Connection structure and construction method of prefabricated shear wall structure

Abstract

The present invention discloses a connection structure and construction method for an assembled shear wall structure. The connection structure includes: a notch is reserved at the top of the lower prefabricated shear wall, a horizontal connection unit is cast in the notch, a vertical anchor bar is reserved at the bottom of the upper prefabricated shear wall, the vertical anchor bar is inserted into and anchored in the horizontal connection unit, horizontal connection bars are reserved at the ends of the lower prefabricated shear wall and the upper prefabricated shear wall, and steel structure connectors are installed, the horizontal connection bars are anchored to the steel structure connectors, and the steel structure connectors define a vertical casting space at the ends of the lower prefabricated shear wall and the upper prefabricated shear wall, respectively, and the vertical connection unit is cast in the vertical casting space. The prefabricated shear wall connection proposed by the present invention adopts a cast-in-place or grouting method, which avoids the problem of steel bar misalignment, greatly reduces the difficulty of aligning the steel bar and the sleeve when the prefabricated shear wall is hoisted on site, and improves the reliability of the connection position and the construction speed.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled structures of building structures, and in particular to a connection structure and a construction method of an assembled shear wall structure. Background Art

[0002] Prefabricated concrete structures are constructed using prefabricated components as their primary load-bearing elements, assembled and connected together. Prefabricated reinforced concrete structures are a key development direction for building structures in my country. They contribute to the industrialization of my country's construction industry, improve production efficiency, conserve energy, and promote the development of green and environmentally friendly buildings. Compared to cast-in-place construction methods, prefabricated PC structures promote green construction because they better meet the green construction requirements of land conservation, energy conservation, material conservation, water conservation, and environmental protection. They also minimize negative environmental impacts, including noise reduction, dust control, reduced environmental pollution, clean transportation, minimal site disturbance, and conservation of resources and energy such as water, electricity, and materials, adhering to the principles of sustainable development.

[0003] Shear wall structures offer significant lateral stiffness and can effectively support large horizontal loads, making them a common structural form in current buildings. Properly arranging shear wall components can enhance the overall rigidity of a building structure and improve its load-bearing capacity. They are widely used in high-rise and super-high-rise buildings.

[0004] At present, the common construction process of prefabricated shear wall structures mainly adopts the construction method of prefabricating the walls in the factory, hoisting them on site, and pouring them on site at the joints. The vertical connection methods of prefabricated walls mainly include grouting anchor connection and grouting sleeve connection; prefabricated walls often have more steel bars and smaller diameters, which makes it difficult to align the wall with the grouting channel during on-site hoisting, and blockage is prone to occur during the grouting process, affecting the connection performance of the wall. The horizontal connection method of prefabricated walls mainly adopts the method of reserving additional connecting steel bars at the edge of the wall and pouring the connection area on site; the steel bars at the connection position are relatively densely arranged, resulting in difficulty in hoisting this connection process, complex assembly process, and difficult to control on-site construction quality, posing a great safety hazard to the structure. Summary of the Invention

[0005] The present invention mainly addresses the deficiencies of the existing technology and provides a connection structure and construction method for an assembled shear wall structure, which can effectively ensure construction quality and improve the reliability of the connection position and the construction speed.

[0006] The technical solution adopted in the present invention is:

[0007] A connection structure of an assembled shear wall structure, comprising: a notch reserved at the top of a lower prefabricated shear wall, a horizontal connection unit cast in the notch, a vertical anchor bar reserved at the bottom of an upper prefabricated shear wall, the vertical anchor bar inserted into and anchored in the horizontal connection unit, horizontal connection bars reserved at both side ends of the lower prefabricated shear wall and the upper prefabricated shear wall and steel structure connectors installed, the horizontal connection bars anchored to the steel structure connectors, the steel structure connectors defining a vertical casting space at both side ends of the lower prefabricated shear wall and the upper prefabricated shear wall, and vertical connection units cast in the vertical casting space.

[0008] In some embodiments of the connection structure of the present invention, horizontal tie bars are connected between the side walls of the notch.

[0009] In some embodiments of the connection structure of the present invention, the shape of the notch is trapezoidal or rectangular.

[0010] In some embodiments of the connection structure of the present invention, the notch is continuously provided along the width direction of the lower prefabricated shear wall.

[0011] In some embodiments of the connection structure of the present invention, the notches are arranged in sections along the width direction of the lower prefabricated shear wall.

[0012] In some embodiments of the connection structure of the present invention, vertical ribs and studs are provided in the steel structure connector, the studs are welded and fixed to the inner side of the steel structure connector, and the vertical ribs are passed through the vertical casting space inside the steel structure connector.

[0013] In some embodiments of the connection structure of the present invention, the horizontal connection unit is cast on-site using concrete or grouting material.

[0014] In some embodiments of the connection structure of the present invention, the vertical connection units are cast in sections on-site using concrete or grouting materials.

[0015] In some embodiments of the connection structure of the present invention, a notch is reserved at the top of the upper prefabricated shear wall for installing the prefabricated shear wall of the upper layer.

[0016] A connection construction method for an assembled shear wall structure comprises the following steps:

[0017] Install the lower prefabricated shear wall, reserve a notch at the top of the lower prefabricated shear wall, and reserve horizontal connecting reinforcement at both ends of the lower prefabricated shear wall;

[0018] The notch reserved at the top of the lower prefabricated shear wall is poured and filled, and the upper prefabricated shear wall is installed before the pouring material solidifies. Vertical anchor bars are reserved at the bottom of the upper prefabricated shear wall, and the vertical anchor bars are inserted into the notch at the top of the upper prefabricated shear wall. Horizontal connecting bars are also reserved at both ends of the upper prefabricated shear wall.

[0019] Installing steel structure connectors at both ends of the lower prefabricated shear wall and the upper prefabricated shear wall, anchoring the horizontal connecting bars to the steel structure connectors, wherein the steel structure connectors define a vertical casting space at both ends of the lower prefabricated shear wall and the upper prefabricated shear wall;

[0020] The vertical pouring space is filled by pouring to complete the connection between the lower prefabricated shear wall and the upper prefabricated shear wall.

[0021] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0022] 1. The vertical connection of the prefabricated shear wall proposed by the present invention adopts the method of cast-in-place or grouting. The vertical anchor bars at the bottom of the prefabricated shear wall of the upper layer are directly embedded in the reserved notches at the top of the prefabricated shear wall of the lower layer. This avoids the problem of misalignment of the steel bars and greatly reduces the difficulty of aligning the steel bars and sleeves during on-site hoisting of the prefabricated shear wall. This can effectively ensure the construction quality and improve the reliability of the connection position and the construction speed.

[0023] 2. The precast shear wall proposed in the present invention uses steel connectors and poured concrete or grouting to connect the precast shear wall to the concealed column area at the end. The horizontal connecting bars of the precast shear wall are directly anchored into the steel connectors, and the steel connectors are provided with vertical bars and studs, so that the steel connectors and the precast shear wall form a good whole. This not only saves the trouble of supporting formwork, but also greatly improves the bearing capacity of the concealed column area of the shear wall.

[0024] 3. The horizontal connection unit proposed in the present invention can be cast first, and then the precast shear wall of the upper layer can be inserted into the reserved groove of the precast shear wall of the lower layer, avoiding the problem of incomplete grouting and the inability to conduct quality inspection. The material for on-site casting can be fine stone concrete or premixed high-strength grouting material;

[0025] 4. The vertical connection unit proposed by the present invention can be cast in sections after the steel structure connectors at the ends of the prefabricated shear wall are connected. Since the steel structure connectors also serve as formwork, no additional formwork is required, which has great flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a front schematic diagram of the connection structure of the prefabricated shear wall structure according to an embodiment of the present invention.

[0028] Figure 2 Schematic top view of the connection structure of the prefabricated shear wall structure according to an embodiment of the present invention (the horizontal tie bars of the notches are not shown in the figure).

[0029] Figure 3 for Figure 2 Schematic cross-section diagram at 1-1.

[0030] Figure 4 for Figure 2 Schematic cross-sectional view at 2-2.

[0031] Figure 5 It is a three-dimensional schematic diagram of a prefabricated shear wall in an embodiment of the present invention.

[0032] Figure 6 It is a three-dimensional schematic diagram of a steel structure connector in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 6As shown, an embodiment of the present invention provides a connection structure and construction method of a novel prefabricated shear wall structure, wherein the connection structure of the prefabricated shear wall structure is mainly composed of a prefabricated shear wall 10, a steel structure connector 11, a horizontal connection unit 12, and a vertical connection unit 13. The prefabricated shear wall 10 adopts a concrete prefabricated shear wall, and a notch 14 with an opening facing upward is reserved on the top. The shape of the notch can be trapezoidal, rectangular, etc. In this embodiment, it is a trapezoid with the short side facing upward. A plurality of horizontal tie bars 141 are connected between the side walls of the notch 14 on the top of the prefabricated shear wall 10. The notch 14 is arranged along the width direction of the prefabricated shear wall 10, and the arrangement of the notch 14 can be set as a continuous through setting or a segmented setting.

[0036] The other three sides of the precast shear wall 10 are provided with anchor bars, with vertical anchor bars 15 at the bottom and horizontal connecting bars 16 on both sides. When connecting the upper and lower layers of precast shear walls 10, the vertical anchor bars 15 at the bottom of the precast shear wall 10 of the upper layer are inserted into the reserved notches 14 at the top of the precast shear wall 10 of the lower layer. The horizontal connecting unit 12 can be formed by pouring concrete or high-strength grouting material into the notches 14. The horizontal connecting unit 12 can be poured first, and then before the horizontal connecting unit 12 solidifies, the vertical anchor bars 15 at the bottom of the precast shear wall 10 of the upper layer are promptly inserted into the notches 14 at the top of the precast shear wall 10 of the lower layer. The precast shear walls 10 of the upper and lower layers are connected as a whole through the vertical anchor bars 15 and the horizontal connecting unit 12, thus avoiding the problem of incomplete grouting and the inability to conduct quality inspections. The material for on-site pouring can be fine stone concrete or premixed high-strength grouting material.

[0037] The concealed column areas at both ends of the precast shear wall 10 are connected to the precast shear wall 10 by means of steel structure connectors 11 and pouring concrete or grouting material. The horizontal connecting bars 16 at both ends of the precast shear wall 10 are directly anchored into the steel structure connectors 11, and vertical bars 17 and stud bolts 18 are arranged in the steel structure connectors 11, so that the steel structure connectors 11 and the precast shear wall 10 form a good whole, which can not only save the trouble of formwork support, but also the steel structure connectors 11 themselves can greatly improve the bearing capacity of the concealed column area of the shear wall. In specific construction, after the horizontal connection of the upper and lower precast shear walls 10 is completed, the steel structure connectors 11 are respectively installed at both ends of the precast shear wall 10. The steel structure connectors 11 respectively define a vertical pouring space at both ends of the precast shear wall 10. The vertical connection unit 13 can be formed by segmentally pouring concrete or high-strength grouting material on site in the above vertical pouring space. The vertical connection unit 13 is tied into a whole with the stud bolts 18 on the inner side surface of the steel structure connector 11. Further, before installing the above steel structure connectors 11, vertical bars 17 can be pre-tied to the horizontal connecting bars 16 on both sides of the precast shear wall 10 to improve the bearing capacity of the concealed column areas on both sides of the shear wall. In this embodiment, the structure of the steel structure connector 11 is as Figure 6 shown, with a cross-section in the shape of "[", sleeved on both ends of the precast shear wall 10, forming two vertical pouring spaces for the vertical connection unit 13 to be poured in segments. Thus, the steel structure connector 11 can serve as a formwork, and no additional formwork support is required when constructing the concealed column areas on both sides of the precast shear wall, which has great flexibility and greatly simplifies the construction.

[0038] Among them, the cross-section of the steel structure connector 11 can be in the shape of "[", "∟" or "I", and stud bolts 18 for increasing connection are provided inside. When the shear wall is designed as a "one" shape, the steel structure connectors in the shape of "[", "I" are used. When the shear wall is designed as a "T" shape or an "L" shape, the steel structure connectors in the shape of "∟" are used.

[0039] As Figures 1 to 6 shown, the present invention also provides a connection construction method for an assembled shear wall structure, which is realized by using the connection of the above assembled shear wall structure. The specific steps are as follows:

[0040] Step 1: Install the first layer of precast shear wall 10. Insert the bottom anchor bars of the precast shear wall 10 into the grooves reserved in the foundation and carry out temporary fixation;

[0041] Step 2: Tie the vertical steel bars at both ends of the precast shear wall. They can be tied in sections of 2 to 3 layers, and enough anchorage lapping length should be left;

[0042] Step 3: Pour concrete or grouting material into the notch 14 reserved at the top of the first layer of prefabricated shear wall 10, and install the second layer of prefabricated shear wall 10 in a timely manner after leveling. When installing the second layer of prefabricated shear wall 10, directly insert the vertical anchor bars 15 at the bottom of the second layer of prefabricated shear wall 10 into the notch 14 at the top of the first layer of prefabricated shear wall 10, and then temporarily fix it;

[0043] Step 4: Install the steel structure connectors 11 at both ends of the shear wall and pour concrete or grouting material into the steel structure connectors 11. In this way, a complete shear wall is completed.

[0044] Step 5: Continue with steps 1-4, pouring concrete or grouting into the second-story precast shear wall, installing the third-story precast shear wall, tying the vertical reinforcement at both ends of the precast shear wall, installing the steel connectors, and pouring concrete or grouting into the steel connectors. Repeat this process to complete the entire shear wall installation.

[0045] The advantages of the connection structure and construction method of the assembled shear wall structure of the present invention over the prior art are:

[0046] 1. The vertical connection of the prefabricated shear wall proposed by the present invention adopts the method of cast-in-place or grouting. The vertical anchor bars at the bottom of the prefabricated shear wall of the upper layer are directly embedded in the reserved notches at the top of the prefabricated shear wall of the lower layer. This avoids the problem of misalignment of the steel bars and greatly reduces the difficulty of aligning the steel bars and sleeves during on-site hoisting of the prefabricated shear wall. This can effectively ensure the construction quality and improve the reliability of the connection position and the construction speed.

[0047] 2. The precast shear wall proposed in the present invention uses steel connectors and poured concrete or grouting to connect the precast shear wall to the concealed column area at the end. The horizontal connecting bars of the precast shear wall are directly anchored into the steel connectors, and the steel connectors are provided with vertical bars and studs, so that the steel connectors and the precast shear wall form a good whole. This not only saves the trouble of supporting formwork, but also greatly improves the bearing capacity of the concealed column area of the shear wall.

[0048] 3. The horizontal connection unit proposed in the present invention can be cast first, and then the precast shear wall of the upper layer can be inserted into the reserved groove of the precast shear wall of the lower layer, avoiding the problem of incomplete grouting and the inability to conduct quality inspection. The material for on-site casting can be fine stone concrete or premixed high-strength grouting material;

[0049] 4. The vertical connection unit proposed by the present invention can be cast in sections after the steel structure connectors at the ends of the prefabricated shear wall are connected. Since the steel structure connectors also serve as formwork, no additional formwork is required, which has great flexibility.

[0050] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0051] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A connection structure of an assembled shear wall structure, characterized in that: include: A notch is reserved at the top of the lower prefabricated shear wall, and a horizontal connection unit is cast in the notch. A vertical anchor bar is reserved at the bottom of the upper prefabricated shear wall, and the vertical anchor bar is inserted into and anchored in the horizontal connection unit. Horizontal connection bars and steel structure connectors are respectively reserved at the two side ends of the lower prefabricated shear wall and the upper prefabricated shear wall. The horizontal connection bars are anchored to the steel structure connectors. The steel structure connectors define a vertical casting space at the two side ends of the lower prefabricated shear wall and the upper prefabricated shear wall, and the vertical connection unit is cast in the vertical casting space. The steel structure connector is provided with vertical ribs and studs, the studs are welded and fixed to the inner side of the steel structure connector, and the vertical ribs are passed through the vertical casting space inside the steel structure connector; The cross-section of the steel structure connector can be "[", "∟" or "I" shaped. When the shear wall is designed as an "I" shape, "[" and "I" shaped steel structure connectors are used. When the shear wall is designed as a "T" or "L" shape, "∟" shaped steel structure connectors are used.

2. The connection structure of the assembled shear wall structure according to claim 1, characterized in that: Horizontal tie bars are connected between the side walls on both sides of the notch.

3. The connection structure of the assembled shear wall structure according to claim 1, wherein: The shape of the notch is trapezoidal or rectangular.

4. The connection structure of the assembled shear wall structure according to claim 1, wherein: The notches are continuously arranged along the width direction of the lower prefabricated shear wall.

5. The connection structure of the assembled shear wall structure according to claim 1, wherein: The notches are arranged in sections along the width direction of the lower prefabricated shear wall.

6. The connection structure of the assembled shear wall structure according to claim 1, wherein: The horizontal connection unit is cast on site using concrete or grouting material.

7. The connection structure of the assembled shear wall structure according to claim 1, characterized in that: The vertical connection units are cast in sections on site using concrete or grouting materials.

8. The connection structure of the assembled shear wall structure according to claim 1, wherein: A notch is reserved at the top of the upper prefabricated shear wall for installing the prefabricated shear wall of the upper layer.

9. A method for connecting and constructing an assembled shear wall structure, using the connection structure according to any one of claims 1 to 8, characterized in that: Including steps: Install the lower prefabricated shear wall, reserve a notch at the top of the lower prefabricated shear wall, and reserve horizontal connecting reinforcement at both ends of the lower prefabricated shear wall; The notch reserved at the top of the lower prefabricated shear wall is poured and filled, and the upper prefabricated shear wall is installed before the pouring material solidifies. Vertical anchor bars are reserved at the bottom of the upper prefabricated shear wall, and the vertical anchor bars are inserted into the notch at the top of the upper prefabricated shear wall. Horizontal connecting bars are also reserved at both ends of the upper prefabricated shear wall. Installing steel structure connectors at both ends of the lower prefabricated shear wall and the upper prefabricated shear wall, anchoring the horizontal connecting bars to the steel structure connectors, wherein the steel structure connectors define a vertical casting space at both ends of the lower prefabricated shear wall and the upper prefabricated shear wall; The vertical pouring space is filled by pouring to complete the connection between the lower prefabricated shear wall and the upper prefabricated shear wall.

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