An assembly-integrated bridge erecting machine suitable for small and medium spans and a construction method thereof

Abstract

The present invention discloses an assembly-integrated bridge erecting machine suitable for small and medium spans and a construction method thereof, comprising: a main beam; a walking mechanism, which comprises two tire assemblies, the walking mechanism is used to drive the main beam to move in a straight line direction, and any tire assembly comprises a steering mechanism, which is arranged at the bottom of the main beam through a support beam; a roller, which is arranged below the steering mechanism; a driving mechanism, which is used to drive the roller to rotate; a supporting oil cylinder, which is vertically arranged at the bottom of the supporting beam; a leg, which is arranged at the front end of the main beam and hinged therewith; and a crane, which is arranged on the main beam and slidably connected therewith. The present invention realizes the in-situ rapid steering of the walking mechanism through the coordination of the steering mechanism and the supporting oil cylinder, thereby realizing the continuous construction of a multi-pier bridge. At the same time, when the beam block is erected, the leg is used to rotate and support on the prefabricated pier, forming a stable three-point support structure at the bottom of the bridge erecting machine, while ensuring the construction stability, improving the construction efficiency of the whole process of bridge erection construction.

Description

Technical Field

[0001] The present invention relates to the field of bridge erection equipment, and more specifically, to an assembly-integrated bridge erection machine suitable for small and medium spans and a construction method thereof. Background Art

[0002] With the popularization and development of infrastructure projects, the application of integrated assembly bridge-building machines in actual projects has gradually increased. The traditional prefabricated integrated assembly bridge-building machine has a very long leg in the front, supported on the ground or on the abutment. The leg extension and retraction takes a long time and is easily stuck during the extension and retraction process, resulting in a high construction failure rate. In addition, since the leg is too long, the vertical displacement is sensitive to changes in slope, resulting in the inability to accurately position the leg during the extension and retraction process. In addition, the traditional prefabricated integrated assembly bridge-building machine adopts a straddling inverted leg for the through-hole, which has the problems of long hoisting time and high hoisting risk.

[0003] In order to solve the above problems, it is necessary to provide an assembly-integrated bridge-erecting machine that can quickly carry out bridge-erecting construction while ensuring construction quality and construction stability. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated assembly bridge-building machine suitable for small and medium spans and a construction method thereof. The steering mechanism cooperates with the supporting oil cylinder to realize the in-situ rapid steering of the walking mechanism, thereby realizing the continuous construction of a multi-pier bridge. At the same time, when the beam blocks are erected, the outriggers are used to rotate and support them on the prefabricated piers, forming a stable three-point support structure at the bottom of the bridge-building machine, which improves the construction efficiency of the entire bridge construction process while ensuring the construction stability.

[0005] In order to achieve these purposes and other advantages according to the present invention, an assembly-integrated bridge erecting machine suitable for small and medium spans is provided, comprising:

[0006] The main beam is set horizontally;

[0007] A walking mechanism, which includes two tire assemblies, which are respectively arranged at the middle and rear of the main beam, and the walking mechanism is used to drive the main beam to move in a straight line direction, and any tire assembly includes a steering mechanism, which is arranged at the bottom of the main beam through a support beam; a roller, which is arranged below the steering mechanism; a driving mechanism, which is arranged at the bottom of the steering mechanism and is used to drive the roller to rotate; a supporting cylinder, which is vertically arranged at the bottom of the support beam and does not contact the roller;

[0008] A support leg, which is arranged at the front end of the main beam and is hinged thereto;

[0009] Two overhead cranes are arranged on the main beam and are slidably connected thereto.

[0010] Preferably, the integrated bridge-building machine adapted to small and medium spans, the main beam comprises: a main beam frame, which is horizontally arranged; a vertical frame, which is vertically arranged in the middle of the main beam frame; two pull rods, which are obliquely arranged on both sides of the vertical frame, and any one of the pull rods connects the end of the main beam frame with the vertical frame.

[0011] Preferably, the integrated bridge-building machine adapted to small and medium spans further comprises: a slide rail, which is arranged at the bottom of the main beam along its length direction, and the tire assembly located at the rear of the main beam is slidably connected to the slide rail via a slider.

[0012] Preferably, in the integrated assembly bridge-building machine adapted to small and medium spans, the outriggers include outrigger beams, which are rotatably connected to the main beams by being driven by a first oil cylinder; and a second oil cylinder, which is arranged inside the outrigger beams along their length direction, and the second oil cylinder is configured to adjust the length of the outrigger beams.

[0013] Preferably, in the assembly-integrated bridge-erecting machine adapted to small and medium spans, the legs further include a limiting device, which is arranged at the free end of the legs and includes:

[0014] A pressure plate, which is relatively arranged outside the end of the supporting leg;

[0015] A diamond truss, which is arranged between the pressure plate and the legs, comprises four truss beams, which are hinged in pairs, and two opposite ends of the diamond truss are respectively hinged to the pressure plate and the legs, and the diamond truss is arranged so that when the two ends hinged to the pressure plate and the legs coincide, the outer end of the diamond truss protrudes from the side wall of the pressure plate or the legs;

[0016] Two connecting rods, which are arranged at the outer end points of the diamond truss and are respectively fixedly connected to two adjacent truss beams, any connecting rod is perpendicular to the corresponding truss beam and is arranged outward, and the free end of the connecting rod protrudes from the corresponding side wall of the pressure plate or the leg;

[0017] Two limiting rods, which are respectively fixed to the free ends of the two connecting rods, and any limiting rod is perpendicular to the corresponding connecting rod and is arranged inwardly;

[0018] Two stiffening rods are arranged outside the two connecting rods and are respectively hinged thereto, and the other ends of the two stiffening rods are hinged to each other.

[0019] Preferably, the integrated assembly bridge-erecting machine adapted to small and medium spans further comprises a buffer pad, which is arranged on the end surface of the supporting leg adjacent to the limiting device.

[0020] The present invention also provides a construction method of an assembly-integrated bridge erecting machine suitable for small and medium spans, comprising:

[0021] Step 1: The bridge erecting machine moves to the designated erection position through the traveling mechanism, so that the outriggers are located directly above the pier to be erected, firstly fix the tire assembly located in the middle of the main beam to the pier top adjacent to the beam block to be erected, and then drive the tire assembly located at the rear of the main beam to move along the slide rail to another pier top;

[0022] Step 2: Use two overhead cranes to lift the prefabricated pier body placed at the rear of the main beam to the front of the main beam, the rear overhead crane lowers the end of the prefabricated pier body and disconnects it, and then use the front overhead crane to install the prefabricated pier body to the designated position;

[0023] Step 3: After the installation of the prefabricated pier body is completed, both overhead cranes return to the rear of the main beam, and the front overhead crane is used to lift the pier top block and install it to the top of the prefabricated pier body to complete the installation of the pier column to be erected;

[0024] Step 4: Drive the outrigger beam to rotate to be perpendicular to the main beam through the first oil cylinder, and then drive the outrigger beam to be pressed down and supported on the pier top block through the second oil cylinder;

[0025] Step 5: Use two overhead cranes to lift the beam block to be erected at the rear of the main beam and install it between the support leg and the pier top block where the tire assembly in the middle of the main beam is located;

[0026] Step 6: Fold the legs, drive the supporting oil cylinders of the two tire assemblies to lift the rollers vertically downward to make the rollers leave the bridge deck, use the steering mechanism to drive the rollers to rotate 90 degrees, then reset the supporting oil cylinders, and then drive the rollers to move the bridge erecting machine horizontally along the width of the bridge to the next designated installation position;

[0027] Step 7: Repeat steps 1 to 6 until all piers and beams at the same length of the bridge are installed;

[0028] Step 8. Drive the supporting cylinders of the two tire assemblies vertically downward to lift the rollers off the bridge deck. Use the steering mechanism to drive the rollers to rotate 90° and then reset the supporting cylinders. Then drive the rollers to move the bridge erection machine forward along the length of the bridge to the next designated installation position. Repeat steps 1 to 7 until all the piers and beams of the bridge are erected.

[0029] Preferably, in the construction method of the integrated bridge-building machine suitable for small and medium spans, in step four, during the downward pressing process of the leg beam, the two end points of the diamond truss connected to the pressure plate and the leg gradually approach and overlap, at this time, the two connecting rods are vertically arranged along the same straight line, and the two limit rods are respectively abutted against the outer walls of the leg and the pier top block.

[0030] The present invention has at least the following beneficial effects:

[0031] 1. After the pier body and the pier top block are erected, the invention reverses and opens the legs to support them on the prefabricated pier column, and then erects the beam block, thereby improving the overall erection efficiency and construction stability of the bridge. At the same time, the design length of the legs can be greatly reduced, effectively reducing the failure rate of the legs during the erection process;

[0032] 2. The main beam of the present invention adopts a main beam frame structure with a tie rod, which reduces the material consumption and saves costs under the same main beam stiffness;

[0033] 3. The present invention uses a tire assembly to directly move on the beam surface to enter the next beam erection state (lateral movement, longitudinal movement), which improves the hole-passing efficiency, reduces the hole-passing risk, realizes the continuous erection construction of multi-pier bridges, and further improves the construction efficiency.

[0034] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an assembly-integrated bridge erecting machine suitable for small and medium spans according to an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of the main beam described in the above embodiment;

[0037] Figure 3 is a schematic structural diagram of the middle tire assembly described in the above embodiment;

[0038] Figure 4 is a schematic structural diagram of the rear tire assembly described in the above embodiment;

[0039] Figure 5 is a schematic structural diagram of the supporting legs described in the above embodiment;

[0040] Figure 6 is a schematic diagram of the structure of the limiting device described in the above embodiment;

[0041] Figure 7 It is a schematic diagram of the connection structure of the diamond truss, the connecting rod and the stiffening rod in the above embodiment.

[0042] Description of reference numerals:

[0043] 1. Overhead crane; 2. Main beam; 21. Main beam frame; 22. Vertical frame; 23. Pull rod; 3. Rear tire assembly; 31. Support beam; 32. Steering mechanism; 33. Roller; 34. Support cylinder; 35. Driving mechanism; 4. Middle tire assembly; 41. Slider; 42. Slide rail; 5. Outrigger; 51. Outrigger beam; 6. Pier column to be erected; 7. Beam block; 8. Limit device; 81. Diamond truss; 82. Connecting rod; 83. Limit rod one; 84. Limit rod two; 85. Stiffening rod; 86. Buffer pad; 87. Pressure plate. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0045] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] like Figure 1-7 As shown, the present invention provides an assembly-integrated bridge erecting machine suitable for small and medium spans, comprising:

[0047] A main beam 2, which is arranged horizontally;

[0048] A walking mechanism, which includes two tire assemblies, which are respectively arranged at the middle and rear of the main beam 2, and the walking mechanism is used to drive the main beam 2 to move in a straight line direction. Any tire assembly includes a steering mechanism 32, which is arranged at the bottom of the main beam 2 through a support beam 31; a roller 33, which is arranged below the steering mechanism 32; a driving mechanism 35, which is arranged at the bottom of the steering mechanism 32 and is used to drive the roller 33 to rotate; a supporting cylinder 34, which is vertically arranged at the bottom of the support beam 31 and does not contact the roller 33;

[0049] A support leg 5, which is arranged at the front end of the main beam 2 and is hinged thereto;

[0050] Two overhead cranes 1 are arranged on the main beam 2 and are slidably connected thereto.

[0051] In the above technical solution, the main beam 2 is arranged along the length direction of the bridge. In the initial state, the roller 33 of the walking mechanism moves in the length direction of the bridge. The tire assembly (middle tire assembly 4) in the middle of the main beam 2 is fixed relative to the main beam 2. The tire assembly divides the main beam 2 into two parts, front and rear, and provides stable support for the main beam 2 from the middle. The legs 5 are in an inward folded state, which reduces the space occupied by the bridge erection machine so as not to affect the movement of the bridge erection machine and the construction of prefabricated piers (prefabricated pier bodies and pier top blocks). In the working state, the rear of the main beam 2 is supported on the pavement structure / beam block 7 at the end of the bridge through the middle tire assembly 4 and the rear tire assembly 3, and the front of the main beam 2 extends out of the end of the completed bridge foundation structure along the length direction of the bridge, and is in a cantilever state. The length of the front of the main beam 2 needs to be less than the length of the rear of the main beam 2 to ensure that when the overhead crane 1 is used for bridge erection construction, the cantilever section of the main beam 2 will not cause the entire bridge erection machine to tip over due to excessive load. The overhead crane 1 is used for lifting, transporting and installing various bridge foundation components (prefabricated pier bodies, pier top blocks, beam blocks, etc.) located at the rear of the bridge erecting machine. After the prefabricated pier columns are installed, the outriggers 5 are reversed to open and supported on the prefabricated pier columns, thereby greatly shortening the design length of the outriggers, making the state control of the outriggers simpler and faster, and being able to better control the position of the outriggers on the prefabricated pier columns. The design spacing between the middle tire assembly 4 and the outriggers 5 on the main beam 2 is equal to the spacing between adjacent piers of the bridge. While opening the outriggers 5 and supporting them on the prefabricated pier columns, the verticality of the outriggers is also ensured, so that the outriggers 5, the middle tire assembly 4, and the rear tire assembly 3 jointly form a stable three-point support structure for the main beam 2, thereby ensuring the overall stability of the bridge erecting machine when the overhead crane 1 lifts and installs the bridge foundation structure on the main beam 2. Both tire assemblies include a steering mechanism 32, and the roller 33 and the driving mechanism 35 of the roller 33 are both arranged at the bottom of the steering mechanism 32. In the present embodiment, any tire assembly includes four rollers 33, and correspondingly there are four steering mechanisms 32, which are symmetrically arranged in pairs at the bottom of the support beam 31. The support cylinder 34 is arranged at the center point of the support beam 31 and is located on the center line of the length direction of the main beam 2. Therefore, when the support cylinder 34 is used for jacking, the main beam 2 is evenly stressed during the jacking process, thereby ensuring the stability of the bridge erection machine during jacking. When the supporting oil cylinder 34 moves downward, the main beam 2 and the walking mechanism move upward in the opposite direction as a whole, so that the rollers 33 of the two tire assemblies leave the upper surface of the beam block 7 and are in a suspended state. At this time, the steering mechanism 32 can be used to simply and quickly rotate the roller 33 and its driving mechanism 35 to a set angle (90° in this embodiment), and then the supporting oil cylinder 34 is retracted to lower the roller 33 to contact the surface of the beam block 7 to complete the in-situ steering of the roller 33, thereby realizing the continuous transverse movement of the bridge erection machine for bridge erection construction. After the beam blocks at the same length position of the bridge are erected, the same method is used to rotate the direction of the roller, so that the bridge erection machine can continue to move forward to the next construction position.During the shifting process of the bridge-building machine, no other large-scale power equipment is needed to assist, and continuous construction of the entire bridge-building construction process can be achieved, greatly improving the efficiency of the bridge-building construction.

[0052] In another technical solution, the main beam 2 of the integrated bridge erection machine suitable for small and medium spans includes: a main beam frame 21, which is horizontally arranged; a vertical frame 22, which is vertically arranged in the middle of the main beam frame 21; two tie rods 23, which are obliquely arranged on both sides of the vertical frame 22, and any tie rod 23 connects the end of the main beam frame 21 with the vertical frame 22. In the above technical solution, the main beam 2 adopts a frame structure with tie rods 23. Under the same main beam stiffness requirements, the amount of steel structure materials of the main beam can be reduced, and the bearing capacity requirements of the main beam can be met with fewer beam frames; when the structure of the main beam 2 is the same, the tie rods can better balance the unbalanced loads on both sides of the main beam frame, further enhancing the stability of the main beam structure during construction.

[0053] In another technical solution, the integrated bridge-building machine adapted to small and medium spans further includes: a slide rail 42, which is arranged at the bottom of the main beam 2 along the length direction thereof, and the tire assembly located at the rear of the main beam 2 is slidably connected to the slide rail 42 via a slider 41. Specifically, when the middle tire assembly 4 is fixed relative to the main beam 2, the rear tire assembly 3 can slide freely along the length direction of the main beam 2. Thus, under the condition that the position of the middle tire assembly is relatively fixed, the position of the rear tire assembly can be adaptively adjusted for different bridge structures or bridge spans, so that in the working state, both tire assemblies are located at the pier top position of the bridge. During the construction process, the force-bearing structure of the bridge-building machine is stable, and the pier column structure under the bridge-building machine can better provide stable support force, further improving the structural stability of the overall bridge-building machine.

[0054] In another technical solution, the assembly-integrated bridge-erecting machine adapted to small and medium spans, the outrigger 5 includes an outrigger beam 51, which is rotatably connected to the main beam 2 by a first oil cylinder drive; a second oil cylinder, which is arranged inside the outrigger beam 51 along the length direction thereof, and the second oil cylinder is arranged to adjust the length of the outrigger beam 51. Among them, the first oil cylinder and the second oil cylinder are both telescopic oil cylinders, the first oil cylinder is used to control the rotation angle of the outrigger 5 relative to the main beam 2, and the second oil cylinder is used to adjust the length of the outrigger 5. During the construction process, the first oil cylinder is first used to drive the outrigger 5 to rotate and open to a position perpendicular to the main beam 2, at which time the outrigger 5 is located above the prefabricated pier column, and then the second oil cylinder is used to drive the bottom of the outrigger 5 to move vertically downward until it abuts against the upper surface of the pier top block, so that the outrigger can be accurately and vertically supported at a specified position on the pier top block, providing a new end support point for the main beam while facilitating the installation of the subsequent beam block 7.

[0055] In another technical solution, the assembly-integrated bridge-erecting machine adapted to small and medium spans, the leg 5 further includes a limit device 8, which is arranged at the free end of the leg 5, including:

[0056] A pressure plate 87, which is relatively arranged outside the end of the support leg 5;

[0057] The diamond truss 81 is arranged between the pressing plate 87 and the supporting leg 5, and includes four truss beams, which are hinged in pairs. The two opposite ends of the diamond truss 81 are respectively hinged to the pressing plate 87 and the supporting leg 5. The diamond truss 81 is arranged so that when the two ends hinged to the pressing plate 87 and the supporting leg 5 coincide, the outer end of the diamond truss 81 protrudes from the side wall of the pressing plate 87 or the supporting leg 5;

[0058] Two connecting rods 82, which are arranged at the outer end points of the diamond truss 81 and are respectively fixedly connected to two adjacent truss beams, any connecting rod 82 is perpendicular to the corresponding truss beam and is arranged outward, and the free end of the connecting rod 82 protrudes from the corresponding pressing plate 87 or the side wall of the leg 5;

[0059] Two limiting rods, which are respectively fixed to the free ends of the two connecting rods 82, and any limiting rod is perpendicular to the corresponding connecting rod 82 and is arranged inwardly;

[0060] Two reinforcing rods 85 are arranged outside the two connecting rods 82 and are respectively hinged thereto, and the other ends of the two reinforcing rods 85 are hinged to each other.

[0061] Specifically, the limiting device 8 is used to strengthen the connection between the leg 5 and the pier top block below. The four truss beams of the diamond truss 81 are hinged to each other, so that when the bottom end of the leg 5 moves vertically downward under the drive of the second oil cylinder, the pressing plate 87 first contacts the pier top block. The length of the pressing plate 87 is the same as the length of the installation area of ​​the single beam block 7 reserved on the pier top block. After the pressing plate 87 is pressed down, it is located on the side of the pier top block close to the forward direction. The two limiting rods include a limiting rod 1 83 set toward one side of the leg beam 51 and a limiting rod 2 84 set toward one side of the pressing plate 87. During the downward folding process of the diamond truss 81, the connecting rod 82 rotates in the vertical direction with the truss beam, and at the same time, the limit rod 1 83 rotates close to the side wall of the support leg 5, and the limit rod 2 84 rotates close to the outer wall of the pier top block; after the diamond truss 81 is completely folded and the pressure plate 87 is pressed, the two connecting rods 82 rotate to the vertical position, the end of the limit rod 1 83 abuts against the outer wall of the support leg beam 51, and the end of the limit rod 2 84 abuts against the outer wall of the pier top block. Thus, when the outrigger 5 is opened and supported on the pier top block, and the overhead crane 1 is used to lift and install the beam block 7, the limit device 8 abuts against the outrigger beam 51 and the pier top block from the outside. Under the weight of the outrigger 5 and the lifting force of the second oil cylinder, the diamond truss 81 is stably in a compressed state. At this time, the connecting rod 82 and the limit rod become an integrated fixed structure for limiting the relative displacement between the outrigger 5 and the pier top block. Since the outrigger 5 is supported at the outer edge of the pier top block, the connection of the outrigger 5 near the outside is relatively unstable. When the outrigger 5 is subjected to unbalanced force during the construction of the beam block 7 to be erected, the relative displacement between the outrigger 5 and the pier top block can be reduced by the limit device 8, thereby improving the stability of the outrigger support structure. The stiffening rod 85 is used to alleviate the lateral unbalanced force on the connecting rod and prevent the connection between the connecting rod 82 and the diamond truss 81 from being damaged.

[0062] In another technical solution, the assembly-integrated bridge erecting machine adapted to small and medium spans further includes a buffer pad 86, which is arranged on the end surface of the support leg 5 adjacent to the limit device 8. The buffer pad 86 is arranged corresponding to the diamond truss 81. When the diamond truss 81 is folded, it is connected to the end surface of the support leg beam 51 through the buffer pad 86 to prevent the impact force on the support leg beam and the limit device from being too large during the downward pressing of the support leg, resulting in structural deformation.

[0063] The present invention also provides a construction method of an assembly-integrated bridge erecting machine suitable for small and medium spans, comprising:

[0064] Step 1: The bridge erecting machine moves to the designated erection position through the traveling mechanism, so that the outrigger 5 is located directly above the pier column 6 to be erected, and the tire assembly located in the middle of the main beam 2 is first fixed to the pier top adjacent to the beam block 7 to be erected, and then the tire assembly located at the rear of the main beam 2 is driven to move along the slide rail 42 to another pier top;

[0065] Among them, at the designated erection position, the main beam 2 extends out of the erected beam block 7 with the middle tire assembly 4 as the boundary, and forms a cantilever structure above the pier column 6 to be erected and the beam block 7 to be erected. The distance between the rear tire assembly 3 and the middle tire assembly 4 is adjusted according to the span of the bridge and the length of the main beam 2, and the rear tire assembly 3 is located at the pier top at a suitable distance from the middle tire assembly 4.

[0066] Step 2: Use two overhead cranes 1 to lift the prefabricated pier body placed at the rear of the main beam 2 to the front of the main beam 2, the rear overhead crane 1 lowers the end of the prefabricated pier body and disconnects it, transfers the entire weight of the prefabricated pier body to the front overhead crane 1, and then uses the front overhead crane 1 to install the prefabricated pier body to the designated position;

[0067] Among them, the bridge foundation structure to be erected (prefabricated piers, beam blocks 7, etc.) is set in advance on the rear of the main beam 2 of the bridge erecting machine or the bridge deck (beam block 7) at the rear of the bridge erecting machine, which is convenient for using the overhead crane 1 to continuously erect beams.

[0068] Step 3: After the installation of the prefabricated pier body is completed, both overhead cranes 1 return to the rear of the main beam 2, and the front overhead crane 1 is used to lift the pier top block and install it to the top of the prefabricated pier body, completing the installation of the pier column 6 to be erected;

[0069] Step 4: Use the first oil cylinder to drive the outrigger beam 51 to rotate to be perpendicular to the main beam 2, and then use the second oil cylinder to drive the outrigger beam 51 to press down and support it on the pier top block;

[0070] Step 5: Use two overhead cranes 1 to lift the beam block 7 to be erected at the rear of the main beam 2 and install it between the support leg 5 and the pier top block where the tire assembly is located in the middle of the main beam 2;

[0071] Step 6: Fold up the outriggers 5, drive the supporting cylinders 34 of the two tire assemblies to lift vertically downward to make the rollers 33 leave the bridge deck, use the steering mechanism 32 to drive the rollers 33 to rotate 90° and then reset the supporting cylinders 34 (fold up the supporting cylinders 34), and then drive the rollers 33 to move the bridge erector machine horizontally along the width direction of the bridge to the next designated installation position;

[0072] Step 7, repeat the contents of step 1 to step 6 until all piers and beam blocks 7 at the same length position of the bridge are erected;

[0073] Step 8. Drive the supporting cylinders 34 of the two tire assemblies vertically downward to lift the rollers 33 off the bridge deck. Use the steering mechanism 32 to drive the rollers 33 to rotate 90° and then reset the supporting cylinders 34. Then drive the rollers 33 to move the bridge erection machine forward along the length of the bridge to the next designated installation position. Repeat steps 1 to 7 until the erection of all bridge piers and beam blocks 7 is completed.

[0074] The bridge erection machine in the present invention can be applied to the erection of multi-pier bridges. Compared with conventional bridge erection machines, in addition to being able to continuously move the erected beams along the length direction of the bridge, the bridge erection machine can also move horizontally as a whole through the cooperation of the supporting oil cylinder 34 and the steering mechanism 32 before moving the erected beams forward along the length direction of the bridge, thereby completing the erection of multiple piers and beam blocks 7 at the same position. In the above technical scheme, the tire assembly is used to directly walk on the beam surface to enter the next beam erection state, which improves the hole-passing efficiency and reduces the hole-passing risk. In addition, the cantilever main beam 2 is first used to erect the pier body and the pier top block. After the pier body and the cap beam or the pier top block are erected, the support leg 5 is reversed to support it on the completed pier top block to erect the beam block 7, which improves the erection efficiency of the pier body and reduces the failure rate factor during the erection process.

[0075] In another technical solution, the construction method of the assembly integrated bridge erection machine suitable for small and medium spans, in step 4, during the downward pressing process of the leg beam 51, the two end points of the diamond truss 81 connected to the pressure plate 87 and the leg 5 gradually approach and overlap, at this time, the two connecting rods 82 are vertically arranged along the same straight line, and the two limiting rods are respectively in contact with the outer side walls of the leg 5 and the pier top block. In the above technical solution, through the foldable structure of the diamond truss 81 in the limiting device 8, when the leg beam 51 presses the pressure plate 87 downward under the drive of the second oil cylinder, the diamond truss 81 is naturally folded, and at the same time, the connecting rod 82 and the limiting rod connected to the diamond truss 81 rotate inward synchronously, and when the diamond truss 81 is completely folded, the two limiting rods are respectively in contact with the outer side walls of the leg 5 and the pier top block, that is, the outer side limit of the leg 5 is completed. Therefore, when the overhead crane 1 is used to erect the beam block 7, the temporary connection between the support leg 5 and the pier top block is strengthened, and because of the gravity of the second oil cylinder and the support leg beam 51 itself, the limiting structure of the limiting device is relatively stable and not prone to shaking, thereby ensuring the supporting stability of the support leg to the main beam.

[0076] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An integrated bridge erecting machine suitable for small and medium spans, characterized in that: include: The main beam is set horizontally; A walking mechanism, which includes two tire assemblies, which are respectively arranged at the middle and rear of the main beam, and the walking mechanism is used to drive the main beam to move in a straight line direction, and any tire assembly includes a steering mechanism, which is arranged at the bottom of the main beam through a support beam; a roller, which is arranged below the steering mechanism; a driving mechanism, which is arranged at the bottom of the steering mechanism and is used to drive the roller to rotate; a supporting cylinder, which is vertically arranged at the bottom of the support beam and does not contact the roller; A support leg, which is arranged at the front end of the main beam and is hinged thereto; Two overhead cranes, which are arranged on the main beam and slidably connected thereto; A slide rail is arranged at the bottom of the main beam along the length direction thereof, and the tire assembly located at the rear of the main beam is slidably connected to the slide rail via a slider; The outrigger includes an outrigger beam, which is rotatably connected to the main beam by a first oil cylinder; a second oil cylinder, which is arranged inside the outrigger beam along its length direction, and the second oil cylinder is configured to adjust the length of the outrigger beam; a limiting device, which is arranged at the free end of the outrigger, includes: A pressure plate, which is relatively arranged outside the end of the supporting leg; A diamond truss, which is arranged between the pressure plate and the legs, comprises four truss beams, which are hinged in pairs, and two opposite ends of the diamond truss are respectively hinged to the pressure plate and the legs, and the diamond truss is arranged so that when the two ends hinged to the pressure plate and the legs coincide, the outer end of the diamond truss protrudes from the side wall of the pressure plate or the legs; Two connecting rods, which are arranged at the outer end points of the diamond truss and are respectively fixedly connected to two adjacent truss beams, any connecting rod is perpendicular to the corresponding truss beam and is arranged outward, and the free end of the connecting rod protrudes from the corresponding side wall of the pressure plate or the leg; Two limiting rods, which are respectively fixed to the free ends of the two connecting rods, and any limiting rod is perpendicular to the corresponding connecting rod and is arranged inwardly; Two stiffening rods are arranged outside the two connecting rods and are respectively hinged thereto, and the other ends of the two stiffening rods are hinged to each other.

2. The integrated bridge erecting machine for small and medium spans according to claim 1 is characterized in that: The main beam comprises: a main beam frame which is horizontally arranged; a vertical frame which is vertically arranged in the middle of the main beam frame; and two tie rods which are obliquely arranged on both sides of the vertical frame, and any one of the tie rods connects the end of the main beam frame with the vertical frame.

3. The integrated bridge erecting machine for small and medium spans according to claim 1 is characterized in that: It also includes a buffer pad, which is arranged on the end surface of the supporting leg adjacent to the limiting device.

4. A construction method of an assembly-integrated bridge erecting machine suitable for small and medium spans as claimed in any one of claims 1 to 3, characterized in that: include: Step 1: The bridge erecting machine moves to the designated erection position through the traveling mechanism, so that the outriggers are located directly above the pier to be erected, firstly fix the tire assembly located in the middle of the main beam to the pier top adjacent to the beam block to be erected, and then drive the tire assembly located at the rear of the main beam to move along the slide rail to another pier top; Step 2: Use two overhead cranes to lift the prefabricated pier body placed at the rear of the main beam to the front of the main beam, the rear overhead crane lowers the end of the prefabricated pier body and disconnects it, and then use the front overhead crane to install the prefabricated pier body to the designated position; Step 3: After the installation of the prefabricated pier body is completed, both overhead cranes return to the rear of the main beam, and the front overhead crane is used to lift the pier top block and install it to the top of the prefabricated pier body to complete the installation of the pier column to be erected; Step 4: Drive the outrigger beam to rotate to be perpendicular to the main beam through the first oil cylinder, and then drive the outrigger beam to be pressed down and supported on the pier top block through the second oil cylinder; Step 5: Use two overhead cranes to lift the beam block to be erected at the rear of the main beam and install it between the support leg and the pier top block where the tire assembly in the middle of the main beam is located; Step 6: Fold the legs, drive the supporting oil cylinders of the two tire assemblies to lift the rollers vertically downward to make the rollers leave the bridge deck, use the steering mechanism to drive the rollers to rotate 90 degrees, then reset the supporting oil cylinders, and then drive the rollers to move the bridge erecting machine horizontally along the width of the bridge to the next designated installation position; Step 7: Repeat steps 1 to 6 until all piers and beams at the same length of the bridge are installed; Step 8. Drive the supporting cylinders of the two tire assemblies vertically downward to lift the rollers off the bridge deck. Use the steering mechanism to drive the rollers to rotate 90° and then reset the supporting cylinders. Then drive the rollers to move the bridge erection machine forward along the length of the bridge to the next designated installation position. Repeat steps 1 to 7 until all the piers and beams of the bridge are erected.

5. The construction method of the assembly-integrated bridge erecting machine adapted to small and medium spans as claimed in claim 4 is characterized in that: In step 4, during the downward pressing process of the leg beam, the two end points of the diamond truss connecting the pressure plate and the leg gradually approach and overlap. At this time, the two connecting rods are vertically arranged along the same straight line, and the two limit rods are respectively in contact with the outer side walls of the leg and the pier top block.

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