Jacking platform demolition construction process

Abstract

The application discloses a jacking platform dismantling construction process, which comprises the following steps: step one, selecting appropriate hoist equipment according to the weight of each part of the jacking platform; step two, lifting the jacking platform supporting legs until the jacking platform completely floats, and then stopping the jacking platform near the harbor revetment by a tug and a cable, and anchoring the jacking platform near the harbor revetment by the cable; step three, removing the accessories on the jacking platform; step four, removing the supporting legs of the jacking platform; step five, removing the power cabinet and hydraulic oil pipes of the jacking platform; and step six, removing the float boxes of the jacking platform. The weight of each component of the jacking platform and the hoisting range are calculated in detail, and the hoist equipment is inspected, so that the equipment performance and construction conditions are reliable, the dismantling process is reasonably arranged, and the jacking platform dismantling work is safely and efficiently completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydraulic technology. More particularly, the present application relates to a jacking platform dismantling construction process. BACKGROUND

[0002] 400T and 250T jacking platforms were originally purchased for an Israeli project and used as the main equipment for sinking pile and sheet pile construction. In 2018, they were shipped by bulk carrier to the Panama Amador Cruise Terminal project. Among them, the 400T platform is 30.5 meters long, 18.3 meters wide, and 2.13 meters high; 4 legs, each leg is 34.5 meters long, weighs about 44T; a total of 26 pontoons, the heaviest box is the leg box about 25T; and platform power cabinet, hydraulic oil pipe, guardrail, etc. The 250T platform is 24 meters long, 17 meters wide, and 2.4 meters high; 4 legs, each leg is divided into 3 sections, each section is 12 meters long.

[0003] Because the Panama Amador Cruise Terminal project has completed the construction of the hydraulic part of the terminal, the 250T and 400T jacking platforms (i.e. navigation engineering platform 3 and 5) need to be dismantled and transported on land for maintenance. Therefore, a jacking platform dismantling construction process is urgently needed. SUMMARY

[0004] An object of the present application is to solve at least the above problems and provide at least the advantages to be described later.

[0005] Another object of the present application is to provide a jacking platform dismantling construction process that can safely and efficiently guide the on-site dismantling construction of the jacking platform.

[0006] In order to achieve these objects and other advantages according to the present application, a jacking platform dismantling construction process is provided, comprising:

[0007] Step one, according to the weight of each part of the jacking platform, select appropriate crane equipment;

[0008] Step two, lift the jacking platform legs to completely float the jacking platform, use a tugboat and a cable to pull the jacking platform to the side of the port revetment, and anchor the jacking platform to the side of the port revetment with a cable;

[0009] Step three, with the help of crane equipment, remove the accessories on the jacking platform;

[0010] Step four, with the help of a tugboat and crane equipment, remove the legs of the jacking platform;

[0011] Step five, with the help of crane equipment, remove the power cabinet and hydraulic oil pipe of the jacking platform;

[0012] Step six, with the help of crane equipment, remove the pontoons of the jacking platform.

[0013] Preferably, the method for removing the jacking platform legs comprises:

[0014] Step a, the jacking platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and one of the two legs near the side of the jacking platform close to the harbor revetment is removed;

[0015] Step b, the jacking platform is adjusted in direction by relying on the tugboat, so that the two legs originally away from the shore side are rotated to the shore side, the jacking platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the leg on the same diagonal line as the removed leg in step a is removed;

[0016] Step c, the jacking platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the leg on the same shore side as the removed leg in step b is removed;

[0017] Step d, the jacking platform is adjusted in direction by relying on the tugboat, so that the last leg is rotated to the shore side, the jacking platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the last leg of the jacking platform is removed.

[0018] Preferably, the crane device comprises a first crane device and a second crane device, and the process of removing each leg in steps a-d comprises:

[0019] The first crane device on the revetment is used to hoist the basket and the staff to the vicinity of the leg, so that the staff hooks the hook of the second crane device on the ear of the leg;

[0020] The leg is hoisted upward by using the second crane device, and the inclination of the jacking platform and the display load on the second crane device are paid attention to during the hoisting process of the second crane device, if the display load on the second crane device is far more than the lifting capacity value of the second crane device, the hoisting is stopped, the state of the jacking platform is adjusted to completely float on the sea, and then the hoisting is restarted;

[0021] After the leg starts to rise upward, the leg clamping slot is opened, and the leg is continuously hoisted by using the second crane device until the leg leaves the leg float tank of the jacking platform;

[0022] The hoisting arm of the second crane device is rotated, so that the leg is transferred above the designated position of the revetment, and the hook is slowly lowered to make the leg horizontally placed on the designated position of the revetment.

[0023] Preferably, when the power cabinet and hydraulic oil pipe of the jacking platform are removed, the hydraulic oil is first returned to the power cabinet, and then the hydraulic oil pipe is removed.

[0024] Preferably, the jacking platform is a 400T jacking platform or a 250T jacking platform.

[0025] Preferably, the jacking platform is a 400T jacking platform, and the method for removing the float tank of the jacking platform comprises:

[0026] Step A, removing the reinforcing frame on both sides of the float tank of the jacking platform;

[0027] Step B, removing the connecting plate at both ends of the jacking platform;

[0028] Step C, removing the leg tank of the jacking platform, and the diagonal removal method is adopted, i.e., the leg tank at one corner is removed first, then the leg tank at the opposite corner is removed, and then the same method is adopted to remove the remaining two leg tanks;

[0029] Step D, gradually removing the main float tank of the jacking platform.

[0030] Preferably, the jacking platform is a 250T jacking platform, and the method for removing the float tank of the jacking platform comprises:

[0031] Step 1, removing the leg tank of the jacking platform, and the leg tank at the same side at two corners is removed first, and then the leg tank at the other side at two corners is removed;

[0032] Step 2, gradually removing the main float tank of the jacking platform.

[0033] The present application at least has the following beneficial effects: through detailed calculation of the weight and lifting range of each component of the jacking platform and inspection of the crane equipment, the performance of the equipment and the construction conditions are ensured to be reliable, through reasonable arrangement of the disassembly process, the disassembly of the jacking platform is safely and efficiently completed. When the legs of the jacking platform are removed, the two legs at one corner are removed first, and then the two legs at the other corner are removed, so that the balance of the main body of the platform during the removal process is ensured, when the legs are lifted, the displayed lifting weight of the lifting equipment is closely observed, so that the legs can be prevented from being stuck on the main body of the platform, and the safety of lifting is ensured. When the power cabinet is removed, the hydraulic oil is first returned to the power cabinet, so that the hydraulic oil is prevented from flowing into the sea and polluting the environment, and the green and environmental protection of the construction is ensured.

[0034] Other advantages, objects and features of the present application will be apparent from the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 The schematic diagram of the construction range of the 800T automobile crane on the revetment according to the embodiment of the present application;

[0036] Figure 2 The schematic diagram of the 1# leg removal of the 400T jacking platform according to the embodiment of the present application;

[0037] Figure 3 The schematic diagram of the 3# and 4# leg removal of the 400T jacking platform according to the embodiment of the present application;

[0038] Figure 4 The schematic diagram of the 2# leg removal of the 400T jacking platform according to the embodiment of the present application;

[0039] Figure 5 The schematic diagram of the strengthening frame removal of the 400T jacking platform according to the embodiment of the present application;

[0040] Figure 6 The schematic diagram of the strengthening box removal of the 400T jacking platform according to the embodiment of the present application;

[0041] Figure 7 The schematic diagram of the leg box removal of the 400T jacking platform according to the embodiment of the present application;

[0042] Figure 8 The schematic diagram of the main body float box removal of the 400T jacking platform according to the embodiment of the present application;

[0043] Figure 9 The schematic diagram of the leg box removal of the 250T jacking platform according to the embodiment of the present application;

[0044] Figure 10 The schematic diagram of the main body float box removal of the 250T jacking platform according to the embodiment of the present application. DETAILED DESCRIPTION

[0045] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description and drawings.

[0046] It should be noted that the experimental methods described in the following embodiments are conventional methods, and the reagents and materials are commercially available unless otherwise specified. In the description of the present application, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] 400T and 250T jacking platform were originally purchased from Israel project and used as the main equipment for the construction of pipe pile and sheet pile. In 2018, they were shipped by bulk carrier to Panama Amador Cruise Terminal Project. Among them, the 400T platform is 30.5 meters long, 18.3 meters wide, and 2.13 meters high; 4 legs, each leg is 34.5 meters long, weighs about 44T; a total of 26 pontoons, the heaviest box is about 25T for the leg box; and platform power cabinet, hydraulic oil pipe, guardrail, etc. The 250T platform is 24 meters long, 17 meters wide, and 2.4 meters high; 4 legs, each leg is divided into 3 sections, each section is 12 meters long.

[0048] The main assembly components of the 400T jacking platform are shown in Table 1 below:

[0049] Table 1

[0050]

[0051]

[0052] The main assembly components of the 250T jacking platform are shown in Table 2 below:

[0053] Table 2

[0054]

[0055] Example 1:

[0056] The 400T jacking platform demolition construction process includes:

[0057] Step one, according to the weight of each part of the jacking platform, select the appropriate crane equipment;

[0058] The jacking platform is located at the northwest corner of the Amador Cruise Terminal, close to the tugboat berth and the north revetment, and the surrounding area is relatively spacious without affecting the structure. It is planned to clean and level the north revetment to provide a 20m*40m site for crane positioning and component temporary storage.

[0059] The 800T mobile crane is used to lift and remove the 4 legs of the 400T platform, each leg weighing 44T and measuring 34.5m long. The working state of the 800T mobile crane is 18m long, 14m wide, 35.2m long main arm, 35m long auxiliary arm, 83° main arm elevation, 160T counterweight, and 44m minimum lifting height. The total lifting weight is 46T, considering the 2T lifting rig (49T wire rope + 85T shackle).

[0060] The platform is located at the completed cruise terminal berth, protected by the outer breakwater, and the location has small wind and wave, so there is little movement when the platform floats. The near-shore leg is lifted when the tide is not less than 1m, and the leg lifting amplitude is within 40m to meet the lifting requirements. Figure 1

[0061] The lifting ropes and lifting devices used in the demolition construction are locally purchased, and the nameplates indicate their maximum load capacity. The existing lifting ropes and lifting devices of the project meet the safety requirements, so no special calculation and explanation is provided.

[0062] The 260T crawler crane owned by the project is used to complete the removal of the platform float tank, with the heaviest component being the 400T platform leg tank weighing 25T. The 260T crawler crane is about 10m long and 7.6m wide, with a main arm length of 53m. Considering the most unfavorable case (25T float tank), the lifting rig is considered to be 2T (20T lifting belt 2 + 17T shackle), and the total lifting weight is 27T.

[0063] The demolition is considered when the tide is not less than 1m, and the lifting amplitude is about 24m. According to the parameter table, the 260T crawler crane can lift 35t at 24m, and the load is 77.1% of the rated lifting capacity, meeting the safety requirements. The tank can approach the north revetment as the tide rises.

[0064] The existing two 130T crawler cranes at the terminal are about 10m long and 6.5m wide, with a main arm length of 40m. The 130T is mainly responsible for loading the platform components on site and unloading the temporary terminal components.

[0065] Considering the heaviest platform leg (44T) being lifted, the total weight including the lifting rig is 47T (30T 30m long lifting belt 2 + 25T shackle). According to the crawler crane parameter table, the minimum lifting within 10m amplitude is 56.7T, and the load is 82.8% of the rated lifting capacity, meeting the safety requirements.

[0066] Step two, lift the jacking platform legs to the jacking platform completely floating, and use the tugboat and cable to pull the jacking platform to the port revetment, and anchor the jacking platform to the port revetment with cables;

[0067] ​After the long side of the platform is close to the north side of the revetment (and the side is hung with tires), the platform is tightly anchored on the north revetment by cross cable and 10T hoist.

[0068] Step three, remove the attachments on the jacking platform;

[0069] The attachments here include the railings, mooring bitts, chocks and other sundries installed on the jacking platform. After the railings and other sundries on the jacking platform are removed, the removal of the legs and pontoons on the platform is facilitated.

[0070] Step four, remove the legs of the jacking platform;

[0071] Specifically, the 130T crawler crane small hook is used to hoist the basket and the hook personnel to the top of the leg, and then the 800T automobile hook is hung. After the hooking is completed, the small hook is released to remove the basket. Then the 800T automobile hook starts to lift the large hook until the pile leg rises up. At this time, the inclination of the platform and the lifting weight displayed by the crane are closely monitored. If the lifting weight is far greater than 44T, stop lifting the large hook. Adjust the state of the platform so that the platform is completely horizontal and floats on the sea surface. After the pile leg rises slightly, the leg slot is opened, and the large hook is continued to be lifted until the pile leg leaves the leg pontoon.

[0072] The crane is rotated and the large hook is released to ensure that the large hook is vertical or slightly towards the bottom of the leg. The state of the large hook is maintained, and the crane jib, turntable and hook are slowly operated. Finally, the leg is placed flat on the designated position on the shore.

[0073] In the same order, the diagonal removal is adopted according to the platform installation instructions. After one side is removed, the tugboat and anchor rope are used for traction, and the platform is rotated to the other side close to the north revetment. The removal method is consistent with the above.

[0074] The specific process is as follows:

[0075] Remove leg 1: the platform position is controlled by relying on the cable on the shore side and the tugboat on the sea side. The platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the #1 leg is removed (as shown in Figure 2 ).

[0076] Remove legs 3&4: adjust the direction of the platform by relying on the tugboat so that the #3 and #4 legs are close to the shore side. The platform position is controlled by relying on the cable on the shore side and the tugboat on the sea side. The platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the #3 and #4 legs are removed (as shown in Figure 3 ).

[0077] Remove leg 2: adjust the direction of the platform by relying on the tugboat so that the #2 leg is close to the shore side. The platform position is controlled by relying on the cable on the shore side and the tugboat on the sea side. The platform is moved to the lifting capacity range of the crane by relying on the tugboat and the cable, and the #2 leg is removed (as shown in Figure 4 ).

[0078] After the removal of the legs, it can be known from the structural list that the weight of each box structure is small, and the 260T crawler crane can be used to complete the removal of the power cabinet and the platform box on site.

[0079] Step five, remove the power cabinet and hydraulic oil pipe of the jacking platform;

[0080] Specifically, all hydraulic oil is returned to the power cabinet, and the hydraulic oil pipe is started to be disassembled. Each time the hydraulic oil pipe is disassembled, a plug is needed to plug the oil pipe joint to prevent hydraulic oil from leaking into the sea. After the oil pipe is disassembled, it is packed and packaged, and hoisted to the shore by the 260T crawler crane.

[0081] Step six, remove the float box of the jacking platform.

[0082] Specifically, the method for removing the float box of the jacking platform comprises:

[0083] Step A, as shown in Figure 5 , the reinforcing frame on both sides of the float box of the jacking platform is disassembled. The reinforcing frame bolts are disassembled from the inside to the outside. Each pin bolt needs to be knocked twice. After disassembling one, the next one is disassembled. Pay attention to the position of the four reinforcing frames during disassembly. The female lock and the male lock are connected and placed, and the spring is behind the safety plate.

[0084] Step B, as shown in Figure 6 , the reinforcing box at both ends of the jacking platform is disassembled.

[0085] Step C, as shown in Figure 7 , the leg box of the jacking platform is disassembled. The diagonal disassembly method is adopted when the leg box is disassembled. The leg box at one corner is disassembled first, and then the leg box at the opposite corner is disassembled. Then the same method is used to disassemble the remaining two corners of the leg box.

[0086] Step D, as shown in Figure 8 , the main float box of the jacking platform is disassembled. The main float box here includes box Q and box D in Table 1.

[0087] Example 2

[0088] 250T jacking platform disassembly construction process, steps one to five are basically the same as the 400T jacking platform disassembly construction process. Based on the main float box structure of the 250T jacking platform being different from the 400T, the specific construction process is also slightly different when disassembling the float box of the jacking platform in step six.

[0089] Specifically, the method for removing the float box of the jacking platform comprises:

[0090] Step one, as shown in Figure 9 , the leg box of the jacking platform is disassembled. The leg box at both corners on the same side is disassembled first, and then the leg box at both corners on the other side is disassembled.

[0091] Step two, as shown in Figure 10 The main body of the jacking platform is removed, including box 1, box 2 and box 3 in Table 2.

[0092] In the above embodiment, the weight of each component of the jacking platform and the lifting range are calculated in detail, the crane equipment is inspected, the performance of the equipment and the construction conditions are ensured to be reliable, the disassembly process is reasonably arranged, and the disassembly of the jacking platform is safely and efficiently completed. When the jacking platform legs are removed, two legs on one corner are removed first, and then two legs on the other corner are removed, so that the balance of the platform main body during disassembly is ensured. When the legs are lifted, the lifting weight of the lifting equipment is closely observed, so that the legs can be prevented from being stuck on the platform main body, and the safety of lifting is ensured. When the power cabinet is removed, the hydraulic oil is returned to the power cabinet, so that the hydraulic oil is prevented from flowing into the sea and polluting the environment, and the green environmental protection of the construction is ensured.

[0093] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A jacking platform demolition construction process, characterized by, The application relates to a method for removing a jacking platform. Step one: selecting appropriate hoisting equipment according to the weight of each part of the jacking platform; Step two: lifting the jacking platform legs until the jacking platform completely floats, and then stopping the jacking platform near the harbor revetment by the towing vessel and the cable, and anchoring the jacking platform to the harbor revetment by the cable; Step three: removing the accessories on the jacking platform by the hoisting equipment; Step four: removing the jacking platform legs by the towing vessel and the hoisting equipment; Step five: removing the power cabinet and the hydraulic oil pipe of the jacking platform by the hoisting equipment; Step six: removing the float box of the jacking platform by the hoisting equipment. The method for removing the jacking platform legs comprises the following steps: Step a: controlling the position of the jacking platform on the land side by the cable, controlling the position of the jacking platform on the sea side by the towing vessel, moving the jacking platform to the hoisting range of the hoisting equipment by the towing vessel and the cable, and removing one of the two jacking platform legs near the harbor revetment on one side of the jacking platform; Step b: adjusting the direction of the jacking platform by the towing vessel, rotating the two jacking platform legs far from the land side to the land side, controlling the position of the jacking platform on the land side by the cable, controlling the position of the jacking platform on the sea side by the towing vessel, moving the jacking platform to the hoisting range of the hoisting equipment by the towing vessel and the cable, and removing the jacking platform leg on the same diagonal line as the jacking platform leg removed in step a; Step c: controlling the position of the jacking platform on the land side by the cable, controlling the position of the jacking platform on the sea side by the towing vessel, moving the jacking platform to the hoisting range of the hoisting equipment by the towing vessel and the cable, and removing the jacking platform leg on the same land side as the jacking platform leg removed in step b; Step d: adjusting the direction of the jacking platform by the towing vessel, rotating the last jacking platform leg to the land side, controlling the position of the jacking platform on the land side by the cable, controlling the position of the jacking platform on the sea side by the towing vessel, moving the jacking platform to the hoisting range of the hoisting equipment by the towing vessel and the cable, and removing the last jacking platform leg.

2. The jacking platform demolition construction process of claim 1, wherein, The hoisting equipment comprises first hoisting equipment and second hoisting equipment, and the process of removing each jacking platform leg in steps a-d comprises the following steps: hoisting the basket and the workers to the jacking platform leg by the first hoisting equipment on the revetment, so that the workers hook the hook of the second hoisting equipment to the lifting lug of the jacking platform leg; hoisting the jacking platform leg upward by the second hoisting equipment, and paying attention to the inclination of the jacking platform and the display lifting weight on the second hoisting equipment during the hoisting process of the second hoisting equipment; if the display lifting weight on the second hoisting equipment is far more than the lifting capacity value of the second hoisting equipment, the hoisting is stopped, the state of the jacking platform is adjusted to completely float on the sea, and then the hoisting is restarted; after the jacking platform leg starts to rise upward, the jacking platform leg slot is opened, and the jacking platform leg is continuously hoisted by the second hoisting equipment until the jacking platform leg leaves the float box of the jacking platform; rotating the lifting arm of the second hoisting equipment, so that the jacking platform leg is transferred to above the designated position of the revetment, and the jacking platform leg is slowly lowered to be placed on the designated position of the revetment.

3. The incremental launching process of claim 2, wherein, When the power cabinet and the hydraulic oil pipe of the jacking platform are removed, the hydraulic oil is first completely returned to the power cabinet, and then the hydraulic oil pipe is removed; the plug is used to plug the joint of the hydraulic oil pipe every time the hydraulic oil pipe is removed, so that the hydraulic oil is prevented from leaking to the sea; after the hydraulic oil pipe is completely removed, the hydraulic oil pipe is baled and packaged, and then is hoisted to the land by the first hoisting equipment.

4. The dismantling construction process of the lifting platform as described in claim 2, characterized in that, The jacking platform is a 400T jacking platform or a 250T jacking platform.

5. The incremental launching process of claim 4, wherein, The jacking platform is a 400T jacking platform, and the method for disassembling the float box of the jacking platform comprises the following steps: Step A, disassembling the reinforcing frame on both sides of the float box of the jacking platform; Step B, disassembling the connecting plate at both ends of the jacking platform; Step C, disassembling the leg box body of the jacking platform, when the leg box body is disassembled, the diagonal disassembling mode is adopted, the leg box body at one corner is disassembled first, then the leg box body at the opposite corner is disassembled, and then the same mode is adopted to disassemble the remaining two leg box bodies; Step D, gradually disassembling the main float box of the jacking platform.

6. The incremental launching process of claim 4, wherein, The jacking platform is a 250T jacking platform, and the method for disassembling the float box of the jacking platform comprises the following steps: Step 1, disassembling the leg box body of the jacking platform, when the leg box body is disassembled, the leg box bodies at two corners on the same side are disassembled first, and then the leg box bodies at two corners on the other side are disassembled; Step 2, gradually disassembling the main float box of the jacking platform.

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