A self-lifting arch rib vertical rotation lifting frame installation system and method

Abstract

The present invention provides a self-lifting arch rib vertical rotation lifting frame installation system and method. Two top segments of the arch rib vertical rotation lifting frame are pre-connected with the truss on the ground, and a lifting sleeve and a lifting cylinder are installed at the bottom of each top segment to form a self-lifting arch rib vertical rotation lifting frame installation system. When installing the arch rib vertical rotation lifting frame, the lifting sleeve is sleeved on two standard segments that have been installed at the lower part of the tower, and the top segment is lifted by the lifting cylinder to a height greater than a standard segment each time, and then a standard segment is lifted by a crane installed on the truss for installation. No large crane is used during the construction process, and it is not limited by the height and construction environment, and the construction safety is high.

Description

Technical Field

[0001] The invention belongs to the technical field of steel arch bridge construction, and relates to an installation system and an installation method for an arch bridge arch rib vertical rotation lifting frame. Background Art

[0002] After the arch ribs of the steel arch bridge are assembled using the low-level horizontal assembly method, they need to be rotated vertically to the designed installation angle and position. The vertical rotation of the arch ribs needs to be carried out using a vertical lifting frame. Figure 1 As shown, the arch rib vertical lifting frame includes towers 1 located on both sides of the arch rib. The main body of each tower 1 is composed of multiple standard segments connected up and down. The top of the tower 1 is provided with a top segment 2. A truss 3 is built between the two tower top segments. An operating platform 4 and a hydraulic lifting system 5 are installed on the truss 3.

[0003] When installing the arch rib vertical rotation lifting frame, a large crane is usually used to hoist each standard segment one by one, and finally hoist the top segment and truss. Due to the high height of the tower, the high-altitude hoisting construction is very dangerous, and the arch bridge construction location is generally in mountainous areas or narrow river valleys. Large hoisting equipment is often unable to be deployed, which causes certain difficulties in the installation of the arch rib vertical rotation lifting frame. Summary of the invention

[0004] The purpose of the present invention is to provide a self-lifting arch rib vertical rotation lifting frame installation system and method to solve the problems encountered in the installation process of the existing arch rib vertical rotation lifting frame using a large crane, so as to adapt to the construction conditions in narrow river valley areas and improve the safety of installation and construction.

[0005] To achieve the above-mentioned purpose, the present invention first provides a self-lifting arch rib vertical rotation lifting frame installation system, which is characterized in that: it includes two lifting frames, each of which includes four vertical rods, and the length of the vertical rods is greater than the length of a standard segment of the arch rib vertical rotation lifting frame; the upper ends of the four vertical rods of each lifting frame are respectively welded to the four corners at the bottom of the top segment of an arch rib vertical rotation lifting frame, and a truss is fixed on the top of the two top segments, and a crane that can move longitudinally along the truss is installed on the truss; along both sides of the truss, two vertical lifting cylinders are arranged between the two vertical rods of each lifting frame, and the upper end of each lifting cylinder The ends are connected to the cross bar of the top segment through a pin shaft, and the lower ends of the two lifting cylinders are respectively connected to the top edge of a support beam through a pin shaft; a foldable triangular bracket is arranged on each vertical rod on the opposite sides of the two lifting frames, and the triangular bracket includes a bracket cross bar and an oblique support rod, one end of the bracket cross bar is connected to the vertical rod of the lifting frame through a pin shaft, the other end of the bracket cross bar is connected to the upper end of the oblique support rod through a pin shaft, and the lower end of the oblique support rod is connected to the vertical rod through a pin shaft; a vertical slide groove is arranged on the vertical rod below the connection between the bracket cross bar and the vertical rod, and the pin shaft connecting the oblique support rod and the vertical rod is inserted in the slide groove and can slide up and down along the slide groove.

[0006] The present invention also provides a method for installing an arch rib vertical rotation lifting frame using the above-mentioned self-lifting arch rib vertical rotation lifting frame installation system, which is characterized by comprising the following steps:

[0007] (1) According to the designed installation position of the arch rib vertical lifting frame, the first standard segments of the two towers of the vertical lifting frame are fixed on the concrete foundation respectively, and then the second standard segments of the two towers are hoisted onto the first standard segments by a crane and connected and fixed; a support plate is pre-welded on the outer wall of each column of each standard segment on both sides of the cross bridge near the lower end, and the top of the support plate is provided with a bayonet for clamping with the two ends of the support beam;

[0008] (2) Use a crane to hoist the self-lifting arch rib vertical rotation lifting frame installation system onto the installed standard segment. Each lifting frame is placed on the outer periphery of the installed standard segment. The top segment is supported on the top of the second standard segment. Both ends of the support beam are supported on the support plate at the bottom of the second standard segment respectively.

[0009] (3) Synchronously start all the lifting cylinders to lift the top segment upward to a height greater than that of a standard segment;

[0010] (4) Lift the third standard segment of a tower frame by means of a crane on the truss and lift it to a height above the triangular bracket on the lifting frame; unfold the triangular bracket on the lifting frame on one side of the tower frame;

[0011] (5) The overhead crane lifts the third standard segment and moves it to the top of the unfolded triangular bracket, and lowers it onto the triangular bracket; then a hand chain hoist is set on the top segment and in the lifting frame, and the fall chain of the hand chain hoist is connected to the third standard segment on the triangular bracket;

[0012] (6) Move the third standard segment into the lifting frame by means of a hand chain hoist and connect and fix it to the second standard segment below; fold the triangular bracket on this side, and then use the same method to install the third standard segment of the tower on the other side;

[0013] (7) Contract the lifting cylinder to lower the top segment and support it on the top of the installed third standard segment, and temporarily connect and fix the top segment to the third standard segment;

[0014] (8) Continue to retract the lifting cylinder so that the support beam connected to the lower end of the lifting cylinder leaves the support plate on the second standard segment, and then release the pin connection between one lifting cylinder and the support beam so that the support beam is vertically suspended at the lower end of the other lifting cylinder;

[0015] (9) Continue to retract the lifting cylinder to make the lower end of the lifting cylinder rise above the support plate at the bottom of the third standard segment, and then reconnect the support beam and the lifting cylinder through the pin shaft; adjust the extension and contraction of the lifting cylinder to support the two ends of the support beam on the support plate at the bottom of the third standard segment;

[0016] (10) Release the connection between the top segment and the third standard segment, and use the method of steps (3) to (9) above to sequentially hoist the subsequent standard segments;

[0017] (11) After all standard segments are installed, the top segment is connected and fixed to the uppermost standard segment. Then, a ladder is installed on one side of the tower, an operating platform is installed on the truss, and an arch rib hydraulic lifting system is installed on the operating platform to complete the installation of the arch rib vertical lifting frame.

[0018] The present invention pre-connects the top segment of the arch rib vertical lifting frame with the truss on the ground, installs a lifting sleeve at the bottom of the top segment, and sleeves the lifting sleeve on the installed standard segment. The top segment is lifted by a cylinder to a height greater than that of a standard segment each time, and then the standard segment is lifted and installed one by one by a crane installed on the truss. There is no need to use a large crane, the construction is not limited by the height and the construction environment, the applicability is strong, and the construction safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the arch rib vertical rotation lifting frame;

[0020] Figure 2It is a front view structural diagram of the self-lifting arch rib vertical rotation lifting frame installation system, in which the triangular bracket on one side is in an unfolded state, and the triangular bracket on the other side is in a folded state;

[0021] Figure 3 It is a side view structural diagram of the self-lifting arch rib vertical rotation lifting frame installation system;

[0022] Figure 4 This is a schematic diagram of the state after the two standard segments at the bottom of the two towers of the arch rib vertical lifting frame are installed;

[0023] Figure 5 It is a schematic diagram of the installation state of the self-lifting arch rib vertical rotation lifting frame installation system when it is in use;

[0024] Figure 6 It is a schematic diagram of the state of the self-lifting arch rib vertical rotation lifting frame installation system when the cylinder is lifted;

[0025] Figure 7 It is a schematic diagram of the state when the overhead crane lifts a standard segment;

[0026] Figure 8 This is a schematic diagram of the state where the overhead crane places the standard segment on the triangular bracket;

[0027] Fig. 9 It is a schematic diagram of the state of connecting and fixing the hoisted standard segment with the standard segment installed below;

[0028] Fig.10 This is a schematic diagram of the state after the installation of two standard segments of the same height on two towers;

[0029] Fig.11 It is a schematic diagram of the state in which the connection between the support beam and a cylinder pin is released after the jacking cylinder is retracted;

[0030] Fig.12 It is a schematic diagram of the status of the self-lifting arch rib vertical rotation lifting frame installation system before the next cycle standard segment installation. DETAILED DESCRIPTION

[0031] like Figure 2 , Figure 3As shown, a self-lifting arch rib vertical rotation lifting frame installation system provided by the present invention includes two lifting frames, each of which includes four vertical rods 6, the length of which should be greater than the length of a standard segment of the arch rib vertical rotation lifting frame. In specific implementation, the length of the vertical rods is preferably close to but not greater than the height of two standard segments; the upper ends of the four vertical rods 6 of each lifting frame are respectively welded to the four corners at the bottom of the top segment 2 of an arch rib vertical rotation lifting frame, and a truss 3 is fixedly erected on the top of the two top segments 2, and a crane 7 that can move longitudinally along the truss is installed on the truss 3; along both sides of the truss, two vertical lifting cylinders 8 are arranged between the two vertical rods 6 of each lifting frame, and each lifting cylinder 8 The upper end is connected to the cross bar of the top segment 2 by a pin, and the lower ends of the two lifting cylinders 8 are respectively connected to the top edge of a support beam 9 by a pin; a foldable triangular bracket is arranged on each vertical rod 6 on the opposite sides of the two lifting sleeves, and the triangular bracket includes a bracket cross bar 10 and an oblique support rod 11, one end of the bracket cross bar 10 is connected to the vertical rod 6 of the lifting sleeve by a pin, and the other end of the bracket cross bar 10 is connected to the upper end of the oblique support rod 11 by a pin, and the lower end of the oblique support rod 11 is connected to the vertical rod by a pin; a vertical slide groove 12 is arranged on the vertical rod 6 below the connection between the bracket cross bar and the vertical rod, and the pin connecting the oblique support rod 11 and the vertical rod 6 is inserted in the slide groove 12 and can slide up and down along the slide groove.

[0032] Figure 2 In the figure, the triangular bracket on the right lifting frame is in the unfolded state; the triangular bracket on the left lifting frame is in the folded state. The bracket cross bar 10 of the unfolded folding frame is rotated upward, and the pin at the lower end of the diagonal support rod 11 can slide upward along the slide groove. When the bracket cross bar 10 is rotated to be parallel to the vertical rod 6, the triangular bracket is converted into the folded state, and the pin connecting the bracket cross bar and the diagonal support rod is inserted into the pin hole on the vertical rod to keep the triangular bracket in the folded state.

[0033] When the self-lifting arch rib vertical rotation lifting frame installation system is used to install the arch rib vertical rotation lifting frame, the specific construction method is as follows:

[0034] (1) Figure 4 As shown, according to the designed installation position of the arch rib vertical lifting frame, the first standard segments 13 at the bottom of the two towers of the vertical lifting frame are respectively fixed on the concrete foundation, and then the second standard segments 14 of the two towers are respectively lifted and placed on the two first standard segments 13 by a crane and connected and fixed.

[0035] A support plate 15 is welded in advance on the outer walls on both sides of each column cross bridge of each standard segment near the lower end as a supporting structure when the jacking cylinder is lifting; a slot can be opened on the top of the support plate to facilitate the two ends of the support beam to be clamped on the support plate to maintain stability in the subsequent process.

[0036] (2) Figure 5 As shown, a self-lifting arch rib vertical lifting frame installation system is hoisted onto the installed standard segment by a crane, and each lifting frame is sleeved on the periphery of the installed standard segment. The four vertical rods 6 of the lifting frame correspond to the four columns of the standard segment respectively, and the top segment 2 is supported on the top of the second standard segment; the two ends of the support beam 9 connected to the lower end of the lifting cylinder 8 are respectively supported on the two support plates 15 at the lower part of the second standard segment.

[0037] (3) Figure 6 As shown, all the lifting cylinders 8 are started synchronously to lift the two top segments 2 upward to a height greater than that of a standard segment.

[0038] (4) Figure 7 As shown, the third standard segment 16 of a tower is hoisted by the overhead crane 7 on the truss 3 and hoisted to a height above the top of the triangular bracket on the jacking sleeve; the triangular bracket on the jacking sleeve on one side of the tower is unfolded;

[0039] (5) Figure 8 As shown, the overhead crane lifts the third standard segment 16 and moves it to the top of the unfolded triangular bracket, and lowers the third standard segment onto the triangular bracket; then a hand chain hoist 17 is arranged on the top segment and in the lifting sleeve, and the fall chain 18 of the hand chain hoist is connected to the standard segment on the triangular bracket;

[0040] (6) Fig. 9 As shown, the third standard segment 16 is moved into the lifting frame by a hand winch 17 and is connected and fixed to the second standard segment 14 below.

[0041] Fold the triangular bracket on one side of the installed third standard segment; then use the same method to install the third standard segment of the tower on the other side;

[0042] (7) Fig.10 As shown, all the lifting cylinders 8 are contracted synchronously, so that the top segment 2 is lowered and supported on the top of the installed third standard segment 16, and the top segment 2 is temporarily connected and fixed with the third standard segment 16;

[0043] (8) Fig.11 As shown, the jacking cylinder 8 is further retracted to make the support beam 9 connected to the lower end of the jacking cylinder rise and leave the support plate on the second standard segment, and then the pin connection between one jacking cylinder and the support beam 9 is released, so that the support beam 9 is vertically suspended at the lower end of another jacking cylinder to avoid being blocked by the support plate on the third standard segment when lifting upward;

[0044] (9) Fig.12As shown, continue to retract the lifting cylinder 8 to make the lower end of the lifting cylinder rise above the support plate 15 at the bottom of the third standard segment 16, and then connect the support beam 9 to the two lifting cylinders 8 with pins; adjust the extension and contraction of the lifting cylinder to support the two ends of the support beam 9 on the support plate 15 at the bottom of the third standard segment.

[0045] (10) The connection between the top segment 2 and the third standard segment 16 is released, and the above steps (3) to (9) are cyclically adopted to sequentially hoist subsequent standard segments.

[0046] (11) After all standard segments of tower 1 are installed, top segment 2 is connected and fixed to the top standard segment of the tower, and then Figure 1 As shown, a ladder 19 is installed on one side of the tower, and construction workers climb the ladder to install an operating platform 4 on the truss, and install an arch rib hydraulic lifting system 5 on the operating platform to complete the installation of the arch rib vertical lifting frame.

Claims

1. A self-lifting arch rib vertical rotation lifting frame installation system, characterized in that: The utility model comprises two jacking sleeves, each of which comprises four vertical rods, the length of which is greater than the length of a standard segment of the arch rib vertical rotation lifting frame; the upper ends of the four vertical rods of each jacking sleeve are respectively welded to the four corners at the bottom of the top segment of an arch rib vertical rotation lifting frame, and a truss is fixedly set on the top of the two top segments, and a crane which can move longitudinally along the truss is installed on the truss; along both sides of the truss, two vertical jacking cylinders are arranged between the two vertical rods of each jacking sleeve, and the upper end of each jacking cylinder is connected to the cross bar of the top segment by a pin shaft, and the two jacking cylinders are connected to the cross bar of the top segment by a pin shaft. The lower end of the cylinder is connected to the top edge of a support beam through a pin shaft; a foldable triangular bracket is arranged on each vertical rod on the opposite sides of the two lifting sleeves, and the triangular bracket includes a bracket cross rod and an oblique support rod, one end of the bracket cross rod is connected to the vertical rod of the lifting sleeve through a pin shaft, the other end of the bracket cross rod is connected to the upper end of the oblique support rod through a pin shaft, and the lower end of the oblique support rod is connected to the vertical rod through a pin shaft; a vertical slide groove is arranged on the vertical rod below the connection between the bracket cross rod and the vertical rod, and the pin shaft connecting the oblique support rod and the vertical rod is inserted in the slide groove and can slide up and down along the slide groove.

2. A method for installing an arch rib vertical rotation lifting frame using the self-lifting arch rib vertical rotation lifting frame installation system according to claim 1, characterized in that: The following steps are involved: (1) According to the designed installation position of the arch rib vertical lifting frame, the first standard segments of the two towers of the vertical lifting frame are fixed on the concrete foundation respectively, and then the second standard segments of the two towers are hoisted onto the first standard segments by a crane and connected and fixed; a support plate is pre-welded on the outer wall of each column of each standard segment on both sides of the cross bridge near the lower end, and the top of the support plate is provided with a bayonet for clamping with the two ends of the support beam; (2) Use a crane to hoist the self-lifting arch rib vertical rotation lifting frame installation system onto the installed standard segment. Each lifting frame is placed on the outer periphery of the installed standard segment. The top segment is supported on the top of the second standard segment. Both ends of the support beam are supported on the support plate at the bottom of the second standard segment respectively. (3) Synchronously start all the lifting cylinders to lift the top segment upward to a height greater than that of a standard segment; (4) Lift the third standard segment of a tower frame by means of the overhead crane on the truss and lift it to a height above the triangular bracket on the lifting frame; unfold the triangular bracket on the lifting frame on one side of the tower frame; (5) The overhead crane lifts the third standard segment and moves it to the top of the unfolded triangular bracket, and lowers it onto the triangular bracket; then a hand chain hoist is set on the top segment and in the lifting frame, and the fall chain of the hand chain hoist is connected to the third standard segment on the triangular bracket; (6) Move the third standard segment into the lifting frame by means of a hand chain hoist and connect and fix it to the second standard segment below; fold the triangular bracket on this side, and then use the same method to install the third standard segment of the tower on the other side; (7) Contract the lifting cylinder to lower the top segment and support it on the top of the installed third standard segment, and temporarily connect and fix the top segment to the third standard segment; (8) Continue to retract the lifting cylinder so that the support beam connected to the lower end of the lifting cylinder leaves the support plate on the second standard segment, and then release the pin connection between one lifting cylinder and the support beam so that the support beam is vertically suspended at the lower end of the other lifting cylinder; (9) Continue to retract the lifting cylinder to make the lower end of the lifting cylinder rise above the support plate at the bottom of the third standard segment, and then reconnect the support beam and the lifting cylinder through the pin shaft; adjust the extension and contraction of the lifting cylinder to support the two ends of the support beam on the support plate at the bottom of the third standard segment; (10) Release the connection between the top segment and the third standard segment, and use the method of steps (3) to (9) above to sequentially hoist the subsequent standard segments; (11) After all standard segments are installed, the top segment is connected and fixed to the uppermost standard segment. Then, a ladder is installed on one side of the tower, an operating platform is installed on the truss, and an arch rib hydraulic lifting system is installed on the operating platform to complete the installation of the arch rib vertical lifting frame.

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