CN110777946A - Prefabricated assembled concrete structure mosaic structure - Google Patents
Prefabricated assembled concrete structure mosaic structure Download PDFInfo
- Publication number
- CN110777946A CN110777946A CN201910934471.2A CN201910934471A CN110777946A CN 110777946 A CN110777946 A CN 110777946A CN 201910934471 A CN201910934471 A CN 201910934471A CN 110777946 A CN110777946 A CN 110777946A
- Authority
- CN
- China
- Prior art keywords
- epoxy resin
- splicing
- sleeve
- resin mortar
- steel bar
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 107
- 239000010959 steel Substances 0.000 claims abstract description 107
- 239000003822 epoxy resin Substances 0.000 claims abstract description 44
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 44
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005536 corrosion prevention Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 2
- 238000009435 building construction Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B2001/4192—Connecting devices specially adapted for embedding in concrete or masonry attached to concrete reinforcing elements, e.g. rods or wires
Abstract
The invention discloses a prefabricated concrete structure splicing structure, wherein an upper stressed steel bar is pre-embedded in an upper prefabricated component, a lower stressed steel bar and a steel sleeve are welded together and pre-embedded in a lower prefabricated component, epoxy resin mortar is poured into the steel sleeve, the upper prefabricated component and the lower prefabricated component are pre-poured with the epoxy resin mortar through splicing seams during splicing, the upper stressed steel bar and the lower stressed steel bar are connected into a whole, and the epoxy resin overflowing during connection flows into the splicing seams to form an epoxy resin mortar structure splicing layer, so that the integral splicing strength can be increased, and the steel bar corrosion prevention effect is achieved. The method is simple to operate, greatly improves the construction efficiency, reduces the construction process, shortens the construction period, easily ensures the filling quality of the epoxy resin mortar, greatly reduces the construction cost and difficulty on the premise of ensuring the safety of structural connection, meets the requirement of green building construction, and is worthy of popularization.
Description
Technical Field
The invention relates to the field of buildings, in particular to a prefabricated concrete structure splicing structure which can be widely applied to prefabricated concrete structures.
Background
The steel bar connection technology is a key technology of a prefabricated concrete structure, and the steel bars of the prefabricated components of the prefabricated concrete structure mainly have the technical means of sleeve grouting connection, slurry anchor connection, mechanical connection and the like at present. The traditional sleeve grouting connection usually has special requirements on the structure of a prefabricated sleeve component, the processing technology is complex, and the construction difficulty and the engineering cost are greatly increased; the traditional slurry anchor connection has higher construction requirements, and the problems of slurry leakage, secondary grouting, poor slurry fluidity, non-compact grouting and the like often occur; mechanical connection has higher requirement to the attach fitting, needs to divide into multiple grade according to the joint ductility to adapt to multiple reinforcing bar intensity, satisfy the joint strength requirement, need invest too big cost. The connection mode has the advantages of higher cost, high construction difficulty and long construction period.
Disclosure of Invention
The invention aims to overcome the technical defect of steel bar connection in the existing assembly type frame and shear wall structure, and provides the connection structure for splicing the assembly type structure, which has the advantages of simple construction, high connection strength, effectively reduced construction difficulty and reduced manufacturing cost.
The technical scheme adopted by the invention for solving the problems is as follows: a prefabricated concrete structure splicing structure comprises an upper prefabricated component, a lower prefabricated component, an upper stressed steel bar, a lower stressed steel bar, a steel sleeve, a coaxial epoxy resin mortar structure sleeve embedded in the steel sleeve and formed by pre-pouring epoxy resin mortar during splicing, and an epoxy resin mortar structure splicing layer; the steel sleeve and the lower stressed steel bar are welded together along the axial direction of the steel sleeve and are embedded in the lower prefabricated part, and the upper end surface of the steel sleeve is flush with the splicing surface of the lower prefabricated part; the epoxy resin mortar structure splicing layer is arranged at the splicing position of the upper prefabricated part and the lower prefabricated part and is connected with the epoxy resin mortar structure sleeve into a whole; the upper stressed steel bar is embedded in the upper prefabricated component, and the position of the upper stressed steel bar corresponds to that of the steel sleeve, namely the upper stressed steel bar penetrates through the splicing layer of the epoxy resin mortar structure and is embedded into the epoxy resin mortar structure sleeve; the steel sleeve is a common seamless steel pipe or a straight welded pipe.
Preferably, the minimum height of the steel sleeve is recorded as h, and the calculation formula is as follows:
wherein D is the diameter of the upper stressed steel bar, f
xThe tensile strength of the upper stressed steel bar is shown, and the tau is the shear strength of the epoxy resin mortar.
Preferably, the wall thickness of the steel sleeve is 2-3mm, and the inner diameter of the steel sleeve is 1.1-1.2 times of the diameter of the upper stressed steel bar.
Preferably, the upper stressed steel bar and the lower stressed steel bar are both ribbed steel bars with the diameter larger than 14 mm.
Preferably, fusion welding is adopted for welding the steel sleeve and the lower stressed steel bar, and the length of a welding seam is equal to the minimum height h of the steel sleeve. .
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the traditional sleeve grouting connection, the sleeve adopts a common seamless steel pipe or a straight seam steel pipe, a special thread structure is not needed, and the production process is simple and economical;
2. compared with the traditional slurry anchor connection, the structure does not need to reserve a grouting hole and a slurry outlet hole, and the epoxy resin mortar has higher fluidity, thereby greatly improving the construction efficiency;
3. when the lower stressed steel bar is inserted into the steel sleeve, the overflowed epoxy resin automatically fills the abutted seams between the structures, and the epoxy resin effectively plays the effects of strengthening connection, isolating air and preventing the steel bar from being corroded after being cured.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is an enlarged view of the inventive connecting device.
Wherein: 1. an upper prefabricated structure; 2. a lower prefabricated structure; 3. upper stressed steel bars; 4. a lower stressed steel bar; 5. an epoxy resin mortar structure splicing layer; 6. an epoxy resin mortar structural sleeve; 7. steel sleeve, 8, welding seam.
The specific implementation mode is as follows:
the invention is described in further detail below with reference to the figures and the detailed description.
Referring to fig. 1, the prefabricated concrete structure splicing structure of the invention comprises an upper prefabricated part 1, a lower prefabricated part 2, an upper stressed steel bar 3, a lower stressed steel bar 4, a steel sleeve 7, a coaxial epoxy resin mortar structure sleeve 6 embedded in the steel sleeve 7 and formed by pre-pouring epoxy resin mortar during splicing, and an epoxy resin mortar structure splicing layer 5. The steel sleeve 7 is a common seamless steel pipe or a straight seam welded pipe.
The steel sleeve 7 and the lower stressed steel bar 4 are welded together along the axial direction of the steel sleeve 7 and are embedded in the lower prefabricated part 2, and the upper end face of the steel sleeve 7 is flush with the splicing face of the lower prefabricated part 2. In the embodiment, fusion welding is adopted for welding the steel sleeve 7 and the lower stressed steel bar 4, and the length of the welding seam 8 is equal to the minimum height h of the steel sleeve 7.
The epoxy resin mortar structure splicing layer 5 is arranged at the splicing position of the upper prefabricated part 1 and the lower prefabricated part 2 and is connected with the epoxy resin mortar structure sleeve 6 into a whole. The upper stressed steel bar 3 is embedded in the upper prefabricated part 1, the position of the upper stressed steel bar 3 corresponds to that of the steel sleeve 7, and the upper stressed steel bar 3 penetrates through the epoxy resin mortar structure splicing layer 5 and is embedded into the epoxy resin mortar structure sleeve 6. In the present example, the epoxy resin mortar is an EP21 type epoxy resin mortar or an E44 type epoxy resin mortar.
In this embodiment, the depth of the upper stressed steel bar 3 and the lower stressed steel bar 4 embedded in the upper prefabricated part 1 and the lower prefabricated part is respectively equal to the height of the upper prefabricated part 1 and the lower prefabricated part, that is, the two steel bars are embedded in the two prefabricated parts.
In this embodiment, the minimum height of the steel sleeve 7 is denoted by h, and the calculation formula is as follows:
wherein D is the diameter of the upper stressed steel bar 3, f
xThe tensile strength of the upper stressed steel bar 3 is shown, and the tau is the shear strength of the epoxy resin mortar. The length of the upper stressed steel bar 3 inserted into the steel sleeve 7 is equal to the minimum height h of the steel sleeve 7.
In the embodiment, the wall thickness of the steel sleeve 7 is 2-3mm, the inner diameter of the steel sleeve is 1.1-1.2 times of the diameter of the upper stressed steel bar 3, and the upper stressed steel bar 3 and the lower stressed steel bar 4 are both ribbed steel bars with the diameter larger than 14 mm. Figure 2 shows an enlarged detail of the connection device according to the invention.
In this embodiment, when the upper prefabricated part 1 and the lower prefabricated part 2 are not spliced, the upper end of the steel sleeve 7 is provided with a plug to prevent concrete and other materials from entering the steel sleeve. When the upper prefabricated component 1 and the lower prefabricated component 2 are spliced, the plug is taken down, epoxy resin mortar is poured into the steel sleeve 7 through a splicing seam at the splicing position of the two components, the epoxy resin mortar forms an epoxy resin mortar structural sleeve 6 in the steel sleeve 7, and the upper stress steel bar and the lower stress steel bar are connected into a whole through the epoxy resin mortar. In addition, the epoxy resin mortar overflowing during pre-pouring flows into the abutted seams of the connecting surfaces of the two components to form the epoxy resin mortar structure splicing layer 5, so that the overall splicing strength can be increased, and the steel bar corrosion prevention effect is achieved.
Claims (5)
1. A prefabricated concrete structure splicing structure comprises an upper prefabricated component (1), a lower prefabricated component (2), an upper stressed steel bar (3), a lower stressed steel bar (4), a steel sleeve (7), a coaxial epoxy resin mortar structure sleeve (6) embedded in the steel sleeve (7) and an epoxy resin mortar structure splicing layer (5), wherein the coaxial epoxy resin mortar structure sleeve is formed by pre-pouring epoxy resin mortar during splicing; the steel sleeve (7) and the lower stressed steel bar (4) are welded together along the axial direction of the steel sleeve (7) and are embedded in the lower prefabricated part (2), and the upper end surface of the steel sleeve (7) is flush with the splicing surface of the lower prefabricated part (2); the epoxy resin mortar structure splicing layer (5) is arranged at the splicing position of the upper prefabricated part (1) and the lower prefabricated part (2) and is connected with the epoxy resin mortar structure sleeve (6) into a whole; the upper stressed steel bar (3) is embedded in the upper prefabricated part (1) and corresponds to the steel sleeve (7) in position, namely the upper stressed steel bar (3) penetrates through the epoxy resin mortar structure splicing layer (5) and is embedded into the epoxy resin mortar structure sleeve (6); the steel sleeve (7) is a common seamless steel pipe or a straight seam welded pipe.
2. The splicing structure of a prefabricated concrete structure according to claim 1, wherein the minimum height of the steel sleeve (7) is recorded as h, and the calculation formula is as follows:
wherein D is the diameter of the upper stressed steel bar (3), f
xThe tensile strength of the upper stressed steel bar (3) is shown, and the tau is the shear strength of the epoxy resin mortar.
3. The splicing structure of a prefabricated concrete structure according to claim 1, wherein the wall thickness of the steel sleeve (7) is 2-3mm, and the inner diameter thereof is 1.1-1.2 times of the diameter of the upper stressed steel bar (3).
4. The splicing structure of a prefabricated concrete structure according to claim 1, wherein the upper load-bearing steel bars (3) and the lower load-bearing steel bars (4) are ribbed steel bars having a diameter of more than 14 mm.
5. The splicing structure of a prefabricated concrete structure according to claim 1, wherein the steel sleeve (7) and the lower stressed steel bars (4) are welded by fusion welding, and the length of the welding seam (8) is equal to the minimum height h of the steel sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934471.2A CN110777946A (en) | 2019-09-29 | 2019-09-29 | Prefabricated assembled concrete structure mosaic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934471.2A CN110777946A (en) | 2019-09-29 | 2019-09-29 | Prefabricated assembled concrete structure mosaic structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110777946A true CN110777946A (en) | 2020-02-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910934471.2A Pending CN110777946A (en) | 2019-09-29 | 2019-09-29 | Prefabricated assembled concrete structure mosaic structure |
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| Country | Link |
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| CN (1) | CN110777946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781888A (en) * | 2022-11-24 | 2023-03-14 | 武汉美邻雅居建筑工程有限公司 | Splicing structure and construction method of concrete prefabricated part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100031607A1 (en) * | 2008-08-11 | 2010-02-11 | Oliva Michael G | Splice System for Fiber-Reinforced Polymer Rebars |
| CN103132546A (en) * | 2013-03-14 | 2013-06-05 | 张德涛 | Precast concrete component butting structure and butting method thereof |
| CN203701436U (en) * | 2014-01-23 | 2014-07-09 | 河北联合大学 | Lap joint structure of vertical reinforcements and steel sleeve of assembled wall |
| CN206829417U (en) * | 2017-06-08 | 2018-01-02 | 陕西建筑产业投资集团有限公司 | Anchor formula connecting structure under a kind of precast shear wall vertical reinforcement bellows |
| CN110238963A (en) * | 2019-06-13 | 2019-09-17 | 天津城建大学 | Double-tube type steel bar connecting structure and its construction method between precast concrete |
-
2019
- 2019-09-29 CN CN201910934471.2A patent/CN110777946A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100031607A1 (en) * | 2008-08-11 | 2010-02-11 | Oliva Michael G | Splice System for Fiber-Reinforced Polymer Rebars |
| CN103132546A (en) * | 2013-03-14 | 2013-06-05 | 张德涛 | Precast concrete component butting structure and butting method thereof |
| CN203701436U (en) * | 2014-01-23 | 2014-07-09 | 河北联合大学 | Lap joint structure of vertical reinforcements and steel sleeve of assembled wall |
| CN206829417U (en) * | 2017-06-08 | 2018-01-02 | 陕西建筑产业投资集团有限公司 | Anchor formula connecting structure under a kind of precast shear wall vertical reinforcement bellows |
| CN110238963A (en) * | 2019-06-13 | 2019-09-17 | 天津城建大学 | Double-tube type steel bar connecting structure and its construction method between precast concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781888A (en) * | 2022-11-24 | 2023-03-14 | 武汉美邻雅居建筑工程有限公司 | Splicing structure and construction method of concrete prefabricated part |
| CN115781888B (en) * | 2022-11-24 | 2024-02-20 | 黄骅市华悦商砼有限公司 | Splicing structure of concrete prefabricated parts and construction method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200211 |
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