Offshore bridge section sliding installation method based on SPMT and jack

Abstract

The invention discloses an offshore bridge section sliding installation method based on an SPMT and a jack, the SPMT and a bridge section are carried by a barge to reach the position between slide way beams extending out of bridge piers, the SPMT is used for jacking and reshipping the bridge section, the bridge section falls on a sliding shoe comprising the jack, and then the bridge section slides to an installation position along the slide way beams to be adjusted and located. The bridge section is transferred to the sliding system from the offshore barge through cooperative operation of the SPMT and the jack hydraulic lifting system, offshore sliding installation of the bridge section is achieved, and the method has the beneficial effects that the method can be suitable for the conditions that the distance between bridge piers is small, obstacles exist in a ship entering path, and floating installation cannot be achieved; the flexible adjustment of the mounting posture of the bridge section and the accurate alignment of the bridge section and the piston shoe of the jack can be realized through the SPMT; by means of the SPMT and the jack hydraulic lifting system, the influence caused by barge shaking due to tide water changes and waves can be reduced, and the bridge section can be conveniently transferred to the fixed sliding system from the marine barge.

Description

Technical Field

[0001] The invention relates to the technical field of offshore bridge section engineering, and in particular to an offshore bridge section sliding installation method based on SPMT and a jack. Background Art

[0002] In recent years, with the widespread application of modular bridge construction, the weight of offshore bridge installation structures has continued to increase, and the lifting capacity of crane ships cannot meet the requirements. Floating installation has become a common process for offshore bridge installation, but floating installation still has limitations. It is not suitable for installation conditions where the gap between piers is small or there are hard obstacles that prevent barges from going deep. In order to solve such problems, a common method is to introduce sliding technology for spanning installation. Push-sliding is also a common installation process in bridge engineering. It is efficient and modularized by gradually pushing the bridge sections to the designated positions. However, the sliding of conventional bridge sections is often carried out along the direction of the bridge itself, which is difficult to adapt to bridges with complex bridge conditions, such as bridges with large changes in lateral and vertical curvature.

[0003] To this end, the present invention proposes to perform interspersed offshore sliding of specific span sections, and add SPMTs and jacks to cope with the complex installation environment and installation risks brought by tidal waves through their displacement capabilities and lifting systems. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems of the above-mentioned offshore bridge section sliding installation method based on SPMT and jack, the present invention is proposed.

[0006] Therefore, the present invention proposes to perform interspersed offshore sliding of specific span bridge sections, and add SPMTs and jacks to cope with the complex installation environment and installation risks brought by tidal waves through their displacement capabilities and lifting systems.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for sliding installation of offshore bridge sections based on SPMT and jacks, comprising the following steps:

[0008] S1: Set the slide beam, slide chute and jack shoe on the pier in advance;

[0009] S2: The barge carrying the bridge section and SPMT arrives before the slideway beam, and the mooring rope is fixed to the surrounding cap by a small boat;

[0010] S3: The cable is tightened to allow the barge to enter between the slide beams, and the SPMT enters under the bridge section to lift it up, transports it to the slide beam, and translates or rotates it to align the lifting position of the bridge section with the jack shoe;

[0011] S4: The barge is ballasted, and the SPMT and the jack hydraulic system are raised and lowered in coordination with the tide waves, so that the bridge section falls onto the jack sliding shoes;

[0012] S5: The SPMT descends further, and the ship's ballasting causes the SPMT to separate from the bridge section and retreat;

[0013] S6: The pusher pushes the bridge section to slide along the slideway beam to the installation position;

[0014] S7: The bridge section is lifted up by the positioning jack, the sliding device and the slideway beam under the bridge section are removed, and the bridge section is further positioned;

[0015] S8: Use a three-way jack to achieve precise position adjustment.

[0016] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, the barge is a deck barge, and the SPMT and the bridge section are temporarily loaded on the deck during sea transportation.

[0017] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, the SPMT is a self-propelled hydraulic module flatbed truck with a length of 1.4m per axis, a width of 2.43m per column, and a lifting height range of 1.2m-1.8m; the SPMT has a higher carrying capacity per unit area than other transportation tools, and is suitable for transporting goods with large concentrated loads, and the platform vehicle has a carrying capacity of up to 40t per axle; the SPMT can also be modularly designed, and can be arbitrarily shared according to the characteristics of the goods, with a high equipment utilization rate; the SPMT has many steering modes, is maneuverable and flexible, has good passability, can be translated, can be turned 360° on the spot, can travel diagonally, has a stable and reliable driving and walking, and adopts a closed static hydraulic drive system consisting of a variable pump and a variable motor The system can realize stepless speed regulation and run smoothly and reliably. The SPMT also has synchronous operation. No matter how many axes or PPUs there are, they are all controlled by a remote controller after being connected by signal lines. The SPMT hydraulic cylinder is connected to the hydraulic grouping. The pressure of the oil hydraulic cylinder is the same as that of the hydraulic grouping. Therefore, even if a certain axis is raised or lowered, its hydraulic pressure will still be the same as the pressure in the hydraulic grouping. This enables the SPMT to travel easily on undulating roads without local pressure loss or failure. For example, when encountering uneven roads, some axis systems will lose pressure or increase pressure. At this time, the hydraulic cylinder installed inside the axis can self-adjust by raising or lowering to keep the lower plane of the cargo level. This means that the SPMT can be transported smoothly on barges with uneven decks, which is very suitable for offshore installation.

[0018] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, wherein: the slideway beam in S1 needs to be divided into multiple sections so that the slideway beam can be extracted after the bridge section slides into place in step S7, and the slideway beam should be fixed to the pier or the abutment, and a block or a card plate needs to be provided on the slideway beam to prevent the slideway from shifting during the transfer of the bridge section to the sliding system;

[0019] In step S1, the non-top side of the jack needs to be welded and fixed to the sliding shoe plate, and rubber is added to the top side to increase friction.

[0020] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, wherein: in the step S3, the barge is loaded in advance to pressurize the bow tank and empty the stern tank, ensuring that when the SPMT carries the bridge section to the stern, the weight is used to flatten the raised stern, keeping the barge as a whole in a flat state.

[0021] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jack described in the present invention, wherein: in the step S4, if the length of the slideway beam is not enough to ensure that all bridge sections are transferred to the sliding system, an auxiliary SPMT can be added for temporary support, and the main SPMT first places part of the bridge section on the jack sliding shoe, and the auxiliary SPMT temporarily lifts it up, and the main SPMT retreats and lifts up the bridge section again, and the main SPMT pushes the bridge section deeper into the slideway beam until the bridge section is transferred to the sliding system as a whole;

[0022] In step S4, it is required to pay attention to the wave amplitude at all times. If a large turbulence occurs, the height of the SPMT should be raised to avoid collision between the bridge section and the jack shoe. The process of transferring the bridge section to the sliding system should start from the inner shoe. At this time, the barge stern compartment begins to be ballasted and the SPMT car plate is lowered to make the bottom surface of the bridge section contact the upper surface of the shoe jack. The SPMT built-in hydraulic gauge is observed to ensure the weight transfer of the bridge section. Then, the SPMT position is fine-tuned to align the bridge section with the outer jack shoe. The barge and the outer side of the SPMT are further lowered to make the bridge section completely fall on the sliding system. The bridge section can also be actively lifted by lifting the jack on the shoe.

[0023] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, in step S5, the weight transfer of the bridge section will cause the stern to lift up, and it is necessary to wait for the tide to drop or ballast the stern cabin to cause the vehicle plate to separate from the bridge section.

[0024] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jack described in the present invention, wherein: the thruster in step S6 should be set at the sliding shoe close to the center of gravity of the bridge section to avoid sliding difficulties caused by eccentricity, or the front and rear sliding shoes should be connected by a connecting rod to ensure that all sliding shoes are subjected to thrust.

[0025] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, when the bridge section slides above the landing jack in step S7, a hand winch can be used to pull up the landing jack and fix it to the upper extension beam to facilitate the position calibration of the landing jack, and at the same time, square timber is laid underneath to prepare for landing.

[0026] As a preferred solution of the offshore bridge section sliding installation method based on SPMT and jacks described in the present invention, wherein: in the step S8, if there is no extra space to set up the three-way jack, the position of the landing jack can be shared, and temporary pads are set between the bridge section and the landing pier as support, and then the landing jack is replaced with a three-way jack. If the installation position of the bridge section is relatively high, the three-way jack can also be placed directly on the landing jack.

[0027] Beneficial effects of the present invention:

[0028] 1. This application is applicable to situations where the distance between piers is small, there are obstacles in the access path to the ship, and floating installation is not possible;

[0029] 2. SPMT can realize flexible adjustment of the installation posture of the bridge section and accurate alignment with the jack shoe;

[0030] 3. The SPMT and jack hydraulic lifting system can reduce the impact of tidal changes and wave-induced barge swaying, making it easier to transfer the bridge section from the offshore barge to the fixed sliding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0032] Figure 1 It is a schematic diagram of the structure of the SPMT and the bridge section loaded on the barge in the present invention.

[0033] Figure 2 It is a schematic diagram of the structure in which the cables are fixed to the surrounding platforms in the present invention.

[0034] Figure 3 It is a schematic diagram of the structure of tightening the cable in the present invention.

[0035] Figure 4 It is a structural schematic diagram of the SPMT in the present invention entering under the bridge section, lifting up, and transporting it to the slideway beam.

[0036] Figure 5It is a structural schematic diagram of the present invention in which the SPMT is translated or rotated to align the jacking position of the bridge section with the jack shoe.

[0037] Figure 6 This is a structural schematic diagram of the secondary jacking of the SPMT in the present invention, in which the auxiliary SPMT jacks up the bridge section and the main SPMT retreats.

[0038] Figure 7 It is a structural schematic diagram of the main SPMT in the present invention that lifts and pushes the bridge section again until the bridge section is transferred to the sliding system as a whole.

[0039] Figure 8 It is a schematic diagram of the structure of the bridge section lifted by the landing jack in the present invention.

[0040] Fig. 9 It is a structural schematic diagram of the segmented slideway beam being withdrawn and the landing jack being further placed in position in the present invention.

[0041] Fig.10 This is a structural schematic diagram of the bridge section installation after the slideway beam is withdrawn in the present invention.

[0042] Fig.11 The present invention is a schematic diagram of a structure in which a landing jack temporarily places a slope on a wooden block and a three-way jack is used for precise alignment.

[0043] Fig.12 It is a schematic diagram of the structure of the present invention after the placement is completed.

[0044] Fig.13 The schematic diagram is a structural diagram of a schematic diagram of the installation of a bridge section that is inaccessible to barges in the present invention.

[0045] Fig.14 It is a structural schematic diagram of a schematic diagram of the installation of a single-cap slab rotating bridge in the present invention.

[0046] Description of the drawings: 101, main SPMT; 102, auxiliary SPMT; 103, bridge section; 104, extended beam; 105, ship pier; 106, slideway beam 106; 107, waist cable; 108, cross tail cable; 109, slideway; 110, jack in place; 111, jack shoe; 112, pad. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0050] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0051] Embodiment 1

[0052] like Figure 2 As shown in FIG. 12, a method for sliding installation of an offshore bridge section based on SPMT and a jack comprises the following steps:

[0053] Reference Figure 2 , as there is a wharf obstacle in front of the pier, conventional floating installation is not possible, so offshore sliding installation is required. The slideway beam is set on the pier in advance and extended out of the wharf. When the stern of the barge carrying SPMT and bridge section 103 approaches the slideway beam, a small boat is used to guide the barge to drop anchor and tie up.

[0054] Reference Figure 3 The barge tightens the cross tail cable 108 to penetrate between the slideway beams and fix it close to the dock.

[0055] refer to Figure 4 , 5. SPMT lifts the bridge section 103 to the stern slideway beam and adjusts the position so that the lifting position of the bridge section 103 is aligned with the jack shoe 111 on the slideway beam.

[0056] refer to Figure 6,7. Due to the limited length of the slideway beam in the example, the first reverse transportation of the bridge section 103 can only drop part of the bridge section 103 onto the sliding system, and a second jacking is required. The bridge section 103 is first lifted by the auxiliary SPMT102 and part of the jack shoe 111, and the main SPMT101 withdraws and lifts the bridge section 103 again. At this time, the jack shoe 111 and the main SPMT101 are jointly stressed, and then the main SPMT101 pushes to transfer the entire bridge section 103 to the slideway system. In this process, the SPMT and the jack hydraulic jacking system are used to work together to reduce the risk of the barge shaking to the transfer of the bridge section 103;

[0057] Compared with other transportation tools, SPMT has a higher carrying capacity per unit area and is suitable for transporting goods with large concentrated loads. The platform vehicle has a carrying capacity of up to 40t per axle. SPMT can also be designed in a modular manner, and can be used for any combination of vehicles according to the characteristics of the goods, with a high equipment utilization rate. SPMT has many steering modes, is flexible and maneuverable, has good passability, can be moved horizontally, can turn 360° on the spot, can travel diagonally, and has a stable and reliable driving and walking. It adopts a closed static hydraulic drive system composed of a variable pump and a variable motor, which can achieve stepless speed regulation and stable and reliable operation. SPMT also has synchronous operation. No matter how many axes or how many PPUs there are, they are all controlled by the signal line. After connection, it is operated and controlled by a remote control; the SPMT hydraulic cylinder is connected to the hydraulic grouping, and the pressure of the oil hydraulic cylinder is the same as that of the hydraulic grouping. Therefore, even if a certain axis is raised or lowered, its hydraulic pressure will still be the same as the pressure in the hydraulic grouping. This allows the SPMT to easily travel on undulating roads without local decompression or failure. For example, when encountering uneven roads, some axis systems will lose pressure or increase pressure. At this time, the hydraulic cylinder installed inside the axis line can self-adjust by raising or lowering to keep the lower plane of the cargo level. This means that the SPMT can be smoothly transported on barges with uneven decks, which is very suitable for offshore installation.

[0058] refer to Figure 8 9. After the bridge section 103 is completely transferred to the sliding system, the SPMT is lowered and retracted, and the bridge section 103 is slid to the installation position by the jacking device, and then the bridge section 103 is lifted by the positioning jack 110, and the slideway beam is removed in sections and then further positioned.

[0059] refer to Fig.10 , 11, 12, after the slideway beam is removed, the ramp is further positioned using the positioning jack 110. Due to the need for precise positioning and limited space, it is temporarily placed on the pad 112 of the pier 105 on the ship, and the positioning jack 110 is replaced with a three-way jack for adjustment and positioning.

[0060] The above example is an installation process designed according to the present invention for a bridge section 103 where there are obstacles in front of the bridge piers and the barge cannot enter. In addition, the present invention can also function under different installation conditions and environments. Fig.13, 14 respectively introduce the installation process of the bridge section 103 designed according to the present invention for the bridge pier spacing is small and the single-cap swivel bridge cannot be installed by floating. The former is similar to the above example and needs to be pushed by two groups of SPMT to completely place the bridge section 103 on the sliding system. The latter does not require auxiliary SPMT because the bridge section 103 itself is not large in size and can be transferred to the sliding beam at one time. However, due to the small space on the cap, the drop jack 110 can be set only after the slideway beam is removed.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for sliding installation of offshore bridge sections based on SPMT and jacks, characterized in that: The following steps are involved: S1: a slideway beam (106), a slide chute (109) and a jack shoe (111) are arranged on the bridge pier in advance; S2: Before the barge carrying the bridge section (103) and the SPMT arrives at the slideway beam (106), the mooring rope is fixed to the surrounding cap by a small boat; S3: The cable is tightened to allow the barge to enter between the slide beams (106), and the SPMT enters under the bridge section (103) to lift it up, and then transports it to the slide beam (106), and translates or rotates it so that the lifting position of the bridge section (103) is aligned with the jack shoe (111); S4: Barge ballasting, SPMT and jack hydraulic system are lifted and lowered in coordination with tide waves, so that the bridge section (103) falls onto the jack sliding shoe (111); S5: The SPMT descends further, and the ship's ballasting causes the SPMT to separate from the bridge section (103) and retreat; S6: The pusher pushes the bridge section (103) to slide along the slideway beam (106) to the installation position; S7: The bridge section (103) is lifted up by the positioning jack (110), the sliding device and the slideway beam (106) below the bridge section (103) are removed, and the bridge section (103) is further positioned; S8: Use a three-way jack to achieve precise position adjustment.

2. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1 is characterized in that: The barge is a deck barge, with waist cables (107) arranged on both sides of the barge and a cross tail cable (108) arranged at the stern of the barge. During sea transportation, the SPMT and the bridge section (103) are temporarily stowed on the deck.

3. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1 is characterized in that: The SPMT is a self-propelled hydraulic modular flatbed truck with a length of 1.4m per axis, a width of 2.43m per column, and a lifting height range of 1.2m-1.8m.

4. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1 is characterized in that: The slideway beam (106) in S1 is arranged in multiple sections so that the slideway beam (106) can be extracted after the bridge section (103) slides into place in step S7, and the slideway beam (106) is fixed to the bridge pier or the abutment, and a stopper or a card plate is arranged on the slideway beam (106) to prevent the slideway (109) from deflecting during the process of transferring the bridge section (103) to the sliding system; In the step S1, the non-top side of the jack is welded and fixed to the sliding shoe plate, and rubber is added to the top side to increase friction.

5. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1 is characterized in that: In step S3, the barge is loaded in advance to ballast the bow tank and empty the stern tank, ensuring that when the SPMT transport bridge section (103) moves to the stern, the weight of the raised stern is used to flatten the barge, so as to keep the entire barge in a flat state.

6. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1 is characterized in that: In step S4, if the length of the slideway beam (106) is insufficient to ensure that all the bridge sections (103) are transferred to the sliding system, an auxiliary SPMT (102) may be added as a temporary support, and the main SPMT (101) first drops part of the bridge section (103) on the jack shoe (111), and the auxiliary SPMT (102) temporarily lifts it up, and the main SPMT (101) retreats and lifts up the bridge section (103) again, and the main SPMT (101) pushes the bridge section (103) deeper into the slideway beam (106) until the bridge section (103) is transferred to the sliding system as a whole; In step S4, it is required to pay attention to the wave amplitude at all times. If a large turbulence occurs, the height of the SPMT should be raised to avoid the bridge section (103) from colliding with the jack shoe (111). The process of transferring the bridge section (103) to the sliding system should start from the inner shoe. At this time, the barge stern cabin begins to be ballasted and the SPMT car plate is lowered to make the bottom surface of the bridge section (103) contact the upper surface of the shoe jack. The SPMT hydraulic gauge is observed to ensure the weight transfer of the bridge section (103). Then, the SPMT position is fine-tuned to align the bridge section (103) with the outer jack shoe (111). The barge and the outer side of the SPMT are further lowered to make the bridge section (103) completely fall on the sliding system. The bridge section (103) can also be actively lifted up by the jack on the shoe.

7. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1, characterized in that: In step S5, the weight transfer of the bridge section (103) will cause the stern to lift up, and it is necessary to wait for the tide to drop or ballast the stern tank to separate the vehicle board from the bridge section (103).

8. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1, characterized in that: In step S6, the thruster should be arranged at the sliding shoe close to the center of gravity of the bridge section (103) to avoid sliding difficulties caused by eccentricity, or a connecting rod should be used to connect the front and rear sliding shoes to ensure that all sliding shoes are subjected to thrust.

9. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1, characterized in that: When the bridge section (103) slides to the top of the landing jack (110) in step S7, the landing jack (110) can be pulled up by a hand winch and fixed to the upper landing extension beam (104) to calibrate the position of the landing jack (110), and at the same time, square timber is laid below to prepare for landing.

10. The offshore bridge section sliding installation method based on SPMT and jack according to claim 1, characterized in that: In step S8, if there is no extra space to set up the three-way jack, the position of the landing jack (110) can be shared. A temporary pad (112) is set between the bridge section (103) and the pier (105) on the ship as a support, and then the landing jack (110) is replaced with a three-way jack. If the installation position of the bridge section (103) is relatively high, the three-way jack can be directly placed on the landing jack (110).

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