CN108801346B - Parallel sleeve grouting detection structure and method for vertical prefabricated parts - Google Patents
Parallel sleeve grouting detection structure and method for vertical prefabricated parts Download PDFInfo
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- CN108801346B CN108801346B CN201810565914.0A CN201810565914A CN108801346B CN 108801346 B CN108801346 B CN 108801346B CN 201810565914 A CN201810565914 A CN 201810565914A CN 108801346 B CN108801346 B CN 108801346B
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- 238000001514 detection method Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims description 82
- 239000002002 slurry Substances 0.000 claims description 53
- 239000011440 grout Substances 0.000 claims description 46
- 239000002131 composite material Substances 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 29
- 238000010276 construction Methods 0.000 claims description 19
- 238000011065 in-situ storage Methods 0.000 claims description 18
- 239000011150 reinforced concrete Substances 0.000 claims description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a parallel sleeve grouting detection structure and method for vertical prefabricated components. The invention can learn the worst state of the compactness and the mechanical property of the grouting material of the grouting sleeve in each component in the upper layer vertical prefabricated component by directly detecting the compactness and the mechanical property of the grouting material in the grouting sleeve for detection, solves the problem that the compactness of the grouting sleeve in the vertical prefabricated component concrete cannot be detected in the prior art, and can more accurately judge whether the grouting connection quality of the steel bar sleeve meets the actual engineering requirement.
Description
Technical Field
The invention relates to an assembled building structure, in particular to a parallel sleeve grouting detection structure of a vertical prefabricated part and a parallel sleeve grouting detection method based on the structure.
Background
Compared with the traditional cast-in-place concrete, the assembled reinforced concrete structure can reduce manual labor and wet operation on site, has high construction speed, small influence on surrounding environment, easy control of the quality of prefabricated parts and easier guarantee of the overall construction quality of projects.
Along with research and vigorous popularization of prefabricated concrete buildings in China, the prefabricated concrete structure is developed in a long term in China.
The joining of prefabricated components in fabricated concrete structures is one of the key technologies affecting the safety of the structure. The connection of the prefabricated parts mainly comprises the connection of the reinforcing steel bars and the connection of the concrete, and the quality of the connection part directly influences the safety of the structure.
In traditional cast-in-place concrete structure, the connection between the reinforcing bars adopts mechanical connection, welding or ligature overlap joint generally, and in assembled structure, the connected mode of reinforcing bars is except above-mentioned several, has sleeve grout to connect, thick liquid anchor overlap joint etc. moreover, should not adopt thick liquid anchor overlap joint when the reinforcing bar diameter is great. From the two points of stress requirements of connecting parts and convenience in site construction, sleeve grouting connection is adopted for connection between longitudinal stress steel bars of vertical prefabricated parts in the assembled building structure.
The working mechanism of the grouting joint of the steel bar sleeve is based on the fact that grouting materials in the grouting sleeve have high compressive strength and have micro-expansion characteristics, when the grouting materials are constrained by the grouting sleeve, large forward stress is generated between the grouting materials and the inner side wall of the grouting sleeve, and friction force is generated on the rough surface with ribs by the forward stress of the steel bars, so that axial stress of the steel bars is transferred. The compactness of the slurry in the grouting sleeve joint directly affects the quality of the joint.
Because the sleeve of the vertical component is embedded in the concrete, the prior technical means can not directly detect whether grouting in the sleeve is compact or not outside the concrete. In the technical specification of grouting connection of reinforcing steel bar sleeves, the grouting compactness is required to be compact and full, and all grout outlets should be grouted; the detection method can only be used for observing and checking the construction record.
The quality of the grouting connection of the vertical member steel bar sleeve directly influences the safety of the assembled concrete structure, and along with the rapid development of the assembled concrete structure in China, the requirement of actual engineering cannot be met only by means of observation and inspection of construction records. In order to ensure the grouting connection quality of the vertical member steel bar sleeve in the assembled concrete structure, a detection method for grouting connection of the vertical prefabricated member steel bar sleeve in the assembled building structure is particularly important.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the utility model provides a parallel sleeve grouting detection structure and method of vertical prefabricated component to solve the problem of the thick liquids compactness of the thick liquid sleeve pipe of the unable detection of grouting that is pre-buried in vertical prefabricated component concrete among the prior art.
The technical scheme adopted by the invention is as follows:
the utility model provides a parallel sleeve grout detects structure of vertical prefabricated part, is applicable to the connection structure of upper strata vertical prefabricated part and lower floor's structure, wherein, the atress of lower floor's structure is indulged the muscle and is stretched out from its top surface, the vertical prefabricated part of upper strata pre-buried has the interior grout sleeve of component, this interior grout sleeve of component exposes from the bottom surface of the vertical prefabricated part of upper strata, and the vertical prefabricated part of upper strata is reserved for each the interior grout sleeve of component has grout hole and grout outlet, makes the grout mouth and the grout outlet of the interior grout sleeve of component communicate corresponding grout hole and grout outlet respectively, and the atress of the vertical prefabricated part of upper strata indulges the muscle and inserts in the interior grout sleeve of component; the stressed longitudinal ribs of the lower layer structure are inserted into the grouting sleeves in the corresponding components of the upper layer vertical prefabricated components, and a slurry layer gap is reserved between the bottom surface of the upper layer vertical prefabricated components and the top surface of the lower layer structure; the periphery of the seat slurry layer gap is sealed by a seat slurry layer peripheral wall, so that the seat slurry layer peripheral wall, the bottom surface of the upper layer vertical prefabricated component and the top surface of the lower layer structure enclose a seat slurry layer cavity communicated with each component inner grouting sleeve, wherein one component inner grouting sleeve is used as a grouting end grouting sleeve, and grouting materials flow into each component inner grouting sleeve through the seat slurry layer cavity after being injected from a grouting opening of the grouting end grouting sleeve;
the method is characterized in that:
the parallel sleeve grouting detection structure comprises a blind hole, a communication cavity, a detection grouting sleeve, a detection upper layer steel bar and a detection lower layer steel bar;
the blind holes are preset on the top surface of the lower layer structure;
the communication hole is arranged on the peripheral wall of the grouting layer and is positioned at the position farthest from the grouting sleeve at the grouting end;
the communication cavity is equipped with intercommunication mouth and via hole, the communication cavity sets up on the top surface of lower floor's structure, just the top surface of communication cavity with the bottom surface parallel and level of the vertical prefabricated component in upper strata for: the inner cavity of the communication cavity is communicated with the slurry layer cavity through the connected communication port and the communication hole, the through hole is coaxial with the blind hole of the lower layer structure, and the through hole is communicated with the blind hole of the lower layer structure through the inner cavity of the communication cavity;
the upper layer steel bar for detection and the lower layer steel bar for detection are respectively inserted into the upper port and the lower port of the grouting sleeve for detection, the lower layer steel bar for detection is inserted into the blind hole of the lower layer structure through the via hole of the communication cavity, so that the grouting sleeve for detection is located on the top surface of the communication cavity, and the lower port of the grouting sleeve for detection is communicated with the via hole of the communication cavity, and grouting materials injected from the grouting port of the grouting end grouting sleeve sequentially pass through the seat slurry layer cavity and the inner cavity of the communication cavity and then flow into the grouting sleeve for detection.
As a preferred embodiment of the present invention: the communication cavity constitute by communication cavity perisporium and top mould, the communication cavity perisporium of communication cavity with seat thick liquid layer perisporium is built by seat thick liquid, the top surface of communication cavity perisporium is fixed to the top mould, the top surface of top mould is just the top surface of communication cavity, the via hole sets up on the top mould.
As a preferred embodiment of the present invention: the lower layer structure comprises lower layer vertical prefabricated component, composite beam and composite floor slab, the atress of lower layer structure indulges the muscle promptly the atress of lower layer vertical prefabricated component indulges the muscle, the top surface of lower layer structure promptly the top surface of composite floor slab, the blind hole setting of lower layer structure is in the top surface of composite floor slab, and this blind hole comprises floor blind hole and floor through-hole, the floor blind hole is preset the prefabricated part of composite floor slab, the floor through-hole is reserved the cast-in-place part of composite floor slab and with the coaxial intercommunication of floor blind hole.
As a preferred embodiment of the present invention: the lower layer structure is a reinforced concrete foundation.
As a preferred embodiment of the present invention: the upper layer vertical prefabricated component and the lower layer vertical prefabricated component are prefabricated reinforced concrete columns or prefabricated reinforced concrete shear walls.
A parallel sleeve grouting detection method for vertical prefabricated parts is applicable to a connection structure of an upper-layer vertical prefabricated part and a lower-layer structure, and the construction steps of the connection structure are as follows:
prefabricating the upper layer vertical prefabricated part, wherein the upper layer vertical prefabricated part is pre-embedded with an in-part grouting sleeve, the in-part grouting sleeve is exposed from the bottom surface of the upper layer vertical prefabricated part, the upper layer vertical prefabricated part is provided with grouting holes and grout outlets for each in-part grouting sleeve, a grouting opening and a grout outlet of the in-part grouting sleeve are respectively communicated with the corresponding grouting holes and grout outlets, and a stressed longitudinal rib of the upper layer vertical prefabricated part is inserted into the in-part grouting sleeve;
step two, completing construction of the lower layer structure on a construction site, so that the stressed longitudinal ribs of the lower layer structure extend out of the top surface of the lower layer structure;
step three, installing the upper layer vertical prefabricated component, so that the stressed longitudinal ribs of the lower layer structure are inserted into the grouting sleeves in the components corresponding to the upper layer vertical prefabricated component, and a slurry layer gap is reserved between the bottom surface of the upper layer vertical prefabricated component and the top surface of the lower layer structure;
step four, sealing the periphery of the seat slurry layer gap by using the seat slurry layer peripheral wall, so that the seat slurry layer peripheral wall, the bottom surface of the upper layer vertical prefabricated component and the top surface of the lower layer structure form a seat slurry layer cavity communicated with the grouting sleeves in the components;
step five, taking one of the grouting sleeves in the members as a grouting end grouting sleeve, and injecting grouting material from a grouting opening of the grouting end grouting sleeve so that the grouting material flows into each grouting sleeve in the member through the seat slurry layer cavity;
the method is characterized in that:
the parallel sleeve grouting detection method comprises the following steps:
step S1, reserving a blind hole on the top surface of the lower layer structure in the step II;
s2, reserving a communication hole on the peripheral wall of the grouting layer in the fourth step, wherein the communication hole is positioned at the position farthest from the grouting sleeve at the grouting end; and set up the intercommunication cavity on the top surface of lower floor structure, the top surface of this intercommunication cavity with the bottom surface parallel and level of the vertical prefabricated component of upper strata, and this intercommunication cavity is equipped with intercommunication mouth and via hole for: the inner cavity of the communication cavity is communicated with the slurry layer cavity through the connected communication port and the communication hole, the through hole is coaxial with the blind hole of the lower layer structure, and the through hole is communicated with the blind hole of the lower layer structure through the inner cavity of the communication cavity;
step S3, before implementing the step five, respectively inserting an upper layer of steel bars for detection and a lower layer of steel bars for detection into an upper port and a lower port of a grouting sleeve for detection, and inserting the lower layer of steel bars for detection into a blind hole of the lower layer structure through a via hole of the communication cavity, so that the grouting sleeve for detection is located on the top surface of the communication cavity, and the lower port of the grouting sleeve for detection is communicated with the via hole of the communication cavity; such that: in the fifth step, the grouting material injected from the grouting opening of the grouting end grouting sleeve sequentially passes through the seat slurry layer cavity and the inner cavity of the communicating cavity and flows into the detection grouting sleeve;
and S4, after the step five is completed, removing the grouting sleeve for detection, the upper layer of reinforcing steel bars for detection and the lower layer of reinforcing steel bars for detection together, and detecting the grouting material in the grouting sleeve for detection when the grouting material reaches the design strength required by effective connection of the grouting sleeve in the stressed longitudinal bar of the upper layer vertical prefabricated part and the stressed longitudinal bar of the lower layer structure.
As a preferred embodiment of the present invention: the communication cavity constitute by communication cavity perisporium and top mould, the communication cavity perisporium of communication cavity with seat thick liquid layer perisporium is built by seat thick liquid, the top surface of communication cavity perisporium is fixed to the top mould, the top surface of top mould is just the top surface of communication cavity, the via hole sets up on the top mould.
As a preferred embodiment of the present invention: the lower structure consists of a lower vertical prefabricated component, a superposed beam and a superposed floor slab, wherein the stressed longitudinal ribs of the lower structure are the stressed longitudinal ribs of the lower vertical prefabricated component, the top surface of the lower structure is the top surface of the superposed floor slab, the blind hole of the lower structure is arranged on the top surface of the superposed floor slab and consists of a floor slab blind hole and a floor slab through hole, the floor slab blind hole is preset at the prefabricated part of the superposed floor slab, and the floor slab through hole is reserved at the cast-in-situ part of the superposed floor slab and is coaxially communicated with the floor slab blind hole;
in the first step, the lower layer vertical prefabricated member, the prefabricated part of the superposed beam and the prefabricated part of the superposed floor slab are prefabricated, wherein the prefabricated part of the superposed floor slab is provided with the floor slab blind hole in advance;
in the second step, the construction sequence of the lower layer structure is as follows: firstly, mounting the lower layer vertical prefabricated part in place; then installing the prefabricated part of the superposed beam and the prefabricated part of the superposed floor slab, and binding the reinforcing steel bars of the cast-in-situ part of the superposed beam and the reinforcing steel bars of the cast-in-situ part of the superposed floor slab; and casting and tamping the concrete of the cast-in-situ part of the composite beam and the concrete of the cast-in-situ part of the composite floor slab, and reserving the floor through holes in the cast-in-situ part of the composite floor slab.
As a preferred embodiment of the present invention: the lower layer structure is a reinforced concrete foundation.
As a preferred embodiment of the present invention: the upper layer vertical prefabricated component and the lower layer vertical prefabricated component are prefabricated reinforced concrete columns or prefabricated reinforced concrete shear walls.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through arranging the parallel sleeve grouting detection structure comprising the blind holes, the communication cavities, the detection grouting sleeve, the detection upper layer reinforcing steel bars and the detection lower layer reinforcing steel bars, grouting materials can be injected into the detection grouting sleeve when grouting materials are injected into the grouting sleeves in all the components, and as the peripheral wall of the seat slurry layer and the communication holes of the communication cavities are positioned at the farthest positions from the grouting end grouting sleeve, grouting materials are inevitably injected into the grouting sleeves in all the components embedded in the upper layer vertical prefabricated components preferentially, the compactness of the grouting materials in the detection grouting sleeve is inevitably not superior to that of the grouting sleeves in all the components in the upper layer vertical prefabricated components, the compactness of the grouting materials in the detection grouting sleeve is representative, and represents the worst state of the compactness of the grouting materials in all the components in the upper layer vertical prefabricated components.
Drawings
The invention is described in further detail below with reference to the attached drawings and to specific examples:
FIG. 1 is a schematic plan view of a vertical prefabricated member connection structure to which the parallel sleeve grouting detection structure of the present invention is applied;
FIG. 2 is a schematic cross-sectional view of a vertical prefabricated member connection structure to which the parallel type sleeve grouting detection structure of the present invention is applied;
FIG. 3 is a schematic view of a grout hole and a grout outlet reserved for an upper layer vertical prefabricated part;
fig. 4 is a schematic cross-sectional view of a connection between an upper layer vertical prefabricated member and a lower layer structure by a grouting sleeve in the member.
Detailed Description
As shown in fig. 1 to 4, the invention discloses a parallel sleeve grouting detection structure of a vertical prefabricated part, which is applicable to a connection structure of an upper vertical prefabricated part 1 and a lower structure 2, wherein a stress longitudinal rib 211 of the lower structure 2 extends out of the top surface 2a of the lower structure, an in-part grouting sleeve 3 is pre-embedded in the upper vertical prefabricated part 1, the in-part grouting sleeve 3 is exposed out of the bottom surface of the upper vertical prefabricated part 1, a grouting hole 1a and a grout outlet 1b are reserved in the upper vertical prefabricated part 1 for each in-part grouting sleeve 3, so that a grouting port 3a and a grout outlet 3b of the in-part grouting sleeve 3 are respectively communicated with the corresponding grouting hole 1a and grout outlet 1b, and the stress longitudinal rib 11 of the upper vertical prefabricated part 1 is inserted into the in-part grouting sleeve 3; the stress longitudinal ribs 211 of the lower layer structure 2 are inserted into the grouting sleeves 3 in the corresponding components of the upper layer vertical prefabricated components 1, and a slurry layer gap is reserved between the bottom surface of the upper layer vertical prefabricated components 1 and the top surface 2a of the lower layer structure 2; the periphery of the grout gap is sealed by the grout layer peripheral wall 4, so that the grout layer peripheral wall 4, the bottom surface of the upper vertical prefabricated component 1 and the top surface 2a of the lower structure 2 are surrounded to form a grout layer cavity communicated with the grouting sleeves 3 in each component, one of the grouting sleeves 3 is used as a grouting end grouting sleeve 3', grout flows into each component grouting sleeve 3 through the grout layer cavity after being injected through the grouting opening 3a of the grouting end grouting sleeve 3', and the grout layer peripheral wall 4 and the grouting material injected into the grout layer cavity form a grout layer.
The invention is characterized in that:
the parallel sleeve grouting detection structure comprises a blind hole 23a, a communication hole, a communication cavity 5, a detection grouting sleeve 6, a detection upper layer steel bar 7 and a detection lower layer steel bar 8;
the blind holes 23a are preset on the top surface 2a of the lower layer structure 2;
the communication hole is arranged on the peripheral wall 4 of the seat slurry layer and is positioned at the position farthest from the grouting sleeve 3' at the grouting end;
the communication cavity 5 is equipped with intercommunication mouth and via hole 5a, and the communication cavity 5 sets up on the top surface 2a of lower floor structure 2, and the top surface of communication cavity 5 and the bottom surface parallel and level of the vertical prefabricated component 1 of upper strata for: the inner cavity of the communication cavity 5 is communicated with the slurry layer cavity through a connected communication port and a communication hole, the through hole 5a is coaxial with the blind hole 23a of the lower layer structure 2, and the through hole 5a is communicated with the blind hole 23a of the lower layer structure 2 through the inner cavity of the communication cavity 5;
the upper layer steel bar 7 for detection and the lower layer steel bar 8 for detection are respectively inserted into an upper port and a lower port of the grouting sleeve 6 for detection, and the specification and the insertion depth of the upper layer steel bar 7 for detection and the lower layer steel bar 8 for detection are consistent with the specification and the insertion depth of the stress longitudinal bar 11 of the upper layer vertical prefabricated component 1 and the stress longitudinal bar 211 of the lower layer structure 2 and meet the requirement of the specification; and the lower layer steel bar 8 for detection is inserted into the blind hole 23a of the lower layer structure 2 through the through hole 5a of the communicating cavity 5, so that the grouting sleeve 6 for detection is located on the top surface of the communicating cavity 5, and the lower port of the grouting sleeve 6 for detection is communicated with the through hole 5a of the communicating cavity 5, so that the grouting material injected from the grouting port 3a of the grouting sleeve 3' at the grouting end flows into the grouting sleeve 6 for detection after sequentially passing through the cavity of the seat slurry layer and the inner cavity of the communicating cavity 5.
The invention also discloses a parallel sleeve grouting detection method for realizing the detection structure, which is also applicable to the connection structure of the upper vertical prefabricated component 1 and the lower structure 2, and the construction steps of the connection structure are as follows:
firstly, prefabricating an upper layer vertical prefabricated member 1, wherein an inner member grouting sleeve 3 is pre-embedded in the upper layer vertical prefabricated member 1, the inner member grouting sleeve 3 is exposed from the bottom surface of the upper layer vertical prefabricated member 1, grouting holes 1a and slurry outlets 1b are reserved in the upper layer vertical prefabricated member 1 for each inner member grouting sleeve 3, a grouting opening 3a and a slurry outlet 3b of the inner member grouting sleeve 3 are respectively communicated with the corresponding grouting holes 1a and slurry outlets 1b, and a stressed longitudinal rib 11 of the upper layer vertical prefabricated member 1 is inserted into the inner member grouting sleeve 3;
step two, completing construction of the lower layer structure 2 on a construction site, so that the stressed longitudinal ribs 211 of the lower layer structure 2 extend out from the top surface 2a of the lower layer structure;
step three, after the concrete of the lower layer structure 2 reaches enough strength, installing the upper layer vertical prefabricated component 1 so as to insert the stressed longitudinal ribs 211 of the lower layer structure 2 into the component inner grouting sleeves 3 corresponding to the upper layer vertical prefabricated component 1, and leaving a slurry layer gap between the bottom surface of the upper layer vertical prefabricated component 1 and the top surface 2a of the lower layer structure 2; in order to ensure a minimum height of the gap between the stock layers, support blocks can be placed on the top surface 2a of the lower structure 2 if necessary.
Step four, sealing the periphery of the seat slurry layer gap by using the seat slurry layer peripheral wall 4, so that the seat slurry layer peripheral wall 4, the bottom surface of the upper layer vertical prefabricated component 1 and the top surface 2a of the lower layer structure 2 form a seat slurry layer cavity communicated with the grouting sleeve 3 in each component;
step five, taking one member inner grouting sleeve 3 as a grouting end grouting sleeve 3', injecting grouting material from a grouting opening 3a of the grouting end grouting sleeve 3', plugging the grouting opening 3 a/the grouting opening 3b of the grouting material flowing out by using a professional plug in time when the grouting material flows out from the grouting opening 3a and the grouting opening 3b of the other member inner grouting sleeve 3 until all member inner grouting sleeves 3 comprise the grouting opening 3a and the grouting opening 3b of the grouting end grouting sleeve 3', so that the grouting material flows into each member inner grouting sleeve 3 through a seat grouting layer cavity, and the seat grouting layer peripheral wall 4 and the grouting material injected into the seat grouting layer cavity form a seat grouting layer;
and finally, after the grouting material and the slurry seat layer reach the strength required by construction, removing the support of the upper-layer vertical prefabricated component 1, and completing the construction by the connection structure of the upper-layer vertical prefabricated component 1 and the lower-layer structure 2.
The invention is characterized in that:
the parallel sleeve grouting detection method provided by the invention comprises the following steps:
step S1, reserving a blind hole 23a on the top surface 2a of the lower layer structure 2 in the step II;
step S2, reserving a communication hole on the peripheral wall 4 of the seat slurry layer, wherein the communication hole is positioned at the position farthest from the grouting sleeve 3' at the grouting end; and, set up intercommunication cavity 5 on the top surface 2a of lower floor structure 2, the top surface of this intercommunication cavity 5 and the bottom surface parallel and level of the vertical prefabricated component 1 of upper strata, and this intercommunication cavity 5 is equipped with intercommunication mouth and via hole 5a for: the inner cavity of the communication cavity 5 is communicated with the slurry layer cavity through a connected communication port and a communication hole, the through hole 5a is coaxial with the blind hole 23a of the lower layer structure 2, and the through hole 5a is communicated with the blind hole 23a of the lower layer structure 2 through the inner cavity of the communication cavity 5;
step S3, before implementing the step five, the upper layer steel bar 7 for detection and the lower layer steel bar 8 for detection are respectively inserted into an upper port and a lower port of the grouting sleeve 6 for detection, and the specification and the insertion depth of the upper layer steel bar 7 for detection and the lower layer steel bar 8 for detection are consistent with the specification of the stress longitudinal bar 11 of the upper layer vertical prefabricated component 1 and the stress longitudinal bar 211 of the lower layer structure 2 and the insertion depth of the grouting sleeve 3 in the component, so that the specification requirements are met; the lower layer steel bar 8 for detection is inserted into the blind hole 23a of the lower layer structure 2 through the through hole 5a of the communicating cavity 5, so that the grouting sleeve 6 for detection is located on the top surface of the communicating cavity 5, the lower port of the grouting sleeve 6 for detection is communicated with the through hole 5a of the communicating cavity 5, and the grouting sleeve 6 and the communicating cavity 5 are required to be ensured to be relatively fixed; such that: in the fifth step, the grouting material injected from the grouting opening 3a of the grouting end grouting sleeve 3' sequentially passes through the seat slurry layer cavity and the inner cavity of the communicating cavity 5 and then flows into the grouting sleeve 6 for detection;
and S4, after the step five is completed, the grouting material in the grouting sleeve 6 for detection reaches a certain strength, so that under the condition that the grouting material in the grouting sleeve 6 for detection is not influenced, the grouting sleeve 6 for detection, the upper layer steel bar 7 for detection and the lower layer steel bar 8 for detection are removed together, and the grouting material is waited to reach the design strength required by the effective connection of the stressed longitudinal bar 11 of the upper layer vertical prefabricated part 1 and the stressed longitudinal bar 211 of the lower layer structure 2 through the member inner grouting sleeve 3, the grouting material in the grouting sleeve 6 for detection is detected, whether the grouting material compactness and mechanical property of the grouting sleeve 3 in each member in the upper layer vertical prefabricated part 1 can reach the requirements of relevant specifications is judged, and accordingly, whether the connection quality of the stressed longitudinal bar 11 of the upper layer vertical prefabricated part 1 and the stressed longitudinal bar 211 of the lower layer structure 2 through the member inner grouting sleeve 3 is required or not is judged, wherein the waiting time for reaching the design strength is generally about 28 days, the grouting material compactness and mechanical property of the grouting sleeve 6 for detection can be fixed in the prior art, and the grouting material in the detection layer 7 for detection can be fixed in the detection layer and the detection method, and the auxiliary method is suitable for the detection of the steel bar performance in the detection layer 7.
Wherein, as a preferable embodiment of the invention: the communicating cavity 5 is composed of a communicating cavity peripheral wall and a top mold, the communicating cavity peripheral wall and the seat slurry layer peripheral wall 4 of the communicating cavity 5 are built by seat slurry with a sealing function, the top mold is fixed on the top surface of the communicating cavity peripheral wall, the top surface of the top mold is the top surface of the communicating cavity 5, and the through hole 5a is formed in the top mold.
The invention is suitable for the assembled building structure which adopts the grouting sleeve to realize the connection of the upper vertical prefabricated part and the lower structure, such as a frame structure, a precast concrete shear wall structure, a frame-shear wall structure and the like.
Thus, the upper layer vertical prefabricated parts 1 and the lower layer vertical prefabricated parts 21 can be prefabricated reinforced concrete columns or prefabricated reinforced concrete shear walls.
The lower layer structure 2 can be a reinforced concrete foundation, and also can be composed of a lower layer vertical prefabricated component 21, a superposed beam 22 and a superposed floor slab 23.
For the case where the substructure 2 consists of a lower vertical prefabricated element 21, a composite beam 22 and a composite floor 23:
the stress longitudinal ribs 211 of the lower layer structure 2 are the stress longitudinal ribs 211 of the lower layer vertical prefabricated member 21, the top surface 2a of the lower layer structure 2 is the top surface of the composite floor slab 23, the blind holes 23a of the lower layer structure 2 are arranged on the top surface of the composite floor slab 23, the blind holes 23a consist of floor slab blind holes and floor slab through holes, the floor slab blind holes are preset at the prefabricated part of the composite floor slab 23, and the floor slab through holes are reserved at the cast-in-situ part of the composite floor slab 23 and are coaxially communicated with the floor slab blind holes.
In the first step, the lower vertical prefabricated member 21, the prefabricated portion of the composite beam 22 and the prefabricated portion of the composite floor slab 23 should be prefabricated, wherein the prefabricated portion of the composite floor slab 23 is preset with a blind floor hole;
in the second step, the construction sequence of the lower layer structure 2 is as follows: firstly, mounting the lower layer vertical prefabricated part 21 in place; then installing the prefabricated part of the composite beam 22 and the prefabricated part of the composite floor slab 23, and binding the reinforcing steel bars of the cast-in-situ part of the composite beam 22 and the reinforcing steel bars of the cast-in-situ part of the composite floor slab 23; and casting and tamping the concrete of the cast-in-situ part of the composite beam 22 and the concrete of the cast-in-situ part of the composite floor slab 23, and reserving floor through holes at the cast-in-situ part of the composite floor slab 23.
The present invention is not limited to the above-described embodiments, and according to the above-described matters, the present invention may be modified, replaced or altered in various equivalent ways without departing from the basic technical spirit of the present invention, all falling within the scope of the present invention, according to the general technical knowledge and conventional means in the art. For example: the in-member grouting sleeve 3 and the detection grouting sleeve 6 of the present invention may be full grouting sleeves or half grouting sleeves.
Claims (8)
1. The utility model provides a parallel sleeve grout detects structure of vertical prefabricated component, is applicable to the connection structure of upper strata vertical prefabricated component (1) and lower floor's structure (2), wherein, atress longitudinal rib (211) of lower floor's structure (2) are stretched out from its top surface (2 a), upper strata vertical prefabricated component (1) pre-buried have in-building grout sleeve (3), this in-building grout sleeve (3) expose from the bottom surface of upper strata vertical prefabricated component (1), and upper strata vertical prefabricated component (1) are reserved for each in-building grout sleeve (3) grout hole (1 a) and grout outlet (1 b), make grout mouth (3 a) and grout outlet (3 b) of in-building grout sleeve (3) communicate corresponding grout hole (1 a) and grout outlet (1 b) respectively, and atress longitudinal rib (11) of upper strata vertical prefabricated component (1) inserts in-building interior grout sleeve (3); the stress longitudinal ribs (211) of the lower layer structure (2) are inserted into the member inner grouting sleeves (3) corresponding to the upper layer vertical prefabricated members (1), and a slurry layer gap is reserved between the bottom surface of the upper layer vertical prefabricated members (1) and the top surface (2 a) of the lower layer structure (2); the periphery of the seat slurry layer gap is sealed by a seat slurry layer peripheral wall (4), so that the seat slurry layer peripheral wall (4), the bottom surface of the upper layer vertical prefabricated component (1) and the top surface (2 a) of the lower layer structure (2) form a seat slurry layer cavity communicated with each component inner grouting sleeve (3), one component inner grouting sleeve (3) is used as a grouting end grouting sleeve (3 '), and grouting material flows into each component inner grouting sleeve (3) through the seat slurry layer cavity after being injected through a grouting opening (3 a) of the grouting end grouting sleeve (3');
the method is characterized in that:
the parallel sleeve grouting detection structure comprises a blind hole (23 a), a communication hole, a communication cavity (5), a detection grouting sleeve (6), a detection upper layer steel bar (7) and a detection lower layer steel bar (8);
the blind holes (23 a) are preset on the top surface (2 a) of the lower layer structure (2);
the communication hole is arranged on the peripheral wall (4) of the grouting layer and is positioned at the position farthest from the grouting sleeve (3') at the grouting end;
the communication cavity (5) is provided with a communication port and a via hole (5 a), the communication cavity (5) is arranged on the top surface (2 a) of the lower layer structure (2), and the top surface of the communication cavity (5) is flush with the bottom surface of the upper layer vertical prefabricated component (1), so that the upper layer vertical prefabricated component is provided with the following components: the inner cavity of the communication cavity (5) is communicated with the slurry layer cavity through the connected communication port and the communication hole, the through hole (5 a) is coaxial with the blind hole (23 a) of the lower layer structure (2), and the through hole (5 a) is communicated with the blind hole (23 a) of the lower layer structure (2) through the inner cavity of the communication cavity (5);
the upper layer steel bar (7) for detection and the lower layer steel bar (8) for detection are respectively inserted into an upper port and a lower port of the grouting sleeve (6) for detection, the lower layer steel bar (8) for detection is inserted into a blind hole (23 a) of the lower layer structure (2) through a via hole (5 a) of the communicating cavity (5), so that the grouting sleeve (6) for detection is located on the top surface of the communicating cavity (5), and the lower port of the grouting sleeve (6) for detection is communicated with the via hole (5 a) of the communicating cavity (5), so that grouting materials injected through a grouting port (3 a) of the grouting end grouting sleeve (3') sequentially pass through the grouting layer cavity and the inner cavity of the communicating cavity (5) and then flow into the grouting sleeve (6) for detection;
the communication cavity (5) consists of a communication cavity peripheral wall and a top mold, the communication cavity peripheral wall of the communication cavity (5) and the seat slurry layer peripheral wall (4) are built by seat slurry, the top mold is fixed on the top surface of the communication cavity peripheral wall, the top surface of the top mold is the top surface of the communication cavity (5), and the via hole (5 a) is arranged on the top mold;
the lower layer structure (2) comprises lower layer vertical prefabricated component (21), composite beam (22) and composite floor (23), atress longitudinal reinforcement (211) of lower floor structure (2) namely atress longitudinal reinforcement (211) of lower floor vertical prefabricated component (21), top surface (2 a) of lower floor structure (2) namely composite floor (23)'s top surface, blind hole (23 a) of lower floor structure (2) set up composite floor (23)'s top surface, and this blind hole (23 a) comprise floor blind hole and floor through-hole, the floor blind hole is preset composite floor (23)'s prefabricated part, the floor through-hole is reserved composite floor (23) cast-in-place part and with floor blind hole coaxial intercommunication.
2. The parallel sleeve grouting detection structure of a vertical prefabricated member according to claim 1, wherein: the lower layer structure (2) is a reinforced concrete foundation.
3. The parallel sleeve grouting detection structure of a vertical prefabricated member according to claim 1 or 2, wherein: the upper layer vertical prefabricated component (1) and the lower layer vertical prefabricated component (21) are prefabricated reinforced concrete columns or prefabricated reinforced concrete shear walls.
4. The parallel sleeve grouting detection method for the vertical prefabricated parts is realized based on the parallel sleeve grouting detection structure for the vertical prefabricated parts according to claim 1, and is suitable for a connection structure of an upper-layer vertical prefabricated part (1) and a lower-layer structure (2), and the construction steps of the connection structure are as follows:
prefabricating the upper layer vertical prefabricated component (1), wherein the upper layer vertical prefabricated component (1) is pre-embedded with a component inner grouting sleeve (3), the component inner grouting sleeve (3) is exposed from the bottom surface of the upper layer vertical prefabricated component (1), the upper layer vertical prefabricated component (1) is reserved with grouting holes (1 a) and grout outlet holes (1 b) for each component inner grouting sleeve (3), the grouting holes (3 a) and grout outlet holes (3 b) of the component inner grouting sleeve (3) are respectively communicated with the corresponding grouting holes (1 a) and grout outlet holes (1 b), and stress longitudinal ribs (11) of the upper layer vertical prefabricated component (1) are inserted into the component inner grouting sleeve (3);
step two, completing construction of the lower layer structure (2) on a construction site, so that the stressed longitudinal ribs (211) of the lower layer structure (2) extend out from the top surface (2 a) of the lower layer structure;
step three, installing the upper layer vertical prefabricated component (1) so as to insert the stressed longitudinal ribs (211) of the lower layer structure (2) into the component inner grouting sleeves (3) corresponding to the upper layer vertical prefabricated component (1), wherein a slurry seat gap is reserved between the bottom surface of the upper layer vertical prefabricated component (1) and the top surface (2 a) of the lower layer structure (2);
step four, the periphery of the seat slurry layer gap is sealed by a seat slurry layer peripheral wall (4), so that the seat slurry layer peripheral wall (4), the bottom surface of the upper layer vertical prefabricated component (1) and the top surface (2 a) of the lower layer structure (2) form a seat slurry layer cavity communicated with each grouting sleeve (3) in the component;
step five, taking one of the member inner grouting sleeves (3) as a grouting end grouting sleeve (3 '), and injecting grouting material from a grouting opening (3 a) of the grouting end grouting sleeve (3'), so that the grouting material flows into each member inner grouting sleeve (3) through the seat slurry layer cavity;
the method is characterized in that:
the parallel sleeve grouting detection method comprises the following steps:
step S1, reserving a blind hole (23 a) on the top surface (2 a) of the lower layer structure (2) in the step II;
s2, reserving a communication hole on the peripheral wall (4) of the grouting layer in the fourth step, wherein the communication hole is positioned at the position farthest from the grouting sleeve (3') at the grouting end; moreover, set up intercommunication cavity (5) on top surface (2 a) of lower floor structure (2), the top surface of this intercommunication cavity (5) with the bottom surface parallel and level of upper vertical prefabricated component (1), and this intercommunication cavity (5) are equipped with intercommunication mouth and via hole (5 a) for: the inner cavity of the communication cavity (5) is communicated with the slurry layer cavity through the connected communication port and the communication hole, the through hole (5 a) is coaxial with the blind hole (23 a) of the lower layer structure (2), and the through hole (5 a) is communicated with the blind hole (23 a) of the lower layer structure (2) through the inner cavity of the communication cavity (5);
step S3, before implementing the step V, respectively inserting an upper layer steel bar (7) for detection and a lower layer steel bar (8) for detection into an upper port and a lower port of a grouting sleeve (6) for detection, and inserting the lower layer steel bar (8) for detection into a blind hole (23 a) of the lower layer structure (2) through a via hole (5 a) of the communicating cavity (5), so that the grouting sleeve (6) for detection is located on the top surface of the communicating cavity (5), and the lower port of the grouting sleeve (6) for detection is communicated with the via hole (5 a) of the communicating cavity (5); such that: in the fifth step, the grouting material injected from the grouting opening (3 a) of the grouting end grouting sleeve (3') sequentially passes through the seat slurry layer cavity and the inner cavity of the communicating cavity (5) and then flows into the detection grouting sleeve (6);
and S4, after the step five is completed, removing the grouting sleeve (6) for detection, the upper layer steel bar (7) for detection and the lower layer steel bar (8) for detection together, and detecting the grouting material in the grouting sleeve (6) for detection when the grouting material reaches the required design strength of the stressed longitudinal bars (11) of the upper layer vertical prefabricated component (1) through the in-component grouting sleeve (3) and the stressed longitudinal bars (211) of the lower layer structure (2).
5. The method for detecting grouting of the parallel sleeve of the vertical prefabricated member according to claim 4, wherein the method comprises the following steps of: the communication cavity (5) comprises communication cavity perisporium and top mould, communication cavity perisporium of communication cavity (5) with seat thick liquid layer perisporium (4) is by the laying of seat thick liquid, the top surface of communication cavity perisporium is fixed to the top mould, the top surface of top mould is just the top surface of communication cavity (5), via hole (5 a) set up on the top mould.
6. The method for detecting grouting of the parallel sleeve of the vertical prefabricated member according to claim 4, wherein the method comprises the following steps of: the lower structure (2) consists of a lower vertical prefabricated part (21), a superposed beam (22) and a superposed floor slab (23), wherein a stress longitudinal rib (211) of the lower structure (2) is the stress longitudinal rib (211) of the lower vertical prefabricated part (21), a top surface (2 a) of the lower structure (2) is the top surface of the superposed floor slab (23), a blind hole (23 a) of the lower structure (2) is arranged on the top surface of the superposed floor slab (23), the blind hole (23 a) consists of a floor slab blind hole and a floor slab through hole, the floor slab blind hole is preset at a prefabricated part of the superposed floor slab (23), and the floor slab through hole is reserved at a cast-in-situ part of the superposed floor slab (23) and is coaxially communicated with the floor slab blind hole;
in the first step, the lower layer vertical prefabricated component (21), the prefabricated part of the superposed beam (22) and the prefabricated part of the superposed floor slab (23) are also prefabricated, wherein the prefabricated part of the superposed floor slab (23) is provided with the floor slab blind holes in advance;
in the second step, the construction sequence of the lower layer structure (2) is as follows: firstly, mounting the lower layer vertical prefabricated part (21) in place; then installing the prefabricated part of the superposed beam (22) and the prefabricated part of the superposed floor slab (23), and binding the reinforcing steel bars of the cast-in-situ part of the superposed beam (22) and the reinforcing steel bars of the cast-in-situ part of the superposed floor slab (23); and casting and tamping the concrete of the cast-in-situ part of the superposed beam (22) and the concrete of the cast-in-situ part of the superposed floor slab (23), and reserving the floor through holes at the cast-in-situ part of the superposed floor slab (23).
7. The method for detecting grouting of the parallel sleeve of the vertical prefabricated member according to claim 4, wherein the method comprises the following steps of: the lower layer structure (2) is a reinforced concrete foundation.
8. The parallel sleeve grouting detection method for the vertical prefabricated parts according to any one of claims 4 to 7, wherein: the upper layer vertical prefabricated component (1) and the lower layer vertical prefabricated component (21) are prefabricated reinforced concrete columns or prefabricated reinforced concrete shear walls.
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| CN109914805A (en) * | 2019-03-28 | 2019-06-21 | 上海宝冶集团有限公司 | A kind of low temperature sleeve grout construction method |
| CN110158969A (en) * | 2019-05-06 | 2019-08-23 | 河北建设集团股份有限公司 | A kind of construction method of low temperature environment fabricated shear wall |
| CN110424571A (en) * | 2019-07-29 | 2019-11-08 | 上海建工二建集团有限公司 | A kind of grout sleeve wall body structure and its quality determining method |
| CN113484346A (en) * | 2021-06-23 | 2021-10-08 | 苏州信安检测技术有限公司 | Method and system for detecting grouting defects inside metal grouting sleeve |
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