CN104790663A - Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment - Google Patents
Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment Download PDFInfo
- Publication number
- CN104790663A CN104790663A CN201510207859.4A CN201510207859A CN104790663A CN 104790663 A CN104790663 A CN 104790663A CN 201510207859 A CN201510207859 A CN 201510207859A CN 104790663 A CN104790663 A CN 104790663A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- limit
- temperature
- steel bar
- warm heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a fabricated structure reinforcing steel bar sleeve grouting connection construction method under the low-temperature environment. The method comprises the steps that 1, after assembly and welding of a connecting reinforcing steel bar, a reinforcing steel bar stirrup and a sleeve are completed according to the design requirement, a self-limiting temperature electric heating strip is evenly and compactly wound around the sleeve; then a fabricated concrete member is cast, and the self-limiting temperature electric heating strip is embedded into concrete to form a prefabricated part; 2, after the prefabricated part is installed on site, the surface of the fabricated concrete member is covered with a heat insulation material; 3, the self-limiting temperature electric heating strip is powered on for heating, meanwhile, a grouting material is poured into the sleeve, and electric heat of the self-limiting electric heating strip is utilized for keeping the grouting material inside the reinforcement steel bar at the temperature being 45+/-5 DEG C for maintenance for 30 min to 72 h. According to the construction method, the grouting material is heated and maintained by means of the self-limiting temperature electric heating strip, the maintenance temperature is stable, the heat efficiency is high, the influence of the low temperature environment on the project quality can be reduced to the greatest extent, and limitations of the building height and member sizes are avoided.
Description
Technical field
The present invention relates to building structural element, particularly a kind of fabricated construction reinforced bar sleeve grouting connection construction method under low temperature environment.
Background technology
At present, assembled arthitecutral structure node mostly adopts sleeve grouting link technique.Sleeve grouting connection is a kind of precast unit link technique of comparative maturity, its principle inserts in butt muff by reinforcing bar, then in sleeve, inject by grouting machine the ungauged regions high strength grout be made up of cement, expansion agent, fines and high performance additive etc. material, when after grouting material sclerosis, reinforcing bar and sleeve link into an integrated entity securely.According to " prefabricated concrete structure tecnical regulations " (JGJ1-2014) regulation, during sleeve grouting, mean daily temperature should lower than 5 DEG C.During winter construction, as engineering to gain in strength without particular/special requirement, after grouting, exposed part should covered with plastic film add a cover heat insulating material in time, and initial curing temperature should lower than 5 DEG C.The lowest construction temperature required lower than strength cement-based grouting material as environment temperature or when needing to accelerate gain in strength, can only adopt Heat artificially maintenance method, comprise stream curing method, brooder method, electric blanket method, iodine-tungsten lamp method etc.Heat artificially maintenance should take sufficient water conservation moist keeping measures, and curing temperature must not more than 65 DEG C.
When the assembled arthitecutral structure number of plies is higher or component is larger, adopts Heat artificially maintenance very inconvenient, and be affected by human factors, heating-up temperature is difficult to control it and stablizes, once temperature decrease, grouting material very easily freezes in hardening process, affect strength developing, workmanship is difficult to ensure.
Summary of the invention
The object of the invention is for the grouting of fabricated construction reinforced bar sleeve connect the problems referred to above that winter construction exists a kind of easy construction is provided, not by depth of building and the restriction of component size, curing temperature stablizes, low temperature environment that environment temperature affects workmanship can be reduced to greatest extent under fabricated construction reinforced bar sleeve to be in the milk connection construction method.
For achieving the above object, fabricated construction reinforced bar sleeve grouting connection construction method under low temperature environment provided by the invention, comprises the following steps:
Step 1, prefabricated units
Assembling and the welding of connecting reinforcement, reinforcing cage stirrup and sleeve is completed by designing requirement, then will be wrapped in outside sleeve from the even consolidation of the warm heat tape of limit, and fix with fixed band, be less than sleeve from the winding scope up and down of the warm heat tape of limit, will insulation processing be carried out from the end of the warm heat tape of limit; Then build assembly concrete component, note when building to be embedded in concrete from the warm heat tape of limit, do not allow to expose from concrete, assembly concrete component is maintenance 24h at 50 DEG C of temperature;
Step 2, the prefabricated units of step 1 are carried out in-site installation, then at the surface coverage heat insulating material of assembly concrete component;
Step 3, will from limit warm heat tape be connected with power supply, then cast grouting material in electrified regulation 10 minutes backward sleeves, utilize and make the temperature of reinforced bar sleeve grouting material and assembly concrete component keep 45 ± 5 DEG C from the electric heating of the warm heat tape of limit, grouting material is maintenance 30min ~ 72h (the concrete time requires according to site operation and designing requirement is determined) sclerosis at this temperature, completes fabricated construction reinforced bar sleeve grouting connection construction under low temperature environment.
The invention has the beneficial effects as follows:
1, utilize from limitting warm heat tape to heat sleeve grouting, heating tape can be carried out temperature automatically controlled according to setting curing temperature, and make grouting material curing temperature keep 45 ± 5 DEG C, grouting material does not freeze, curing temperature is stablized, and can reduce the impact of low temperature environment on workmanship to greatest extent.
2, easy construction of the present invention, does not affect by building height and component size, can use in any job site.
3, be wrapped in outside sleeve from limit warm heat tape even consolidation, grouting material rapid temperature increases to 45 ± 5 DEG C in sleeve can be made, and guarantee grouting material homogeneous temperature in sleeve.
Accompanying drawing explanation
Fig. 1 is the fabricated construction reinforced bar sleeve grouting connected node longitudinal sectional view utilizing the inventive method to prepare;
Fig. 2 is the transverse sectional view along Fig. 1 middle sleeve position.
In figure: 1-connecting reinforcement, 2-reinforcing cage stirrup, 3-is from limitting warm heat tape, 4-sleeve, 5-assembly concrete component, 6-heat insulating material, 7-power supply.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
The present embodiment is the sleeve grouting experiment three groups being amounted to 9 beam column component nodes and carry out at Shenyang Building Univ.'s structure laboratory (test room's temperature is-14 DEG C), and experimental procedure is as follows:
Step 1, prefabricated units
Assembling and the welding of node connecting reinforcement 1, reinforcing cage stirrup 2 and sleeve 4 is completed by designing requirement, then at the winding DBR-J type warm heat tape 3 of limit certainly of the even consolidation in the outside of sleeve, sleeve is less than from the winding scope up and down of the warm heat tape of limit, carry out insulation processing from the end insulating tape of the warm heat tape of limit, will be fixed on reinforcing cage stirrup from the warm heat tape of limit with mackintosh; Then build assembly concrete component 5, note when building making to be embedded in concrete from the warm heat tape of limit, do not allow to expose from concrete, assembly concrete component is maintenance 24h at 50 DEG C of temperature;
Step 2, the position corresponding with sleeve on the surface of assembly concrete component cover the heat insulating material 6 be made up of cotton-wadded quilt;
Step 3, by from limit warm heat tape front end be connected with 220V AC power 7, then electrified regulation poured into a mould CGMJM-VIII type grouting material with grouting machine after 10 minutes in sleeve, utilize and make the temperature of sleeve grouting material and assembly concrete component keep 45 DEG C from the electric heating of the warm heat tape of limit, maintenance 24h, obtained beam column component node, completes fabricated construction reinforced bar sleeve grouting connection construction under low temperature environment.
Utilize nonmetal ultrasound measuring instrument and forcing press to detect the sleeve grouting material of tested 9 beam column component nodes and concrete component, its intensity all reaches construction technical requirement.
Claims (1)
1. a fabricated construction reinforced bar sleeve grouting connection construction method under low temperature environment, is characterized in that, comprise the following steps:
Step 1, prefabricated units
Assembling and the welding of connecting reinforcement, reinforcing cage stirrup and sleeve is completed by designing requirement, then will be wrapped in outside sleeve from the even consolidation of the warm heat tape of limit, and fix with fixed band, be less than sleeve from the winding scope up and down of the warm heat tape of limit, will insulation processing be carried out from the end of the warm heat tape of limit; Then build assembly concrete component, note when building to be embedded in concrete from the warm heat tape of limit, do not allow to expose from concrete, assembly concrete component is maintenance 24h at 50 DEG C of temperature;
Step 2, the prefabricated units of step 1 are carried out in-site installation, then at the surface coverage heat insulating material of assembly concrete component;
Step 3, will from limit warm heat tape be connected with power supply, then cast grouting material in electrified regulation 10 minutes backward sleeves, utilize and make the temperature of reinforced bar sleeve grouting material and assembly concrete component keep 45 ± 5 DEG C from the electric heating of the warm heat tape of limit, grouting material at this temperature maintenance 30min ~ 72h hardens, and completes fabricated construction reinforced bar sleeve grouting connection construction under low temperature environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207859.4A CN104790663A (en) | 2015-04-27 | 2015-04-27 | Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207859.4A CN104790663A (en) | 2015-04-27 | 2015-04-27 | Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104790663A true CN104790663A (en) | 2015-07-22 |
Family
ID=53555809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510207859.4A Pending CN104790663A (en) | 2015-04-27 | 2015-04-27 | Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104790663A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382738A (en) * | 2016-11-15 | 2017-02-08 | 北京住总集团有限责任公司 | Assembly type prefabricated vertical member sleeve electric tracing heating system and using method thereof |
| CN109914805A (en) * | 2019-03-28 | 2019-06-21 | 上海宝冶集团有限公司 | A kind of low temperature sleeve grout construction method |
| CN111648601A (en) * | 2020-06-11 | 2020-09-11 | 北京城乡建设集团有限责任公司 | Temperature control system for concrete structure winter grouting and construction method |
| CN113502920A (en) * | 2021-06-16 | 2021-10-15 | 江阴市先锋建筑有限责任公司 | Steel-concrete structure of prefabricated green house building |
| CN114876203A (en) * | 2022-06-01 | 2022-08-09 | 上海宝冶集团有限公司 | Low-temperature construction device and construction method for prefabricated building |
| CN115370176A (en) * | 2022-07-12 | 2022-11-22 | 中建二局第三建筑工程有限公司 | Original site reinforcement construction method in old protection building reconstruction process |
-
2015
- 2015-04-27 CN CN201510207859.4A patent/CN104790663A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382738A (en) * | 2016-11-15 | 2017-02-08 | 北京住总集团有限责任公司 | Assembly type prefabricated vertical member sleeve electric tracing heating system and using method thereof |
| CN109914805A (en) * | 2019-03-28 | 2019-06-21 | 上海宝冶集团有限公司 | A kind of low temperature sleeve grout construction method |
| CN111648601A (en) * | 2020-06-11 | 2020-09-11 | 北京城乡建设集团有限责任公司 | Temperature control system for concrete structure winter grouting and construction method |
| CN113502920A (en) * | 2021-06-16 | 2021-10-15 | 江阴市先锋建筑有限责任公司 | Steel-concrete structure of prefabricated green house building |
| CN114876203A (en) * | 2022-06-01 | 2022-08-09 | 上海宝冶集团有限公司 | Low-temperature construction device and construction method for prefabricated building |
| CN115370176A (en) * | 2022-07-12 | 2022-11-22 | 中建二局第三建筑工程有限公司 | Original site reinforcement construction method in old protection building reconstruction process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104790663A (en) | Fabricated structure reinforcing steel bar sleeve grouting connection construction method under low-temperature environment | |
| CN103422620B (en) | A kind of prefabricated hollow profile steel concrete column and splicing construction thereof and joining method | |
| CN105064555A (en) | Structural wallboard for superimposed decorative layer and insulating layer and construction method | |
| CN204826426U (en) | Grout sleeve for steel bar connection | |
| CN205710462U (en) | Magnetic-type electric blanket is used in a kind of concreting in cold weather heating | |
| WO2009011516A3 (en) | Form with reinforcing bars, non-support form system and non-support construction method using the same | |
| CN105064625A (en) | Grout sleeve for reinforcement connection and reinforcement connecting method | |
| CN103437439A (en) | Prefabricated steel wire net rack thermal insulation plate, manufacturing method of prefabricated steel wire net rack thermal insulation plate and construction method of prefabricated steel wire net rack thermal insulation plate | |
| CN104278794B (en) | Prefabricated thermal insulation composite wallboard of a kind of carrying space three-dimensional structure and preparation method thereof | |
| CN207846751U (en) | A kind of prefabricated assembled concrete shear wall outer insulated wall plate | |
| EP2637830A1 (en) | Controlled curing of concrete | |
| CN104790533B (en) | Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment | |
| CN105178503A (en) | Prefabricated external insulation wallboard | |
| CN110230361B (en) | Assembled enclosure cladding board for severe cold region and manufacturing method thereof | |
| CN209874148U (en) | Assembled aerogel foam concrete thermal insulation wallboard | |
| CN105714943B (en) | Exterior-wall heat insulation reinforcement composite plate, heat-preserving wall integral structure and construction method | |
| CN104563281B (en) | A kind of prefabricated balcony structure and its construction method | |
| CN106827207A (en) | A kind of simple concrete column curing means | |
| CN205894349U (en) | Horizontal seam of prefabricated sandwich thermal -insulation exterior wall | |
| CN207003807U (en) | Building energy conservation and the cast-in-place non-dismantling formwork of structure-integrated heat-insulation system | |
| CN206829427U (en) | A kind of two-chamber square bar restrains heat-preserving wall component | |
| CN204876210U (en) | Structure wallboard of coincide decorative layer and heat preservation | |
| CN105383068A (en) | Machining method for fastening sealing hoops made of FRP composite building material for prefabrication assembly system | |
| CN104847041A (en) | Manufacturing method of building heat insulation formwork with connecting elements | |
| CN106545145B (en) | Anchoring part assembly for fixing heat preservation plate anchor and heat preservation wall body thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150722 |
|
| WD01 | Invention patent application deemed withdrawn after publication |