CN114319727B - Self-locking type steel bar connection grouting sleeve and construction method thereof - Google Patents
Self-locking type steel bar connection grouting sleeve and construction method thereof Download PDFInfo
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- CN114319727B CN114319727B CN202210120788.4A CN202210120788A CN114319727B CN 114319727 B CN114319727 B CN 114319727B CN 202210120788 A CN202210120788 A CN 202210120788A CN 114319727 B CN114319727 B CN 114319727B
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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
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Abstract
The invention discloses a self-locking steel bar connection grouting sleeve and a construction method thereof, and the technical scheme is as follows: from locking-type steel bar connection grout sleeve, including being used for connecting two steel bar sleeve of treating the splice bar, two treat that the splice bar follows respectively the steel bar sleeve's both ends insert, be provided with in the steel bar sleeve and block treat the self-lock device that the splice bar moved back, the slip casting hole has been seted up to steel bar sleeve's bottom, the grout overflow hole has been seted up at steel bar sleeve's top, the steel bar sleeve intussuseption is filled with grout material, steel bar sleeve and two treat that the splice bar handing-over department all is equipped with the hole stopper of closing at both ends about, steel bar sleeve's inner wall surface is equipped with the rough surface of the three angle cones with sleeve vertical center line symmetry, and this device can improve steel bar connection intensity, has very big joint strength.
Description
Technical Field
The invention relates to the field of building construction, in particular to a self-locking steel bar connection grouting sleeve and a construction method thereof.
Background
Summarizing the construction development of the assembled building in China, the traditional steel bar connecting sleeve connecting mechanism mainly utilizes the surrounding action of mortar on a sleeve and the micro-expansion characteristic of grouting material to enhance the positive acting force between the mortar and the steel bar and the inner side of the sleeve, and the steel bar transmits the stress of the steel bar by the friction action between the positive acting force and the sleeve. According to the standard requirement, the tensile strength of the steel bar sleeve grouting connection joint is not less than the standard value of the tensile strength of the connection steel bar, and the steel bar is broken at the position of the steel bar outside the joint during damage, and years of practical application and experimental verification show that the damage form of the steel bar connection sleeve in China is mostly failed due to the fact that the steel bar sleeve is damaged and the steel bar is pulled out of the sleeve, so that the application and the engineering quality of engineering projects are seriously affected. Simultaneously, steel sleeve grout connects construction belongs to "hidden engineering", it is big to check and accept the degree of difficulty, construction quality receives operating personnel level to influence seriously, grout operation plumpness has decided the steel bar connection quality at to a great extent, often should operating personnel technical merit and operation custom, lead to the construction process grout process "false full" phenomenon to appear, the steel bar connection intensity has been reduced, finally extract and become invalid from the sleeve with the reinforcing bar more, how improve steel sleeve application function, guarantee steel bar connection quality, become an important subject that current trade development needs to solve urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a self-locking type steel bar connection grouting sleeve and a construction method thereof, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a from locking-type steel bar connection grout sleeve, is including being used for connecting two steel bar sleeve of treating the splice bar, two treat the splice bar and follow respectively the grout hole has been seted up to steel bar sleeve's both ends and has been inserted, be provided with in the steel bar sleeve and block treat the self-lock device that the splice bar moved back, the slip casting hole has been seted up to steel bar sleeve's bottom, the grout hole has been seted up at steel bar sleeve's top, the steel bar sleeve intussuseption is filled with grout material, steel bar sleeve and two treat that both ends all are equipped with the hole stopper of closing about splice bar handing-over department, steel bar sleeve's inner wall surface is equipped with the rough surface of three inverted pyramids with sleeve vertical center line symmetry.
By adopting the technical scheme, the self-locking type steel bar connection grouting sleeve connection principle mainly comprises internal grouting material expansion internal stress and the occlusion acting force of a self-locking device for fixing steel bars to be connected, namely, during the hoisting construction of on-site transverse prefabricated parts, two adjacent prefabricated parts in a post-pouring section are connected by extending the transverse stressed steel bars, the connection length of the steel bars to be connected is subjected to surface treatment, so that part of the connection length is occluded with the self-locking device after the steel bar sleeves are inserted, the steel bars to be connected penetrating through the self-locking device are connected by subsequent grouting, the double functions of self-locking occlusion and grouting expansion internal stress of the steel bar sleeve grouting connection are realized, the inverted triangular cone rough surface design is matched, the integrity of the steel bars to be connected and the steel bar sleeves after grouting is enhanced, the tensile action and the reverse supporting action of the steel bars to be connected after grouting are met, the steel bar connection strength is improved, and the great connection strength is achieved.
Preferably, the self-locking device includes an anchor cylinder, an end hole, an arch ring, a plurality of first grout holes and a plurality of second grout holes, the anchor cylinder is fixed inside the steel bar sleeve, the end of the anchor cylinder is held, the arch ring includes two integrally formed retaining ring portions and an arch-shaped protruding portion, the arch-shaped protruding portion is located between the two retaining ring portions, the plurality of first grout holes are respectively formed in the anchor cylinder, and the plurality of second grout holes are respectively formed in the arch-shaped protruding portion.
Through adopting above-mentioned technical scheme, when the grout material was injected, the first class thick liquid hole in the accessible anchor section of thick bamboo flowed into to the anchor section of thick bamboo and treats between the connecting reinforcement, flowed into to the arch-shaped ring and treat between the connecting reinforcement through the second class thick liquid hole, treat after the grout material sclerosis, can have very big tensile effect.
Preferably, a plurality of first inclined stopping parts are fixed on the outer part of the anchor cylinder.
Through adopting above-mentioned technical scheme, first slope backstop portion can improve the combination effect between anchor section of thick bamboo and the grout material.
Preferably, a plurality of second inclination stoppers are fixed inside the anchor cylinder, and the inclination of the second inclination stoppers is opposite to that of the first inclination stoppers.
Through adopting above-mentioned technical scheme, second slope backstop portion can improve the combination effect between anchor section of thick bamboo and the grout material, through adopting the reverse design with first slope backstop portion, can further through tensile resistance to compression effect.
Preferably, the included angle between the first and second tilt stops is 80-100 °.
By adopting the technical scheme, the first inclination stop part and the second inclination stop part in the inclination angle range have excellent comprehensive effect.
Preferably, the length of the steel bar to be connected inserted into the steel bar sleeve is L, the net length in the steel bar sleeve is a, and the amount of the reserved end in the steel bar sleeve is B, then L = (a-B)/2.
By adopting the technical scheme, the length of the surface treatment of the steel bar to be connected can be confirmed by reserving the end head allowance.
Preferably, the end head amount B is 10-14mm.
By adopting the technical scheme, the head can meet most construction requirements in advance.
Preferably, the steel bar sleeve is a cylinder, an oval cylinder or a polygonal cylinder.
By adopting the technical scheme, the steel bar sleeve made of the cylinder, the oval cylinder or the polygonal cylinder can meet the construction requirement under the procedure of abundant calculation.
Preferably, the hole closing plug is an expansion rubber plug.
Through adopting above-mentioned technical scheme, when the obturator stopper is the inflation rubber buffer, the leakproofness is good.
The invention also provides a construction method of the self-locking steel bar connection grouting sleeve, which comprises the following steps:
s1, preparing a steel bar sleeve, respectively inserting two steel bars to be connected into the steel bar sleeve from two ends of the steel bar sleeve, and positioning an insertion distance and an end distance of the two steel bars to be connected by using a distance gauge;
s2, inserting the hole closing plug, injecting grouting material from a grouting hole at the bottom of the steel bar sleeve, inserting a vibration rod from the grouting hole, ensuring that the grouting material is fully filled to any position inside the steel bar sleeve, and discharging redundant grouting material from a grout overflow hole at the top of the steel bar sleeve;
and S3, maintaining the grouting material inside the steel bar sleeve.
In summary, the invention mainly has the following beneficial effects: .
The self-locking type steel bar connection grouting sleeve connection principle mainly comprises internal grouting material expansion internal stress and the engagement acting force of a self-locking device for fixing steel bars to be connected, namely, during hoisting construction of on-site transverse prefabricated parts, two adjacent prefabricated parts in a post-pouring section extend outwards to be connected with transverse stressed steel bars, surface treatment is carried out on the connection length of the steel bars to be connected, so that part of the connection length is engaged with the self-locking device after the steel bars are inserted into the steel bar sleeve, the steel bars to be connected penetrating through the self-locking device are connected by means of subsequent grouting, the double effects of self-locking engagement and grouting expansion internal stress of the steel bar sleeve grouting connection are achieved, the inverted triangular cone rough surface design is matched, the integrity of the steel bars to be connected and the steel bar sleeve after grouting is enhanced, the tensile effect and the reverse supporting effect of the steel bars to be connected after grouting are met, the steel bar connection strength is improved, and the connection strength is extremely high.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 1. a steel bar sleeve; 2. reinforcing steel bars to be connected; 4. a self-locking device; 5. grouting holes; 6. a slurry overflow hole; 7. closing the hole plug; 8. inverting the rough surface of the triangular pyramid; 41. an anchor cylinder; 42. an end hole; 43. an arcuate ring; 44. a first orifice; 45. a second flow hole; 431. a holding ring portion; 432. an arched convex portion; 411. a first tilt stop; 412. a second tilt stop.
Detailed Description
Example (b):
the present invention is described in further detail below with reference to FIGS. 1-2.
Example 1
Refer to fig. 1 and fig. 2, a from locking-type steel bar connection grout sleeve, a butt joint for reinforcing bar is fixed in the building engineering, in order to reach the purpose of fully connected reinforcing bar, this from locking-type steel bar connection grout sleeve has set up including being used for connecting two steel bar sleeve 1 of treating connected reinforcing bar 2, two treat that connected reinforcing bar 2 inserts from steel bar sleeve 1's both ends respectively, be provided with in steel bar sleeve 1 and block treat self-lock device 4 that connected reinforcing bar 2 moved back, wherein grouting holes 5 have been seted up to steel bar sleeve 1's bottom, grout hole 6 has been seted up at steel bar sleeve 1's top, it has grout material to fill in steel bar sleeve 1, both ends all are equipped with closed hole stopper 7 about steel bar sleeve 1 and two are treated connected reinforcing bar 2 handing-over department, inner wall surface at steel bar sleeve 1 is equipped with the thick face 8 of inverted triangle awl with sleeve vertical center line symmetry.
Referring to fig. 1 and 2, the self-locking steel bar connection grouting sleeve connection principle mainly includes internal grouting material expansion internal stress and the engagement action force of the self-locking device 4 for fixing the steel bars 2 to be connected, namely, during hoisting construction of on-site horizontal prefabricated components, the two adjacent prefabricated components in the post-casting section extend outward and are connected with each other by the horizontal stressed steel bars, the connection length of the steel bars 2 to be connected is subjected to surface treatment, so that a part of the connection length after the steel bar sleeves 1 are inserted is engaged with the self-locking device 4, the steel bars 2 to be connected penetrating through the self-locking device 4 are connected by subsequent grouting, the double functions of the self-locking engagement and the grouting expansion internal stress of the grouting connection of the steel bar sleeves 1 are realized, and the integrity of the steel bars 2 to be connected and the steel bar sleeves 1 after grouting is enhanced by matching with the design of the inverted triangular cone rough surface 8, and the tensile action and the reverse supporting action of the steel bars 2 to be connected after grouting are satisfied, so that the steel bar connection strength is improved, and the connection strength is extremely high.
Referring to fig. 1 and 2, in order to make the self-locking device 4 more reliable than the conventional structure, the self-locking device 4 is improved, wherein the self-locking device 4 comprises an anchor cylinder 41, an end hole 42, an arch ring 43, a plurality of first grout holes 44 and a plurality of second grout holes 45, the anchor cylinder 41 is fixed inside the steel bar sleeve 1, the end of the anchor cylinder 41, the arch ring 43 comprises two integrally formed retaining ring portions 431 and an arch boss portion 432, the arch boss portion 432 is located between the two retaining ring portions 431, the plurality of first grout holes 44 are respectively opened on the anchor cylinder 41, the plurality of second grout holes 45 are respectively opened on the arch boss portion 432, when grout is injected, the grout can flow into the space between the anchor cylinder 41 and the steel bar 2 to be connected through the first grout holes 44 in the anchor cylinder 41, and flow into the space between the arch ring 43 and the steel bar 2 to be connected through the second grout holes 45, and after the grout is hardened, the self-locking device can have a great tensile effect.
Referring to fig. 1 and 2, in order to further improve the reliability of self-locking device 4, a plurality of first inclined stoppers 411 are fixed outside anchor cylinder 41, and first inclined stoppers 411 can improve the combination effect between anchor cylinder 41 and grouting material; meanwhile, a plurality of second inclined stopping portions 412 are fixed inside the anchor cylinder 41, the inclination of the second inclined stopping portions 412 is opposite to that of the first inclined stopping portions 411, the second inclined stopping portions 412 can improve the combination effect between the anchor cylinder 41 and grouting material, and the tensile and compressive effects can be further achieved by adopting the design opposite to that of the first inclined stopping portions 411.
Referring to fig. 1 and 2, the angle between the first and second tilt stops 411 and 412 is 80-100 °, and the first and second tilt stops 411 and 412 in this tilt angle range have excellent combined effect, and when the sizes of the first and second tilt stops 411 and 412 are the same, experimental simulation shows that the tensile and compressive effects are the best when the angle between the first and second tilt stops 411 and 412 is 90 °.
Referring to fig. 1 and 2, if the length of the steel bar 2 to be connected inserted into the steel bar sleeve 1 is L, the clear length in the steel bar sleeve 1 is a, and the amount of the reserved end in the steel bar sleeve 1 is B, L = (a-B)/2, and the length of the steel bar 2 to be connected subjected to surface treatment can be determined by reserving the amount of the end; the head amount B is 10-14mm, which meets most construction requirements, and the connection effect is best when the head amount B is 12 mm.
Referring to fig. 1 and 2, in order to improve the adaptability, the steel bar sleeve 1 may be selected as a cylinder, an oval cylinder or a polygonal cylinder, and the steel bar sleeve 1 made of the cylinder, the oval cylinder or the polygonal cylinder can meet the construction requirements under a procedure with abundant calculation; in order to prevent leakage during grouting, the hole closing plug 7 can be selected as an expansion rubber plug, the water-swelling property of the hole closing plug can meet the requirements well, and the sealing performance is good when the hole closing plug 7 is the expansion rubber plug.
Example 2
The embodiment also provides a construction method of the self-locking type steel bar connecting grouting sleeve, which comprises the following steps:
s1, preparing a steel bar sleeve 1, respectively inserting two steel bars 2 to be connected into the steel bar sleeve 1 from two ends of the steel bar sleeve 1, positioning an insertion distance and an end distance of the two steel bars 2 to be connected by using a distance ruler, and performing roughness treatment on the surface of the steel bars 2 to be connected before insertion, so that the steel bars 2 to be connected can be deepened, and friction is increased;
s2, inserting a hole closing plug 7, injecting grouting material from a grouting hole 5 at the bottom of the steel bar sleeve 1, inserting a vibration rod from the grouting hole 5 to ensure that the grouting material is fully filled to any position in the steel bar sleeve 1, and discharging redundant grouting material from a grout overflow hole 6 at the top of the steel bar sleeve 1;
and S3, maintaining the grouting material inside the steel bar sleeve 1.
By adopting the series of processes, the construction can be quickly realized, and the process is simple and quick.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The self-locking type steel bar connection grouting sleeve is characterized by comprising a steel bar sleeve (1) used for connecting two steel bars (2) to be connected, wherein the two steel bars (2) to be connected are respectively inserted from two ends of the steel bar sleeve (1), a self-locking device (4) used for blocking the steel bars (2) to be connected from moving back is arranged in the steel bar sleeve (1), a grouting hole (5) is formed in the bottom of the steel bar sleeve (1), a grout overflow hole (6) is formed in the top of the steel bar sleeve (1), grouting materials are filled in the steel bar sleeve (1), closed hole plugs (7) are arranged at the left end and the right end of the joint of the steel bar sleeve (1) and the two steel bars (2) to be connected, and inverted triangular cone rough surfaces (8) are symmetrically arranged on the surface of the inner wall of the steel bar sleeve (1) by using a vertical central line of the sleeve;
the self-locking device (4) comprises an anchor cylinder (41), an end hole (42), an arch-shaped ring (43), a plurality of first grout holes (44) and a plurality of second grout holes (45), the anchor cylinder (41) is fixed inside the steel bar sleeve (1), the end of the anchor cylinder (41) is connected, the arch-shaped ring (43) comprises two integrally formed retaining ring portions (431) and an arch-shaped bulge portion (432), the arch-shaped bulge portion (432) is located between the two retaining ring portions (431), the plurality of first grout holes (44) are respectively formed in the anchor cylinder (41), and the plurality of second grout holes (45) are respectively formed in the arch-shaped bulge portion (432);
a plurality of first inclined stopping parts (411) are fixed outside the anchor cylinder (41);
a plurality of second inclination stopping parts (412) are fixed inside the anchor cylinder (41), and the inclination of the second inclination stopping parts (412) is opposite to that of the first inclination stopping parts (411).
2. The self-locking steel bar connection grouting sleeve as claimed in claim 1, wherein: the angle between the first (411) and second (412) tilt stops is 80-100 °.
3. The self-locking steel bar connection grouting sleeve of claim 1, characterized in that: the length of the steel bar (2) to be connected inserted into the steel bar sleeve (1) is L, the net length in the steel bar sleeve (1) is A, the amount of the reserved end in the steel bar sleeve (1) is B, and L = (A-B)/2.
4. The self-locking steel bar connection grouting sleeve of claim 3, wherein: the end head pre-measurement B is 10-14mm.
5. The self-locking steel bar connection grouting sleeve as claimed in claim 1, wherein: the steel bar sleeve (1) is a cylinder, an oval cylinder or a polygonal cylinder.
6. The self-locking steel bar connection grouting sleeve as claimed in claim 1, wherein: the hole closing plug (7) is an expansion rubber plug.
7. The construction method of the self-locking steel bar connection grouting sleeve according to claim 1, characterized in that: the method comprises the following steps:
s1, preparing a steel bar sleeve (1), respectively inserting two steel bars (2) to be connected into the steel bar sleeve (1) from two ends of the steel bar sleeve, and positioning an insertion distance and an end distance of the two steel bars (2) to be connected by using a distance ruler;
s2, inserting the hole closing plug (7), injecting grouting material from a grouting hole (5) in the bottom of the steel bar sleeve (1), inserting a vibration rod from the grouting hole (5), ensuring that the grouting material is fully filled to any position in the steel bar sleeve (1), and discharging redundant grouting material from a grout overflow hole (6) in the top of the steel bar sleeve (1);
and S3, curing the grouting material inside the steel bar sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120788.4A CN114319727B (en) | 2022-02-08 | 2022-02-08 | Self-locking type steel bar connection grouting sleeve and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210120788.4A CN114319727B (en) | 2022-02-08 | 2022-02-08 | Self-locking type steel bar connection grouting sleeve and construction method thereof |
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| CN114319727A CN114319727A (en) | 2022-04-12 |
| CN114319727B true CN114319727B (en) | 2023-01-24 |
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| CN115198971A (en) * | 2022-07-07 | 2022-10-18 | 上海宇辉住宅工业有限公司 | Pre-grouting type full-grouting sleeve structure and construction method |
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| CN108035493A (en) * | 2018-01-31 | 2018-05-15 | 合肥建工集团有限公司 | A kind of antidetonation assembles half grout sleeve of self-locking |
| CN108301568B (en) * | 2018-01-31 | 2019-07-26 | 合肥建工集团有限公司 | A kind of assembling structure of assembly concrete component |
| CN208763307U (en) * | 2018-05-17 | 2019-04-19 | 中国建筑股份有限公司 | A kind of grout outlet reinforcing bar grout sleeve obliquely and its connection structure |
| CN110453607A (en) * | 2019-08-22 | 2019-11-15 | 苏交科集团股份有限公司 | A kind of precast pier reinforcing bar connection type and its construction method |
| CN214402451U (en) * | 2021-01-19 | 2021-10-15 | 孙明征 | Building pouring beam and column steel bar end connection component |
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