CN212078451U - Sleeve grouting connection joint and connection structure of prefabricated part - Google Patents

Sleeve grouting connection joint and connection structure of prefabricated part Download PDF

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Publication number
CN212078451U
CN212078451U CN202020392810.7U CN202020392810U CN212078451U CN 212078451 U CN212078451 U CN 212078451U CN 202020392810 U CN202020392810 U CN 202020392810U CN 212078451 U CN212078451 U CN 212078451U
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sleeve
reinforcing
steel bar
grouting
bar
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CN202020392810.7U
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郭海山
戢文占
王羽
张涛
曾涛
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China Construction Science and Technology Group Co Ltd
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China Construction Science and Technology Co Ltd
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Abstract

The utility model provides a connection structure of sleeve grout attach fitting and prefabricated component. The sleeve grouting connecting joint comprises a sleeve, a first reinforcing steel bar, a second reinforcing steel bar, a reinforcing assembly and grouting materials. The first reinforcing steel bar and the second reinforcing steel bar respectively extend into the sleeve from two ports of the sleeve. First reinforcing bar and second reinforcing bar all are equipped with a plurality of interval distribution's horizontal rib, and the grout fills telescopic cavity. The part of the first steel bar and/or the second steel bar extending into the sleeve is an anchoring section, and one or a plurality of reinforcing components are arranged on the anchoring section along the longitudinal direction of the anchoring section. The utility model discloses on the basis that does not reduce the reinforcing bar performance, additional one or a plurality of interval distribution's strengthening component on the reinforcing bar, this strengthening component protrusion reinforcing bar lateral surface can form buckle structure with the grout material of packing in the sleeve, has improved the bond stress of grout material to the reinforcing bar effectively to be favorable to improving connection quality, reduce telescopic total length, reduction in production cost.

Description

Sleeve grouting connection joint and connection structure of prefabricated part
Technical Field
The utility model belongs to the technical field of the reinforcing bar grout sleeve, especially, relate to a connection structure of sleeve grout attach fitting and prefabricated component.
Background
At present, the joint connection of the prefabricated concrete structure is widely connected by adopting the steel bar sleeve grouting, and the bond stress between the steel bar and the sleeve grouting material is mainly realized by the transverse rib.
In the national standards of the steel bar for concrete, specific technical requirements are provided for the rib shape and the size of the steel bar, but the parameters in the standards are a range, the upper limit and the lower limit of the parameters have larger difference, the steel bar is usually designed according to the lower limit of the rib height in consideration of process and cost factors during production, the diameter of the steel bar is reduced along with the parameter in the standard, the diameter of the rib for anchoring is also reduced along with the parameter, the anchoring effect between the rib and grouting material is reduced, particularly for large-diameter steel bars, the different rib shapes have obvious different bond stress on the steel bar, the reduction proportion of the diameter at the rib is larger, the reduction of the anchoring effect is more obvious, and the damage caused by insufficient bond stress is more easily caused. Consequently, strengthen the bond stress that the subassembly increases the reinforcing bar through setting up the anchor on anchor section reinforcing bar, especially to 32mm and above steel bar sleeve grout joint, the reinforcing bar atress back cross sectional dimension reduces the proportion big, can effectively improve the bond stress of reinforcing bar after strengthening the subassembly along the vertical installation anchor of reinforcing bar, the guarantee quality of connection reduces the anchor length of reinforcing bar in the sleeve, reduces sleeve length, practices thrift steel for the sleeve, reduction in production cost, improves the comprehensive properties that sleeve grout connects.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a sleeve grout attach fitting and prefabricated component's connection structure is provided, the sleeve grout among the aim at prior art mainly realizes through the reinforcing bar cross rib to the bond stress of reinforcing bar, the not enough problem of bond stress.
The utility model discloses a thus realized, a sleeve grout attach fitting, including hollow sleeve, first reinforcing bar, second reinforcing bar, reinforcement component and grout material, first reinforcing bar and second reinforcing bar stretch into in the cavity of sleeve from the both ends mouth of sleeve respectively, first reinforcing bar and second reinforcing bar all are provided with one or a plurality of transverse ribs that interval distribution, grout material fills the cavity of sleeve; the part of the first steel bar and/or the second steel bar extending into the cavity is an anchoring section, one or a plurality of reinforcing assemblies distributed at intervals are arranged on the outer side surface of the anchoring section along the longitudinal direction of the anchoring section, and the reinforcing assemblies protrude out of the outer side surface of the anchoring section.
Furthermore, one or a plurality of reinforcing components distributed at intervals are arranged along the longitudinal direction of the anchoring section of the first steel bar and/or the second steel bar, and the reinforcing components can be uniformly or non-uniformly distributed on the anchoring section.
Further, the reinforcing component is tubular, flaky or granular, and the cross section of the reinforcing component is circular or polygonal; the reinforcing component is closed or not closed; the reinforcing component is made of metal materials, inorganic materials or organic materials.
Further, the reinforcing component is connected with the anchoring section through a welding process, an extrusion process or an adhesion process.
Furthermore, a grouting port and a grout outlet which are communicated with the cavity are formed in the wall of the sleeve, the grouting port is close to the bottom end of the sleeve, and the grout outlet is close to the top end of the sleeve.
Furthermore, the sleeve is a semi-grouting sleeve, one end of the sleeve is an assembling end, the other end of the sleeve is a prefabricated end, an opening of the assembling end can be closed through or without a second rubber plug, a glue plug hole for the second steel bar to pass through is formed in the second rubber plug, the grouting port is formed in the cylinder wall of the bottom end of the assembling end, and the grout outlet is formed in the cylinder wall of the top end of the assembling end.
Further, the sleeve is the full grout sleeve, first reinforcing bar and second reinforcing bar all pass through the grout anchor is fixed, the open-top department of cavity is sealed through first plug, it has the confession to open on the first plug the gluey consent that first reinforcing bar passed, the bottom opening part accessible of cavity or not closed through the second plug, it has the confession to open on the second plug the plug hole that the second reinforcing bar passed.
The utility model provides a solve the above technical problem, still provide a connection structure of prefabricated component, it includes any one of above-mentioned sleeve grout attach fitting, upper prefabricated component and lower floor prefabricated component, first reinforcing bar is the upper reinforcing bar, the second reinforcing bar is the lower floor's reinforcing bar, pre-buried second reinforcing bar that stretches out lower floor's prefabricated component top in the lower floor's prefabricated component, pre-buried first reinforcing bar in the upper floor's prefabricated component, first reinforcing bar and second reinforcing bar one-to-one set up, the sleeve is pre-buried in the bottom of upper floor's prefabricated component, and with first reinforcing bar, second reinforcing bar one-to-one set up; the bottom surface of the upper-layer prefabricated part is fixedly connected to the top surface of the lower-layer prefabricated part; the bottom end of the first steel bar is inserted and fixed into the sleeve from the top of the sleeve, the bottom end face of the sleeve is flush with the top end face of the lower prefabricated part, and the part, extending into the lower prefabricated part, of the second steel bar is inserted and fixed into the sleeve from the bottom of the sleeve.
Furthermore, two rows of sleeves are arranged in the upper-layer prefabricated component, the two rows of sleeves are respectively an outer-side sleeve and an inner-side sleeve, a slurry outlet and a slurry injection port of the inner-side sleeve are directly communicated with the outer side surface of the upper-layer prefabricated component, and a slurry outlet and a slurry injection port of the outer-side sleeve are respectively communicated with the outer side surface of the upper-layer prefabricated component through a slurry outlet extension pipe and a slurry injection extension pipe.
Compared with the prior art, the utility model, beneficial effect lies in:
the utility model overcomes prior art's sleeve grout material is to the technical problem that the bond dynamics of wrapping up in of reinforcing bar is low, attaches one or a plurality of interval distribution's enhancement subassembly on the reinforcing bar, and the lateral surface of this enhancement subassembly protrusion reinforcing bar can form buckle structure with the grout material of filling in the sleeve, has improved grout material to the bond power of reinforcing bar effectively, and the guarantee quality of connection to be favorable to reducing telescopic total length, reduction in production cost.
Drawings
Fig. 1 is a schematic view of a grouting sleeve joint according to an embodiment of the present invention;
fig. 2a is a schematic front view of a reinforcing bar with a reinforcing member installed therein according to a first embodiment of the present invention;
FIG. 2b is a schematic cross-sectional view of FIG. 2a taken along section line A-A;
FIG. 2c is a schematic cross-sectional view of FIG. 2a taken along line B-B;
FIG. 3 is a schematic cross-sectional view of a differently shaped reinforcement assembly;
fig. 4 is a schematic view of a sleeve grouting connection joint formed with annular protrusions by roll forming according to an embodiment of the present invention;
fig. 5 is a schematic view of a grouting sleeve joint according to a second embodiment of the present invention;
fig. 6 is a schematic view of a sleeve grouting connection joint formed with annular protrusions by roll forming according to an embodiment of the present invention;
fig. 7 is a schematic view of a connection structure of prefabricated components according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, a grouting connection joint for a sleeve according to a first embodiment is shown, and includes a hollow sleeve 1, first reinforcing bars 2, second reinforcing bars 3, a reinforcing assembly 4, and a grouting material 5, where the first reinforcing bars 2 and the second reinforcing bars 3 extend into a cavity of the sleeve 1 from two ports of the sleeve 1, the first reinforcing bars 2 and the second reinforcing bars 3 are respectively provided with a plurality of transverse ribs 21 and transverse ribs 31 distributed at intervals, and the grouting material 5 fills the cavity of the sleeve 1.
The part of the second steel bar 3 extending into the cavity is an anchoring section, see fig. 2a to 2c, and one or several reinforcing members 4 are arranged at intervals along the longitudinal direction of the steel bar. And the part of the first reinforcing steel bar 2 extending into the cavity is in threaded connection with the inner wall of the sleeve 1.
Specifically, the anchoring section of the second steel bar 3 may be provided with one or several reinforcing components 4, which may be uniformly or non-uniformly distributed, according to the anchoring length.
The reinforcing component 4 can be connected with the anchoring section of the second steel bar 3 through welding, extrusion process, bonding process or other methods; the reinforcing member 4 may be in the form of a closed tube 4a, a one-sided open tube 4b or a two-sided butt tube 4c, see fig. 3. The reinforcing member 4 may be tubular, plate-like or granular, and its cross section is circular or polygonal, etc. The material of the reinforcing member 4 is metal, inorganic or organic.
The inner wall of the sleeve 1 is provided with a plurality of annular bulges 11 distributed at intervals, in the embodiment, the annular bulges 11 are distributed at the positions where the reinforcing steel bars at the end part of the sleeve 1 are inserted at even intervals, and are not arranged at the middle position of the sleeve 1.
The annular protrusion 11 is formed integrally with the sleeve 1 by casting, or by turning from a steel bar, see fig. 4, or by roll forming.
The sleeve 1 of the present embodiment is a half grouting sleeve, one end of which is an assembling end and the other end of which is a prefabricated end. The opening part of the assembling end is sealed by the second rubber plug 6, the second rubber plug 6 is provided with a rubber plug hole for the second steel bar 3 to pass through, the cylinder wall at the bottom end of the assembling end is provided with a grouting port 12 communicated with the cavity, the cylinder wall at the top end of the assembling end is provided with a grout outlet 13 communicated with the cavity, in the embodiment, the grouting port 12 and the grout outlet 13 are rigid short pipes, and the rigid short pipes are welded with holes penetrating through the cylinder wall of the sleeve 1 in advance or integrally formed with the cylinder body of the sleeve 1. The cavity of the sleeve 1 is filled with grouting material 5 flowing in through the grouting opening 12 and flowing out through the grout outlet 13, and the grouting opening 12 and the grout outlet 13 are plugged by plugs.
This embodiment has overcome the technical problem that sleeve grout material is low to the bond strength of reinforcing bar among the prior art, pass through welding or other technology installation one or a plurality of interval distribution's in the anchor section of second reinforcing bar 3 and strengthen subassembly 4, strengthen subassembly 4 protrusion in the lateral surface of second reinforcing bar 3, can form buckle structure with the grout material 5 of packing in sleeve 1, improved grout material 5 effectively and to the bond strength of second reinforcing bar 3, thereby be favorable to reducing sleeve 1's total length, reduction in production cost.
Referring to fig. 5, a sleeve grouting connection joint according to a second embodiment is shown, which includes a hollow sleeve 1, a first steel bar 2, a second steel bar 3, a reinforcing member 4 and a grouting material 5.
Different from the first embodiment, the sleeve 1 of this embodiment is the full grout sleeve, and first reinforcing bar 2 and second reinforcing bar 3 are all fixed through the grout anchor, and it all has the anchor section promptly to be first reinforcing bar 2 and second reinforcing bar 3, all sets up a plurality of interval distribution's reinforcement component 4 along the vertical of respective anchor section.
The top opening part of cavity seals through first plug 7, and it has the plug hole that supplies first reinforcing bar 2 to pass to open on the first plug 7, and the bottom opening part of cavity seals through second plug 6, and it has the gluey consent that supplies second reinforcing bar 3 to pass to open on the second plug 6.
Similarly, the inner wall of the sleeve 1 of the present embodiment is also provided with a plurality of annular protrusions 11 distributed at intervals; the annular protrusion 11 is formed integrally with the sleeve 1 by casting, or by turning from a steel bar, see fig. 6, or by roll forming.
Referring to fig. 7, the present embodiment further provides a connection structure of prefabricated components, which includes the sleeve grouting connection joint, the upper prefabricated component 7 and the lower prefabricated component 8. Wherein, first reinforcing bar 2 is the upper reinforcing bar, and second reinforcing bar 3 is the reinforcing bar of lower floor.
Second reinforcing steel bars 2 extending out of the tops of the lower prefabricated parts 8 are embedded in the lower prefabricated parts 8, first reinforcing steel bars 2 are embedded in the upper prefabricated parts 7, and the first reinforcing steel bars 2 and the second reinforcing steel bars 3 are arranged in a one-to-one correspondence mode, namely, the positions and the number of the first reinforcing steel bars are all corresponding to each other.
The sleeve 1 is pre-buried in the bottom of upper prefabricated component 7 to set up with first reinforcing bar 2, second reinforcing bar 3 one-to-one. The bottom surface of the upper prefabricated component 7 is fixedly connected to the top surface of the lower prefabricated component 8; the bottom end of the first steel bar 2 is inserted from the top of the sleeve 1 and fixed in the sleeve 1, the bottom end surface of the sleeve 1 is flush with the top end surface of the lower prefabricated part 8, the part of the second steel bar 3 extending out of the lower prefabricated part 8 is inserted from the bottom of the sleeve 1 and fixed in the sleeve 1, and the position of the top end surface of the second steel bar 3 extending into the sleeve 1 is not higher than the grout outlet 13.
Two rows of sleeves 1 are arranged in the upper-layer prefabricated part 7, the two rows of sleeves 1 are respectively an outer-side sleeve 1a and an inner-side sleeve 1b, a slurry outlet 13 and a slurry injection port 12 of the inner-side sleeve 1b are directly communicated with the outer side surface of the upper-layer prefabricated part 7, and the slurry outlet 13 and the slurry injection port 12 of the outer-side sleeve 1a are communicated with the outer side surface of the upper-layer prefabricated part 7 through a slurry injection extension pipe 14 and a slurry injection extension pipe 15 respectively.
The embodiment also provides a construction method of the connection structure, which comprises the following steps:
the method comprises the following steps: installing a required number of reinforcing components 4 on the anchoring sections of the first reinforcing steel bar 2 and the second reinforcing steel bar 3 along respective longitudinal directions by adopting a processing tool (such as welding equipment);
step two: determining the diameter, the wall thickness and the length of the sleeve 1 according to the diameters of the first reinforcing steel bar 2 and the second reinforcing steel bar 3, and then processing and forming the sleeve 1 in a factory;
step three: respectively processing and binding the second steel bars 3 and the first steel bars 2 in the lower-layer prefabricated part 8 and the upper-layer prefabricated part 7 according to design requirements, and then fixing grouting extension pipes 14 and grout outlet extension pipes 15 corresponding to the inner side sleeve 1b, the outer side sleeve 1a and the outer side sleeve 1a to preset positions of the upper-layer prefabricated part 7;
after checking, pouring concrete of the upper prefabricated part 7 and the lower prefabricated part 8 and maintaining the concrete until the concrete is qualified;
fifthly, transporting the upper-layer prefabricated part 7 and the lower-layer prefabricated part 8 to a construction site, and inserting the top of the second steel bar 3 in the lower-layer prefabricated part 8 into the inner sleeve 1b and the outer sleeve 1a in the upper-layer prefabricated part 7;
step six: preparing grouting material 5, respectively injecting the grouting material 5 into the inner sleeve 1b and the outer sleeve 1a from the grouting port 12 and the grouting extension pipe 14, after the sleeve 1 is filled with the grouting material 5, the grouting material 5 overflows from the grouting port 13 and the grouting extension pipe 15 corresponding to the sleeve 1, then sealing the grouting port 13, the grouting extension pipe 15, the grouting port 12 and the grouting extension pipe 14, and finishing grouting;
and seventhly, finishing the construction of the connecting structure after the grouting material 5 in the sleeve 1 is hardened and reaches the designed strength.
In this embodiment, the upper prefabricated component 7 and the lower prefabricated component 8 are both columns or walls of vertical prefabricated components. The prefabricated part connecting structure further comprises a horizontal superposed component, the horizontal superposed component comprises a prefabricated bottom 91 and a cast-in-place top 92, the top side surface of the lower-layer prefabricated component 8 is flush with the bottom side surface of the prefabricated bottom 91, and concrete 93 which is integrally poured with the cast-in-place top 92 and has a flush top surface is poured between the lower-layer prefabricated component 8 and the upper-layer prefabricated component 7. The second steel bar 3 penetrates through the concrete 93 and extends into the upper prefabricated part 7.
The sleeve grout attach fitting and the prefabricated component connection structure of this embodiment, the technical problem that among the prior art the sleeve grout material is low to the bond-up dynamics of reinforcing bar is overcome, this embodiment is on the basis that does not reduce the reinforcing bar performance, additional one or a plurality of interval distribution's on first reinforcing bar 2 and second reinforcing bar 3 enhancement subassembly 4, this enhancement subassembly 4 protrusion in the lateral surface of reinforcing bar, can form buckle structure with the grout material of filling in sleeve 1, the bond-up power of grout material to the reinforcing bar has been improved effectively, thereby be favorable to reducing telescopic total length, and the production cost is reduced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. A grouting connection joint for a sleeve comprises a hollow sleeve, a first steel bar, a second steel bar, a reinforcing assembly and grouting materials, wherein the first steel bar and the second steel bar extend into a cavity of the sleeve from two ports of the sleeve respectively; the reinforced concrete structure is characterized in that the part of the first steel bar and/or the second steel bar, which extends into the cavity, is an anchoring section, one or a plurality of reinforcing components distributed at intervals are arranged on the outer side surface of the anchoring section along the longitudinal direction of the anchoring section, and the reinforcing components protrude out of the outer side surface of the anchoring section.
2. A slip joint coupling according to claim 1, wherein the anchored section of the first and/or second reinforcing bars is provided with one or more spaced apart reinforcing elements longitudinally thereof, the reinforcing elements being evenly or unevenly distributed over the anchored section.
3. A grouted connection according to claim 1, wherein the reinforcing member is in the form of a tube, a sheet or a pellet, and has a closed or non-closed circular or polygonal cross-section, and is made of a metal, an inorganic or an organic material.
4. A grouted connection according to claim 1, wherein the reinforcing member is connected to the anchoring section by a welding process, an extrusion process or an adhesive process.
5. The grouting connection joint of any one of claims 1 to 4, wherein a grouting port and a grout outlet port which are communicated with the cavity are formed in the wall of the sleeve, the grouting port is close to the bottom end of the sleeve, and the grout outlet port is close to the top end of the sleeve.
6. The grouting connection joint of a sleeve according to claim 5, wherein the sleeve is a semi-grouting sleeve, one end of the sleeve is an assembling end, the other end of the sleeve is a prefabricated end, the opening of the assembling end can be closed through or without a second rubber plug, the second rubber plug is provided with a plug hole for the second steel bar to pass through, the cylindrical wall at the bottom end of the assembling end is provided with the grouting port, and the cylindrical wall at the top end of the assembling end is provided with the grout outlet.
7. The grouting connection joint of claim 6, wherein the sleeve is a fully grouting sleeve, the first steel bar and the second steel bar are anchored and fixed by the grouting material, the top opening of the cavity is sealed by a first rubber plug, the first rubber plug is provided with a rubber plug hole for the first steel bar to pass through, the bottom opening of the cavity is sealed by a second rubber plug or not, and the second rubber plug is provided with a rubber plug hole for the second steel bar to pass through.
8. A connecting structure of prefabricated parts, which is characterized by comprising the sleeve grouting connecting joint, the upper-layer prefabricated part and the lower-layer prefabricated part, wherein the first steel bars are upper-layer steel bars, the second steel bars are lower-layer steel bars, the second steel bars extending out of the top of the lower-layer prefabricated part are pre-embedded in the lower-layer prefabricated part, the first steel bars are pre-embedded in the upper-layer prefabricated part, the first steel bars and the second steel bars are arranged in a one-to-one correspondence manner, and the sleeves are pre-embedded in the bottom of the upper-layer prefabricated part and are arranged in a one-to-one correspondence manner with the first steel bars and the second steel bars; the bottom surface of the upper-layer prefabricated part is fixedly connected to the top surface of the lower-layer prefabricated part; the bottom end of the first steel bar is inserted and fixed into the sleeve from the top of the sleeve, the bottom end face of the sleeve is flush with the top end face of the lower prefabricated part, and the part, extending into the lower prefabricated part, of the second steel bar is inserted and fixed into the sleeve from the bottom of the sleeve.
9. The connecting structure according to claim 8, wherein two rows of said sleeves are provided in said upper prefabricated member, said two rows of said sleeves are respectively an outer sleeve and an inner sleeve, a slurry outlet and a slurry injection port of said inner sleeve are directly connected to an outer side surface of said upper prefabricated member, and a slurry outlet and a slurry injection port of said outer sleeve are connected to an outer side surface of said upper prefabricated member through a slurry outlet extension pipe and a slurry injection extension pipe, respectively.
CN202020392810.7U 2020-03-24 2020-03-24 Sleeve grouting connection joint and connection structure of prefabricated part Active CN212078451U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112726868A (en) * 2020-12-24 2021-04-30 河北建工建筑装配股份有限公司 Vertical connected node of unit-installment shear force wall
CN116201294A (en) * 2023-04-26 2023-06-02 中铁城建集团第一工程有限公司 Combined steel bar grouting sleeve structure and installation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112726868A (en) * 2020-12-24 2021-04-30 河北建工建筑装配股份有限公司 Vertical connected node of unit-installment shear force wall
CN116201294A (en) * 2023-04-26 2023-06-02 中铁城建集团第一工程有限公司 Combined steel bar grouting sleeve structure and installation method
CN116201294B (en) * 2023-04-26 2023-07-21 中铁城建集团第一工程有限公司 Combined steel bar grouting sleeve structure and installation method

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