A prestressed steel strand anti-slip device based on haunch beam and installation construction method

Abstract

The application discloses a kind of pre-stressed steel strand anti-slip devices of haunch beam and installation construction method, and anti-slip device includes: crossbar array, screw rod and cover plate, crossbar array is made of multiple crossbar modules, each crossbar module includes a pair of crossbars;Screw rod is laid with multiple crossbar modules along length direction, and a pair of crossbars of each crossbar module is symmetrically distributed on the opposite side of screw rod;Positioning assembly, positioning assembly is spaced apart and is arranged along the length direction of crossbar, and limiting space is formed between adjacent two positioning assemblies, and limiting space is used to install a steel strand;One end of cover plate is hingedly arranged at the end of crossbar away from screw rod, and one side of cover plate is away from or close to crossbar by hinged rotation, to be used to press the steel strand on crossbar;Wherein, screw rod and crossbar module are threadedly rotatably connected, so that the distance between adjacent two crossbar modules in vertical height is adjustable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of steel strand square slip device, more particularly, to a prestressed steel strand anti-slip device based on haunched beam and a setting construction method. BACKGROUND

[0002] With the development of economy and construction technology, prestressed large-span structure is applied more and more widely, and the tension of prestressed tendon can reduce or control the generation of post-cracks. For the slow-bonding prestressed large-span beam structure, due to the characteristics of large span, the arrangement of slow-bonding prestressed steel in the beam should avoid dense steel binding and control the height of the key position, so it is inevitable to bend.

[0003] The traditional prestressed beam uses unbonded prestressed tendon or bonded prestressed tendon, and the unbonded prestressed tendon has the disadvantage of insufficient structural performance, and the bonded prestressed tendon needs to be arranged with a hole and pressure drop in construction, which is complex in process and produces a large amount of pollutants. The slow-bonding prestress is similar to the unbonded prestress, and compared with the bonded prestress, it does not need to wear a corrugated pipe and does not need to grout, which reduces two complex processes and reduces the influence of on-site manual operation, so that the construction quality can be easily guaranteed. The slow-bonding prestress uses a single-hole anchor, and compared with the bonded prestress, the node arrangement is more flexible. In the construction process of the slow-bonding prestressed tendon, the following problems will be encountered: 1. The prestressed tendon is reserved from the beam side and is easily hindered by the beam end hoop to generate a large friction force, and the working surface of the haunched beam construction platform is limited, so the worker operates time-consuming and laborious. 2. The installation and fixing precision of the prestressed steel strand reverse bending point is not high, and the secondary parabolic shape is greatly affected by the concrete pouring and vibrating. 3. The construction quality of the prestressed beam with different section widths and heights is uneven.

[0004] Therefore, how to provide a device for accurately positioning the prestressed steel tendon in the slow-bonding prestressed beam, and find a construction method for large-span slow-bonding prestressed beam to speed up the construction efficiency and ensure the construction quality are problems that need to be solved by those skilled in the art. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, in a first aspect, the present application provides a haunched beam prestressed steel strand anti-slip device, the anti-slip device comprising a horizontal rod array, a lead screw, a positioning assembly and a cover plate.

[0006] The horizontal rod array is composed of a plurality of horizontal rod modules, and each horizontal rod module comprises a pair of horizontal rods.

[0007] The lead screw is provided with a plurality of horizontal rod modules along the length direction, and a pair of horizontal rods of each horizontal rod module is symmetrically distributed on the opposite sides of the lead screw.

[0008] The positioning assembly is arranged at intervals along the length direction of the cross bar, and a limiting space is formed between two adjacent positioning assemblies, and the limiting space is used for arranging one steel strand;

[0009] One end of the cover plate is hingedly arranged at the end of the cross bar away from the lead screw, and the cover plate is turned away from or close to the cross bar through the hinge, so as to press the steel strand arranged on the cross bar.

[0010] The lead screw and the cross bar module are threadedly connected, so that the distance between two adjacent cross bar modules in the vertical direction can be adjusted.

[0011] In the first aspect, the cross bar comprises:

[0012] The cross bar front section, the cross bar standard section and the cross bar end section each comprise a pair of connecting blocks and a connecting plate arranged between the pair of connecting blocks, and a connecting groove is formed between the pair of connecting blocks, wherein a pair of cross bar limiting holes are formed between the pair of connecting blocks of the cross bar front section.

[0013] The cross bar rotation shaft support is fixedly connected with the cover plate at one end, and the other end of the cross bar rotation shaft support extends into the pair of connecting blocks of the cross bar front section, and a pair of elastic members are arranged on the opposite side walls of the other end of the cross bar rotation shaft support, and the pair of elastic members elastically interfere with the opposite edges of the pair of connecting blocks of the cross bar front section when extending into the pair of connecting blocks.

[0014] In the first aspect, the connecting plate between any one pair of connecting blocks of the cross bar front section, the cross bar standard section and the cross bar end section is provided with a threaded hole, and the threaded holes of the connecting plates between the pair of connecting blocks of the cross bar front section and the cross bar standard section, or the cross bar standard section and the cross bar end section are at the same horizontal position and are connected by bolts.

[0015] In the first aspect, the pair of connecting blocks of the cross bar front section is also provided with a threaded hole corresponding to the threaded hole, and a reinforcing cover adjusting bolt for connecting with an external structure is arranged in the threaded hole.

[0016] In the first aspect, the positioning assembly comprises screws and nuts, the screws are arranged at intervals along the front section, the standard section and the end section of the crossbar, the limiting spaces are formed between adjacent two screws, the screw comprises a screw rod and a screw shank which is integrally formed at one end of the screw rod, the diameter of the screw shank is larger than the interval between the pair of connecting blocks, and the diameter of the nut is also larger than the interval between the pair of connecting blocks, the screw rod is arranged to pass through the limiting space from one side of the limiting space and is connected with the nut, the screw rod is limited by the nut and the screw shank, the part of the screw rod which passes through the limiting hole constitutes a limiting column, and adjacent two limiting columns constitute the positioning assembly.

[0017] In the first aspect, the anti-slip device further comprises a positioning nut, the positioning nut comprises:

[0018] A rod-shaped connecting piece, a positioning nut screw rod hole is arranged in the middle of the rod-shaped connecting piece, the positioning nut screw rod hole is used for passing through the screw rod and forming a rotating fit with the screw rod, and the two ends of the rod-shaped connecting piece are correspondingly detachably connected with a pair of crossbar of the crossbar module.

[0019] In the first aspect, a crossbar rotating shaft hole is further arranged on the opposite side walls of the pair of connecting blocks of the end section of the crossbar, the two ends of the rod-shaped connecting piece are provided with positioning nut rotating shaft holes which are matched with the crossbar rotating shaft hole, and the crossbar rotating shaft hole and the positioning nut rotating shaft hole are connected through the positioning nut.

[0020] In the first aspect, the screw rod comprises a rod body and a screw rod head.

[0021] The screw rod head is arranged at the end of the rod body, the screw rod head is in a plate structure, the middle of the plate structure is fixedly connected with the rod body, and the two sides of the plate structure are distributed on the two sides of the rod body.

[0022] In the second aspect, the application provides a construction method of the anti-slip device based on the haunched beam prestressed steel strand, the construction method is applied to the anti-slip device based on the haunched beam prestressed steel strand, and the construction method comprises the following steps:

[0023] In step S101, the anti-slip device based on the haunched beam prestressed steel strand is placed at an initial installation position, a pair of crossbars of the anti-slip device based on the haunched beam prestressed steel strand is in a closed state, the closed state comprises that the crossbar is hingedly rotated with the positioning nut which is hingedly connected through the crossbar rotating shaft hole, so that the crossbar is in a parallel and close-fitting state with the screw rod.

[0024] Step S102, open the pair of cross bars of the pre-stressed steel strand anti-slip device of the haunched beam in the initial installation position, so that the pair of cross bars on both sides of the lead screw are in a horizontal state;

[0025] Step S103, pass the steel strand, rotate the lead screw head to adjust the relative height of the lead screw and the cross bar, so that the steel strand reaches the design elevation, at this time the steel strand falls on the cross bar;

[0026] Step S104, fix the steel strand on the cross bar on the corresponding side through the positioning assembly;

[0027] Step S105, adjust the extension length of the reinforcement cover adjustment bolt in the threaded hole, so as to support the formwork on both sides and adjust the thickness of the reinforcement cover;

[0028] S106, repeat steps S101-S105 to complete the installation and construction of all pre-stressed steel strand anti-slip devices of the haunched beam.

[0029] In the second aspect, the step S104 comprises:

[0030] S1041. Screw on the screws on both sides of each steel strand, tighten the nuts, and limit the left and right movement space of the steel strand;

[0031] S1042. Cover the cover plate to limit the up and down movement space of the steel strand.

[0032] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0033] 1. By using the positioning function of the device, the problems of pre-stressed steel strand reverse bending point, angle, elevation and spacing are solved without affecting the basic requirements of concrete pouring construction, meeting the construction needs of different beam sections, saving time and effort, reducing cost and increasing efficiency. The traditional pre-stressed steel strand position adjustment method is short steel spot welding fixation. Once the positioning is deviated, the positioning steel needs to be manually moved, which is time-consuming and labor-intensive. By quickly adjusting the relative height of the lead screw head and the cross bar, it is convenient to adjust the up and down position of the slow-bonding pre-stressed steel strand, effectively solving the problem of inaccurate positioning of the up and down position of the pre-stressed steel strand. After the position of the steel strand is determined, screws are placed on both sides to solve the problem of left and right deviation of the steel strand during concrete pouring. By keeping the two cross bars vertical before installation, the device is easily inserted into the beam, and the two cross bars remain horizontal after installation to support the pre-stressed steel strand, solving the problem of deformation and displacement of the positioning device caused by concrete disturbance during concrete pouring, and ensuring the construction quality.

[0034] 2. The device crossbar modular design, crossbar reach to different beam width adaptability strong advantage. Crossbar by the front, standard section, end three parts, adjust the number of standard section to adjust the length of the crossbar, due to the beam width gap, a single length of crossbar can not better meet the requirements of the construction site.

[0035] 3. Adjust the reinforcement cover adjusting bolt in the threaded hole, make it support the beam both sides of the formwork, to adjust the thickness of the reinforcement cover. The traditional concrete cushion block due to the action of gravity, once there is external interference, concrete cushion block will slip off the beam side, adjust the beam side of the reinforcement cover thickness effect is not ideal. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the whole installation structure diagram of the prestressed steel strand anti-slip device for haunched beam in embodiment one of the application;

[0037] Figure 2 It is the structure diagram of the crossbar in embodiment one of the application;

[0038] Figure 3 It is the structure diagram of the prestressed steel strand anti-slip device for haunched beam in embodiment one of the application;

[0039] Figure 4 It is the structure diagram of the positioning nut in embodiment one of the application;

[0040] Figure 5 It is the flowchart of a kind of installation construction method based on the prestressed steel strand anti-slip device for haunched beam in embodiment two of the application.

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 1. Crossbar; 11. Crossbar shaft support; 12. Crossbar limiting hole; 13. Limiting rod; 14. Crossbar shaft hole; 15. Crossbar front section; 16. Crossbar standard section; 17. Crossbar end section; 18. Threaded hole; 19. Reinforcement cover adjusting bolt;

[0043] 2. Screw rod; 21. Screw rod head;

[0044] 3. Cover plate 31. Rotation hole; 32. Cover plate shaft hole; 33. Extension bead;

[0045] 4. Positioning nut; 41. Positioning nut screw rod hole; 42. Positioning nut shaft hole;

[0046] 5. Shaft;

[0047] 6. Screw;

[0048] 7. Nut;

[0049] 8. Steel strand. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0051] Example 1:

[0052] like Figures 1-4 As shown, the present invention provides an anti-slip device for prestressed steel strands with added haunch beams, the anti-slip device comprising a crossbar array, a screw rod 2, a positioning assembly and a cover plate 3;

[0053] The cross bar array is composed of a plurality of cross bar modules, each of which includes a pair of cross bars 1; the screw rod 2 is provided with a plurality of cross bar modules along the length direction, and a pair of cross bars 1 of each cross bar module are symmetrically distributed on opposite sides of the screw rod 2; the positioning components are arranged at intervals along the length direction of the cross bar 1, and a limiting space is formed between two adjacent positioning components, and the limiting space is used to install a steel strand 8; one end of the cover plate 3 is hingedly provided at the end of the cross bar 1 away from the screw rod 2, and one side of the cover plate 3 is moved away from or close to the cross bar 1 by hinged rotation, so as to be used to press the steel strand 8 located on the cross bar 1; wherein, the screw rod 2 and the cross bar module are matched by threaded rotation, so that the distance between two adjacent cross bar modules in vertical height can be adjusted.

[0054] In the prestressed steel strand anti-slip device for the haunch beam of the first embodiment of the present application, an innovative structural design is adopted to ensure the stability and safety of the steel strand 8 during the construction process. The specific implementation is as follows: first, the device is composed of a series of crossbar arrays, which are composed of multiple crossbar modules, each module containing a pair of crossbars 1 symmetrically distributed on both sides of the lead screw 2. The lead screw 2 is the core part of the device, and the crossbar modules are uniformly arranged along its length direction, ensuring the uniformity and stability of the structure. Second, the positioning assembly is arranged at intervals along the length direction of the crossbar 1, forming multiple limiting spaces, each of which is used to install a steel strand 8, ensuring that the steel strand 8 will not displace during the construction process. In addition, the design of the cover plate 3 is also a key part of the device. One end of the cover plate 3 is fixed to the crossbar 1 through a hinged manner, away from the lead screw 2. Through the hinged rotation, the cover plate 3 can be flexibly pressed on the steel strand 8 on the crossbar 1, further enhancing the fixing effect of the steel strand 8. Most importantly, the lead screw 2 and the crossbar module are in threaded rotation, allowing the operator to easily adjust the vertical height between adjacent crossbar modules according to the construction requirements, thereby adapting to different construction conditions and the tensioning requirements of the steel strand 8. Through this design, the device not only improves the construction efficiency, but also greatly enhances the stability and safety of the steel strand 8 during the construction process, with high practical value and promotion prospects.

[0055] For the connection between the crossbar 1 and the cover plate 3, the embodiment proposes an implementation, which sets a rotating hole 31 on the cover plate 3, then sets a vertical plate, sets a cover plate shaft hole 32 on the vertical plate, and inserts a common shaft 5 into the rotating hole 31 and the cover plate shaft hole 32, so as to form a rotatable hinged manner.

[0056] In some preferred embodiments, the crossbar 1 includes:

[0057] The crossbar front section 15, the crossbar standard section 16, and the crossbar end section 17 all include a pair of connecting blocks and a connecting plate arranged between the pair of connecting blocks, and a connecting groove is formed between the pair of connecting blocks, wherein a pair of crossbar limiting holes 12 is formed between the pair of connecting blocks of the crossbar front section 15;

[0058] The horizontal rod rotation shaft support 11 is fixedly connected to one end of the cover plate 3, and the other end of the horizontal rod rotation shaft support 11 extends into a pair of the connecting blocks of the horizontal rod front section 15. A pair of horizontal rod limiting holes 12 are arranged on the opposite side walls of the connecting blocks, and a pair of elastic members are arranged on the opposite side walls of the other end of the horizontal rod rotation shaft support 11. When the pair of elastic members extend into the pair of connecting blocks, the elastic members elastically interfere with the opposite edges of the pair of connecting blocks of the horizontal rod front section 15. Then, the elastic members are compressed and slide along the horizontal rod limiting holes 12 and are limited in the horizontal rod limiting holes 12. It should be noted that the elastic members in the embodiment are retractable beads 33.

[0059] In the above embodiment, the horizontal rod 1 is composed of three main parts: the horizontal rod front section 15, the horizontal rod standard section 16, and the horizontal rod end section 17. Each part includes a pair of connecting blocks and a connecting plate, and the connecting blocks form a connecting groove between them to ensure the stability and strength of the horizontal rod 1. The horizontal rod front section 15 is specially designed with a pair of horizontal rod limiting holes 12, which are used for fixedly connecting with one end of the horizontal rod rotation shaft support 11 to ensure the stability of the horizontal rod 1 during rotation. The other end of the horizontal rod rotation shaft support 11 extends into the connecting blocks of the horizontal rod front section 15, and a pair of elastic members on the opposite side walls of the horizontal rod rotation shaft support 11 elastically interfere with the opposite edges of the connecting blocks of the horizontal rod front section 15, thereby realizing the fixation and support of the horizontal rod 1. This design not only improves the flexibility of installation and adjustment of the horizontal rod 1, but also enhances the stability of the horizontal rod 1 during construction. The arrangement of the elastic members further ensures the elastic recovery capability of the horizontal rod 1 when subjected to external force, reducing the damage to the equipment caused by accidental collision or pressure during construction. Through this innovative structural design, the device not only ensures construction safety, but also improves construction efficiency and equipment service life.

[0060] Further, the connecting plates between any pair of connecting blocks of the horizontal rod front section 15, the horizontal rod standard section 16, and the horizontal rod end section 17 are provided with screw holes, and the screw holes of the connecting plates between a pair of connecting blocks of the horizontal rod front section 15 and the horizontal rod standard section 16, or the horizontal rod standard section 16 and the horizontal rod end section 17 are at the same horizontal position and are connected by bolts.

[0061] In some preferred embodiments, a pair of threaded holes 18 are also arranged on the connecting blocks of the horizontal rod front section 15, and a reinforcing cover adjustment bolt 19 for connecting with an external structure is arranged in the threaded hole 18. The external structure includes the formwork on both sides of the support beam.

[0062] In some preferred embodiments, the positioning assembly comprises screws 6 and nuts 7, the screws 6 are arranged at intervals along the connecting blocks between the front section 15, the standard section 16 and the end section 17 of the crossbar, the limiting space is formed between two adjacent screws 6, the screw 6 comprises a screw rod and a screw handle which is integrally formed at one end of the screw rod, the diameter of the screw handle is larger than the distance between the connecting blocks, and the diameter of the nut 7 is also larger than the distance between the connecting blocks, the screw rod is arranged to pass through the limiting space from one side and is connected with the nut 7, so as to be limited by the screw handle and the nut 7, the part of the screw rod passing through the limiting hole forms a limiting column, and two adjacent limiting columns form the positioning assembly.

[0063] In the above embodiments, the positioning assembly is composed of screws 6 and nuts 7, the screws 6 are arranged at intervals along the connecting blocks between the front section 15, the standard section 16 and the end section 17 of the crossbar. Each screw 6 comprises a screw rod and a screw handle which is integrally formed with the screw rod, and the diameter of the screw handle is designed to be larger than the depth of the connecting groove. The diameter of the nut 7 is also larger than the distance between the connecting blocks, the screw rod is arranged to pass through the limiting space from one side and is connected with the nut 7, so as to be limited by the screw handle and the nut 7. The part of the screw rod passing through the limiting hole forms a limiting column, and two adjacent limiting columns form the positioning assembly for passing through the steel strand 8. This design not only improves the installation precision and stability of the crossbar 1, but also provides additional support and fixation through the limiting column, thereby ensuring the accurate positioning and preventing the steel strand 8 from slipping during construction, significantly improving the safety and efficiency of construction.

[0064] In some preferred embodiments, the anti-slip device further comprises a positioning nut 4, the positioning nut 4 comprises:

[0065] The rod-shaped connecting piece is provided with a positioning nut screw rod hole 41 in the middle, the positioning nut screw rod hole 41 is used for passing through the screw rod 2 and forming a rotating fit with the screw rod 2, and the two ends of the rod-shaped connecting piece are detachably connected with a pair of crossbars 1 of the crossbar module.

[0066] In some preferred embodiments, the pair of connecting blocks of the crossbar end section 17 are further provided with a crossbar rotating shaft hole 14 on the opposite side walls, both ends of the rod-shaped connecting piece are provided with a positioning nut rotating shaft hole 42 matched with the crossbar rotating shaft hole 14, and the crossbar rotating shaft hole 14 and the positioning nut rotating shaft hole 42 are connected through a connecting screw. Meanwhile, a limiting rod 13 is further arranged between the pair of connecting blocks of the crossbar end section, which is used to limit the position after the crossbar rotating shaft hole 14 and the positioning nut rotating shaft hole 42 are connected through the connecting screw. Specifically, the limiting rod 13 is used to limit the crossbar 1 to rotate only in the first quadrant, and when the crossbar 1 is opened and in a horizontal state, the limiting rod 13 supports the crossbar 1 so that it cannot continue to rotate downward under the action of gravity.

[0067] In some preferred embodiments, the lead screw 2 includes a rod body and a lead screw head 21.

[0068] The lead screw head 21 is arranged at the end of the rod body, the lead screw head 21 is in a plate structure, the middle part of the plate structure is fixedly connected with the rod body, and the two sides of the plate structure are distributed on the two sides of the rod body.

[0069] Embodiment two:

[0070] As shown in Figure 5 The present application provides a setting construction method of the anti-slip device of the prestressed steel strand of the haunched beam, which is applied to the anti-slip device of the prestressed steel strand of the haunched beam in any one of the above embodiments, and the setting construction method comprises the following steps:

[0071] Step S101, placing the anti-slip device of the prestressed steel strand of the haunched beam at an initial installation position, so that the pair of crossbars of the anti-slip device of the prestressed steel strand of the haunched beam are in a closed state, and the closed state includes that after the crossbar rotating shaft hole and the hinged connecting positioning nut of the hinged connection are hingedly rotated, the crossbar rotation is kept in parallel and adhered to the lead screw;

[0072] Step S102, opening the pair of crossbars of the anti-slip device of the prestressed steel strand of the haunched beam at the initial installation position, so that the pair of crossbars arranged on the two sides of the lead screw are in a horizontal state, and the limiting rod supports the crossbar so that it cannot continue to rotate downward under the action of gravity;

[0073] Step S103, threading the steel strand and rotating the lead screw head to adjust the relative height of the lead screw and the crossbar, so that the steel strand reaches the design elevation, at this time the steel strand falls on the crossbar and the prestressed steel strand is threaded;

[0074] Step S104, fixing the steel strand on the crossbar of the corresponding side through the positioning assembly;

[0075] Step S105, adjust the length of the reinforcing cover adjusting bolt in the threaded hole, so that it supports the two side forms, thereby adjusting the thickness of the reinforcing cover;

[0076] S106, repeat the steps S101-S105 to complete the installation and construction of all the anti-slippage devices of the prestressed steel strand of the beam with haunch.

[0077] Before step S101, corresponding preparation work is also needed, for example, the design unit designs the size, number, reverse bending point, elevation, spacing and other parameters of the steel strand according to the stress condition of the prestressed beam. After the installation of the steel reinforcement in the prestressed beam is completed, the number of the horizontal rod standard sections is adjusted according to the beam width to achieve the effect of adjusting the length of the device horizontal rod.

[0078] In some preferred embodiments, the step S104 comprises: S1041. Screw the screw on both sides of each steel strand, tighten the nut, and limit the left and right movement space of the steel strand; S1042. Cover the cover plate to limit the up and down movement space of the steel strand.

[0079] Those skilled in the art will readily understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for installing a prestressed steel strand anti-slip device based on a haunched beam, characterized in that, The prestressed steel strand anti-slip device for the haunched beam comprises: An array of crossbars, which is composed of a plurality of crossbar modules, each of which comprises a pair of crossbars (1); A lead screw (2) along which a plurality of crossbar modules are arranged in length, and a pair of crossbars (1) of each crossbar module are symmetrically distributed on opposite sides of the lead screw (2); A positioning assembly arranged at intervals along the length of the crossbar (1), and a limiting space is formed between two adjacent positioning assemblies, which is used to install a steel strand (8); A cover plate (3) hingedly arranged at one end of the crossbar (1) away from the lead screw (2), and by hingedly rotating, one side of the cover plate (3) is away from or close to the crossbar (1), so as to press the steel strand (8) on the crossbar (1); Wherein, the lead screw (2) and the crossbar module are threadedly connected, so that the distance between two adjacent crossbar modules in vertical height can be adjusted; The crossbar (1) comprises a crossbar front section (15), a crossbar standard section (16), and a crossbar end section (17); each of the crossbar front section (15), the crossbar standard section (16), and the crossbar end section (17) comprises a pair of connecting blocks and a connecting plate arranged between the pair of connecting blocks, and a connecting groove is formed between the pair of connecting blocks; wherein a pair of crossbar limiting holes (12) are arranged between the pair of connecting blocks of the crossbar front section (15); A crossbar shaft support (11) is fixedly connected at one end of the cover plate (3), and the other end of the crossbar shaft support (11) extends into the pair of connecting blocks of the crossbar front section (15), and a pair of elastic members are arranged on the opposite sides of the other end of the crossbar shaft support (11), which elastically interfere with the opposite edges of the pair of connecting blocks of the crossbar front section (15) when extending into the pair of connecting blocks; A threaded hole (18) is further arranged on the pair of connecting blocks of the crossbar front section (15), and a reinforcing cover adjusting bolt (19) is arranged in the threaded hole (18) for connecting with an external structure; The anti-slip device further comprises a positioning nut (4), which comprises: A rod-shaped connecting piece, the middle part of which is provided with a positioning nut lead screw hole (41) for penetrating the lead screw (2) and forming a rotating fit with the lead screw (2); the two ends of the rod-shaped connecting piece are detachably connected to a pair of crossbars (1) of the crossbar module; A crossbar shaft hole (14) is further arranged on the opposite sides of the pair of connecting blocks of the crossbar end section (17), and the two ends of the rod-shaped connecting piece are provided with positioning nut shaft holes (42) matched with the crossbar shaft holes (14), and the crossbar shaft holes (14) and the positioning nut shaft holes (42) are connected by connecting screws; The installation construction method comprises: Step S101, the prestressed steel strand anti-slip device of the haunched beam is placed in the initial installation position, and a pair of horizontal rods of the prestressed steel strand anti-slip device of the haunched beam is in a closed state, the closed state includes that the horizontal rod is hinged to rotate after the horizontal rod passes through the horizontal rod pivot hole and the hinge connected positioning nut, so that the horizontal rod is in a parallel and close-fitting state with the screw rod; Step S102, the pair of horizontal rods of the prestressed steel strand anti-slip device of the haunched beam in the initial installation position is opened, and the pair of horizontal rods on both sides of the screw rod is in a horizontal state; Step S103, the steel strand is threaded, the screw rod head is rotated to adjust the relative height of the screw rod and the horizontal rod, so that the steel strand reaches the design elevation, and at this time the steel strand falls on the horizontal rod; Step S104, the steel strand is fixed on the horizontal rod of the corresponding side through the positioning assembly; Step S105, the extension length of the reinforcement protection layer adjusting bolt in the threaded hole is adjusted, so as to support the formwork on both sides and adjust the thickness of the reinforcement protection layer; S106, the steps of S101-S105 are repeated to complete the installation and construction of all prestressed steel strand anti-slip devices of the haunched beam.

2. The installation and construction method based on the prestressed steel strand anti-slip device of the haunched beam according to claim 1, characterized in that: screw holes are arranged on the connecting plates between any pair of connecting blocks of the horizontal rod front section (15), the horizontal rod standard section (16) and the horizontal rod tail section (17), the screw holes of the connecting plates between a pair of connecting blocks of the horizontal rod front section (15) and the horizontal rod standard section (16), or the horizontal rod standard section (16) and the horizontal rod tail section (17) are in the same horizontal position, and are connected by bolts.

3. The installation and construction method based on the prestressed steel strand anti-slip device of the haunched beam according to claim 2, characterized in that: the positioning assembly comprises a screw (6) and a nut (7), the screw (6) is arranged at intervals along a pair of connecting blocks between the horizontal rod front section (15), the horizontal rod standard section (16) and the horizontal rod tail section (17), a limiting space is formed between the adjacent two screws (6), the screw (6) comprises a screw rod and a screw handle which is integrally formed at one end of the screw rod, the diameter of the screw handle is larger than the spacing between the pair of connecting blocks, and the diameter of the nut (7) is also larger than the spacing between the pair of connecting blocks, the screw rod is threaded out of the limiting space from one side of the limiting space and is connected with the nut (7) to limit the screw handle through the nut (7), the part of the screw rod threaded out of the limiting space constitutes a limiting column, and the adjacent two limiting columns constitute the positioning assembly.

4. The installation construction method of the prestressed steel strand anti-slip device based on the haunched beam according to claim 3, characterized in that, The screw rod (2) comprises a rod body and a screw rod head (21); The screw rod head (21) is arranged at the end of the rod body, the screw rod head (21) is in a plate structure, the middle part of the plate structure is fixedly connected with the rod body, and the two sides of the plate structure are distributed on both sides of the rod body.

5. The installation construction method of the prestressed steel strand anti-slippage device based on the haunched beam according to claim 1, characterized in that, The step S104 comprises: S1041. Screw on both sides of each steel strand, tighten the nut, and limit the left and right movement space of the steel strand; S1042. Cover the cover plate, and limit the up and down movement space of the steel strand.

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