Bridge pier creeping formwork descending protection device and downward climbing protection method thereof

Abstract

The invention belongs to the technical field of bridge pier construction, and particularly relates to a bridge pier climbing formwork descending protection device and a climbing protection method.The bridge pier climbing formwork descending protection device comprises a climbing frame, a hydraulic climbing formwork assembly and an anti-falling mechanism, the climbing frame is movably connected with a bridge pier through the hydraulic climbing formwork assembly, and the hydraulic climbing formwork assembly comprises a climbing oil cylinder, a reversing box and a guide rail with a notch; the guide rail is longitudinally fixed to a shear wall of a pier, the reversing boxes are installed at the two ends of the downward-climbing oil cylinder respectively, the downward-climbing oil cylinder is movably connected with the guide rail through the reversing boxes, and the anti-falling mechanism is detachably connected with the guide rail through a notch and connected with the reversing boxes in a clamped mode. The hydraulic climbing formwork has the beneficial effects that the whole climbing frame climbs down to the ground through the hydraulic climbing formwork assembly, and the safety of formwork removal construction is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge pier construction, and in particular to a bridge pier climbing formwork descent protection device and a descent protection method thereof. Background Art

[0002] At present, the hydraulic climbing formwork is usually used for the construction of high concrete piers of bridges. The climbing formwork is installed on the ground and the piers are constructed by climbing up section by section. After the pier construction is completed, since the climbing formwork does not have the function of climbing down, it is necessary to use a tower crane to dismantle it piece by piece at high altitude, which poses a high construction risk. During the climbing process of the traditional hydraulic climbing formwork, the moving reversing box has an anti-falling function. If you want to climb down, the moving reversing box does not have the anti-falling function, which greatly reduces the safety.

[0003] The specific reasons are as follows: the climbing formwork is equipped with several load-bearing blocks on the guide rails. During the upward climbing process, one of the upper and lower reversing boxes presses on the load-bearing block, and the other moves upward with the extension and contraction of the hydraulic cylinder. At this time, the reversing tongues are in a fixed state and can move upward to pass through the load-bearing block. When falling, they will be stuck on the load-bearing block and have an anti-falling function. When climbing downward, the reversing tongue needs to turn its direction to pass through the load-bearing block, and the anti-falling function will be lost. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problems and specifically designs a pier climbing formwork descent protection device and a climbing protection method thereof, so that the entire climbing frame can climb down to the ground through a hydraulic climbing formwork assembly, thereby greatly improving the safety of formwork removal construction.

[0005] To achieve the above-mentioned purpose, the present invention provides a pier climbing formwork descent protection device, comprising a climbing frame, a hydraulic climbing formwork assembly and an anti-falling mechanism, the climbing frame is movably connected to the pier through the hydraulic climbing formwork assembly, the hydraulic climbing formwork assembly comprises a lower climbing cylinder, a reversing box and a guide rail with a slot, the guide rail is longitudinally fixed on the shear wall of the pier, there are multiple groups of reversing boxes, which are respectively installed at both ends of the lower climbing cylinder, the lower climbing cylinder is movably connected to the guide rail through the reversing box, the anti-falling mechanism is detachably connected to the guide rail through the slot, and the anti-falling mechanism is clamped with the reversing box.

[0006] Furthermore, the hydraulic climbing formwork assembly also includes a plurality of load-bearing blocks, the load-bearing blocks are fixedly connected to the guide rails, and the reversing tongues in the reversing box are clamped with the load-bearing blocks.

[0007] Furthermore, the anti-fall mechanism includes a limit card and a plug plate with bolt holes, the limit card is fixedly connected to the plug plate, the plug plate is connected to the guide rail through a fastener, and the limit card is plugged into the guide rail through the slot.

[0008] Furthermore, the anti-fall mechanism also includes a handle, and the handle is fixedly connected to the plug plate.

[0009] Furthermore, it also includes a limiting mechanism, which is connected to the bridge pier through a positioning embedded part, and the climbing cylinder is inserted into the limiting mechanism.

[0010] Furthermore, the limiting mechanism includes a supporting base and a limiting member, the supporting base is connected to the positioning embedded member via a threaded connection, the limiting member is fixedly connected to the supporting base, and the supporting base, the limiting member and the guide rail are connected to form a limiting groove, and the climbing cylinder is inserted into the limiting groove.

[0011] Furthermore, the limiting member includes two groups of F-shaped limiting blocks that are arranged in a mirror image, and the guide rail is clamped in the grooves of the limiting blocks.

[0012] The present invention also includes a climbing protection method for a pier climbing formwork descending protection device, comprising the following steps: 1) The reversing tongue in the first reversing box connected to the piston of the climbing cylinder turns to the active state, and the reversing tongue connected to the second reversing box at the cylinder end remains in a fixed state. The climbing cylinder is started, the piston moves downward, and the first reversing box moves downward with the piston. At this time, the climbing frame is supported by the second reversing box; 2) During the extension of the piston of the climbing cylinder, install the upper and lower limit mechanisms every time it moves 0.4m~1m, remove the limit mechanism for this stroke, and turn the reversing tongue of the first reversing box to a fixed state after the piston has been lowered; 3) The reversing tongue in the second reversing box turns to the active state, and the climbing frame is supported on the first reversing box through the lower climbing cylinder; 4) The cylinder end of the climbing cylinder retracts, and the climbing frame follows the cylinder end in the process of descending. Every time it moves 0.4m~1m, the upper and lower limit mechanisms are installed, and the limit mechanisms for this stroke are removed. After the cylinder end is completely lowered, the reversing tongue of the second reversing box is turned to a fixed state, and the current descending stroke is ended; 5) Enter the next descent journey.

[0013] In summary, the present invention has the following advantages and beneficial technical effects: 1. Compared with the existing hydraulic climbing formwork assembly, the present invention adds an anti-fall protection mechanism, so that the climbing frame can climb down to the ground as a whole and dismantle the climbing formwork on the ground, which greatly improves the construction safety; when the hydraulic climbing formwork assembly accidentally falls out of control, the anti-fall mechanism arranged along the guide rail can clamp the falling reversing box to prevent the climbing frame from falling further, thereby improving the safety of the descent; after the anti-fall mechanism is inserted, the limit card and bolts are used to limit the horizontal position to prevent itself from falling off.

[0014] 2. The present invention adopts a long-stroke hydraulic cylinder to reduce the insertion and removal of the limit mechanism and increase the descending speed. At the same time, in order to solve the lateral slip problem of the long-stroke climbing cylinder, a new type of cylinder lateral limit mechanism is designed as a limit protection for the climbing cylinder. The limit block is used for plugging and limiting the guide rail, and the limit groove formed is used to limit the lateral displacement of the climbing cylinder, ensuring that the cylinder maintains the correct feeding direction and enhancing the accuracy and safety of the demolding construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is along Figure 1 The local enlarged view of the A in the middle; Figure 3 It is a schematic diagram of the front view of the anti-falling mechanism in the present invention; Figure 4 is a schematic top view of the anti-fall mechanism in the present invention; Figure 5 It is a schematic diagram of the installation of the limiting mechanism in the present invention; Figure 6 It is a front view schematic diagram of the limiting mechanism in the present invention; Figure 7 is a side view schematic diagram of the limiting mechanism in the present invention; Figure 8 It is a schematic diagram of the initial state of the present invention; Fig. 9 This is a schematic diagram of the present invention's downward climbing state. Figure 1 ; Fig.10 This is a schematic diagram of the present invention's downward climbing state. Figure 2 ; Fig.11 It is a schematic diagram of the state when the downward climbing of the present invention is completed.

[0016] The reference numerals in the accompanying drawings are: 1. Climbing frame; 2. Hydraulic climbing formwork assembly; 21. Lower climbing cylinder; 22. First reversing box; 23. Second reversing box; 24. Reversing tongue; 25. Guide rail; 26. Notch; 27. Load-bearing block; 3. Anti-fall mechanism; 31. Limiting card; 32. Insert plate; 33. Bolt hole; 34. Handle; 4. Limiting mechanism; 41. Support base; 42. Limiting block; 43. Limiting groove; 5. Bridge pier; 6. Positioning embedded parts; 7. Thread. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the implementation of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the embodiments and directional terms described below with reference to the drawings are exemplary and intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings: The following is combined with Figure 1-Figure 11 The present invention is described in further detail: Embodiment 1 like Figure 1-Figure 2 As shown, this embodiment discloses a pier climbing formwork descending protection device, including a climbing frame 1, a hydraulic climbing formwork assembly 2 and an anti-falling mechanism 3. The climbing frame 1 is movably connected to the pier 5 through the hydraulic climbing formwork assembly 2. The hydraulic climbing formwork assembly 2 includes a lower climbing cylinder 21, a reversing box and an I-shaped guide rail 25 with a notch 26. The guide rail 25 is longitudinally fixed on the shear wall of the pier 5. There are two groups of reversing boxes, including a first reversing box 22 and a second reversing box 23, which are respectively installed in the lower climbing cylinder 21 and the lower climbing cylinder 22. 1, the lower climbing cylinder 21 is movably connected to the guide rail 25 through the reversing box, the anti-falling mechanism 3 is detachably connected to the guide rail 25 through the notch 26, and when the hydraulic climbing formwork assembly 2 is accidentally out of control, the anti-falling mechanism 3 clamps the reversing box that freely falls along the guide rail 25; the hydraulic climbing formwork assembly 2 also includes a plurality of bearing blocks 27, which are in a linear array and are welded on the end surface of the guide rail 25 away from the pier 5, and the reversing tongue 24 in the reversing box clamps the bearing blocks 27.

[0018] like Figure 3-Figure 4 As shown, the anti-fall mechanism 3 includes a limit card 31 and a plug plate 32 with a bolt hole 33, the limit card 31 is welded to the plug plate 32, the plug plate 32 is connected to the guide rail 25 by fastening bolts, and the limit card 31 is plugged into the guide rail 25 through the slot 26; the anti-fall mechanism 3 also includes a handle 34, and the handle 34 is welded to the plug plate 32.

[0019] like Figure 5-Figure 7As shown, the protection device also includes a cylinder lateral limiting mechanism 4, the limiting mechanism 4 is connected to the bridge pier 5 through a positioning embedded part 6, the positioning embedded part 6 is a wall-mounted bolt, and the climbing cylinder 21 is inserted into the limiting mechanism 4; the limiting mechanism 4 includes a support base 41 and a limiting part, the support base 41 is connected to the positioning embedded part 6 through a thread 7, the limiting part is welded to the support base 41, and the support base 41, the limiting part and the guide rail 25 are connected to form a limiting groove 43, and the climbing cylinder 21 is inserted into the limiting groove 43; the limiting part includes two groups of F-type limiting blocks 42 arranged in a mirror image, and the guide rail 25 is clamped in the grooves of the two groups of limiting blocks 42.

[0020] Embodiment 2 A climbing protection method of a pier climbing formwork descending protection device of the present invention is as follows: Step 1: If Figure 8 As shown, the reversing tongue 24 in the first reversing box 22 connected to the piston part of the lower climbing oil cylinder 21 turns to an active state, and the reversing tongue 24 connected to the second reversing box 23 at the cylinder end remains in a fixed state. The lower climbing oil cylinder 21 is started, the piston part extends, and the first reversing box 22 descends with the piston part. At this time, the climbing frame 1 is supported by the second reversing box 23; Step 2: If Fig. 9 As shown, the climbing cylinder 21 adopts a 1.5m long stroke hydraulic cylinder to reduce the insertion and removal of the limit mechanism 4. During the extension process of the piston part, the limit mechanism 4 of the next 0.5m stroke is installed every time the piston part moves 0.5m, and the limit mechanism 4 of this stroke is removed. After the piston part descends 1.5m, the reversing tongue 24 of the first reversing box 22 is turned to a fixed state; Step 3: If Fig.10 As shown, the reversing tongue 24 in the second reversing box 23 turns to an active state, and at this time the climbing frame 1 is supported on the first reversing box 22 through the lower climbing cylinder 21; Step 4: If Fig.11 As shown, the cylinder end of the lower climbing cylinder 21 retracts, and the climbing frame 1 follows the cylinder end in the process of descending together. Every time it moves 0.5m, the limit mechanism 4 of the next 0.5m stroke is installed, and the limit mechanism 4 of this stroke is removed. After the cylinder end is lowered, the reversing tongue 24 of the second reversing box 23 is turned to a fixed state, and the current 1.5m descending stroke is ended; Step 5: Enter the next descent stroke.

[0021] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pier climbing formwork descending protection device, characterized in that: It includes a climbing frame, a hydraulic climbing formwork assembly and an anti-falling mechanism. The climbing frame is movably connected to the bridge pier through the hydraulic climbing formwork assembly. The hydraulic climbing formwork assembly includes a lower climbing cylinder, a reversing box and a guide rail with a slot. The guide rail is longitudinally fixed on the shear wall of the bridge pier. There are multiple groups of reversing boxes, which are respectively installed at both ends of the lower climbing cylinder. The lower climbing cylinder is movably connected to the guide rail through the reversing box. The anti-falling mechanism is detachably connected to the guide rail through the slot, and the anti-falling mechanism is clamped with the reversing box.

2. A pier climbing formwork descent protection device according to claim 1, characterized in that: The hydraulic climbing formwork assembly also includes a plurality of load-bearing blocks, the load-bearing blocks are fixedly connected to the guide rails, and the reversing tongues in the reversing box are clamped with the load-bearing blocks.

3. A pier climbing formwork descent protection device according to claim 1, characterized in that: The anti-fall mechanism comprises a limit card and a plug plate with bolt holes, the limit card is fixedly connected to the plug plate, the plug plate is connected to the guide rail through a fastener, and the limit card is plugged into the guide rail through the slot.

4. A pier climbing formwork descent protection device according to claim 3, characterized in that: The anti-falling mechanism also includes a handle, and the handle is fixedly connected to the plug plate.

5. The pier climbing formwork descent protection device according to claim 1 is characterized by: It also includes a limiting mechanism, which is connected to the bridge pier through a positioning embedded part, and the climbing cylinder is inserted into the limiting mechanism.

6. A pier climbing formwork descent protection device according to claim 5, characterized in that: The limiting mechanism includes a supporting base and a limiting member, the supporting base is connected to the positioning embedded member through a threaded buckle, the limiting member is fixedly connected to the supporting base, and the supporting base, the limiting member and the guide rail are connected to form a limiting groove, and the climbing cylinder is inserted into the limiting groove.

7. A pier climbing formwork descent protection device according to claim 6, characterized in that: The limiting member comprises two groups of F-shaped limiting blocks which are arranged in a mirror image, and the guide rail is clamped in the grooves of the limiting blocks.

8. A climbing protection method for a pier climbing formwork descending protection device, characterized in that: The steps of installing the pier climbing formwork drop protection device according to claim 7 are: Step 1: The reversing tongue in the first reversing box connected to the piston part of the climbing oil cylinder is turned to an active state, and the reversing tongue connected to the second reversing box at the cylinder end remains in a fixed state. The climbing oil cylinder is started, the piston part moves downward, and the first reversing box moves downward with the piston part. At this time, the climbing frame is supported by the second reversing box; Step 2: During the extension of the piston of the climbing cylinder, install the upper and lower limit mechanisms every 0.4m to 1m, remove the limit mechanism for this stroke, and turn the reversing tongue of the first reversing box to a fixed state after the piston is completely lowered; Step 3: The reversing tongue in the second reversing box turns to an active state, and the climbing frame is supported on the first reversing box through the lower climbing cylinder; Step 4: The cylinder end of the climbing cylinder retracts, and the climbing frame follows the cylinder end in the process of descending. Every time it moves 0.4m~1m, the upper and lower limit mechanisms are installed, and the limit mechanisms for this stroke are removed. After the cylinder end is lowered, the reversing tongue of the second reversing box is turned to a fixed state, and the current descending stroke is ended; Step 5: Enter the next descent stroke.

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