A reverse construction method for a multi-story, large-span, mixed-structure factory building

Abstract

The present invention discloses a reverse construction method for a multi-story large-span mixed structure factory building, which belongs to the field of building construction technology. S1. Construct a concrete base plate, and construct a cavity column in the middle of the concrete base plate. After the construction of the cavity column in the middle of the concrete base plate is completed, the steel column is constructed from the middle of the concrete base plate to both ends at the same time; wherein, the cavity column includes the following construction steps: S10. Hoist the cavity column to the specified position on the concrete base plate by hoisting, and then adjust and control the aerial form of the cavity column by a posture control device; S2. After the construction of the cavity column and the steel column on the concrete base plate is completed, the multi-layer bottom concrete structure on the concrete base plate is cast; S3. After the construction of the multi-layer bottom concrete structure on the concrete base plate is completed, the roof structure on the cavity column and the steel column is constructed. This technical solution is used to improve the construction efficiency of multi-story large-span mixed structure factories.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a reverse construction method of a multi-story large-span mixed-structure factory building. Background Art

[0002] In the prior art, when constructing a multi-story and large-span mixed-structure factory building, the usual construction sequence is to first construct the concrete base plate, then construct the upper multi-story structure, and finally construct the roof structure; this construction process has the problem of a long construction period for the bottom concrete floor, a small construction work surface, and the core components such as the electromechanical system can only be constructed after the overall construction is completed, resulting in a long overall construction period. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a reverse construction method for a multi-story large-span mixed structure factory building, so as to improve the construction efficiency of the multi-story large-span mixed structure factory building.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a reverse construction method for a multi-story large-span mixed structure factory building, comprising the following construction steps:

[0006] S1. Construct the concrete base plate, then construct the cavity column in the middle of the concrete base plate. After the construction of the cavity column in the middle of the concrete base plate is completed, construct the steel columns from the middle of the concrete base plate to both ends at the same time;

[0007] The construction of the cavity column includes the following construction steps:

[0008] S10, hoisting the cavity column to a designated position on the concrete base plate, and then adjusting and controlling the air shape of the cavity column by a posture control device;

[0009] S11, connecting the bottom end of the cavity column and the concrete bottom plate through longitudinal reinforcement, and pouring early-strength concrete at the lower end of the cavity column after the connection is completed;

[0010] S12, finally pouring self-compacting concrete into the upper cavity of the cavity column;

[0011] S2. After the construction of the cavity columns and steel columns on the concrete bottom plate is completed, the multi-layer bottom concrete structure on the concrete bottom plate is poured;

[0012] S3. After the construction of the multi-layer bottom concrete structure on the concrete base plate is completed, the roof structure on the cavity columns and steel columns is constructed;

[0013] Among them, when constructing the roof structure, the following construction steps are included:

[0014] S30, dividing the construction area of ​​the part where the cavity columns and steel columns are arranged on the concrete bottom plate;

[0015] S31. Construction is carried out from the construction area in the middle of the concrete base plate to the construction areas on both sides, wherein the main trusses and secondary members in the roof structure in two adjacent construction areas are constructed alternately until the construction is completed.

[0016] Further, in step S1, the lifting equipment includes a crawler crane and a truck crane, wherein an exit channel for the crawler crane is reserved in advance on the concrete bottom plate, and the steel columns in the exit channel are installed after the crawler crane exits the site.

[0017] Further, in step S10, the posture control device includes a fixed plate, one side of the fixed plate is symmetrically provided with L-shaped legs, the other side of the fixed plate is symmetrically provided with at least one group of hydraulic rods, the output ends of the hydraulic rods are provided with U-shaped mounting blocks, one side of the U-shaped mounting blocks are provided with a rotating shaft, the rotating shaft is provided with a rotating rod, one end of the rotating rod is rotatably connected to the rotating shaft, and the other side of the U-shaped mounting block is provided with a limit pin, the limit pin is provided with a connecting rod, one end of the connecting rod and the limit pin are detachably connected, a U-shaped mounting plate is provided between the two groups of hydraulic rods, the two ends of the U-shaped mounting plate are respectively fixedly connected to the connecting rod and the rotating rod, a connecting column is provided in the middle of the U-shaped mounting plate, one end of the connecting column is located between the U-shaped mounting plate and the fixed plate, and is arranged vertically toward the fixed plate.

[0018] Furthermore, a wedge block is provided on the other end of the connecting rod and the rotating rod arranged above the fixed plate, and the inclined surfaces of the two wedge blocks are arranged opposite to each other.

[0019] Furthermore, the connecting column is threadedly connected to the U-shaped mounting plate.

[0020] Furthermore, a roller is provided on one end of the connecting column facing the fixed plate, and the roller is rotatably connected to the end of the connecting column.

[0021] Furthermore, a rotary bearing is provided on the roller, an outer ring of the rotary bearing is fixed on the roller, and an inner ring of the rotary bearing is fixed on the end of the connecting column.

[0022] Furthermore, the fixed plate is symmetrically provided with strip-shaped through grooves, a U-shaped baffle is provided in the strip-shaped through groove, both ends of the U-shaped baffle are slidably connected in the strip-shaped through groove, and the inner side surfaces of the two end portions of the U-shaped baffle are respectively in sliding contact with a side surface of the wedge block facing the hydraulic rod.

[0023] Furthermore, a plurality of universal wheels are provided on the surface of the L-shaped legs that contacts the concrete bottom plate.

[0024] The beneficial effects of the present invention are:

[0025] The present invention adopts a reverse construction method, that is, the multi-story large-span mixed structure factory building is constructed according to the following construction sequence, that is, first the concrete base plate is constructed - then the vertical independent columns are constructed - then the roof structure is constructed - finally the bottom multi-story concrete structure is constructed. This construction method can quickly form the main structure of the factory building, that is, the bottom concrete structure and the roof curtain wall can be constructed simultaneously from multiple construction interfaces, which is convenient for subsequent mechanical and electrical installation, and can also greatly improve the construction efficiency of the multi-story large-span mixed structure factory building.

[0026] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0028] Figure 1 It is a schematic diagram of the process of the reverse construction method in the present invention;

[0029] Figure 2 It is a plan view schematic diagram of dividing the construction area of ​​the construction site in the present invention;

[0030] Figure 3 It is a three-dimensional schematic diagram of the posture adjustment device in the present invention acting on the cavity column;

[0031] Figure 4 is a three-dimensional schematic diagram of the posture adjustment device in the present invention;

[0032] Figure 5 is a three-dimensional schematic diagram of the posture adjustment device of the present invention from another viewing angle;

[0033] Figure 6 It is a three-dimensional schematic diagram of the posture adjustment device of the present invention after the U-shaped mounting plate is rotated;

[0034] Figure 7 It is a schematic front view of the posture adjustment device in the present invention.

[0035] The following are marked in the accompanying drawings:

[0036] 1. Fixed plate; 2. L-shaped legs; 3. U-shaped baffle; 4. Hydraulic rod; 5. U-shaped mounting block; 6. Rotating shaft; 7. Rotating rod; 8. Wedge block; 9. U-shaped mounting plate; 10. Connecting column; 11. Roller; 12. Connecting rod; 13. Universal wheel; 14. Cavity column; 15. Concrete base plate; 16. Early-strength concrete setting block; 17. Limit pin; 18. Locking bolt. DETAILED DESCRIPTION

[0037] like Figure 1-Figure 7 As shown, the reverse construction method of a multi-story large-span mixed structure factory building of the present invention includes the following construction steps:

[0038] S1, construct the concrete base plate 15, and then construct the cavity column 14 in the middle of the concrete base plate 15. After the construction of the cavity column 14 in the middle of the concrete base plate 15 is completed, the steel column is constructed from the middle of the concrete base plate 15 to both ends at the same time; it is not difficult to understand that the cavity column 14 can be understood as a pipe with a rectangular cross-section and a hollow interior, and the steel column is a common I-shaped steel column;

[0039] The construction of the cavity column 14 includes the following construction steps:

[0040] S10, hoisting the cavity column 14 to a designated position on the concrete base plate 15, and then adjusting and controlling the air shape of the cavity column 14 by a posture control device;

[0041] S11, connecting the bottom end of the cavity column 14 and the concrete bottom plate 15 through longitudinal reinforcement, pouring early-strength concrete at the lower end of the cavity column 14 after the connection is completed to form an early-strength concrete solidification block 16, and when the cavity column 14 is connected to the concrete bottom plate 15, the end of the cavity column 14 is also blocked to facilitate pouring self-compacting concrete therein;

[0042] S12, finally pouring self-compacting concrete into the upper cavity of the cavity column 14;

[0043] Prefabricated cavity columns 14 are used, and quick connections and internal concrete pouring are adopted to achieve rapid construction; the cavity columns 14 reduce the hoisting weight, improve the bearing capacity and stiffness of the columns after construction, and meet the force requirements of the entire reverse construction process of the concrete base plate 15 diverging from the middle to the outside.

[0044] S2. After the construction of the cavity column 14 and the steel column on the concrete bottom plate 15 is completed, the multi-layer bottom concrete structure on the concrete bottom plate 15 is poured;

[0045] S3. After the multi-layer bottom concrete structure on the concrete bottom plate 15 is constructed, the roof structure on the cavity column 14 and the steel column is constructed;

[0046] Among them, when constructing the roof structure, the following construction steps are included:

[0047] S30, dividing the construction area of ​​the part where the cavity columns 14 and the steel columns are arranged on the concrete base plate 15;

[0048] S31, diverging construction is performed from the construction area in the middle of the concrete bottom plate 15 to the construction areas on both sides, wherein the main trusses and secondary members in the roof structure in two adjacent construction areas are alternately constructed until the construction is completed.

[0049] In one practicable manner, in step S1, the lifting equipment includes a crawler crane and a truck crane, wherein an exit channel for the crawler crane is reserved in advance on the concrete base plate 15, and the steel columns in the exit channel are installed after the crawler crane exits the site.

[0050] For ease of understanding, Figure 1 and Figure 2 As shown, the specific embodiments of the above construction method are as follows:

[0051] Specifically, Figure 2 The construction site (concrete base plate 15) is divided into construction areas. The specific method of division is to divide the construction site in the length and width directions, such as Figure 2 The dividing axis 1-40 of the length of the century, and the dividing axis AJ of the width side, it is not difficult to understand that the installation positions of the cavity column 14 and the steel column are located on the axis.

[0052] The specific construction process is:

[0053] (1) The prefabricated cavity columns 14 of the 13th to 23rd axes are hoisted and connected to the bottom plate. After the early-strength concrete strength reaches the required level, self-compacting concrete is poured in the cavity in sequence;

[0054] (2) Lift the steel columns of axis 1 to axis 12 and axis 23 to axis 35. The area of ​​axis 33 is used as the exit channel of the crawler crane. The steel columns are built later and the truss assembly starts at the same time;

[0055] (3) Lifting of the vertical supports and inter-support structures of shafts 17 to 19, and the segmented lifting of the main trusses of shafts 17 to 19;

[0056] (4) Segmental lifting of the main trusses of shafts 14 to 16 and shafts 20 to 22, and the lifting of secondary components of shafts 17 to 19;

[0057] (5) Segmental lifting of the main trusses of shafts 7 to 13 and shafts 23 to 29, and the lifting of secondary components of shafts 14 to 16 and shafts 20 to 22;

[0058] (6) The main trusses of axes 1 to 6 and axes 30 to 35 are hoisted in sections, and the secondary components of axes 7 to 13 and axes 23 to 29 are hoisted, of which the steel structure of the area of ​​axes 33 to 35 is installed later;

[0059] (7) The components of axles 1 to 6 are hoisted, the crawler crane is removed from the site, the main trusses of axles 34 to 35 are set up, and the components are hoisted by a truck crane, thus completing the construction process of the overall frame.

[0060] In summary, the construction sequence of this method is: construction of the concrete base plate 15 - construction of vertical independent columns (cavity columns 14 and steel columns) - construction of the roof structure - bottom 1 layer concrete structure - bottom 2 layer concrete structure, which can quickly form the main structure, and then simultaneously construct the bottom concrete structure and the roof curtain wall at multiple construction interfaces to facilitate subsequent mechanical and electrical installation.

[0061] In one practicable manner, in step S10, the posture control device includes a fixed plate 1, one side of the fixed plate 1 is symmetrically provided with an L-shaped leg 2, the vertical plate of the L-shaped leg 2 is fixed to the fixed plate 1 by a locking bolt 18, and at least one group of hydraulic rods 4 is symmetrically provided on the other side of the fixed plate 1 (arranged opposite to the L-shaped leg 2), such as Figure 3 As shown, the number of hydraulic rods 4 is 4 groups, and U-shaped mounting blocks 5 are provided on the output ends of the hydraulic rods 4. A rotating shaft 6 is provided in the U-shaped mounting blocks 5 on one side, and a rotating rod 7 is provided on the rotating shaft 6. One end of the rotating rod 7 is rotatably connected to the rotating shaft 6. A limiting pin 17 is provided in the U-shaped mounting block 5 on the other side, and a connecting rod 12 is provided on the limiting pin 17. One end of the connecting rod 12 is detachably connected to the limiting pin 17. A U-shaped mounting plate 9 is provided between the two groups of hydraulic rods 4. Both ends of the U-shaped mounting plate 9 are fixedly connected to the connecting rod 12 and the rotating rod 7 respectively. A connecting column 10 is provided in the middle of the U-shaped mounting plate 9, and one end of the connecting column 10 is located between the U-shaped mounting plate 9 and the fixed plate 1, and is arranged vertically toward the fixed plate 1.

[0062] The working principle of the above technical solution is:

[0063] When the cavity column 14 is hoisted above the installation position, due to vertical hoisting, the hoisting point is located at the higher end of the cavity column 14, and during hoisting, the cavity column 14 is easy to shake and cannot be accurately lowered to the installation position. At this time, the limit pin 17 is removed, and the U-shaped mounting plate 9 is rotated to the other end, that is, the middle position of the fixing plate 1 is released, and then the cavity column 14 is located in the middle of the fixing plate 1, and then the other end of the U-shaped mounting plate 9 is reset, and the connecting rod 12 is connected to the fixing plate 1 with the limit pin 17. At the output end of the hydraulic rod 4, it is only necessary to control the hydraulic rod 4 to retract, and the cavity column 14 can be pressed against the fixed plate 1 through the end of the connecting column 10. Since the fixed plate 1 is vertically arranged, the cavity column 14 is also in a vertical state at this time, and the shaking of the lower end of the cavity column 14 is restricted at this time, that is, it is only necessary to slowly lower the cavity column 14 with a lifting device. Under the action of gravity, the position of the cavity column 14 at the bottom is relatively fixed, that is, it is more convenient to place and install it accurately.

[0064] In one feasible manner, a wedge block 8 is provided on the other end of the connecting rod 12 and the rotating rod 7 arranged above the fixed plate 1, and the inclined surfaces of the two wedge blocks 8 are arranged opposite to each other. The retraction of the hydraulic rod 4 will drive the wedge block 8 to move, that is, the inclined surface of the wedge block 8 and the side surface of the cavity column 14 will gradually contact during the movement, and at the same time, the cavity column 14 will be pushed toward the middle of the fixed plate 1 until the wedge blocks 8 on both sides press it tightly. At this time, the cavity column 14 is located in the middle position of the fixed plate 1, and the position of the cavity column 14 is further limited, that is, it is only necessary to align the middle of the fixed plate 1 with the installation position before adjusting the position of the cavity column 14. Then, when the cavity column 14 is lowered, it can directly fall to the installation position without the need for subsequent construction personnel to move the L-shaped leg 2 to adjust the position of the cavity column 14.

[0065] In one feasible manner, the connecting column 10 is threadedly connected to the U-shaped mounting plate 9, and the timing of its contact with the cavity column 14 can be adjusted by adjusting the length of the connecting column 10, that is, adjusting the movement distance of the hydraulic rod 4, that is, adjusting the movement distance of the wedge block 8, that is, adjusting the distance moved when the wedge block 8 and the cavity column 14 are pressed and positioned, thereby making the posture control device suitable for cavity columns 14 with different length-width ratios. Of course, the posture control device is also suitable for posture adjustment of steel columns.

[0066] In one feasible manner, a roller 11 is provided on one end of the connecting column 10 facing the fixed plate 1, and the roller 11 is rotatably connected to the end of the connecting column 10. A rotating bearing is provided on the roller 11, and the outer ring of the rotating bearing is fixed on the roller 11, and the inner ring of the rotating bearing is fixed on the end of the connecting column 10. The setting of the roller 11 can reduce the friction force of the cavity column 14 when it slides down, thereby improving the effect of its slow sliding down (the hoisting equipment slowly moves down to achieve the slow sliding down of the cavity column 14).

[0067] In one feasible manner, strip through grooves are symmetrically provided on the fixed plate 1, and a U-shaped baffle 3 is provided in the strip through groove. Both ends of the U-shaped baffle 3 are slidably connected in the strip through groove, and the inner side surfaces of the two end portions of the U-shaped baffle 3 are respectively in sliding contact with the side surface of the wedge block 8 facing the hydraulic rod 4. Since the side of the wedge block 8 opposite to the inclined surface is a plane, its position is relatively fixed, that is, the movement trend of the wedge block 8 toward the hydraulic rod 4 is blocked by the contact support of the U-shaped baffle 3, that is, the lateral reaction force when the wedge block 8 is pressed tightly acts on the output end of the hydraulic rod 4, resulting in the problem of radial force damage to the hydraulic rod 4. Of course, a limit assembly can also be provided on the U-shaped baffle 3 to prevent it from sliding on the fixed plate 1 when blocking the wedge block 8, resulting in the problem of sliding out.

[0068] In one feasible manner, a plurality of universal wheels 13 are provided on the surface of the L-shaped leg 2 that contacts the concrete base plate 15. The universal wheels 13 are provided mainly to facilitate workers to push the posture control device to a specified position. At the same time, they can also be rotated to a certain extent to further adjust the relative angle between the cavity column 14 and the installation position, thereby further improving the installation accuracy and convenience. It is not difficult to understand that a counterweight should be provided on the L-shaped leg 2, or a conical plug rod fixed to the concrete base plate 15, etc., to avoid the problem that the pre-set position of the posture control device is destroyed due to collision with the cavity column 14 or lateral thrust.

[0069] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A reverse construction method for a multi-story, large-span, mixed-structure factory building, characterized by: The construction steps include: S1, constructing a concrete base plate (15), and then constructing a cavity column (14) at the middle of the concrete base plate (15). After the construction of the cavity column (14) at the middle of the concrete base plate (15) is completed, the steel columns are constructed from the middle of the concrete base plate (15) to both ends at the same time; The construction of the cavity column (14) includes the following construction steps: S10, hoisting the cavity column (14) to a designated position on the concrete base plate (15), and then adjusting and controlling the aerial form of the cavity column (14) by a posture control device; S11, connecting the bottom end of the cavity column (14) and the concrete bottom plate (15) via longitudinal reinforcement, and after the connection is completed, pouring early-strength concrete at the lower end of the cavity column (14); S12, finally pouring self-compacting concrete into the upper cavity of the cavity column (14); S2. After the construction of the cavity columns (14) and the steel columns on the concrete base plate (15) is completed, the multi-layer bottom concrete structure on the concrete base plate (15) is poured; S3. After the construction of the multi-layer bottom concrete structure on the concrete bottom plate (15) is completed, the roof structure on the cavity column (14) and the steel column is constructed; Among them, when constructing the roof structure, the following construction steps are included: S30, dividing the construction area of ​​the portion on the concrete base plate (15) where the cavity columns (14) and the steel columns are arranged; S31, performing divergent construction from the construction area in the middle of the concrete base plate (15) to the construction areas on both sides, wherein the main trusses and secondary members of the roof structure in two adjacent construction areas are alternately constructed until the construction is completed; In step S10, the posture control device comprises a fixed plate (1), one side of the fixed plate (1) is symmetrically provided with an L-shaped support leg (2), the other side of the fixed plate (1) is symmetrically provided with at least one group of hydraulic rods (4), the output ends of the hydraulic rods (4) are each provided with a U-shaped mounting block (5), one side of the U-shaped mounting block (5) is provided with a rotating shaft (6), the rotating shaft (6) is provided with a rotating rod (7), one end of the rotating rod (7) is rotatably connected to the rotating shaft (6), and the other side of the U-shaped mounting block (5) is provided with a limit stop A pin (17) is provided on the limit pin (17), one end of the connection rod (12) is detachably connected to the limit pin (17), a U-shaped mounting plate (9) is provided between the two groups of hydraulic rods (4), the two ends of the U-shaped mounting plate (9) are respectively fixedly connected to the connection rod (12) and the rotating rod (7), a connecting column (10) is provided in the middle of the U-shaped mounting plate (9), one end of the connection column (10) is located between the U-shaped mounting plate (9) and the fixed plate (1), and is arranged vertically toward the fixed plate (1).

2. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 1 is characterized by: In step S1, the lifting equipment includes a crawler crane and a truck crane, wherein an exit channel for the crawler crane is reserved in advance on the concrete base plate (15), and the steel columns in the exit channel are installed after the crawler crane leaves the site.

3. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 1 is characterized by: A wedge block (8) is provided on the other end of the connecting rod (12) and the rotating rod (7) arranged above the fixed plate (1), and the inclined surfaces of the two wedge blocks (8) are arranged opposite to each other.

4. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 1 is characterized by: The connecting column (10) is threadedly connected to the U-shaped mounting plate (9).

5. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 2 is characterized by: A roller (11) is provided on one end of the connecting column (10) facing the fixed plate (1), and the roller (11) is rotatably connected to the end of the connecting column (10).

6. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 5 is characterized by: A rotary bearing is provided on the roller (11), the outer ring of the rotary bearing is fixed on the roller (11), and the inner ring of the rotary bearing is fixed on the end of the connecting column (10).

7. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 3 is characterized by: The fixing plate (1) is symmetrically provided with strip-shaped through grooves, a U-shaped baffle (3) is provided in the strip-shaped through groove, both ends of the U-shaped baffle (3) are slidably connected in the strip-shaped through groove, and the inner side surfaces of the two end portions of the U-shaped baffle (3) are respectively in sliding contact with a side surface of the wedge block (8) facing the hydraulic rod (4).

8. The reverse construction method of a multi-story, large-span, hybrid structure factory building according to claim 1 is characterized by: A plurality of universal wheels (13) are provided on the surface of the L-shaped legs (2) that contacts the concrete bottom plate (15).

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