Underwater bridge submarine type emergency supporting equipment and erecting method thereof

Abstract

The invention discloses submarine emergency supporting equipment for a bridge in water and an erecting method thereof, and the equipment comprises a submarine buoyancy tank, a supporting upright post system arranged on the submarine buoyancy tank, a submerging control system for controlling the water quantity in the submarine buoyancy tank, and a positioning system for positioning the submarine buoyancy tank, the supporting stand column system is of a telescopic structure and is fixed to the submarine type buoyancy tank, the submerging and surfacing control system is arranged on the supporting stand column system and controls water pumping and water suction to control the water amount in the submarine type buoyancy tank, and the positioning system is used for fixing and positioning the position of the submarine type buoyancy tank. The bridge is contacted and supported through the supporting stand column system. According to the equipment, temporary support for bridge emergency rescue and dismantling can be rapidly formed in a short time, vertical supporting force is controlled by controlling the water amount in the buoyancy tank, influences of rising tide, falling tide and waves are avoided, and bridge structure damage caused by too large or too small supporting force is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of water bridge construction, and more specifically, to a submerged emergency support device for a water bridge and a method for erecting the same. Background Art

[0002] As the load of traffic vehicles increases, the bearing capacity and durability of bridges decrease. Emergency rescue and demolition of old and dangerous bridges will be inevitable large-scale construction work in the future. During the emergency rescue and demolition of bridges, the most critical issue is to set up temporary supports to provide vertical support for the bridges. However, for cross-river and cross-sea bridges, the establishment of temporary supports is complex and uncontrollable. At present, the most widely applicable temporary support erection method is to set up steel pipe piles under the bridge, and then set up temporary supports on the steel pipe piles. This method has a large workload and a long operation time, and has a greater impact on the bridge waterway with navigation needs. In this regard, it is urgent to optimize the temporary support erection method during the emergency rescue and demolition of bridges.

[0003] Patent CN115247401A discloses a support and removal device for a steel structure of a floating pontoon bridge on water and a support and removal method thereof, which includes a bridge body, a working platform, a connecting plate, a lattice column, an I-shaped steel and an injection and drainage device. A plurality of pontoons are assembled as a working platform, and a plurality of lattice columns and I-shaped steels are arranged on the working platform with heights gradually increasing from both sides to the middle. The bridge body is reinforced as a supporting structure, and a hydraulic diamond wire saw is used to cut the prestressed bridge, thereby ensuring the unobstructed river channel. The device is suitable for the removal of bridges on rivers that cannot be cut off, saving dredging costs. At the same time, the overall structure is reliable, reducing safety risks, the construction site is clean and tidy, and the environmental pollution is small. The removal and cutting construction operations are standardized, shortening the construction period and saving construction costs. This invention provides a support structure for bridge dismantling, but it needs to be prefabricated in advance according to the form of the bridge, has narrow applicability, and has a low material recycling rate. At the same time, its fixing method is that the supports on both sides are fixed on the bridge piers, and the entire length of the bridge needs to be supported for stability, which has a great impact on navigation. In addition, its restraining force is perpendicular to the water level, which makes the pontoon support less stable under the action of wind and waves, and cannot be used for cross-river, cross-river and cross-sea bridges. This invention example uses I-beams on the upper part, the supporting force cannot be predicted and the force is easily concentrated, resulting in damage to the beam body. Summary of the invention

[0004] One purpose of the present invention is to provide a submerged emergency support device for an underwater bridge and a method for erecting the device, so as to solve the problems of inconvenience in working in water and operability of temporary support. The device can quickly form temporary support for emergency rescue and demolition of the bridge in a short time, and the vertical support force can be controlled by controlling the amount of water inside the pontoon. The device is not affected by high tide, low tide and waves, and damage to the bridge structure caused by excessive or insufficient support force can be avoided.

[0005] In order to solve the above technical problems, the present invention provides a submerged emergency support device for an underwater bridge, comprising a submerged pontoon, a support column system arranged on the submerged pontoon, a submerged control system for controlling the amount of water in the submerged pontoon, and a positioning system for positioning the submerged pontoon, wherein the support column system is arranged as a telescopic structure and is fixed on the submerged pontoon, the submerged control system is arranged on the support column system and controls the amount of water in the submerged pontoon by controlling water pumping, and the positioning system is used to fix the position of the submerged pontoon and contact and support the bridge through the support column system.

[0006] Preferably, the submerged pontoon includes a plurality of pontoon units combined and connected to form a whole, the pontoon units are connected by standard connecting rings, and after the connection, only the relative displacement and the rotation perpendicular to the plane are fixed, and the rotation within the plane is not restricted. The pontoon unit includes an overall frame structure and an internal pontoon support frame arranged inside and connected to the overall frame structure as a whole, the overall frame structure is sealed by a waterproof outer wall to form the pontoon unit into a sealed box structure; the pontoon unit is provided with a plurality of standard sizes to form a plurality of standard pontoon units of different sizes, which are used to adapt to bridge supports of different sizes.

[0007] Preferably, a pair of standard parts connecting rings are arranged between any two connected pontoon units, and the standard parts connecting rings include a connecting rod, a sleeve rod arranged on the connecting rod, a sleeve ring and a fixing rod. A vertical slide groove is arranged on the side wall of the pontoon unit, one end of the connecting rod is slidably connected to the slide groove of one of the pontoon units, and the other end is formed into a U-shaped structure with an opening facing the other pontoon unit. The sleeve rod is vertically fixedly connected to the opening of the U-shaped structure, and the sleeve ring is freely sleeved on the sleeve rod. One end of the fixing rod is rotatably connected to the sleeve ring to only realize in-plane rotation, and the other end is fixedly connected to the other pontoon unit; a pair of standard parts connecting rings are vertically spaced or horizontally spaced and symmetrically arranged between the pontoon units, a pair of standard parts connecting rings are centrally symmetrically arranged along their symmetrical center points, and the sleeve rods and sleeve rings corresponding to the pair of standard parts connecting rings are exactly corresponding to each other up and down or left and right.

[0008] Preferably, the supporting column system includes a hollow waterproof steel outer wall and a steel bracket and a hydraulic telescopic system arranged in the waterproof steel outer wall. The hydraulic telescopic system is fixed to a stable base arranged at the bottom of the inner part of the waterproof steel outer wall. A bracket is arranged on the top of the hydraulic telescopic system, and the steel bracket is fixedly connected to the bracket. A plurality of vertical slide rails are also evenly spaced inside the waterproof steel outer wall. The steel bracket fits the vertical sliding arrangement in the vertical slide rail, and the top of the steel bracket is used to support the bridge.

[0009] Preferably, a jack leveling system and a force and displacement sensor are provided on the top of the steel support, the jack leveling system is used to adjust the vertical contact between the steel support and the bottom surface of the bridge, and the force and displacement sensor is used to obtain the displacement of the steel support and the vertical supporting force of the steel support on the bridge.

[0010] Preferably, a plurality of the support column systems are evenly and symmetrically arranged on the submerged pontoon, a connecting port is provided between the support column system and the submerged pontoon, the submerged pontoon control system comprises a water outlet pipe and a water pumping system, the water outlet pipe is connected to the water pumping system and the connecting port, the water in the submerged pontoon is discharged through the water pumping system or the water under the bridge is sucked into the submerged pontoon to achieve the floating and diving of the submerged pontoon, and also comprises a PLC control system, which controls the actions of the jack leveling system and the water pumping system respectively, the PLC control system also obtains data from the force and displacement sensors to obtain the vertical supporting force and displacement of the steel support, and the PLC control system also controls the action of the hydraulic telescopic system.

[0011] Preferably, the positioning system includes a traction rope or a support rod, the traction rope is pulled by a weight or actually pulled on site, and the support rod realizes rigid support; or the positioning system includes a traction rope and a support rod, which are respectively arranged upstream and downstream of the water flow.

[0012] The present invention also provides a method for erecting a submerged emergency support device for an underwater bridge, which specifically includes the following steps when performing emergency repairs on the bridge: Step 1: Assemble the submerged pontoon and supporting column system on the ground according to the area of ​​the bridge to be supported; Step 2: After the assembly is completed, the whole is lowered into the water. At this time, there is no water in the submerged pontoon, and the submerged pontoon is towed to the set support position; Step 3: Drive the steel support to rise until it contacts the bridge deck and then slowly rises. During this process, the submerged pontoon is filled with water until the vertical support force reaches the design value. Then, the water pumping system is simultaneously turned on to inject water into the submerged pontoon until the submerged pontoon is completely submerged in water. Then, the water injection is stopped. After that, the steel support continues to rise until the submerged pontoon dives to a suitable depth, and then the lifting is stopped. Step 4: Set up the positioning system; Step 5. After the emergency support equipment is set up, the vertical support force is monitored through displacement and force sensors to ensure that the vertical support force and displacement change within a limited range to maintain the stability of the entire structure.

[0013] Preferably, when the bridge needs to be dismantled, the step 4 further includes cutting the beam into sections, removing the positioning system after the sections are divided and providing lateral constraints through the traction device, then lowering the support of the supporting column system and draining the submerged pontoon at the same time, until the supporting column system is lowered to the bottom and the water in the submerged pontoon is drained, and finally the beam segment is towed to the set position by the traction device and lowered, and after the lowering is completed, the submerged pontoon is towed to the next section of the bridge for recycling. Specifically, when the bridge is dismantled, two sets of identical standard emergency support equipment are prepared, and when the supporting column system starts to be lifted, the two sets of standard emergency support equipment are supported under the adjacent first beam and the second beam at the same time, after the support is completed, the first beam is cut, and then the submerged pontoon corresponding to the first beam is drained and towed and lowered, and the second beam continues to support, and after the first beam is lowered, the standard emergency support equipment at the corresponding position of the first beam is towed to the third beam adjacent to the second beam and provide supporting force, and then the second beam is cut, and so on, and the process is repeated for dismantling and transportation.

[0014] Preferably, the vertical support force in step 5 is , where ρ is the density of water, g is the local gravity coefficient, S is the cavity area of ​​the pontoon, H is the cavity height of the pontoon, h is the water injection depth in the pontoon, and T is the total gravity of the latent emergency support equipment; the error range of the vertical support force is set in the PLC control system as the design range of the vertical support force. If the vertical support force exceeds this design range as monitored by the displacement and force sensor, the pump system is started through the PLC control system to adjust the size of the vertical support force; at the same time, the displacement design range of the steel support is set in the PLC control system. If the displacement exceeds this design range, the hydraulic telescopic system is controlled through the PLC control system.

[0015] The present invention has at least the following beneficial effects: (1) The advantages of the present invention are mainly reflected in the process of bridge emergency rescue and bridge demolition construction.

[0016] ① The present invention can quickly build temporary supports for water bridges and provide timely vertical support for the bridges.

[0017] ② The present invention provides supporting force through a submerged pontoon and a supporting column system. The supporting structure is located underwater, which can effectively reduce the impact of high tide, low tide, wind and waves, making the supporting force more stable, and can effectively avoid damage to emergency bridge repairs caused by unstable supporting force. When the bridge is dismantled by using a submerged pontoon, the submerged pontoon is less affected by wave force in the water, and the dismantling process is safer and more reliable.

[0018] ③ While providing vertical supporting force, the present invention can monitor the supporting force and beam deflection in real time, and can synchronously adjust the amount of water in the pontoon to further ensure the stability of the beam structure.

[0019] ④ The device of the present invention can be assembled, is simple to install, flexible to use, and has a wide range of applicability. It can be perfectly applied to a certain section of a certain span or a whole collapse or even a whole bridge without affecting navigation.

[0020] ⑤ The present invention can undertake a series of tasks such as supporting, lowering, and transporting, and can be recycled and operated in an assembly line to improve construction efficiency.

[0021] (2) The equipment of the present invention belongs to the technical field of reinforcement technology and construction tools, and is applicable to temporary support construction projects of various water buildings such as bridges and docks, and is not limited by structure and load form.

[0022] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side schematic diagram of the bridge's latent emergency support equipment.

[0024] Figure 2 It is a schematic elevation diagram of the bridge's latent emergency support equipment.

[0025] Figure 3 It is a schematic diagram of the support under the beam of the present invention.

[0026] Figure 4 It is a top view of the bridge's latent emergency support equipment.

[0027] Figure 5 It is a top view of the supporting columns of the bridge's latent emergency support equipment.

[0028] Figure 6 It is a cross-sectional view of the supporting columns of the bridge's latent emergency support equipment.

[0029] Figure 7 It is a structural schematic diagram of the standard part connecting ring of the present invention.

[0030] Figure 8 It is a schematic diagram of the PLC control system.

[0031] In the figure: 1—submerged pontoon, 101—inner support frame of pontoon, 102—standard connecting ring, 103—connecting rod, 104—sleeve rod, 105—sleeve ring, 106—fixing rod, 107—slide, 2—support column system, 201—steel bracket, 202—waterproof steel outer wall, 203—jack leveling system and force and displacement sensor, 204—vertical slide rail, 205—bracket, 206—hydraulic telescopic system, 207—stable base, 3—positioning system, 301—traction weight, 302—traction rope, 4—submerged buoyancy control system, 401—water pumping system, 402—water outlet pipe, 403—connecting guide port, 5—water level line, 6—beam body, 7—ground line. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according 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 "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] like Figures 1 to 7 As shown, the present invention provides a submerged emergency support device for an underwater bridge, comprising a connectable submerged pontoon 1, a liftable support column system 2 arranged on the submerged pontoon 1, a submerged control system 4 for controlling the amount of water in the submerged pontoon 1, and a positioning system 3 for positioning the submerged pontoon 1, wherein the support column system 2 is arranged as a telescopic structure and is fixed on the submerged pontoon 1, the submerged control system 4 is arranged on the support column system 2 and controls the amount of water in the submerged pontoon 1 by controlling water pumping, and the positioning system 3 is used to fix the position of the submerged pontoon 1, and contact and support the bridge through the support column system 2.

[0035] Among them, the submerged pontoon 1 includes a plurality of pontoon units combined and connected to form a whole, the pontoon units are connected by a standard connecting ring 102, and after the connection, only the relative displacement and the rotation perpendicular to the plane are fixed, and the rotation within the plane is not restricted. The pontoon unit includes an overall frame structure and an internal pontoon support frame 101 arranged inside and connected to the overall frame structure as a whole, and the overall frame structure is sealed and covered by a waterproof outer wall so that the pontoon unit forms a sealed box structure.

[0036] The submerged pontoon 1 includes an integral frame structure, a waterproof outer wall, an internal support frame 101 of the pontoon, a water hole, i.e., a water inlet hole connected to the connecting guide port 403, and other components. This design can maximize the reduction of its own weight while ensuring that the pontoon has a strong anti-deformation ability. The size of a single pontoon unit should specify a standard value, which is divided into three types: large, medium, and small, respectively suitable for large, medium, and small bridges. Among them, the pontoon units can be connected to form a whole, suitable for splicing in various situations, and connected by a standard connection ring 102, which only fixes the relative displacement and the rotation perpendicular to the plane, and does not limit the rotation within the plane, so as to prevent the connection from being broken due to the action of wave force.

[0037] A pair of standard parts connecting rings are arranged between any two connected pontoon units, and the standard parts connecting rings include a connecting rod 103, a sleeve rod 104 arranged on the connecting rod, a sleeve ring 105 and a fixed rod 106. A vertical slide groove 107 is arranged on the side wall of the pontoon unit. One end of the connecting rod is slidably connected to the slide groove of one of the pontoon units, and the other end is formed into a U-shaped structure with an opening facing the other pontoon unit. The sleeve rod is vertically fixedly connected to the opening of the U-shaped structure, and the sleeve ring is freely sleeved on the sleeve rod. One end of the fixed rod is rotatably connected to the sleeve ring to only realize in-plane rotation, and the other end is fixedly connected to the other pontoon unit; a pair of standard parts connecting rings are vertically spaced or horizontally spaced and symmetrically arranged between the pontoon units, a pair of standard parts connecting rings are centrally symmetrically arranged along their symmetrical center points, and the sleeve rods and sleeve rings corresponding to the pair of standard parts connecting rings are exactly corresponding to each other up and down or left and right.

[0038] In the initial state, the connecting rods of the two pontoon units are located in the middle of the slide groove, and the collar is also located in the middle of the sleeve rod. The sleeve rods and the sleeve ring rotation connection points corresponding to the two standard connecting rings are aligned up and down or left and right to achieve synchronous rotation when the pontoon unit is tilted. The rotation connection method is, for example, a pin rotation connection. The inner diameter of the collar is slightly larger than the outer diameter of the sleeve rod, and it can move freely up and down on the sleeve rod to achieve vertical relative displacement to meet the changes in wave fluctuations. The structures of a pair of standard connecting rings are exactly the same, but they are centrally symmetrically arranged between the two pontoon units. When the pontoon unit on the right floats up, down, or tilts, the rotating connection between the collar and the fixed rod is used to achieve coordinated tilting and rotation, and the vertical displacement change is achieved through the relative displacement of the slide groove and the collar and rod. The setting of the two standard connecting rings can achieve a stable matching connection and better adapt to water construction.

[0039] Among them, the supporting column system 2 includes a hollow waterproof steel outer wall 202 and a steel support 201 and a hydraulic telescopic system 206 arranged in the waterproof steel outer wall 202. The hydraulic telescopic system 206 is fixed to a stable base 207 arranged at the bottom of the waterproof steel outer wall 202. A bracket 205 is arranged on the top of the hydraulic telescopic system 206, and the steel support 201 is fixedly connected to it. A plurality of vertical slide rails 204 are also evenly spaced inside the waterproof steel outer wall 202. The steel support 201 just fits in the vertical sliding setting inside the vertical slide rail 204. The top of the steel support 201 is used to support the bridge.

[0040] The support column system 2 includes an external sealed enclosure forming a waterproof steel outer wall 202 of the column, an internal truss-type steel support 201, and a hydraulic telescopic system 206. The support column system 2 is placed above the submerged pontoon 1, and the two are bolted and fixed while ensuring the sealing of the pontoon. The support column system 2 serves as a connecting medium between the bridge beam 6 and the pontoon. It is constructed as a waterproof steel outer wall 202 and a steel support 201 composed of an internal extendable truss. There is an inlet and outlet water communication port 403 between the pontoon and the support column system 2, which is communicated with the steel waterproof outer wall on the outside and connected to a pumping system 401, such as a water suction device, through a water outlet pipe 402, so as to achieve internal water supply and drainage control of the pontoon; a lateral vertical slide rail 204 and a bottom hydraulic telescopic system 206 are provided between the internal steel support 201 and the steel waterproof outer wall, so as to adjust the vertical movement of the internal steel support 201 to meet the temporary support use of high-span bridges.

[0041] Among them, a jack leveling system and a force and displacement sensor 203 are arranged on the top of the steel support 201. The jack leveling system is used to adjust the vertical contact between the steel support 201 and the bottom surface of the bridge, and the force and displacement sensor is used to obtain the displacement of the steel support 201 and the vertical supporting force of the steel support 201 on the bridge.

[0042] The support column system 2 is also equipped with a jack leveling system and a force and displacement monitoring system, i.e., a force and displacement sensor, located on the top of the steel support 201, which monitors and adjusts (within the design limit) the support force of the temporary support structure on the beam body 6. The above monitoring systems are all connected to the PCL control system to visually control the temporary support.

[0043] The jack leveling system has two main functions. The first is that when the pontoon is submerged in the water and towed to the specified position, the water in the pontoon is partially pumped out, the pontoon rises and the steel support 201 contacts the bottom of the beam. At this time, there is a situation due to process or water level that the column and the bottom of the beam may not be in vertical contact. At this time, the jack leveling system is used for leveling to make the steel support 201 perpendicular to the bottom of the beam to ensure that the contact area is sufficient. If it is controlled by the pontoon drainage, there is a great possibility that the steel support 201 provides support force obliquely, and the contact area is too small to damage the concrete at the bottom of the beam; the second is to fine-tune the force. When the pontoon is not completely submerged in the water, whether it is through the telescopic steel support 201 or the upper and lower pontoons, the support force is controlled by displacement. The error is too large, and it is difficult to provide support force within the theoretical value range. Therefore, the jack leveling system is used to ensure that the support force is within a controllable range and reduce secondary damage to the bridge structure.

[0044] Among them, the supporting column system 2 is evenly and symmetrically arranged in multiple numbers on the submerged pontoon 1, and a connecting port 403 is arranged between the supporting column system 2 and the submerged pontoon 1. The submerged pontoon control system 4 includes a water outlet pipe 402 and a water pumping system 401. The water outlet pipe 402 is connected to the water pumping system 401 and the connecting port 403. The water in the submerged pontoon 1 is discharged or the water under the bridge is sucked into the submerged pontoon 1 through the water pumping system 401 to realize the floating and diving of the submerged pontoon 1.

[0045] The submersible and buoyant control system 4 includes a water pumping system 401, such as a three-way water supply and drainage pump, and a water outlet pipe 402, which realizes the floating and diving of the pontoon through water intake and drainage, thereby adjusting the vertical supporting force of the bridge.

[0046] Wherein, the positioning system 3 includes a traction rope 302 or a support rod, the traction rope 302 is pulled by a heavy object or actually pulled on site, and the support rod realizes rigid support; or the positioning system 3 includes a traction rope 302 and a support rod, which are respectively arranged upstream and downstream of the water flow.

[0047] The positioning system 3 includes a traction rope 302 or a support rod for traction of a weight 301. The positioning system 3 is a system that prevents its position from changing, and can be tractioned by a weight or by actual traction on site. The positioning system 3 described in the embodiment of the present application is formed by connecting a traction rope 302 (support rod) and a traction weight 301. In order to adapt to the lateral force of the water flow on the pontoon, a traction rope 302 is assembled upstream of the pontoon, and a support rod is assembled downstream to position the pontoon. The traction weight 301 is supported on the ground line 7, and the submerged pontoon 1 is located below the water level line 5.

[0048] It also includes a PLC control system, which controls the actions of the jack leveling system and the water pumping system 401 respectively. The PLC control system also obtains data from force and displacement sensors to obtain the vertical supporting force and displacement of the steel support 201. The PLC control system also controls the actions of the hydraulic telescopic system 206.

[0049] like Figure 8 As shown, the PLC control system is powered by a low-voltage distribution box, and obtains force and displacement sensor data through an input module, and controls the pumping system 401 and the jack leveling system through the output module through the obtained data. The PLC control system is used to connect the jack leveling system on the top of the supporting column, the force and displacement sensor, and the pumping system 401 for water inlet and outlet, that is, the water supply and drainage pump. The low-voltage feedback signal of the water supply and drainage pump and the jack leveling system and the force and displacement sensor signal are input into the PLC input module, and then the signal is processed by the PLC into a visual signal and transferred to the touch screen, and then the instructions are manually input on the touch screen to control the water supply and drainage pump and the jack leveling system through the output module.

[0050] When the emergency support equipment of the present application is used for bridge emergency rescue and bridge demolition construction, one or more latent emergency support equipment may be used to achieve emergency support.

[0051] The present application discloses a method for erecting a submerged emergency support device for an underwater bridge, and the specific implementation steps are: ground assembly → overall lowering → positioning and floating → contraction of the support column system 2 → lifting of the support column system 2 → the lifting force reaches the design value → water enters the pontoon and the support column system 2 is kept lifted continuously (ensuring that the lifting force is within the design value range) → the pontoon is immersed in water → installation of lateral constraints, i.e., positioning system 3.

[0052] Specifically: It includes the following steps: Step 1: assemble the submerged pontoon 1 and the supporting column system 2 on the ground according to the area of ​​the bridge to be supported; Step 2: After the assembly is completed, the whole is lowered into the water. At this time, there is no water in the submerged pontoon 1, and the submerged pontoon 1 is towed to the set support position; Step 3: Drive the steel support 201 to rise until it contacts the bridge deck and then slowly rises. During this process, the submerged pontoon 1 is filled with water until the vertical support force reaches the design value. The water pump system 401 is simultaneously turned on to inject water into the submerged pontoon 1 until the submerged pontoon 1 is completely submerged in water. Then, the water injection is stopped. After that, the steel support 201 continues to rise until the submerged pontoon 1 dives to a suitable depth, and then the lifting is stopped. Step 4, setting the positioning system 3; the step 4 may also include cutting the beam body 6 into sections, removing the positioning system 3 after the sections are divided and providing lateral constraints through the traction device, then lowering the support of the supporting column system 2 and draining the submerged pontoon 1 at the same time, until the supporting column system 2 is lowered to the bottom and the water in the submerged pontoon 1 is drained, and finally the beam body 6 segment is towed to the set position by the traction device and lowered, and after the lowering is completed, the submerged pontoon 1 is towed to the next section of the bridge for recycling.

[0053] Step 5. After the emergency support equipment is set up, the vertical support force is monitored through displacement and force sensors to ensure that the vertical support force and displacement change within a limited range to maintain the stability of the entire structure.

[0054] After the emergency support equipment of the present invention is erected, there will be changes in the vertical supporting force and displacement, because the vertical supporting force is achieved by the buoyancy of the submerged pontoon 1. If the pontoon is completely submerged, theoretically, the vertical supporting force provided by the pontoon is stable, but due to the influence of water flow, water level and waves, the supporting force will change periodically within a small range. Furthermore, for bridges that are severely affected by disasters, the deflection of the bridge itself may continue to increase. Therefore, it is necessary to monitor the force and displacement. If it is outside the allowable range, it is necessary to pump water to increase the supporting force.

[0055] Lurking emergency support equipment provides vertical support When the structure of the submerged emergency support equipment is fixed, the support force is only related to the water filling depth in the pontoon.

[0056] Where ρ is the density of water, g is the local gravity coefficient, S is the area of ​​the pontoon cavity, H is the height of the pontoon cavity, h is the water injection depth in the pontoon, and T is the total gravity of the submerged emergency support equipment. If the vertical support force changes during the support process, it can be adjusted to this fixed value, and the adjustment is made through the PLC control system. The error range of the vertical support force is set in the PLC control system as the design range of the vertical support force. If the vertical support force exceeds this design range as monitored by the displacement and force sensor, the pump system 401 is started through the PLC control system to adjust the size of the vertical support force; at the same time, the displacement design range of the steel support 201 is set in the PLC control system. If the displacement exceeds this design range, the hydraulic telescopic system 206 is controlled by the PLC control system.

[0057] The method of the present invention can be applied to bridge construction processes such as bridge emergency rescue and demolition of dangerous and old bridges. The following takes bridge emergency rescue and bridge superstructure demolition as examples, respectively, and combines the drawings in the present invention to clearly and completely describe the technical scheme of the specific erection implementation method corresponding to the equipment in the present invention.

[0058] Embodiment 1 Take the emergency rescue of a cross-river bridge as an example. The main bridge of the bridge spans the river. Due to force majeure (floods, earthquakes, etc.), its deflection exceeds the limit. The bridge monitoring system issues an alarm. The bridge needs to quickly set up temporary support to ensure the stability of the structural force system. First, it is necessary to determine the number of pontoons to be assembled on the shore according to factors such as the width of the bridge beam 6 and complete the assembly of the submerged pontoon 1 and the support column system 2. After the assembly is completed, the entire component is hoisted into the water (no water is put into the pontoon), and the pontoon is towed to the designated support position by the traction equipment. The support rod is raised until it rises to contact the bridge deck and then slowly rises (water is filled in the pontoon during this process). After it rises to the support force reaching the calculated value, the water injection device is turned on. The two are carried out simultaneously to ensure the stability of the support force. After the pontoons are completely submerged in the water, the water injection is stopped. After that, the support rod continues to rise until the pontoons dive to the appropriate depth and the jacking is stopped. Finally, leveling is performed and lateral constraints are installed. After the temporary support is erected, the support force is monitored through displacement and force sensors to ensure that the lifting force and displacement change within a limited range to maintain the stability of the entire structure.

[0059] Embodiment 2 Taking the demolition of a cross-river bridge as an example, the operation process is similar to that of Example 1, except that after the support is completed, the beam body 6 is cut into sections by a rope saw, and the lateral constraints of the pontoons are removed after the sections are completed, and the lateral constraints are provided by the traction device. Then, the columns are lowered for support and the pontoons are drained at the same time, until the columns are lowered to the bottom and the water in the pontoons is drained. Finally, the beam body 6 sections are towed to the designated unloading point by the traction device and lowered. After the lowering is completed, the pontoons are towed to the next section of the bridge for recycling. The number of pontoon devices can be reasonably arranged according to the construction period and efficiency. Specifically: when dismantling a bridge, prepare two sets of identical standard emergency support equipment. When the supporting column system starts to be lifted, the two sets of standard emergency support equipment will be supported simultaneously under the adjacent first and second beams. After the support is completed, cut the first beam. After that, the submerged pontoon corresponding to the first beam is drained and towed down, and the second beam continues to support. After the first beam is lowered, the standard emergency support equipment at the corresponding position of the first beam is towed to the third beam adjacent to the second beam and provide support force. Then cut the second beam, and so on, for a cyclic dismantling and transportation.

[0060] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation mode, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, other modifications can be easily implemented, so without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A submerged emergency support device for underwater bridges. It is characterized in that It includes a submerged pontoon, a supporting column system arranged on the submerged pontoon, a submerged pontoon control system for controlling the water volume in the submerged pontoon, and a positioning system for positioning the submerged pontoon. The supporting column system is arranged as a telescopic structure and is fixed on the submerged pontoon. The submerged pontoon control system is arranged on the supporting column system and controls the water volume in the submerged pontoon by controlling water pumping. The positioning system is used to fix the position of the submerged pontoon and contact and support the bridge through the supporting column system.

2. The underwater bridge submerged emergency support device according to claim 1, It is characterized in that The submerged pontoon includes a plurality of pontoon units connected in combination to form a whole. The pontoon units are connected by standard connecting rings, and after the connection, only the relative displacement and the rotation perpendicular to the plane are fixed, and the rotation within the plane is not restricted. The pontoon unit includes an overall frame structure and an internal pontoon support frame arranged inside and connected to the overall frame structure as a whole. The overall frame structure is sealed by a waterproof outer wall to form a sealed box structure for the pontoon unit. The pontoon unit is provided with a plurality of standard sizes to form a plurality of standard pontoon units of different sizes, which are used to adapt to bridge supports of different sizes.

3. The underwater bridge submerged emergency support device as claimed in claim 2, It is characterized in that A pair of standard parts connecting rings are arranged between any two connected pontoon units, and the standard parts connecting rings include a connecting rod, a sleeve rod arranged on the connecting rod, a sleeve ring and a fixed rod. A vertical slide groove is arranged on the side wall of the pontoon unit, one end of the connecting rod is slidably connected to the slide groove of one of the pontoon units, and the other end is formed into a U-shaped structure with an opening facing the other pontoon unit. The sleeve rod is vertically fixedly connected to the opening of the U-shaped structure, and the sleeve ring is freely sleeved on the sleeve rod. One end of the fixing rod is rotatably connected to the sleeve ring to only realize in-plane rotation, and the other end is fixedly connected to the other pontoon unit; a pair of standard parts connecting rings are vertically spaced or horizontally spaced and symmetrically arranged between the pontoon units, a pair of standard parts connecting rings are centrally symmetrically arranged along their symmetrical center points, and the sleeve rods and sleeve rings corresponding to the pair of standard parts connecting rings are exactly corresponding to each other up and down or left and right.

4. The submerged emergency support equipment for underwater bridges according to claim 1, It is characterized in that The supporting column system includes a hollow waterproof steel outer wall and a steel bracket and a hydraulic telescopic system arranged in the waterproof steel outer wall. The hydraulic telescopic system is fixed to a stable base arranged at the bottom of the inner part of the waterproof steel outer wall. A bracket is arranged on the top of the hydraulic telescopic system, and the steel bracket is fixedly connected to the bracket. A plurality of vertical slide rails are also evenly spaced inside the waterproof steel outer wall. The steel bracket fits the vertical sliding arrangement in the vertical slide rail, and the top of the steel bracket is used to support the bridge.

5. The submerged emergency support equipment for underwater bridges as claimed in claim 4, It is characterized in that A jack leveling system and a force and displacement sensor are provided on the top of the steel support. The jack leveling system is used to adjust the vertical contact between the steel support and the bottom surface of the bridge. The force and displacement sensor is used to obtain the displacement of the steel support and the vertical supporting force of the steel support on the bridge.

6. The underwater bridge submerged emergency support device according to claim 5, It is characterized in that The supporting column system is evenly and symmetrically arranged in multiple numbers on the submerged pontoon. A connecting port is arranged between the supporting column system and the submerged pontoon. The submerged pontoon control system includes a water outlet pipe and a water pumping system. The water outlet pipe is connected to the water pumping system and the connecting port. The water in the submerged pontoon is discharged or the water under the bridge is sucked into the submerged pontoon through the water pumping system to realize the floating and diving of the submerged pontoon. The system also includes a PLC control system, which controls the actions of the jack leveling system and the water pumping system respectively. The PLC control system also obtains data from the force and displacement sensors to obtain the vertical supporting force and displacement of the steel support. The PLC control system also controls the action of the hydraulic telescopic system.

7. The underwater bridge submerged emergency support device according to claim 1, It is characterized in that The positioning system includes a traction rope or a support rod, the traction rope is pulled by a weight or actually pulled on site, and the support rod realizes rigid support; or the positioning system includes a traction rope and a support rod, which are respectively arranged upstream and downstream of the water flow.

8. A method for erecting a submerged emergency support device for a bridge in water. It is characterized in that When carrying out emergency repairs on bridges, the specific steps include the following: Step 1: Assemble the submerged pontoon and supporting column system on the ground according to the area of ​​the bridge to be supported; Step 2: After the assembly is completed, the whole is lowered into the water. At this time, there is no water in the submerged pontoon, and the submerged pontoon is towed to the set support position; Step 3: Drive the steel support to rise until it contacts the bridge deck and then slowly rises. During this process, the submerged pontoon is filled with water until the vertical support force reaches the design value. Then, the water pumping system is simultaneously turned on to inject water into the submerged pontoon until the submerged pontoon is completely submerged in water. Then, the water injection is stopped. After that, the steel support continues to rise until the submerged pontoon dives to a suitable depth, and then the lifting is stopped. Step 4: Set up the positioning system; Step 5. After the emergency support equipment is set up, the vertical support force is monitored through displacement and force sensors to ensure that the vertical support force and displacement change within a limited range to maintain the stability of the entire structure.

9. The method for erecting the underwater bridge latent emergency support equipment according to claim 8, It is characterized in that When the bridge needs to be dismantled, the step 4 also includes cutting the beam into sections, removing the positioning system after the sections are divided and providing lateral constraints through the traction device, then lowering the support of the supporting column system and draining the submerged pontoon at the same time, until the supporting column system is lowered to the bottom and the water in the submerged pontoon is drained, and finally the beam segment is towed to the set position and lowered by the traction device, and after the lowering is completed, the submerged pontoon is towed to the next section of the bridge for recycling. Specifically, when the bridge is dismantled, two sets of identical standard emergency support equipment are prepared. When the supporting column system starts to be lifted, the two sets of standard emergency support equipment are supported under the adjacent first beam and the second beam at the same time. After the support is completed, the first beam is cut, and then the submerged pontoon corresponding to the first beam is drained and towed and lowered, and the second beam continues to support. After the first beam is lowered, the standard emergency support equipment at the corresponding position of the first beam is towed to the third beam adjacent to the second beam and provide support force, and then the second beam is cut, and so on, and the process is repeated.

10. The method for erecting the underwater bridge latent emergency support equipment according to claim 8, It is characterized in that The vertical support force in step 5 is , where ρ is the density of water, g is the local gravity coefficient, S is the cavity area of ​​the pontoon, H is the cavity height of the pontoon, h is the water injection depth in the pontoon, and T is the total gravity of the latent emergency support equipment; the error range of the vertical support force is set in the PLC control system as the design range of the vertical support force. If the vertical support force exceeds this design range as monitored by the displacement and force sensor, the pump system is started through the PLC control system to adjust the size of the vertical support force; at the same time, the displacement design range of the steel support is set in the PLC control system. If the displacement exceeds this design range, the hydraulic telescopic system is controlled through the PLC control system.

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