CN102392511A - Sleeve pressure type grouting construction method for steel reinforcement connection - Google Patents
Sleeve pressure type grouting construction method for steel reinforcement connection Download PDFInfo
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- CN102392511A CN102392511A CN2011103251192A CN201110325119A CN102392511A CN 102392511 A CN102392511 A CN 102392511A CN 2011103251192 A CN2011103251192 A CN 2011103251192A CN 201110325119 A CN201110325119 A CN 201110325119A CN 102392511 A CN102392511 A CN 102392511A
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Abstract
The invention relates to the technical field of building construction, in particular to a sleeve pressure type grouting construction method for steel reinforcement connection. The method relates to the connection between a lower element assembled with a steel reinforcement and a precast element in which a plurality of connecting sleeves are pre-buried, wherein an overflow hole and a grouting hole below the overflow hole are formed on the side wall of each connecting sleeve. The invention is characterized in that the method comprises the following steps: selecting any of the connecting sleeves, connecting the grouting hole of the selected connecting sleeve with a grouting pipe in a sealed way, connecting the overflow hole of the selected connecting sleeve with a pressure gauge in a sealed way, and connecting the grouting hole and the overflow hole of each of the rest connecting sleeves with two one-way valves respectively in a sealed way; connecting the connecting parts of the precast element and the lower element into a whole in a sealed way through a sealing device; pumping slurry into the present connecting sleeve through the grouting pipe; and stopping grouting after the pressure gauge displays that the pressure reaches a threshold value. The method provided by the invention has the advantages that the structure is simple, the use is convenient, and the qualification rate of connecting sleeve grouting is greatly improved.
Description
Technical field
The present invention relates to technical field of building construction, be specifically related to a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for.
Background technology
In the prior art that building reinforced concrete is built, two reinforcing bars are connected one mainly contain following several kinds of modes: the mutual welding of reinforcing bar, sleeve pipe press joining method, crooked binding method.The construction of above-mentioned several kinds of connected modes is comparatively complicated, and must before concreting, accomplish the reinforcing bar connection, is not suitable for the assembling construction of precast concrete.And in the construction of prefabricated reinforced concrete structure, adopt a kind of reinforcing steel bar connecting sleeve tube to connect usually.This connected mode principle is roughly following: see through the hollow type reinforcing steel bar connecting sleeve tube of casting, reinforcing bar penetrates sleeve inner from both ends open, need not overlap or fuse, and between reinforcing bar and sleeve, fills the structural mortar of high strength microdilatancy, promptly accomplishes the steel bar joining action.The mechanism of its connection mainly receives the Shu Zuoyong that encloses of sleeve with mortar; Add and itself have the microdilatancy characteristic; Positive acting power between enhancing and reinforcing bar, sleeve inboard by this, reinforcing bar promptly by the frictional force of this positive force and rough surface generation, transmits reinforcement stresses.Grout sleeve syndeton bonding strength is good, and easy to operate, in the prefabricated reinforced concrete structure, is used widely.
But in the above-mentioned sleeve connected mode; Usually adopt the mode that is positioned at the top of overfolw hole in the grout hole; Grouting is from the grout hole of its sidewall, to pour into the structural mortar of high strength microdilatancy, the slit that filled with mortar tube wall and reinforcing bar form, and under the effect of gravity, flow out from overfolw hole.Generally can not poured into slurries so be positioned at the grout hole superjacent air space in the sleeve cavity, reduced bonding strength.And in filling process, between the formed slit of tube wall and reinforcing bar, especially have certain proportion in the gap of two steel bar ends and hole occurs, cause the bonding strength of reinforcing bar to reduce.And when prefabricated building components was installed, whether the reinforced bar sleeve after grouting is accomplished did not have plant and instrument can nondestructive testing qualified, and not with the method for its dismounting.In case resident air and then hole occurs in the slip casting will cause building potential safety hazard to occur.Still do not have at present and a kind ofly can guarantee branch sleeve grouting qualified constructure scheme fully.
Summary of the invention
The objective of the invention is weak point according to above-mentioned prior art; A kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for is proposed; Through elastomeric pad and Sealing formboard prefabricated units and lower member are constituted a sealed whole body; And on branch sleeve, be tightly connected Grouting Pipe, pressure meter and one way valve, afterwards through the mode of pressure type slip casting, improved the qualification rate of grouting.
The object of the invention is accomplished by following technical scheme:
A kind of sleeve force due to centrifugal action formula grouting construction method that is used for the reinforcing bar connection; Relate to the connection between the prefabricated units that have the lower member of assembling reinforcing bar and be embedded with some branch sleeves; Offer overfolw hole on the said branch sleeve sidewall and be positioned at the grout hole of overfolw hole below, it is characterized in that this method has following steps:
In said some branch sleeves, select the grout hole of any branch sleeve Grouting Pipe, the overfolw hole pressure meter that is tightly connected that is tightly connected, and grout hole and the overfolw hole that will the remain branch sleeve one way valve that all is tightly connected;
Adopt sealing device that said prefabricated units and lower member joint are tightly connected and be one;
Slurries are pumped in the current branch sleeve through Grouting Pipe;
Pressure meter stops slip casting after showing that pressure reaches threshold value.
Said method comprises that also mending slurry confirms step:
Treat said stop slip casting after, unload Grouting Pipe and pressure meter on the current branch sleeve, and the one way valve that on its grout hole and overfolw hole, is tightly connected;
In said residue branch sleeve, select any one, at its grout hole Grouting Pipe, overfolw hole pressure meter that is tightly connected that is tightly connected;
Slurries are pumped in the current branch sleeve through Grouting Pipe;
Pressure meter stops slip casting after showing that pressure reaches threshold value.
Said method also comprises the steps: before slip casting in said branch sleeve, adopts air pump to ventilate in branch sleeve through Grouting Pipe, to test the sealing performance of said branch sleeve and sealing device.
Said sealing device comprises elastomeric pad, Sealing formboard and connector; The concrete steps of its be tightly connected prefabricated units and lower member are: the surface in the nearly lower member of said prefabricated units place coats said elastomeric pad, and coats said elastomeric pad on surface, the nearly prefabricated units of lower member place; Suit Sealing formboard on elastomeric pad; Adopt connector that said Sealing formboard, elastomeric pad are fixed on said prefabricated units and lower member at last.
Said connector comprises bolt, and said bolt passes through said Sealing formboard, elastomeric pad and said prefabricated units and/or lower member bolt.
Said connector comprises the lock ring device, and said lock ring device is set in the Sealing formboard outside.
Said prefabricated units sidewall and said lower member upper surface join and constitute L shaped structure; In the said plurality of elastic pad some are coated on said prefabricated units sidewall and the end to end closed circular that is; The residual elasticity pad is covered in said lower member upper surface and is closed circular around said prefabricated units; Said Sealing formboard shape and said prefabricated units form fit also are set with said elastomeric pad and prefabricated units; Said Sealing formboard lower end is provided with flange, reaches flange in said lower member upper surface, the said elastomeric pad and stacks successively from the bottom to top.
Said grout hole and overfolw hole inwall are provided with internal thread, and all have been threaded and two lead to adapter, and said two lead to and take over the other end connection transition nuts that has been threaded, and said connection transition nuts thread seal connects said one way valve, pressure meter and Grouting Pipe.
Said grout hole is positioned at the bottom of said branch sleeve sidewall.
Term in the technique scheme " current branch sleeve " is defined as hereby and means the branch sleeve that is selected as current slip casting, promptly is connected with the branch sleeve of pressure meter and Grouting Pipe.
Advantage of the present invention is: simple in structure, easy to use; Improved the qualification rate of branch sleeve grouting greatly.
Description of drawings
Fig. 1 is embodiment 1 a related device overall structure sketch map;
Fig. 2 is the local enlarged diagram of Fig. 1;
Fig. 3 is embodiment 1 a formwork seal structural profile sketch map;
Fig. 4 is embodiment 2 formwork seal structural profile sketch mapes.
The specific embodiment
Through embodiment characteristic of the present invention and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Shown in Fig. 1-4, mark 1-18 is respectively among the figure: prefabricated units 1, branch sleeve 2, lower member 3, elastomeric pad 4, Sealing formboard 5, adjustment bolt 6, stirrup 7, precast reinforced 8, assembling reinforcing bar 9, flange 10, two lead to take over 11, transition attaching nut 12, grouting pressure table 13, one way valve 14, grouting pump 15, Grouting Pipe 16, grout hole 17, overfolw hole 18.
Embodiment 1:
Referring to accompanying drawing 1, the described a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for of present embodiment relates generally between prefabricated units 1 and the lower member 3 fixing through branch sleeve 2 slip castings connection.Lower member 3 upper surfaces are raised with assembling reinforcing bar 9, and prefabricated units 1 are held on the lower member 3.Prefabricated units 1 are rectangular-shaped structure, and its four sidewalls join with lower member 3 upper surfaces respectively and constitute L shaped turning.Prefabricated units 1 inside be embedded with some precast reinforced 8 with some branch sleeves 2, it is precast reinforced 8 that the opening of branch sleeve 2 upper ends is fitted with, lower ending opening is fitted with assembling reinforcing bar 9.Offer on the sidewall of branch sleeve 2 and grout hole of its internal communication 17 and overfolw hole 18, wherein overfolw hole 18 is positioned at the top of grout hole 17.Especially it should be noted that owing to adopt overfolw hole 18 to be positioned at the tube-in-tube structure of the top of grout hole 17 here, be different from conventional mode from bottom to top and be in the milk, but adopt high pressure slip casting from lower to upper, so just need the formwork seal structure to seal.After branch sleeve 2 inside pour into slurries, precast reinforced 8 and assembling reinforcing bar 9 between promptly connect through branch sleeve 2 fixing.But common grouting mode can't guarantee that its connection is all qualified, so guarantee its qualification rate through the mode of high pressure slip casting.For this reason, elastomeric pad 4 and Sealing formboard 5 have been set up.The concrete structure of above-mentioned related device is following:
Because prefabricated units 1 have L shaped turning with lower member 3; So adopting, elastomeric pad 4 divides body structure; Be that in the plurality of elastic pad 4 some are coated on the nearly lower member of prefabricated units 1 sidewall 3 places; And the end to end closed circular that is, 4 upper surfaces that place lower member 3 of remaining other elastomeric pads, and at prefabricated units 1 outer rim formation closed circular.The shape of Sealing formboard 5 main bodys and said prefabricated units 1 form fit have rectangular-shaped inner chamber, and its lower end horizontal-extending are provided with flange 10.The main part of Sealing formboard 5 is set in outside elastomeric pad 4 and the prefabricated units 1, and through stirrup 7 Sealing formboard, elastomeric pad 4 and prefabricated units 1 three is fixed.10 of flanges are pressed on the elastomeric pad 4 that is arranged on the lower member 3, and pass through flange 10, the elastomeric pad 4 and lower member 3 bolts of said Sealing formboard 5 through adjustment bolt 6.Thus, through elastomeric pad 4 and Sealing formboard 5 prefabricated units 1 and lower member 3 are sealed into one.The elastomeric material that elastomeric pad 4 can adopt intensity and elasticity to satisfy required performance is processed, like vulcanized butyl rubber etc. not.
For pouring into slurries in the inner chamber that is implemented in branch sleeve 2, the side-walls of branch sleeve 2 nearly bottoms offers the grout hole 17 with its internal communication, and grout hole 17 is by the outward extending pipe shape of branch sleeve 2 sidewalls; The side-walls of nearly upper end offers the overfolw hole 18 with its internal communication on the branch sleeve 2, and overfolw hole 10 is by the outward extending pipe shape of branch sleeve 2 sidewalls equally; The internal diameter of grout hole 17 is greater than overfolw hole 18 internal diameters.Be similarly the effect of playing sealing, grout hole 17 and overfolw hole 18 inwalls are provided with internal thread 8, are connected with Grouting Pipe 16 parts such as grade through the mode that is threaded, and have guaranteed the sealing of grouting.
In conjunction with above-mentioned apparatus structure, the concrete steps that are used for the sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects are following:
Said prefabricated units 1 and lower member 3 butt joint completion;
In said some branch sleeves in prefabricated units 1; Select any branch sleeve 2; And the Grouting Pipe 16 that on the grout hole 17 of this branch sleeve 2, is tightly connected, the overfolw hole 18 grouting pressure table 13 that is tightly connected, an one way valve 14 all is tightly connected on the grout hole 17 of residue branch sleeve 2 and the overfolw hole 18.Because lower member 3 has the slit with lower member 3 joints, branch sleeve 2 both ends open places have the slit equally, so be in the state of connection between the branch sleeve 2.Slurries can overflow from the lower ending opening of the branch sleeve 2 of current slip casting during slip casting, and get in other branch sleeves 2, so need on the grout hole 17 of the branch sleeve 2 of slip casting and the overfolw hole 18 one way valve not to be set;
Surface at said prefabricated units 1 nearly lower member 3 places coats elastomeric pad 4, and coats elastomeric pad 4 on surface, lower member 3 nearly lower member 3 places.The said Sealing formboard 5 of suit on elastomeric pad 4.Adopt adjustment bolt 6 and/or stirrup 7 that said Sealing formboard 5, elastomeric pad 4 are fixed on said prefabricated units 1 and lower member 3 at last;
Adopt air pump in branch sleeve 2, to ventilate, with the sealing performance at the threaded connection place, elastomeric pad 4 and Sealing formboard 5 places that test said branch sleeve 2 through Grouting Pipe 16.During ventilation, the gas that pours in the branch sleeve 2 enters in the inside and both gaps of prefabricated units 1 and lower member 3 from both ends open, and by elastomeric pad 4 and Sealing formboard 5 shutoff.So work as grouting pressure table 13 reading just often, the said structure sealing performance is qualified, carries out next step; Like undesired (pressure is less than normal value), go wrong the test of ventilating again after inspection and the correction in the then above-mentioned hermetically-sealed construction;
Drive through grouting pump 15, slurries are pumped in the current branch sleeve 2 through Grouting Pipe 16;
After grouting pressure table 13 shows that pressure reaches threshold value, stop slip casting.Threshold value described herein should be according to the concrete specification of grouting pump 15, Grouting Pipe 16, branch sleeve 2, and the sealing performance of hermetically-sealed construction is carried out concrete selection.Before practice of construction, should test repeatedly, reach how many times to confirm that pressure in branch sleeve 2 and the member is minimum, can guarantee that its inside hole can not occur, manometric threshold value when this numerical value is slip casting.
After stopping slip casting, unload Grouting Pipe 16 and grouting pressure table 13 on this branch sleeve 2, and the one way valve 14 that on its grout hole 17 and overfolw hole 18, is tightly connected;
In above-mentioned residue branch sleeve 2, select any one, at its grout hole 17 Grouting Pipe 16, overfolw hole 18 grouting pressure table 13 that is tightly connected that is tightly connected;
Slurries are pumped in the current branch sleeve 2 through Grouting Pipe 16; Because during first branch sleeve 2 grouting; Slurries have got in all the other branch sleeves 2, so this step reality is confirmed step for mending slurry, treat to stop slip casting after pressure meter demonstration pressure reaches threshold value.Successively residue branch sleeve 2 being mended slurry afterwards confirms;
After slip casting is accomplished, treat that slurries solidify precast reinforced 8 on the prefabricated units 1 of back and are connected with assembling reinforcing bar 9 on the lower member 3 and finish.
Embodiment 2:
Present embodiment is described in the job practices; Remainder member and corresponding construction process are roughly the same; Formwork seal under different building structure structure mainly is provided; Referring to Fig. 4, lower member 3 has identical cross section with prefabricated units 1, so can adopt an elastomeric pad 4 that the two is sealed simultaneously.When promptly Sealing formboard being installed, 4 times halves of elastomeric pad are coated on surface, lower member 3 nearly prefabricated units 1 place, its first half is coated on surface, prefabricated units 1 nearly lower member 3 places, and the whole end to end closed circular that is.Sealing formboard 5 then integral body compresses sealing through twice stirrup 7 afterwards with elastomeric pad 4 suits.
Although abovely carry out detailed description through numerous different embodiment for embodiment of the present invention, the scope of law that it will be appreciated by those skilled in the art that this description is limited the words of appending claims of the present invention.It only is exemplary that this detailed description should be interpreted as, rather than describes each possible embodiment.The structure of above elastomeric pad 4 and Sealing formboard 5 is applicable to that mainly lower member 3 and prefabricated units 1 joint have the situation at turning, so be equally applicable to the prefabricated units 1 of cylindric or prism-shaped.And for the sealing of using reinforcing steel bar connecting sleeve tube 2 positions in the architectural construction; Because the variation of building structure; Should according to the prefabricated units that are embedded with branch sleeve 21 and with the concrete shape of the lower member 3 of prefabricated units 1 assembling; And the structure of the two joint, select the concrete structure of elastomeric pad 4 and Sealing formboard 5, and the two is pressed abd fixed on prefabricated units 1 and the lower member 3 through suitable connector.
Claims (9)
1. one kind is used for the sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects; Relate to the connection between the prefabricated units that have the lower member of assembling reinforcing bar and be embedded with some branch sleeves; Offer overfolw hole on the said branch sleeve sidewall and be positioned at the grout hole of overfolw hole below, it is characterized in that this method has following steps:
In said some branch sleeves, select the grout hole of any branch sleeve Grouting Pipe, the overfolw hole pressure meter that is tightly connected that is tightly connected, and grout hole and the overfolw hole that will the remain branch sleeve one way valve that all is tightly connected;
Adopt sealing device that said prefabricated units and lower member joint are tightly connected and be one;
Slurries are pumped in the current branch sleeve through Grouting Pipe;
Pressure meter stops slip casting after showing that pressure reaches threshold value.
2. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 1 is characterized in that also comprising that mending slurry confirms step:
Treat said stop slip casting after, unload Grouting Pipe and pressure meter on the current branch sleeve, and the one way valve that on its grout hole and overfolw hole, is tightly connected;
In said residue branch sleeve, select any one, at its grout hole Grouting Pipe, overfolw hole pressure meter that is tightly connected that is tightly connected;
Slurries are pumped in the current branch sleeve through Grouting Pipe;
Pressure meter stops slip casting after showing that pressure reaches threshold value.
3. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 1; It is characterized in that said method also comprises the steps: before slip casting in said branch sleeve; Adopt air pump in branch sleeve, to ventilate, to test the sealing performance of said branch sleeve and sealing device through Grouting Pipe.
4. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 1; It is characterized in that said sealing device comprises elastomeric pad, Sealing formboard and connector; The concrete steps of its be tightly connected prefabricated units and lower member are: the surface in the nearly lower member of said prefabricated units place coats said elastomeric pad, and coats said elastomeric pad on surface, the nearly prefabricated units of lower member place; Suit Sealing formboard on elastomeric pad; Adopt connector that said Sealing formboard, elastomeric pad are fixed on said prefabricated units and lower member at last.
5. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 4; It is characterized in that: said connector comprises bolt, and said bolt passes through said Sealing formboard, elastomeric pad and said prefabricated units and/or lower member bolt.
6. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 4, it is characterized in that: said connector comprises the lock ring device, said lock ring device is set in the Sealing formboard outside.
7. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 4; It is characterized in that: said prefabricated units sidewall and said lower member upper surface join and constitute L shaped structure; In the said plurality of elastic pad some are coated on said prefabricated units sidewall and the end to end closed circular that is; The residual elasticity pad is covered in said lower member upper surface and is closed circular around said prefabricated units; Said Sealing formboard shape and said prefabricated units form fit also are set with said elastomeric pad and prefabricated units; Said Sealing formboard lower end is provided with flange, reaches flange in said lower member upper surface, the said elastomeric pad and stacks successively from the bottom to top.
8. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 1; It is characterized in that: said grout hole and overfolw hole inwall are provided with internal thread; And all be threaded and two led to adapter; Said two lead to and take over the other end connection transition nuts that has been threaded, and said connection transition nuts thread seal connects said one way valve, pressure meter and Grouting Pipe.
9. a kind of sleeve force due to centrifugal action formula grouting construction method that reinforcing bar connects that is used for according to claim 1, it is characterized in that: said grout hole is positioned at the bottom of said branch sleeve sidewall.
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| CN 201110325119 CN102392511B (en) | 2011-10-24 | 2011-10-24 | Sleeve pressure type grouting construction method for steel reinforcement connection |
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| CN 201110325119 CN102392511B (en) | 2011-10-24 | 2011-10-24 | Sleeve pressure type grouting construction method for steel reinforcement connection |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314314A (en) * | 2014-11-17 | 2015-01-28 | 中冶建筑研究总院有限公司 | Grouting connection construction method |
| CN106401191A (en) * | 2016-10-26 | 2017-02-15 | 曲周县和盛新型建筑材料有限公司 | Grouting device for steel shear structure assembling type building and construction method of grouting device |
| CN107338744A (en) * | 2017-07-25 | 2017-11-10 | 江联重工集团股份有限公司 | A kind of hard shoulder concrete pours into a mould longitudinal reinforcement intermittence sealing device |
| CN107476498A (en) * | 2017-08-09 | 2017-12-15 | 上海宝冶工程技术有限公司 | A kind of sleeve is vertically in the milk special fixture |
| CN108104376A (en) * | 2017-11-29 | 2018-06-01 | 上海建工五建集团有限公司 | Prefabricated components sleeve grouting metering control and method |
| CN109469265A (en) * | 2018-11-02 | 2019-03-15 | 中民筑友建设科技集团有限公司 | A kind of plugging device of adjacent vertical member seam |
| CN109469264A (en) * | 2018-11-02 | 2019-03-15 | 中民筑友建设科技集团有限公司 | The plugging plate and plugging device in a kind of grout sleeve connection storehouse |
| CN109736573A (en) * | 2018-12-14 | 2019-05-10 | 东南大学 | A kind of built-in tamping equipment based on sleeve post grouting construction |
| CN111851865A (en) * | 2019-04-25 | 2020-10-30 | 润弘精密工程事业股份有限公司 | Reinforcing steel bar coupler and precast building structure with same |
| CN113668898A (en) * | 2021-09-26 | 2021-11-19 | 昆山市建设工程质量检测中心 | Filling and renovation method for defect of air pocket type grouting in middle of sleeve |
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| CN102071774A (en) * | 2009-11-23 | 2011-05-25 | 黑龙江宇辉新型建筑材料有限公司 | Insertion grouted reinforcing steel bar connecting sleeve and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314314A (en) * | 2014-11-17 | 2015-01-28 | 中冶建筑研究总院有限公司 | Grouting connection construction method |
| CN106401191A (en) * | 2016-10-26 | 2017-02-15 | 曲周县和盛新型建筑材料有限公司 | Grouting device for steel shear structure assembling type building and construction method of grouting device |
| CN107338744A (en) * | 2017-07-25 | 2017-11-10 | 江联重工集团股份有限公司 | A kind of hard shoulder concrete pours into a mould longitudinal reinforcement intermittence sealing device |
| CN107338744B (en) * | 2017-07-25 | 2023-06-02 | 江联重工集团股份有限公司 | Intermittent sealing device for longitudinal steel bars of concrete pouring of hard shoulder |
| CN107476498A (en) * | 2017-08-09 | 2017-12-15 | 上海宝冶工程技术有限公司 | A kind of sleeve is vertically in the milk special fixture |
| CN108104376A (en) * | 2017-11-29 | 2018-06-01 | 上海建工五建集团有限公司 | Prefabricated components sleeve grouting metering control and method |
| CN109469264A (en) * | 2018-11-02 | 2019-03-15 | 中民筑友建设科技集团有限公司 | The plugging plate and plugging device in a kind of grout sleeve connection storehouse |
| CN109469264B (en) * | 2018-11-02 | 2021-02-05 | 中民筑友建设科技集团有限公司 | Plugging plate and plugging device of grouting sleeve communicating bin |
| CN109469265B (en) * | 2018-11-02 | 2021-02-05 | 中民筑友建设科技集团有限公司 | Plugging device of adjacent vertical component seam |
| CN109469265A (en) * | 2018-11-02 | 2019-03-15 | 中民筑友建设科技集团有限公司 | A kind of plugging device of adjacent vertical member seam |
| CN109736573A (en) * | 2018-12-14 | 2019-05-10 | 东南大学 | A kind of built-in tamping equipment based on sleeve post grouting construction |
| CN111851865A (en) * | 2019-04-25 | 2020-10-30 | 润弘精密工程事业股份有限公司 | Reinforcing steel bar coupler and precast building structure with same |
| CN113668898A (en) * | 2021-09-26 | 2021-11-19 | 昆山市建设工程质量检测中心 | Filling and renovation method for defect of air pocket type grouting in middle of sleeve |
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| CN102392511B (en) | 2013-08-28 |
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