Device for catenary type prestressed roof steel strand installation and linear control and construction method

Abstract

The invention provides a device for catenary type prestressed roof steel strand installation and linear control and a construction method.The device for catenary type prestressed roof steel strand installation and linear control comprises a device body round rod frame, a plurality of body stand columns are installed on the lower portion of the device body round rod frame, the body stand columns are installed on a body square frame, and body threaded holes are formed in the four corners of the body square frame; an adjustable control device telescopic suspender is in threaded connection with the interior of each main body threaded hole, the lower ends of the adjustable control device telescopic suspenders are connected to the four corners of a steel strand bearing device respectively, and a steel strand is placed on the steel strand bearing device and fixed through a binding wire; an adjustable control device pull rod is further connected to the device body round rod frame in a clamped mode, and the other end of the adjustable control device pull rod is buckled to the longitudinal steel bars or the transverse steel bars or the stirrups. According to the invention, the accuracy of the installation rise point and position of the steel strand can be ensured, the stability and reliability of the overall line shape of the steel strand are ensured, and the problems of displacement and line shape change caused by gravity of the steel strand in a catenary form under a great height difference are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of prestressed construction, and in particular relates to a device and a construction method for installing and linearly controlling a catenary prestressed roof steel strand. Background Art

[0002] As the number of domestic public construction and infrastructure projects gradually decreases, the shape and structure of new projects are gradually shifting towards high standards and special features. Large cantilevers, large spans, catenary structures, etc. are gradually increasing, and the use of supporting prestressed technology is also increasing accordingly; however, the problem of deformation of the curved roof steel strands with large height differences at both ends under the influence of height differences and gravity still exists, especially for catenary roof structures.

[0003] The height difference between the two ends of the X-direction prestressed tendons of the catenary hollow slab is about 14.25m, and the length of a single tendon is about 44m. Under the influence of the height difference of the steel strands and gravity, the linear shape is very easy to change and difficult to maintain. At the same time, the positioning and binding of the prestressed tendons require more steel support legs, which conflicts with the binding of the existing floor slab steel bars, making construction difficult and increasing the construction cost.

[0004] In order to solve the above problems, the present invention designs a device and a construction method for installing and linearly controlling catenary prestressed roof steel strands. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a device and construction method for the installation and linear control of catenary prestressed roof steel strands, which effectively solves the problems of the current catenary prestressed roof steel strands being difficult to maintain linear shape during installation, difficult construction, and high cost.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A device for installing and linearly controlling catenary prestressed roof steel strands comprises a device main body round rod frame, a plurality of main body columns are connected below the device main body round rod frame, the main body columns are all mounted on the main body square frame, and main body threaded holes are provided at the four corners of the main body square frame; the main body square frame is threadedly connected to four adjustable control device telescopic booms, and the lower parts of the adjustable control device telescopic booms are connected to the steel strand support device; the strands are installed in the steel strand support device and fixed by binding wire; the device main body round rod frame is clamped and mounted with an adjustable control device pull rod, and the other end of the adjustable control device pull rod is clamped and mounted on the steel bars of the catenary prestressed roof.

[0008] Furthermore, the main body round rod frame, the main body column and the main body square frame of the device are integrally die-casted with steel.

[0009] Further, the adjustable control device pull rod is made of steel bar into a structure with hooks at both ends, the lower end hook is buckled on the device body round rod frame and can slide freely, the upper end is buckled on the steel of catenary prestressed roof.

[0010] Further, the adjustable control device telescopic boom includes telescopic boom threaded end, telescopic boom smooth end, telescopic boom tail end plug, telescopic boom tail end buckle; the telescopic boom threaded end is screwed into the main body threaded hole and the length is adjusted by rotating, the lower part of the telescopic boom smooth end is provided with a ring of protrusions, the protrusions are provided with a circular and freely rotating telescopic boom tail end plug, the telescopic boom tail end plug is welded with telescopic boom tail end buckle below, the telescopic boom tail end buckle is buckled into the four corner holes of the steel strand supporting device.

[0011] Further, the steel strand supporting device is made of steel coil with holes at four corners and has an arc structure.

[0012] A catenary prestressed roof steel strand installation and linear control construction method using a device for catenary prestressed roof steel strand installation and linear control, comprising the following processes: S1: catenary prestressed roof formwork and support installation construction; S2: after the catenary prestressed roof formwork and support acceptance is completed, the installation of longitudinal steel, transverse steel and stirrup is carried out in turn; S3: prestressed professional drawing is deepened, the steel strand vector height point is calculated according to the deepening content, and the lofting mark is placed at the formwork and steel position; S4: the assembly of the device for catenary prestressed roof steel strand installation and linear control is carried out, the steel strand supporting device and the main body square frame are connected by the adjustable control device telescopic boom, and the adjustable control device pull rod bottom is buckled on the device body round rod frame; S5: combined with the lofting vector height point position, the adjustable control device pull rod upper part is buckled on the corresponding steel at the appropriate position, the overall device is coarsely adjusted, and the steel strand supporting device is initially rechecked for elevation; S6: the adjustable control device telescopic boom is rotated, the length of its penetration into the main body threaded hole is adjusted to accurately position the steel strand supporting device, and the elevation and position are determined by the equipment and instruments; S7: the steel strand anchoring end is made and is threaded, the steel strand is placed on the adjustable control device, and is fixed by binding with wire, the linear and position of the steel strand are rechecked; S8: concrete pouring, vibrating and curing are carried out; S9: after the concrete reaches the design strength, prestressed tensioning and anchoring sealing construction are carried out; S10: the construction is completed, and the formwork and support are removed.

[0013] The present invention has the following beneficial effects: The present invention can ensure the accuracy of the installation sagittal point and position of the steel strand and the firm binding of the steel strand through the adjustment of the adjustable control device, ensure the stability and reliability of the overall linear shape of the steel strand, and solve the problems of steel strand displacement and linear change caused by gravity under extremely high height differences in the catenary form of the steel strand; at the same time, it can be used and fixed quickly and conveniently, effectively solving the problem of poor subsequent tensioning construction quality caused by deformation and displacement of the steel strand, thereby improving the overall construction quality of the roof panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a rendering of the catenary prestressed roof structure of the present invention; Figure 2 This is an installation effect diagram of the steel strand installation and linear control device of the present invention; Figure 3 This is a structural diagram of the steel strand installation and linear control device of the present invention; Figure 4 This is a main structural diagram of the adjustable control device of the present invention; Figure 5 This is a detailed structural diagram of the telescopic boom of the adjustable control device of the present invention; Figure 6 The present invention is a flow chart of the installation and linear control construction process of the catenary prestressed roof steel strand.

[0015] In the figure, 1. longitudinal reinforcement; 2. steel strand; 3. adjustable control device; 301 adjustable control device body; 3011. device body round rod frame; 3012. main body threaded hole; 3013. main body column; 3014. main body frame; 302. adjustable control device pull rod; 303. adjustable control device telescopic boom; 3031. telescopic boom threaded end; 3032. telescopic boom smooth end; 3033. telescopic boom tail end sealing; 3034. telescopic boom tail end buckle; 304. steel strand supporting device; 4. concrete; 5. transverse reinforcement; 6. stirrups; 7. wire tying. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0017] like Figures 1 to 5 As shown, the device for installing and linearly controlling the catenary prestressed roof steel strand of the present invention includes a longitudinal steel bar 1, an adjustable control device 3, concrete 4, a transverse steel bar 5, and stirrups 6.

[0018] like Figure 2 、 3As shown, the adjustable control device 3 comprises an adjustable control device body 301, an adjustable control device pull rod 302, an adjustable control device telescopic boom 303, and a steel strand bearing device 304.

[0019] As shown in Figure 2 , 3 , 4, the adjustable control device body 301 comprises a device body round rod frame 3011, a body column 3013, and a body square frame 3014. The device body round rod frame 3011 is connected to the body square frame 3014 through a plurality of body columns 3013, and the three are integrally formed by steel die casting. The body square frame 3014 is provided with a body threaded hole 3012 at each corner position, which is used to install the adjustable control device telescopic boom 303. The adjustable control device telescopic boom 303 is screwed into the body threaded hole 3012 by screwing, and the height and position of the steel strand bearing device 304 suspended below can be adjusted by adjusting the length of the adjustable control device telescopic boom 303.

[0020] As shown in Figure 2 , 3 , 4, the adjustable control device pull rod 302 is made of a steel rod with hooks at both ends. The lower end hook of the adjustable control device pull rod 302 is buckled on the device body round rod frame 3011 and can slide freely, and the upper end is buckled on the longitudinal steel bar 1, the transverse steel bar 5, or the stirrup 6, realizing the rough height and position correction of the device.

[0021] As shown in Figure 2 , 3 , 4, 5, the adjustable control device telescopic boom 303 comprises a telescopic boom threaded end 3031, a telescopic boom smooth end 3032, a telescopic boom tail end plug 3033, and a telescopic boom tail end buckle 3034. The telescopic boom threaded end 3031 is in threaded form and can be inserted into the body threaded hole 3012 and the length of the insertion can be adjusted by rotating. The lower part of the telescopic boom smooth end 3032 is provided with a ring of protrusions, and a circular telescopic boom tail end plug 3033 is sleeved on the protrusions. The telescopic boom tail end plug 3033 can rotate freely. The telescopic boom tail end plug 3033 is further welded with a telescopic boom tail end buckle 3034 below, which is buckled into the four corner holes of the steel strand bearing device 304, realizing the connection between the adjustable control device telescopic boom 303 and the steel strand bearing device 304. Among them, the telescopic boom tail end plug 3033 can limit and avoid emptying, but can rotate inside.

[0022] As shown in Figure 2 , 3As shown, the steel strand support device 304 is made of a steel roll with holes at four corners, in an arc-shaped structure, capable of stably supporting the placement of the steel strand 2, and the steel strand 2 and the steel strand support device 304 are fixed by binding with the wire 7, so that the steel strand 2 will not slide due to its own weight under the action of a larger height difference.

[0023] The construction method using the device for installation and linear control of catenary prestressed roof steel strand as described above is as shown in Figure 6 Specifically includes the following processes: S1: catenary prestressed roof formwork and support installation construction; S2: after the catenary prestressed roof formwork and support acceptance is completed, the installation of longitudinal reinforcement 1, transverse reinforcement 5 and stirrup 6 is sequentially carried out; S3: prestressed professional drawing deepening is carried out, the steel strand 2 elevation point is calculated according to the deepening content, and the lofting mark is placed at the formwork and reinforcement position; S4: the assembly of the adjustable control device 3 is carried out, the steel strand support device 304 and the main body square frame 3014 are connected using the adjustable control device telescopic boom 303, and the adjustable control device pull rod 302 bottom is buckled on the device main body round rod frame 3011; S5: combined with the lofting elevation point position, the adjustable control device pull rod 302 upper part is buckled on the corresponding reinforcement (longitudinal reinforcement 1 or transverse reinforcement 5 or stirrup 6) at the appropriate position, the overall device is coarsely adjusted, and the steel strand support device 304 initial elevation re-measurement is carried out; S6: the adjustable control device telescopic boom 303 is rotated, the length of its penetration into the main body threaded hole 3012 is adjusted to accurately position the steel strand support device 304, and the elevation and position thereof are determined through the equipment and instruments; S7: the steel strand anchoring end is made and threaded, the steel strand 2 is placed on the adjustable control device 3, and is fixed by binding with the wire 7, and the linear shape and position of the steel strand 2 are rechecked; S8: concrete 4 pouring, vibrating and curing are carried out; S9: after the concrete 4 reaches the design strength, prestressed tensioning and anchoring sealing construction are carried out; S10: the construction is completed, and the formwork and support are removed.

[0024] The embodiments are preferred embodiments of the present application, but the present application is not limited to the above embodiments, and any obvious improvements, replacements or modifications made by those skilled in the art without departing from the essential content of the present application shall fall within the protection scope of the present application.

Claims

1. A device for installation and linear control of catenary prestressed roof steel strands, characterized in that: The invention comprises a device main body round rod frame (3011), a plurality of main body columns (3013) are connected below the device main body round rod frame (3011), the main body columns (3013) are all mounted on a main body square frame (3014), and main body threaded holes (3012) are all provided at the four corners of the main body square frame (3014); the main body square frame (3014) is threadedly connected to four adjustable control device telescopic suspension rods (303), and the lower parts of the adjustable control device telescopic suspension rods (303) are connected to a steel strand support device (304); the strand (2) is mounted in the steel strand support device (304) and tied and fixed by a binding wire (7); an adjustable control device pull rod (302) is clamped and mounted on the device main body round rod frame (3011), and the other end of the adjustable control device pull rod (302) is clamped and mounted on the steel bars of the catenary prestressed roof.

2. The device for installation and linear control of catenary prestressed roof steel strands according to claim 1, characterized in that: The device main body round rod frame (3011), main body upright column (3013) and main body square frame (3014) are integrally die-casted using steel.

3. The device for installation and linear control of catenary prestressed roof steel strands according to claim 1, characterized in that: The adjustable control device pull rod (302) is a structure made of steel bars with hooks at both ends. The hook at the lower end is snapped onto the device body round rod frame (3011) and can slide freely, and the upper end is snapped onto the steel bars of the catenary prestressed roof.

4. The device for installation and linear control of catenary prestressed roof steel strands according to claim 1, characterized in that: The adjustable control device telescopic boom (303) comprises a telescopic boom threaded end (3031), a telescopic boom smooth end (3032), a telescopic boom tail end seal (3033), and a telescopic boom tail end buckle (3034); the telescopic boom threaded end (3031) is spirally inserted into the main body threaded hole (3012) and the insertion length is adjusted by rotation; a circle of protrusions is provided at the lower part of the telescopic boom smooth end (3032); a circular and freely rotatable telescopic boom tail end seal (3033) is sleeved on the protrusion; a telescopic boom tail end buckle (3034) is welded below the telescopic boom tail end seal (3033); and the telescopic boom tail end buckle (3034) is snapped into the four corner holes of the steel strand support device (304).

5. The device for installation and linear control of catenary prestressed roof steel strands according to claim 1, characterized in that: The steel strand supporting device (304) is made of a steel coil with holes at four corners and has an arc-shaped structure.

6. A method for installing and controlling the linear shape of a catenary prestressed roof steel strand using a device for installing and controlling the linear shape of a catenary prestressed roof steel strand, characterized in that: The process includes the following: S1: Installation and construction of catenary prestressed roof formwork and brackets; S2: After the catenary prestressed roof formwork and brackets are inspected and accepted, the longitudinal reinforcement (1), transverse reinforcement (5) and stirrups (6) are installed in sequence; S3: Carry out the deepening of prestressed professional drawings, calculate the steel strand (2) sagittal point according to the deepening content, and mark the position of the template and steel bars; S4: Assemble the catenary prestressed roof steel strand installation and linear control device, use the adjustable control device telescopic boom (303) to connect the steel strand support device (304) and the main body frame (3014), and buckle the bottom of the adjustable control device pull rod (302) on the device main body round rod frame (3011); S5: Based on the sagittal height point position of the lofting, the upper portion of the adjustable control device pull rod (302) is buckled onto the corresponding steel bar, and the overall device is roughly adjusted, and the initial elevation re-measurement of the steel strand support device (304) is performed; S6: rotating the telescopic boom (303) of the adjustable control device to adjust the length of the boom inserted into the threaded hole (3012) of the main body to accurately position the steel strand support device (304), and determining its elevation and position through equipment and instruments; S7: Make the anchor end of the steel strand and thread it into a bundle, place the steel strand (2) on the adjustable control device (3) and tie it with a tie wire (7), and recheck the linear shape and position of the steel strand (2); S8: pouring, vibrating and curing concrete (4); S9: After the concrete (4) reaches the design strength, prestressing and anchoring construction is carried out; S10: After the construction is completed, the formwork and support are removed.

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