A bridge deck installation process based on a mobile platform

Abstract

The present invention discloses a bridge panel installation process based on a mobile platform, which includes the following steps: Step 1, installing the bridge panel at the abutment by means of a crawler crane under the bridge; Step 2, installing the mobile platform on the steel beam of the pier according to the design requirements, which has the function of moving along the longitudinal direction of the bridge, and the lifting range of the crawler crane on the mobile platform covers the entire transverse direction of the bridge in the transverse direction; Step 3, the crawler crane moves to the mobile platform, and installs the bridge panel of the corresponding range within its lifting range; Step 4, after the crawler crane completes the installation of the bridge panel at the current position, it moves the mobile platform longitudinally to the next position, and continues to complete the installation of the bridge panel at the next position by means of the crawler crane; Step 5, repeating the above steps 3 and 4 until the installation of all bridge panels is completed. The installation process of the present invention avoids the risk of cracking caused by the direct participation of the bridge panel in the stress, while reducing the investment in large-scale lifting equipment, saving construction costs, and accelerating construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate composite beam bridge deck installation, and more particularly to a bridge deck installation process based on a movable platform. Background Art

[0002] In recent years, steel plate composite beams have been widely used in highway and urban bridge construction due to their ease of construction, rational structural load-bearing, energy-saving, and environmentally friendly advantages. As a crucial component of the superstructure, the installation of the bridge deck is a critical step in construction, impacting not only the bridge's visual linearity but also its intrinsic quality and service life, making it a key area of ​​quality control. Currently, bridge deck installation methods vary depending on factors such as the construction environment and pier height. For high piers, decks are typically laid on the bridge deck using a crane or gantry crane, while for low piers, decks are typically hoisted and laid directly beneath the bridge. Where terrain conditions are limited and large cranes are not suitable for underbridge operations, the use of a crane or gantry crane for deck installation is more suitable. However, this requires frequent installation and removal of the crane, resulting in high costs and low efficiency. Using lightweight cranes such as truck cranes to access the bridge deck can lead to excessive tensile stresses in the deck, posing a risk of cracking and compromising structural safety. Summary of the Invention

[0003] One purpose of the present invention is to provide a bridge deck installation process based on a mobile platform, which effectively solves the problem that the bridge deck does not directly participate in the stress when the lifting equipment moves and operates normally on the bridge deck, avoids the risk of cracking caused by the bridge deck directly participating in the stress, and at the same time reduces the investment in large-scale lifting equipment, saves construction costs, and speeds up construction efficiency.

[0004] In order to achieve these objects and other advantages according to the present invention, a bridge deck installation process based on a movable platform is provided, comprising the following steps:

[0005] Step 1: Install the bridge deck at the abutment using a crawler crane under the bridge;

[0006] Step 2: Install a mobile platform on the steel beam of the bridge pier according to the design requirements. The platform has the function of moving along the longitudinal direction of the bridge. The crawler crane on the mobile platform has a lifting range that covers the entire transverse direction of the bridge.

[0007] Step 3: The crawler crane moves to the mobile platform and installs the bridge deck of the corresponding range within its lifting range;

[0008] Step 4: After the crawler crane completes the bridge deck installation work at the current location, the mobile platform is moved longitudinally to the next location, and the crawler crane is used to continue the bridge deck installation work at the next location;

[0009] Step 5. Repeat steps 3 and 4 above until all bridge panels are installed.

[0010] Preferably, multiple groups of mobile platforms are provided, and the multiple groups of mobile platforms are arranged in sequence along the longitudinal direction of the bridge and are temporarily rigidly fixed to each other as a whole. The crawler crane sequentially lifts the group of mobile platforms at the rear of the bridge deck laying to the front of the bridge deck laying, and the mobile platforms are directly moved in the longitudinal direction of the bridge through the crawler crane.

[0011] Preferably, the mobile platform is supported on the steel beam of the pier by four legs, and the four legs are longitudinally provided with transverse braces in the transverse direction of the bridge, longitudinal braces in the longitudinal direction of the bridge and planks on the longitudinal braces, which are used to support the crawler crane and provide a moving range of the crawler crane, and the legs are detachably connected to the steel beam of the pier.

[0012] Preferably, the legs are placed on the steel beam at the shear stud notches and central wet joint.

[0013] Preferably, the specific method of installing the mobile platform in step 2 is: first, hoist the four legs to the set position, and then hoist and install the transverse braces in the transverse direction of the bridge, the longitudinal braces in the longitudinal direction of the bridge, and the planks set on the longitudinal braces to the legs and perform temporary rigid fixed connections to form an integral mobile platform structure.

[0014] Preferably, when moving the mobile platform longitudinally, the connection between the legs of the mobile platform and the steel beams of the bridge pier is released, and then the mobile platform is hoisted as a whole to the forward direction of the bridge deck laying by a crawler crane. According to the design requirements, all the redundant mobile platforms behind the bridge deck laying are hoisted to the front of the laying, and then the multiple groups of mobile platforms are temporarily rigidly fixed and connected as a whole.

[0015] Preferably, the movable platforms are arranged in four groups.

[0016] Preferably, the bridge deck to be erected is moved by a flatbed truck under the bridge to just below the lifting position of the crawler crane, and the bridge deck is directly lifted and installed by the crawler crane.

[0017] Preferably, the movable platform is always mounted on the steel beam corresponding to the installed bridge deck.

[0018] The present invention has at least the following beneficial effects:

[0019] The installation process of the present invention is simple to operate and easy to implement. It avoids the investment of large-scale lifting equipment such as bridge cranes or gantry cranes, effectively saves costs, reduces construction difficulty, and speeds up construction efficiency. At the same time, the lifting equipment is not in direct contact with the bridge deck, avoiding the risk of cracking caused by direct stress on the bridge deck, improving the installation quality of the bridge deck, and ensuring the safety of the structure.

[0020] 1. Compared with the conventional method of laying and installing bridge decks on the bridge deck using a bridge crane or a gantry crane, the installation process of the present invention reduces the entry and exit installation and removal costs of large equipment, overcomes the shortcomings of many turnover times and low efficiency, saves construction equipment costs, and speeds up construction efficiency.

[0021] 2. Compared with the conventional method of installing bridge decks on the bridge deck using light lifting equipment such as car cranes, the installation process of the present invention uses crawler cranes in conjunction with mobile platforms to install bridge decks, avoiding direct contact between the lifting equipment and the bridge deck. The lifting equipment can move and operate normally on the bridge deck, and the bridge deck is not directly subjected to stress, thereby avoiding the risk of cracking caused by direct participation of the bridge deck in the stress, protecting the bridge deck from damage, improving the installation quality of the bridge deck, and ensuring the safety of the structure.

[0022] Other advantages, objectives and features of the present invention will be reflected 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

[0023] Figure 1 is a plan view of the mobile platform of the present invention;

[0024] Figure 2 is an elevation view of the mobile platform of the present invention;

[0025] Figure 3 This is a plan view of the bridge deck hoisting at the abutment of the present invention;

[0026] Figure 4 This is a plan view of the crawler crane of the present invention hoisting the bridge deck onto the bridge;

[0027] Figure 5 This is a plan view of the crawler crane of the present invention moving forward to hoist the bridge deck;

[0028] Figure 6 This is an elevation view of the crawler crane of the present invention moving forward to hoist the bridge deck;

[0029] Figure 7 This is a plan view of the crawler crane's cyclic operation according to the present invention.

[0030] Description of reference numerals:

[0031] 1. Crawler crane, 2. Flatbed truck, 3. Installed bridge deck, 4. Bridge deck to be erected, 5. Abutment, 6. Mobile platform, 7. Bridge planking, 8. Shear nail notches, 9. Outriggers, 10. Steel beam. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] 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 "horizontal", "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 to the present invention.

[0034] The present invention lays four groups of mobile platforms 6 on the bridge deck. Each group of mobile platforms 6 is supported by four rigid legs 9 and bears the force from the I-beam main steel beam 10 of the bridge pier. The bridge deck does not participate in the force transmission. The lifting equipment travels to the mobile platforms 6 for construction. This ensures that the lifting equipment does not directly contact the bridge deck, avoiding the risk of cracking caused by direct force on the bridge deck. At the same time, it reduces the investment in large lifting equipment, saves construction costs, and speeds up construction efficiency. The lifting equipment is the crawler crane 1 in this application.

[0035] like Figure 1 and Figure 2 As shown, the mobile platforms 6 are arranged in four groups along the longitudinal direction of the bridge. The number of groups of mobile platforms 6 is reasonably set according to the length of the crawler crane 1 itself and the space reserved for the installation and removal of the mobile platforms 6 during the crawler crane 1's forward movement. The mobile platforms 6 are supported on the steel beams 10 of the bridge piers by four legs 9 provided at their four corners. Figure 1 In one embodiment shown, the longitudinal steel beams 10 of the pier, supported on the left central main beam and the right side main beam, are each provided with shear nail notches 7 and central wet joints for temporary fastening to the legs 9. A pair of horizontal braces is installed on the four legs 9 in the transverse direction of the bridge, and then a pair of longitudinal braces is installed on the pair of horizontal braces in the longitudinal direction of the bridge. Then, a slat 8 is provided on the longitudinal braces to support the crawler crane 1 and provide a range of movement for the crawler crane 1. After multiple groups of mobile platforms 6 are sequentially installed in the longitudinal direction of the bridge, they are temporarily rigidly connected to form a whole, and the temporary rigid connection can be made by temporary welding.

[0036] like Figures 3 to 7 As shown, the present invention is based on a mobile platform 6 bridge deck installation process, specifically including the following steps:

[0037] Step 1: Crawler crane 1 lifts the bridge deck at 5 locations on the abutment.

[0038] The crawler crane 1 is located at the abutment 5, lifting the bridge panels at the 5 left and right abutments to ensure that space is reserved for the initial installation of the mobile platform 6.

[0039] Step 2: Lay out four sets of mobile platforms 6, ensuring that the four legs 9 of each set of mobile platforms 6 are placed on the shear nail notches 7 and the steel beams 10 of the central wet joint.

[0040] Before the crawler crane 1 is hoisted on the bridge, the crawler crane 1 walking mobile platform 6 is laid to ensure that the bridge deck and the wet joint steel bars are not touched or damaged when passing through the wet joint. The crawler crane 1 is walking and hoisting, and the installed bridge deck 3 is not stressed. The specific installation method of the mobile platform 6 is: first hoist the four legs 9 to the designated position, and then hoist the transverse braces in the transverse direction of the bridge, the longitudinal braces in the longitudinal direction of the bridge, and the planks 8 set on the longitudinal braces to the legs 9 and perform temporary rigid fixed connections to form an integral mobile platform 6 structure; repeat the above operation three times until the four groups of walking mobile platforms 6 are installed in place, and finally the four groups of planks 8 are temporarily rigidly connected into a whole to ensure the integrity of the force. The mobile platform 6 is always erected on the steel beam 10 corresponding to the installed bridge deck 3.

[0041] Step 3: The crawler crane 1 moves to the mobile platform 6 to lift the bridge deck.

[0042] In accordance with the established technical requirements, the crawler crane 1 moves to the pre-paved mobile platform 6 on the left side of the bridge and installs the bridge decks within the crane's lifting range. The flatbed truck 2 transports the bridge deck 4 to the crawler crane's lifting position, where it is directly lifted and installed. The crawler crane's lifting range on the mobile platform 6 covers the entire transverse direction of the bridge, and the size of the mobile platform 6 is appropriately set according to the actual construction environment.

[0043] Step 4: The mobile platform 6 moves to form a walking platform for the crawler crane 1.

[0044] When the crawler crane 1 completes the work of lifting the bridge panel at the current position, the crawler crane 1 moves to the mobile platform 6 at the front of the bridge panel laying, and lifts the extra mobile platforms 6 behind the bridge panel laying to the forward direction, forming a walking platform for the crawler crane 1, and always keeps the crawler crane 1 walking and working on the mobile platform 6.

[0045] Step 5: Repeat the above steps until all bridge decks are installed.

[0046] Crawler crane 1 and flatbed truck 2 continue to move forward; crawler crane 1 lifts the bridge deck within the lifting range again to complete the installation of the left span bridge deck; crawler crane 1 and flatbed truck 2 continue to move forward until all bridge decks are installed.

[0047] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. 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 illustrations shown and described herein.

Claims

1. A bridge deck installation process based on a mobile platform, characterized in that: The steps include: Step 1: Install the bridge deck at the abutment using a crawler crane under the bridge; Step 2: Install a mobile platform on the steel beam of the pier according to design requirements. The platform is capable of moving along the longitudinal direction of the bridge. The lifting range of the crawler crane on the mobile platform covers the entire transverse direction of the bridge. The mobile platform is supported on the steel beam of the pier by four legs. The four legs are longitudinally provided with transverse braces in the transverse direction of the bridge, longitudinal braces in the longitudinal direction of the bridge, and slats on the longitudinal braces. These are used to support the crawler crane and provide a range of movement for the crawler crane. The legs are detachably connected to the steel beam of the pier. The legs are placed on the steel beam at the shear stud notches and the central wet joint. Step 3: The crawler crane moves to the mobile platform and installs the bridge deck of the corresponding range within its lifting range; Step 4: After the crawler crane completes the bridge deck installation work at the current location, the mobile platform is moved longitudinally to the next location, and the crawler crane is used to continue the bridge deck installation work at the next location; Step 5. Repeat steps 3 and 4 above until all bridge panels are installed.

2. The bridge deck installation process based on a movable platform according to claim 1, characterized in that: There are multiple groups of mobile platforms, which are arranged in sequence along the longitudinal direction of the bridge and temporarily rigidly fixed to each other as a whole. The crawler crane sequentially lifts the group of mobile platforms at the rear of the bridge deck laying to the front of the bridge deck laying, and the mobile platforms are directly moved in the longitudinal direction of the bridge through the crawler crane.

3. The bridge deck installation process based on a movable platform according to claim 1, characterized in that: The specific method of installing the mobile platform in step 2 is: first, hoist the four legs to the set position, and then hoist and install the horizontal braces in the transverse direction of the bridge, the longitudinal braces in the longitudinal direction of the bridge, and the planks set on the longitudinal braces to the legs and perform temporary rigid fixed connections to form an integral mobile platform structure.

4. The mobile platform-based bridge deck installation process according to claim 3, characterized in that: When moving the mobile platform longitudinally, release the connection between the mobile platform's legs and the steel beams of the pier, and then use the crawler crane to lift the mobile platform as a whole to the forward direction of the bridge deck laying. According to the design requirements, lift all the redundant mobile platforms behind the bridge deck laying to the front of the laying, and then temporarily rigidly fix the multiple groups of mobile platforms into a whole.

5. The mobile platform-based bridge deck installation process according to claim 2, characterized in that: The movable platforms are arranged in four groups.

6. The bridge deck installation process based on a movable platform according to claim 1, characterized in that: The bridge deck to be erected is moved under the bridge by a flatbed truck to just below the lifting position of the crawler crane, and the bridge deck is directly lifted and installed by the crawler crane.

7. The mobile platform-based bridge deck installation process according to claim 1, characterized in that: The mobile platform is always mounted on the steel beam corresponding to the installed bridge deck.

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