserved channels 21 are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam 2 along the length direction of the right precast beam, the right reinforcing steel bar reserved channel 21 on one side of the bottom of the right precast beam 2 is communicated with a grouting pipe 22, the right reinforcing steel bar reserved channel 21 on the other side of the bottom of the right precast beam 2 is communicated with a grout discharge pipe 23, the right reinforcing steel bar reserved channels 21 on two sides of the top of the right precast beam 2 are respectively communicated with a grout discharge pipe 23, and the middle part of the right precast beam 2 is provided with a right prestressed reinforcing steel bar channel 24 along the axis of the right precast beam;
a column steel bar reserved hole 31 is respectively arranged in the middle of the prefabricated column 3 and at the position corresponding to the right steel bar reserved hole 21, and a column prestressed tendon hole 32 is arranged in the middle of the prefabricated column 3 and at the position corresponding to the right prestressed tendon hole 24;
as shown in fig. 1 and 3, two parallel left reinforcing steel bar reserved channels 11 are respectively arranged on two sides of the top and two sides of the bottom of the left precast beam 1 along the length direction of the left precast beam, reserved notches 12 are respectively arranged on the top and the bottom of the left precast beam 1 along the length direction of the left precast beam, one end of each left reinforcing steel bar reserved channel 11 is communicated with the corresponding reserved notch 12, the other end of each left reinforcing steel bar reserved channel 11 is communicated with a beam-column joint 4, and the positions of the left reinforcing steel bar reserved channels 11 respectively correspond to the positions of the column reinforcing steel bar reserved channels 31;
as shown in fig. 4, a communicating pipe 13 is arranged between the top and bottom reserved notches 12 of the left precast beam 1; the middle part of the left precast beam 1 is provided with a left prestressed tendon pore passage 15 along the axis thereof;
the grouting construction process for the prestress assembly type concrete frame joint of the embodiment specifically comprises the following steps:
A. hoisting the precast beam and the column: as shown in fig. 5, firstly, hoisting the precast column 3, the left precast beam 1 and the right precast beam 2 in sequence;
B. and (3) mounting the beam end connecting steel bars: as shown in fig. 5, the beam end connecting steel bar 16 is respectively inserted into the left steel bar preformed hole 11, the column steel bar preformed hole 31 and the right steel bar preformed hole 21 through the preformed notch 12;
C. and (3) penetrating prestressed tendons: as shown in fig. 5, the tendon 17 is inserted into the left tendon hole 15, the column tendon hole 32 and the right tendon hole 24;
D. plugging a prestressed tendon channel: as shown in fig. 5, a foaming agent is used for plugging a prestressed tendon duct joint 18 at a beam-column joint 4, the lower half part of a duct is filled first, and the upper half part of the duct is filled;
E. and (3) beam column joint sealing: as shown in fig. 6 and 7, the reserved notches 12 at the periphery of the beam-column joint 4 and the top and the bottom of the left precast beam 1 are closed by using a template 19, a flexible adhesive tape is arranged on the contact surface of the template 19 and the concrete, and the template 19 is fixed by using split bolts 20; the template 19 at the top of the beam-column joint 4 and the template 19 at the top of the left precast beam 1 are respectively provided with a grout discharging hole 191;
F. and (3) grouting material preparation: firstly adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from the grouting pipe 22 by using a grouting machine with grouting pressure of 5MPa and flow rate1m 3 And h, after grouting materials flow out of the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33, sequentially plugging the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33, judging that the joints are full, and completing grouting construction after all the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33 flow out of the grouting materials.
In the grouting construction process for the prestressed assembly type concrete frame joint, the width range of the beam-column joint 4 is 20-30 mm. The middle parts of the left precast beam 1 and the right precast beam 2 at the beam-column joint 4 are respectively provided with a beam-end key slot 14, and the depth of the beam-end key slot 14 is 30mm. One ends of the left prestressed tendon duct 15 and the right prestressed tendon duct 24, which are close to each other, respectively extend out of the beam-end key groove 14 and are flush with the beam-end surfaces of the left precast beam 1 and the right precast beam 2, respectively. The two ends of the column tendon duct 32 extend 5mm-10mm from the column side surface of the precast column 3, respectively.
In the grouting construction process for the prestressed assembly type concrete frame joint of the embodiment, the included angle between the axis of the grouting pipe 22 and the plumb line is 5 degrees; the included angle between the grout outlet pipe 23 communicated with the right reinforcing steel bar reserved hole 21 at the bottom of the right precast beam 2 and the plumb line is 5 degrees. The angle is convenient to arrange air in the discharge pipe during grouting and slurry discharging, and smooth and efficient grouting and slurry discharging are guaranteed.
In the grouting construction process for the prestressed assembly type concrete frame joint of the embodiment, when grouting is performed in the step G, the flowing direction of the grouting material is as shown in fig. 1 and 2, the grouting material flows into the right reinforcement reserved hole 21 on the right side of the beam bottom of the right precast beam 2 from top to bottom from the grouting pipe 22, and flows into the right beam-column joint 4 from right to left along the right reinforcement reserved hole 21;
grouting material flows into the right reinforcement reserved hole 21 at the bottom left side of the right precast beam 2 from the right side beam column joint 4 rightwards and flows upwards along the grout discharging pipe 23 communicated with the end part of the right reinforcement reserved hole 21;
meanwhile, grouting material flows into the column steel bar reserved hole channel 31 at the lower part of the prefabricated column 3 leftwards from the right side beam-column joint 4 and flows out from the left side beam-column joint 4;
grouting material flows into a left steel bar reserved hole 11 at the bottom of the left precast beam 1 from the left side beam column joint 4 and then flows into a reserved notch 12 at the bottom of the left precast beam 1;
the liquid level of the grouting material in the right side beam column joint 4 continuously rises, and finally flows to the right reinforcing steel bar reserved hole 21 at the top of the right precast beam 2 rightwards, flows to the column reinforcing steel bar reserved hole 31 at the upper part of the precast column 3 leftwards and flows to the left side beam column joint 4; after the right steel bar reserved hole 21 at the top of the right precast beam 2 is filled with the grout material, the grout material respectively flows out of the grout discharging pipe 23 communicated with the right steel bar reserved hole 21; after the right beam column joint 4 is fully filled, grouting material flows out of the grout discharging hole 191;
the liquid level of the grouting material in the left beam-column joint 4 continuously rises, and finally flows leftwards into a left steel bar reserved hole channel 11 at the top of the left precast beam 1 and then flows into a reserved notch 12 at the top of the left precast beam 1; after the left beam-column joint 4 is filled with the grouting material, the grouting material flows out of the grout outlet 191;
after the reserved notch 12 at the bottom of the left precast beam 1 is filled, grouting material flows upwards into the reserved notch 12 at the top of the left precast beam 1 through the communicating pipe 13, and the grouting material flows out from the grout outlet 191 after the reserved notch 12 at the top of the left precast beam 1 is filled. In this embodiment, the grouting material is a cement-based shrinkage-compensating grouting material.
Example 2
The grouting construction process for the prestressed assembly type concrete frame joint of the embodiment is shown in fig. 8-12, the prestressed assembly type concrete frame joint comprisesbase:Sub>A right precast beam 2 andbase:Sub>A precast column 3, the right precast beam 2 is arranged on the right side of the middle of the precast column 3,base:Sub>A beam column joint 4 is arranged between the right precast beam 2 and the precast column 3, two parallel right reinforcing steel bar reserved channels 21 are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam 2 along the length direction of the right precast beam, the sectional structure schematic diagram ofbase:Sub>A-base:Sub>A in fig. 7 is the same as that in fig. 2, as shown in fig. 2, the right reinforcing steel bar reserved channel 21 on one side of the bottom of the right precast beam 2 is communicated withbase:Sub>A grouting pipe 22, the right reinforcing steel bar reserved channel 21 on the other side of the bottom of the right precast beam 2 is communicated withbase:Sub>A grout discharge pipe 23, the right reinforcing steel bar reserved channels 21 on two sides of the top of the right precast beam 2 are respectively communicated withbase:Sub>A grout discharge pipe 23, and the middle of the right precast beam 2 is provided withbase:Sub>A right prestressed steel bar channel 24 along the axis of the right precast beam;
as shown in fig. 8, column reinforcing steel bar reserved channels 31 are respectively arranged in the middle of the precast column 3 and at positions corresponding to the right reinforcing steel bar reserved channels 21, as shown in fig. 10, an exposed pipe opening 33 is arranged on one side, away from the right precast beam 2, of the column reinforcing steel bar reserved channel 31, and a column prestressed tendon channel 32 is arranged in the middle of the precast column 3 and at a position corresponding to the right prestressed tendon channel 24;
the grouting construction process for the prestress assembly type concrete frame joint of the embodiment specifically comprises the following steps:
A. hoisting the precast beam and the column: as shown in fig. 10, firstly, hoisting the precast column 3 and the right precast beam 2 in sequence;
B. and (3) mounting the beam end connecting steel bars: as shown in fig. 10, the beam end connecting steel bar 16 is inserted into the column steel bar preformed hole 31 and the right steel bar preformed hole 21 from the exposed pipe opening 33;
C. and (3) penetrating prestressed tendons: as shown in fig. 10, the tendon 17 is inserted into the column tendon hole 32 and the right tendon hole 24;
D. plugging a prestressed tendon channel: as shown in fig. 10, a foaming agent is used to block the prestressed tendon duct joint 18 at the beam-column joint 4, the lower half part of the duct is filled first, and the upper half part of the duct is filled;
E. and (3) beam column joint sealing: as shown in fig. 11 and 12, the periphery of the beam-column joint 4 is sealed by using a template 19, a flexible adhesive tape is arranged on the contact surface of the template 19 and the concrete, and the template 19 is fixed by using a split bolt 20; the template 19 at the top of the beam column joint 4 is provided with a grout discharging hole 191;
F. and (3) grouting material preparation: firstly, adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from the grouting pipe 22 by a grouting machine with grouting pressure of 5MPa and flow rate of 1m 3 And h, after grouting materials flow out of the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33, sequentially plugging the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33, judging that the joints are full, and completing grouting construction after all the grout discharging pipes 23, the grout discharging holes 191 and the exposed pipe orifices 33 flow out of the grouting materials.
In the grouting construction process for the prestressed assembly type concrete frame joint of the embodiment, when grouting is performed in the step G, the flowing direction of the grouting material is as shown in fig. 8 and 2, the grouting material flows into the right reinforcement reserved hole 21 on the right side of the beam bottom of the right precast beam 2 from top to bottom from the grouting pipe 22, and flows into the right beam-column joint 4 from right to left along the right reinforcement reserved hole 21;
grouting material flows into the right reinforcing steel bar reserved hole 21 on the left side of the beam bottom of the right precast beam 2 from the beam column joint 4 rightwards and flows upwards along a grout outlet pipe 23 communicated with the end part of the right reinforcing steel bar reserved hole 21;
grouting material flows into the column steel bar reserved hole 31 at the lower part of the prefabricated column 3 leftwards from the beam-column joint 4 and then flows out from the exposed pipe orifice 33;
the liquid level of the grouting material in the beam column joint 4 continuously rises, and finally flows rightwards into a right reinforcing steel bar reserved hole channel 21 at the top of the right precast beam 2 and leftwards into a column reinforcing steel bar reserved hole channel 31 at the upper part of the precast column 3; after the right reinforcing steel bar reserved hole channel 21 at the top of the right precast beam 2 is filled with the grouting material, the grouting material flows out of a grout outlet pipe 23 communicated with the right reinforcing steel bar reserved hole channel 21; after the column steel bar reserved hole channel 31 at the upper part of the prefabricated column 3 is filled with the grout flows out from the exposed pipe orifice 33; and after the beam-column joint 4 is filled with the grouting material, the grouting material flows out of the grout outlet 191. In this embodiment, the grouting material is a cement-based shrinkage-compensating grouting material.
The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.
Claims (8)
1. A grouting construction process for a prestressed assembly type concrete frame joint comprises a left precast beam (1), a right precast beam (2) and a precast column (3), wherein the left precast beam (1) is arranged on the left side of the middle of the precast column (3), and a beam-column joint (4) is arranged between the left precast beam (1) and the precast column (3); right side precast beam (2) set up the middle part right side of precast column (3), be beam column seam (4), its characterized in that between right side precast beam (2) and precast column (3):
two parallel right reinforcing steel bar reserved channels (21) are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam (2) along the length direction of the right precast beam, the right reinforcing steel bar reserved channel (21) on one side of the bottom of the right precast beam (2) is communicated with a grouting pipe (22), the right reinforcing steel bar reserved channel (21) on the other side of the bottom of the right precast beam (2) is communicated with a grout discharging pipe (23), the right reinforcing steel bar reserved channels (21) on two sides of the top of the right precast beam (2) are respectively communicated with a grout discharging pipe (23), and a right prestressed reinforcing steel bar channel (24) is arranged in the middle of the right precast beam (2) along the axis of the right precast beam;
column steel bar reserved channels (31) are respectively arranged in the middle of the precast column (3) and at positions corresponding to the right steel bar reserved channels (21), and column prestressed tendon channels (32) are arranged in the middle of the precast column (3) and at positions corresponding to the right prestressed tendon channels (24);
two parallel left steel bar reserved hole channels (11) are respectively arranged on two sides of the top and two sides of the bottom of the left precast beam (1) along the length direction of the left precast beam, reserved notches (12) are respectively arranged on the top and the bottom of the left precast beam (1) along the length direction of the left precast beam, one end of each left steel bar reserved hole channel (11) is communicated with the corresponding reserved notch (12), the other end of each left steel bar reserved hole channel (11) is communicated with the beam column joint (4), and the positions of the left steel bar reserved hole channels (11) correspond to the positions of the column steel bar reserved hole channels (31);
a communicating pipe (13) is arranged between the top and the bottom reserved notch (12) of the left precast beam (1); the middle part of the left precast beam (1) is provided with a left prestressed tendon pore canal (15) along the axis thereof;
the grouting construction process for the prestress assembly type concrete frame joint specifically comprises the following steps:
A. hoisting the precast beam and the column: firstly, hoisting a precast column (3), a left precast beam (1) and a right precast beam (2) in sequence;
B. and (3) mounting the beam end connecting steel bars: a beam end connecting steel bar (16) penetrates into the left steel bar reserved hole (11), the column steel bar reserved hole (31) and the right steel bar reserved hole (21) through the reserved notch (12) respectively;
C. and (3) penetrating prestressed tendons: penetrating a prestressed tendon (17) into the left prestressed tendon duct (15), the column prestressed tendon duct (32) and the right prestressed tendon duct (24);
D. plugging a prestressed tendon channel: adopting a foaming agent to plug a prestressed tendon pore channel joint (18) at a beam column joint (4), firstly filling the lower half part of a pore channel and then filling the upper half part of the pore channel;
E. and (3) beam column joint sealing: the reserved notches (12) at the periphery of the beam-column joint (4) and the top and the bottom of the left precast beam (1) are sealed by using a template (19), a flexible adhesive tape is arranged on the contact surface of the template (19) and concrete, and the template (19) is fixed by using split bolts (20); the template (19) at the top of the beam-column joint (4) and the template (19) at the top of the left precast beam (1) are respectively provided with a slurry discharge hole (191);
F. and (3) grouting material preparation: firstly, adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from a grouting pipe (22) by a grouting machine with the grouting pressure of 5MPa and the flow rate of 1m 3 And h, after grouting materials flow out of the grout discharging pipes (23), the grout discharging holes (191) and the exposed pipe orifices (33), sequentially plugging the grout discharging pipes, judging that the joints are full after all the grout discharging pipes (23), the grout discharging holes (191) and the exposed pipe orifices (33) flow out of the grouting materials, and finishing grouting construction.
2. The pre-stressed assembled concrete frame joint grouting construction process according to claim 1, wherein: the width range of the beam-column joint (4) is 20mm-30mm.
3. The pre-stressed assembled concrete frame joint grouting construction process according to claim 1, wherein: the left precast beam (1) and the right precast beam (2) are located beam-column joint (4) middle parts are respectively provided with a beam-end key groove (14), and the depth of the beam-end key groove (14) is 30mm.
4. The pre-stressed assembled concrete frame joint grouting construction process according to claim 3, wherein: one ends, close to each other, of the left prestressed tendon pore canal (15) and the right prestressed tendon pore canal (24) extend out of the beam end key groove (14) respectively and are flush with the beam end surfaces of the left precast beam (1) and the right precast beam (2) respectively.
5. The pre-stressed assembled concrete frame joint grouting construction process according to claim 3, wherein: and two ends of the column prestressed tendon pore canal (32) respectively extend out of the column side surface of the prefabricated column (3) by 5-10 mm.
6. The pre-stressed assembled concrete frame joint grouting construction process according to claim 1, wherein: the included angle between the axial line of the grouting pipe (22) and the plumb line ranges from 5 degrees to 10 degrees; the included angle between the grout discharging pipe (23) communicated with the right reinforcing steel bar reserved hole channel (21) at the bottom of the right precast beam (2) and the plumb line is 5-10 degrees.
7. The pre-stressed assembled concrete frame joint grouting construction process according to claim 6, wherein: the included angle between the axial line of the grouting pipe (22) and the plumb line is 5 degrees; and the included angle between the grout discharging pipe (23) communicated with the right reinforcing steel bar reserved hole channel (21) at the bottom of the right precast beam (2) and the plumb line is 5 degrees.
8. The utility model provides a prestressing force assembled concrete frame node grouting construction technology, prestressing force assembled concrete frame node includes right precast beam (2) and prefabricated post (3), right side precast beam (2) set up the middle part right side of prefabricated post (3), be beam column seam (4), its characterized in that between right side precast beam (2) and prefabricated post (3): two parallel right reinforcing steel bar reserved channels (21) are respectively arranged on two sides of the top and two sides of the bottom of the right precast beam (2) along the length direction of the right precast beam, the right reinforcing steel bar reserved channel (21) on one side of the bottom of the right precast beam (2) is communicated with a grouting pipe (22), the right reinforcing steel bar reserved channel (21) on the other side of the bottom of the right precast beam (2) is communicated with a grout discharge pipe (23), the right reinforcing steel bar reserved channels (21) on two sides of the top of the right precast beam (2) are respectively communicated with a grout discharge pipe (23), and a right prestressed reinforcing steel bar channel (24) is arranged in the middle of the right precast beam (2) along the axis of the right precast beam;
a column steel bar reserved hole channel (31) is arranged in the middle of the prefabricated column (3) and corresponds to the right steel bar reserved hole channel (21), an exposed pipe opening (33) is arranged on one side, away from the right prefabricated beam (2), of the column steel bar reserved hole channel (31), and a column prestressed rib hole channel (32) is arranged in the middle of the prefabricated column (3) and corresponds to the right prestressed rib hole channel (24);
the grouting construction process for the prestress assembly type concrete frame joint specifically comprises the following steps:
A. hoisting the precast beam and the column: firstly, hoisting a prefabricated column (3) and a right prefabricated beam (2) in sequence;
B. and (3) mounting the beam end connecting steel bars: penetrating a beam end connecting steel bar (16) into the column steel bar reserved hole channel (31) and the right steel bar reserved hole channel (21) from the exposed pipe orifice (33);
C. and (3) penetrating prestressed tendons: penetrating a prestressed tendon (17) into the column prestressed tendon duct (32) and the right prestressed tendon duct (24);
D. plugging a prestressed tendon channel: plugging a prestressed tendon duct joint (18) at a beam-column joint (4) by using a foaming agent, filling the lower half part of a duct and filling the upper half part of the duct;
E. and (3) beam column joint sealing: the periphery of a beam column joint (4) is closed by adopting a template (19), a flexible adhesive tape is arranged on the contact surface of the template (19) and concrete, and the template (19) is fixed by adopting a split bolt (20); a template (19) at the top of the beam-column joint (4) is provided with a grout discharging hole (191);
F. and (3) grouting material preparation: firstly, adding water into the grouting material, uniformly stirring, scattering copper-plated steel fiber with the volume reinforcement ratio of 0.1%, and continuously stirring uniformly, wherein the initial fluidity of the grouting material is more than 300mm;
G. grouting: grouting from a grouting pipe (22) by a grouting machine with grouting pressure of 5MPa and flow rate of 1m 3 And h, after grouting materials flow out of the grout discharging pipes (23), the grout discharging holes (191) and the exposed pipe orifices (33), sequentially plugging the grout discharging pipes, judging that the joints are full after all the grout discharging pipes (23), the grout discharging holes (191) and the exposed pipe orifices (33) flow out of the grouting materials, and finishing grouting construction.
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