Modular floating jacking system

Abstract

This utility model belongs to the field of bridge superstructure demolition construction technology, and discloses a modular floating jacking system, including three modular barges, a jacking mechanism, support modules, and support module connecting braces. Automatically load-and-unloadable support modules are installed above the jacking mechanism; support module connecting braces are arranged longitudinally and transversely between the support modules; a support platform is installed on the top of each support module, and a rubber anti-slip layer is installed at the contact point between the top of the support platform and the beam segment to be demolished. This utility model, by adopting modular barges, a jacking mechanism, and support modules, effectively solves the problem of large equipment being unable to enter the construction area; through the combination of modular barges, a jacking mechanism, support modules, and support platforms, it can meet the demolition operation requirements of different beam segments in terms of weight and height.

Description

Technical Field

[0001] This utility model belongs to the field of bridge superstructure demolition construction technology, specifically relating to a modular floating jacking system. Background Technology

[0002] Due to long-term damage, the load-bearing capacity of the main beam section of the old bridge has been declining after years of operation, failing to meet the requirements for safe operation. It was decided to dismantle the main beam, replace it with a new one, and put it back into use. As a long-span navigation bridge, the bridge site is located in an area with a dense traffic network and busy waterways, and is adjacent to a busy urban area, which places high demands on the efficiency, process, and environmental protection of bridge demolition.

[0003] Currently, the demolition of bridge superstructures primarily utilizes traditional demolition machinery such as floating cranes and bridge deck cranes. The floating crane method employs a single or double floating crane in conjunction to dismantle the bridge superstructure. These floating cranes are equipped with lifting equipment, with fixed and rotating booms, and lifting capacities ranging from hundreds to thousands of tons. Floating cranes generally cannot be self-propelled and require anchor boats for movement and anchoring during practical use. The bridge deck crane method typically uses two bridge deck cranes to divide the bridge superstructure into multiple segments. After dismantling, these segments are lowered into the water to complete the bridge superstructure demolition. This method offers advantages such as high construction efficiency and minimal impact on waterways.

[0004] However, for floating cranes and bridge cranes, if the weight of the bridge superstructure varies greatly, multiple types of equipment with different lifting capacities are required, resulting in poor lifting capacity coverage. Floating cranes are suitable for ultra-large and ultra-heavy bridges. Large cranes are expensive, resources are limited, and large crane vessels may not be able to access inland waterways, making them less adaptable. For bridge cranes, the biggest limiting factor is limited lifting capacity, leading to more segmentation of the bridge beams. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a modular floating jacking system, which includes three modular barges, a jacking mechanism, support modules, and support module connecting braces. The support modules are automatically loaded and unloaded above the jacking mechanism; the support modules are connected longitudinally and transversely. A support platform is installed on the top of the support module, and a rubber anti-slip layer is set at the contact position between the top of the support platform and the beam segment to be dismantled.

[0006] Furthermore, of the three modular barges, the first and second modular barges have the same structure, located on both sides, each equipped with two built-in independent ballast pumps; the third modular barge is located in the middle of the first and second modular barges, and is equipped with two external ballast pumps. The three modular barges are connected and fixed together by six transverse connecting beams. The web of the transverse connecting beams is welded to the deck of the modular barges and is laterally fixed by elbow plates. Counting from the stern to the bow, there are six transverse connecting beams in sequence. The three middle transverse connecting beams are used to connect and fix the modular barges and serve as the base of the lifting mechanism, while the two leftmost transverse connecting beams and the one rightmost transverse connecting beam are only used to fix the modular barges. The lifting mechanism is fixed above the three middle transverse connecting beams, totaling 12 sets.

[0007] Furthermore, a lateral limiting device is installed on the top of the support platform below the inclined web plates on both sides of the beam segment to be dismantled.

[0008] Furthermore, the lateral limiting device is connected to the support platform via a supporting steel section and a lifting jack. A reaction beam is fixed above the supporting steel section and the lifting jack. A reaction seat and a reaction jack are installed at one end of the top of the reaction beam, and a limiting outer box is installed at the other end. A limiting inner box is set inside the limiting outer box. One end of the limiting inner box is connected to the reaction jack, and a rubber pad is set at the other end.

[0009] The beneficial effects of this utility model are: by adopting modular barges, the problem of passage of dismantling equipment in inland waterways is effectively solved, meeting the requirements of different water areas and operations. Furthermore, the number of modular barges can be flexibly adjusted according to the weight of the beam segments to be dismantled. Thus, the weight of the beam segments to be dismantled can be controlled through the loading capacity of the modular barges, resulting in strong adaptability to dismantling operations.

[0010] Thanks to the use of a lifting mechanism and detachable support modules, the problem of not being able to adapt to beam segments of different heights is effectively solved. By controlling the lifting mechanism, the load transfer of the beam segment is completed, and by adjusting the number of support modules, the construction requirements for dismantling and lowering the beam segment are met.

[0011] The use of connecting braces between support modules effectively solves the problem of instability caused by the height of the support modules. By setting connecting braces in the longitudinal and transverse directions of the support modules, the support modules are connected to form a frame structure, and then connected to the modular barge through a lifting mechanism to form a stable connection structure.

[0012] The use of a support platform effectively solved the problem of load distribution for the demolished beam segments. At the same time, limiting devices were installed on both sides of the support platform, along with the rubber anti-slip layer on the top of the support platform, to restrict the lateral displacement of the demolished beam segments on the support platform. Attached Figure Description

[0013] Figure 1 View of modular barge layout Figure 1 ; Figure 2 View of modular barge layout Figure 2 ; Figure 3 View of modular barge layout Figure 3 ; Figure 4 Visual arrangement of the modular floating jacking system Figure 1 ; Figure 5 Visual arrangement of the modular floating jacking system Figure 2 ; Figure 6 Visual arrangement of hydraulic adjustment support device for modular floating jacking system support platform Figure 1 ; Figure 7 Visual arrangement of hydraulic adjustment support device for modular floating jacking system support platform Figure 2 ; Figure 8 Positioning device for modular floating jacking system; Figure 9 Cables are provided for the modular floating jacking system; Figure 10 The modular floating jacking system has been moved forward; Figure 11 For modular floating jacking system for jacking and load transfer; Figure 12 The modular floating jacking system was moved out of its dismantling location; Explanation of reference numerals in the attached drawings: 1. Modular floating jacking system; 101. First modular barge; 102. Second modular barge; 103. Third modular barge; 104. Transverse connecting beam 1; 105. Transverse connecting beam 2; 106. Transverse connecting beam 3; 107. Transverse connecting beam 4; 108. Transverse connecting beam 5; 109. Transverse connecting beam 6; 110. Winch 1; 111. Winch 2; 112. Winch 3; 113. Winch 4; 114. Jacking mechanism; 115. Support module; 116. Support module connecting brace; 117. Support platform; 118. 119. Rubber anti-slip layer; 120. Beam segment to be dismantled; 120. Lateral limiting device; 1201. Supporting steel; 1202. Reaction beam; 1203. Reaction seat; 1204. Reaction jack; 1205. Limiting outer box; 1206. Limiting inner box; 1207. Rubber pad; 1208. Lifting jack; 121. Beam segment cutting line; 122. Mooring bollard; 123. Positioning pile; 124. Beam bottom support; 125. Tugboat-1; 126. Tugboat-2; 127. Tugboat-3; 128. Bow mooring line; 129. Stern mooring line; 130. Tugboat mooring line. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] This utility model provides a modular floating jacking system, which mainly includes a modular barge, an automatic jacking system, a support platform, and a lateral limiting device.

[0016] The modular barge consists of three modular barges, which are fixedly connected by several beams on the deck. The three modular barges are connected and fixed together by six transverse connecting beams. The web of the T-beams is welded to the deck of the modular barges and is laterally fixed by elbow plates. Counting from stern to bow, transverse connecting beams 1, 2, and 6 are only used to fix the modular barges; transverse connecting beams 3 to 5, in addition to connecting and fixing the modular barges, also serve as the base for the lifting mechanism. The transverse connecting beams are made of high-strength steel.

[0017] The automatic jacking system consists of a jacking mechanism, support modules, and support module connecting braces. The jacking mechanism is fixed above the transverse connecting beam and consists of 12 sets. The support modules that can be automatically loaded and unloaded are set above the jacking mechanism. Support module connecting braces are arranged longitudinally and transversely between the support modules.

[0018] A support platform is installed on the top of the support module, and a rubber anti-slip layer is installed at the contact point between the top of the support platform and the dismantled beam segment.

[0019] Lateral limiting devices are installed on the top of the support platform, below the inclined webs on both sides of the beam segment to be dismantled. These devices are connected to the support platform via supporting steel sections and lifting jacks. A reaction beam is fixed above the supporting steel sections and lifting jacks. A reaction seat and a reaction jack are installed at one end of the reaction beam, and a limiting outer box is installed at the other end. An limiting inner box is installed inside the limiting outer box, with one end connected to the reaction jack and the other end fitted with a rubber pad. This device is retrieved during the lifting of the beam segment. When the dismantled beam segment is being floated, the hydraulically adjusted support device is raised, and the top support of the device, under the action of the jacks, presses against the outer side of the inclined webs of the beam segment. Combined with the rubber anti-slip layer on the top of the support platform, this prevents lateral slippage of the dismantled beam segment.

[0020] Positioning piles were driven outside the projection of the beam segment to be demolished. There were four sets of positioning piles in total, with each set designed as a group pile. Mooring piles were driven upstream of the positioning piles, also designed as a group pile.

[0021] A beam bottom support is erected at the bottom of the beam segment to be dismantled. The beam segment to be dismantled is separated from the main beam by static cutting and temporarily placed on the beam bottom support before dismantling.

[0022] The modular barge is equipped with three tugboats as guides and mobile equipment during the floating process.

[0023] 1) Pre-positioning of modular floating jacking system ①The lifting mechanism and support platform have been installed and commissioned on the barge assembly platform; ②The modular floating jacking system is towed to the predetermined position by tugboats under the monitoring and command of the measuring instruments; 2) Modular floating jacking system cable hanging ① The anchored boat attaches the winch cable to the mooring bollard; ② The modular floating jacking system has cross cables at the bow that connect to pre-drilled bow piles and mooring piles; 3) The modular floating jacking system anchor was moved forward to the designated dismantling position. ①The winch attaches the cable to the mooring bollard and tightens it, and the modular floating jacking system moves the anchor forward under the action of the winch; ② During the forward movement, a single tugboat is equipped on each side of the modular floating jacking system to ensure the horizontal angle of the modular floating jacking system during the forward movement process; ③ The modular floating jacking system continues to advance. When the bow reaches the center line of the bridge section, the stern winch pulls the cable to the second set of positioning piles on the side, and the winch operates to drive the modular floating jacking system to continue advancing.

[0024] 4) Load transfer of beam segments to be dismantled ① The modular floating jacking system continues to advance until the bow of the ship is against the bow positioning pile; ② Adjust the ballast of the modular floating jacking system to the preset draft, and operate the jacking mechanism until the top platform is in contact with the bottom of the box girder; ③ Drain the ballast water, and the modular floating jacking system floats up until the load of the beam segment to be dismantled is completely transferred to the modular floating jacking system; ④ The lifting mechanism is used to lift the beam segment to be dismantled until it is completely out of contact with the support, maintaining a sufficient gap.

[0025] 5) The transported beam segment is withdrawn. ① Remove the cable connection of the stern winch, connect the cable of the stern winch to the tugboat, and use the tugboat to pull the modular floating jacking system backward; ② The modular floating jacking system transports the dismantled box girder out of the space under the bridge. With the assistance of tugboats, it is moved to the girder segment dismantling and transfer system for further dismantling of the box girder.

[0026] Example 1: like Figure 1-3 As shown, a modular floating system includes three modular barges, wherein the first modular barge 101 and the second modular barge 102 have the same structure and are located on both sides, each equipped with two built-in independent ballast pumps; the third modular barge 103 is located in the middle of the first modular barge 101 and the second modular barge 102 and is equipped with two external ballast pumps.

[0027] The three modular barges are connected and fixed together by six transverse connecting beams. The web of the transverse connecting beams is welded to the barge deck and laterally fixed by elbow plates. From stern to bow, the transverse connecting beams are 104 to 109. Transverse connecting beams 106 to 108 not only connect and fix the modular barges, but also serve as the base for the lifting mechanism. Transverse connecting beams 104, 105, and 109 are only used to fix the modular barges.

[0028] Example 2: like Figure 4-5 As shown, the automatic lifting system consists of a lifting mechanism 114, a support module 115, and a support module connecting brace 116. The lifting mechanism 114 is fixed above the transverse connecting beams 106-108, and there are 12 sets in total. The support module 115, which can be automatically loaded and unloaded, is set above the lifting mechanism 114. The support module connecting braces 116 are arranged longitudinally and transversely between the support modules 115.

[0029] A support platform 117 is installed on the top of the support module 115, and a rubber anti-slip layer 118 is provided at the contact position between the top of the support platform 117 and the demolished beam segment.

[0030] Example 3: like Figure 6-7 As shown, a modular floating jacking system has a support platform 117, and a lateral limiting device 120 is installed on the top of the support platform 117 below the inclined web plates on both sides of the beam segment 119 to be dismantled.

[0031] The lateral limiting device 120 is connected to the support platform 117 via the support steel 1201 and the lifting jack 1208. A reaction beam 1202 is fixed above the support steel 1201 and the lifting jack 1208. A reaction seat 1203 and a reaction jack 1204 are installed at one end of the top of the reaction beam 1202, and a limiting outer box 1205 is installed at the other end. A limiting inner box 1206 is set inside the limiting outer box 1205. One end of the limiting inner box 1206 is connected to the reaction jack 1204, and a rubber pad 1207 is set at the other end.

[0032] Example 4: Based on Example 3, a construction method for dismantling the main beam of an old bridge using a modular floating jacking system includes the following steps: like Figure 8 As shown, positioning piles 123 are driven outside the projection of the beam segment 119 to be demolished. There are four sets of positioning piles 123, and each set of positioning piles 123 is designed as a group pile. Mooring piles 122 are driven upstream of the positioning piles 123, also designed as a group pile.

[0033] A beam bottom support 124 is erected at the bottom of the beam segment 119 to be dismantled. The beam segment 119 to be dismantled is separated from the main beam by static cutting. Before dismantling, it is temporarily placed above the beam bottom support 124.

[0034] Example 5: Based on Examples 1-4, a construction method for dismantling concrete box girders using a modular floating jacking system includes the following steps: like Figure 9 As shown, the lifting mechanism 114, support module 115, support module connecting support 116 and support platform 117 are installed and debugged on the modular barge. The modular floating lifting system 1 is located outside the beam section 119 to be dismantled and is towed to the predetermined position by tugboats 125 and 126. The anchoring boat attaches the bow winches 111 and 112 cables of the modular floating jacking system 1 to the mooring bollard 122 in a cross-cable manner. The winches 111 and 112 tighten the cable, and the modular floating jacking system 1 moves the anchor forward under the action of the winches 111 and 112; During the forward movement of the anchor winch, a single tugboat 125 and 126 are equipped on each side of the stern of the modular floating jacking system 1 to control the direction of the modular floating jacking system 1 during the forward movement. like Figure 10 As shown, the modular floating jacking system 1 continues to advance. When the bow reaches the centerline of the bridge section, the stern winches 110 and 113 carry cables to the second set of positioning piles on the side. The stern winches 110 and 113 then operate, driving the modular floating jacking system 1 to continue advancing.

[0035] like Figure 11 As shown, the bow winches 111 and 112 and the stern winches 110 and 113 winch the anchor until the bow of the modular floating jacking system 1 is abutted against the bow positioning pile 123; Adjust the ballast of the modular floating jacking system 1 to the preset draft, and operate the jacking mechanism 114 until the support platform 117 is in contact with the bottom of the beam segment 119 to be dismantled; The ballast water of the modular floating jacking system 1 is drained, and the modular floating jacking system 1 floats up until the load of the beam segment 119 to be dismantled is completely transferred to the modular floating jacking system 1. The lifting mechanism 114 lifts the beam segment 119 to be dismantled until it is completely out of contact with the beam bottom support 124, maintaining a sufficient gap.

[0036] like Figure 12 As shown, the cable connections of the stern winches 110 and 113 are removed, and the cables of the stern winches 110 and 113 are connected to the tugboat 127. The tugboat 127 pulls the modular floating jacking system 1 to carry the beam segment 119 to be dismantled out of the space under the bridge and float it to the beam segment dismantling and transfer system 2 for further dismantling of the beam segment 119.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular floating jacking system, characterized in that: The modular floating jacking system includes three modular barges, a jacking mechanism (114), support modules (115), and support module connecting braces (116). The support modules (115) that can be automatically loaded and unloaded are set above the jacking mechanism (114); the support modules (116) are arranged longitudinally and transversely between the support modules (115). A support platform (117) is installed on the top of the support module (115), and a rubber anti-slip layer (118) is set at the contact position between the top of the support platform (117) and the beam segment (119) to be dismantled.

2. The modular floating jacking system according to claim 1, characterized in that: Of the three modular barges, The first modular barge (101) and the second modular barge (102) have the same structure and are located on both sides, each equipped with two built-in independent ballast pumps; the third modular barge (103) is located in the middle of the first modular barge (101) and the second modular barge (102) and is equipped with two external ballast pumps. The three modular barges are connected and fixed together by six transverse connecting beams. The web of the transverse connecting beams is welded to the deck of the modular barges and is laterally fixed by elbow plates. The six transverse connecting beams are arranged sequentially from stern to bow. The three transverse connecting beams in the middle are used to connect and fix the modular barges and serve as the base of the lifting mechanism, while the two transverse connecting beams on the far left and the one transverse connecting beam on the far right are only used to fix the modular barges. The lifting mechanism (114) is fixed above the three transverse connecting beams in the middle, totaling 12 sets.

3. The modular floating jacking system according to claim 1, characterized in that: A lateral limiting device (120) is installed on the top of the support platform (117) below the inclined webs on both sides of the beam segment to be dismantled (119).

4. A modular floating jacking system according to claim 3, characterized in that: The lateral limiting device (120) is connected to the support platform (117) through the support steel (1201) and the lifting jack (1208). A reaction beam (1202) is fixed above the support steel (1201) and the lifting jack (1208). A reaction seat (1203) and a reaction jack (1204) are installed at one end of the top of the reaction beam (1202), and a limiting outer box (1205) is installed at the other end. A limiting inner box (1206) is set inside the limiting outer box (1205). One end of the limiting inner box (1206) is connected to the reaction jack (1204), and a rubber pad (1207) is set at the other end.

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