CN112504840A - Assembled type building sleeve grouting quality detection device and construction method thereof - Google Patents
Assembled type building sleeve grouting quality detection device and construction method thereof Download PDFInfo
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- CN112504840A CN112504840A CN202011343954.4A CN202011343954A CN112504840A CN 112504840 A CN112504840 A CN 112504840A CN 202011343954 A CN202011343954 A CN 202011343954A CN 112504840 A CN112504840 A CN 112504840A
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 239000011440 grout Substances 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 15
- 238000009864 tensile test Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010621 bar drawing Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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Abstract
The invention aims to disclose an assembled construction sleeve grouting quality detection device and a construction method thereof, wherein the assembled construction sleeve grouting quality detection device comprises at least 1 steel bar grouting sleeve, the lower part of the steel bar grouting sleeve is provided with a grouting opening, the upper part of the steel bar grouting sleeve is provided with a grout outlet, the grout outlet is provided with a horizontally arranged overhanging section, the upper part of the overhanging section is provided with a grout overflow hole, and an anti-pulling test steel bar is connected into the overhanging section; compared with the prior art, the horizontally arranged overhanging section is positioned at the topmost part of the steel bar grouting sleeve, whether the steel bar grouting sleeve is tightly grouted or not is judged by judging whether sufficient grout flows out of a grout overflow hole at the upper part of the overhanging section after grouting is finished, and the solid grouting strength is judged on the basis of the stress condition similar to the same condition by depending on a steel bar pulling-resistant strength test in the overhanging section after the grouting is finished to reach the strength, so that the aim of the invention is fulfilled.
Description
Technical Field
The invention relates to a grouting quality detection device and a construction method thereof, in particular to an assembly type construction sleeve grouting quality detection device and a construction method thereof.
Background
The prefabricated concrete structure ensures the overall stress performance of the structure through the connection of key parts such as prefabricated parts and prefabricated parts, prefabricated parts and post-cast concrete, parts and cast-in-place concrete and the like, and the selection of the connection technology is the most key link in the design. At present, because the design concept of equal cast-in-place is mainly adopted, the high-rise building basically adopts an assembled integral concrete structure, namely, an integral assembled concrete structure is formed by prefabricated components and on-site post-cast concrete, cement-based grouting materials and the like in a reliable connection mode. The connection mode of the stressed steel bars mainly comprises steel bar sleeve grouting connection and slurry anchor lap joint connection; the steel bar connection technology of lap joint, welding, mechanical connection and the like in the cast-in-place concrete structure can be used under the condition that the construction condition allows.
The steel bar sleeve is connected with the steel bar in a grouting mode through the metal sleeve, the high-strength, early-strength and micro-expandable cement-based grouting material is poured, positive acting force is generated between the surface of the steel bar and the inner side of the sleeve under the constraint effect of the sleeve with high rigidity on the micro-expandable grouting material, the steel bar generates friction force on the rough surface with ribs by means of the positive acting force, and therefore stress transmission between the stressed steel bars is achieved.
The sleeve can be divided into a full grouting sleeve and a half grouting sleeve. Wherein the sleeve of fully grouting means that the both ends of sleeve all insert the reinforcing bar and grout and form the integral connection, mainly used horizontal reinforcement's connection. The semi-grouting sleeve is mainly used for connecting vertical steel bars, one end of the sleeve is in threaded fastening connection with the connecting steel bars, and the other end of the sleeve is in grouting connection with the joint bars. The existing grouting fullness inspection of the semi-grouting sleeve connection mainly depends on grouting port injection at the lower part in the grouting process, and the grouting fullness in the sleeve is verified to meet the requirements through visual inspection of grout outlet at the upper part of the sleeve. Because the grouting material in the sleeve automatically sinks under the action of gravity. The grout will only overflow from the grout outlet at the highest point after the grout is full, and the principle is similar to the grouting operation in post-tensioned prestressed reinforcement. However, the method has the defects that grouting quality inspection has no reliable data, concrete grouting amount and fullness cannot be effectively confirmed, and local gaps cannot be displayed.
At present, technical means for detecting grouting fullness of the grouting sleeve connection by methods such as ultrasonic waves, infrared rays, ground penetrating radars, endoscopes and the like exist in the market. However, the measures are relatively complex, the large-scale application prospect in the field construction process is not good, and the measures are only adopted at the part needing rechecking locally. Therefore, in view of the current market situation, the grouting fullness detection of the grouting sleeve connection has a huge defect, and a nondestructive detection method for the strength of the steel bar connection entity in the hidden engineering is lacked.
Therefore, there is a need for a grouting quality detection device for an assembly type building sleeve and a construction method thereof, which can solve the existing problems.
Disclosure of Invention
The invention aims to provide an assembly type construction sleeve grouting quality detection device and a construction method thereof, aiming at the defects of the prior art, and effectively solving the problems of difficult operation, high detection difficulty, high cost and the like of the existing grouting compactness detection method.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the invention provides an assembled construction sleeve grouting quality detection device which is characterized by comprising at least 1 steel bar grouting sleeve, wherein a grouting opening is formed in the lower portion of each steel bar grouting sleeve, a grout outlet is formed in the upper portion of each steel bar grouting sleeve, a horizontally-arranged extending section is arranged on each grout outlet, a grout overflow hole is formed in the upper portion of each extending section, and anti-pulling test steel bars are connected into the extending sections.
In one embodiment of the invention, a blocking rubber ring is arranged between the outlet of the overhanging section and the tensile test steel bar.
In one embodiment of the present invention, the steel grouting sleeves are connected to each other through a lower grouting connection passage and an upper grouting connection passage, respectively.
Further, the lower grouting connection channel is arranged at the height position of the grouting opening, and the size of the lower grouting connection channel is the same as that of the grouting opening.
Further, the upper grouting connection channel is arranged at the height position of the grout outlet, and the size of the upper grouting connection channel is the same as that of the grout outlet.
In a second aspect, the invention provides a construction method of an assembly type construction sleeve grouting quality detection device, which is characterized by comprising the following steps:
(1) the steel bar grouting sleeves are installed in the concrete prefabricated part, the number of the steel bar connecting sleeves is reasonably arranged according to the steel bar requirement designed by the prefabricated part, and through connection is ensured;
(2) connecting the tensile test steel bar to the extending section to ensure that the extending length of the tensile test steel bar and the extending length of the extending section meet the tensile test requirement;
(3) grouting on site, namely injecting high-strength grouting material from a grouting opening at the lower part of the steel bar grouting sleeve, and continuously grouting after grouting pressure is reached;
(4) plugging the steel bars in the anti-drawing test, plugging the grout overflow hole and continuously grouting for 30s after the grout is continuously blown out from the grout overflow hole, so as to ensure that the grouting is compact;
(5) and after the grouting material reaches the strength (maintained for 28 days), performing a drawing resistance test on the steel bar in the drawing resistance test, and judging whether the grouting solid strength of the steel bar grouting sleeve meets the design requirement or not according to the test result of the drawing resistance strength of the steel bar.
Compared with the prior art, the horizontally arranged overhanging section is positioned at the topmost part of the steel bar grouting sleeve, whether the steel bar grouting sleeve is tightly grouted or not is judged according to whether sufficient grout flows out of grout overflow holes in the upper part of the overhanging section after grouting is finished, and the solid grouting strength is judged according to a steel bar pulling-resistant strength test in the overhanging section after the grouting is finished to reach the strength on the basis of the stress condition similar to the same condition, so that the aim of the invention is fulfilled.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
Fig. 1 is a schematic structural view of an assembly type construction sleeve grouting quality detection device according to the present invention;
fig. 2 is a schematic structural diagram of another form of the prefabricated construction sleeve grouting quality detection device according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Examples
As shown in fig. 1 and 2, the grouting quality detection device for the assembled construction sleeve of the present invention includes at least 1 steel bar grouting sleeve 10, a grouting opening 20 is provided at the lower part of the steel bar grouting sleeve 10, a grout outlet 30 is provided at the upper part of the steel bar grouting sleeve 10, an extension section 40 horizontally provided is provided at the grout outlet 30, a grout outlet 41 is provided at the upper part of the extension section 40, and a tensile test steel bar 50 is inserted into the extension section 40.
In this embodiment, a blocking rubber ring is provided between the outlet of the overhanging section 40 and the anti-pulling test steel bar 50.
The steel grouting sleeve 10 is divided into two types of a single sleeve and a combined type multiple sleeve.
Wherein, single steel bar grout sleeve 10 mainly corresponds overhanging section 40 for a vertical reinforcing bar, and it is great to be applicable to more important vertical structure reinforcing bar or adjacent reinforcing bar interval, sets up sleeve intercommunication way distance far away, blocks up the reinforcing bar of scheduling problem easily, does not communicate between the different steel bar grout sleeves, and single sleeve grout alone and carry out the anti-drawing detection alone.
In another mode, the combined type multiple steel bar grouting sleeve 10 is mainly characterized in that a lower grouting connection channel 21 and an upper grouting connection channel 31 are arranged between the steel bar grouting sleeve 10 and the steel bar grouting sleeve 10 on the basis of different single sleeves, the multiple steel bar grouting sleeves 10 share one grouting opening 20 and one grout outlet 30, and the same anti-pulling test steel bar 50 is adopted for anti-pulling test to detect the grouting compactness of the whole combined type sleeve.
The lower grouting connection channel 21 is arranged at the height position of the grouting opening 20, the size of the lower grouting connection channel 21 is the same as that of the grouting opening 20, the upper grouting connection channel 31 is arranged at the height position of the grout outlet 30, and the size of the upper grouting connection channel 31 is the same as that of the grout outlet 30. The method is suitable for forming or a plurality of steel bar structures.
The construction method of the assembly type construction sleeve grouting quality detection device comprises the following steps:
(1) installing the steel bar grouting sleeves 10 in the concrete prefabricated part, reasonably arranging the number of the steel bar connecting sleeves 10 according to the steel bar requirement designed by the prefabricated part, and ensuring through connection;
(2) the tensile test steel bar 50 is connected into the overhanging section 40, so that the extending length of the tensile test steel bar 50 and the overhanging length of the overhanging section 40 meet the tensile test requirement;
(3) grouting on site, namely injecting high-strength grouting material from a grouting opening 20 at the lower part of the steel bar grouting sleeve 10, and continuously grouting after grouting pressure is reached;
(4) plugging the anti-drawing test steel bars 50, plugging the grout overflow holes 41 and continuously grouting for 30s after the grout is continuously blown out from the grout overflow holes 41, and ensuring that the grouting is compact;
(5) after the grouting material reaches the strength (maintained for 28 days), the anti-drawing test steel bar 50 is subjected to the anti-drawing test, and whether the grouting solid strength of the steel bar grouting sleeve meets the design requirement is judged according to the steel bar anti-drawing strength test result; when the anti-pulling test of the anti-pulling test steel bar 50 meets the requirements, the combination of the high-strength grouting material in the upper grout outlet 30 and the steel bar is proved to be tight, the relevant requirements are met, according to the gravity principle of the grouting material, the grouting material at the upper part is compact, and the grouting material at the lower part is certainly compact, so that the grouting inside the whole sleeve is proved to be compact.
According to the grouting quality detection device for the prefabricated building sleeve and the construction method thereof, the existing steel bar grouting sleeve is adjusted and optimized, and a mode that a part of the upper grout outlet is horizontally reserved outside a concrete structure is added, so that the grouting compactness of the whole sleeve can be conveniently detected by performing a pull-resistant test on the whole formed by the steel bars and the sleeve at the grout outlet in the later period.
The grout inlet of the steel bar grouting sleeve is still arranged at the lower part, after grouting is completed, the steel bar is drawn in the grout upper part overhanging sleeve by using the steel bar drawing principle, when the drawing force is more than or equal to the corresponding standard requirement, the whole quality formed by the steel bar in the upper part sleeve meets the requirement, and the gravity action of grouting material is utilized to prove that the grout in the vertical steel bar grouting sleeve closely meets the design requirement.
On one hand, the quality of the steel bar grouting sleeve is detected in a horizontal drawing mode without performing destructive drawing detection on the steel bar grouting sleeve or detecting the grouting compactness degree by adopting a very complicated and expensive means as before; on the other hand, the accurate measurement on the numerical value of the whole system formed after the steel bar and the sleeve are connected by grouting can be carried out by adopting a specific drawing data method, and the size of the whole tensile strength formed after the steel bar is connected with the sleeve by grouting is proved from the source.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (6)
1. The grouting quality detection device for the assembled building sleeve is characterized by comprising at least 1 steel bar grouting sleeve, wherein a grouting opening is formed in the lower portion of the steel bar grouting sleeve, a grout outlet is formed in the upper portion of the steel bar grouting sleeve, an horizontally-arranged extending section is arranged on the grout outlet, a grout overflow hole is formed in the upper portion of the extending section, and anti-pulling test steel bars are connected into the extending section.
2. The assembly type structure sleeve grouting quality detection device as claimed in claim 1, wherein a blocking rubber ring is arranged between the outlet of the overhanging section and the anti-pulling test steel bar.
3. The assembly type construction sleeve grouting quality detection device of claim 1, wherein the steel bar grouting sleeves are connected with each other through a lower grouting connection passage and an upper grouting connection passage, respectively.
4. The prefabricated construction sleeve grouting quality detection device of claim 3, wherein the lower grouting connection passage is provided at a height position of the grouting port, and the size of the lower grouting connection passage is the same as that of the grouting port.
5. The assembly type construction sleeve grouting quality detection device according to claim 3, wherein the upper grouting connection passage is provided at a height position of the grout outlet, and the size of the upper grouting connection passage is the same as that of the grout outlet.
6. A construction method of an assembly type construction sleeve grouting quality detection device is characterized by comprising the following steps:
(1) the steel bar grouting sleeves are installed in the concrete prefabricated part, the number of the steel bar connecting sleeves is reasonably arranged according to the steel bar requirement designed by the prefabricated part, and through connection is ensured;
(2) connecting the tensile test steel bar to the extending section to ensure that the extending length of the tensile test steel bar and the extending length of the extending section meet the tensile test requirement;
(3) grouting on site, namely injecting high-strength grouting material from a grouting opening at the lower part of the steel bar grouting sleeve, and continuously grouting after grouting pressure is reached;
(4) plugging the steel bars in the anti-drawing test, plugging the grout overflow hole and continuously grouting for 30s after the grout is continuously blown out from the grout overflow hole, so as to ensure that the grouting is compact;
(5) and after the grouting material reaches the strength, performing a drawing resistance test on the steel bar in the drawing resistance test, and judging whether the grouting solid strength of the steel bar grouting sleeve meets the design requirement or not according to the test result of the drawing resistance strength of the steel bar.
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| CN202011343954.4A CN112504840A (en) | 2020-11-26 | 2020-11-26 | Assembled type building sleeve grouting quality detection device and construction method thereof |
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| CN202011343954.4A CN112504840A (en) | 2020-11-26 | 2020-11-26 | Assembled type building sleeve grouting quality detection device and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459906A (en) * | 2022-04-12 | 2022-05-10 | 昆山市建设工程质量检测中心 | Method for testing weldability of full grouting sleeve and steel bar |
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| CN211528240U (en) * | 2019-11-04 | 2020-09-18 | 杭州都市高速公路有限公司 | Visual device for inspecting grouting compactness of prefabricated concrete structure sleeve |
| CN211505539U (en) * | 2020-02-25 | 2020-09-15 | 中建三局第三建设工程有限责任公司 | Assembled wall body grout plumpness verifying attachment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459906A (en) * | 2022-04-12 | 2022-05-10 | 昆山市建设工程质量检测中心 | Method for testing weldability of full grouting sleeve and steel bar |
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