A sinking shear hinge installation template tool

Abstract

The utility model discloses a sinking type shear hinge installation template frock, including first half mould box, second half mould box and connecting plate, first half mould box and second half mould box structure are same, including bottom plate, side plate, end plate and enclosure baffle, bottom plate two sides respectively vertical fixed connection two side plates, and end plate fixed connection is in bottom plate left side, and the enclosure baffle is U type structure, and fixed connection is in two side plates upper end and end plate back and forms a upper end and one side opening's mould box structure, is provided with the installation through -hole no.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary tooling for shear hinge construction, and relates to a recessed shear hinge installation template tooling. Background Technology

[0002] The shear hinge of the floating steel track bed in subway is an important structural component that transmits shear force between adjacent floating slabs. It can share the shear force borne by the rails at the joints between slabs, and coordinate the deformation between the slabs. It is an indispensable and important safety component for the connection between floating slabs.

[0003] Existing shear hinges are mainly divided into two types according to their working position: top-mounted and mid-mounted. Among them, the mid-mounted shear hinge is located in the middle of the adjacent floating slab, which has reasonable force distribution, but is not easy to maintain or replace. The top-mounted shear hinge is located above the floating slab, which can accommodate the relative displacement between adjacent floating slabs along the longitudinal direction of the rail, and is very convenient to maintain or replace. However, the top-mounted shear hinge protrudes from the floating slab, which affects the overall aesthetics of the floating slab track bed and affects the passage of staff during the early construction and later operation and maintenance.

[0004] Shear hinges consist of embedded sleeves, rubber pads, shear plates, and bolts. Traditional shear hinge construction lacks specific tooling, making them prone to displacement during concrete pouring, which affects construction quality, is troublesome to handle manually, and impacts construction progress. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a recessed shear hinge installation template tooling to ensure that the shear hinge does not shift during the pouring of track bed concrete and that the shear hinge is installed in a precise position.

[0006] The technical solution adopted by this utility model is as follows: A recessed shear hinge installation template tooling includes a first half-mold box, a second half-mold box, and a connecting plate. The first half-mold box and the second half-mold box have the same structure, including a base plate, side plates, end plates, and a baffle plate. Two side plates are vertically fixedly connected to the front and rear sides of the base plate, respectively. The end plate is fixedly connected to the left side of the base plate. The baffle plate has a U-shaped structure and is fixedly connected to the upper part of the two side plates and the back of the end plates to form a mold box structure with an opening at the top and one side. The base plate is provided with a first installation through hole for shear hinge anchor bolts to pass through. The connecting plate is provided with a second installation through hole for shear hinge anchor bolts to pass through. The two mold box structures are connected by the connecting plate and a set gap is maintained between the two mold boxes. The connecting plate is fixedly connected to the first half-mold box and the second half-mold box structure by shear hinge anchor bolts.

[0007] Furthermore, the aforementioned side plates and end plates are arranged at an angle, causing the sunken shear hinge installation template tooling to form an installation groove that is smaller inside and larger outside.

[0008] Furthermore, the aforementioned recessed shear hinge installation template fixture also includes a hanging plate. Two hanging plates are used, which are symmetrically fixedly connected to the opposite sides of the first half-mold and the second half-mold and fixedly connected to the side plates. The hanging plates are provided with hanging holes, and the hooks provided at the lower end of the adjusting screw are hung in the hanging holes. The upper end of the adjusting screw is inserted into a limit strip, and a nut is screwed onto the adjusting screw above the limit strip. The limit strip abuts against two channel steels, and the two channel steels overlap on the track. Each hanging plate is provided with at least two hanging holes with symmetrical relative gaps.

[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model uses shear hinge template tooling to assist in the construction of sunken shear hinges. The shear hinges do not shift during the pouring of track bed concrete, the installation position of the shear hinges is accurate, and the shear hinges sink into the track bed. After completion, the shear hinges are flush with the track bed surface, which is aesthetically pleasing and does not affect the passage of construction and later operation and maintenance personnel. It is also convenient for later maintenance. Attached Figure Description

[0010] Figure 1 A schematic diagram of the construction method for a sunken shear hinge of a cast-in-place steel spring floating slab;

[0011] Figure 2 A three-dimensional schematic diagram of the template tooling for installing a sunken shear hinge;

[0012] Figure 3 A front view diagram of the template tooling for installing a sunken shear hinge;

[0013] Figure 4 Left view schematic diagram of the template installation fixture for the sunken shear hinge;

[0014] Figure 5 A top view of the formwork fixture for installing a sunken shear hinge;

[0015] Figure 6 This is a schematic diagram of the three-dimensional structure of a semi-molded box;

[0016] Figure 7 Installation diagram of the template tooling for the sunken shear hinge;

[0017] Figure 8 A side view diagram of the installation of the template tooling for the sunken shear hinge. Detailed Implementation

[0018] The utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1: As Figures 1-8As shown, a recessed shear hinge installation template fixture includes a first half-mold box, a second half-mold box, and a connecting plate 5. The first half-mold box and the second half-mold box have the same structure, including a base plate 1, side plates 2, end plates 3, and a retaining plate 4. Two side plates 2 are vertically fixed to the front and rear sides of the base plate 1, respectively. The end plate 3 is fixedly connected to the left side of the base plate 1. The retaining plate 4 has a U-shaped structure and is fixedly connected to the upper ends of the two side plates 2 and the back of the end plate 3 to form a mold box structure with an opening at the top and one side. A handle hole 301 is provided after the upper end of the end plate 3 extends out a certain distance. A through hole 401 is provided on a section of the retaining plate 4 located on the back of the end plate 3 for inserting a round rod into the prefabricated cover plate installation hole. The base plate 1 is provided with an installation through hole 101 for the shear hinge anchor bolt 6 to pass through. The connecting plate 5 is provided with an installation through hole 101 for the shear hinge anchor bolt 6 to pass through. The shear hinge anchor bolt 6 has a second mounting hole 501. The two mold box structures are connected by a connecting plate 5, and a set gap 6 is maintained between the two mold boxes. The connecting plate 5 is fixedly connected to the first half mold box and the second half mold box structure by the shear hinge anchor bolt 6. The shear hinge anchor bolt 6 passes through the first mounting hole 101 and the second mounting hole 501 and is fixedly connected to the embedded part 14. The embedded part 14 includes a sleeve 1401 with an open upper end, a threaded steel bar 1402, and a welding plate 1403. The blind hole inside the sleeve 1401 is provided with a threaded part for connecting the shear hinge anchor bolt 6. The upper end of the threaded steel bar 1402 is fixedly connected to the lower end of the sleeve 1401. The welding plate 1403 is fixedly connected to the lower end of the threaded steel bar 1402 by welding. The welding plate 1403 is welded to the steel bar.

[0020] The side plate 2 and end plate 3 are arranged at an angle, which makes the recessed shear hinge installation template tooling form an installation groove that is smaller inside and larger outside, making demolding convenient.

[0021] A recessed shear hinge installation template fixture also includes two hanging plates 8, which are symmetrically fixedly connected to the opposite sides of the first half-mold and the second half-mold and fixedly connected to the side plate 2. The hanging plates 8 are provided with hanging holes 801, and hooks 901 are attached to the lower end of adjusting screws 9. Limiting strips 10 are inserted into the upper end of the adjusting screws 9, and nuts 11 are screwed onto the adjusting screws 9 above the limiting strips 10. The limiting strips 10 abut against two channel steels 12, which overlap on the track 13. Each hanging plate... 8. At least two symmetrically spaced hook holes 801 are provided, and an inverted U-shaped notch 802 is provided directly opposite the gap. Through the suspended adjusting screw, connecting plate and channel steel, the horizontal (verifying the movement limit strip of the two channel steels), longitudinal (moving the two channel steels along the guide rail direction) and vertical (adjusting the suspension length of the adjusting screw) positions of the sunken shear hinge installation template tooling can be adjusted. The adjustment is convenient and quick, and the positioning is accurate, stable and reliable. After positioning, it is also convenient to weld the embedded parts and steel bars, thereby realizing the accurate positioning of the sunken shear hinge installation template tooling.

[0022] A construction method for a cast-in-place steel spring floating slab with a sunken shear hinge includes the following steps:

[0023] Step 1) Fabricate the installation template for the sunken shear hinge;

[0024] Step 1) The fabrication method for the cast-in-place steel spring floating slab sunken shear hinge installation formwork is as follows: 10mm thick Q355D steel plates are used for fabrication. The specific dimensions are based on the shear hinge dimensions on the construction blueprints. The formwork includes 2 base plates, 4 side plates, 2 end plates, 2 enclosure plates, and 1 connecting plate. The formwork is connected by welding to form a channel shape. The welded channel shape is wider at the top and narrower at the bottom for easy demolding. Figure 2-8 As shown, the specific structure of the sunken shear hinge installation template tooling includes a first half-mold box, a second half-mold box, and a connecting plate 5. The first half-mold box and the second half-mold box have the same structure, including a base plate 1, side plates 2, end plates 3, and a retaining plate 4. The base plate 1 is vertically fixed to the front and rear sides of the two side plates 2 respectively. The end plate 3 is fixedly connected to the left side of the base plate 1. The retaining plate 4 has a U-shaped structure and is fixedly connected to the upper end of the two side plates 2 and the back of the end plate 3 to form a mold box structure with an opening at the top and one side. The upper end of the end plate 3 extends out to a certain extent and is then set with... There is a handle hole 301. A through hole 401 is provided on a section of the baffle plate 4 on the back of the end plate 3 for inserting a round rod into the prefabricated cover plate mounting hole. The bottom plate 1 is provided with a first mounting through hole 101 through which the shear hinge anchor bolt 6 passes. The connecting plate 5 is provided with a second mounting through hole 501 through which the shear hinge anchor bolt 6 passes. The two mold box structures are connected by the connecting plate 5 and a set gap 7 is maintained between the two mold boxes. The connecting plate 5 is fixedly connected to the first half mold box and the second half mold box structure by the shear hinge anchor bolt 6.

[0025] Step 2) Construction of cast-in-place steel spring floating slab foundation

[0026] Fabricate and tie the foundation reinforcement according to the design drawings of the cast-in-place steel spring floating slab, install the central drainage ditch formwork or side formwork of the cast-in-place steel spring floating slab, use the steel wire method to control the foundation elevation, and pour concrete after acceptance. The foundation elevation is controlled within ±5mm.

[0027] Step 3) Construction of cast-in-place steel spring floating slab track bed

[0028] 3.1) Assemble the track panels according to the design drawings. After the track panels are assembled, position and install the outer sleeve and observation sleeve. The observation sleeve is installed in the center of the track panel and the outer sleeve is installed between the sleepers. Then, tie the reinforcing cage according to the design drawings. After the reinforcing cage is tied, install galvanized flat steel at both ends of the track panel perpendicular to the track panel direction and weld it firmly to all longitudinal reinforcing bars.

[0029] 3.2) Trial assembly of shear hinge anchor bolts, shear hinge plates and shear hinge templates to ensure that the position of the pre-embedded shear hinge anchor bolts avoids the galvanized flat steel. If the position of the shear hinge anchor bolts conflicts with the flat steel or reinforcing bars, make appropriate minor adjustments to the position of the reinforcing bars to completely avoid the shear hinge anchor bolts.

[0030] 3.3) After the steel cage construction is completed, it is hoisted by gantry crane onto the railcar splicing plate and transported to the work surface. Then, it is hoisted by rail-laying vehicle for steel cage laying (Note: When splicing steel cages, pay attention to controlling the width of the plate joint (generally 3cm). When there is superelevation in the curved section, the outer strand needs to ensure that the flat steel does not conflict with the anchor bolts. The plate joint should be controlled within the allowable error range). Before laying, the center drainage ditch cover plate needs to be laid and L-shaped reinforcement welded. Then, the isolation membrane is laid.

[0031] 4) Assembly of the sunken shear hinge installation template tooling

[0032] Trial assembly of the shear hinge plate and the recessed shear hinge installation template tooling, check whether they fit together. After the fit meets the requirements, fix the recessed shear hinge installation template tooling, the connecting plate, and the M8 embedded parts (8 pieces are needed for one set of tooling) with anchor bolts (18cm long, 8 pieces are needed for one set of tooling) to form a whole. When installing the shear hinge plate, the size of the plate joint should be controlled to ensure drainage from the drainage holes at both ends.

[0033] 5) Installation and fixing of the sunken shear hinge template tooling

[0034] 5.1) Place the installed sunken shear hinge installation template into the corresponding installation gap within the reinforcing cage. Adjust the position of the sunken shear hinge installation template. After adjustment, use a level to check for tilt. Then, weld the anchor bolts to the reinforcing bars on the reinforcing cage. After fixing, place two PVC drainage pipes inside the sunken shear hinge installation template. The upper end of each pipe extends into the template and is installed at the pre-reserved ends. The lower end is vertically inserted to the base surface (one set of templates requires two φ20×300mm PVC drainage pipes). Before pouring concrete, fill the sunken shear hinge installation template with foam adhesive to prevent concrete from entering the template and contaminating the shear hinge anchor bolts, connecting plates, and drainage pipes during pouring. Note that the number of reinforcing bars around the shear hinge must match the drawings to avoid cracks appearing in the concrete around the shear hinge later.

[0035] 5.2) Installation and positioning of the sunken shear hinge installation template tooling: Horizontal positioning: the edge of the tooling close to the sleeper should be 1mm-5mm away from the sleeper edge; Vertical positioning: the upper plane of the sunken shear hinge installation template tooling should be 3.5cm below the sleeper surface. The height of the mold can also be referenced to the height of the drainage terminal (5mm lower than the concrete surface) and the height of the outer cylinder, and should be kept flush with them.

[0036] 5.3) Since the shear hinge fixture is heavy, four simple channel steels can be made and laid across the rails during its positioning and installation. The fixture can be lifted and positioned by connecting adjustable upper and lower bolts. After positioning, the pre-embedded anchor bolts are welded to the reinforcing cage for fixation, and the channel steels are removed.

[0037] 6) Concrete pouring

[0038] The concrete pouring surface should be flush with the top surface of the sunken shear hinge installation formwork. When finishing the surface, ensure that there is concrete below the edge of the sunken shear hinge installation formwork and the edge of the sleeper to avoid gaps below after demolding. The concrete around the shear hinge should be vibrated more thoroughly, but it should not collide with the sunken shear hinge installation formwork to avoid displacement.

[0039] 7) Removing the formwork after concrete pouring

[0040] When the concrete strength reaches 5MPa or 12 hours after concrete pouring, pull out the recessed shear hinge installation template. When pulling it out, remove the shear hinge plate and gently tap the recessed shear hinge installation template. Then remove it to form the installation groove of the recessed shear hinge. After the concrete reaches the set strength, fix the shear hinge to the pre-embedded anchor bolts and cover the top of the installation groove with a cover plate.

[0041] Installation and positioning of the sunken shear hinge installation template: Four channel steels are made and laid across the rails. The sunken shear hinge installation template is lifted and positioned by connecting the adjustable bolts. After positioning, the pre-embedded anchor bolts are welded to the reinforcing cage for fixation, and the channel steels are removed to complete the installation and positioning.

[0042] The construction principle of the sunken shear hinge for cast-in-place steel spring floating slabs is as follows: A sunken shear hinge installation template is used, which is installed and fixed during the track bed reinforcement binding construction to accurately position the shear hinge. Specifically: First, the shear hinge anchor bolts and connecting plates are connected and fixed to the sunken shear hinge installation template to form a shear hinge installation assembly (including two half-formwork boxes). The shear hinge installation assembly is placed into the track bed reinforcement cage, and the slab joint size is adjusted and controlled. Then, the shear hinge anchor bolts are welded and fixed to the reinforcement cage, ensuring the assembly is accurately positioned. Next, PVC drainage pipes are installed and track bed concrete is poured. After the concrete strength reaches 5MPa, the shear hinge installation template is removed. Finally, the shear hinge and shear hinge cover plate are installed.

[0043] The method of this utility model has the following advantages:

[0044] (1) The shear hinge installation formwork is installed by using a sunken shear hinge. The shear hinge does not shift during the concrete pouring of the track bed. The shear hinge is installed in a precise position, and the construction quality of the shear hinge is guaranteed.

[0045] (2) The sunken shear hinge is flush with the track bed surface, which is aesthetically pleasing and does not affect the construction and later operation and maintenance personnel. It is easy to replace later and facilitates operation and maintenance.

[0046] (3) Polyethylene boards are not used or replaced during installation, saving manpower and materials.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A recessed shear hinge installation template fixture, characterized in that, The system includes a first half-mold, a second half-mold, and a connecting plate. The first half-mold and the second half-mold have the same structure, including a base plate, side plates, end plates, and a baffle plate. Two side plates are vertically fixed to the front and rear sides of the base plate, respectively. The end plate is fixedly connected to the left side of the base plate. The baffle plate has a U-shaped structure and is fixedly connected to the upper part of the two side plates and the back of the end plate to form a mold structure with an opening at the top and one side. A through hole is provided on a section of the baffle plate on the back of the end plate. The base plate has a first installation through hole for shear hinge anchor bolts to pass through. The connecting plate has a second installation through hole for shear hinge anchor bolts to pass through. The two mold structure are connected by the connecting plate and a set gap is maintained between the two molds. The connecting plate is fixedly connected to the first half-mold and the second half-mold structure by shear hinge anchor bolts.

2. The recessed shear hinge installation template tooling according to claim 1, characterized in that, The inclined arrangement of the side plates and end plates creates an installation groove that is smaller on the inside and larger on the outside for the recessed shear hinge installation template.

3. A recessed shear hinge installation template fixture according to claim 1 or 2, characterized in that, It also includes a mounting plate. Two mounting plates are used, which are symmetrically fixed to the two sides of the first half mold box and the second half mold box and fixedly connected to the side plate. The mounting plate is provided with mounting holes. The mounting holes are used to attach hooks provided at the lower end of the adjusting screw. The upper end of the adjusting screw is inserted into a limit strip. A nut is screwed onto the adjusting screw above the limit strip. The limit strip abuts against two channel steels. The two channel steels overlap on the track. Each mounting plate is provided with at least two mounting holes with symmetrical relative gaps.

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