A method for erecting a multi-layer viaduct

Abstract

The application discloses a kind of multi-layer viaduct erection construction method, equipment including beam lifting machine, bridge erecting machine, upper layer beam transport vehicle, lower layer beam transport vehicle and lower guide beam are used;Portal beam lifting machine is lifted to bridge on beam transport vehicle, beam transport vehicle transports bridge to the vicinity of bridge erecting machine, beam transport vehicle is sent to specified beam lifting position with guide beam, then bridge erecting machine lifts bridge, and bridge is dropped in specified position.Installation sequence is according to first installation bottom bridge, then upper layer bridge is installed one by one.Construction method includes bottom bridge erection procedure, upper layer bridge erection procedure and bridge erecting machine hole passing procedure, and the above three procedures are operated cyclically.The application can greatly reduce the procurement cost of construction equipment, improve construction economic benefits;Can reduce the number of on-site construction personnel, improve the efficiency of human resources use;Avoid multiple equipment cross construction, greatly improve construction safety;All construction is carried out on bridge and pier, and does not affect ground traffic and environment.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and in particular relates to a method for constructing multi-level viaducts. Background Technology

[0002] With the development of transportation, urban expressways, rail transit and other transportation facilities are increasing. Due to the constraints of urban space, urban transportation has gradually developed into a system where two-level and multi-level expressways and rail transit are built together on viaducts. The upper level is the expressway, the middle level is the rail transit, and the lower level is the road traffic. As a result, the structure of viaducts is more complex and the construction is more difficult.

[0003] To improve the efficiency and quality of bridge construction, a construction method of prefabrication in the factory and hoisting on site is generally adopted. Conventional hoisting usually uses large-tonnage truck cranes to lift objects from the ground. The cranes require large tonnage and have high requirements for ground space and load-bearing capacity. Moreover, multi-story bridges are stacked and intersecting, resulting in limited hoisting space, difficulty in crane positioning, and many interference problems. Summary of the Invention

[0004] In order to solve the problems in the prior art, the present invention provides a method for constructing multi-level viaducts.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for constructing a multi-level viaduct, using equipment including: a beam lifting machine, a bridge erecting machine, an upper-level beam transport vehicle, a lower-level beam transport vehicle, and a lower guide beam; The bridge erecting machine mainly consists of the main beam, leg 1, leg 2, leg 3, leg 4, front crane, and rear crane; The upper beam transport vehicle mainly consists of a front vehicle and a rear vehicle; the lower beam transport vehicle mainly consists of a front vehicle and a rear vehicle, and both the front and rear vehicles of the lower beam transport vehicle are equipped with hydraulic conversion mechanisms, enabling the lower beam transport vehicle to run on the guide beam. The lower guide beam has a box-shaped structure; The initial equipment layout is as follows: a beam lifting machine is set up at the starting position of the line, and three spans of bottom beams and two spans of upper beams are pre-erected; an upper beam transport vehicle is set up on the upper beams for transporting the upper bridge; a lower beam transport vehicle and a lower guide beam are set up on the bottom beams for transporting the bottom bridge; a bridge erecting machine is set up at the pier caps of the upper beam piers for installing and erecting the upper and bottom bridges; the beam lifting machine is used to lift the upper and bottom bridges onto the beam transport vehicle on the bridge deck. The construction method for multi-level viaducts includes the erection of the bottom layer bridge, the erection of the upper layer bridge, and the bridge erecting machine passing through the span. The above three processes are carried out in a cycle. The construction process for the underlying bridge includes the following steps: (1) The lower beam transport vehicle transports the lower guide beam to the position to be erected, so that the lower guide beam cantilevered a certain distance in front of it; (2) The lower beam transport vehicle detaches from the lower guide beam and moves back to below the beam lifting machine. The beam lifting machine lifts the lower bridge and places it on the lower beam transport vehicle. (3) The front and rear vehicles of the lower beam transport vehicle are driven synchronously to transport the bridge to the vicinity of the lower guide beam. Adjust the hydraulic conversion mechanism of the front vehicle of the lower beam transport vehicle so that the front vehicle of the lower beam transport vehicle falls on the lower guide beam. (4) The front and rear vehicles of the lower beam transport vehicle continue to move forward synchronously until the lifting point at the front end of the bridge completely avoids the pier cap; (5) The overhead crane of the bridge erecting machine lifts the front end of the bridge; (6) Adjust the hydraulic conversion mechanism of the rear carriage of the lower beam transport vehicle so that the rear carriage of the lower beam transport vehicle falls on the lower guide beam; (7) The bridge erecting machine’s front crane and the lower beam transport vehicle move forward in sync until the lifting point at the rear end of the bridge completely avoids the pier cap. (8) The overhead crane behind the bridge erecting machine lifts the rear end of the bridge until the bridge is completely separated from the lower guide beam; (9) The front and rear vehicles of the lower beam transport vehicle move backward synchronously, and the hydraulic conversion mechanism of the front and rear vehicles is adjusted. The lower beam transport vehicle lifts the lower guide beam and moves it to the rear to make room for the bridge installation. (10) The bridge erecting machine and the front and rear cranes simultaneously lower the beams to complete the erection of the bottom span beam; The construction process for the superstructure bridge includes the following steps: (1) The upper beam transport vehicle moves to the bottom of the beam lifting machine, and the beam lifting machine lifts the upper bridge and places it on the upper beam transport vehicle; (2) The front and rear vehicles of the upper beam transport vehicle move synchronously to transport the bridge to the vicinity of the bridge erecting machine. The front crane of the bridge erecting machine lifts the front lifting point of the bridge. The front crane of the bridge erecting machine and the rear vehicle of the upper beam transport vehicle move forward synchronously until the rear lifting point of the bridge is located below the rear crane of the bridge erecting machine. The rear crane of the bridge erecting machine lifts the rear lifting point of the bridge. (3) The bridge erecting machine lifts the bridge and moves forward until it reaches the designated beam placement position. The bridge erecting machine then lowers the beam simultaneously to complete the upper bridge erection. The bridge erecting machine's passage through the hole process includes the following steps: (1) After the bridge erecting machine completes the upper bridge, it prepares to erect the next span across the span; (2) First, move the front and rear overhead cranes above leg 3, drive the traveling rollers of legs 2 and 3, and the main beam of the bridge erecting machine moves forward until leg 1 reaches the next pier; (3) Operate leg 1 to support the bridge pier, move the front and rear cranes to above leg 1, and operate leg 4 to support inside the bridge; (4) Disengage leg 3 and move forward to the next pier support position, and support leg 3 after it is in place; (5) Remove leg #2 and move forward to behind leg #1, then support leg #2 once in position; (6) Unload legs 1 and 4, drive legs 2 and 3 to travel rollers, the main beam of the bridge erecting machine completes one span forward and is adjusted to the beam erecting state, ready to erect the next span.

[0006] Furthermore, the beam lifting machine is a gantry beam lifting machine.

[0007] The beneficial effects of this invention are: (1) This invention can effectively solve the problems of difficult crane positioning and insufficient hoisting space in traditional crane hoisting construction, and has little impact on surrounding traffic. It is a safe, efficient and low-cost construction method.

[0008] (2) This invention can greatly reduce the procurement cost of construction equipment and improve the economic benefits of construction. The equipment used in this invention can be purchased in one go and is applicable to the construction of various bridges.

[0009] (3) This invention can reduce the number of on-site construction personnel and improve the efficiency of human resource utilization. The equipment used in this invention has a high degree of automation and can be connected for data communication to achieve centralized control. Only a few auxiliary personnel are needed on-site to meet the construction needs.

[0010] (4) This invention avoids the cross-construction of multiple equipment, which greatly improves construction safety.

[0011] (5) This invention does not affect ground traffic or the environment. All construction work of this invention is carried out on bridges and piers, and does not affect ground traffic or the environment. Attached Figure Description

[0012] Figure 1 This is an overall layout diagram of the equipment used for erecting multi-level viaducts according to the present invention; Figure 2 This is a layout diagram of the bridge erecting machine in this invention.

[0013] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] like Figures 1 to 2As shown, this embodiment provides a method for constructing a multi-level viaduct. The equipment used in this method includes: a gantry crane 1, a bridge erecting machine 2, an upper-level beam transport vehicle 3, a lower-level beam transport vehicle 4, and a lower guide beam 5. Through the cooperation of the bridge erecting machine, the beam transport vehicle, and the lower guide beam, the construction of the multi-level viaduct is achieved. The bridge erecting machine 2 is mainly composed of the main beam 8, leg 1 9, leg 2 10, leg 3 11, leg 4 12, front crane 13 and rear crane 14, and can realize the functions of lifting beams, lowering beams, lateral movement of the whole machine, and self-passing through the hole.

[0016] The upper-level beam transport vehicle 3 mainly consists of a front vehicle and a rear vehicle. It can run in the U-shaped channel or on the bridge deck of the box girder bridge.

[0017] The lower-level beam transport vehicle 4 mainly consists of a front vehicle and a rear vehicle, which can run in the U-shaped channel or on the bridge deck of the box girder bridge. Both the front and rear vehicles of the lower-level beam transport vehicle 4 are equipped with hydraulic conversion mechanisms, enabling the lower-level beam transport vehicle to run on the guide beam. The lower guide beam 5 is a box-shaped structure. By cooperating with the lower beam transport vehicle 4, it can realize cantilever beam feeding and movement functions.

[0018] The initial equipment layout is as follows: A gantry crane 1 is set up at the starting position of the line, and three spans of bottom beams and two spans of upper beams are pre-erected to facilitate the crane lifting the upper and bottom bridges onto the bridge deck. An upper beam transport vehicle 3 is set up on the upper beams to transport the upper bridge 6; a lower beam transport vehicle 4 and a lower guide beam 5 are set up on the bottom beams to transport the bottom bridge 7; a bridge erecting machine 2 is set up at the pier caps of the upper beams to install and erect the upper bridge 6 and the bottom bridge 7; the gantry crane 1 is used to lift the upper bridge 6 and the bottom bridge 7 onto the transport vehicle on the bridge deck. The equipment operates as follows: the gantry crane lifts the bridge beam onto the beam transport vehicle, which then transports the bridge to the vicinity of the bridge erecting machine. The beam transport vehicle, in conjunction with the guide beam, moves the bridge to the designated lifting position. The bridge erecting machine then lifts the bridge, moves the entire machine laterally into place, and lowers the bridge into the designated position. The installation sequence follows this order: first, install the bottom layer of the bridge, then install the top layer.

[0019] Specifically, the construction method for multi-level viaducts includes the erection of the lower-level bridge, the erection of the upper-level bridge, and the bridge erecting machine passing through the span. These three processes are repeated to complete the erection of the entire multi-level viaduct.

[0020] The construction process for the underlying bridge includes the following steps: (1) The lower beam transport vehicle 4 transports the lower guide beam 5 to the position to be erected, so that the lower guide beam 5 can be cantilevered a certain distance in front of it; (2) The lower beam transport vehicle 4 detaches from the lower guide beam 5 and moves back to below the gantry lifting machine 1. The gantry lifting machine 1 lifts the bottom bridge 7 and places it on the lower beam transport vehicle 4. (3) The front and rear vehicles of the lower beam transport vehicle 4 are driven synchronously to transport the bridge to the vicinity of the lower guide beam 5. The hydraulic conversion mechanism of the front vehicle of the lower beam transport vehicle 4 is adjusted so that the front vehicle of the lower beam transport vehicle 4 falls on the lower guide beam 5. (4) The front and rear vehicles of the lower beam transport vehicle 4 continue to move forward synchronously until the lifting point at the front end of the bridge completely avoids the pier cap. (5) The front crane 13 of the bridge erecting machine 2 lifts the front end of the bridge; (6) Adjust the hydraulic conversion mechanism of the rear carriage of the lower beam transport vehicle 4 so that the rear carriage of the lower beam transport vehicle 4 falls on the lower guide beam 5; (7) The front crane 13 of the bridge erecting machine 2 and the rear crane of the lower beam transport vehicle 4 move forward synchronously until the lifting point of the rear end of the bridge completely avoids the pier cap. (8) The rear carriage 14 of the bridge erecting machine 2 lifts the rear end of the bridge until the bridge is completely separated from the lower guide beam 5. (9) The front and rear vehicles of the lower beam transport vehicle 4 move backward synchronously, and the hydraulic conversion mechanism of the front and rear vehicles is adjusted. The lower beam transport vehicle 4 lifts the lower guide beam 5 and moves it to the rear to make room for the installation of the bridge. (10) The front crane 13 and the rear crane 14 of the bridge erecting machine 2 simultaneously lower the beam to complete the erection of the bottom span beam; The construction process for the superstructure bridge includes the following steps: (1) The upper beam transport vehicle 3 moves to below the gantry crane 1, and the gantry crane 1 lifts the upper bridge 6 and places it on the upper beam transport vehicle 3; (2) The front and rear vehicles of the upper beam transport vehicle 3 move synchronously to transport the bridge to the vicinity of the bridge erecting machine 2. The front crane of the bridge erecting machine 2 lifts the front lifting point of the bridge. The front crane 13 of the bridge erecting machine 2 and the rear vehicle of the upper beam transport vehicle 3 move forward synchronously until the rear lifting point of the bridge is located below the rear crane of the bridge erecting machine 2. The rear crane of the bridge erecting machine 2 lifts the rear lifting point of the bridge. (3) The front crane 13 and the rear crane 14 of the bridge erecting machine 2 lift the bridge and move forward until they reach the designated beam placement position. The front crane 13 and the rear crane 14 of the bridge erecting machine 2 then lower the beam simultaneously to complete the erection of the upper bridge. The bridge erecting machine's passage through the hole process includes the following steps: (1) After the bridge erecting machine 2 completes the upper bridge, it is ready to erect the next span through the span; (2) First, move the front trolley 13 and the rear trolley 14 above the No. 3 leg 11, drive the No. 2 leg 10 and the No. 3 leg 11 traveling mechanism, and the main beam 8 of the bridge erecting machine moves forward until the No. 1 leg 9 reaches the next pier. (3) Operate leg 19 to support the bridge pier, move front crane 13 and rear crane 14 to above leg 1, and operate leg 412 to support inside the bridge; (4) Disengage leg 3 11 and move forward to the next pier support position, and support leg 3 11 after it is in place; (5) Remove leg 2 (10) and move forward to behind leg 1 (9), and support leg 2 (9) after it is in position; (6) Unload leg 1 (9) and leg 4 (12), drive leg 2 (10) and leg 3 (11) to travel the rollers, the main beam 8 of the bridge erecting machine completes one span forward and is adjusted to the beam erecting state, ready to erect the next span.

[0021] This invention is not limited to double-layer U-shaped beams, but is also applicable to multi-layer U-shaped beam viaducts, as well as multi-layer box girder viaducts and multi-layer T-shaped beam viaducts.

[0022] This invention can also be applied to the demolition and replacement of multi-story U-shaped or box-shaped bridges.

[0023] This invention can greatly reduce the procurement cost of construction equipment and improve the economic benefits of construction; it can reduce the number of on-site construction personnel and improve the efficiency of human resource utilization; it avoids the cross-construction of multiple equipment and greatly improves construction safety; all construction is carried out on bridges and piers, without affecting ground traffic and the environment.

[0024] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0025] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A method for constructing a multi-level viaduct, characterized in that: The equipment used in the construction method of multi-level viaducts includes: beam lifting machine, bridge erecting machine, upper-level beam transport vehicle, lower-level beam transport vehicle, and lower guide beam; The bridge erecting machine mainly consists of the main beam, leg 1, leg 2, leg 3, leg 4, front crane, and rear crane; The upper beam transport vehicle mainly consists of a front vehicle and a rear vehicle; the lower beam transport vehicle mainly consists of a front vehicle and a rear vehicle, and both the front and rear vehicles of the lower beam transport vehicle are equipped with hydraulic conversion mechanisms, enabling the lower beam transport vehicle to run on the guide beam. The lower guide beam has a box-shaped structure; The initial equipment layout is as follows: a beam lifting machine is set up at the starting position of the line, and three spans of bottom beams and two spans of upper beams are pre-erected; an upper beam transport vehicle is set up on the upper beams for transporting the upper bridge; a lower beam transport vehicle and a lower guide beam are set up on the bottom beams for transporting the bottom bridge; a bridge erecting machine is set up at the pier caps of the upper beam piers for installing and erecting the upper and bottom bridges; the beam lifting machine is used to lift the upper and bottom bridges onto the beam transport vehicle on the bridge deck. The construction method for multi-level viaducts includes the erection of the bottom layer bridge, the erection of the upper layer bridge, and the bridge erecting machine passing through the span. The above three processes are carried out in a cycle. The construction process for the underlying bridge includes the following steps: (1) The lower beam transport vehicle transports the lower guide beam to the position to be erected, so that the lower guide beam cantilevered a certain distance in front of it; (2) The lower beam transport vehicle detaches from the lower guide beam and moves back to below the beam lifting machine. The beam lifting machine lifts the lower bridge and places it on the lower beam transport vehicle. (3) The front and rear vehicles of the lower beam transport vehicle are driven synchronously to transport the bridge to the vicinity of the lower guide beam. Adjust the hydraulic conversion mechanism of the front vehicle of the lower beam transport vehicle so that the front vehicle of the lower beam transport vehicle falls on the lower guide beam. (4) The front and rear vehicles of the lower beam transport vehicle continue to move forward synchronously until the lifting point at the front end of the bridge completely avoids the pier cap; (5) The overhead crane of the bridge erecting machine lifts the front end of the bridge; (6) Adjust the hydraulic conversion mechanism of the rear carriage of the lower beam transport vehicle so that the rear carriage of the lower beam transport vehicle falls on the lower guide beam; (7) The bridge erecting machine’s front crane and the lower beam transport vehicle move forward in sync until the lifting point at the rear end of the bridge completely avoids the pier cap. (8) The overhead crane behind the bridge erecting machine lifts the rear end of the bridge until the bridge is completely separated from the lower guide beam; (9) The front and rear vehicles of the lower beam transport vehicle move backward synchronously, and the hydraulic conversion mechanism of the front and rear vehicles is adjusted. The lower beam transport vehicle lifts the lower guide beam and moves it to the rear to make room for the bridge installation. (10) The bridge erecting machine and the front and rear cranes simultaneously lower the beams to complete the erection of the bottom span beam; The construction process for the superstructure bridge includes the following steps: (1) The upper beam transport vehicle moves to the bottom of the beam lifting machine, and the beam lifting machine lifts the upper bridge and places it on the upper beam transport vehicle; (2) The front and rear vehicles of the upper beam transport vehicle move synchronously to transport the bridge to the vicinity of the bridge erecting machine. The front crane of the bridge erecting machine lifts the front lifting point of the bridge. The front crane of the bridge erecting machine and the rear vehicle of the upper beam transport vehicle move forward synchronously until the rear lifting point of the bridge is located below the rear crane of the bridge erecting machine. The rear crane of the bridge erecting machine lifts the rear lifting point of the bridge. (3) The bridge erecting machine lifts the bridge and moves forward until it reaches the designated beam placement position. The bridge erecting machine then lowers the beam simultaneously to complete the upper bridge erection. The bridge erecting machine's passage through the hole includes the following steps: (1) After the bridge erecting machine completes the upper bridge, it prepares to erect the next span across the span; (2) First, move the front and rear overhead cranes above leg 3, drive the traveling rollers of legs 2 and 3, and the main beam of the bridge erecting machine moves forward until leg 1 reaches the next pier; (3) Operate leg 1 to support the bridge pier, move the front and rear cranes to above leg 1, and operate leg 4 to support inside the bridge; (4) Disengage leg 3 and move forward to the next pier support position, and support leg 3 after it is in place; (5) Remove leg #2 and move forward to behind leg #1, then support leg #2 once in position; (6) Unload legs 1 and 4, drive legs 2 and 3 to travel rollers, the main beam of the bridge erecting machine completes one span forward and is adjusted to the beam erecting state, ready to erect the next span.

2. The method for constructing a multi-level viaduct according to claim 1, characterized in that: The lifting machine is a gantry crane.

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