CN215484097U

CN215484097U - Full grouting sleeve device and system with unbonded sections of connecting steel bars

Info

Publication number: CN215484097U
Application number: CN202121535569.XU
Authority: CN
Inventors: 陈留剑; 高立强; 王敏; 王康宁; 马冰; 郑纲; 胡洁亮
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-01-11
Anticipated expiration: 2031-07-07

Abstract

The application relates to a set up full grout sleeve device and system of connecting reinforcement unbonded section relates to structural engineering construction technical field. This full grout sleeve device includes sleeve and two protection pipes, the sleeve intussuseption is filled with grout material, two the protection pipe is located respectively telescopic both ends, each the corresponding end of protection pipe all at least partially stretches into the sleeve, and each all be equipped with the protection piece on the outer wall of protection pipe, all paste on the inner wall and be equipped with the flexible layer that cuts off the wall layer of one deck, the interior mixture of flexible layer that cuts off is equipped with the reinforcement, the reinforcement is used for assisting flexible layer restriction connecting reinforcement is in position in the protection pipe. The application provides a grout sleeve device entirely, has solved better among the correlation technique connecting reinforcement from the sleeve to the concrete and has leaded to connecting reinforcement to split in advance owing to there being the rigidity sudden change, and connecting reinforcement takes place the displacement easily in the sleeve and influences the problem of connection stability.

Description

Full grouting sleeve device and system with unbonded sections of connecting steel bars

Technical Field

The application relates to the technical field of structural engineering construction, in particular to a full grouting sleeve device and system with a non-bonding section of connecting reinforcing steel bars.

Background

At present, the technology of sleeve grouting connection in the actual construction of connection of a precast concrete pier and a bearing platform is mature, and the sleeve grouting connection is widely applied to connection of the precast concrete pier and the bearing platform due to the fact that the connection mode is fast and convenient and the bearing capacity is reliable.

In a pseudo-static test, the formation of a plastic hinge at the bottom of a pier is influenced due to the existence of the sleeve, a strain concentration phenomenon can be generated due to the sudden change of the rigidity from the sleeve to concrete of the longitudinal steel bar, the steel bar is often broken in advance under the action of repeated lateral loads, so that the ductility of the sleeve grouting connection pier is lower than that of a cast-in-place pier, and particularly in a middle and high-intensity seismic area, the sleeve grouting connection mode obviously cannot meet the requirement on the seismic performance of the pier. In addition, the reinforcing bar easily takes place the displacement in the sleeve for the reinforcing bar is not located telescopic intermediate position, influences the structural stability who connects between prefabricated pier and the cushion cap to a certain extent.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a set up connecting reinforcement does not have full grout sleeve device and system of bonding section to connecting reinforcement from the sleeve to the concrete leads to connecting reinforcement can split in advance owing to there being the rigidity sudden change in solving related art, and connecting reinforcement takes place the displacement easily in the sleeve and influences the problem of connection stability.

In a first aspect, a fully grouted sleeve device for connecting non-adhesive sections of reinforcing steel bars is provided, which comprises:

the sleeve is filled with grouting material;

two protection tubes, two the protection tube is located respectively telescopic both ends, each the corresponding end of protection tube all at least partially stretches into the sleeve, and each all be equipped with the protection piece on the outer wall of protection tube, all paste on the inner wall and be equipped with the flexible partition layer of one deck, the mixed reinforcement that is equipped with in the flexible partition layer, the reinforcement is used for assisting flexible partition layer restriction connecting reinforcement is in position in the protection tube.

In some embodiments, the flexible barrier layer is a foam.

In some embodiments, the reinforcement is a synthetic fiber.

In some embodiments, the reinforcement is rubber particles or plastic granules.

In some embodiments, end cover sealing rings are respectively arranged at two ends of the sleeve, and a through hole for the connection steel bar to pass through is formed in the middle of each end cover sealing ring.

In some embodiments, the protecting member is wrapped around the outer wall of the protecting pipe, and the protecting member is a steel wire mesh.

In some embodiments, the length of the protection tube ranges from 10 cm to 15cm, and the thickness of the flexible partition layer ranges from 5 mm to 10 mm.

In some embodiments, the outer wall of the sleeve is vertically provided with at least one grouting pipe and at least one grout outlet pipe at intervals, and pipe blocking plugs are arranged at the ends of the grouting pipes and the ends of the grout outlet pipes far away from the sleeve.

In some embodiments, the inner wall of the sleeve is provided with a plurality of key teeth at intervals along its length.

In a second aspect, the present application further provides a fully grouted sleeve system comprising:

the grouting material is filled in the sleeve, and connecting steel bars are inserted into two ends of the sleeve respectively;

two protection tubes, two the protection tube overlaps respectively and locates to correspond on the splice bar, and each the corresponding end of protection tube all at least partially stretches into the sleeve, each all be equipped with the protection piece on the outer wall of protection tube, and with correspond it has one deck elasticity partition layer to fill between the splice bar, the internal mixture of flexible partition is equipped with the reinforcement, the reinforcement is used for assisting flexible partition layer restriction the splice bar is in position in the protection tube.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a set up connecting reinforcement does not have full grout sleeve device of bonding section, and it sets up the protection piece through setting up on the outer wall of the protection tube that is located telescopic both ends to paste at the inner wall of protection tube and establish the flexible partition layer of one deck, and the interior mixedly of flexible partition layer is equipped with the reinforcement. Wherein, the setting of protection piece can play the effect of protection tube, because the protection tube also is in the changeover portion from sleeve to concrete, the rigidity sudden change that consequently exists and the removal that prefabricated pier probably exists can make the protection tube break, and the protection tube of having established then fine protection of protection piece, even under the circumstances that the protection tube has broken, owing to there is the protection of outer protection piece, the protection tube can be better keep perfect shape, thereby guarantee the good of flexible partition layer, guarantee the existence of unbonded section, protect the splice bar as far as. In addition, mix the reinforcement in flexible partition layer can increase its intensity when guaranteeing flexible partition layer elastic property to a certain extent, but still not rigid connection, can assist flexible partition layer restriction connecting reinforcement in the position of protective tube when making it possess the performance of unbonded section, do not take place the skew.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a vertical sectional view of a fully grouted casing device provided with unbonded sections of connecting steel bars according to an embodiment of the present disclosure;

fig. 2 is a schematic overall structural diagram of a full grouting sleeve device provided with unbonded sections of connecting steel bars according to an embodiment of the present application;

fig. 3 is a schematic overall structure diagram of a fully grouted sleeve system according to an embodiment of the present application;

fig. 4 is a schematic view of an internal structure of a fully grouted sleeve system according to an embodiment of the present disclosure.

In the figure: 1-sleeve, 10-grouting material, 11-grouting pipe, 12-pipe plugging plug, 13-grout outlet pipe, 2-protection pipe, 3-protection piece, 4-flexible partition layer, 5-reinforcement piece, 6-end cover sealing ring, 7-connecting steel bar, 8-bearing platform and 9-prefabricated bridge pier.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a set up connecting reinforcement does not have full grout sleeve device of bonding section, and it can solve among the relevant art connecting reinforcement from the sleeve to the concrete because there is the rigidity sudden change to lead to connecting reinforcement can split in advance, and connecting reinforcement takes place the displacement easily in the sleeve and influences the problem of connection stability.

Referring to fig. 1-2, this full grout sleeve device includes sleeve 1 and two protection tubes 2, wherein, the intussuseption of sleeve 1 intussuseption is filled with grout material 10, sleeve 1's both ends are located respectively to two protection tubes 2, sleeve 1 is all stretched into to the corresponding end of each protection tube 2 part at least, and all be equipped with protection piece 3 on each protection tube 2's the outer wall, all paste on the inner wall and be equipped with one deck flexible partition layer 4, the mixture is equipped with reinforcement 5 in the flexible partition layer 4, reinforcement 5 is used for assisting the position of flexible partition layer 4 restriction connecting reinforcement 7 in protection tube 2.

Specifically, the position that flexible partition layer 4 located is for the unbonded section, and the grout material 10 that sets up in the layer 4 of flexible partition can be fine the outside concrete of preventing and sleeve 1 invades the unbonded section, guarantees the existence of unbonded section, protects connecting reinforcement 7, and in addition, flexible partition layer 4 can also be to a certain extent to connecting reinforcement 7 carry on spacingly in sleeve 1. Since the protection pipe 2 is also located at the transition section from the sleeve 1 to the concrete, the sudden change of rigidity and the possible movement of the prefabricated bridge pier 9 can cause the protection pipe 2 to break, once the protection pipe 2 breaks, the flexible partition layer 4 inside the protection pipe can be damaged, so that the unbonded section does not exist correspondingly, and the protection effect on the section corresponding to the connecting steel bar 7 is not achieved. Then, a protection element 3 is provided, which is arranged on the outer wall of the protection tube 2, so that even if the protection tube 2 is already broken, the protection tube 2 can better keep a good shape due to the protection of the outer protection element 3, thereby ensuring the integrity of the flexible partition layer 4, ensuring the existence of the unbonded section and protecting the connecting steel bars 7 as much as possible. Besides, be equipped with reinforcement 5 in the mixture in flexible partition layer 4 of the inner wall of protective tube 2, reinforcement 5 can increase its intensity when guaranteeing flexible partition layer 4 elastic property to a certain extent, here reinforcement 5 is preferred synthetic fiber, rubber particle or plastic granules, consequently flexible partition layer 4 that has increased reinforcement 5 is still not rigid connection, the existence of unbonded section has been guaranteed, simultaneously because it can assist flexible partition layer 4 to restrict the position of connecting reinforcement 7 in protective tube 2 in the increase of reinforcement 5, the skew does not take place.

Furthermore, the flexible partition layer 4 is preferably made of foam rubber, and in the actual construction process, the flexible partition layer 4 is formed by arranging the protection pipe 2, inserting the connecting steel bars 7 into the protection pipe 2, filling the foam rubber between the protection pipe 2 and the connecting steel bars 7, and mixing the foam rubber with the connecting steel bars 7 to form the reinforcing member 5. If not set up the unbonded section, coupling bar 7 is because rigidity sudden change at sleeve 1 transition position to the concrete, can lead to coupling bar 7 to produce the phenomenon of meeting an emergency and concentrating at sleeve 1 tip, low cycle fatigue can make coupling bar 7 fracture in advance, lead to its bearing capacity and ductility to reduce, and the setting up of flexible partition layer 4 makes the transition position rigidity change that transitions to the concrete at sleeve 1 become gentle, avoid coupling bar 7 to produce at sleeve 1 tip and meet an emergency and concentrate, effectually prevent that coupling bar 7 from taking place to fracture in advance.

Further, because the diameter of protection tube 2 is less than sleeve 1's diameter, and sleeve 1 intussuseption is filled with grout material 10, spills over from the clearance between protection tube 2 and the sleeve 1 in order to prevent grout material 10, then is equipped with end cover seal 6 respectively at sleeve 1's both ends, and end cover seal 6's middle part is equipped with the through-hole that is used for supplying connecting reinforcement 7 to wear to establish.

Further, because protection tube 2 itself is long cylindric, for better protection tube 2, consequently with protection piece 3 cladding in the outer wall of protection tube 2, protection piece 3 is the preferred wire net here, and the wire net itself has better deformability, consequently it can not break, and its cladding is in protection tube 2 that the outer wall of protection tube 2 can be fine in addition, even if protection tube 2 takes place to break, also can be fine assurance its integrality.

Further, the length value range of the protection tube 2 is 10-15 cm, and the thickness value range of the flexible partition layer 4 is 5-10 mm.

Furthermore, in order to facilitate grouting in the sleeve 1, at least one grouting pipe 11 and at least one grout outlet pipe 13 are vertically arranged on the outer wall of the sleeve 1 at intervals, and a pipe blocking plug 12 is arranged at one end of each grouting pipe 11 and one end of each grout outlet pipe 13, which are far away from the sleeve 1.

Further, the inner wall of the sleeve 1 is provided with a plurality of key teeth along the length interval thereof to enhance the effect of the sleeve grouting connection steel bar 7.

The application still provides a set up full grout sleeve system of 7 unbonded sections of connecting reinforcement, it specifically includes sleeve 1 and two protection pipes 2, wherein, its intussuseption of sleeve 1 is filled with grout material 10, sleeve 1's both ends are inserted respectively and are equipped with connecting reinforcement 7, two protection pipes 2 overlap respectively and locate on the connecting reinforcement 7 that corresponds, and the equal at least part of the end that corresponds of each protection pipe 2 stretches into sleeve 1, all be equipped with protection piece 3 on the outer wall of each protection pipe 2, and with the connecting reinforcement 7 that corresponds between the packing have the flexible layer of cut off 4, the mixture is equipped with reinforcement 5 in the flexible layer of cut off 4, reinforcement 5 is used for supplementary flexible layer of cut off 4 restriction connecting reinforcement 7 in the position of protection pipe 2.

Further, as shown in fig. 3-4, the construction of the full grouting sleeve system mainly includes three parts, namely, pouring construction of the bearing platform 8, construction of the prefabricated pier 9, and splicing construction of the prefabricated pier 9 and the bearing platform 8. Firstly, pouring construction of a bearing platform 8 is carried out, in the construction process, a protection pipe 2 is arranged at the end part of the lower end of a sleeve 1 to reserve an unbonded section of a connecting steel bar 7 to realize installation and positioning, and foam rubber is filled in the protection pipe 2 to prevent concrete from invading the unbonded section when the concrete of the bearing platform 8 is poured; then, constructing a prefabricated pier 9, in the construction process, similarly, arranging an unbonded section protection pipe 2 at the upper end part of the sleeve 1, installing the positioning sleeve 1, and filling foam rubber into the protection pipe 2 to prevent concrete from invading into an unbonded section when pouring pier body concrete; and finally, splicing construction of the prefabricated pier 9 and the bearing platform 8 is carried out, and connection of the prefabricated pier 9 and the bearing platform 8 is realized.

This full grout sleeve system is through setting up protection piece 3 on the outer wall of the protection tube 2 that is located the both ends of sleeve 1 to paste at the inner wall of protection tube 2 and establish the flexible partition layer of one deck 4, and the flexible partition layer 4 in the mixture be equipped with reinforcement 5, can play fine protection tube 2 and the effect of unbonded section, protect connecting reinforcement 7 as far as. In addition, mix reinforcement 5 in flexible partition layer 4 and can increase its intensity when guaranteeing flexible partition layer 4 elastic property to a certain extent, can assist flexible partition layer 4 to restrict the position of connecting reinforcement 7 in protective tube 2 when making it possess the performance of unbonded section, do not take place the skew.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a set up connecting reinforcement does not have full grout sleeve device of bonding section which characterized in that, it includes:

the sleeve (1) is filled with grouting material (10);

two protection tubes (2), two protection tube (2) are located respectively the both ends of sleeve (1), each the corresponding end of protection tube (2) all at least partially stretches into sleeve (1), and each all be equipped with protection piece (3) on the outer wall of protection tube (2), all paste on the inner wall and be equipped with the flexible layer of cutting off (4), the flexible layer of cutting off mixes in (4) and is equipped with reinforcement (5), reinforcement (5) are used for supplementarily cut off layer (4) restriction connecting reinforcement (7) and be in position in protection tube (2).

2. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the flexible partition layer (4) is made of foam rubber.

3. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the reinforcing member (5) is a synthetic fiber.

4. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the reinforcing piece (5) is made of rubber particles or plastic particles.

5. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the two ends of the sleeve (1) are respectively provided with an end cover sealing ring (6), and the middle part of the end cover sealing ring (6) is provided with a through hole for the connection reinforcing steel bar (7) to penetrate.

6. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the protection piece (3) is coated on the outer wall of the protection tube (2), and the protection piece (3) is a steel wire mesh.

7. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the length value range of the protection tube (2) is 10-15 cm, and the thickness value range of the flexible partition layer (4) is 5-10 mm.

8. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the outer wall of sleeve (1) is perpendicular the interval and is equipped with at least one slip casting pipe (11) and goes out thick liquid pipe (13), slip casting pipe (11) and play thick liquid pipe (13) are kept away from one of sleeve (1) is served and all is equipped with stifled stopcock (12).

9. The fully grouted casing device of claim 1, wherein the connecting reinforcement bar non-adhesive section is arranged in a manner that: the inner wall of the sleeve (1) is provided with a plurality of key teeth at intervals along the length thereof.

10. The utility model provides a set up connecting reinforcement does not have full grout sleeve system of bonding section which characterized in that, it includes:

the grouting material filling device comprises a sleeve (1), wherein grouting material (10) is filled in the sleeve (1), and connecting steel bars (7) are inserted into two ends of the sleeve (1) respectively;

two protection tubes (2), two protection tube (2) overlap respectively and are located the correspondence on connecting reinforcement (7), and each the corresponding end of protection tube (2) all at least partially stretches into sleeve (1), each all be equipped with protection piece (3) on the outer wall of protection tube (2), and with correspond it has one deck flexible partition layer (4) to fill between connecting reinforcement (7), the flexible partition layer (4) is interior to mix and is equipped with reinforcement (5), reinforcement (5) are used for supplementarily flexible partition layer (4) restriction connecting reinforcement (7) are in position in protection tube (2).