A kind of assembled concrete structure and construction method thereof

Abstract

The present application relates to an assembled concrete structure and a construction method thereof, and belongs to the technical field of assembled building construction. An assembled concrete structure comprises a composite plate arranged in a direction parallel to the bottom surface, a plurality of prefabricated wall panels arranged vertically on the composite plate, and a cast-in-place section arranged at the joint of two adjacent prefabricated wall panels; the composite plate comprises horizontal structural ribs overlapped in the horizontal direction, a plate body wrapped on the outside of the horizontal structural ribs, a plurality of longitudinal connecting ribs passing through the plate body, and a plurality of grouting cones sleeved on the longitudinal connecting ribs; the longitudinal connecting ribs are perpendicular to the plane where the plate body is located, and are fixedly connected to the horizontal structural ribs, the grouting cones are rotatably connected to the longitudinal connecting ribs, and a grouting pipe is provided in the horizontal direction. The present application has the advantages of high construction efficiency and strong structural bearing capacity.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated building construction, and in particular to a prefabricated concrete structure and a construction method thereof. Background Art

[0002] Prefabricated concrete buildings refer to concrete structures designed and constructed mainly with factory-produced prefabricated reinforced concrete components through on-site assembly. They are generally divided into two categories: fully prefabricated buildings and partially prefabricated buildings. Fully prefabricated buildings are generally low-rise or multi-story buildings with low seismic fortification requirements; the main components of partially prefabricated buildings are generally prefabricated components, which are connected on-site with cast-in-place concrete to form a prefabricated monolithic structure. Since partially prefabricated buildings can have better structural strength while ensuring construction speed, they are more conducive to winter construction and have high production efficiency.

[0003] At present, the prefabricated panels in common partially assembled buildings are fixedly connected to the foundation plane by grouting after steel bars are inserted. The structural defects such as pores generated during the grouting process are not easy to be found. The structural characteristics of the prefabricated panels make it difficult to compact and defoam the grouting positions through conventional methods such as vibration after grouting. The common prefabricated panels use a structure with multiple groups of steel bars inserted and multiple groups of grouting holes, which means that there are more cavities that need to be grouted and more steel bar connectors that need to be straightened in advance. This further increases the difficulty of hoisting and aligning holes for prefabricated panels, which is not conducive to the efficient and high-quality construction of prefabricated buildings.

[0004] In view of the above-mentioned relevant technical background, the inventor believes that the existing partially assembled building construction process has defects in the hole alignment and grouting operations of prefabricated panels, which affect the overall construction efficiency and construction quality. Summary of the invention

[0005] In order to improve the construction quality and efficiency of partially assembled buildings and reduce the difficulty of hoisting and grouting operations of prefabricated panels, the present application provides an assembled concrete structure and a construction method thereof.

[0006] In the first aspect, the present application provides an assembled concrete structure adopting the following technical solution:

[0007] An assembled concrete structure comprises a composite plate arranged in a direction parallel to a bottom surface, a plurality of prefabricated wall panels arranged vertically on the composite plate, and a cast-in-place section arranged at the joint of two adjacent prefabricated wall panels; the composite plate comprises horizontal structural ribs overlapped in a horizontal direction, a plate body wrapped around the outside of the horizontal structural ribs, a plurality of longitudinal connecting ribs penetrating the plate body, and a plurality of grouting cones sleeved on the longitudinal connecting ribs; the longitudinal connecting ribs are perpendicular to the plane where the plate body is located and are fixedly connected to the horizontal structural ribs, the grouting cones are rotatably connected to the longitudinal connecting ribs, and a grouting pipe is provided in the horizontal direction.

[0008] By adopting the above technical scheme, the composite slab fixedly arranged in the horizontal direction can be used as the ground foundation to bear the prefabricated wall panels. The prefabricated wall panels vertically installed on the composite slab can act as wall panels to divide the space and make it a complete building. The cast-in-place section arranged at the connection between two adjacent prefabricated wall panels is a connection mechanism formed by pouring on-site after the prefabricated wall panels are installed, which ensures the bearing capacity of the connection part of the prefabricated wall panels. The horizontal structural ribs arranged in the horizontal direction of the composite slab improve the tensile strength of the composite slab, and the concrete plate body wrapped on the outside of the horizontal structural ribs improves the compressive structure of the composite slab. The longitudinal connecting ribs vertically passing through the plate body play the role of fixing and connecting the prefabricated wall panels. The structural design of the fixed connection between the longitudinal connecting ribs and the horizontal structural ribs further improves the tensile structural strength of the connection between the composite plate and the prefabricated wall panel. The grouting cone sleeved on the longitudinal connecting ribs can reduce the difficulty of grouting operation and improve the efficiency of grouting operation. The structural design of the rotatable connection between the grouting cone and the longitudinal connecting ribs simplifies the operating steps of the overall construction, achieving the invention purpose of the present application to improve the construction quality and construction efficiency of partially assembled buildings and reduce the difficulty of hoisting and grouting operations of prefabricated panels.

[0009] Optionally, the prefabricated wall panels include longitudinal structural ribs overlapped in a direction perpendicular to the ground, a wall body wrapped around the outside of the longitudinal structural ribs, and a plurality of horizontal connecting ribs arranged on the side faces of the wall body; a connecting hole is opened at a position on the lower surface of the wall body corresponding to the longitudinal connecting ribs; and the connecting hole is a conical hole near the edge of the wall.

[0010] By adopting the above technical scheme, the longitudinal structural reinforcements in the prefabricated wall panels improve the tensile structural strength of the prefabricated wall panels, the concrete wall wrapped on the outside of the longitudinal structural reinforcements in the prefabricated wall panels improves the compressive structural strength of the prefabricated wall panels, and the multiple horizontal connecting reinforcements on the side of the wall play a role in connecting the cast-in-place sections. The conical hole structure opened on the wall ground can simplify the hoisting and hole alignment process of the prefabricated wall panels, thereby improving the overall construction efficiency of partially assembled buildings.

[0011] Optionally, the taper of the conical position of the connecting hole is greater than the taper of the grouting cone, and two connecting holes located on the same side are connected to each other at one end away from the conical hole, and the connecting section is annular.

[0012] By adopting the above technical scheme, the structural design in which the taper of the conical position of the connecting hole is greater than the taper of the grouting cone increases the remaining cavity volume after the grouting cone is inserted into the conical hole, reduces the grouting pressure, and makes the subsequent grouting operation easier to carry out. The structural design in which the two connecting holes are interconnected at one end away from the conical hole reduces the number of grouting required for the fixed installation of the single-sided prefabricated wall panels, further improving the installation efficiency of the prefabricated wall panels. The structural design in which the connecting section of the two connecting holes is annular can facilitate the circulation of slurry, reduce grouting resistance, thereby reducing bubbles and improving the grouting quality.

[0013] Optionally, the horizontal connecting ribs are bent into a semi-circular shape, and a plurality of the horizontal connecting ribs are evenly arranged along the height direction of the wall.

[0014] By adopting the above technical scheme, the semi-circular structural design of the horizontal connecting ribs increases the contact area between the horizontal connecting ribs and the cast-in-place section, and improves the bearing capacity of the connection structure between the cast-in-place section and the prefabricated wall panel. The structure in which multiple horizontal connecting ribs are evenly arranged along the height direction of the wall ensures the connection strength between the prefabricated wall panel and the cast-in-place section at any position in the height direction, and avoids local stress concentration on the horizontal connecting ribs.

[0015] Optionally, a pad is provided in the length direction of the lower surface of the wall, and the thickness of the pad is consistent with the outer diameter length of the grouting pipe.

[0016] By adopting the above technical scheme, the pads arranged along the length direction on the lower surface of the wall body play a buffering and shock-absorbing role in the hoisting process of the prefabricated wall panels. The structural design in which the thickness of the pads is consistent with the outer diameter length of the grouting pipe ensures that the prefabricated wall with the pad structure will not cause excessive squeezing of the grouting pipe during the hoisting process. The pad structure also plays a limiting role, which can reduce the difficulty of casting the formwork at the connection position of the prefabricated wall panel and the composite plate, and improve the installation efficiency of the prefabricated wall panel.

[0017] Optionally, a prefabricated window is provided in the middle of the wall; and a limiting frame is embedded in the prefabricated window of the wall.

[0018] By adopting the above technical solution, the prefabricated window opened in the middle of the wall can be used to install the window, and the limiting frame embedded in the prefabricated window plays a limiting and supporting role on the edge position of the opened prefabricated window to avoid collapse.

[0019] Optionally, a plurality of embedded plates are vertically provided on the outer surface edge of the limiting frame; the embedded plates are fixedly connected to the longitudinal structural ribs.

[0020] By adopting the above technical solution, the embedded plate vertically arranged on the edge of the outer surface of the limiting frame improves the connection strength between the limiting frame and the wall.

[0021] Optionally, the cast-in-place section includes an outer formwork clamped to the prefabricated wall panel and a connecting block coated on the outside of the horizontal connecting rib.

[0022] By adopting the above technical solution, the outer formwork in the cast-in-place section plays a limiting role in the pouring of the connecting block, and the connecting block made of concrete is coated on the outside of the horizontal connecting ribs of the prefabricated wall panels, thereby improving the compressive structural strength of the cast-in-place section.

[0023] Optionally, both side edges of the outer template are provided with clamping blocks in a direction perpendicular to the ground; the cross section of the clamping blocks is triangular.

[0024] By adopting the above technical solution, the clamping blocks arranged vertically on the ground on both sides of the outer formwork can play a role in limiting the position when the outer formwork is clamped on the outside of the prefabricated wall panel. The structural design of the clamping block with a triangular cross-section can prevent the outer formwork from being laterally displaced after being installed on the prefabricated wall panel and thus being disconnected from the prefabricated wall panel.

[0025] In a second aspect, the present application provides a construction method for a prefabricated concrete structure, which uses the prefabricated concrete structure described above and adopts the following technical solution:

[0026] A construction method for an assembled concrete structure comprises the following steps:

[0027] Step 1, construction preparation, including the production and transportation of various prefabricated components, the selection of hoisting equipment and lifting equipment according to the shape, size, weight and operating radius of the prefabricated components, and the construction of their foundations;

[0028] Step 2: Building foundation construction;

[0029] Step 3, fix the temporary support I-beam on the building foundation, use the lifting equipment to lift the composite slab to the building foundation and cast concrete at the connection position;

[0030] Step 4: vertically hoist the prefabricated wall panels on the composite panels, and perform grouting at the connection positions. After the grouting is completed, use inclined supports to fix them;

[0031] Step 5: hoist and clamp the outer formwork at the connection of the prefabricated wall panels, support the inner formwork on the inside and cast the connecting blocks, and finally remove the inner formwork.

[0032] By adopting the above technical scheme, the advantages of short construction period and low material cost of partially assembled buildings can be brought into play, while the construction process can be simplified, the difficulty of construction operations can be reduced, and the purpose of the invention of improving the construction quality and construction efficiency of partially assembled buildings and reducing the difficulty of hoisting and grouting operations of prefabricated panels can be achieved.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The composite slab fixedly arranged in the horizontal direction in the present application can serve as the ground foundation and bear the role of the prefabricated wall panels. The prefabricated wall panels vertically installed on the composite slab can serve as wall panels to divide the space and make it a complete building. The cast-in-place section arranged at the connection between two adjacent prefabricated wall panels is a connection mechanism formed by pouring on-site after the prefabricated wall panels are installed, which ensures the bearing capacity of the connection part of the prefabricated wall panels. The horizontal structural ribs arranged in the horizontal direction of the composite slab improve the tensile strength of the composite slab, and the concrete plate body wrapped on the outside of the horizontal structural ribs improves the tensile strength of the composite slab. The compressive strength of the structure is improved. The longitudinal connecting ribs vertically penetrated on the plate body play the role of fixing and connecting the prefabricated wall panels. The structural design of the fixed connection between the longitudinal connecting ribs and the horizontal structural ribs further improves the tensile strength of the connection between the composite plate and the prefabricated wall panel. The grouting cone sleeved on the longitudinal connecting ribs can reduce the difficulty of grouting operation and improve the efficiency of grouting operation. The structural design of the rotatable connection between the grouting cone and the longitudinal connecting ribs simplifies the operation steps of the overall construction, and realizes the invention purpose of improving the construction quality and efficiency of partially assembled buildings and reducing the difficulty of hoisting and grouting operations of prefabricated panels in this application.

[0035] 2. The structural design in which the taper of the conical position of the connecting hole is greater than the taper of the grouting cone in the present application increases the remaining cavity volume after the grouting cone is inserted into the conical hole, reduces the grouting pressure, and makes the subsequent grouting operation easier to carry out. The structural design in which the ends of the two connecting holes that are far from the conical holes are interconnected reduces the number of grouting required for the fixed installation of the single-sided prefabricated wall panels, further improving the installation efficiency of the prefabricated wall panels. The structural design in which the connecting sections of the two connecting holes are annular can facilitate the circulation of slurry, reduce the grouting resistance, thereby reducing bubbles and improving the grouting quality.

[0036] 3. In the present application, the pads arranged along the length direction on the lower surface of the wall body play a buffering and shock-absorbing role in the hoisting process of the prefabricated wall panels. The structural design in which the thickness of the pads is consistent with the outer diameter length of the grouting pipe ensures that the prefabricated wall with the pad structure will not cause excessive squeezing of the grouting pipe during the hoisting process. The pad structure also plays a limiting role, which can reduce the difficulty of casting the formwork at the connection position of the prefabricated wall panel and the composite plate, and improve the installation efficiency of the prefabricated wall panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an assembled concrete structure disclosed in an embodiment of the present application.

[0038] Figure 2 It is a schematic diagram of the structure of the composite plate in an embodiment of the present application.

[0039] Figure 3 It is a schematic diagram of the structure of the grouting cone in the embodiment of the present application.

[0040] Figure 4 It is a schematic diagram of the cross-sectional structure of the prefabricated wall panel in the embodiment of the present application.

[0041] Figure 5 It is a schematic diagram of the structure of the limiting frame and the embedded plate in the embodiment of the present application.

[0042] Explanation of the reference numerals in the accompanying drawings: 1. Composite plate; 11. Horizontal structural ribs; 12. Plate body; 13. Longitudinal connecting ribs; 14. Grouting cone; 141. Grouting pipe; 2. Prefabricated wall panel; 21. Longitudinal structural ribs; 22. Wall body; 23. Horizontal connecting ribs; 221. Pads; 222. Limiting frame; 223. Embedded plate; 3. Cast-in-place section; 31. External formwork; 32. Connecting block; 311. Snap-in block. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1 -Attached Figure 5 This application is described in further detail.

[0044] Prefabricated concrete buildings refer to concrete structure buildings that are designed and constructed mainly by factory-produced prefabricated reinforced concrete components and assembled on site. Partially assembled buildings in prefabricated concrete buildings refer to buildings whose main components are generally prefabricated components, which are connected on site by cast-in-place concrete to form assembled integral structures. Since partially assembled buildings can have better structural strength while ensuring construction speed, they are more conducive to winter construction and have higher production efficiency than traditional steel-concrete structure construction. Prefabricated wall panels and foundations are usually fixedly connected by steel bar splicing and small hole grouting. However, the prefabricated plate structure makes the hoisting and hole alignment process relatively troublesome, and it is difficult to remove bubbles by traditional vibration after grouting. Grouting a large number of steel bar holes not only cannot guarantee the grouting quality, but also affects the overall construction efficiency. In order to improve the construction quality and construction efficiency of partially assembled buildings and reduce the difficulty of hoisting and grouting operations of prefabricated plates, the present application provides a prefabricated concrete structure and a construction method thereof.

[0045] In a first aspect, the present application discloses an assembled concrete structure. Figure 1 An assembled concrete structure includes a composite plate 1, a prefabricated wall panel 2 and a cast-in-place section 3. The composite plate 1 is fixedly arranged in a direction parallel to the ground, the prefabricated wall panel 2 is vertically fixedly arranged on the upper surface of the composite plate 1, and the corner positions of two adjacent prefabricated wall panels 2 are fixedly connected by the cast-in-place section 3.

[0046] Reference Figure 1 , Figure 2and Figure 3 The composite plate 1 includes horizontal structural ribs 11, a plate body 12, longitudinal connecting ribs 13 and a grouting cone 14. The horizontal structural ribs 11 may be a rectangular steel mesh formed by parallel arrangement of straight steel bars, vertical binding and welding. The plate body 12 may be a rectangular solid block made of concrete, which is cast and coated on the outside of the horizontal structural ribs 11. The longitudinal connecting ribs 13 may be short steel bar heads vertically welded on the horizontal structural ribs 11. The grouting cone 14 may be a hollow conical metal cylinder sleeved on the longitudinal connecting ribs 13. The grouting cone 14 is rotatably connected to the longitudinal connecting ribs 13. A grouting pipe 141 is provided at the bottom end of the grouting cone 14 in the horizontal direction. The grouting pipe 141 is connected to the grouting cone 14. A circular hole is provided on the side of the grouting cone 14 opposite to the side where the grouting pipe 141 is provided, serving as a grouting hole.

[0047] Reference Figure 1 , Figure 4 and Figure 5 The prefabricated wall panel 2 includes a longitudinal structural rib 21, a wall body 22 and a horizontal connecting rib 23. The longitudinal structural rib 21 may be a rectangular steel mesh formed by parallel arrangement of straight steel bars, vertical binding and welding. The wall body 22 may be a cuboid made of concrete, cast and coated on the outside of the longitudinal structural rib 21. The horizontal connecting rib 23 may be a C-shaped steel bar welded on the longitudinal structural rib 21 in the horizontal direction. A pad 221 is provided on the lower surface of the wall body 22 by integral casting. The thickness of the pad 221 is consistent with the outer diameter length of the grouting pipe 141. The pad 221 is arranged in parallel along the length direction of the wall body 22. A prefabricated window is provided in the middle of the wall body 22, and a limiting frame 222 is embedded in the edge of the prefabricated window. An embedded plate 223 is vertically welded on the outer surface of the limiting frame 222. The embedded plate 223 is clamped in the wall body 22. The number of the horizontal connecting ribs 23 is set to be multiple, and the multiple horizontal connecting ribs 23 are evenly and vertically distributed on the side surface of the wall 22 along the height direction of the wall 22.

[0048] Reference Figure 1 The cast-in-place section 3 includes an outer formwork 31 and a connecting block 32. The outer formwork 31 is provided with a triangular cross-section connecting block 311 on both sides in a direction perpendicular to the ground. The connecting block 311 of the outer formwork 31 is connected to the dovetail grooves provided in the vertical direction at both ends of the prefabricated wall panels 2. The connecting block 32 can be a cube made of concrete. The outer formwork 31 is covered on the outside of the connecting block 32, and the connecting block 32 is covered on the outside of the vertical connection of two adjacent prefabricated wall panels 2.

[0049] In a second aspect, the present application discloses a construction method of an assembled concrete structure, comprising the following steps:

[0050] Step 1, construction preparation, includes the production and transportation of various prefabricated components, the selection of hoists and lifting equipment according to the shape, size, weight and operating radius of the prefabricated components, and the construction of their foundations.

[0051] In this step, the order and time of entry of various equipment and panels should be coordinated in advance to maximize the use of the limited space on the site and reduce the impact of site layout on the construction period.

[0052] Step 2: Construction of building foundation.

[0053] In this step, construction should be carried out in combination with seasonal characteristics to reduce the impact of climate on the construction period. The construction process and prefabrication and material processing process should be carried out simultaneously to improve the utilization of construction time.

[0054] Step 3, fix the temporary supporting I-beam on the building foundation, use the lifting equipment to lift the composite slab 1 to the building foundation and cast concrete at the connection position.

[0055] During this step, the equipment and structures used for temporary support should be inspected regularly to ensure that the construction process is safe and efficient.

[0056] Step 4, vertically hoist the prefabricated wall panel 2 on the composite board 1, and perform grouting at the connection position. After the grouting is completed, use inclined supports to fix it.

[0057] In this step, it should be noted that the removal time of the inclined support must be later than the time required for the structural strength of the grouting material to reach the design strength requirement.

[0058] Step 5, hoist and clamp the outer formwork 31 at the connection of the prefabricated wall panel 2, and support the inner formwork on the inside and cast the connection block 32, and finally remove the inner formwork.

[0059] In this step, it should be noted that the removal time of the inner formwork must be later than the time required for the structural strength of the cast material of the cast-in-place section 3 to reach the design strength.

[0060] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An assembled concrete structure, characterized in that: The invention relates to a composite plate (1) arranged in a direction parallel to a bottom surface, a plurality of prefabricated wall panels (2) arranged vertically on the composite plate (1), and a cast-in-place section (3) arranged at the joint of two adjacent prefabricated wall panels (2); the composite plate (1) comprises horizontal structural ribs (11) overlapped in a horizontal direction, a plate body (12) wrapped around the outside of the horizontal structural ribs (11), a plurality of longitudinal connecting ribs (13) penetrating the plate body (12), and a plurality of grouting cones (14) sleeved on the longitudinal connecting ribs (13); the longitudinal connecting ribs (13) are perpendicular to the plane where the plate body (12) is located, and are fixedly connected to the horizontal structural ribs (11); the grouting cones (14) are connected to the plate body (12) and the longitudinal connecting ribs (13) are fixedly connected to the plate body (12). The longitudinal connecting ribs (13) are rotatably connected, and a grouting pipe (141) is provided in the horizontal direction; the prefabricated wall panel (2) comprises longitudinal structural ribs (21) overlapped in a direction perpendicular to the ground, a wall body (22) covering the outside of the longitudinal structural ribs (21), and a plurality of horizontal connecting ribs (23) provided on the side of the wall body (22); a connecting hole is provided at a position on the lower surface of the wall body (22) corresponding to the longitudinal connecting ribs (13); the position of the connecting hole close to the edge of the wall body (22) is a conical hole; the conical position of the connecting hole has a taper greater than the taper of the grouting cone (14); two connecting holes located on the same side are connected to each other at one end away from the conical hole, and the connecting section is annular.

2. The assembled concrete structure according to claim 1, characterized in that: The horizontal connecting ribs (23) are bent into a semi-circular shape, and a plurality of the horizontal connecting ribs (23) are evenly arranged along the height direction of the wall (22).

3. The assembled concrete structure according to claim 1, characterized in that: A cushion block (221) is provided on the lower surface of the wall (22) in the length direction, and the thickness of the cushion block (221) is consistent with the outer diameter length of the grouting pipe (141).

4. The assembled concrete structure according to claim 1, characterized in that: A prefabricated window is provided in the middle of the wall (22); a limiting frame (222) is embedded in the prefabricated window of the wall (22).

5. The assembled concrete structure according to claim 4, characterized in that: A plurality of embedded plates (223) are vertically disposed on the edge of the outer surface of the limiting frame (222); the embedded plates (223) are fixedly connected to the longitudinal structural ribs (21).

6. The assembled concrete structure according to claim 1, characterized in that: The cast-in-place section (3) comprises an outer formwork (31) that is clamped to the prefabricated wall panel (2) and a connection block (32) that is coated on the outside of the horizontal connection rib (23).

7. The assembled concrete structure according to claim 6, characterized in that: Both side edges of the outer template (31) are provided with clamping blocks (311) in a direction perpendicular to the ground; the cross section of the clamping blocks (311) is triangular.

8. A construction method of an assembled concrete structure, using an assembled concrete structure as claimed in claim 6, characterized in that: The following steps are involved: Step 1, construction preparation, including the production and transportation of various prefabricated components, the selection of hoisting equipment and lifting equipment according to the shape, size, weight and operating radius of the prefabricated components, and the construction of their foundations; Step 2: Building foundation construction; Step 3, fix the temporary support I-beam on the building foundation, use the lifting equipment to lift the composite slab (1) to the building foundation and cast concrete at the connection position; Step 4, vertically hoisting the prefabricated wall panel (2) on the composite panel (1), and grouting the connection position, and fixing it with an inclined support after the grouting is completed; Step 5, hoisting and clamping the outer formwork (31) at the connection of the prefabricated wall panel (2), and supporting the inner formwork on the inner side and casting the connection block (32), and finally removing the inner formwork.

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