Bridge wet joint construction method and construction device

Abstract

The application relates to the field of bridge construction, in particular to a bridge wet joint construction method and a construction device, the construction device comprising a hoisting rod oppositely arranged in a reserved hoisting hole on a precast beam body on two sides of a wet joint to be constructed, a roller hanger being arranged at the bottom end of the hoisting rod, and a roller being arranged at the bottom of the roller hanger; a walking frame body is arranged between the two rollers; a winch is arranged at the tail position of the wet joint to be constructed; and a traction rope of the winch is fixedly bound with the walking frame body. The scheme provided by the application avoids frequent hoisting of a formwork by workers, reduces the installation difficulty of the formwork, and improves the installation speed of the formwork.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a method and apparatus for constructing wet joints in bridges. Background Technology

[0002] Precast bridges are a common type of bridge in the field. Precast beams are produced in a prefabrication yard and then transported to the bridge site for installation. The gaps between adjacent precast beams are joined together with cast-in-place concrete to form a whole that can jointly bear vehicle loads. The construction process of wet joints generally involves assembling formwork on the ground below the corresponding wet joint after the reinforcement of the wet joint is installed. After assembly, the formwork is manually lifted to the bottom of the beam using ropes, and the beam is firmly connected to the formwork. Finally, concrete is poured. When removing the formwork, workers use ropes again to lower the formwork to the ground. After cleaning, the formwork is transported to the bottom of the next wet joint to be constructed. Existing construction methods are inefficient, especially when the bridge is high above the ground or crosses a river. They are not only inefficient and difficult to construct, but also carry high risks. Summary of the Invention

[0003] To address the aforementioned problems, embodiments of the present invention provide a method and apparatus for constructing wet joints in bridges.

[0004] This invention provides a method for constructing wet joints in bridges, comprising:

[0005] S1. When producing precast beams, a hoisting hole is reserved on the precast beam at a first distance from the edge of the beam flange plate, and a second distance is spaced between adjacent hoisting holes in the longitudinal direction.

[0006] S2. After the precast beams are installed at the bridge site and before the reinforcement of the wet joints is installed, a suspension device is installed in each hoisting hole. The suspension device includes a hanger rod passing through the hoisting hole, a roller hanger is installed at the bottom of the hanger rod, and a roller is installed at the bottom of the roller hanger.

[0007] S3. Make a walking frame according to the width between the roller hangers set on both sides of the wet joint to be constructed. Set a winch at the end of the wet joint to be constructed. Tie the traction rope of the winch to the walking frame and move the walking frame to the beginning of the wet joint to be constructed and place it on the rollers on both sides from the wet joint to be constructed.

[0008] S4. Adhere sealing strips to the edges of the wooden formwork surface and set wooden ribs at horizontal intervals on the bottom surface. Drill holes and install tie bolts at the intersection of the longitudinal center line of the wooden formwork and the wooden ribs. Then, place the wooden formwork on the traveling frame from the wet joint to be constructed.

[0009] S5. Install the reinforcing steel bars for the wet joint to be constructed according to the standard procedures. After installation, wash the dirt off the surface of the wooden formwork and hoist the wooden formwork into place using tie bolts.

[0010] S6. Pour concrete onto the wooden formwork. After the concrete has cured, unscrew the nuts on the tie bolts located above the bridge deck and place the wooden formwork on the traveling frame.

[0011] S7. Use a winch to pull the traveling frame and move it to the next section of the wet joint to be constructed. Then, carry out the construction of this section of the wet joint according to S5 and S6.

[0012] S8. Complete the construction of this wet joint according to S5-S7. After the construction is completed, the suspension device supporting the walking frame is dismantled at the same time, and the walking frame is lowered to the ground below using ropes. The remaining suspension devices are dismantled in sequence and lowered to the ground below using ropes.

[0013] Compared with the prior art, the advantages of the present invention are: it avoids workers from frequently hoisting the formwork, reduces the difficulty of formwork installation, and increases the speed of formwork installation.

[0014] Optionally, the first distance is 150mm, the second distance is 6m, and the diameter of the hoisting hole is 3cm.

[0015] Optionally, the spacing between adjacent logs is 500mm.

[0016] Optionally, the step of hoisting the wooden formwork into place using tie bolts includes setting up wooden blocks at positions opposite to the tie bolts on the wet joint to be constructed, making holes at the intersection of the wooden blocks and the tie bolts, and locking the tie bolts after they pass through the wooden blocks to hoist the wooden formwork into place.

[0017] Optionally, during the process of pouring concrete onto the wooden formwork in S6, a 10cm diameter pre-reserved hole is reserved every 3m along the longitudinal centerline of the wet joint to be constructed; correspondingly, during the process of placing the wooden formwork on the traveling frame in S7, the wooden formwork is knocked off the concrete and falls onto the traveling frame by tapping through the pre-reserved hole.

[0018] In another aspect of the present invention, a bridge wet joint construction device is provided for the above-mentioned bridge wet joint construction method. The device includes a lifting rod that is installed in a pre-reserved hoisting hole on the precast beam on both sides of the wet joint to be constructed. A roller hanger is installed at the bottom of the lifting rod, and a roller is installed at the bottom of the roller hanger. A traveling frame is erected between the two rollers. A winch is set at the tail position of the wet joint to be constructed, and the traction rope of the winch is tied and fixed to the traveling frame. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. In the drawings:

[0020] Figure 1This is a schematic diagram of the reserved hole setting in the bridge wet joint construction method provided in the embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the suspension device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the assembly of the suspension device and the traveling frame provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a wooden template placed on a mobile frame, as provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of a wooden formwork hoisting structure provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the connection between a winch and a traveling frame, provided as an embodiment of the present invention.

[0026] Among them, the precast beam body 1, hoisting hole 2, steel reinforcement for wet joint to be constructed 3, hoisting rod 4, roller hanger 5, roller 6, hoisting rod nut 7, spreader beam 8, wet joint to be constructed 9, traveling frame body 10, winch 11, traction rope 12, wooden formwork 13, sealing strip 14, wooden joists 15, tie bolts 16, and timber 17. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0028] This invention provides a method for constructing wet joints in bridges, comprising:

[0029] S1. During the production of precast beam 1, if Figure 1 As shown, a hoisting hole 2 is reserved on the precast beam 1 at a first distance from the edge of the beam flange plate, and a second distance is spaced between adjacent hoisting holes 2 in the longitudinal direction.

[0030] During implementation, the first distance is 150mm, the second distance is 6m, the diameter of the hoisting hole 2 is 3cm, and the longitudinal direction is the length direction of the beam.

[0031] S2. After the precast beam 1 is installed at the bridge site and before the installation of the wet joint reinforcement 3, a suspension device is installed in each hoisting hole 2, such as... Figure 2 The suspension device shown includes a rod 4 passing through the hoisting hole 2, a roller bracket 5 installed at the bottom of the rod 4, and rollers 6 installed at the bottom of the roller bracket 5.

[0032] During implementation, the hanger 4 is locked and fixed by the hanger nuts 7 located on the upper and lower sides of the beam. To improve the firmness, a spreader beam 8 can be set between the upper hanger nut 7 and the beam. The roller hanger 5 is C-shaped and has a flat bottom groove, and the roller 6 is set in the flat bottom groove.

[0033] S3. Construct a traveling frame 10 according to the width between the roller hangers 5 installed on both sides of the wet joint 9 to be constructed. Install a winch 11 at the tail end of the wet joint 9, and secure the winch 11's traction rope 12 to the traveling frame 10. Figure 3 As shown, the walking frame 10 is moved to the first end of the wet joint 9 to be constructed and placed downwards across the two side rollers 6 from the wet joint 9.

[0034] In practice, the walking frame 10 includes a bearing plate, and support plates are vertically installed on the lower part of both sides of the bearing plate. When installed, the support plates are placed on rollers for easy movement.

[0035] When the winch 11 is installed, a guide rod can be installed downward on one side of the winch 11, and a guide wheel can be installed on the guide rod. The guide wheel is at the same height as the traveling frame 10, and the traction rope 12 is connected to the traveling frame 10 after passing around the guide wheel.

[0036] S4. A sealing strip 14 is pasted onto the edge of the wooden formwork 13. Wooden joists 15 are set horizontally at intervals on the bottom surface. Holes are drilled and tie bolts 16 are installed at the intersection of the longitudinal centerline of the wooden formwork 13 and the wooden joists 15. Then, the wooden formwork 13 is placed on the traveling frame 10 from the wet joint 9 to be constructed. Figure 4 As shown.

[0037] During implementation, the interval between adjacent wooden beams 15 is 500mm.

[0038] S5. Install the reinforcing steel bars 3 for the wet joint to be constructed according to the standard procedure. After installation, wash away any dirt from the surface of the wooden formwork 13. Hoist the wooden formwork 13 into place using tie bolts 16. Figure 5 As shown.

[0039] During implementation, a wooden beam 17 can be erected on the wet joint 9 to be constructed, opposite to the tie bolt 16. Holes are made at the intersection of the wooden beam 17 and the tie bolt 16. The tie bolt 16 passes through the wooden beam 17 and is locked in place, thereby hoisting the wooden formwork 13 into position.

[0040] S6. Pour concrete onto the wooden formwork 13. After the concrete has cured, unscrew the nuts on the tie bolts 16 located above the bridge deck and place the wooden formwork 13 onto the traveling frame 10.

[0041] During the implementation, when pouring concrete onto the wooden formwork 13, a 10cm diameter pre-reserved hole is reserved every 3m along the longitudinal centerline of the wet joint 9 to be constructed, to facilitate the removal of the wooden formwork 13.

[0042] S7. Use the winch 11 to pull the traveling frame 10 and move the traveling frame 10 to the next section of the wet joint 9 to be constructed. Then, carry out the construction of this section of the wet joint according to S5 and S6.

[0043] In practice, when pre-drilled holes are provided, the wooden formwork 13 can be knocked off the concrete and fall onto the walking frame 10 during the process of placing the wooden formwork 13 on the walking frame 10.

[0044] S8. Complete the construction of the wet joint 9 to be constructed according to S5-S7. After the construction is completed, the suspension device supporting the walking frame 10 is dismantled at the same time, and the walking frame 10 is lowered to the ground below using ropes. The remaining suspension devices are dismantled in sequence and lowered to the ground below using ropes.

[0045] This invention also provides a bridge wet joint construction device for the above-mentioned bridge wet joint construction method, such as... Figure 6 The diagram shows a lifting rod 4 that is installed in the pre-reserved hoisting holes 2 on both sides of the precast beam 1 of the wet joint 9 to be constructed. A roller hanger 5 is installed at the bottom of the lifting rod 4, and a roller 6 is installed at the bottom of the roller hanger 5. A traveling frame 10 is erected between the rollers 6 on both sides. A winch 11 is installed at the tail of the wet joint 9 to be constructed, and the traction rope 12 of the winch 11 is tied and fixed to the traveling frame 10.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for constructing wet joints in bridges, characterized in that, include: S1. When producing precast beams, a hoisting hole is reserved on the precast beam at a first distance from the edge of the beam flange plate, and a second distance is spaced between adjacent hoisting holes in the longitudinal direction. S2. After the precast beams are installed at the bridge site and before the reinforcement of the wet joints is installed, a suspension device is installed in each hoisting hole. The suspension device includes a hanger rod passing through the hoisting hole, a roller hanger is installed at the bottom of the hanger rod, and a roller is installed at the bottom of the roller hanger. S3. Make a walking frame according to the width between the roller hangers set on both sides of the wet joint to be constructed. Set a winch at the end of the wet joint to be constructed. Tie the traction rope of the winch to the walking frame and move the walking frame to the beginning of the wet joint to be constructed and place it on the rollers on both sides from the wet joint to be constructed. S4. Adhere sealing strips to the edges of the wooden formwork surface and set wooden ribs at horizontal intervals on the bottom surface. Drill holes and install tie bolts at the intersection of the longitudinal center line of the wooden formwork and the wooden ribs. Then, place the wooden formwork on the traveling frame from the wet joint to be constructed. S5. Install the reinforcing steel bars for the wet joint to be constructed according to the standard procedures. After installation, wash the dirt off the surface of the wooden formwork and hoist the wooden formwork into place using tie bolts. S6. Pour concrete onto the wooden formwork. After the concrete has cured, unscrew the nuts on the tie bolts located above the bridge deck and place the wooden formwork on the traveling frame. S7. Use a winch to pull the traveling frame and move it to the next section of the wet joint to be constructed. Then, carry out the construction of this section of the wet joint according to S5 and S6. S8. Complete the construction of this wet joint according to S5-S7. After the construction is completed, the suspension device supporting the walking frame is dismantled at the same time, and the walking frame is lowered to the ground below using ropes. The remaining suspension devices are dismantled in sequence and lowered to the ground below using ropes.

2. The bridge wet joint construction method as described in claim 1, characterized in that, The first distance is 150mm, the second distance is 6m, and the diameter of the hoisting hole is 3cm.

3. The bridge wet joint construction method as described in claim 1, characterized in that, The spacing between adjacent logs is 500mm.

4. The bridge wet joint construction method as described in claim 1, characterized in that, The steps for hoisting the wooden formwork into place using tie bolts include: placing wooden blocks on the wet joint to be constructed at positions opposite to the tie bolts, making holes at the intersection of the wooden blocks and the tie bolts, and then locking the tie bolts through the wooden blocks to hoist the wooden formwork into place.

5. The bridge wet joint construction method as described in claim 1, characterized in that, During the process of pouring concrete onto the wooden formwork in S6, a 10cm diameter pre-drilled hole is reserved every 3m along the longitudinal centerline of the wet joint to be constructed; correspondingly, during the process of placing the wooden formwork on the traveling frame in S7, the wooden formwork is knocked off the concrete and falls onto the traveling frame by tapping through the pre-drilled hole.

6. A bridge wet joint construction device, used in the bridge wet joint construction method according to any one of claims 1-5, characterized in that, This includes a lifting rod that is installed in the pre-reserved hoisting holes on both sides of the precast beams to be constructed wet joint. A roller hanger is installed at the bottom of the lifting rod, and rollers are installed at the bottom of the roller hanger. A traveling frame is erected between the rollers on both sides. A winch is set at the end of the wet joint to be constructed, and the traction rope of the winch is tied and fixed to the traveling frame.

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