CN105019606A - Precast concrete unit steel bar grouting connecting piece and connecting method - Google Patents

Precast concrete unit steel bar grouting connecting piece and connecting method Download PDF

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Publication number
CN105019606A
CN105019606A CN201510464862.4A CN201510464862A CN105019606A CN 105019606 A CN105019606 A CN 105019606A CN 201510464862 A CN201510464862 A CN 201510464862A CN 105019606 A CN105019606 A CN 105019606A
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China
Prior art keywords
reinforcing bar
metal sleeve
grouting
precast unit
stack
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CN201510464862.4A
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Chinese (zh)
Inventor
吴涛
徐亚洲
刘全威
张磊
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Changan University
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Changan University
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Priority to CN201510464862.4A priority Critical patent/CN105019606A/en
Publication of CN105019606A publication Critical patent/CN105019606A/en
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Abstract

The invention discloses a precast concrete unit steel bar grouting connecting piece and connecting method. The connecting piece comprises a metal sleeve for connecting two steel bars, two sealing rings and a grouting structure formed by a grouting material which is poured into the metal sleeve, wherein the metal sleeve is in a fish-bellied shape; the two steel bars comprise a first steel bar which is inserted into the metal sleeve from top to bottom and arranged in a first precast concrete unit to be constructed, and a second steel bar which is inserted into the metal sleeve from bottom to top and arranged in a second precast concrete unit formed by construction; and an exhaust hole and a grouting hole are formed in the metal sleeve. The connecting method comprises the following steps: (1) installing the first steel bar and the metal sleeve; (2) installing an exhaust pipe and a grouting pipe; (3) carrying out concrete pouring of the first precast concrete unit; (4) hoisting the first precast concrete unit, and carrying out plug-in mounting of the second steel bar; (5) grouting; and (6) curing. The precast concrete unit steel bar grouting connecting piece and connecting method have the advantages that the design is reasonable, the realization is convenient, the using effect is good, the steel bar connecting process can be simply, conveniently and quickly finished, and the connection is reliable.

Description

A kind of precast unit reinforcing bar grouting connector and method of attachment
Technical field
The invention belongs to precast unit technical field of construction, especially relate to a kind of precast unit reinforcing bar grouting connector and method of attachment.
Background technology
Development architectural industrialization is the right-about that architecture production mode is produced from extensive production to intensive style, is inevitable approach and the developing direction of industry modernization.Adopting prefabricated assembled concrete structure to be the effective way realizing architectural industrialization, is take concrete prefabricated element as main member, through the concrete structure that assembling, connection and part are cast-in-place.External concrete prefabricated element and steel concrete are almost started to walk simultaneously, and the industrialization precast unit in Modern Significance just obtains true development before half a century.
The bar connecting mode adopted in existing precast concrete mainly contains sleeve grouting connection and is connected two kinds of connected modes with constraint slurry anchor.During actual use, above-mentioned two kinds of connected modes cut both ways.Wherein, the major advantage of sleeve grouting connected mode connects reliably, but because the connecting portion size of prefabricated assembled concrete structure is less, and currently used branch sleeve size is comparatively large, internal construction is complicated, and not only processing and fabricating cost is high, complex process, steel demand is larger, and bar connecting difficulty is high, construction inconvenience, time-consuming; And the major advantage of constraint slurry anchor connected mode is cheap, but complex manufacturing technology, it is very long that bar splicing obtains length, wastes reinforcing bar and be unfavorable for construction.In addition, when current employing sleeve connection mode carries out bar connecting, neither one is unified, specification and concrete construction method can be followed, and inevitably there is the problems such as constructing operation is more random, lack of standardization, complex operation, construction work is lower, quality of connection is poor during practice of construction.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of precast unit reinforcing bar grouting connector is provided, simple, the reasonable in design and processing and fabricating of its structure and use easy and simple to handle, result of use good, can easy, the bar connecting process that completes precast unit fast and connect reliable.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of precast unit reinforcing bar grouting connector, it is characterized in that: comprise the metal sleeve for connecting two reinforcing bars, two sealing rings being laid in metal sleeve upper and lower side respectively and the grouting structure formed by the grouting material be poured between metal sleeve and two described reinforcing bars in cavity, described metal sleeve is the branch sleeve of fish belly shape, and two described reinforcing bars are fastenedly connected by grouting structure and metal sleeve and are integrated; Two described reinforcing bars are respectively the first reinforcing bar inserted in metal sleeve and the second reinforcing bar inserted from the bottom to top in metal sleeve from top to bottom, and the upper end of described metal sleeve has the upper reinforcing bar socket for the first reinforcing bar insertion and its lower end has the lower reinforcing bar socket inserted for the second reinforcing bar; Two described sealing rings are respectively and carry out the upper sealing ring of shutoff to described upper reinforcing bar socket and described lower reinforcing bar socket is carried out to the lower seal of shutoff, are interference fit between described upper reinforcing bar socket and upper sealing ring and between described lower reinforcing bar socket and lower seal; Described upper ring set on the first reinforcing bar, and upper sealing ring has the through hole penetrated for the first reinforcing bar; Described lower seal is sleeved on the second reinforcing bar, and lower seal has the through hole penetrated for the second reinforcing bar, and described first reinforcing bar is identical with the diameter of the second reinforcing bar; The cross section of described metal sleeve is circular and largest diameter in the middle part of it, the middle part outer diameter D 1 >=2.5d+20mm of described metal sleeve and the outer diameter D 2 >=2.5d+10mm at its upper and lower two ends, and wherein d is the diameter of the first reinforcing bar; The lap length L > 8d of described first reinforcing bar and the second reinforcing bar; The side wall upper part of described metal sleeve has a steam vent and its lower sidewall has a grout hole.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, is characterized in that: described metal sleeve is ductile iron cylinder.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, is characterized in that: the compressive strength of 28 days of described grouting structure is not less than 85MPa.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, is characterized in that: the spacing between described first reinforcing bar bottom and lower seal end face and between the second reinforcing bar top and upper sealing ring bottom surface is 5mm ~ 10mm; Described upper sealing ring and lower seal are rubber seal; The wall thickness of described metal sleeve is 3mm ~ 5mm; The thickness of described upper sealing ring and lower seal is 6mm ~ 10mm.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, is characterized in that: two described reinforcing bars are parallel laying and the two is all parallel laying with metal sleeve.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, is characterized in that: the space D 3=0.4d ~ 0.6d between two described reinforcing bars.
Above-mentioned a kind of precast unit reinforcing bar grouting connector, it is characterized in that: described steam vent is equipped with stack, described grout hole is equipped with grout pipe, described stack and grout pipe are all vertical runs with metal sleeve and the two is pvc pipe.
Simultaneously, the invention also discloses a kind of method step simple, reasonable in design, realize convenient and joint efficiency is high, the precast unit reinforcing bar of good connecting effect grouting method of attachment, it is characterized in that: in two reinforcing bars that need connect, first reinforcing bar is be laid in the reinforcing bar to be connected in the first precast unit to be onstructed, described second reinforcing bar is be laid in the embedded bar in the second precast unit of construction molding, and the upper end of described second reinforcing bar extend out to outside the second precast unit; Described steam vent is equipped with stack, described grout hole is equipped with grout pipe, described stack and grout pipe are all vertical runs with metal sleeve; When two described reinforcing bars are connected, comprise the following steps:
Step one, the first reinforcing bar and metal sleeve are installed: before carrying out concreting to the first precast unit, according to the installation position of the first reinforcing bar designed in advance at the first precast unit, by the first reinforcement installation being used for constructing in the forming panel of the first precast unit; Afterwards, the lower end plug-in mounting of the first reinforcing bar is entered in metal sleeve, and by upper sealing ring, shutoff is carried out to described upper reinforcing bar socket;
Step 2, stack and grout pipe are installed: the stack that metal sleeve described in step one is installed and grout pipe; The outer end of described stack and grout pipe all extend out to outside described forming panel, the inner of described stack is arranged on steam vent that metal sleeve is offered, the inner of grout pipe is arranged on grout hole that metal sleeve is offered, described forming panel has the Pipe installing hole that discharge hoses and grout pipe are installed;
Step 3, the first precast unit concreting: utilize forming panel described in step one, carry out concreting to the first precast unit, obtain the first precast unit of construction molding; Described first reinforcing bar and metal sleeve are all built in the first precast unit;
Step 4, the first precast unit lifting and the second reinforcing bar plug-in mounting: adopt hanging device to be lifted above the second precast unit by the first precast unit of construction molding in step 3, and the first precast unit is transferred, the second reinforcing bar pre-buried in second precast unit is inserted in metal sleeve from the bottom to top, and by lower seal, shutoff is carried out to described lower reinforcing bar socket;
Step 5, grouting: open stack and grout pipe, and in metal sleeve, pour into grouting material continuously by grout pipe; When there being grouting material to discharge in stack, shutoff is carried out to stack; When grouting material is full of metal sleeve inside, stop perfusion grouting material, obtain grouting structure;
Step 6, maintenance: to being in the milk described in step 5, structure carries out maintenance, after maintenance completes, complete the connection procedure of two described reinforcing bars.
Said method, is characterized in that: when carrying out maintenance to described grouting structure in step 6, curing age is no less than 28 days, and the compressive strength of 28 days of described grouting structure is not less than 85MPa.
Said method, is characterized in that: the bottom surface of the first precast unit described in step 3 (3) is mutually concordant with the bottom surface of metal sleeve; When carrying out the first precast unit lifting and the second reinforcing bar plug-in mounting in step 4, after institute's concreting final set in step 3, more described hanging device is adopted to lift the first precast unit; After stack described in step 2 and grout pipe installation, also need to carry out shutoff respectively to the outer end of stack and grout pipe.
The present invention compared with prior art has the following advantages:
1, the reinforcing bar grouting connecting-piece structure adopted is simple, reasonable in design and input cost is low.
2, the reinforcing bar grouting connector processing and fabricating adopted is easy and appearance and size is little, takes up room little.
3, use easy and simple to handle, easy construction and the connecting method for reinforcing bars step adopted simple, reasonable in design, realize convenient and joint efficiency is high, good connecting effect, adopt fish belly shape metal sleeve to carry out in the first precast unit outside pore-forming, the effect of constraint grouting material can also be played.Starch compared with anchor connects with constraint, eliminate the operation of pore-forming technique and configuration constraint stirrup, be in the milk in the reinforcing bar that two need need be connected an insertion metal sleeve, can connection be completed.Simultaneously, because metal sleeve is fish belly shape, and produce relative axial force between the grouting material of microdilatancy with metal sleeve inwall, radial systolic pressure is produced to grouting material, make the grouting material of microdilatancy more tightly banding need connecting reinforcement, considerably increase the bonding strength needing connecting reinforcement, and then add the tensile strength of junction.
In addition, linkage interface safely, reliably, metal sleeve adopts ductile iron to make and its profile is designed to fish-bellied type shape small in ends broad in the middle, form shear connector, all not easily interfacial failure occurs between grouting material and the inwall of metal sleeve in the outer concrete of metal sleeve outer wall and cylinder and metal sleeve, interface connects reliable.
4, result of use is good and practical value is high, economical and practical, bar connecting process can be completed easy, fast and connect reliable, the easy quick connection realized between reinforcing bar of energy, and the accuracy of alignment of reinforcing bar requires low, easy to operate and saving of work and time, efficiency of construction is high, and bonding strength is reliable, has good economic benefit.Simultaneously, by limiting the structure of metal sleeve each several part and size, add and appropriate design is carried out to method of attachment step, reach overall dimensions little, take up room little, economize material, the effect such as construction technology is easy, quality of connection is reliable, when bar connecting performance and steady quality sexual satisfaction correlation technique code, economic and technical norms of the present invention substantially exceed existing cement grouting steel bar joint.Be in the milk compared with connection with ordinary cartridge, the reinforcing bar connected due to ordinary cartridge grouting is docking, and in the present invention, two connecting reinforcements are overlap joints, and the anchorage zone of two connecting reinforcements overlaps, therefore further reduce the size of metal sleeve, reduce the cost of metal sleeve.In addition, when adopting the present invention to carry out bar connecting construction, do not need complicated plant equipment and facility, also do not need power consumption, job site is dry operation substantially, and energy-conserving and environment-protective, avoid all drawbacks of traditional reinforcing bar connected mode.To sum up, the present invention combines sleeve grouting and to connect and constraint slurry anchor is connected the advantage of two kinds of connecting method for reinforcing bars, connects safe and reliable, processing and fabricating and construct simple, and comprehensive sexual valence is higher.
5, widely applicable and popularizing application prospect is extensive, can be applied to the bar connecting in the prefabricated assembled concrete components such as beam, post and wall.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the using state schematic diagram of reinforcing bar of the present invention grouting connector.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is method flow block diagram when adopting the present invention to carry out bar connecting.
Description of reference numerals:
1-upper sealing ring; 2-stack; 3-the first precast unit;
4-the second reinforcing bar; 5-grout pipe; 6-the second precast unit;
7-the first reinforcing bar; 8-metal sleeve; 9-grouting structure;
10-lower seal.
Detailed description of the invention
A kind of precast unit reinforcing bar grouting connector as shown in Figure 1 and Figure 2, the sealing ring that the metal sleeve 8, two comprised for connecting two reinforcing bars is laid in metal sleeve 8 upper and lower side respectively and the grouting structure 9 formed by the grouting material be poured between metal sleeve 8 and two described reinforcing bars in cavity, described metal sleeve 8 is the branch sleeve of fish belly shape, and two described reinforcing bars are fastenedly connected by grouting structure 9 and metal sleeve 8 and are integrated.Two described reinforcing bars are respectively the first reinforcing bar 7 inserted in metal sleeve 8 and the second reinforcing bar 4 inserted from the bottom to top in metal sleeve 8 from top to bottom, and the upper end of described metal sleeve 8 has the upper reinforcing bar socket for the first reinforcing bar 7 insertion and its lower end has the lower reinforcing bar socket inserted for the second reinforcing bar 4.Two described sealing rings are respectively and carry out the upper sealing ring 1 of shutoff to described upper reinforcing bar socket and described lower reinforcing bar socket is carried out to the lower seal 10 of shutoff, are interference fit between described upper reinforcing bar socket and upper sealing ring 1 and between described lower reinforcing bar socket and lower seal 10.Described upper sealing ring 1 is sleeved on the first reinforcing bar 7, and upper sealing ring 1 has the through hole penetrated for the first reinforcing bar 7; Described lower seal 10 is sleeved on the second reinforcing bar 4, and lower seal 10 has the through hole penetrated for the second reinforcing bar 4, and described first reinforcing bar 7 is identical with the diameter of the second reinforcing bar 4.The cross section of described metal sleeve 8 is circular and largest diameter in the middle part of it, the middle part outer diameter D 1 >=2.5d+20mm of described metal sleeve 8 and the outer diameter D 2 >=2.5d+10mm at its upper and lower two ends, and wherein d is the diameter of the first reinforcing bar 7.The lap length L > 8d of described first reinforcing bar 7 and the second reinforcing bar 4.The side wall upper part of described metal sleeve 8 has a steam vent and its lower sidewall has a grout hole.
In the present embodiment, the middle part outer diameter D 1=2.5d+20mm of described metal sleeve 8 and the outer diameter D 2=2.5d+10mm at its upper and lower two ends.
During practice of construction, can according to specific needs, the middle part outer diameter D 1 of metal sleeve 8 and the value size of upper and lower two ends outer diameter D 2 be adjusted accordingly.
In the present embodiment, described metal sleeve 8 is ductile iron cylinder.
During actual use, described metal sleeve 8 also can adopt the sleeve of other material, as stainless steel sleeve etc.
During practice of construction, the spacing between described first reinforcing bar 7 bottom and lower seal 10 end face and between the second reinforcing bar 4 top and upper sealing ring 1 bottom surface is 5mm ~ 10mm; Described upper sealing ring 1 and lower seal 10 are rubber seal; The wall thickness of described metal sleeve 8 is 3mm ~ 5mm; The thickness of described upper sealing ring 1 and lower seal 10 is 6mm ~ 10mm.The through hole that confession second reinforcing bar 4 that the through hole that confession first reinforcing bar 7 that described upper sealing ring 1 is offered penetrates and lower seal 10 are offered penetrates is in being laid staggeredly.
In the present embodiment, two described reinforcing bars be parallel laying and the two all with metal sleeve 8 in parallel laying.
Further, the space D 3=0.4d ~ 0.6d between two described reinforcing bars.
In the present embodiment, the space D 3=0.5d between two described reinforcing bars.
During practice of construction, can according to specific needs, the value size of D3 be adjusted accordingly.
In the present embodiment, described steam vent is equipped with stack 2, described grout hole is equipped with grout pipe 5, described stack 2 and grout pipe 5 are all vertical runs with metal sleeve 8 and the two is pvc pipe.
In the present embodiment, described steam vent is positioned at directly over described grout hole.
Further, described stack 2 and grout pipe 5 are in parallel laying.
In the present embodiment, the grouting material be poured between metal sleeve 8 and two described reinforcing bars in cavity is High Performance Cement Without Shrinkage grouting material.
Described High Performance Cement Without Shrinkage grouting material take cement as base material, and what add the composition such as natural high strength aggregate, Concrete admixtures in right amount is dry mixed material, has the characteristics such as high fluidity, early strong, high-strength, microdilatancy after blunge.
Actual when using, because metal sleeve 8 be fish-bellied type shape small in ends broad in the middle, strengthen outside it without the need to arranging stirrup, structure is simple, processing and fabricating and installing lays conveniently, result of use is good.
A kind of precast unit reinforcing bar grouting method of attachment as shown in Figure 3, in two reinforcing bars that need connect, first reinforcing bar 7 is for being laid in the reinforcing bar to be connected in the first precast unit 3 to be onstructed, described second reinforcing bar 4 is for being laid in the embedded bar in the second precast unit 6 of construction molding, and the upper end of described second reinforcing bar 4 extend out to outside the second precast unit 6; Described steam vent is equipped with stack 2, described grout hole is equipped with grout pipe 5, described stack 2 and grout pipe 5 all with metal sleeve 8 in vertical runs; When two described reinforcing bars (i.e. the first reinforcing bar 7 and the second reinforcing bar 4) are connected, comprise the following steps:
Step one, the first reinforcing bar and metal sleeve are installed: before carrying out concreting to the first precast unit 3, according to the installation position of the first reinforcing bar 7 designed in advance at the first precast unit 3, the first reinforcing bar 7 is arranged on for constructing in the forming panel of the first precast unit 3; Afterwards, the lower end plug-in mounting of the first reinforcing bar 7 is entered in metal sleeve 8, and by upper sealing ring 1, shutoff is carried out to described upper reinforcing bar socket;
Step 2, stack and grout pipe are installed: the stack 2 that metal sleeve 8 described in step one is installed and grout pipe 5; The outer end of described stack 2 and grout pipe 5 all extend out to outside described forming panel, the inner of described stack 2 is arranged on steam vent that metal sleeve 8 is offered, the inner of grout pipe 5 is arranged on grout hole that metal sleeve 8 is offered, described forming panel has the Pipe installing hole that discharge hoses 2 and grout pipe 5 are installed;
Step 3, the first precast unit concreting: utilize forming panel described in step one, carry out concreting to the first precast unit 3, obtains the first precast unit 3 of construction molding; Described first reinforcing bar 7 and metal sleeve 8 are all built in the first precast unit 3;
Step 4, the first precast unit lifting and the second reinforcing bar plug-in mounting: adopt hanging device to lift above the second precast unit 6 by the first precast unit 3 of construction molding in step 3, and the first precast unit 3 is transferred, the second reinforcing bar 4 pre-buried in second precast unit 6 is inserted in metal sleeve 8 from the bottom to top, and by lower seal 10, shutoff is carried out to described lower reinforcing bar socket;
Step 5, grouting: open stack 2 and grout pipe 5, and in metal sleeve 8, pour into grouting material continuously by grout pipe 5; When having grouting material to discharge in stack 2, shutoff is carried out to stack 2; When grouting material is full of metal sleeve 8 inside, stop perfusion grouting material, obtain grouting structure 9;
Step 6, maintenance: to being in the milk described in step 5, structure 9 carries out maintenance, after maintenance completes, completes the connection procedure of two described reinforcing bars.
In the present embodiment, when carrying out maintenance to described grouting structure 9 in step 6, curing age is no less than 28 days, and the compressive strength of 28 days of described grouting structure 9 is not less than 85MPa and the difference of the expansion rate of its 24h and 3h is 0.02% ~ 0.5%.
In the present embodiment, described in step 3, the bottom surface of the first precast unit 3 is mutually concordant with the bottom surface of metal sleeve 8; When carrying out the first precast unit lifting and the second reinforcing bar plug-in mounting in step 4, after institute's concreting final set in step 3, more described hanging device is adopted to lift the first precast unit 3; After stack 2 described in step 2 and grout pipe 5 installation, also need to carry out shutoff respectively to the outer end of stack 2 and grout pipe 5.
Further, when carrying out shutoff to the outer end of stack 2 and grout pipe 5, rubber seal is all adopted to carry out shutoff.
As shown in the above, during practice of construction, first the first reinforcing bar 7 and metal sleeve 8 are positioned over installation site corresponding in described forming panel, and the first reinforcing bar 7 lower end plug-in mounting is entered in metal sleeve 8; Afterwards, respectively shutoff is carried out to the outer end of described upper reinforcing bar socket and stack 2 and grout pipe 5, then concreting is carried out to the first precast unit 3, make metal sleeve 8 build in the first precast unit 3; Until build the concrete final set of the first precast unit 3 after, first precast unit 3 is lifted, and inserted in metal sleeve 8 from the bottom to top by the second reinforcing bar 4 pre-buried in the second precast unit 6, then shutoff is carried out to described lower reinforcing bar socket; Then, carry out pressure grouting by grout pipe 5, pour into grouting material to metal sleeve 8 specifically continuously, carry out maintenance after being in the milk, namely complete the connection procedure of reinforcing bar.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. a precast unit reinforcing bar grouting connector, it is characterized in that: comprise the metal sleeve (8) for connecting two reinforcing bars, two sealing rings being laid in metal sleeve (8) upper and lower side respectively and the grouting structure (9) formed by the grouting material be poured between metal sleeve (8) and two described reinforcing bars in cavity, the branch sleeve that described metal sleeve (8) is fish belly shape, two described reinforcing bars are fastenedly connected by grouting structure (9) and metal sleeve (8) and are integrated; Two described reinforcing bars are respectively the first reinforcing bar (7) inserted in metal sleeve (8) and the second reinforcing bar (4) inserted from the bottom to top in metal sleeve (8) from top to bottom, and the upper end of described metal sleeve (8) has the upper reinforcing bar socket that inserts for the first reinforcing bar (7) and its lower end has the lower reinforcing bar socket inserted for the second reinforcing bar (4); Two described sealing rings are respectively and carry out the upper sealing ring (1) of shutoff to described upper reinforcing bar socket and described lower reinforcing bar socket is carried out to the lower seal (10) of shutoff, are interference fit between described upper reinforcing bar socket and upper sealing ring (1) and between described lower reinforcing bar socket and lower seal (10); Described upper sealing ring (1) is sleeved on the first reinforcing bar (7), and upper sealing ring (1) has the through hole penetrated for the first reinforcing bar (7); Described lower seal (10) is sleeved on the second reinforcing bar (4), and lower seal (10) having the through hole penetrated for the second reinforcing bar (4), described first reinforcing bar (7) is identical with the diameter of the second reinforcing bar (4); The cross section of described metal sleeve (8) is circular and largest diameter in the middle part of it, the middle part outer diameter D 1 >=2.5d+20mm of described metal sleeve (8) and the outer diameter D 2 >=2.5d+10mm at its upper and lower two ends, wherein d is the diameter of the first reinforcing bar (7); The lap length L > 8d of described first reinforcing bar (7) and the second reinforcing bar (4); The side wall upper part of described metal sleeve (8) has a steam vent and its lower sidewall has a grout hole.
2., according to a kind of precast unit reinforcing bar grouting connector according to claim 1, it is characterized in that: described metal sleeve (8) is ductile iron cylinder.
3., according to a kind of precast unit reinforcing bar grouting connector described in claim 1 or 2, it is characterized in that: the compressive strength of 28 days of described grouting structure (9) is not less than 85MPa.
4., according to a kind of precast unit reinforcing bar grouting connector described in claim 1 or 2, it is characterized in that: the spacing between described first reinforcing bar (7) bottom and lower seal (10) end face and between the second reinforcing bar (4) top and upper sealing ring (1) bottom surface is 5mm ~ 10mm; Described upper sealing ring (1) and lower seal (10) are rubber seal; The wall thickness of described metal sleeve (8) is 3mm ~ 5mm; The thickness of described upper sealing ring (1) and lower seal (10) is 6mm ~ 10mm.
5., according to a kind of precast unit reinforcing bar grouting connector described in claim 1 or 2, it is characterized in that: two described reinforcing bars be parallel laying and the two all with metal sleeve (8) in parallel laying.
6., according to a kind of precast unit reinforcing bar grouting connector according to claim 5, it is characterized in that: the space D 3=0.4d ~ 0.6d between two described reinforcing bars.
7. according to a kind of precast unit reinforcing bar grouting connector described in claim 1 or 2, it is characterized in that: described steam vent is equipped with stack (2), grout pipe (5) described grout hole is equipped with, described stack (2) and grout pipe (5) all with metal sleeve (8) in vertical runs and the two is pvc pipe.
8. the method utilizing reinforcing bar grouting connector as claimed in claim 1 to connect reinforcing bar, it is characterized in that: in two reinforcing bars that need connect, first reinforcing bar (7) is for being laid in the reinforcing bar to be connected in the first precast unit (3) to be onstructed, described second reinforcing bar (4) is for being laid in the embedded bar in second precast unit (6) of construction molding, and the upper end of described second reinforcing bar (4) extend out to the second precast unit (6) outside; Described steam vent is equipped with stack (2), described grout hole is equipped with grout pipe (5), described stack (2) and grout pipe (5) all with metal sleeve (8) in vertical runs; When two described reinforcing bars are connected, comprise the following steps:
Step one, the first reinforcing bar and metal sleeve are installed: before carrying out concreting to the first precast unit (3), according to the first reinforcing bar (7) installation position in the first precast unit (3) designed in advance, the first reinforcing bar (7) is arranged on for constructing in the forming panel of the first precast unit (3); Afterwards, the lower end plug-in mounting of the first reinforcing bar (7) is entered in metal sleeve (8), and by upper sealing ring (1), shutoff is carried out to described upper reinforcing bar socket;
Step 2, stack and grout pipe are installed: the stack (2) that metal sleeve (8) is above installed described in step one and grout pipe (5); The outer end of described stack (2) and grout pipe (5) all extend out to outside described forming panel, the inner of described stack (2) is arranged on steam vent that metal sleeve (8) is offered, the inner of grout pipe (5) is arranged on grout hole that metal sleeve (8) is offered, described forming panel has the Pipe installing hole that discharge hoses (2) and grout pipe (5) are installed;
Step 3, the first precast unit concreting: utilize forming panel described in step one, carry out concreting to the first precast unit (3), obtains first precast unit (3) of construction molding; Described first reinforcing bar (7) and metal sleeve (8) are all built in the first precast unit (3);
Step 4, the first precast unit lifting and the second reinforcing bar plug-in mounting: adopt hanging device by the lifting of first precast unit (3) of construction molding in step 3 to the second precast unit (6) top, and the first precast unit (3) is transferred, pre-buried the second reinforcing bar (4) in second precast unit (6) is inserted in metal sleeve (8) from the bottom to top, and by lower seal (10), shutoff is carried out to described lower reinforcing bar socket;
Step 5, grouting: open stack (2) and grout pipe (5), and by grout pipe (5) perfusion grouting material in metal sleeve (8) continuously; When having grouting material to discharge in stack (2), shutoff is carried out to stack (2); When grouting material is full of metal sleeve (8) inside, stop perfusion grouting material, obtain grouting structure (9);
Step 6, maintenance: to being in the milk described in step 5, structure (9) carries out maintenance, after maintenance completes, completes the connection procedure of two described reinforcing bars.
9. in accordance with the method for claim 8, it is characterized in that: when carrying out maintenance to described grouting structure (9) in step 6, curing age is no less than 28 days, the compressive strength of 28 days of described grouting structure (9) is not less than 85MPa.
10. according to the method described in claim 8 or 9, it is characterized in that: the bottom surface of the first precast unit described in step 3 (3) is mutually concordant with the bottom surface of metal sleeve (8); When carrying out the first precast unit lifting and the second reinforcing bar plug-in mounting in step 4, after institute's concreting final set in step 3, more described hanging device is adopted to lift the first precast unit (3); After stack described in step 2 (2) and grout pipe (5) installation, also need to carry out shutoff respectively to the outer end of stack (2) and grout pipe (5).
CN201510464862.4A 2015-08-02 2015-08-02 Precast concrete unit steel bar grouting connecting piece and connecting method Pending CN105019606A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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Publication number Priority date Publication date Assignee Title
CN106958204A (en) * 2017-05-10 2017-07-18 上海市城市建设设计研究总院(集团)有限公司 Packaged type bridges are integrally in the milk connecting-type sleeve with large scale high intensity
CN106958203A (en) * 2017-05-10 2017-07-18 上海市城市建设设计研究总院(集团)有限公司 The packaged type bridges grouting connecting-type sleeve of large scale high intensity half
CN108643367A (en) * 2018-05-18 2018-10-12 中石化广州工程有限公司 A kind of connection structure of precast reinforced concrete beam column and connection method
CN108643367B (en) * 2018-05-18 2019-09-17 中石化广州工程有限公司 A kind of connection structure and connection method of precast reinforced concrete beam column
CN109779011A (en) * 2019-01-23 2019-05-21 山东建筑大学 The method and structure of microorganism grouting anchor connection concrete component longitudinal reinforcement

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Application publication date: 20151104