CN105442727A - Compound type connection shear wall structure and assembling method thereof - Google Patents

Abstract

The invention discloses a composite connection shear wall structure and an assembly method thereof. It includes N pieces of shear wall components with the same structure, and every two shear wall components are connected by composite shear keys and key grooves to form a composite connected shear wall. Due to the interaction between the composite shear key and the keyway, the construction accuracy is improved, and the eccentric compression caused by inaccurate assembly is avoided; because the shear key on the lower shear wall member can bear the upper shear force when the next layer is assembled The weight of the wall components, so there is no need to wait for the floor concrete to reach strength after the floor is poured, and the upper wall can be assembled immediately, which can greatly shorten the assembly cycle of the floor; the shear keys of the lower shear wall components are embedded in the upper shear force In the keyway of the wall member, the shear key can bear the transverse shear force, strengthen the shear performance of the structure, and enhance the reliability of the structure.

Description

Composite connection shear wall structure and its assembly method

technical field

The invention relates to an assembled shear wall structure and an assembly method thereof, in particular to a compound connected shear wall structure and an assembly method thereof.

Background technique

Compared with the traditional cast-in-place concrete structure, the prefabricated concrete structure has many advantages such as good component quality, short construction period, less resource use, and less production waste. Its main feature is that the main structural components are prefabricated in the factory, and then the components are transported to the construction site by means of vehicle transportation, etc., and the components are assembled and connected by means of mechanical hoisting on site. A large number of construction site operations are replaced by centralized production in the factory.

Sleeve grouting technology is one of the common methods for connecting upper and lower shear walls in prefabricated concrete shear wall structures. During construction, insert the reserved steel bar at the top of the lower shear wall into the pre-buried butt joint sleeve in the upper shear wall, and then inject grouting material into the sleeve with a grouting machine. After the grouting material hardens, the steel bar and the sleeve are firmly connected together. The existing research results show that the flexural strength of the joints of shear wall members connected by sleeve grouting is basically the same as that of cast-in-place concrete joints, and its ductility and energy dissipation capacity are also relatively reliable. However, it is often difficult to achieve precise docking between the upper and lower walls connected by the traditional sleeve grouting construction technology, which can easily cause misalignment between the upper and lower shear walls, which not only adversely affects the appearance and waterproof performance of the building, but also The safety of the structure is affected by the eccentric compression of the shear wall. In addition, the existing relevant regulations stipulate that the floor slab must have a cast-in-situ layer, and the assembly of the upper shear wall with the existing construction technology must wait for the floor concrete to reach a certain strength before proceeding, which will slow down the construction progress.

Contents of the invention

The purpose of the present invention is to provide a compound connected shear wall structure and its assembly method, which solves the shortcomings of the traditional sleeve grouting connected shear wall, so as to improve the accuracy and convenience of the assembled shear wall construction.

In order to achieve the above object, the technical scheme adopted in the present invention is:

1. A compound connected shear wall structure

The invention includes N pieces of shear wall components with the same structure, and every two pieces of shear wall components are connected by composite shear keys and key grooves to form a compound connected shear wall.

1-2 rows of longitudinal steel bars are pre-embedded on both sides of the upper end of each shear wall member, and at least one composite shear key is arranged in the middle of the upper end. The shape of the embedded part of the shear key is a cuboid, the height is equal to the thickness of the laminated floor, and the width is smaller than the thickness of the shear wall, and there are multiple floors for the connection of the laminated floor reinforcement on both sides of the shear wall Reserved holes for steel bars; the shape of the embedded part of the shear key is a square truss, the size of the bottom surface of the four prism is the same as that of the embedded part of the shear key, and a row of longitudinal steel bars for grouting connection is pre-embedded on the top plane of the four prism; Both sides of the lower end of the shear wall member are provided with grouting sleeves, and at least one keyway is provided in the middle of the lower end. A grouting hole and a grouting hole for grouting, and a plurality of grouting holes and grouting holes for grouting are respectively connected with their respective grouting sleeves; the keyway is a concave quadrangular platform, and its shape and size are consistent with the grouting sleeve. The shear key embedding part is the same.

A U-shaped steel wire mesh for reinforcement is respectively arranged at the two sides of the wall body of the shear wall member close to the keyway.

Two, a kind of assembly method of compound connection shear wall structure, the steps of this method are as follows:

1) Floor hoisting and pouring:

After assembling the first shear wall component on the foundation, assemble the two prefabricated floor slabs on both sides of the wall respectively, erect and bind the upper steel bars of the two prefabricated floor slabs, and insert the floor slab reinforcement steel bars into the reserved holes of the floor slab steel bars. Then pour concrete to the upper and lower boundaries of the composite shear bond;

2) Assembly of the second shear wall member

After laying a layer of grouting material at the required joint as the sitting grout layer, hoist the second shear wall component above the first shear wall component so that all longitudinal reinforcement bars of the first shear wall component are inserted into the second The grouting sleeve at the corresponding position of the first shear wall component, and at the same time insert the shear key embedded part of the first shear wall component into the key groove of the second shear wall component.

3) Grout connection

Use pressure grouting to carry out pressure grouting in all the grouting holes on the side of the shear wall components. When the grouting material flows out of the respective grouting holes at the uppermost end, stop grouting and close all the grouting holes and grouting holes. The assembly of the first layer is completed after the grouting material has solidified and hardened;

Repeat steps 1-3 to assemble the required layers.

The beneficial effect that the present invention has compared with background technology is:

1. Due to the interaction between the composite shear key and the keyway, it can make the construction and assembly of the wall more convenient and accurate, reduce the assembly workload, improve the construction accuracy, and avoid the occurrence of eccentric pressure due to inaccurate assembly;

2. Because the shear key on the lower shear wall component can bear the weight of the upper shear wall component when the next layer is assembled, there is no need to wait for the floor concrete to reach strength after the floor is poured, and the upper layer of wall can be carried out immediately The assembly of the floor can greatly shorten the assembly cycle of the floor;

3. The shear key of the lower shear wall component is embedded in the keyway of the upper shear wall component. The shear key can bear the transverse shear force, strengthen the shear performance of the structure, and enhance the reliability of the structure.

Description of drawings

Fig. 1 is a perspective view of a shear wall member of the present invention.

Fig. 2 is a bottom view of Fig. 1 .

Figure 3 is a perspective view of two shear wall components after assembly (the laminated floor is not drawn).

Fig. 4 is a partial cross-sectional view along line A-A of Fig. 3 .

Fig. 5 is a perspective view of a shear wall member of the present invention.

Fig. 6 is a perspective view of the assembly of the shear wall member and the prefabricated part of the laminated floor according to the present invention.

Fig. 7 is a perspective view of the assembly of the shear wall member and the laminated floor slab of the present invention.

Fig. 8 is a perspective view of two shear wall members and prefabricated laminated floor slabs assembled in the present invention.

In the figure: 1. Shear wall component, 2. Longitudinal reinforcement, 3. Composite shear key, 4. Embedded part of shear key, 5. Embedded part of shear key, 6. Reserved hole for floor reinforcement, 7. Grouting Sleeve, 8, keyway, 9, grouting hole, 10, grouting hole, 11, steel wire mesh for reinforcement, 12, laminated floor slab, 13, prefabricated part of laminated floor slab, 14, upper reinforcement of floor slab, 15, floor slab reinforcement Steel bars, 16, the cast-in-place part of the laminated floor, 17, the slurry layer.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention includes N pieces of shear wall members 1 with the same structure, and every two shear wall members are connected by a composite shear key 3 and a keyway 8 to form a composite connection shear wall.

1-2 rows (2 rows in Fig. 1 and Fig. 3) of longitudinal steel bars 2 are pre-buried on both sides of the upper end of each shear wall member 1, and at least one composite shear key 3 is arranged in the middle of the upper end (Fig. 1-3). One composite shear key), the upper part of the composite shear key is the embedded part 4 of the shear key, and the lower part is the embedded part 5 of the shear key. The thickness is equal to the thickness of the shear wall, and the width is smaller than the thickness of the shear wall, and there are a plurality of reserved holes 6 for the reinforcement of the laminated floor 12 on both sides of the shear wall to connect the steel bars; the shape of the shear key embedded part 4 is a square platform , the size of the bottom surface of the four-sided platform is the same as that of the embedded part 5 of the shear key, and a row of longitudinal steel bars 2 for grouting connection is pre-embedded on the top plane of the four-sided platform; grouting sleeves 7 are arranged on both sides of the lower end of the shear wall member , at least one keyway is set in the middle of the lower end (there is one keyway in Figure 2), the pre-embedded position of the grouting sleeve 7 corresponds to the position of the pre-embedded longitudinal reinforcement 2 at the upper end of the shear wall member 1, and there are multiple The grouting hole 9 and the grouting hole 10 for grouting, a plurality of grouting holes 9 and the grouting hole 10 for grouting are communicated with the grouting sleeve 7 respectively; The shape and size are the same as the shear key embedded part 4.

As shown in Figure 4, considering that the keyway 8 is relatively weak on both sides of the wall, a U-shaped steel wire mesh 11 for reinforcement is respectively arranged on both sides of the keyway 8 close to the wall of the shear wall member 1 to prevent it from being transported. was destroyed during assembly.

As shown in Figures 5 to 8, the construction and assembly process of the shear wall of the present invention is as follows:

1) Hoisting and pouring of laminated slabs:

First, as shown in FIG. 5 , after the first shear wall component 1 is assembled, the hoisting and pouring of the prefabricated laminated floor 12 can be carried out. As shown in Figure 6, the prefabricated laminated floor slab prefabricated part 13 is hoisted and supported by a crane and placed on both sides of the shear wall member 1; the upper reinforcement 14 of the floor slab is erected and bound; Insert the floor reinforcement bars 15 into the holes 6, and effectively connect the floor reinforcement bars 15 with the upper reinforcement bars 14 of the floor; use pumped concrete to pour the cast-in-place part 16 of the laminated floor, and vibrate while pouring until the concrete surface reaches a composite level. Stop pouring when the boundary line between the shear key embedded part 4 and the shear key embedded part 5 of the shear key 3 is reached. As shown in Figure 7, only the upper shear key embedded part 4 of the composite shear key 3 of the first shear wall member 1 is exposed on the floor surface after the floor slab is poured.

2) Preparations before assembly of the second shear wall component:

Determine the hoisting sequence of the components, and stack the components to be assembled in order to facilitate on-site hoisting arrangements; check and clean the grouting sleeve 7 of the shear wall component 1 and its grouting hole 9 and grouting hole 10 to prevent debris from being To ensure the smooth progress of the subsequent grouting work; clean the joint surface between the laminated floor 12, the composite shear key 3 and the second shear wall member 1, and lay a layer of grouting material on the joint surface as the sitting grout layer 17 is used to bond two shear wall components;

3) Assembly of the second shear wall component:

Due to the action of the compound shear key 3, the second shear wall element 1 is supported by the compound shear key 3 of the first shear wall element 1 during assembly, and there is no need to wait for the floor concrete to reach strength before performing the second shear force The assembly of wall components can greatly shorten the construction period. During assembly, hoist the second shear wall component above the predetermined position of the first shear wall with a crane, and then lower the position of the component so that the longitudinal reinforcement 2 of the first shear wall can be inserted into the second shear wall grouting sleeve 7, and insert the shear key embedded part 4 of the first shear wall component 1 exposed above the laminated floor 12 into the key groove 8 of the second shear wall component 1. Because the four sides around the keyway 8 and the shear key embedded part 4 are inclined planes and the shapes match each other, the second shear wall member 1 will rely on the interaction between the keyway 8 and the shear key embedded part 4 under its own weight. It automatically and accurately falls to the predetermined plane position without manual adjustment; after that, it is only necessary to check and adjust the verticality of the second shear wall;

4) Grouting connection:

After the second shear wall component 1 is installed, it is connected by grouting, so that the two shear wall components 1 are connected into a whole. The grouting sleeve 7 is pressure grouted by means of pressure grouting. In order to ensure that the grouting material fills the entire grouting sleeve 7 densely, the grouting material is injected into the grouting sleeve 7 from the grouting hole 9 until the grouting hole 10 After the grouting material flows out, the grouting hole and the grouting hole can be closed; after the grouting material is solidified and hardened, the upper and lower shear walls are connected into a whole. The completed shear wall is shown in Figure 8.

Repeat steps 1-4 to assemble the required layers.

Claims (4)

1. a combined type connects shear wall structure, it is characterized in that: comprise the shear wall component (1) that N block structure is identical, be connected with keyway (8) by compound shear key (3) between every two blocks of shear wall components, form combined type and connect shear wall.

2. a kind of combined type according to claim 1 connects shear wall structure, it is characterized in that: described every block shear wall component (1) both sides, upper end are all embedded with 1-2 and arrange longitudinal reinforcement, in the middle of upper end, a compound shear key (3) is at least set, compound shear key top is shear key embedded part (4), bottom is shear key inlet part (5), the shape of shear key inlet part (5) is cuboid, height is equal with the thickness of laminated floor slab (12), width is less than the thickness of shear wall, and be provided with the floor bar preformed hole (6) of multiple laminated floor slab (12) bar connecting for shear wall both sides, the shape of shear key embedded part (4) is truncated rectangular pyramids, and the bed-plate dimension of truncated rectangular pyramids is identical with shear key inlet part (5), and the pre-buried row of top planes of truncated rectangular pyramids is for the longitudinal reinforcement connected that is in the milk, shear wall component (1) both sides, lower end are equipped with grout sleeve (7), in the middle of lower end, a keyway (8) is at least set, the position of the longitudinal reinforcement that the pre-buried position of grout sleeve (7) is pre-buried with shear wall component (1) upper end is corresponding, and multiple injected hole (9) for grouting and slurry outlet (10) is provided with in side, multiple injected hole (9) for grouting is communicated with respective grout sleeve (7) respectively with slurry outlet (10), keyway (8) is recessed truncated rectangular pyramids, and its shape and size are all identical with shear key embedded part (5).

3. a kind of combined type according to claim 1 connects shear wall structure, it is characterized in that: described keyway (8) arranges the gauze wire cloth (11) of U-shaped reinforcing together respectively near shear wall component (1) body of wall both sides place.

4. connect the assembly method of shear wall structure for a kind of combined type according to claim 1, it is characterized in that, the step of the method is as follows:

1) floor lifts and builds:

After ground assembles first piece of shear wall component (1) lower wall body, two blocks of precast floor slabs are assembled to body of wall both sides respectively, erection is colligation two pieces of precast floor slab top reinforcementes also, and insert floor reinforced steel (15) in floor bar preformed hole (6), then concreting is to the place of line of demarcation up and down of compound shear key (3);

2) assembling of second block of shear wall component

Needs junction lay one deck grouting material as seat pulp layer (17) after, second piece of shear wall component (1) is lifted into first piece of shear wall component (1) top, all longitudinal reinforcements (2) of first piece of shear wall component (1) are inserted in the grout sleeve (7) of second piece of shear wall component (1) correspondence position, make the shear key embedded part (5) of first piece of shear wall component (1) insert among the keyway (8) of second piece of shear wall component (1) simultaneously;

3) grouting connects

The mode of slip casing by pressure is adopted to carry out slip casing by pressure in all injected hole (9) in shear wall component (1) side, namely slip casting is stopped after grouting material flows out the respective slurry outlet (10) in the top, close all injected holes (9) and slurry outlet (10), after grouting material setting and harden, namely complete the assembling of first floor;

Repeat step 1-3, the number of plies of needs can be assembled.