CN111441536A - Tenon-and-mortise assembly type semi-hollow grouting sleeve and connecting method thereof - Google Patents
Tenon-and-mortise assembly type semi-hollow grouting sleeve and connecting method thereof Download PDFInfo
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- CN111441536A CN111441536A CN202010217002.1A CN202010217002A CN111441536A CN 111441536 A CN111441536 A CN 111441536A CN 202010217002 A CN202010217002 A CN 202010217002A CN 111441536 A CN111441536 A CN 111441536A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011440 grout Substances 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 67
- 239000010959 steel Substances 0.000 claims description 67
- 239000004567 concrete Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 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
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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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Abstract
The invention discloses a tenon-and-mortise assembled semi-hollow grouting sleeve and a connecting method thereof, wherein the tenon-and-mortise assembled semi-hollow grouting sleeve comprises a hollow tenon connecting pipe, a hollow mortise connecting pipe and a fixing bolt; the hollow tenon connecting pipe comprises a first semi-hollow pipe body, a tenon and a grout outlet connecting part; the tenon comprises a large U-shaped tenon and a small U-shaped tenon which are coaxially arranged in parallel; the hollow mortise head connecting pipe comprises a semi-hollow pipe body II, a mortise head and a grouting connecting part; the mortise head comprises a large U-shaped groove and a small U-shaped groove which are coaxially arranged in parallel, the large U-shaped groove and the large U-shaped tenon realize mortise and tenon matching, and the small U-shaped groove and the small U-shaped tenon realize mortise and tenon matching; and a plurality of semi-hollow grooves are formed in the outer wall surfaces of the semi-hollow pipe body I and the semi-hollow pipe body II. The small U-shaped groove and the small U-shaped tenon are in threaded connection by adopting the fixing bolt while mortise and tenon connection is formed, so that the small U-shaped groove and the small U-shaped tenon are reliable in connection, simple in construction, easy for industrial production and the like, and have good application prospect and application value.
Description
Technical Field
The invention relates to a grouting sleeve, in particular to a tenon-and-mortise assembled semi-hollow grouting sleeve and a connecting method thereof.
Background
In recent years, the government of China promotes the reform of industrial structures, and clearly provides a target for vigorously developing the assembly type building. The fabricated building has the advantages of short building period, high construction efficiency, enterprise cost reduction, energy conservation, environmental protection and the like, and has wide development prospect. In the fabricated building, the quality of the connection of the members is an important factor affecting the safety of the building. Particularly, most of vertical steel bars in concrete members are connected by grouting sleeves, after the ribbed steel bars are inserted into the sleeves, special grouting materials are adopted to fill gaps between the sleeves and the steel bars, and the steel bars in the sleeves are anchored by bonding generated by hardening of the grouting materials, so that the connection mode of effective force transmission between the steel bars and the sleeves is realized, and the construction operation of the connection mode comprises cabin sealing, preparation and inspection of the grouting materials and grouting. This conventional method has the following problems:
1) the grouting material quality is difficult to guarantee. Because conditions such as manpower, hardware, formula and the like of a construction site are difficult to reach the level of a laboratory, the performances such as fluidity, compactness, compressive strength, expansion capacity and the like of the grouting material prepared on the site cannot be guaranteed by 100 percent, and the quality of sleeve connection is further influenced.
2) The construction quality of grouting is difficult to control. When grouting operation is carried out, the sleeve is completely embedded in the concrete member, and whether grouting materials in the sleeve are full of gaps in the sleeve, whether the grouting materials are uniformly distributed, whether bubbles and hollows exist and the like are not easy to control, so that whether steel bar connection in the sleeve is effective and reliable is difficult to guarantee.
3) Grouting effect and bonding quality are not easy to detect. Because the whole grouting process of traditional grout muffjoint spare is gone on in confined pre-buried sleeve completely, the grout condition inside the sleeve that constructor is difficult to detect after the grout finishes, can't directly judge whether grout muffjoint quality is qualified.
4) The sleeve has poor adhesion to external concrete. The outer surface of the traditional sleeve is smooth, which affects the bonding performance between the sleeve and the external concrete, and the phenomenon of bonding-slipping is easy to generate in the stress process.
5) There are also many other uncontrollable factors for grout anchor connection. The reliability of the traditional grouting sleeve connection is also difficult to ensure the reliability of the connection due to the conditions that the steel bar joint is staggered, the steel bar is contacted with the sleeve wall or is too close to the sleeve wall, impurities exist in the sleeve and the like.
In order to solve the above problems, some researchers have invented some new grouting sleeves:
for promoting the bonding property between grout material and reinforcing bar, the sleeve, the disclosed full grout sleeve of patent CN207812840U has promoted the inside roughness of sleeve through set up spacing piece of reinforcing bar, reinforcing bar guider and annular piece strutting arrangement on the inner wall.
In order to solve the problem of possible dislocation of the ends of the reinforcing steel bars, the patent CN109184084A discloses a split grouting sleeve, wherein a cylindrical cavity is arranged between a left section of sleeve and a right section of sleeve, and an annular limiting device is arranged in the cavity. The two spherical joints are clamped between the inner holes of the two annular limiting pieces, and the left half section grouting sleeve and the right half section grouting sleeve are respectively fastened and positioned through the two groups of fastening bolts. The steel bar ends can still be connected under the condition of certain dislocation. However, the above two sleeves are additionally provided with the component between the inner wall of the sleeve and the steel bar, so that the narrow space between the sleeve and the steel bar is further reduced, the flowability of the grouting material is influenced, and meanwhile, the spherical joint provided by the patent CN109184084A is complex, so that the manufacturing cost of the sleeve is increased.
In addition, patent CN205742753U discloses a combined grouting sleeve, which is divided into an upper part, a middle part and a lower part with internal threads or external threads, and the sleeve is connected by rotating the middle sleeve, and the friction resistance between the inner wall of the sleeve and the grouting material is increased by the threads and protrusions on the inner wall of the middle friction component. However, the above-mentioned combined sleeve connection technology has very high requirements for the manufacturing and construction technology of the middle sleeve, which mainly reflects that the middle sleeve needs to be connected with the upper and lower sleeves through threaded connection, and the accurate connection difficulty is very high and the requirement for manufacturing the sleeve is very high under the condition that the upper and lower sleeves and the prefabricated part thereof are not convenient to move; more importantly, for the vertical reinforced concrete member needing to be connected with a plurality of or a plurality of rows of reinforcing steel bars simultaneously, the vertical displacement is basically consistent by adopting threaded connection, the construction difficulty is very high, and the implementation of the patent is influenced.
Therefore, it is necessary to provide a sleeve connection member which is easy to handle, highly safe, and ensures reliable connection, particularly in the case of sleeve connection.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a tenon-and-mortise assembled semi-hollow grouting sleeve and a connecting method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a half fretwork grout sleeve of tenon fourth of twelve earthly branches assembled, includes hollow tenon connecting pipe, hollow mortise connecting pipe and fixing bolt.
The hollow tenon connecting pipe and the hollow mortise connecting pipe are provided with a through cavity which is axially communicated, and the through cavity can be used for inserting the steel bars to be connected and injecting grouting materials.
The hollow tenon connecting pipe comprises a first semi-hollow pipe body, tenons and a grout outlet connecting part, wherein the tenons and the grout outlet connecting part are positioned at two ends of the first semi-hollow pipe body.
The slurry outlet connecting part is provided with a slurry outlet hole. The tenon comprises a large U-shaped tenon and a small U-shaped tenon which are coaxially arranged in parallel, wherein the small U-shaped tenon is positioned between the large U-shaped tenon and the semi-hollow pipe body I.
The hollow mortise head connecting pipe comprises a semi-hollow pipe body II, and mortise heads and grouting connecting parts which are positioned at two ends of the semi-hollow pipe body II.
The slip casting connecting part is provided with a slip casting hole. The mortise head comprises a large U-shaped groove and a small U-shaped groove which are coaxially arranged in parallel, wherein the large U-shaped groove is positioned between the small U-shaped groove and the semi-hollow pipe body II. Meanwhile, mortise and tenon matching is realized by the large U-shaped groove and the large U-shaped tenon, and mortise and tenon matching is realized by the small U-shaped groove and the small U-shaped tenon.
And a plurality of semi-hollow grooves are formed in the outer wall surfaces of the semi-hollow pipe body I and the semi-hollow pipe body II.
The fixing bolt is used for realizing threaded connection when the small U-shaped groove and the small U-shaped tenon form mortise and tenon connection.
The large U-shaped tenon comprises a large outer arc surface, a large inclined shoulder, a large vertical side wall surface and a large inner arc surface from top to bottom in sequence. The small U-shaped tenon comprises a small outer arc surface, a small inclined shoulder, a small vertical side wall surface and a small inner arc surface from top to bottom in sequence. The large outer arc surface and the small outer arc surface are flush with the outer wall surface of the semi-hollow pipe body I, and the arc length of the large outer arc surface is larger than that of the small outer arc surface. A large round cavity is arranged in the large U-shaped tenon. A small circular cavity is arranged in the small U-shaped tenon. The large circular cavity and the small circular cavity are coaxially arranged with the through cavity of the semi-hollow pipe body I, and the diameter of the through cavity is larger than the diameter D5 of the large circular cavity and larger than or equal to the diameter of the small circular cavity.
Big vertical lateral wall face is tangent with big intrados, and little vertical lateral wall face is tangent with little intrados, and the big intrados diameter of supposing is D3, and little intrados diameter is D4, and little U type groove width is D1, and big U type groove width is D2, then D1 equals D4, D2 equals D3, and D3 > D5 > D4.
The small vertical side wall surface in the small U-shaped tenon is provided with an internal thread hole, the corresponding position of the small U-shaped groove is provided with an external thread hole, and the external wall surface of the small U-shaped groove corresponding to the external thread hole is provided with a thread cushion table. After the fixing bolt penetrates through the thread cushion table, the external thread hole and the internal thread hole, the threaded connection of the small U-shaped groove and the small U-shaped tenon is realized.
Convex-concave stripes are arranged on the first half-hollow pipe body and the protruding part between two adjacent half-hollow grooves on the two outer wall surfaces of the first half-hollow pipe body and the half-hollow pipe body.
Four grouting holes are distributed in the grouting connecting portion along the circumferential direction, and four grout outlet holes are uniformly distributed in the grout outlet connecting portion along the circumferential direction. And each grouting hole and each grout outlet can be sealed and plugged by adopting a metal plug.
A connection method of a tenon-and-mortise assembled semi-hollow grouting sleeve comprises the following steps.
Step 1, inserting a steel bar to be connected into a sleeve, comprising the following steps:
Step 2, pre-burying the sleeve, comprising the following steps:
Step 3, connecting the sleeve: and hoisting the first concrete block to enable the tenon of the first concrete inner hollow core tenon connecting pipe and the mortise of the second concrete inner hollow core tenon connecting pipe to be mutually occluded, and after the mortise and tenon connection is completed, using a fixing bolt to realize the threaded secondary connection of the small U-shaped groove in the mortise and the small U-shaped tenon in the tenon.
Step 4, grouting: and removing the metal plugs in one of the grouting holes and the grouting hole exposed outside, grouting from the grouting holes until the grout flows out of the grout outlet, and sealing the grouting holes and the grout outlet.
Step 5, gap filling: and filling and sealing the interface gap at the joint of the tenon and the mortise by using mortar, and maintaining after the surface concrete is leveled.
In step 21, the outer wall surface of the hollow tenon connecting pipe is in contact with the first concrete block through the semi-hollow groove and the convex-concave stripe. In step 22, the outer wall surface of the hollow mortise head connecting pipe is in contact with the second concrete block through the semi-hollow groove and the convex-concave stripe.
In step 3, the occlusal force F between the tenon and the mortisetComprises the following steps:
wherein D is the sleeve external diameter, D1 is the width of small U-shaped groove, D2 is the width of U-shaped groove, ftThe tensile strength of the sleeve material.
Step 3, the bolt force F provided by a single anchor boltsAnd shear bearing capacity of a single anchor stud
The following formula is satisfied:
T＝fyAs
Wherein mu is the extrusion friction coefficient of the bolt and is generally less than 1.0;
the shear bearing capacity is resisted by the positive extrusion force of a single fixing bolt; n isvD is the diameter of the fixing bolt,
the shear strength of the fixing bolt; t is the pulling force applied to the steel bar to be connected; f. ofyThe yield strength of the steel bar to be connected; a. thesIs the cross-sectional area of the steel bar to be connected.
The invention has the following beneficial effects:
1. the arrangement of the semi-hollow-out groove in the sleeve can reduce the consumption of steel and the production cost on one hand; on the other hand, the roughness of the surface of the sleeve is improved, so that the bonding performance between the sleeve and concrete is improved.
2. According to the invention, the mortise and tenon connection is realized through the tenon and the mortise firstly between the hollow tenon connecting pipe and the hollow connecting pipe, and then the mortise and tenon are subjected to secondary thread fixing through the fixing bolt, so that the rotation of the sleeve to all directions can be effectively limited, the reliability and firmness of steel bar connection are greatly improved, and the defect that the grouting quality of the traditional grouting sleeve is difficult to control and detect is avoided.
3. At present, the traditional sleeve connection force is mainly the grout anchor effect of grouting material, and in the invention, the sleeve connection force consists of the grouting material bonding force, the friction force between the sleeve and concrete, the pin bolt force provided by a fixing bolt and the mechanical snap-in force of a mortise-tenon joint. Obviously, the invention provides more connecting modes among the sleeves, can effectively improve the connection performance of the steel bars, and reduces the connection problem to the greatest extent by a mixed connection mode under the condition of not influencing the grouting quality, so that the structure is safer and more reliable.
4. The tenon-and-mortise connection and the bolt connection are constructed and connected under the exposed condition, so that the construction quality control and the connection reliability detection are facilitated; and grouting connection is carried out after external connection is finished, and compared with the traditional grouting sleeve technology, the multiple connection measures are more reliable.
5. The tight engagement between the tenon and the mortise can avoid the extra slurry leakage phenomenon, reduce the cost loss caused by slurry waste, and has simple construction operation and certain economic benefit.
Drawings
Fig. 1 shows a schematic structural diagram of a tenon-and-mortise assembled semi-hollow grouting sleeve disclosed by the invention.
Fig. 2 is an enlarged schematic view showing the details of the hollow mortise head connecting tube according to the present invention.
FIG. 3 shows a longitudinal section of a mortise head according to the invention.
Fig. 4 is a detailed enlarged view of the tenon in the hollow tenon joint pipe of the present invention.
Fig. 5 shows a longitudinal section of a tenon according to the invention.
FIG. 6 is a view showing the connection state between the hollow mortise joint connecting pipe and the hollow tenon connecting pipe according to the present invention.
FIG. 7 is a longitudinal sectional view showing the connection of the hollow tenon and mortise joint pipes according to the present invention.
FIG. 8 shows the installation diagram of the hollow tenon connecting pipe and the hollow mortise connecting pipe before construction.
FIG. 9 is a drawing showing the construction process of the hollow tenon connecting pipe and the hollow mortise connecting pipe according to the present invention.
Fig. 10 shows a schematic state diagram of the tenon-and-mortise assembled semi-hollow grouting sleeve after construction is completed.
Among them are:
10. a hollow tenon connecting pipe;
11. a first semi-hollow pipe body; 111. semi-hollow grooves;
12. a tenon;
121. a large U-shaped tenon; 1211. a large outer arc surface; 1212. a large inclined shoulder strap; 1213. a large vertical sidewall surface; 1214. a large inner arc surface; 1215. a large circular cavity;
122. a small U-shaped tenon; 1221. a small outer arc surface; 1222. small inclined shoulder straps; 1223. a small vertical sidewall surface; 1224. a small intrados surface; 1225. a small circular cavity; 1226. an internally threaded bore;
13. a slurry outlet connecting part; 131. a slurry outlet;
20. a hollow mortise head connecting pipe;
21. a second semi-hollow pipe body;
22. riveting heads; 221. a large U-shaped groove; 222. a small U-shaped groove; 2221. an external threaded hole; 2222. a thread pad table;
23. grouting the connecting part; 231. grouting holes;
30. fixing the bolt; 40. reinforcing steel bars to be connected; 50. and (5) grouting material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in fig. 1, 6 and 7, the half-hollow grouting sleeve of the tenon-and-mortise assembly type comprises a hollow tenon connecting pipe 10, a hollow mortise connecting pipe 20 and a fixing bolt 30.
The hollow tenon connecting pipe and the hollow mortise connecting pipe are provided with through cavities which are axially through, and the through cavities can be used for inserting the steel bars to be connected 40 and injecting grouting materials 50.
The hollow tenon connecting pipe comprises a semi-hollow pipe body I11, a tenon 12 and a pulp outlet connecting part 13, wherein the tenon 12 and the pulp outlet connecting part are positioned at two ends of the semi-hollow pipe body I.
The outer wall surface of the first semi-hollow pipe body is provided with a plurality of semi-hollow grooves 111, steel consumption is reduced, production cost is reduced, and meanwhile, the bonding performance between the sleeve and concrete can be improved.
Furthermore, convex-concave stripes are arranged on the convex parts between two adjacent half-hollow grooves on the outer wall surface of the half-hollow pipe body, so that the bonding performance between the sleeve and concrete is further improved.
The grout outlet connecting part is preferably provided with four grout outlet holes 131, and the four grout outlet holes are preferably uniformly distributed along the circumferential direction of the grout outlet connecting part.
As shown in fig. 4 and 5, the tenon comprises a large U-shaped tenon 121 and a small U-shaped tenon 122 which are coaxially arranged in parallel, wherein the small U-shaped tenon is located between the large U-shaped tenon and the first semi-hollow pipe body.
The large U-shaped tenon comprises a large outer arc surface 1211, a large inclined shoulder 1212, a large vertical side wall surface 1213 and a large inner arc surface 1214 from top to bottom in sequence. The big U-shaped tenon is also provided with a big circular cavity 1215, and the big circular cavity 1215 is a part penetrating through the cavity.
The small U-shaped tenon comprises a small outer arc surface 1221, a small inclined shoulder 1222, a small vertical side wall surface 1223 and a small inner arc surface 1224 from top to bottom in sequence. The small U-shaped tenon is also provided with a small circular cavity 1225, and a large circular cavity 1215 is also part of the through cavity.
The large outer arc surface and the small outer arc surface are flush with the outer wall surface of the semi-hollow pipe body I, and the arc length of the large outer arc surface is larger than that of the small outer arc surface.
The large circular cavity and the small circular cavity are coaxially arranged with the through cavity of the semi-hollow pipe body I, and the diameter of the through cavity is larger than the diameter D5 of the large circular cavity and larger than or equal to the diameter of the small circular cavity of the steel bar to be connected.
The large vertical side wall surface is tangent to the large inner arc surface, the small vertical side wall surface is tangent to the small inner arc surface, the diameter of the large inner arc surface is D3, the diameter of the small inner arc surface is D4, the width of the small U-shaped groove is D1, the width of the large U-shaped groove is D2, D1 is D4, D2 is D3, and D3 is greater than D5 and greater than D4.
The small vertical side wall surface in the small U-shaped tenon is provided with an internal threaded hole 1226.
The hollow mortise head connecting pipe comprises a semi-hollow pipe body II 21, and a mortise head 22 and a grouting connecting part 23 which are positioned at two ends of the semi-hollow pipe body II.
The grouting connection portion is preferably uniformly provided with four grouting holes 231 in a circumferential direction. Each grouting hole and each grout outlet can be sealed and plugged by preferably adopting a metal plug.
As shown in fig. 2 and 3, the mortise head comprises a large U-shaped groove 221 and a small U-shaped groove 222 which are coaxially arranged in parallel, wherein the large U-shaped groove is located between the small U-shaped groove and the semi-hollow pipe body II. Meanwhile, mortise and tenon matching is realized by the large U-shaped groove and the large U-shaped tenon, and mortise and tenon matching is realized by the small U-shaped groove and the small U-shaped tenon.
An external threaded hole 2221 is formed in the corresponding position of the small U-shaped groove, and a threaded cushion table 2222 is arranged on the outer wall surface of the small U-shaped groove corresponding to the position of the external threaded hole.
After the fixing bolt penetrates through the thread cushion table, the external thread hole and the internal thread hole, the threaded connection of the small U-shaped groove and the small U-shaped tenon is realized.
Further, a plurality of semi-hollow grooves are formed in the outer wall surface of the semi-hollow pipe body II, and convex-concave stripes are preferably arranged on the convex parts between every two adjacent semi-hollow grooves.
A connection method of a tenon-and-mortise assembled semi-hollow grouting sleeve comprises the following steps.
Step 1, inserting the steel bar to be connected into the sleeve, comprising the following steps.
Step 2, pre-burying the sleeve, comprising the following steps:
Step 3, connecting the sleeve: and hoisting the first concrete block to enable the tenon of the first concrete inner hollow core tenon connecting pipe and the mortise of the second concrete inner hollow core tenon connecting pipe to be mutually occluded, and after the mortise and tenon connection is completed, using a fixing bolt to realize the threaded secondary connection of the small U-shaped groove in the mortise and the small U-shaped tenon in the tenon.
In step 3, the occlusal force F between the tenon and the mortisetComprises the following steps:
Ft>T
T＝fyAs
wherein D is the sleeve external diameter, D1 is the width of small U-shaped groove, D2 is the width of U-shaped groove, ftThe tensile strength of the sleeve material. T is the pulling force applied to the steel bar to be connected; f. ofyThe yield strength of the steel bar to be connected; a. thesIs the cross-sectional area of the steel bar to be connected.
Further, the pin force F provided by the single anchor boltsAnd shear bearing capacity of a single anchor stud
The following formula is satisfied:
Wherein mu is the extrusion friction coefficient of the bolt and is generally less than 1.0;
the shear bearing capacity is resisted by the positive extrusion force of a single fixing bolt; n isvThe number of the sheared surfaces of the fixed bolt is 2 in the invention; d is the diameter of the fixing bolt,
the shear strength of the fixing bolt; t is the pulling force applied to the steel bar to be connected.
The sleeve force was analyzed as follows:
the sleeve connecting force provided by the grouting sleeve mainly comprises an occlusion force F generated by occlusion between tenon and mortisetBolt force F provided by the boltsAnd the adhesive force F between the grouting material and the pipe wall and the steel barbAnd the frictional resistance F between the sleeve and the concreteμI.e. F1＝Fs+Ft+Fb+Fμ。
The sleeve connection force provided by the traditional sleeve is mainly the bonding force F generated by the grouting material, the pipe wall and the steel barbI.e. F2＝Fb
Obviously, F1＞F2Therefore, the invention can provide more connecting force, and the structure is safer and more reliable.
Step 4, grouting: and removing the metal plugs in one of the grouting holes and the grouting hole exposed outside, grouting from the grouting holes until the grout flows out of the grout outlet, and sealing the grouting holes and the grout outlet.
Step 5, gap filling: and filling and sealing the interface gap at the joint of the tenon and the mortise by using mortar, and maintaining after the surface concrete is leveled.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. The utility model provides a half fretwork grout sleeve of tenon fourth of twelve earthly branches assembled which characterized in that: the hollow tenon connecting pipe is connected with the hollow mortise head;
the hollow tenon connecting pipe and the hollow mortise connecting pipe are both provided with a through cavity which is axially through, and the through cavity can be used for inserting the steel bar to be connected and injecting grouting material;
the hollow tenon connecting pipe comprises a semi-hollow pipe body I, and a tenon and a pulp outlet connecting part which are positioned at two ends of the semi-hollow pipe body I;
the slurry outlet connecting part is provided with a slurry outlet hole; the tenon comprises a large U-shaped tenon and a small U-shaped tenon which are coaxially arranged in parallel, wherein the small U-shaped tenon is positioned between the large U-shaped tenon and the first semi-hollow pipe body;
the hollow mortise head connecting pipe comprises a semi-hollow pipe body II, and a mortise head and a grouting connecting part which are positioned at two ends of the semi-hollow pipe body II;
the grouting connecting part is provided with a grouting hole; the mortise head comprises a large U-shaped groove and a small U-shaped groove which are coaxially arranged in parallel, wherein the large U-shaped groove is positioned between the small U-shaped groove and the semi-hollow pipe body II; meanwhile, the mortise and tenon matching is realized by the large U-shaped groove and the large U-shaped tenon, and the mortise and tenon matching is realized by the small U-shaped groove and the small U-shaped tenon;
a plurality of semi-hollow grooves are formed in the outer wall surfaces of the first semi-hollow pipe body and the second semi-hollow pipe body;
the fixing bolt is used for realizing threaded connection when the small U-shaped groove and the small U-shaped tenon form mortise and tenon connection.
2. The tenon-and-mortise assembled semi-hollowed grouting sleeve of claim 1, which is characterized in that: the large U-shaped tenon comprises a large outer arc surface, a large inclined shoulder, a large vertical side wall surface and a large inner arc surface from top to bottom in sequence; the small U-shaped tenon comprises a small outer arc surface, a small inclined shoulder, a small vertical side wall surface and a small inner arc surface from top to bottom in sequence; the large outer arc surface and the small outer arc surface are flush with the outer wall surface of the semi-hollow pipe body I, and the arc length of the large outer arc surface is larger than that of the small outer arc surface; a large round cavity is arranged in the large U-shaped tenon; a small circular cavity is arranged in the small U-shaped tenon; the large circular cavity and the small circular cavity are coaxially arranged with the through cavity of the semi-hollow pipe body I, and the diameter of the through cavity is larger than the diameter D5 of the large circular cavity and larger than or equal to the diameter of the small circular cavity.
3. The tenon-and-mortise assembled semi-hollowed grouting sleeve of claim 2, wherein: big vertical lateral wall face is tangent with big intrados, and little vertical lateral wall face is tangent with little intrados, and the big intrados diameter of supposing is D3, and little intrados diameter is D4, and little U type groove width is D1, and big U type groove width is D2, then D1 equals D4, D2 equals D3, and D3 > D5 > D4.
4. The tenon-and-mortise assembled semi-hollowed grouting sleeve of claim 2, wherein: the small vertical side wall surface in the small U-shaped tenon is provided with an internal thread hole, the corresponding position of the small U-shaped groove is provided with an external thread hole, and the external wall surface of the small U-shaped groove corresponding to the position of the external thread hole is provided with a thread cushion table; after the fixing bolt penetrates through the thread cushion table, the external thread hole and the internal thread hole, the threaded connection of the small U-shaped groove and the small U-shaped tenon is realized.
5. The tenon-and-mortise assembled semi-hollowed grouting sleeve of claim 1, which is characterized in that: convex-concave stripes are arranged on the first half-hollow pipe body and the protruding part between two adjacent half-hollow grooves on the two outer wall surfaces of the first half-hollow pipe body and the half-hollow pipe body.
6. The tenon-and-mortise assembled semi-hollowed grouting sleeve of claim 1, which is characterized in that: four grouting holes are distributed in the grouting connecting part along the circumferential direction, and four grout outlet holes are uniformly distributed in the grout outlet connecting part along the circumferential direction; and each grouting hole and each grout outlet can be sealed and plugged by adopting a metal plug.
7. A tenon-and-mortise assembled type connecting method for a semi-hollow grouting sleeve is characterized in that: the method comprises the following steps:
step 1, inserting a steel bar to be connected into a sleeve, comprising the following steps:
step 11, inserting a first steel bar to be connected into the hollow tenon connecting pipe: sleeving a hollow tenon connecting pipe on the end part of each to-be-connected steel bar in the mixed steel bar I, wherein the specific sleeving method comprises the following steps: extending the end part of the first steel bar to be connected into a through cavity in the hollow tenon connecting pipe from the side of the grout outlet connecting part; the insertion depth is required to be more than 10 times of the diameter of the steel bar to be connected, and each grout outlet hole of the grout outlet connecting part is plugged by a metal plug;
step 12, inserting a second connecting steel bar into the hollow mortise head connecting pipe: sleeving a hollow mortise head connecting pipe on the end part of each to-be-connected steel bar II in the mixed block II, wherein the specific sleeving method comprises the following steps: extending the end part of the second steel bar to be connected into a through cavity in the hollow mortise head connecting pipe from the side of the grouting connecting part; the insertion depth is required to be more than 10 times of the diameter of the steel bar to be connected, and each grouting hole of the grouting connecting part is plugged by a metal plug;
step 2, pre-burying the sleeve, comprising the following steps:
step 21, embedding a hollow tenon connecting pipe: the method comprises the following steps that hollow tenon connecting pipes sleeved on the peripheries of connecting steel bars are embedded in the edge of a concrete block I except for tenons, and at least one grout outlet hole in each hollow tenon connecting pipe is exposed;
step 22, embedding a hollow mortise head connecting pipe: the hollow mortise head connecting pipes sleeved on the peripheries of the connecting steel bars II are pre-embedded at the edge parts of the concrete blocks II except the mortise heads, and at least one grouting hole in each hollow mortise head connecting pipe is exposed;
step 3, connecting the sleeve: hoisting the first concrete block to enable the tenon of the first concrete inner hollow core tenon connecting pipe and the mortise of the second concrete inner hollow core tenon connecting pipe to be mutually occluded, and after the mortise and tenon connection is completed, using a fixing bolt to realize threaded secondary connection of a small U-shaped groove in the mortise and a small U-shaped tenon in the tenon;
step 4, grouting: removing the metal plugs in one of the exposed grouting holes and the exposed grouting hole, grouting from the grouting hole until grout flows out of the grout outlet hole, and sealing the grouting hole and the grout discharge hole;
step 5, gap filling: and filling and sealing the interface gap at the joint of the tenon and the mortise by using mortar, and maintaining after the surface concrete is leveled.
8. The connection method of the tenon-and-mortise assembled semi-hollowed grouting sleeve according to claim 7, characterized in that: in the step 21, the outer wall surface of the hollow tenon connecting pipe is in contact with the first concrete block through the semi-hollow groove and the convex-concave stripe; in step 22, the outer wall surface of the hollow mortise head connecting pipe is in contact with the second concrete block through the semi-hollow groove and the convex-concave stripe.
9. The connection method of the tenon-and-mortise assembled semi-hollowed grouting sleeve according to claim 8, wherein the connection method comprises the following steps: in step 3, the occlusal force F between the tenon and the mortisetComprises the following steps:
wherein D is the sleeve external diameter, D1 is the width of small U-shaped groove, D2 is the width of U-shaped groove, ftThe tensile strength of the sleeve material.
10. The connection method of the tenon-and-mortise assembled semi-hollowed grouting sleeve according to claim 8, wherein the connection method comprises the following steps: step 3, the bolt force F provided by a single anchor boltsAnd shear bearing capacity of a single anchor stud
The following formula is satisfied:
T＝fyAs
Wherein mu is the extrusion friction coefficient of the bolt and is generally less than 1.0;
the shear bearing capacity is resisted by the positive extrusion force of a single fixing bolt; n isvD is the diameter of the fixing bolt,
the shear strength of the fixing bolt; t is the pulling force applied to the steel bar to be connected; f. ofyThe yield strength of the steel bar to be connected; a. thesIs the cross-sectional area of the steel bar to be connected.
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| CN202010217002.1A CN111441536B (en) | 2020-03-25 | 2020-03-25 | Mortise and tenon assembled semi-hollowed grouting sleeve and connecting method thereof |
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| CN111441536B (en) * | 2020-03-25 | 2024-06-25 | 河海大学 | Mortise and tenon assembled semi-hollowed grouting sleeve and connecting method thereof |
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| CN111441536B (en) | 2024-06-25 |
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