CN108978938B - Prefabricated reinforced concrete shear wall and construction method - Google Patents

Abstract

A prefabricated reinforced concrete shear wall and a construction method. The shear wall consists of a wallboard, a bracket, a sleeve, a dowel, a steel plate and an anchor bolt; the bracket is located the side of wallboard, and the sleeve is pre-buried on the upper portion of wallboard, and the sleeve pipe is pre-buried in the side of wallboard, and dowel bar and steel sheet stretch out from the bottom surface of wallboard, and the crab-bolt is pre-buried on two sides of wallboard. The sleeve comprises outer tube, preforming and bolt, and sleeve upper portion is extrusion connection with the joint bar, and the sleeve lower part is threaded sleeve pipe with the joint bar and is connected. During construction, downward pressure is applied through the support, so that the two walls are in close contact, the bolt on the sleeve is screwed down, the dowel is clamped, and extrusion connection is realized. The invention can solve the stress and construction problems of the prefabricated reinforced concrete shear wall, the node area has good stress performance and earthquake resistance, the vertical steel bars are firmly connected, and the construction is easy.

Description

Prefabricated reinforced concrete shear wall and construction method

technical field

The invention relates to the field of prefabricated shear walls in fabricated reinforced concrete structures.

Background technique

At present, prefabricated structures are widely used. As an important component of high-rise buildings, the prefabrication level of shear walls affects the prefabrication level of the entire structure. The existing prefabricated reinforced concrete shear walls have certain problems in structure, stress and construction. The reinforced concrete shear wall is generally prefabricated by floor, that is, the wall between the upper and lower floors is prefabricated as a unit, and the prefabricated components are split at the junction of the floor and the shear wall. Therefore, the quality of the joints is difficult to guarantee. The seismic resistance of the structure is disadvantageous. The vertical connection between the two prefabricated shear walls mainly depends on the grouting material, and the vertical steel bars are not well connected, which affects their tensile performance. The on-site construction of prefabricated reinforced concrete shear walls is relatively difficult. There are many vertical steel bars in the shear wall. Due to manufacturing errors, transportation deformation, vibration displacement and other reasons, the vertical steel bars will have a certain dislocation, and it is not easy to insert into the connection. Inside the sleeve, construction is more difficult. Therefore, a new type of prefabricated reinforced concrete shear wall and its corresponding construction method are needed to ensure the mechanical properties and construction performance of the prefabricated reinforced concrete shear wall.

SUMMARY OF THE INVENTION

In order to solve the problems of force bearing and connection of prefabricated reinforced concrete shear walls, the present invention discloses a prefabricated reinforced concrete shear wall and a construction method. The prefabricated reinforced concrete shear walls have the advantages of reliable force transmission, firm connection, convenient construction, The construction method has the advantages of good seismic performance and the like, and the construction method enables the two shear walls to be well connected vertically and ensures the reliable connection of vertical steel bars.

The technical scheme of the prefabricated reinforced concrete shear wall of the present invention is: it is composed of a wall panel, a corbel, a sleeve, a casing, a reinforcing bar, a steel plate and an anchor bolt; the corbel is located on the side of the wall panel, and the top surface of the corbel is away from the wall The top surface of the board is not less than 600 mm; the sleeve is pre-buried in the upper part of the wall board, the top surface of the sleeve is 10 mm away from the top surface of the wall board, the upper part of the sleeve is the horn hole of the wall board, and the sleeve is two rows; the sleeve is pre-buried On the side of the wall panel, the bushing and the corbel are on the same side of the wall panel, the position of the bushing is higher than that of the corbel, and the distance from the top surface of the corbel to the center of the bushing is determined according to the thickness of the floor, not less than 100 mm. The pipes are in one row; the insert bars protrude from the bottom surface of the wall panel, and the extension length is not less than 200 mm, the insert bars are in two rows, the upper part of the insert bars is connected with the sleeve, and the connection method is screw connection; the steel plate extends from the bottom surface of the wall panel. Out, the steel plate is located between the two rows of insertion bars, and the extension length of the steel plate is less than the extension length of the insertion reinforcement; the anchor bolts are pre-buried on the two sides of the wall plate, and there are two sets of anchor bolts, one above the corbel. , a group is under the corbel, there are a total of 16 anchor bolts on both sides. There are two rows of horn holes on the top of the wall panel. The upper mouth of the horn hole is large and the lower mouth is small. The diameter of the lower mouth of the horn hole is the same as the inner diameter of the sleeve. The lower part of the horn hole is the sleeve, and the height of the horn hole is 10 mm; There is a socket on the top of the plate, the socket is located between the two rows of horn holes, the position of the socket corresponds to the position of the steel plate, and the depth of the socket is 5 mm larger than the protruding length of the steel plate; the grouting groove is located at On the two sides of the wallboard, the position of the grouting groove corresponds to the position of the sleeve, and one side of the sleeve is connected with the grouting groove. The sleeve is composed of an outer tube, a pressing piece and a bolt; the section of the pressing piece is crescent-shaped, and the pressing piece is located inside the outer tube. , there are multiple concave holes and a grouting eye on the pressing sheet, the concave holes and the grouting eye are round, the concave hole does not penetrate the pressing sheet, the grouting eye penetrates the pressing sheet, and there are threads in the grouting eye; the upper part of the outer tube is not Regular shape, there are multiple bolt holes and a grouting hole on it, both the bolt holes and the grouting hole are round, there are threads in the bolt holes, no threads in the grouting holes, the lower part of the outer pipe is a round pipe, and there are threads in the round pipe. It is used to connect the inserted reinforcement in the shear wall of this piece; the position of the bolt hole of the outer tube corresponds to the position of the concave hole of the tablet, forming a circular channel, and the position of the grouting hole of the outer tube corresponds to the position of the grouting hole of the tablet, forming a Circular channel; permanent anchors are bolted in the bolt holes of the outer tube, and temporary bolts are bolted in the grouting holes of the tablet. The inside of the casing is threaded, and the reinforcement is screwed in to form a threaded casing connection for connecting the upper reinforcement of the floor.

The prefabricated reinforced concrete shear wall of the present invention is not split at the joint area between the floor slab and the shear wall, but is split at a position higher than the floor slab, the shear wall is not disconnected in the node area, and the prefabricated reinforced concrete floor slab is supported on the corbel. The upper reinforcement of the cast-in-place floor slab is anchored to the casing of the shear wall through threads, so the mechanical properties of the joint area are better. The prefabricated reinforced concrete shear wall of the invention is suitable for the outer wall of the building, and the reinforced concrete inner wall is split at the floor position, so that the shear wall of the whole building is not broken at the same height, so that defects can be avoided at the same height, and it can be Connect each floor as a whole.

The vertical steel bars of the prefabricated reinforced concrete shear wall of the present invention are connected by sleeves. In this shear wall, one end of the rib is screwed into the lower part of the sleeve to form a threaded casing connection, and the other end extends out of the wallboard; between the two shear walls, the rib of the upper shear wall is inserted into the lower part. In the sleeve of the shear wall, tighten the bolts of the sleeve, push the tablet to squeeze the insert, and produce a certain plastic deformation, jam the insert to form an extrusion connection, and the connection of the vertical steel is more reliable; The grouting holes and grouting holes on the sleeve press the fluid grouting material into the sleeve, which plays the role of bonding and anchoring, and protects the rib and the sleeve from corrosion. The grouting material has fluidity, and can use cement slurry, polymer cement slurry, adhesive for planting bars, etc. When making a reinforced concrete shear wall, tighten the bolts at the grouting eye of the tablet, and fix the tablet on the outer pipe. When the two shear walls are connected, unscrew the bolt at the grouting eye of the tablet, loosen the tablet, and tighten it. The bolts at the bolt holes of the outer pipe make the pressing piece clamp the inserting bar of the upper shear wall. Bolting and grouting are all done in the grouting tank.

In the prefabricated reinforced concrete shear wall of the invention, a steel plate protrudes from the bottom of the wall plate to bear the shear force and improve the shear resistance capacity of the joint. There are horn holes on the top of the wall panel, which can overcome the influence of the position deviation of the inserting bars, and make the inserting bars easier to insert into the sleeve, which is convenient for construction.

The construction method of the prefabricated reinforced concrete shear wall of the present invention is as follows: pouring fluid grout into the socket of the lower shear wall; aligning the positions of the upper shear wall and the lower shear wall, Insert the rib of the upper shear wall into the sleeve of the lower shear wall, and at the same time insert the steel plate of the upper shear wall into the socket of the lower shear wall, and fix the connector at the supporting end in On the lower anchor bolt of the upper shear wall, the other end of the support is fixed on the upper anchor bolt of the lower shear wall, and supports are installed on both sides of the wall, and the length of the two supports is adjusted at the same time. Apply downward pressure on the upper shear wall, so that the bottom surface of the upper shear wall is in close contact with the top surface of the lower shear wall; unscrew the bolts at the grouting hole on the sleeve of the lower shear wall , loosen the pressing piece, and tighten the bolts on the bolt holes of the sleeve, so that the pressing piece is stuck on the inserting bar of the upper shear wall; loosen the connecting joint of the lower part of the support on one side of the corbel, adjust the length of the support, and put the lower part of the support The connector is fixed on the floor; insert a grouting pipe into the grouting hole of the lower shear wall sleeve, and pressurize the grouting material with fluidity. After the grouting material solidifies, use mortar to seal the grouting groove of the lower shear wall. .

The prefabricated reinforced concrete shear wall of the present invention is not at the joint area between the shear wall and the floor slab, the joint area has good integrity, mechanical performance and seismic performance, and is easy to construct; the top of the shear wall is provided with a horn hole, It can overcome the influence of a certain position deviation of the inserting bar, making the inserting bar easier to insert into the sleeve, which is convenient for construction; the vertical steel bar of the shear wall is connected by the sleeve, the lower end of the sleeve is threaded connection, the upper end is squeezed connection, vertical The connection effect to the steel bar is good, and the force transmission performance is good. The construction method enables two shear walls to be well butted vertically, and ensures reliable connection of vertical steel bars. The invention can solve the stress and construction problems of the prefabricated reinforced concrete shear wall, has good stress performance and seismic performance in the node area, firm vertical steel bar connection, easy construction, and has certain economic and social benefits.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings.

FIG. 1 is a front axonometric view of a prefabricated shear wall of the present invention.

Fig. 2 is a rear axonometric view of the prefabricated shear wall of the present invention.

3 is a partial enlarged view of the top surface of the wall panel of the prefabricated shear wall of the present invention.

Figure 4 is a detailed view of the sleeve of the prefabricated shear wall of the present invention.

Fig. 5 is a detailed view of the pressed sheet of the prefabricated shear wall of the present invention.

Fig. 6 is the connection diagram of the insert bar and the sleeve of the prefabricated shear wall of the present invention.

Fig. 7 is a construction process diagram of the prefabricated shear wall of the present invention.

In the picture: 1—wall panel, 2—corbel, 3—sleeve, 4—casing, 5—insert bar, 6—steel plate, 7—anchor bolt, 8—grouting material, 9—support, 10—floor slab, 11—mortar, 101—horn hole, 102—socket slot, 103—grouting groove, 301—outer pipe, 302—pressing sheet, 303—bolt, 304—bolt hole, 305—grouting hole, 306—recess hole, 307 - Grout eye.

Detailed ways

As shown in Figures 1-3, a prefabricated reinforced concrete shear wall consists of a wall panel (1), a corbel (2), a sleeve (3), a casing (4), a rib (5), a steel plate (6) and the anchor bolt (7); the corbel (2) is located on the side of the wall panel (1), and the top surface of the corbel (2) is not less than 600 mm from the top surface of the wall panel (1); the sleeve (3) Embedded in the upper part of the wall panel (1), the top surface of the sleeve (3) is 10 mm away from the top surface of the wall panel (1), and the upper part of the sleeve (3) is the horn hole (101) of the wall panel (1). (3) is two rows; the sleeve (4) is pre-buried on the side of the wall panel (1), the sleeve (4) and the corbel (2) are on the same side of the wall panel (1), and the sleeve (4) The position is higher than the position of the corbel (2), the distance between the top surface of the corbel (2) and the center of the casing (4) is determined according to the thickness of the floor, not less than 100 mm, and the casing (4) is in a row; 5) It protrudes from the bottom surface of the wall panel (1), and the protruding length is not less than 200 mm. The rib (5) is in two rows, and the upper part of the rib (5) is connected with the sleeve (3), and the connection method is screw connection; The steel plate (6) protrudes from the bottom surface of the wall panel (1), the steel plate (6) is located between the two rows of insertion ribs (5), and the extension length of the steel plate (6) is less than the extension length of the insertion reinforcement (5); The bolts (7) are pre-buried on the two sides of the wall panel (1), and there are two sets of anchor bolts (7), one is above the corbel (2), the other is below the corbel (2), and the other two are There are 16 anchor bolts (7) on each side. There are two rows of horn holes (101) on the top of the wall plate (1). The upper mouth of the horn hole (101) is large and the lower mouth is small. The diameter of the lower mouth of the horn hole (101) is the same as the inner diameter of the sleeve (3). The lower part of the hole (101) is the sleeve (3), and the height of the horn hole (101) is 10 mm; the top of the wall plate (1) has a socket (102), and the socket (102) is located in the two rows of horn holes Between (101), the position of the bearing slot (102) corresponds to the position of the steel plate (6), and the depth of the bearing slot (102) is 5 mm greater than the protruding length of the steel plate (6); the grouting groove (103) On both sides of the wall panel (1), the position of the grouting groove (103) corresponds to the position of the sleeve (3), and one side of the sleeve (3) is connected with the grouting groove (103).

As shown in Figures 4-5, the sleeve (3) consists of an outer tube (301), a pressing piece (302) and a bolt (303); the pressing piece (302) has a crescent-shaped section, and the pressing piece (302) is located at the Inside the outer tube (301), the pressing sheet (302) and the outer tube (301) form a circular channel, and the pressing sheet (302) is provided with a plurality of concave holes (306) and a grouting eye (307), and the concave holes (306) and the grouting eye (307) are round, the concave hole (306) does not penetrate the pressing sheet (302), the grouting eye (307) penetrates the pressing sheet (302), and there is a thread in the grouting eye (307); the outer pipe ( The upper part of 301) is irregular in shape, and there are multiple bolt holes (304) and a grouting hole (305) on it. , there is no thread in the grouting hole (305), the lower part of the outer pipe (301) is a round pipe, and there are threads in the round pipe, which are used to connect the insert bars in the shear wall of this piece; the permanent anchoring bolts (303) are fixed on the outer pipe ( 301) in the bolt hole (304), the temporary fixing bolt (303) is fixed in the grouting hole (307) of the pressing piece (302); the position of the bolt hole (304) of the outer tube (301) is the same as the pressing piece (302) The positions of the concave holes (306) correspond to the positions of the grouting holes (305) of the outer tube (301) and the positions of the grouting holes (307) of the pressing sheet (302) correspond to form circular channels.

Figure 6 shows a schematic diagram of the connection between the rib and the sleeve. The rib (5) is inserted into the sleeve (3), and the bolts (303) at the bolt holes (304) of the outer tube (301) are tightened, so that the pressing plate ( 302) Stuck the rib (5).

Figure 7 shows the construction process diagram of the prefabricated reinforced concrete shear wall. The whole construction process is divided into five steps: a, b, c, d, and e. The specific construction process is: construction step a, in the lower shear wall wall The fluid grouting material (8) is poured into the socket (102) of the body (1); in construction step b, the positions of the upper shear wall and the lower shear wall are aligned, and the Insert the rib (5) into the sleeve (3) of the lower shear wall, and at the same time insert the steel plate (6) of the upper shear wall into the socket (102) of the lower shear wall. 9) The connector at one end is fixed on the lower anchor bolt (7) of the upper shear wall, and the connector at the other end of the support (9) is fixed on the upper anchor bolt (7) of the lower shear wall. 1) Install supports (9) on both sides, adjust the length of the two supports (9) at the same time, and apply downward pressure to the upper shear wall, so that the bottom surface of the upper shear wall (1) It is in close contact with the top surface of the lower shear wall body (1); in construction step c, unscrew the bolt (303) at the position of the grouting hole (305) on the lower shear wall sleeve (3), and loosen the pressing sheet (302), tighten the bolts (303) on the bolt holes (304) of the sleeve (3), so that the pressing piece (302) is stuck on the insertion rib (5) of the upper shear wall; construction step d, loosen the corbel (2) One side supports the connector at the lower part of (9), adjust the length of the support (9), and fix the connector at the lower part of the support (9) on the floor (10); construction step e, in the lower shear wall sleeve A grouting pipe is inserted into the grouting hole (305) of (3), and the fluid grouting material (8) is poured under pressure. After the grouting material (8) is solidified, the grouting of the lower shear wall is sealed with mortar (11). Slot (103).

Claims (2)

1. The utility model provides a prefabricated reinforced concrete shear force wall, comprises wallboard, bracket, sleeve pipe, dowel steel, steel sheet and crab-bolt, characterized by: the bracket is positioned on the side surface of the wallboard, and the distance between the top surface of the bracket and the top surface of the wallboard is not less than 600 mm; the sleeves are embedded in the upper part of the wallboard, the distance between the top surface of each sleeve and the top surface of the wallboard is 10 mm, the upper parts of the sleeves are horn holes of the wallboard, and the number of the sleeves is two; the sleeve is embedded in the side face of the wallboard, the sleeve and the bracket are arranged on the same side face of the wallboard, the position of the sleeve is higher than that of the bracket, the distance between the top face of the bracket and the center of the sleeve is not less than 100 mm, and the sleeves are arranged in a row; the joint bars extend out of the bottom surface of the wall plate, the extending length is not less than 200 mm, the joint bars are arranged in two rows, and the upper parts of the joint bars are connected with the sleeves; the steel plate extends out of the bottom surface of the wallboard, the steel plate is positioned between the two rows of the joint bars, and the extending length of the steel plate is smaller than that of the joint bars; the anchor bolts are embedded in two side surfaces of the wallboard, and two groups of anchor bolts are arranged, one group of anchor bolts is arranged above the bracket, the other group of anchor bolts is arranged below the bracket, and the two side surfaces are provided with 16 anchor bolts; two rows of horn holes are formed in the top of the wallboard, the upper openings of the horn holes are large, the lower openings of the horn holes are small, the diameter of the lower openings of the horn holes is the same as the inner diameter of the sleeve, and the height of the horn holes is 10 mm; the top of the wallboard is provided with a socket slot, the socket slot is positioned between the two rows of horn holes, the position of the socket slot corresponds to the position of the steel plate, and the depth of the socket slot is 5 mm greater than the extension length of the steel plate; the grouting grooves are positioned on two side surfaces of the wallboard, the positions of the grouting grooves correspond to the positions of the sleeves, and one side surface of each sleeve is connected with the grouting groove; the sleeve consists of an outer pipe, a pressing sheet and a bolt; the section of the pressing sheet is crescent, the pressing sheet is positioned in the outer tube, the pressing sheet and the outer tube form a circular pore channel, the pressing sheet is provided with a plurality of concave holes and a grouting hole, the concave holes and the grouting hole are circular, the concave holes do not penetrate through the pressing sheet, the grouting hole penetrates through the pressing sheet, and the grouting hole is internally provided with a thread; the upper part of the outer pipe is irregular, a plurality of bolt holes and a grouting hole are formed in the upper part of the outer pipe, the bolt holes and the grouting hole are both circular, threads are formed in the bolt holes, no threads are formed in the grouting hole, the lower part of the outer pipe is a circular pipe, and threads are formed in the circular pipe; the position of the bolt hole of the outer pipe corresponds to the position of the concave hole of the pressing sheet to form a circular pore channel, and the position of the grouting hole of the outer pipe corresponds to the position of the grouting hole of the pressing sheet to form a circular pore channel.

2. A construction method for realizing the prefabricated reinforced concrete shear wall of claim 1 is characterized by comprising the following steps of: pouring grouting material with fluidity into the socket groove of the lower shear wall body; aligning the positions of an upper shear wall and a lower shear wall, inserting a dowel of the upper shear wall into a sleeve of the lower shear wall, simultaneously inserting a steel plate of the upper shear wall into a socket groove of the lower shear wall, fixing a connector at one end of a support on a lower anchor bolt of the upper shear wall, fixing a connector at the other end of the support on an upper anchor bolt of the lower shear wall, mounting supports on two side surfaces of the wall body, adjusting the lengths of the two supports simultaneously, and applying downward pressure to the upper shear wall to enable the bottom surface of the wall body of the upper shear wall to be in close contact with the top surface of the wall body of the lower shear wall; screwing off the bolt at the position of the grouting hole on the sleeve of the lower shear wall, loosening the pressing sheet, and screwing down the bolt on the bolt hole of the sleeve to enable the pressing sheet to clamp the joint bar of the upper shear wall; loosening the connector at the lower part of the bracket support at one side of the bracket, adjusting the length of the support, and fixing the connector at the lower part of the support on the floor slab; and inserting a grouting pipe into a grouting hole of the lower shear wall sleeve, pressurizing and grouting the grouting material with fluidity, and blocking a grouting groove of the lower shear wall by adopting mortar after the grouting material is solidified.

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