A method and system for quickly installing precast concrete deck of suspension bridge

Abstract

The present application relates to a method and system for quickly installing a precast concrete bridge deck of a suspension bridge, the method comprising the following steps: using a gantry crane erected on a steel beam and moving along the longitudinal direction of the bridge to hoist the bridge deck within its span and push it along the longitudinal direction of the bridge; using a truck crane traveling on the bridge deck within the span of the gantry crane to hoist the bridge deck outside the span of the gantry crane behind the gantry crane construction section and push it along the longitudinal direction of the bridge. The present application adopts a gantry crane and a truck crane to cooperate in hoisting the bridge deck, so that the hoisting construction of the bridge deck is not affected by strong time such as wet joint concrete, and the gantry crane itself has a high hoisting efficiency, and combined with the truck crane, the installation progress of the bridge deck can be greatly accelerated.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a method and system for quickly installing a precast concrete bridge deck of a suspension bridge. Background Art

[0002] A suspension bridge, also known as a suspension bridge, is a bridge that uses main cables and suspenders as a suspension system for stiffening beams to transfer loads to bridge towers and anchors. With the development of large-span bridges, suspension bridges, as the most powerful spanning bridges, are often the preferred bridge type for crossing rivers, lakes, seas, mountains and canyons. The deck system of a suspension bridge is an important part of ensuring smooth traffic and the service level of the bridge. It is a structure that directly bears the loads of vehicles and people. At present, the decks in suspension bridge structures are mostly reinforced concrete slabs and orthotropic steel plates.

[0003] In the related art, for the bridge deck system composed of steel beams and reinforced concrete bridge decks, the current conventional method of installing reinforced concrete bridge decks is: after the prefabrication production and maintenance reaches the design strength, the prefabricated bridge deck is transported to the bridge location by a flatbed transport vehicle, and is hoisted into place by a truck crane. While the bridge deck is hoisted, the shear keys and the protruding steel bars of the bridge deck are welded and fixed. After the welding is completed, the wet joint steel bars and formwork of the bridge deck are installed, and the wet joint concrete is poured. The truck crane moves forward, and then the front bridge deck is installed and the wet joint is poured. This cycle is repeated until the bridge deck installation construction is completed.

[0004] However, due to the strong time influences such as the lifting efficiency of the truck crane and wet joint concrete, the bridge deck installation construction method in the related technology has low efficiency. Summary of the invention

[0005] The embodiments of the present application provide a method and system for quickly installing a precast concrete bridge deck of a suspension bridge, so as to solve the problem in the related art of low efficiency in bridge deck installation construction due to strong time influences such as the lifting efficiency of a truck crane and wet joint concrete.

[0006] On the one hand, the present application provides a method for quickly installing a precast concrete bridge deck of a suspension bridge, and the technical solution adopted is:

[0007] A method for quickly installing a precast concrete bridge deck of a suspension bridge comprises the following steps:

[0008] Use a gantry crane erected on a steel beam and moving along the longitudinal direction of the bridge to lift the bridge deck within its span and push it along the longitudinal direction of the bridge;

[0009] Use a truck crane traveling on the bridge deck within the gantry crane span to hoist the bridge deck outside the gantry crane span behind the gantry crane construction section and push it along the longitudinal direction of the bridge.

[0010] In some embodiments, before using a gantry crane erected on a steel beam and traveling along the longitudinal direction of the bridge to hoist a bridge deck within its span and advance it along the longitudinal direction of the bridge, the method includes:

[0011] After installing the track on the hoisted steel longitudinal beam, the gantry crane is installed on the track; or,

[0012] After hoisting the steel longitudinal beams pre-installed with tracks, the gantry crane is installed on the tracks.

[0013] In some embodiments, if both ends of the bridge meet the conditions for gantry crane and truck crane lifting, a gantry crane and a truck crane are respectively installed at both ends of the bridge, and construction is carried out from both ends to the middle.

[0014] In some embodiments, if only one end of the bridge meets the conditions for gantry crane and truck crane lifting;

[0015] Starting from the one end, a bridge deck channel is constructed to the other end of the bridge using a gantry crane, and the width of the bridge deck channel is smaller than the span of the gantry crane;

[0016] The bridge deck channel is used as the bearing foundation of the truck crane, and a gantry crane and a truck crane are respectively provided at both ends of the bridge, and construction is carried out from both ends to the middle.

[0017] In some embodiments, the bridge deck channel is used as the bearing base of the truck crane, a gantry crane and a truck crane are respectively provided at both ends of the bridge, and construction is carried out from both ends to the middle, including:

[0018] A gantry crane and a truck crane are respectively provided at both ends of the bridge, wherein the truck crane is carried on the bridge deck channel;

[0019] Use gantry cranes at both ends of the bridge to lift the bridge deck within the span except for the bridge deck channel and push it toward the middle;

[0020] While the gantry crane is working, truck cranes are used at both ends of the bridge to lift the bridge deck outside the span of the gantry crane and push it towards the middle.

[0021] In some embodiments, when constructing a bridge deck channel, two bridge decks are added on both sides of the bridge deck channel at intervals of a certain length to serve as vehicle crane outrigger platforms.

[0022] In some embodiments, the bridge deck is installed symmetrically along the center line of the main bridge during installation.

[0023] In some embodiments, a winch is used to lift the bridge deck to an installation height, and the bridge deck suspended on the winch is transferred to a gantry crane via a lifting point conversion device.

[0024] In some embodiments, wet joint construction of the installed bridge deck is performed simultaneously with the construction by the gantry crane and the truck crane.

[0025] On the other hand, the present application provides a suspension bridge precast concrete bridge deck installation system, comprising:

[0026] A gantry crane is erected on a steel beam and moves along the longitudinal direction of the bridge. The gantry crane is used to lift the bridge deck within its span;

[0027] The truck crane travels on the bridge deck within the lifting span of the gantry crane. The truck crane is used to lift the bridge deck outside the gantry crane span behind the gantry crane construction section.

[0028] The beneficial effects of the technical solution provided by this application include:

[0029] 1. The gantry crane is used to hoist the bridge deck, which is not affected by strong time such as wet joint concrete, and the gantry crane itself has a high hoisting efficiency. While the gantry crane is advancing the construction along the longitudinal direction of the bridge, a truck crane is set on the bridge deck outside the span of the gantry crane on the bridge deck where the wet joint concrete reaches the design strength behind the gantry crane construction section, and the truck crane is installed together with the gantry crane to advance the construction along the longitudinal direction of the bridge to complete the installation of the entire bridge deck, which can greatly speed up the installation progress of the bridge deck.

[0030] 2. The use of winches to transport bridge decks ensures the installation progress of the bridge decks and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic diagram of the installation of the gantry crane in the embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the positions of the gantry crane and the truck crane in the construction state in the embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the installation of the winch in the embodiment of the present application;

[0035] Figure 4 It is a schematic diagram of the structure of the suspension point conversion device in the embodiment of the present application.

[0036] In the figure: 1. Steel beam; 2. Gantry crane; 3. Truck crane; 4. Winch; 5. Lifting point conversion device; 6. Bridge deck. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The embodiments of the present application provide a method and system for quickly installing precast concrete bridge decks of suspension bridges, which can solve the problem of low construction efficiency in current bridge deck installation methods due to strong time influences such as automobile crane lifting efficiency and wet joint concrete.

[0039] Reference Figure 1-4 As shown, the embodiment of the present application provides a method for quickly installing a precast concrete bridge deck 6 of a suspension bridge, comprising the following steps:

[0040] A gantry crane 2 erected on a steel beam 1 and moving along the longitudinal direction of the bridge is used to lift the bridge deck 6 within its span and advance it along the longitudinal direction of the bridge.

[0041] The truck crane 3 traveling on the bridge deck 6 within the span of the gantry crane 2 is used to hoist the bridge deck 6 outside the span of the gantry crane 2 behind the construction section of the gantry crane 2 and push it along the longitudinal direction of the bridge.

[0042] The bridge deck 6 hoisted by the gantry crane 2 is not affected by strong time such as wet joint concrete, and the gantry crane 2 itself has a high hoisting efficiency. While the gantry crane 2 is advancing the construction along the longitudinal direction of the bridge, a truck crane 3 is set on the completed bridge deck 6 behind the construction section of the gantry crane 2 to hoist the bridge deck 6 outside the span of the gantry crane 2. The truck crane 3 and the gantry crane 2 advance the construction along the longitudinal direction of the bridge together to complete the installation of the bridge deck 6 of the entire bridge, which can greatly speed up the installation progress of the bridge deck 6 and reduce the construction period and cost.

[0043] Specifically, before using the gantry crane 2 erected on the steel beam 1 and moving along the longitudinal direction of the bridge to lift the bridge deck 6 within its span and advance it along the longitudinal direction of the bridge, a track is first installed on the steel beam 1 for the gantry crane 2 to travel; in this embodiment, the steel longitudinal beam is used as the track foundation of the gantry crane 2, and the track can be hoisted on the steel longitudinal beam through a catwalk crane after the hoisting construction of the steel longitudinal beam is completed, or the track can be pre-installed on the steel longitudinal beam when the steel beam 1 segment is hoisted, and then hoisted into place together with the steel longitudinal beam. The specific method can be selected according to actual construction needs.

[0044] When installing the gantry crane 2, the existing cable crane of the suspension bridge can be used to hoist the gantry crane 2 as a whole onto the track to complete the installation, or when the end of the steel beam 1 meets the vehicle transportation conditions, the gantry crane 2 can be directly assembled on site at the beam end and the installation can be completed. The construction method is also selected according to the actual construction conditions.

[0045] If both ends of the bridge meet the lifting conditions of the gantry crane 2 and the truck crane 3, a gantry crane 2 and a truck crane 3 are respectively installed at both ends of the bridge, and the lifting construction of the bridge deck 6 is carried out from both ends of the bridge to the middle.

[0046] If only one end of the bridge meets the lifting conditions of the gantry crane 2 and the automobile crane 3, then starting from this end, use the gantry crane 2 to construct a bridge deck 6 channel to the other end, and the width of the bridge deck 6 channel is smaller than the span of the gantry crane 2. Then, use the bridge deck 6 channel as the bearing foundation of the automobile crane 3, equip the automobile crane 3 and the gantry crane 2 at both ends of the bridge, and carry out the lifting construction of the bridge deck 6 from both ends to the middle. The width of the bridge deck 6 channel must be able to accommodate the automobile crane 3, and in order to ensure the stability of the automobile crane 3 during lifting, when constructing the bridge deck 6 channel, two bridge decks 6 are added on both sides of the bridge deck 6 channel at intervals as the support leg platform of the automobile crane 3.

[0047] Specifically, when a gantry crane 2 and a truck crane 3 are respectively provided at both ends of the bridge, the truck crane 3 is carried on the bridge deck 6 channel, and the gantry cranes 2 at both ends of the bridge are used to lift the bridge deck 6 within its span except the bridge deck 6 channel, and push it toward the middle. At the same time, the truck cranes 3 on the bridge deck 6 channels at both ends of the bridge are used to lift the bridge deck 6 outside the span of the gantry crane 2, and push it toward the middle.

[0048] When laying the bridge deck 6, in order to ensure that the steel beam 1 is not subjected to unbalanced load, the bridge deck 6 is installed symmetrically along the center line of the main bridge.

[0049] When the gantry crane 2 and the truck crane 3 are hoisting and constructing the bridge deck 6, the wet joint construction of the installed bridge deck 6 is carried out simultaneously, and the truck crane 3 travels on the bridge deck 6 whose wet joint concrete reaches the designed strength.

[0050] The bridge deck 6 can be hoisted from the ground to the installation height by the hoisting machine 4, and then the bridge deck 6 on the hoisting machine 4 is transferred to the gantry crane 2 or the truck crane 3 by the hoisting point conversion device 5; specifically, the hoisting machine 4 is installed on the steel beam 1 at the end of the bridge, and the bridge deck 6 is transported to the bridge position on the ground by a flatbed transporter, and then the hoisting machine 4 hoists the bridge deck 6 to the installation height. The cooperation between the hoisting machine 4 and the flatbed transporter can speed up the transportation progress of the bridge deck 6, thereby improving the construction efficiency.

[0051] The embodiment of the present application also provides a system for installing a precast concrete bridge deck 6 of a suspension bridge, including a gantry crane 2 and a truck crane 3 .

[0052] The gantry crane 2 is erected on the steel beam 1 and moves along the longitudinal direction of the bridge, and is used to hoist the bridge deck 6 within the span; specifically, a track for the gantry crane 2 to move is provided on the steel beam 1, and the gantry track is installed on the steel longitudinal beam.

[0053] The truck crane 3 travels on the bridge deck 6 within the span of the gantry crane 2, and is used to hoist the bridge deck 6 outside the span of the gantry crane 2 behind the construction section of the gantry crane 2; specifically, the truck crane 3 travels on the bridge deck 6 whose wet joint concrete reaches the design strength within the span of the gantry crane 2 behind the construction section of the gantry crane 2.

[0054] It also includes a winch 4, which is arranged on the steel beam 1 at the end of the bridge. The winch 4 is used to lift the bridge deck 6 from the ground to the installation height, and transfer the bridge deck 6 on the winch 4 to the gantry crane 2 or the truck crane 3 through the lifting point conversion device 5.

[0055] In this embodiment, the lifting point conversion device 5 is a triangular lifting device with three lifting holes formed thereon.

[0056] During actual construction, a group of gantry cranes 2 and truck cranes 3 are respectively provided at both ends of the bridge, and the gantry cranes 2 and truck cranes 3 carry out construction from both ends of the bridge toward the middle.

[0057] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 application and simplifying the description, rather than indicating or implying 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 application. Unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0058] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0059] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for quickly installing a precast concrete deck of a suspension bridge, characterized in that: The following steps are involved: A gantry crane (2) erected on a steel beam (1) and moving along the longitudinal direction of the bridge is used to hoist a bridge deck (6) within its span and to advance it along the longitudinal direction of the bridge; A truck crane (3) traveling on a bridge deck (6) within the span of a gantry crane (2) is used to hoist the bridge deck (6) outside the span of the gantry crane (2) behind the construction section of the gantry crane (2) and to advance it along the longitudinal direction of the bridge.

2. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 1 is characterized in that: Before the gantry crane (2) erected on the steel beam (1) and moving along the longitudinal direction of the bridge is used to hoist the bridge deck (6) within its span and advance it along the longitudinal direction of the bridge, the method includes: After installing the rails on the hoisted steel longitudinal beams, the gantry crane (2) is installed on the rails; or, After hoisting the steel longitudinal beam pre-installed with the track, the gantry crane (2) is installed on the track.

3. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 1 is characterized in that: If both ends of the bridge meet the conditions for the gantry crane (2) and the truck crane (3) to lift, a gantry crane (2) and a truck crane (3) are respectively installed at both ends of the bridge, and construction is carried out from both ends to the middle.

4. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 1 is characterized in that: If only one end of the bridge meets the lifting conditions of the gantry crane (2) and the truck crane (3); Starting from the one end, a gantry crane (2) is used to construct a bridge deck (6) passage to the other end of the bridge, and the width of the bridge deck (6) passage is smaller than the span of the gantry crane (2); The bridge deck (6) channel is used as the bearing foundation of the truck crane (3), and a gantry crane (2) and a truck crane (3) are respectively provided at both ends of the bridge, and construction is carried out from both ends toward the middle.

5. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 4 is characterized in that: The bridge deck (6) channel is used as the bearing foundation of the truck crane (3), a gantry crane (2) and a truck crane (3) are respectively provided at both ends of the bridge, and construction is carried out from both ends to the middle, including: A gantry crane (2) and a truck crane (3) are respectively provided at both ends of the bridge, wherein the truck crane (3) is supported on a channel of the bridge deck (6); Using gantry cranes (2) at both ends of the bridge to hoist the bridge deck (6) within the span except for the bridge deck (6) passage, and push it toward the middle; While the gantry crane (2) is under construction, at both ends of the bridge, a truck crane (3) is used to hoist the bridge deck (6) outside the span of the gantry crane (2) and push it toward the middle.

6. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 4 is characterized by: When constructing the bridge deck (6) passage, two additional bridge decks (6) are laid at intervals on both sides of the bridge deck (6) passage as outrigger platforms for the automobile crane (3).

7. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 1 is characterized by: The bridge deck (6) is installed symmetrically along the center line of the main bridge.

8. The rapid installation method of the precast concrete deck of a suspension bridge according to claim 1 is characterized by: The bridge deck (6) is hoisted to the installation height by using a hoisting machine (4), and the bridge deck (6) suspended on the hoisting machine (4) is transferred to the gantry crane (2) by using a hoisting point conversion device (5).

9. The method for rapid installation of a precast concrete deck of a suspension bridge according to any one of claims 1 to 8, characterized in that: When the gantry crane (2) and the truck crane (3) are in construction, the wet joint construction of the installed bridge deck (6) is carried out simultaneously.

10. A suspension bridge precast concrete deck installation system, characterized in that: include: A gantry crane (2) is erected on the steel beam (1) and moves along the longitudinal direction of the bridge, and the gantry crane (2) is used to hoist the bridge deck (6) within its span; A mobile crane (3) travels on a bridge deck (6) within the lifting span of a gantry crane (2), and the mobile crane (3) is used to lift the bridge deck (6) outside the span of the gantry crane (2) behind the construction section of the gantry crane (2).

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