CN113030098B - Method for detecting and processing sleeve connection reinforcing steel bar cutoff - Google Patents
Method for detecting and processing sleeve connection reinforcing steel bar cutoff Download PDFInfo
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- CN113030098B CN113030098B CN202110215501.1A CN202110215501A CN113030098B CN 113030098 B CN113030098 B CN 113030098B CN 202110215501 A CN202110215501 A CN 202110215501A CN 113030098 B CN113030098 B CN 113030098B
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- 238000000034 method Methods 0.000 title claims description 33
- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims description 25
- 238000012545 processing Methods 0.000 title claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 114
- 239000010959 steel Substances 0.000 claims abstract description 114
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 238000004080 punching Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000003116 impacting effect Effects 0.000 claims description 2
- 238000003672 processing method Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 5
- 239000011440 grout Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000012966 insertion method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a detection and processing method for sleeve connection steel bar cutoff, which comprises the following steps of S1, determining a detection range: covering a specified length range to two sides of the sleeve along the communication cavity by taking the sleeve as the center; s2, opening a communication cavity: a communicating cavity is opened at one side close to the sleeve connecting steel bar; s3, detection and judgment: judging by applying force to the steel bars inserted into the sleeve, and if the steel bars inserted into the sleeve are movable, directly judging that the steel bars are cut off; if the steel bar inserted into the sleeve cannot move, observing whether cutting marks exist in the range of two sides of the sleeve connecting the steel bar by means of an endoscope or a flashlight in the opened communication cavity, and judging that the steel bar is cut by finding the cutting marks; s4, repairing treatment. Meanwhile, the invention also provides detection and treatment steps after grouting. The invention can detect the cutting-off condition of the concealed sleeve connecting steel bars, provides a targeted processing method and plays an important role in ensuring the quality of the steel bar joint.
Description
Technical Field
The invention relates to a detection and treatment method for cutting off sleeve connection reinforcing steel bars, wherein the cutting-off positions of the reinforcing steel bars can be found through detection, and the stress performance of reinforcing steel bar joints can be recovered through treatment. Belongs to the field of assembled concrete structure construction technology.
Disclosure of Invention
In recent years, china is greatly pushing the development of assembled buildings, wherein an assembled concrete structure is a main structural type, and vertical members of the structural type are mainly connected by grouting steel bar sleeves. The sleeve is divided into a full grouting sleeve and a half grouting sleeve. The upper section of steel bars and the lower section of steel bars in the full grouting sleeve are connected through grouting materials; the upper section of steel bar in the half grouting sleeve is connected through screw threads, and the lower section of steel bar is connected through grouting materials. Whether it is full grout sleeve or half grout sleeve, the upper segment reinforcing bar is in the sleeve and is accomplished the installation at the component factory, and construction precision guarantees easily, but the lower segment reinforcing bar is all accomplished the installation at job site, owing to there is construction deviation, and the lower segment reinforcing bar deviates from sleeve position easily, can't insert inside the sleeve, and under this case, the workman can cut off the reinforcing bar sometimes, and this is not allowed in the engineering. If the steel bar is cut off, the worker throws away the cut steel bar, the lower section of steel bar does not exist in the sleeve, and the steel bar can extend into the endoscope probe for detection through the sleeve grouting hole before grouting; after grouting, the grouting hole of the sleeve can be detected by a drilling endoscopic method or by an X-ray digital imaging method. However, in practical engineering, another situation exists that after the worker cuts the steel bar, the worker still places the steel bar in the sleeve, and an 'artifact' that the steel bar is not cut is generated. Possible placement modes include two types: ① The lower end of the steel bar is not fixed and the upper end is directly inserted into the sleeve when the steel bar deviates from the original position of the steel bar, and the position of the steel bar in the sleeve can be offset; ② And (3) deviating from the original position of the steel bar, punching a shallow hole in the floor slab right below the sleeve, then inserting the lower end of the steel bar into the shallow hole, and inserting the upper end into the sleeve, wherein the steel bar can be kept in an upright state in the sleeve. For the two cases, before grouting and after grouting, if the steel bar is detected by an endoscope method or an X-ray method, misjudgment is caused if the steel bar is found to be normal. Therefore, a more accurate detection method needs to be found, so that the cutting position of the steel bar is ensured to be found, and the correct judgment is made. There are two methods of treatment currently disclosed: the utility model discloses a reinforcing structure of a precast shear wall member with an inner sleeve grouting connection steel bar cut-off and a construction method thereof, which is disclosed in the publication No. CN108952018A, adopts an indirect reinforcing method instead of a sleeve joint for cutting off the steel bar, and has a large reinforcing range; the utility model discloses a reinforced structure and construction method to the reinforcing bar is cut in the sleeve that is connected to the open number CN111350311A, and its focus cuts the sleeve joint of reinforcing bar, adopts direct repair method, and additional connecting bar one end welds on the reinforcing bar that cuts, and the other end welds in the sleeve outside, but to the full grout sleeve that uses a lot of wide, often adopts cast iron forging, and the weldability is relatively poor, if welding process is improper, can cause further damage to the joint on the contrary. Therefore, for the sleeve joint of the truncated reinforcing steel bar, a more feasible detection and repair treatment method is urgently required.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for detecting and processing sleeve connection reinforcing steel bar interception. When the lower section of steel bars in the sleeve are found to still exist but the actual sleeve position is obviously different from the drawing, or the lower section of steel bars in the sleeve are found to still exist but the actual steel bars are obviously shortened or inclined, the detection and processing work of sleeve connection steel bar interception can be started.
The invention adopts the following technical scheme:
A detection and treatment method for sleeve connection steel bar cutoff aims at the detection and treatment steps before grouting:
s1, determining a detection range: covering a specified length range to two sides of the sleeve along the communication cavity by taking the sleeve as the center;
S2, opening a communication cavity: according to the determined detection length range, a communication cavity is opened at one side close to the sleeve connecting steel bar, and plugging materials in the communication cavity are cleaned;
S3, detection and judgment: judging by applying force to the steel bars inserted into the sleeve, and if the steel bars inserted into the sleeve are movable, directly judging that the steel bars are cut off; if the steel bar inserted into the sleeve cannot move, observing whether cutting marks exist in the range of two sides of the sleeve connecting the steel bar by means of an endoscope or a flashlight in the opened communication cavity, and judging that the steel bar is cut once the cutting marks are found;
S4, repairing treatment.
Preferably, in step S4, a method of slot insertion is adopted: the repair treatment method for slotting insertion specifically comprises the following steps:
S41, punching holes right below the bottom of the sleeve to penetrate through the floor slab, and then grooving downwards along the lower wall body;
S42, taking out original cut-off steel bars, putting steel bars with the same strength grade and the same diameter as the cut-off steel bars into grooves of the lower wall body, and inserting the steel bars into sleeves after penetrating through holes of the floor slab;
S43, processing the grooving position of the lower wall body and the opening position of the floor slab by using high-strength mortar materials to strengthen and strengthen;
s44, plugging the communication cavity at the opening part by using an original plugging material, and preparing for subsequent grouting.
Further, in the detection range, the length range covered towards the two sides of the sleeve along the communication cavity covers each side of the sleeve to be not less than 100mm.
A detection and treatment method for sleeve connection steel bar cutoff aims at the detection and treatment steps after grouting:
A1, determining a detection range: covering a specified length range to two sides of the sleeve along the communication cavity by taking the sleeve as the center;
a2, opening a communication cavity: according to the specified detection length range, a communication cavity is opened at one side close to the sleeve connecting steel bar, and grouting materials in the position range of the communication cavity plugging material and the covering steel bar are cleaned completely;
A3, detection and judgment: in the opened communicating cavity, carefully observing whether cutting marks exist in the range of the two sides of the sleeve connecting reinforcing steel bars by means of an endoscope or a flashlight, and judging that the reinforcing steel bars are cut once the cutting marks are found; if no cutting mark is found, the impact drill is used for impacting the concrete at the root of the steel bar, and if the steel bar is discontinuous after impact, the steel bar can be judged to be cut;
And A4, repairing treatment.
Preferably, in step A4, the following method of planting and welding is adopted: the method specifically comprises the following steps:
A41, grooving along the upper wall body upwards from the bottom of the sleeve to expose the whole sleeve;
A42, cutting off the reinforcing steel bars positioned at the top part of the sleeve, and taking out the sleeve in the upper and lower cutting-off position range of the reinforcing steel bars;
A43, punching downwards to a certain depth along the cutting-off position of the steel bars at the bottom of the sleeve, and continuously grooving upwards to a certain length along the cutting-off position of the steel bars at the top of the sleeve, so as to further expose the steel bars in the wall body at the upper part of the sleeve;
A44, adopting the steel bars with the same strength grade and the same diameter as the truncated steel bars, planting the steel bars downwards along the punching position, and welding the steel bars upwards along the slotting position with the steel bars in the upper wall body;
A45, sealing the whole slotting by using a high-strength mortar material, reinforcing and reinforcing, and sealing the communication cavity at the opening by using the primary grouting material and the plugging material.
The invention has the beneficial effects that: the method can effectively detect the cutting-off condition of the hidden sleeve connection reinforcing steel bars in actual engineering, provides a targeted treatment method, and has important significance for guaranteeing the quality of the reinforcing steel bar joints and promoting the healthy development of the fabricated concrete building.
Drawings
Fig. 1 is a flowchart of a method for detecting and processing the cut-off of sleeve connection steel bars;
Fig. 2 is a schematic view of the sleeve connecting bar being inserted directly into the sleeve without fixation after being cut off;
FIG. 3 is a schematic view of the sleeve connecting steel bar being inserted into the sleeve after being cut off and fixed through a shallow hole;
Fig. 4 is a schematic diagram of a grooving insertion repairing method before grouting for cutting off sleeve connection steel bars;
Fig. 5 is a schematic diagram of a lower-planting upper-welding repair method after grouting, wherein sleeve connection steel bars are cut off.
1-Upper wall, 2-communicating cavity, 3-floor, 4-lower wall, 5-sleeve, 6-upper wall inserts the reinforcing bar in the sleeve, 71-does not do fixed reinforcing bar of inserting the sleeve directly, 72-insert the reinforcing bar of sleeve after fixed through the shallow hole, 73-the reinforcing bar of fluting insert, 74-plant the reinforcing bar of welding down, 8-reinforcing bar in the lower wall, 9-the shallow hole of beating in the floor under the sleeve bottom, 10-the trompil of floor under the sleeve bottom, 11-the trompil passes the downward fluting of lower wall behind the floor under the sleeve bottom, 12-the deep hole of beating in floor and lower wall under the sleeve bottom, 13-the fluting of upper wall along the sleeve upwards.
Detailed Description
The invention will be described in further detail with reference to figures 1-5 and examples.
Example 1: detection and treatment before grouting of sleeve connection reinforcing steel bar cutoff:
And a certain precast concrete shear wall structure is connected by sleeve grouting, and a communicating cavity grouting mode is adopted, so that grouting is not performed. The sleeve 5 in the upper wall 1 is offset from the reinforcing bars 8 in the lower wall 4, and the reinforcing bars 8 are cut off to form reinforcing bars 71 which are directly inserted into the sleeve without fixing. The cutting condition of the steel bars is detected and targeted treatment is carried out. With reference to fig. 1, 2 and 4, the specific steps are as follows:
(1) And (5) determining a detection range. The sleeve 5 is taken as the center, and the range of 100mm is covered to both sides of the sleeve 5 along the communication cavity 2.
(2) The communication chamber is opened. According to the determined detection length range, the communicating cavity 2 is opened at one side close to the sleeve 5 and the connecting steel bar 71, and the blocking material of the communicating cavity 2 is cleaned.
(3) And (5) detection and judgment. When the reinforcing bars 71 inserted into the sleeve 5 are found to be movable by observation after the communication chamber 2 is opened, it is directly determined that the reinforcing bars 8 are cut.
(4) And (5) repairing treatment. Because the sleeve 5 is not grouted, repairing treatment is carried out by adopting a slotting insertion method, and the method specifically comprises the following steps: ① Punching 10 right below the bottom of the sleeve 5, penetrating through the floor slab 3, and then grooving 11 downwards along the lower wall 4; ② Taking out the original cut-off steel bars 71, putting steel bars 73 with the same strength grade and the same diameter as the cut-off steel bars 71 into the grooves 11 of the lower wall 4, and inserting the steel bars 73 into the sleeve 5 after penetrating through the holes 10 of the floor slab 3; ③ The lower wall grooving 11 and the floor slab opening 10 are treated by high-strength mortar materials to be reinforced; ④ And plugging the communication cavity 2 at the opening part by using an original plugging material to prepare for subsequent grouting.
Example 2: detection and treatment after grouting of sleeve connection reinforcing steel bar cutoff:
And (3) grouting a certain precast concrete shear wall structure by adopting a sleeve grouting connection and a communicating cavity grouting mode for more than 3 days. The sleeve 5 in the upper wall 1 is deviated from the steel bars 8 in the lower wall 4, and the steel bars 8 are cut off to form steel bars 72 which are fixed through the shallow holes 9 and then inserted into the sleeve. The cutting condition of the steel bars is detected and targeted treatment is carried out. With reference to fig. 1,3 and 5, the specific steps are as follows:
(1) And (5) determining a detection range. The sleeve 5 is taken as the center, and the range of 100mm is covered to both sides of the sleeve 5 along the communication cavity 2.
(2) The communication chamber is opened. According to the determined detection length range, the communication cavity 2 is opened at one side close to the sleeve 5 and connected with the reinforcing steel bars 72, and the blocking material of the communication cavity 2 and the grouting material covering the position range of the reinforcing steel bars 72 are completely cleaned.
(3) And (5) detection and judgment. In the opened communicating cavity 2, the concrete at the root of the reinforcing steel bar 72 is directly impacted by an impact drill, and the reinforcing steel bar 72 is found to be discontinuous after impact, so that the reinforcing steel bar 8 is judged to be cut off.
(4) And (5) repairing treatment. Because the sleeve 5 is grouted for more than 3 days, a method of welding by implantation is adopted, and the method specifically comprises the following steps: ① Grooving 13 from the bottom of the sleeve 5 upwards along the upper wall 1 to expose the whole sleeve 5; ② Cutting off the steel bars 6 at the top of the sleeve 5, and taking out the sleeve 5 within the cutting range of the upper steel bars and the lower steel bars; ③ Punching 12 downwards along the cutting position of the steel bars 72 at the bottom of the sleeve 5 to a certain depth, continuously grooving 13 upwards along the cutting position of the steel bars 6 at the top of the sleeve 5 to a certain length, and further exposing the steel bars 6 in the wall body at the upper part of the sleeve 5; ④ Adopting the steel bars 74 with the same strength grade and the same diameter as the truncated steel bars 72, planting the steel bars downwards along the punching 12, welding the steel bars upwards along the slotting 13 with the steel bars 6 in the upper wall body, wherein the planting depth and welding overlap joint length meet the standard requirements; ⑤ The whole slot 13 is sealed by high-strength mortar material for reinforcement, and the communication cavity 2 at the opening is sealed by primary grouting material and plugging material.
The above embodiments 1 and 2 are alternative embodiments of the present invention, and those skilled in the art can make various changes or modifications thereto without departing from the general inventive concept, and the changes or modifications shall fall within the scope of the present invention as claimed.
Claims (2)
1. A detection and treatment method for sleeve connection steel bar cutoff is characterized by comprising the following steps:
aiming at the detection and treatment steps before grouting:
s1, determining a detection range: covering a specified length range to two sides of the sleeve along the communication cavity by taking the sleeve as the center;
S2, opening a communication cavity: according to the determined detection length range, a communication cavity is opened at one side close to the sleeve connecting steel bar, and plugging materials in the communication cavity are cleaned;
S3, detection and judgment: judging by applying force to the steel bars inserted into the sleeve, and if the steel bars inserted into the sleeve are movable, directly judging that the steel bars are cut off; if the steel bar inserted into the sleeve cannot move, observing whether cutting marks exist in the range of two sides of the sleeve connecting the steel bar by means of an endoscope or a flashlight in the opened communication cavity, and judging that the steel bar is cut once the cutting marks are found;
S4, repairing: the method of slot insertion is adopted: the repair treatment method for slotting insertion specifically comprises the following steps:
S41, punching holes right below the bottom of the sleeve to penetrate through the floor slab, and then grooving downwards along the lower wall body;
S42, taking out original cut-off steel bars, putting steel bars with the same strength grade and the same diameter as the cut-off steel bars into grooves of the lower wall body, and inserting the steel bars into sleeves after penetrating through holes of the floor slab;
S43, processing the grooving position of the lower wall body and the opening position of the floor slab by using high-strength mortar materials to strengthen and strengthen;
s44, plugging the communication cavity at the opening part by using an original plugging material to prepare for subsequent grouting;
Aiming at the detection and treatment steps after grouting:
A1, determining a detection range: covering a specified length range to two sides of the sleeve along the communication cavity by taking the sleeve as the center;
a2, opening a communication cavity: according to the specified detection length range, a communication cavity is opened at one side close to the sleeve connecting steel bar, and grouting materials in the position range of the communication cavity plugging material and the covering steel bar are cleaned completely;
A3, detection and judgment: in the opened communicating cavity, carefully observing whether cutting marks exist in the range of the two sides of the sleeve connecting reinforcing steel bars by means of an endoscope or a flashlight, and judging that the reinforcing steel bars are cut once the cutting marks are found; if no cutting mark is found, the impact drill is used for impacting the concrete at the root of the steel bar, and if the steel bar is discontinuous after impact, the steel bar can be judged to be cut;
a4, repairing: the method of the following planting and welding is adopted: the method specifically comprises the following steps:
A41, grooving along the upper wall body upwards from the bottom of the sleeve to expose the whole sleeve;
A42, cutting off the reinforcing steel bars positioned at the top part of the sleeve, and taking out the sleeve in the upper and lower cutting-off position range of the reinforcing steel bars;
A43, punching downwards to a certain depth along the cutting-off position of the steel bars at the bottom of the sleeve, and continuously grooving upwards to a certain length along the cutting-off position of the steel bars at the top of the sleeve, so as to further expose the steel bars in the wall body at the upper part of the sleeve;
A44, adopting the steel bars with the same strength grade and the same diameter as the truncated steel bars, planting the steel bars downwards along the punching position, and welding the steel bars upwards along the slotting position with the steel bars in the upper wall body;
A45, sealing the whole slotting by using a high-strength mortar material, reinforcing and reinforcing, and sealing the communication cavity at the opening by using the primary grouting material and the plugging material.
2. The method for detecting and processing the interception of the sleeve joint reinforcing steel bar according to claim 1, wherein the method comprises the following steps: in the detection range, the length range covered along the communication cavity to the two sides of the sleeve covers each side of the sleeve to be not less than 100mm.
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| CN202110215501.1A CN113030098B (en) | 2021-02-26 | 2021-02-26 | Method for detecting and processing sleeve connection reinforcing steel bar cutoff |
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| CN202110215501.1A CN113030098B (en) | 2021-02-26 | 2021-02-26 | Method for detecting and processing sleeve connection reinforcing steel bar cutoff |
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| CN114839013B (en) * | 2022-04-20 | 2022-12-02 | 昆山市建设工程质量检测中心 | Special test piece for testing weldability of steel bar and semi-grouting sleeve and testing method |
| CN114965467B (en) * | 2022-05-10 | 2023-04-25 | 昆山市建设工程质量检测中心 | Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection |
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