Small-gap-connected assembled concrete shear wall structure and construction method thereof

Abstract

The present invention relates to the technical field of building industrialization, and discloses a small-seam-connected assembled concrete shear wall structure, comprising a lower precast concrete shear wall located at the bottom, and also comprising two precast concrete shear walls arranged side by side above the lower precast concrete shear wall, wherein short grouting sleeves and long grouting sleeves are respectively pre-embedded on opposite sides of the precast concrete shear wall, and ordinary grouting sleeves are pre-embedded on the lower end surface, the short grouting sleeve is connected to the long grouting sleeve through a bridging steel bar and a high-strength micro-expansion grouting material, and the ordinary grouting sleeve is connected to the second vertical longitudinal reinforcement extending outward from the lower precast concrete shear wall through the high-strength micro-expansion grouting material. The present invention also discloses a construction method for a small-seam-connected assembled concrete shear wall structure. The small-seam-connected assembled concrete shear wall structure and the construction method thereof of the present invention significantly improve the prefabrication rate of precast concrete shear walls and the construction efficiency of on-site horizontal connections.

Description

Technical Field

[0001] The invention relates to the technical field of building industrialization, and in particular to a small-seam-connected assembled concrete shear wall structure and a construction method thereof. Background Art

[0002] Prefabricated concrete structures have the advantages of strong plasticity, environmental protection, fast construction, and high degree of industrialization. They have been rapidly developed in my country in recent years. As an important component of prefabricated concrete structures, prefabricated concrete shear wall structures have been widely used in my country.

[0003] Precast concrete shear walls require vertical and horizontal reinforcement connections at the assembly site to ensure continuity of reinforcement in the prefabricated shear wall structure and to ensure that it has good bearing capacity and seismic resistance.

[0004] At present, the vertical steel bar connection technology of precast concrete shear walls is relatively mature, the assembly site is convenient, and the structural force performance is stable, but the horizontal connection requires on-site steel bar tying and post-cast concrete, which results in a large workload and labor-intensive construction. In addition, the horizontal steel bars extending outward from the precast concrete shear wall are prone to deformation during transportation and handling, and need to be straightened again at the assembly site, which increases the workload on site.

[0005] Therefore, it is necessary to develop a small-seam connected prefabricated concrete shear wall structure to improve the horizontal connection efficiency of the prefabricated concrete structure, reduce the workload at the assembly construction site, and shorten the construction period. Summary of the invention

[0006] The purpose of the present invention is to address the deficiencies of the above-mentioned technology and provide a small-seam-connected assembled concrete shear wall structure and a construction method thereof, which significantly improves the prefabrication rate of prefabricated concrete shear walls and the construction efficiency of on-site horizontal connections.

[0007] To achieve the above-mentioned purpose, the small-slit connected assembled concrete shear wall structure designed by the present invention comprises a lower precast concrete shear wall located at the bottom, and also comprises a first precast concrete shear wall and a second precast concrete shear wall arranged side by side above the lower precast concrete shear wall, wherein the first precast concrete shear wall and the second precast concrete shear wall are respectively pre-buried with a short grouting sleeve and a long grouting sleeve in the horizontal direction on the opposite sides thereof, and the lower end surfaces of the first precast concrete shear wall and the second precast concrete shear wall are both pre-buried with a common grouting sleeve in the vertical direction, The end of the short grouting sleeve away from the edge of the first precast concrete shear wall is connected to a mountain-shaped anchor, and the end of the long grouting sleeve away from the edge of the second precast concrete shear wall is connected to a mountain-shaped anchor. The mountain-shaped anchors are hooked on the first vertical longitudinal reinforcement arranged in the first precast concrete shear wall and the second precast concrete shear wall. The short grouting sleeve is connected to the long grouting sleeve through a bridging steel bar and a high-strength micro-expansion grouting material, and the ordinary grouting sleeve is connected to the second vertical longitudinal reinforcement extending outward from the lower precast concrete shear wall through the high-strength micro-expansion grouting material.

[0008] Preferably, the length of the long grouting sleeve is 1.5 to 2 times that of the short grouting sleeve, the length of the bridging steel bar is twice the length of the middle tooth anchor of the mountain-shaped anchor entering the short grouting sleeve or the long grouting sleeve plus the distance between the first precast concrete shear wall and the second precast concrete shear wall, the diameter of the mountain-shaped anchor and the bridging steel bar is not less than the diameter of the horizontal longitudinal reinforcement in the first precast concrete shear wall and the second precast concrete shear wall, and the side tooth length of the mountain-shaped anchor is not less than 4 to 5 times the diameter of the horizontal longitudinal reinforcement.

[0009] Preferably, an end of the short grouting sleeve away from the edge of the first precast concrete shear wall is connected to an L-shaped grouting pipe, and an end of the long grouting sleeve away from the edge of the second precast concrete shear wall is connected to an L-shaped grouting pipe, and the L-shaped grouting pipe is connected to the outside.

[0010] Preferably, the short grouting sleeve is provided with a Type I rubber sleeve at one end away from the edge of the first precast concrete shear wall, and the long grouting sleeve is provided with a Type I rubber sleeve at one end away from the edge of the second precast concrete shear wall, and a circular hole is opened on the Type I rubber sleeve, and the circular hole is interference fit with the middle tooth of the mountain-shaped anchor.

[0011] Preferably, the short grouting sleeve is connected to a Type II rubber sleeve at one end of the edge of the first precast concrete shear wall, and the long grouting sleeve is connected to a Type II rubber sleeve at one end of the edge of the second precast concrete shear wall. The Type II rubber sleeve is provided with an arc-shaped grouting inlet, and the radius of the arc-shaped grouting inlet is 1.5 to 2 times the inner diameter of the Type II rubber sleeve.

[0012] Preferably, the distance between the first precast concrete shear wall and the second precast concrete shear wall is 20 mm to 40 mm.

[0013] A construction method of the small-slit-connected assembled concrete shear wall structure comprises the following steps:

[0014] A) inserting the bridging steel bar into the long grouting sleeve through the arc-shaped grouting inlet of the type II rubber sleeve and exposing the steel bar to a length of 15 to 20 mm;

[0015] B) hoisting the first precast concrete shear wall and the second precast concrete shear wall, adjusting the distance between the first precast concrete shear wall and the second precast concrete shear wall to 20 mm to 40 mm, and connecting the first precast concrete shear wall and the second precast concrete shear wall with the second vertical longitudinal reinforcement extending outward from the lower precast concrete shear wall through the common grouting sleeve and the high-strength micro-expansion grouting material;

[0016] C) using a clamping tool to move the bridging steel bar in the long grouting sleeve so that the length of the bridging steel bar entering the short grouting sleeve is equal to the length of the middle tooth anchor of the mountain-shaped anchor member entering the short grouting sleeve;

[0017] D) using a template to seal both sides of the gap between the first precast concrete shear wall and the second precast concrete shear wall, and then pouring high-strength micro-expansion grouting material from the top of the gap, the high-strength micro-expansion grouting material flows into the short grouting sleeve and the long grouting sleeve through the arc-shaped grouting inlet of the type II rubber sleeve, and when the high-strength micro-expansion grouting material is discharged from the L-shaped grouting pipe, the L-shaped grouting pipes are sealed one by one using rubber plugs or wooden plugs.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The precast concrete shear wall is fully precast. The first precast concrete shear wall and the second precast concrete shear wall have no exposed horizontal longitudinal reinforcement. Both are fully precast concrete shear walls, and no reinforcement tying and concrete pouring are required at the assembly site.

[0020] 2. The small joint connection between precast concrete shear walls is realized. The joint between two adjacent precast concrete shear walls is only 20mm to 40mm, so only a small amount of high-strength micro-expansion grouting material is needed to complete the gap filling, thus greatly improving the construction efficiency;

[0021] 3. The connection between precast concrete shear walls is reliable. The first precast concrete shear wall and the second precast concrete shear wall are connected by short grouting sleeves, bridging steel bars, long grouting sleeves, high-strength micro-expansion grouting materials, and specially designed mountain-shaped anchors. The mountain-shaped anchors are hooked on the first vertical longitudinal reinforcement, with reasonable force and reliable connection.

[0022] 4. High grouting efficiency. The arc-shaped grouting inlet is specially designed on the type II rubber sleeve, so that the high-strength micro-expansion grouting material can directly enter the short grouting sleeve and the long grouting sleeve through it. Therefore, the high-strength micro-expansion grouting material can be poured from the top of the gap between the precast concrete shear walls without using a pressure grouting machine to pour each short grouting sleeve and the long grouting sleeve one by one, thus the grouting efficiency is high;

[0023] 5. The main work of the present invention is completed in the prefabrication site, which significantly improves the prefabrication rate of the prefabricated concrete shear wall and the construction efficiency of the on-site horizontal connection. In addition, the prefabricated concrete shear wall has no exposed horizontal steel bars, thereby reducing the on-site construction workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a small-slit-connected assembled concrete shear wall structure of the present invention;

[0025] Figure 2 for Figure 1 AA section view;

[0026] Figure 3 for Figure 1 BB section view;

[0027] Figure 4 It is a schematic diagram of the connection between the short grouting sleeve and the long grouting sleeve in the small-joint assembled concrete shear wall structure of the present invention;

[0028] Figure 5 for Figure 1 Schematic diagram of the structure of the medium type I rubber sleeve;

[0029] Figure 6 for Figure 1 Schematic diagram of the structure of the medium type II rubber sleeve.

[0030] The components in the figure are numbered as follows:

[0031] Lower precast concrete shear wall 1, first precast concrete shear wall 2, second precast concrete shear wall 3, short grouting sleeve 4, long grouting sleeve 5, ordinary grouting sleeve 6, mountain-shaped anchor 7, first vertical longitudinal reinforcement 8, bridging steel bar 9, high-strength micro-expansion grouting material 10, second vertical longitudinal reinforcement 11, middle teeth 12, horizontal longitudinal reinforcement 13, side teeth 14, type I rubber sleeve 15, type II rubber sleeve 16, arc-shaped slurry inlet 17, L-shaped slurry outlet pipe 18, and round hole 19. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, a small-seam-connected assembled concrete shear wall structure comprises a lower precast concrete shear wall 1 located at the bottom, and also comprises a first precast concrete shear wall 2 and a second precast concrete shear wall 3 arranged side by side above the lower precast concrete shear wall 1, and a short grouting sleeve 4 and a long grouting sleeve 5 are respectively pre-buried in the horizontal direction on the opposite sides of the first precast concrete shear wall 2 and the second precast concrete shear wall 3, and a common grouting sleeve 6 is pre-buried in the vertical direction on the lower end surfaces of the first precast concrete shear wall 2 and the second precast concrete shear wall 3. One end of the tube 4 away from the edge of the first precast concrete shear wall 2 is connected to a mountain-shaped anchor 7, and one end of the long grouting sleeve 5 away from the edge of the second precast concrete shear wall 3 is connected to the mountain-shaped anchor 7. The mountain-shaped anchors 7 are hooked on the first vertical longitudinal reinforcement 8 arranged in the first precast concrete shear wall 2 and the second precast concrete shear wall 3. The short grouting sleeve 4 is connected to the long grouting sleeve 5 through the bridging steel bar 9 and the high-strength micro-expansion grouting material 10, and the ordinary grouting sleeve 6 is connected to the second vertical longitudinal reinforcement 11 extending outward from the lower precast concrete shear wall 1 through the high-strength micro-expansion grouting material 10.

[0034] In addition, combined Figure 3 As shown, the end of the short grouting sleeve 4 away from the edge of the first precast concrete shear wall 2 is connected to an L-shaped grouting pipe 18, and the end of the long grouting sleeve 5 away from the edge of the second precast concrete shear wall 3 is connected to the L-shaped grouting pipe 18, and the L-shaped grouting pipe 18 is connected to the outside.

[0035] Combination Figure 4 As shown, the short grouting sleeve 4 is provided with a type I rubber sleeve 15 at one end away from the edge of the first precast concrete shear wall 2, and the long grouting sleeve 5 is provided with a type I rubber sleeve 15 at one end away from the edge of the second precast concrete shear wall 3. Figure 5 As shown, a round hole 19 is formed on the type I rubber sleeve 15 , and the round hole 19 is interference-fitted with the middle tooth 12 of the mountain-shaped anchor 7 .

[0036] At the same time, the short grouting sleeve 4 is connected to a type II rubber sleeve 16 at one end of the edge of the first precast concrete shear wall 2, and the long grouting sleeve 5 is connected to a type II rubber sleeve 16 at one end of the edge of the second precast concrete shear wall 3. Figure 6 As shown, the type II rubber sleeve 16 is provided with an arc-shaped slurry inlet 17, and the radius of the arc-shaped slurry inlet 17 is 1.5 times the inner diameter of the type II rubber sleeve 16, and in other embodiments, it may also be 2 times.

[0037] In this embodiment, the length of the long grouting sleeve 5 is 1.5 times that of the short grouting sleeve 4, and may also be twice in other embodiments. In this embodiment, the length of the bridging steel bar 9 is twice the length of the middle tooth 12 of the mountain-shaped anchor 7 anchored in the short grouting sleeve 4 or the long grouting sleeve 5 plus the distance between the first precast concrete shear wall 2 and the second precast concrete shear wall 3. The diameters of the mountain-shaped anchor 7 and the bridging steel bar 9 are not less than the diameters of the horizontal longitudinal bars 13 in the first precast concrete shear wall 2 and the second precast concrete shear wall 3. The length of the side teeth 14 of the mountain-shaped anchor 7 is not less than 4 times the diameter of the horizontal longitudinal bars 13. In other embodiments, the length of the side teeth 14 of the mountain-shaped anchor 7 may also be not less than 5 times the diameter of the horizontal longitudinal bars 13.

[0038] In this embodiment, the distance between the first precast concrete shear wall 2 and the second precast concrete shear wall 3 is 20 mm. In other embodiments, it may also be 40 mm.

[0039] The construction method of the small-slit-connected assembled concrete shear wall structure of this embodiment includes the following steps:

[0040] A) Insert the bridging steel bar 9 into the long grouting sleeve 5 through the arc-shaped grouting inlet 17 of the type II rubber sleeve 16 and expose it to the outside, with an exposed length of 20 mm;

[0041] B) hoisting the first precast concrete shear wall 2 and the second precast concrete shear wall 3, adjusting the distance between the first precast concrete shear wall 2 and the second precast concrete shear wall 3 to 20 mm, and connecting them with the second vertical longitudinal reinforcement 11 extending outward from the lower precast concrete shear wall 1 through the common grouting sleeve 6 and the high-strength micro-expansion grouting material 10;

[0042] C) using a clamping tool to move the bridging steel bar in the long grouting sleeve so that the length of the bridging steel bar entering the short grouting sleeve 4 is equal to the length of the middle teeth 12 of the mountain-shaped anchor 7 anchored in the short grouting sleeve 4;

[0043] D) Use a template to block both sides of the gap between the first precast concrete shear wall 2 and the second precast concrete shear wall 3, and then pour high-strength micro-expansion grouting material 10 from the top of the gap. The high-strength micro-expansion grouting material 10 flows into the short grouting sleeve 4 and the long grouting sleeve 5 through the arc-shaped grouting inlet 17 of the type II rubber sleeve 16. When the high-strength micro-expansion grouting material 10 is discharged from the L-shaped grouting pipe 18, the L-shaped grouting pipe 18 is blocked one by one using a rubber plug or a wooden plug.

[0044] The present invention discloses a prefabricated concrete shear wall structure with small seam connection and a construction method thereof. The prefabricated concrete shear wall is fully prefabricated. The first prefabricated concrete shear wall 2 and the second prefabricated concrete shear wall 3 have no exposed horizontal longitudinal reinforcement 13. Both are fully prefabricated concrete shear walls, and no reinforcement binding and concrete pouring are required at the assembly site. The prefabricated concrete shear walls are connected with small seams. The joint between two adjacent prefabricated concrete shear walls is only 20 mm to 40 mm, so only a small amount of high-strength micro-expansion grouting material 10 is needed to complete the gap filling, thereby greatly improving the construction efficiency. In addition, the prefabricated concrete shear walls are reliably connected, and short grouting sleeves 4 and bridging reinforcements 9 are used. , long grouting sleeve 5, high-strength micro-expansion grouting material 10, specially designed mountain-shaped anchor 7 connect the first precast concrete shear wall 2 and the second precast concrete shear wall 2, wherein the mountain-shaped anchor 7 is hooked on the first vertical longitudinal reinforcement 8, with reasonable force and reliable connection; the grouting efficiency of the present invention is high, and the arc-shaped grouting port 17 is specially designed on the type II rubber sleeve 16, so that the high-strength micro-expansion grouting material 10 can directly enter the short grouting sleeve 4 and the long grouting sleeve 5 through it, so the high-strength micro-expansion grouting material 10 can be poured from the top of the gap between the precast concrete shear walls, without using a pressure grouting machine to pour each short grouting sleeve 4 and the long grouting sleeve 5 one by one, so the grouting efficiency is high. The main work of the present invention is completed in the precast field, which significantly improves the precast rate of the precast concrete shear wall and the construction efficiency of the on-site horizontal connection, and this kind of precast concrete shear wall has no exposed horizontal steel bars 13, so the on-site construction workload can be reduced.

Claims

1. A small-joint assembled concrete shear wall structure, comprising a lower precast concrete shear wall (1) located at the bottom, Features: The invention also comprises a first precast concrete shear wall (2) and a second precast concrete shear wall (3) arranged side by side above the lower precast concrete shear wall (1); a short grouting sleeve (4) and a long grouting sleeve (5) are respectively pre-buried in the horizontal direction on the opposite sides of the first precast concrete shear wall (2) and the second precast concrete shear wall (3); common grouting sleeves (6) are pre-buried in the vertical direction on the lower end surfaces of the first precast concrete shear wall (2) and the second precast concrete shear wall (3); and a mountain-shaped anchor is connected to one end of the short grouting sleeve (4) away from the edge of the first precast concrete shear wall (2). The end of the long grouting sleeve (5) away from the edge of the second precast concrete shear wall (3) is connected to a mountain-shaped anchor (7), and the mountain-shaped anchors (7) are hooked on the first vertical longitudinal reinforcement (8) provided in the first precast concrete shear wall (2) and the second precast concrete shear wall (3). The short grouting sleeve (4) is connected to the long grouting sleeve (5) through a bridging steel bar (9) and a high-strength micro-expansion grouting material (10), and the ordinary grouting sleeve (6) is connected to the second vertical longitudinal reinforcement (11) extending outward from the lower precast concrete shear wall (1) through the high-strength micro-expansion grouting material (10).

2. The small-slit-connected assembled concrete shear wall structure as claimed in claim 1, Features: The length of the long grouting sleeve (5) is 1.5 to 2 times that of the short grouting sleeve (4); the length of the bridging steel bar (9) is twice the length of the middle tooth (12) of the mountain-shaped anchor (7) anchored in the short grouting sleeve (4) or the long grouting sleeve (5) plus the distance between the first precast concrete shear wall (2) and the second precast concrete shear wall (3); the diameters of the mountain-shaped anchor (7) and the bridging steel bar (9) are not less than the diameters of the horizontal longitudinal bars (13) in the first precast concrete shear wall (2) and the second precast concrete shear wall (3); and the length of the side teeth (14) of the mountain-shaped anchor (7) is not less than 4 to 5 times the diameter of the horizontal longitudinal bars (13).

3. The small-slit-connected assembled concrete shear wall structure as claimed in claim 2, Features: An end of the short grouting sleeve (4) away from the edge of the first precast concrete shear wall (2) is connected to an L-shaped grouting pipe (18), and an end of the long grouting sleeve (5) away from the edge of the second precast concrete shear wall (3) is connected to an L-shaped grouting pipe (18), and the L-shaped grouting pipe (18) is communicated with the outside.

4. The small-slit-connected assembled concrete shear wall structure as claimed in claim 3, Features: The short grouting sleeve (4) is provided with a type I rubber sleeve (15) at one end away from the edge of the first precast concrete shear wall (2), and the long grouting sleeve (5) is provided with a type I rubber sleeve (15) at one end away from the edge of the second precast concrete shear wall (3). A circular hole (19) is formed on the type I rubber sleeve (15), and the circular hole (19) is interference-fitted with the middle tooth (12) of the mountain-shaped anchor (7).

5. The small-slit-connected assembled concrete shear wall structure as claimed in claim 4, Features: The short grouting sleeve (4) is connected to a type II rubber sleeve (16) at one end of the edge of the first precast concrete shear wall (2), and the long grouting sleeve (5) is connected to a type II rubber sleeve (16) at one end of the edge of the second precast concrete shear wall (3). The type II rubber sleeve (16) is provided with an arc-shaped grouting inlet (17), and the radius of the arc-shaped grouting inlet (17) is 1.5 to 2 times the inner diameter of the type II rubber sleeve (16).

6. The small-slit-connected assembled concrete shear wall structure as claimed in claim 5, Features: The distance between the first precast concrete shear wall (2) and the second precast concrete shear wall (3) is 20 mm to 40 mm.

7. A construction method for a small-joint assembled concrete shear wall structure as claimed in claim 6, Features: The steps include: A) inserting the bridge steel bar (9) into the long grouting sleeve (5) through the arc-shaped grouting inlet (17) of the type II rubber sleeve (16) and exposing the steel bar to an exposed length of 15 to 20 mm; B) hoisting the first precast concrete shear wall (2) and the second precast concrete shear wall (3), adjusting the distance between the first precast concrete shear wall (2) and the second precast concrete shear wall (3) to 20 mm to 40 mm, and connecting them with the second vertical longitudinal reinforcement (11) extending outward from the lower precast concrete shear wall (1) through the common grouting sleeve (6) and the high-strength micro-expansion grouting material (10); C) using a clamping tool to move the bridging steel bar in the long grouting sleeve so that the length of the bridging steel bar entering the short grouting sleeve (4) is equal to the length of the middle tooth (12) of the mountain-shaped anchor (7) anchored in the short grouting sleeve (4); D) using a template to seal both sides of the gap between the first precast concrete shear wall (2) and the second precast concrete shear wall (3), and then pouring high-strength micro-expansion grouting material (10) from the top of the gap, the high-strength micro-expansion grouting material (10) flows into the short grouting sleeve (4) and the long grouting sleeve (5) through the arc-shaped grouting inlet (17) of the type II rubber sleeve (16), and when the high-strength micro-expansion grouting material (10) is discharged from the L-shaped grouting pipe (18), the L-shaped grouting pipe (18) is sealed one by one using a rubber plug or a wooden plug.

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