Connecting joint for low-multilayer box-type concrete structure house and construction method of connecting joint

Abstract

The invention discloses a connecting joint for a low multi-layer box type concrete structure house and a construction method thereof, and relates to the technical field of constructional engineering, the connecting joint comprises a bottom foundation and a plurality of layers of box bodies, the first layer of box body is connected with the bottom foundation, an embedded steel plate is arranged in the bottom foundation and connected with H-shaped steel, the H-shaped steel is arranged in the box bodies, and the first layer of box body is connected with the first layer of box body; vertical steel bars in the box body are connected with the H-shaped steel in a welded mode. According to the connecting joint for the low-multilayer box-type concrete structure house and the construction method of the connecting joint, the anti-seismic performance is guaranteed, and on the premise that the overall stress performance of the structure is guaranteed, the stress solution connecting structure is simple, force transmission is direct, and stress is definite. Loads and effects borne by all the components have reliable continuous transmission paths which are transmitted to the foundation. Secondary formwork erecting is not needed at the joints, only grouting material filling is conducted, after-treatment saves resources, the construction difficulty is lowered, the construction period progress is accelerated, and safety and reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, in particular to a connection node for a low-rise and multi-story box-type concrete structure house and a construction method thereof. Background Art

[0002] At present, most of the prefabricated low-rise box-type concrete structure houses have the following design defects and deficiencies:

[0003] 1. Inadequate seismic performance. Currently, most low-rise, multi-story, box-type concrete structures lack joints or have poorly designed joints and structures. This fails to ensure component continuity and overall structural stability, nor does it guarantee the necessary load-bearing capacity, rigidity, and ductility, nor the ability to resist wind, earthquakes, and accidental loads. The structural system is prone to progressive collapse at any time, and safety cannot be guaranteed.

[0004] 2. Secondary formwork and concrete pouring are required at the nodes, and subsequent processing is time-consuming and labor-intensive. Summary of the Invention

[0005] The purpose of the present invention is to provide a connection node for low-rise and multi-story box-type concrete structure houses and a construction method thereof, so as to solve the problems of insufficient seismic performance and time-consuming post-processing of concrete structure connection nodes in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a connection node for low-rise and multi-story box-type concrete structure houses, comprising a bottom foundation and a box body, wherein the box body is provided with multiple layers, a layer of the box body is connected to the bottom foundation, an embedded steel plate is provided in the bottom foundation, the embedded steel plate is connected to an H-shaped steel, the H-shaped steel is provided inside the box body, and the vertical steel bars inside the box body are welded to the H-shaped steel.

[0007] Preferably, the embedded steel plate is provided on the top of the first-layer box body, and the embedded steel plate connects the first-layer box body and the second-layer box body, and the reserved steel bars at the corners of the second-layer box body and the first-layer box body both extend out of the box body.

[0008] Preferably, a corner reserved corrugated pipe is provided outside the corner reserved steel bar, and grouting is performed between the corner reserved corrugated pipe and the corner reserved steel bar.

[0009] Preferably, the boxes are horizontally connected via embedded steel boxes, the embedded steel boxes are arranged at the same level inside the boxes on the same floor, and the embedded steel boxes are connected via M16 screws and M16 bolts.

[0010] Preferably, a chute is provided between the box and the adjacent wall.

[0011] A construction method for a connection node for a low-rise and multi-story box-type concrete structure house comprises the following steps:

[0012] S1. Pre-embed steel plates of corresponding specifications at the bottom of the foundation, and pre-embed two H-shaped steels at the corner columns of the first-floor box. The H-shaped steels are welded to two vertical steel bars, and connected and fixed by welding;

[0013] S2. Connection between the first and second floor boxes: Embed a pre-buried steel plate of the required specifications on the top of the first floor box, extend four steel bars at the corners, embed H-shaped steel at the bottom hidden columns of the first and second floors, and weld the H-shaped steel to the pre-buried steel plate when connecting the boxes;

[0014] S3. The horizontal connection between the boxes is made by pre-buried steel box casings. The two adjacent walls on the same straight line are pre-buried with connecting box casings at the same height, and then M16 screws are inserted and connected with M16 bolts;

[0015] S4. When prefabricating adjacent walls between boxes, vertical chute treatment is carried out, and the groove size is 50*15mm. After the splicing is completed, the grouting material is grouting the joint surface to connect.

[0016] Preferably, the four steel bars at the corners of the 4-6-story building in S2 are wrapped with a corrugated pipe reserved for the corners, and the four steel bars at the lower corners are inserted into the upper corrugated pipe and grouted.

[0017] Preferably, for buildings with fewer than three floors, the vertical connections between the boxes are made using only H-shaped steel connections. For buildings with four to six floors, the vertical connections between the boxes are made using bellows connections in addition to the steel connections.

[0018] Therefore, the present invention adopts the above-mentioned connection node for low-rise and multi-story box-type concrete structure houses and the construction method thereof, which has the following beneficial effects:

[0019] (1) Ensure seismic performance, component continuity, and overall structural stability. Ensure the structure has the necessary bearing capacity, rigidity, and ductility, as well as good resistance to wind, earthquakes, and accidental loads. Under the premise of ensuring the overall structural load-bearing performance, the connection structure should be simple, the force transmission should be direct, and the force should be clear. The loads and effects borne by all components should have a reliable continuous transmission path to the foundation. Avoid the continuous collapse of the structural system and ensure safety.

[0020] (2) No secondary formwork is required at the nodes, only grouting is required. Post-processing saves resources, reduces construction difficulty, speeds up construction progress, and is safe and reliable.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of an embodiment of a connection node for a low-rise and multi-story box-type concrete structure house according to the present invention;

[0023] Figure 2 This is a schematic structural diagram of a connection node specimen for a low-rise and multi-story box-type concrete structure house according to the present invention;

[0024] Reference numerals

[0025] 1. Box body; 2. Embedded steel plate; 3. M16 screw; 4. Embedded steel box; 5. Vertical steel bars; 6. Reserved steel bars at corners; 7. Reserved corrugated pipes at corners. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] Example

[0029] See also Figure 1-Figure 2 The present invention provides a connection node for a low-rise and multi-story box-type concrete structure house, including a bottom foundation and a box body 1. The box body 1 is provided with multiple layers, and one layer of the box body 1 is connected to the bottom foundation. An embedded steel plate 2 is provided in the bottom foundation, and the embedded steel plate 2 is connected to the H-shaped steel. The H-shaped steel is provided inside the box body 1, and the vertical steel bars 5 inside the box body are welded to the H-shaped steel.

[0030] An embedded steel plate 2 is provided on the top of the first-layer box body, which connects the first-layer box body and the second-layer box body. The reserved corner steel bars 6 of the second-layer box body and the first-layer box body extend out of the box body 1. The reserved corner steel bars 6 are provided at the corners. A reserved corner corrugated pipe 7 is provided on the outside of the reserved corner steel bars 6. Grouting is performed between the reserved corner corrugated pipe 7 and the reserved corner steel bars 6.

[0031] The boxes are connected horizontally via embedded steel boxes 4, which are placed at the same level within the boxes 1 on different levels. These boxes are connected via M16 screws 3 and M16 bolts. The steel boxes 4 are embedded at the same height on two adjacent walls in the same straight line, and then the M16 screws 3 are inserted to connect them.

[0032] A chute is provided between the box 1 and the adjacent wall, and the slot size is 50*15mm. After the splicing is completed, the grouting material is injected into the joint surface for connection.

[0033] A construction method for a connection node for a low-rise and multi-story box-type concrete structure house comprises the following steps:

[0034] S1. Pre-embed a steel plate 2 of corresponding specifications at the bottom of the foundation, and pre-embed an H-shaped steel at the corner column of the first-floor box. The H-shaped steel and two vertical steel bars 5 are welded and fixed by welding.

[0035] S2. Connections between the foundation and the first-floor enclosure, and between the first-floor enclosure and the second-floor enclosure: Embed a pre-buried steel plate 2 of the appropriate specification on the top of the foundation and the first-floor enclosure. Extend the four reserved corner steel bars 6. Embed H-shaped steel in the concealed columns at the bottom of the first and second floors. Reserve corrugated pipes 7 at the corners and wrap around the four reserved corner steel bars 6. When connecting enclosures 1, weld the H-shaped steel to the pre-buried steel plate 2. Insert the four lower-floor corner steel bars into the upper-floor corrugated pipes and perform grouting. Enclosures on floors 1-3 only use H-shaped steel for connection. Enclosures on floors 4-6 use metal corrugated pipes in addition to the steel connections.

[0036] The horizontal connection between S3 and the box 1 is made by embedding a steel box 4. The two adjacent walls on the same straight line are embedded with a connection box sleeve at the same height, and then the M16 screw 3 is inserted to make the connection.

[0037] S4. When the adjacent walls between the boxes 1 are prefabricated, vertical chute treatment is performed, and the groove size is 50*15mm. After the splicing is completed, the grouting material is grouting the joint surface to connect.

[0038] Therefore, the present invention adopts the above-mentioned connection node for low-rise and multi-story box-type concrete structure houses and its construction method to ensure earthquake resistance, the continuity of components and the overall stability of the structure, and ensure that the structure has the necessary bearing capacity, rigidity and ductility, as well as good wind resistance, earthquake resistance and resistance to accidental loads. Under the premise of ensuring the overall stress performance of the structure, the connection structure should be simple, the force transmission should be direct, and the force should be clear. The loads and effects borne by all components should have a reliable continuous transmission path to the foundation. Continuous collapse of the structural system is avoided and safety is guaranteed. No secondary formwork is required at the nodes, only grouting is carried out, and the post-processing saves resources, reduces the construction difficulty, speeds up the construction schedule, and is safe and reliable.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A connection node for low-rise and multi-story box-type concrete structure houses, characterized by: It includes a bottom foundation and a box body, the box body is provided with multiple layers, one layer of the box body is connected to the bottom foundation, an embedded steel plate is provided in the bottom foundation, the embedded steel plate is connected to the H-shaped steel, the H-shaped steel is provided inside the box body, and the vertical steel bars inside the box body are welded to the H-shaped steel.

2. The connection node for a low-rise and multi-story box-type concrete structure house according to claim 1, characterized in that: The embedded steel plate is provided on the top of the first-layer box body, and the embedded steel plate connects the first-layer box body and the second-layer box body. The reserved steel bars at the corners of the second-layer box body and the first-layer box body both extend out of the box body.

3. The connection node for a low-rise and multi-story box-type concrete structure house according to claim 2, characterized in that: A corner reserved corrugated pipe is arranged outside the corner reserved steel bar, and grouting is performed between the corner reserved corrugated pipe and the corner reserved steel bar.

4. The connection node for a low-rise and multi-story box-type concrete structure house according to claim 3, characterized in that: The boxes are horizontally connected by embedded steel boxes, which are arranged at the same level inside the boxes on the same floor. The embedded steel boxes are connected by M16 screws and M16 bolts.

5. The connection node for a low-rise and multi-story box-type concrete structure house according to claim 4, characterized in that: A chute is provided between the box and the adjacent wall.

6. A construction method for a connection node for a low-rise and multi-story box-type concrete structure building using any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Pre-embed steel plates of corresponding specifications at the bottom of the foundation, and pre-embed two H-shaped steels at the corner columns of the first-floor box. The H-shaped steels are welded to two vertical steel bars, and connected and fixed by welding; S2. Connection between the first and second floor boxes: Embed a pre-buried steel plate of the required specifications on the top of the first floor box, extend four steel bars at the corners, embed H-shaped steel at the bottom hidden columns of the first and second floors, and weld the H-shaped steel to the pre-buried steel plate when connecting the boxes; S3. The horizontal connection between the boxes is made by pre-buried steel box casings. The two adjacent walls on the same straight line are pre-buried with connecting box casings at the same height, and then M16 screws are inserted and connected with M16 bolts; S4. When prefabricating adjacent walls between boxes, vertical chute treatment is carried out, and the groove size is 50*15mm. After the splicing is completed, the grouting material is grouting the joint surface to connect.

7. The construction method of a connection node for a low-rise and multi-story box-type concrete structure house according to claim 6, characterized in that: The four steel bars at the corners of the 4th to 6th floor buildings in S2 are wrapped with corrugated pipes reserved for the corners, and the four steel bars at the lower corners are inserted into the upper corrugated pipes and grouted.

8. The construction method of a connection node for a low-rise and multi-story box-type concrete structure house according to claim 7, characterized in that: For buildings with less than three floors, the vertical connections between boxes are only made with H-shaped steel connections. For buildings with four to six floors, the vertical connections between boxes are made with corrugated pipe connections in addition to the steel connections.

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