CN109024973B - Connecting structure for prefabricated shear wall and construction method thereof - Google Patents
Connecting structure for prefabricated shear wall and construction method thereof Download PDFInfo
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- CN109024973B CN109024973B CN201810744847.9A CN201810744847A CN109024973B CN 109024973 B CN109024973 B CN 109024973B CN 201810744847 A CN201810744847 A CN 201810744847A CN 109024973 B CN109024973 B CN 109024973B
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- 238000010276 construction Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000004873 anchoring Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000011065 in-situ storage Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011376 self-consolidating concrete Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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Abstract
A connecting structure for a prefabricated shear wall comprises an L-shaped steel plate with studs, horizontal anchoring ribs and filling materials; the lower surface of the upper prefabricated shear wall is processed into a convex shape, and L-shaped steel plates are pre-embedded on two sides of the convex shape; one corner limb of the L-shaped steel plate is embedded in the upper prefabricated shear wall through a stud, vertical holes for longitudinal steel bars to pass through are formed in the L-shaped steel plate, and every two of the outward longitudinal steel bars form a closed annular rib I; vertical connecting steel bars are arranged on the upper surface of the lower prefabricated shear wall or foundation, and every two vertical connecting steel bars form a closed annular rib II; and filling materials are poured on the two sides of the convex type in-situ, the horizontal anchoring ribs horizontally penetrate through the filling materials in the closed annular rib I and the closed annular rib II and penetrate through the reserved horizontal holes at the convex type parts and the horizontal holes of the L-shaped steel plates, and bolts or anchorage devices are adopted for anchoring. The invention can effectively improve the working performance of the on-site pouring filling material and the connecting section of the prefabricated shear wall structure, and simultaneously improve the overall anti-seismic performance of the shear wall structure.
Description
Technical Field
The invention relates to a connecting structure for a prefabricated shear wall and a construction method thereof, which are particularly suitable for the connection construction of joints between the shear wall and a foundation and between the shear wall, and belong to the technical field of constructional engineering.
Background
The assembly type shear wall structure is widely applied to actual engineering construction by virtue of the advantages of small influence on environment and traffic, high construction speed, easily controlled component quality and the like. However, the existing shear wall joint connection technology restricts the application of the structure form to a deeper step, and the main problems are that the strength of the joint is not enough, and a weak joint generates larger stress and strain, so that cracks rapidly spread in the area to cause structural failure.
At present, the grouting sleeve connecting mode widely adopted is difficult to ensure and detect due to the difficulty in grouting quality, and the safety and reliability of the grouting sleeve connecting mode are questioned to a certain extent. When wet connection of the in-situ casting connecting seam is adopted, the in-situ casting concrete and the connecting interface and the corner in-situ casting concrete of the prefabricated shear wall structure are weak points of structural seismic resistance.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the connecting structure for the prefabricated shear wall and the construction method thereof, which can effectively improve the working performance of the connecting section of the cast-in-place concrete and the prefabricated shear wall structure and improve the overall anti-seismic performance of the shear wall structure.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a connecting structure for a prefabricated shear wall is arranged between an upper prefabricated shear wall and a lower prefabricated shear wall or a foundation to be connected, and comprises an L-shaped steel plate with studs, horizontal anchoring ribs and filling materials; the lower surface of the upper prefabricated shear wall is processed into a convex shape, a reserved horizontal hole for a horizontal anchoring rib to pass through is formed in the convex shape, and L-shaped steel plates are pre-embedded in the shear walls on two sides of the convex shape; one corner limb of the L-shaped steel plate is embedded in the upper prefabricated shear wall through a stud, a vertical hole for a longitudinal steel bar to pass through is formed in the corner limb, the extending length of the longitudinal steel bar passing through the vertical hole is slightly smaller than the height of the convex type, and every two extending longitudinal steel bars form a closed annular rib I; the other corner limb of the L-shaped steel plate bends downwards and has the same length as the height of the convex part, and a horizontal hole for the horizontal anchoring rib to pass through is arranged on the corner limb; the upper surface of the lower prefabricated shear wall or foundation is a horizontal rough surface with the roughness larger than 2mm, vertical connecting steel bars higher than the upper surface of the shear wall or foundation are arranged, the extending height of the vertical connecting steel bars is the same as the extending height of longitudinal steel bars of the upper prefabricated shear wall, every two vertical connecting steel bars form a closed annular rib II, the sectional area of the closed annular rib II is not smaller than that of the closed annular rib I, and a steel pipe is sleeved on the vertical part of the closed annular rib II; and filling materials are poured on the two sides of the convex type in-situ, the horizontal anchoring ribs horizontally penetrate through the filling materials in the closed annular rib I and the closed annular rib II after reaching certain compressive strength, penetrate through the reserved horizontal holes at the convex type parts and the horizontal holes of the L-shaped steel plate, and are anchored by bolts or anchors.
A construction method of a connecting structure for a prefabricated shear wall comprises the following steps: the method comprises the following specific steps: 1) manufacturing an upper prefabricated shear wall, a lower prefabricated shear wall or a foundation according to the requirement of the connection structure, and embedding an L-shaped steel plate in the upper prefabricated shear wall; 2) positioning the upper prefabricated shear wall above the lower prefabricated shear wall or foundation according to the design; 3) horizontally penetrating the horizontal anchoring rib through the horizontal hole of the L-shaped steel plate, the closed annular rib I, the closed annular rib II and the reserved horizontal hole at the convex part, and anchoring the horizontal anchoring rib on the L-shaped steel plate through a bolt or an anchorage device; 4) supporting templates at two sides of a cavity formed between the convex sides of the lower surface of the upper prefabricated shear wall and the upper surface of the lower prefabricated shear wall or the foundation, wherein the height of each template is higher than that of the cavity, and a pouring hole is reserved; 5) filling the cavity with filling materials through the pouring hole; 6) and anchoring the horizontal anchoring ribs after the filling material filled in the cavity reaches a certain compressive strength.
Compared with the prior art, the invention has the beneficial effects that:
1) the L-shaped steel plate with the studs is adopted, so that the L-shaped steel plate can be used as a template for manufacturing the prefabricated shear wall, and the construction period of removing the template is shortened; on the other hand, the bonding force of the prefabricated shear wall and the post-pouring filler connecting surface can be improved, the problem that the connecting surface of the traditional structure is cracked too early under the action of an earthquake is solved, and the structural integrity is improved.
2) According to the invention, the horizontal anchoring rib applies pretightening force, so that on one hand, the pin bolt locking force of the horizontal anchoring rib on the upper and lower closed annular ribs I and II is enhanced, and the problem of sharp reduction of the pin bolt locking force due to local concrete crushing in the traditional structure is solved; on the other hand, the horizontal anchoring ribs and the L-shaped steel plate jointly restrain the filling material by applying pretightening force, so that the bearing capacity and the deformation capacity of the filling material are improved, and the integral anti-seismic performance of the shear wall structure is improved.
3) According to the closed annular rib II with the steel pipe on the lower prefabricated shear wall or foundation, the problems of buckling deformation of the lower reinforcing steel bar under the action of repeated earthquake loads and early falling of a concrete protection layer caused by buckling deformation can be effectively solved, and the energy consumption capability of the shear wall can be obviously improved.
4) The connection structure has good anti-seismic performance, is convenient to construct, does not need special construction equipment, and is easy to guarantee and detect quality.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of an embodiment of a connection structure of an upper prefabricated shear wall and a foundation.
Fig. 2 is a structural schematic view of an embodiment of a connection structure of an upper prefabricated shear wall and a lower prefabricated shear wall.
Fig. 3 is a side view of the connection structure of fig. 1 and 2.
Fig. 4 is a schematic structural view of the L-shaped steel plate of fig. 3.
In the figure: 1. the prefabricated shear wall comprises an upper prefabricated shear wall body, 2 parts of a foundation, 3 parts of studs, 4 parts of an L-shaped steel plate, 5 parts of longitudinal reinforcing steel bars, 5-1 parts of closed annular reinforcing steel bars I and 6 parts of horizontal anchoring steel bars, 7 parts of vertical connecting reinforcing steel bars, 7-1 parts of closed annular reinforcing steel bars II and 8 parts of bolts or anchorage devices, 9 parts of filling materials, 10 parts of a lower prefabricated shear wall body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
Example 1:
fig. 1 shows an embodiment of a connection structure between an upper prefabricated shear wall 1 and a foundation 2, wherein the lower surface of the upper prefabricated shear wall 1 is convex, a reserved horizontal hole for a horizontal anchoring rib 6 to pass through is formed in the convex, L-shaped steel plates 4 shown in fig. 4 are embedded in the convex two-side shear walls on the lower surface of the upper prefabricated shear wall 1, one corner of each L-shaped steel plate 4 is connected with the upper prefabricated shear wall 1 through a stud 3, and a vertical hole for a longitudinal steel bar 5 of the shear wall to pass through is formed in each corner; the other corner of the L-shaped steel plate 4 bends downwards, has the same length as the convex height of the upper prefabricated shear wall 1, and is provided with a horizontal hole for the horizontal anchoring rib 6 to pass through. Longitudinal steel bars 5 in the shear walls on the two convex sides of the lower surface of the upper prefabricated shear wall 1 extend out through vertical holes of the L-shaped steel plates 4 to be flush with the lower surface of the upper prefabricated shear wall, and the longitudinal steel bars 5 in the thickness direction are processed into closed annular ribs I5-1 in pairs. The upper surface of the pre-connected foundation 2 is a horizontal rough surface with the roughness larger than 2mm, vertical connecting steel bars 7 higher than the upper surface are arranged, the vertical connecting steel bars 7 extending outwards form two pairs of closed annular bars II 7-1, the vertical part of each closed annular bar II 7-1 is also sleeved with a steel pipe, the diameter of each steel pipe is slightly larger than that of each steel bar, the extension height of each closed annular bar II 7-1 with the steel pipe is higher than that of the upper surface of the foundation 2, the extension height of each vertical connecting steel bar 7 is basically the same as that of the corresponding closed annular bar I5-1 of the upper prefabricated shear wall 1 to be connected, and the sectional area of each closed annular bar II 7-1 is not smaller than that of the corresponding closed annular bar I5-1 of the upper prefabricated shear wall 1 to be connected. The horizontal anchoring ribs 6 are steel strands which horizontally penetrate through the inner sides of the closed annular ribs I5-1 of the upper prefabricated shear wall 1 and the closed annular ribs II 7-1 with the steel pipes of the foundation 2 and the reserved horizontal holes in the convex part of the upper prefabricated shear wall 1 and are anchored by an anchorage device through the horizontal holes of the L-shaped steel plates 4, as shown in figure 3. And filling materials 9 are cast in situ on the convex two sides of the upper prefabricated shear wall 1, and the filling materials 9 are self-compacting concrete.
The construction method comprises the following steps:
1) manufacturing an upper prefabricated shear wall 1 and a foundation 2 according to the requirement of a connecting structure;
2) positioning the upper prefabricated shear wall 1 above the foundation 2 according to the design;
3) horizontally passing the horizontal anchoring rib 6 through a horizontal hole of the L-shaped steel plate 4, the closed annular rib I5-1, the closed annular rib II 7-1 with the steel pipe and a reserved horizontal hole at the convex part, and anchoring the horizontal anchoring rib on the L-shaped steel plate 4 through an anchorage device;
4) supporting templates at two sides of a cavity formed between the shear walls at the convex two sides of the lower surface of the upper prefabricated shear wall 1 and the foundation 2, wherein the height of each template is higher than that of the cavity, and a pouring hole is reserved;
5) filling the cavity with a filling material 9 through the pouring hole, wherein the filling material 9 is self-compacting concrete;
6) and after the filling material 9 filled in the cavity reaches a certain compressive strength, anchoring the horizontal anchoring ribs 6 by using an anchorage device.
Implementation 2:
fig. 2 shows an example of a connection structure of an upper prefabricated shear wall 1 and a lower prefabricated shear wall 10, which differs from the example in that the lower prefabricated shear wall 10 replaces the foundation 2 in the example 1, but the structure of the connection part of the lower prefabricated shear wall 10 and the upper prefabricated shear wall 1 is identical to that of the foundation 2. In addition, the horizontal anchoring bar 6 of the present embodiment is a steel bar with a thread at the end, and the filling material 9 is grouting material. The construction method was the same as in example 1.
The connection structure of the embodiment 1 and the embodiment 2 obtains the working performance and the anti-seismic performance parameters which are equal to or even superior to those of the integral cast-in-place structure through the early-stage low-cycle repeated load test, thereby proving the beneficial effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment according to the technical spirit of the present invention are included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a connection structure for prefabricated shear wall, sets up between upper portion prefabricated shear wall (1) and lower part prefabricated shear wall (10) or basis (2) that wait to connect, characterized by: the connecting structure comprises an L-shaped steel plate (4) with a stud (3), a horizontal anchoring rib (6) and a filling material (9);
the lower surface of the upper prefabricated shear wall (1) is processed into a convex shape, a reserved horizontal hole for a horizontal anchoring rib (6) to pass through is formed in the convex shape, and L-shaped steel plates (4) are embedded in the shear walls on two sides of the convex shape; one corner limb of the L-shaped steel plate (4) is pre-embedded on the upper prefabricated shear wall (1) through a stud (3), a vertical hole for a longitudinal steel bar (5) to pass through is formed in the corner limb, the extending length of the longitudinal steel bar (5) passing through the vertical hole is slightly smaller than the height of the convex type, and every two extending longitudinal steel bars (5) form a closed annular rib I (5-1); the other corner limb of the L-shaped steel plate (4) bends downwards and has the same length as the height of the convex part, and the corner limb is also provided with a horizontal hole for a horizontal anchoring rib (6) to pass through;
the upper surface of the lower prefabricated shear wall (10) or the foundation (2) is a horizontal rough surface with the roughness larger than 2mm, vertical connecting steel bars (7) higher than the upper surface are arranged, the extending height of the vertical connecting steel bars (7) is the same as the extending height of longitudinal steel bars (5) of the upper prefabricated shear wall (1), every two of the extending vertical connecting steel bars (7) form a closed annular rib II (7-1), the sectional area of the closed annular rib II (7-1) is not smaller than that of the closed annular rib I (5-1), and a steel pipe is sleeved on the vertical part of the closed annular rib II (7-1);
and filling materials (9) are poured on the two convex sides in situ, the horizontal anchoring ribs (6) horizontally penetrate through the filling materials (9) in the closed annular ribs I (5-1) and the closed annular ribs II (7-1), penetrate through the reserved horizontal holes in the convex parts and the horizontal holes of the L-shaped steel plates (4), and are anchored by bolts or anchors (8).
2. A connection structure for precast shear walls according to claim 1, wherein: the height of the convex is not less than 150 mm.
3. A connection structure for precast shear walls according to claim 1 or 2, wherein: the number of the reserved horizontal holes at the convex part is not less than 4.
4. A connection structure for precast shear walls according to claim 1, wherein: the horizontal anchoring ribs (6) are steel strands or steel bars with threads at the ends.
5. A connection structure for precast shear walls according to claim 1, wherein: the filling material (9) is self-compacting concrete.
6. A construction method of a connection structure for precast shear walls according to any one of claims 1 to 5, characterized by: the method comprises the following specific steps:
1) manufacturing an upper prefabricated shear wall (1), a lower prefabricated shear wall (10) or a foundation (2) according to the requirements of a connection structure, and embedding an L-shaped steel plate (4) on the upper prefabricated shear wall (1);
2) positioning the upper prefabricated shear wall (1) above the lower prefabricated shear wall (10) or the foundation (2) according to the design;
3) horizontally penetrating a horizontal anchoring rib (6) through a horizontal hole of the L-shaped steel plate (4), a closed annular rib I (5-1), a closed annular rib II (7-1) and a reserved horizontal hole at the convex part, and anchoring the horizontal anchoring rib (6) on the L-shaped steel plate (4) through a bolt or an anchorage device (8);
4) supporting templates at two sides of a cavity formed between the convex sides of the lower surface of the upper prefabricated shear wall (1) and the upper surface of the lower prefabricated shear wall (10) or the foundation (2), wherein the height of each template is higher than that of the cavity, and a pouring hole is reserved;
5) filling the cavity with a filling material (9) through the pouring hole;
6) and after the cavity is filled with the filling material (9), the horizontal anchoring rib (6) is anchored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744847.9A CN109024973B (en) | 2018-07-09 | 2018-07-09 | Connecting structure for prefabricated shear wall and construction method thereof |
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| CN201810744847.9A CN109024973B (en) | 2018-07-09 | 2018-07-09 | Connecting structure for prefabricated shear wall and construction method thereof |
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| CN109024973B true CN109024973B (en) | 2020-02-07 |
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| CN110513147B (en) * | 2019-07-01 | 2021-03-30 | 中国铁路设计集团有限公司 | Tunnel mid-board of middle disconnection |
| CN112854862A (en) * | 2021-03-04 | 2021-05-28 | 上海核工程研究设计院有限公司 | Steel plate concrete wall and reinforced concrete member node connection mode |
| CN115749039A (en) * | 2022-11-08 | 2023-03-07 | 中建八局第二建设有限公司 | Assembled dry-type connecting shear wall and construction method |
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| KR101171553B1 (en) * | 2010-08-24 | 2012-08-07 | 쌍용건설 주식회사 | Shear wall type vibration control apparatus |
| CN102433945B (en) * | 2011-08-30 | 2013-09-04 | 东南大学 | Vertical mixed connection structure and method of prefabricated internal wallboards for assembling shear wall structure |
| CN204001270U (en) * | 2014-07-24 | 2014-12-10 | 冠鲁建设股份有限公司 | A kind of reinforced concrete wall and masonry wall syndeton |
| AU2015100669A4 (en) * | 2014-09-24 | 2015-07-02 | Conrock Australia Pty Ltd | Hollow Wall |
| CN207048077U (en) * | 2017-07-24 | 2018-02-27 | 海南省建筑产业化股份有限公司 | A kind of fabricated shear wall connecting node |
| CN109736479B (en) * | 2019-01-28 | 2020-05-12 | 中南大学 | Assembly type shear wall joint structure and splicing method thereof |
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