CN213041491U - Center-sized vertical steel bar sleeve grouting connection structure - Google Patents
Center-sized vertical steel bar sleeve grouting connection structure Download PDFInfo
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- CN213041491U CN213041491U CN202022192063.5U CN202022192063U CN213041491U CN 213041491 U CN213041491 U CN 213041491U CN 202022192063 U CN202022192063 U CN 202022192063U CN 213041491 U CN213041491 U CN 213041491U
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Abstract
The utility model provides a vertical steel bar sleeve connection structure that grouts placed in middle type is connected a storage thick liquid grout outlet at the telescopic grout outlet end of grout, store thick liquid grout outlet and connect in vertical arrangement's the telescopic top of grout, the telescopic lower extreme of grout is for the slip casting end inserts for supplying the lower part reinforcing bar, and the upper end inserts for going out the thick liquid end in order to supply upper portion reinforcing bar, the top of storing thick liquid grout outlet has the reinforcing bar patchhole, can supply this upper portion reinforcing bar to seal to pass through, the bottom of storing thick liquid grout outlet has the muffjoint end, can supply with the upper end sealing connection of the telescopic grout outlet end of grout, the upper portion of storing thick liquid grout outlet has out the thick liquid mouth, grout sleeve grout outlet end or store thick liquid ware grout outlet is equipped with reinforcing bar centering frame in, the upper portion reinforcing bar by the centre bore of reinforcing bar centering frame passes and is radial spacing. The utility model discloses can conveniently look over the grout material plumpness of storing thick liquid play thick liquid ware inner chamber to obtain the plumpness information of grout material in the grout sleeve.
Description
Technical Field
The utility model relates to a steel sleeve grout connection structure that vertical precast concrete component used still relates to corresponding sleeve grout connection method.
Background
In the prefabricated concrete structure building, the main reinforcement of the prefabricated part is usually connected by sleeve grouting. When the sleeve grouting connection method is applied to a vertical member, a grouting sleeve is generally embedded at the lower end part of the vertical member, such as a prefabricated column and a prefabricated wall, and is mainly arranged at the bottom of the prefabricated member.
The grouting sleeve has been used in engineering for decades since the invention in 1968. The sleeve grouting connection method is applied in China since 2009, and the sleeve structure type and the grouting construction process which are mature abroad are also adopted, but as the number of special grouting teams is small, most grouting operations are common field construction workers, and quality supervision departments are often questioned on the plumpness of grouting sleeves and the strength of grouting materials in the sleeves in grouting construction. But grout muffjoint is concrete member internal node, belongs to the concealed engineering, to the sleeve grout joint that probably has the quality problem, does not have very reasonable reliable detection and restoration method at present, mainly shows in three aspects:
one, sleeve inner chamber grout plumpness is difficult to detect, and current grout sleeve all is that the sleeve lateral wall establishes into out the thick liquid hole, pours into grout material into from business turn over thick liquid hole and is full of the sleeve in space everywhere, because grout sleeve is the metal barrel, the inside grout material plumpness condition of sleeve can not be detected to ultrasonic wave, elastic wave etc.. The detection of the X-ray method can clearly display the internal condition of the sleeve, but the detection cost is high, the detection is also limited by the thickness of a concrete member, and a satisfactory image is difficult to obtain by a portable ray instrument used in an engineering field for a wall or a prefabricated column with the thickness of more than 300 mm. The sensor method and the steel wire drawing method are both used for indirectly judging whether the grouting material at the grout outlet of the sleeve is full, and the fullness of the grouting material in the sleeve is difficult to detect;
secondly, the physical strength of the grouting material in the sleeve is difficult to detect, in engineering, standard curing grouting material compressive strength test blocks are manufactured under the same field condition to serve as the basis for judging the strength of the grouting material in the sleeve, but if the field grouting material compressive strength test blocks are not cured properly and the detection result is unqualified, the problem is very complicated to process, and if the real grouting material strength detection result cannot be obtained to serve as acceptance data, serious quality hidden troubles can be buried in the engineering;
thirdly, for the joints for confirming that the grouting material in the grouting sleeve is unqualified in plumpness, no matter the grouting material is supplemented into the sleeve from the sleeve grout outlet hole, or the member concrete covered on the surface of the sleeve is removed, and then the grouting material is supplemented after the hole is drilled on the sleeve, the repairing methods are very labor-consuming and laborious, the grout supplementing quality cannot be visually confirmed, the damage to the connecting joint of the member by the method for drilling the damaged prefabricated member and the sleeve body is large, the repairing amount is also large, so that the repairing difficulty of the joint which is not fully grouted is large, the production efficiency is low, and many engineering projects are reluctant to detect and find grouting defects, even conceal the problems.
In conclusion, if the plumpness or the strength of grouting materials in the sleeve grouting joint does not meet the design requirements, problems cannot be found or defects cannot be repaired, potential hazards are brought to the safety of the building structure, so that the quality of the prefabricated building is suspected to be lower than that of the traditional cast-in-place building, people also begin to research the prefabricated concrete structure without grouting sleeves, the overseas mature high-efficiency connection method is avoided, and whether a new structure has new potential safety hazards or not is proved by a large number of engineering applications. At present, if the problems faced by sleeve grouting connection are not solved, the popularization and the healthy development of the fabricated building in China are affected, and even technical backing may occur. Therefore, the difficult problems of detecting the grouting sleeve fullness and the strength of the grouting material in the sleeve are solved, and the development of a new sleeve grouting fullness repairing method is an urgent requirement of the current assembly type concrete building.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a vertical steel bar sleeve connection structure that is in the middle of type that is in the middle of is in milk solves the above-mentioned technical problem that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a vertical steel bar sleeve connection structure in middle of type that fills in milk, connects between the precast concrete member that is located upper portion and the vertical steel bar of the lower part structure body that is located the lower part, its characterized in that:
the precast concrete member has upper reinforcing bars protruding downward, and the lower structural body has lower reinforcing bars protruding upward;
the upper steel bar and the lower steel bar are opposite in position and externally sleeved with a grouting sleeve, the part of the grouting sleeve corresponding to the upper steel bar is a grout outlet end, and the part corresponding to the lower steel bar is a grouting end;
the grout outlet end of the grout sleeve is connected with a grout storage and outlet device, the top of the grout storage and outlet device is provided with a steel bar insertion hole for the upper steel bar to pass through in a sealing manner, the bottom of the grout storage and outlet device is provided with a sleeve connecting end for the upper end of the grout outlet end of the grout sleeve to be connected in a sealing manner, and the upper part of the grout storage and outlet device is provided with a grout outlet nozzle;
the grout outlet end of the grouting sleeve or the grout outlet device of the grout storage device is internally provided with a steel bar centering frame, the steel bar at the upper part passes through a center hole of the steel bar centering frame and is limited in the radial direction, the steel bar centering frame is provided with a plurality of grout passing holes, and the radial edge of the steel bar centering frame is supported on the surface of an inner cavity of the grouting sleeve or the surface of an inner cavity of the grout storage device.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the slurry storage and discharge device is of a single-piece integral structure or a multi-piece combined structure, and the reinforcing steel bar insertion hole is coaxially arranged with the grouting sleeve.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the minimum distance between the inner cavity wall of the upper reinforcing steel bar section coated by the slurry storage slurry discharging device and the outer surface of the upper reinforcing steel bar is not less than 8mm, and the length of the inner cavity part which has a distance of 8mm or more with the upper reinforcing steel bar is 15 mm-45 mm.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the outer side of the upper reinforcing steel bar of the slurry storage and discharge device is also provided with a slurry storage column which is not coated with the upper reinforcing steel bar, and a slurry discharge nozzle of the slurry storage and discharge device is arranged at the upper part of the slurry storage column.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the slurry outlet nozzle of the slurry storage and outlet device has an elevation angle larger than 0 degree.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: and a slurry outlet nozzle of the slurry storage and outlet device is communicated with a slurry outlet pipe, and the slurry outlet pipe extends outwards to the outer surface of the precast concrete member.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: and a space is arranged between the precast concrete member and the lower structural body, the grouting end of the grouting sleeve is communicated with the space, and the grouting end or the space is communicated with a grouting pipe.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the lateral wall of the grouting end of the grouting sleeve is totally closed, the bottom surface of the grouting end is close to or flush with the end surface of the bottom of the precast concrete member, and the periphery of the gap is closed and communicated with the grouting pipe.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the grouting sleeve is a cylindrical full-grouting sleeve with an inner cavity surface provided with a concave-convex structure.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: and the side wall of the grout outlet end of the grouting sleeve is totally closed.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the slurry storage and discharge device is made of non-metal materials.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the reinforcing steel bar centering frame and the slurry storage and discharge device are of an integrated structure.
Vertical steel bar sleeve grout connection structure of type placed in middle, wherein: the periphery of the interval is sealed or filled and sealed, the side face of the grouting end of the grouting sleeve is provided with a side wall grouting hole, the side wall grouting hole is connected with a grouting nozzle and a grouting pipe or directly connected with a grouting pipe, and the grouting pipe extends outwards to the outer surface of the precast concrete member.
The utility model has the beneficial technical effects that:
1. the utility model discloses set up the thick liquid ware that stores thick liquid in grout sleeve upper end, when making each grout sleeve grout, grout sleeve upper portion has all relied on the thick liquid ware that stores of storing to store the grout material of certain volume, if the grout material in the grout sleeve takes place from the condition that the slip casting end leaked, the grout material in the thick liquid ware that stores of grout sleeve upper end can descend along with the decline of the grout material face in the grout sleeve promptly, replenish the grout sleeve inner chamber, effectively guarantee the plumpness of the grout material in the grout sleeve;
2. the utility model discloses set up the thick liquid ware of storing thick liquid in grout sleeve upper end, will move the detection to the grout plumpness outside grout sleeve from grout sleeve is interior, the grout plumpness in the thick liquid ware of storing thick liquid can reflect the plumpness of grout in grout sleeve directly perceived, has simplified the detection degree of difficulty of grout plumpness in grout sleeve greatly; if grouting materials are reserved in the slurry storage and discharge device, the inner cavity of the grouting sleeve is full, and when no grouting materials are reserved in the slurry storage and discharge device, the inner cavity of the grouting sleeve is indicated to be unsaturated at a high probability, and the grouting operation is required to be performed if the grouting materials are not full; because the slurry storage and discharge device is made of non-metal materials, the nondestructive detection or the local damage drilling detection of the inner cavity of the slurry storage and discharge device is more convenient and quicker to implement than the grouting fullness detection of the existing grouting sleeve, the detection cost is greatly reduced, and the detection accuracy is improved;
3. the slurry storage and discharge device provides a simple slurry supplementing scheme, no matter the grouting material in the grouting sleeve is not full or the grouting material in the slurry storage and discharge device is not full, holes can be drilled from the outer side surface of the precast concrete component to the upper part of the slurry storage and discharge device, and slurry is supplemented from the drilled positions, so that the damage of a connecting piece caused by drilling holes in the side wall of the sleeve for supplementing the grouting sleeve is avoided, the drilling difficulty of the slurry storage and discharge device position is easier than that of the grouting sleeve, and the grouting technology, operation difficulty and cost of the grouting sleeve are greatly reduced;
4. the upper reinforcing steel bar section coated by the slurry storage and discharge device is provided with an inner cavity with the minimum distance of 8mm between the inner cavity wall and the outer surface of the upper reinforcing steel bar and the length of 15 mm-45 mm, and forms a grouting material ring with the upper reinforcing steel bar, a grouting material small pellet sample can be obtained from the position of the slurry storage and discharge device by adopting a core drilling method, the compressive strength of the grouting material small pellet sample of the grouting sleeve slurry storage and discharge device connected with the same batch of grouting material is compared with the compressive strength of the small pellet sample obtained on the same batch of grouting material standard curing compressive strength test pieces by the same core drilling method, and the relation between the entity grouting material in the batch of grouting sleeve nodes and the known compressive strength of the grouting material can be obtained and used for judging whether the compressive strength of the entity of the grouting material in the sleeve is qualified. The grouting material in the grout outlet device is completely the same as the grouting material in the sleeve, and the sampling from the grout outlet device under the same environmental curing condition completely solves the international problem that the entity of the grouting material in the grouting sleeve cannot be sampled;
5. the steel bar centering frame is arranged in the grout outlet end of the grouting sleeve or the grout outlet device of the grout storage device, and more than two points of rigid supports for the upper steel bar inserted into the grouting sleeve are formed by the steel bar centering frame and the steel bar inserting hole of the grout storage device, so that the total length of the upper steel bar in the grout outlet end of the grouting sleeve is basically coaxial with the grouting sleeve, and the problem that the connection performance of a joint is reduced due to the fact that the axis of the upper steel bar in the grout outlet end of the grouting sleeve is deflected, which cannot be avoided by supporting the upper steel bar by the elastic rubber plug of the port of the existing grouting sleeve in a single.
6. Adopt the utility model discloses a grout muffjoint component can carry out the detection of various methods as required, can carry out necessary benefit thick liquid to not full joint and restore, checks calculation or the remedial measure that needs to the joint that grout material intensity is not enough, makes telescopic connection quality of grout and problem processing no longer have blind area and blank point.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a centered vertical steel bar sleeve grouting connection structure provided by the present invention;
fig. 2 is a schematic structural view of a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Description of reference numerals: 1-prefabricating a concrete member; 2-slurry storage and discharge device; 3-grouting a sleeve; 4-upper reinforcing steel bars; 5-grouting material; 6-lower reinforcing steel bars; 7-end surface of the bottom of the precast concrete member; 8-sealing slurry; 9-a lower structure; 10-sealing the plug; 11-grouting pipe; 12-grouting end; 13-slurry outlet end; 14-a steel bar centering frame; 15-sleeve connection end; 16-a pulp outlet; 17-a slurry outlet pipe; 18-sealing plugs of the slurry outlet pipes; 19-inserting the reinforcing steel bar into the hole; 20-grouting nozzle; 21-grouting pipe; 22-sidewall grouting holes; 23-a base slurry; 24-a sealing cover; 25-coating the upper steel bar section; 26-slurry storage column.
Detailed Description
As shown in fig. 1, the utility model provides a vertical steel sleeve grout connection structure of type placed in middle is applied to the precast concrete component 1 that is located the upper portion and is located the vertical steel bar connection between the lower part structure 9 of lower part, wherein:
a space is arranged between a precast concrete member 1 and a lower structural body 9, the precast concrete member 1 is provided with an upper reinforcing steel bar 4 protruding downwards, and the lower structural body 9 is provided with a lower reinforcing steel bar 5 protruding upwards;
the upper steel bars 4 are opposite to the lower steel bars 5 in position, and a grouting sleeve 3 is sleeved outside the upper steel bars 4, the part of the grouting sleeve 3 corresponding to the upper steel bars 4 is called a grout outlet end 13, and the part corresponding to the lower steel bars 5 is called a grouting end 12; in the embodiment, the side wall of the grouting end 12 of the grouting sleeve 3 is totally closed, the bottom surface of the grouting end 12 is close to or flush with the end surface 7 of the bottom of the precast concrete member 1, and the lower opening of the grouting end 12 is communicated with the gap; the periphery of the gap is sealed by sealing slurry 8 or other sealing materials and is communicated with a grouting pipe;
a reinforcing steel bar centering frame 14 is arranged in the slurry outlet device 2 of the slurry storage device, an upper reinforcing steel bar 4 penetrates through a center hole of the reinforcing steel bar centering frame 14 and is limited in the radial direction, a plurality of slurry passing holes are formed in the reinforcing steel bar centering frame 14, and the radial edge of the reinforcing steel bar centering frame 14 is supported on the surface of an inner cavity of the slurry storage and outlet device 2;
the lateral wall of grout outlet end 13 of grout sleeve 3 is totally closed, and the upper end of grout outlet end 13 upwards communicates and has store thick liquid grout outlet 2, store thick liquid grout outlet 2 and make by non-metallic material, its top has reinforcing bar patchhole 19, can supply upper portion reinforcing bar 4 is sealed to pass through (reinforcing bar patchhole 19 with grout sleeve 3 coaxial setting makes upper portion reinforcing bar 4 pass and store and can stretch into to grout sleeve 3 after thick liquid grout outlet 2), store the bottom of thick liquid grout outlet 2 and have sleeve connection end 15, can supply with the upper end sealing connection of grout outlet end 13 of grout sleeve 3, store the upper portion of thick liquid grout outlet 2 and have grout outlet 16, grout outlet 16 is connected with grout outlet pipe 17, grout outlet pipe 17 outwards extends to precast concrete member 1 surface.
When grouting connection is performed, grouting materials 5 are injected through a grouting pipe 11, enter a grouting end 12 of the grouting sleeve 3 upwards after the interval is filled, fill a gap between the grouting end 12 and a lower reinforcing steel bar 5, flow upwards to enter and fill a gap between a grout outlet end 13 of the grouting sleeve 3 and an upper reinforcing steel bar 4, flow upwards to enter and fill a gap between the grout storage grout discharger 2 and the upper reinforcing steel bar 4, and simultaneously fill a grout outlet 16 of the grout storage grout discharger 2 and a grout outlet pipe 17 connected with the grout outlet 16 until the grout outlet pipe 17 is filled, and then flow out of the precast concrete member 1.
Elastic sealing materials are arranged at the sleeve connecting end 15 and the reinforcing steel bar inserting hole 19 of the slurry storage and discharge device 2, so that slurry leakage of the slurry storage and discharge device 2 at the interface position is avoided.
The slurry storage and discharge device 2 is made of non-metal materials, and is of a single-piece integral structure formed by adhering elastic sealing materials to the sleeve connecting end 15 and the reinforcing steel bar inserting hole 19, or a multi-piece combined structure formed by combining a plurality of non-metal materials and elastic sealing materials.
The minimum distance between the inner cavity wall of the upper reinforcing steel bar section 25 coated by the slurry storage slurry outlet device 2 and the outer surface of the upper reinforcing steel bar 4 is not less than 8mm, and the length of the inner cavity part which has a distance of 8mm or more with the upper reinforcing steel bar 4 is 15 mm-45 mm.
Wherein the pulp outlet nozzle 16 of the pulp storage pulp outlet device 2 has an elevation angle larger than 0 degree.
The grouting sleeve 3 is a cylindrical full-grouting sleeve 3 with an inner cavity surface having a concave-convex structure, so that anchoring capability between the grouting material 5 and the inner cavity surface of the grouting sleeve 3 is enhanced.
Wherein, the reinforcing steel bar center frame 14 and the slurry storage and discharge device 2 can be of an integrated structure.
As shown in fig. 2 again, the second embodiment of the present invention is different only in that the gap is filled with a grouting material 23 and the lower port of the grouting sleeve 3 is sealed by a sealing cover 24, and no grouting pipe is connected, but a sidewall grouting hole 22 is formed on the side surface of the grouting end 12 of the grouting sleeve 3, the sidewall grouting hole 22 is connected with a grouting nozzle 20 and a grouting pipe 21 or directly connected with the grouting pipe 21, and the grouting pipe 21 extends outward to the outer surface of the precast concrete member 1. A steel bar centering frame 14 is arranged in a grout outlet end 13 of the grouting sleeve 3, the upper steel bar 4 penetrates through a center hole of the steel bar centering frame 14 and is limited in the radial direction, a plurality of grout passing holes are formed in the steel bar centering frame 14, and the radial edge of the steel bar centering frame 14 is supported on the surface of an inner cavity of a grout outlet end port of the grouting sleeve 3;
as shown in fig. 3, the third embodiment of the present invention is different only in that the slurry storage outlet 2 includes a coated upper steel bar section 25 and a slurry storage column 26, the slurry outlet 16 of the slurry storage outlet 2 is disposed on the upper portion of the slurry storage column 26, the slurry storage column 26 is disposed in the range of the included angle in the hook of the horizontal stirrup end installed on the upper steel bar 4, the installation of the horizontal stirrup disposed on the upper steel bar 4 by the precast concrete member 1 is not affected, and the length of the slurry storage column 26 is determined according to the slurry supplement requirement of the grouting sleeve. A reinforcing steel bar centering frame 14 is arranged in the slurry outlet device 2 of the slurry storage device, an upper reinforcing steel bar 4 penetrates through a center hole of the reinforcing steel bar centering frame 14 and is limited in the radial direction, a plurality of slurry passing holes are formed in the reinforcing steel bar centering frame 14, and the radial edge of the reinforcing steel bar centering frame 14 is supported on the surface of an inner cavity of the slurry storage and outlet device 2;
the utility model has the beneficial technical effects that:
1. the utility model discloses set up store thick liquid grout outlet 2 in grout sleeve 3 upper end, when making each grout sleeve 3 grout, grout sleeve 3 upper portion has all relied on store thick liquid grout outlet 2 and has stored grout 5 of certain volume, if grout 5 in grout sleeve 3 takes place to leak, grout 5 in store thick liquid grout outlet 2 can descend along with the decline of grout 5 thick liquid face in grout sleeve 3 promptly, replenish the inner chamber of grout sleeve 3, effectively guarantee the plumpness of grout 5 in grout sleeve 3;
2. the utility model discloses set up storage thick liquid outlet device 2 in grout sleeve 3 upper end, will move the detection to grout material 5 plumpness outside grout sleeve 3 from grout sleeve 3 is inside, the plumpness of grout material 5 in storage thick liquid outlet device 2 can directly perceivedly reflect the plumpness of grout material 5 in grout sleeve 3, has simplified the detection degree of difficulty of grout material 5 plumpness in grout sleeve 3 greatly; when the connection structure finishes grouting construction and grouting materials are hardened, if grouting materials 5 are reserved in the slurry storage and discharge device 2, the inner cavity of the grouting sleeve 3 is full, and when no grouting materials 5 are reserved in the slurry storage and discharge device 2, the inner cavity of the grouting sleeve 3 has high probability of being not full, and the grouting operation is required to be performed when the grouting is not full; compared with the existing grouting sleeve 3, the grouting fullness detection is more convenient and quicker to implement when nondestructive detection or local damaged drilling detection is carried out on the inner cavity of the slurry storage and discharge device 2, the detection cost is greatly reduced, and the detection accuracy is improved; when the slurry storage and discharge device 2 is made of non-metal materials, the ray method is adopted to detect the plumpness of the grouting material 5 in the slurry storage and discharge device 2, and the ray energy required by the plumpness of the grouting material 5 in the metal grouting sleeve 3 is lower, so that the detection is more convenient, the defect judgment in the picture phase is easier, and the available detection methods are more abundant;
3. the slurry storage and discharge device 2 provides a simple slurry supplementing scheme, and no matter the grouting material 5 in the grouting sleeve 3 is not full or the grouting material 5 in the slurry storage and discharge device 2 is not full, holes can be drilled from the outer side surface of the precast concrete member 1 to the slurry storage and discharge device 2, and the holes are drilled from the section and supplemented with slurry, so that the damage of a connecting piece caused by slurry supplementing of the holes drilled on the side wall of the grouting sleeve 3 is avoided, the difficulty of drilling the holes in the slurry storage and discharge device 2 is easier than that of drilling the holes in the grouting sleeve 3, and the slurry supplementing technology, the operation difficulty and the cost of the grouting sleeve 3 are greatly reduced;
4. the minimum distance between the inner cavity wall of the upper reinforcing steel bar section 25 coated by the slurry storage and outlet device 2 and the outer surface of the upper reinforcing steel bar 4 is not less than 8mm, and the length of the inner cavity part with the distance of 8mm and above is between 15 mm-45 mm, when the connection structure completes grouting construction and the grouting material is hardened, a core drilling method is adopted to obtain a grouting material small core block sample from the position of the slurry storage and outlet device 2, a group of grouting material small core block samples of the grouting sleeve slurry storage and outlet device connected by same batch grouting are compared with a group of small core block samples obtained by the same core drilling method on the same batch grouting material standard curing compressive strength test piece, so that the relationship between the grouting material in the batch grouting sleeve node and the known grouting material compressive strength can be obtained, because the grouting material 5 in the slurry storage and outlet device 2 is completely the same as the grouting material 5 in the sleeve, and under the same environmental curing condition, the sampling from the slurry storage and discharge device 2 completely solves the international problem that the entity of the grouting material 5 in the grouting sleeve 3 can not be sampled;
5. adopt the utility model discloses a grout sleeve 3 connecting elements can carry out the detection of various methods as required, can carry out necessary benefit thick liquid to not full joint and restore, checks calculation or the remedial measure that needs to the joint that grout material 5 intensity is not enough, makes grout sleeve 3's connection quality and problem handling no longer have blind area and blank point.
6. The steel bar centering frame 141 is arranged in the grout outlet end 13 of the grouting sleeve 3 or the grout outlet of the grout storage device, and more than two points of rigid supports for the upper steel bar 4 inserted into the grouting sleeve 3 are formed by the steel bar centering frame 4 and the steel bar inserting hole 19 of the grout storage device 2, so that the total length of the upper steel bar 4 in the grout outlet end 13 of the grouting sleeve 3 is basically coaxial with the grouting sleeve 3, and the problem that the joint connection performance is reduced due to the fact that the axis of the upper steel bar in the grout outlet end of the grouting sleeve is deflected, which cannot be avoided by supporting the upper steel bar by the elastic rubber plug of the port of the existing grouting sleeve in a single point mode.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. The utility model provides a vertical steel bar sleeve connection structure in middle of type that fills in milk, connects between the precast concrete member that is located upper portion and the vertical steel bar of the lower part structure body that is located the lower part, its characterized in that:
the precast concrete member has upper reinforcing bars protruding downward, and the lower structural body has lower reinforcing bars protruding upward;
the upper steel bar and the lower steel bar are opposite in position and externally sleeved with a grouting sleeve, the part of the grouting sleeve corresponding to the upper steel bar is a grout outlet end, and the part corresponding to the lower steel bar is a grouting end;
the grout outlet end of the grout sleeve is connected with a grout storage and outlet device, the top of the grout storage and outlet device is provided with a steel bar insertion hole for the upper steel bar to pass through in a sealing manner, the bottom of the grout storage and outlet device is provided with a sleeve connecting end for the upper end of the grout outlet end of the grout sleeve to be connected in a sealing manner, and the upper part of the grout storage and outlet device is provided with a grout outlet nozzle;
the grout outlet end of the grouting sleeve or the grout outlet device of the grout storage device is internally provided with a steel bar centering frame, the steel bar at the upper part passes through a center hole of the steel bar centering frame and is limited in the radial direction, the steel bar centering frame is provided with a plurality of grout passing holes, and the radial edge of the steel bar centering frame is supported on the surface of an inner cavity of the grouting sleeve or the surface of an inner cavity of the grout storage device.
2. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the slurry storage and discharge device is of a single-piece integral structure or a multi-piece combined structure, and the reinforcing steel bar insertion hole is coaxially arranged with the grouting sleeve.
3. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the minimum distance between the inner cavity wall of the upper reinforcing steel bar section coated by the slurry storage slurry discharging device and the outer surface of the upper reinforcing steel bar is not less than 8mm, and the length of the inner cavity part which has a distance of 8mm or more with the upper reinforcing steel bar is 15 mm-45 mm.
4. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the outer side of the upper reinforcing steel bar of the slurry storage and discharge device is also provided with a slurry storage column which is not coated with the upper reinforcing steel bar, and a slurry discharge nozzle of the slurry storage and discharge device is arranged at the upper part of the slurry storage column.
5. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the slurry outlet nozzle of the slurry storage and outlet device has an elevation angle larger than 0 degree.
6. The centered vertical steel bar sleeve grouting connection structure according to claim 5, characterized in that: and a slurry outlet nozzle of the slurry storage and outlet device is communicated with a slurry outlet pipe, and the slurry outlet pipe extends outwards to the outer surface of the precast concrete member.
7. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: and a space is arranged between the precast concrete member and the lower structural body, the grouting end of the grouting sleeve is communicated with the space, and the grouting end or the space is communicated with a grouting pipe.
8. The centered vertical steel bar sleeve grouting connection structure according to claim 7, characterized in that: the lateral wall of the grouting end of the grouting sleeve is totally closed, the bottom surface of the grouting end is close to or flush with the end surface of the bottom of the precast concrete member, and the periphery of the gap is closed and communicated with the grouting pipe.
9. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the grouting sleeve is a cylindrical full-grouting sleeve with an inner cavity surface provided with a concave-convex structure.
10. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: and the side wall of the grout outlet end of the grouting sleeve is totally closed.
11. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the slurry storage and discharge device is made of non-metal materials.
12. The centered vertical steel bar sleeve grouting connection structure according to claim 1, characterized in that: the reinforcing steel bar centering frame and the slurry storage and discharge device are of an integrated structure.
13. The centered vertical steel bar sleeve grouting connection structure according to claim 7, characterized in that: the periphery of the interval is sealed or filled and sealed, the side face of the grouting end of the grouting sleeve is provided with a side wall grouting hole, the side wall grouting hole is connected with a grouting nozzle and a grouting pipe or directly connected with a grouting pipe, and the grouting pipe extends outwards to the outer surface of the precast concrete member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022192063.5U CN213041491U (en) | 2020-09-29 | 2020-09-29 | Center-sized vertical steel bar sleeve grouting connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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