Vertical adjusting device for offshore steel open caisson

Abstract

The utility model discloses a vertical adjusting device for an offshore steel open caisson, which is arranged on the wall of the steel open caisson at intervals along the perimeter direction of the steel open caisson. The device comprises a counter-force seat, a supporting column, a guide steel pipe, a temporary connecting piece, a jack and a supporting cushion assembly. The counter-force seat is fixedly connected to the top of the well wall of the steel open caisson; the guide steel pipe is vertically arranged below the counter-force seat and is fixedly connected with the wall of the steel open caisson; the supporting column is arranged in the guiding steel pipe in a penetrating mode and slides relative to the guiding steel pipe in the axial direction. The difference between the inner diameter of the guide steel pipe and the outer diameter of the supporting column is not larger than 15 cm, and the supporting column is limited in the radial direction. The top of the temporary connecting piece is connected to the counter-force base, and the bottom of the temporary connecting piece is connected with the supporting column so that the supporting column can be hung below the counter-force base. The jack is arranged at the top of the supporting column; the supporting cushion assembly comprises a first part; the first part is arranged at the top of the supporting column and staggered with the jack; and the first part is used for supporting the counter-force seat, so that the jack is unloaded.

Description

TECHNICAL FIELD

[0001] The utility model relates to sinking well construction technical field especially relates to a vertical adjusting device of offshore steel sinking well. BACKGROUND

[0002] Steel sinking well foundation is applied in cross-sea bridge engineering constantly because of its advantages of strong bearing capacity, high integrity and stability, strong anti-seismic capacity and fast construction speed. It takes seabed rock layer as a bearing body to provide stable support for the upper structure. However, in actual construction, the steel sinking well is prone to tilt after falling into the seabed due to uneven seabed and uncertain sea current, which leads to the fact that the structure elevation and perpendicularity of the steel sinking well cannot meet the design requirements and the steel sinking well cannot play a supporting role. Therefore, the steel sinking well after falling into the seabed often needs to be precisely leveled, and then quick-setting concrete is filled in the bottom of the steel sinking well to keep the steel sinking well in an accurate and stable working posture. SUMMARY

[0003] The main technical problem to be solved by the utility model is to provide a vertical adjusting device of offshore steel sinking well, which can quickly, accurately and safely level the steel sinking well.

[0004] In order to solve the above technical problems, the utility model provides a vertical adjusting device of offshore steel sinking well, which is arranged on the wall of the steel sinking well and is arranged at intervals along the circumference of the steel sinking well.

[0005] The device comprises a counterforce seat, a support column, a guide steel pipe, a temporary connecting piece, a jack and a support pad assembly.

[0006] The counterforce seat is fixedly connected to the top of the wall of the steel sinking well.

[0007] The guide steel pipe is vertically arranged below the counterforce seat and is fixedly connected with the wall of the steel sinking well. The support column is arranged in the guide steel pipe and can slide along the axis of the guide steel pipe. The inner diameter of the guide steel pipe and the outer diameter of the support column differ by no more than 15 cm, so as to limit the radial movement of the support column.

[0008] The temporary connecting piece is connected to the top of the counterforce seat and the bottom of the support column, so as to hang the support column below the counterforce seat.

[0009] The jack is arranged at the top of the support column.

[0010] The support pad assembly comprises a first part. The first part is arranged at the top of the support column and is arranged in a staggered manner with the jack. The first part is used for supporting the counterforce seat, so as to unload the jack.

[0011] In a preferred embodiment, the counterforce seat is a section of a notched downward chute structure welded to the top of the steel caisson wall along the length direction; the guide steel pipe and the support column are arranged inside the wall.

[0012] In a preferred embodiment, the first part of the support cushion assembly comprises a cushion beam and a plurality of first cushion steel plates; the first cushion steel plates are stacked on the top of the support column; the cushion beam is arranged above the first cushion steel plates and welded to the bottom of the counterforce seat.

[0013] In a preferred embodiment, the support cushion assembly further comprises a second part; the second part is arranged at the bottom of the jack;

[0014] The second part comprises a concrete cushion block and a second cushion steel plate; the concrete cushion block and the second cushion steel plate are stacked along the height direction.

[0015] In a preferred embodiment, the support column adopts a round steel pipe.

[0016] In a preferred embodiment, the support column is provided with a support structure near the top; the support structure is a three-dimensional structure welded by a plurality of steel plates; the support structure is arranged inside the support column and welded to the inner wall of the support column.

[0017] In a preferred embodiment, the temporary connecting member comprises a threaded steel bar; the threaded steel bar penetrates the counterforce seat and the support structure along the vertical direction; the threaded steel bar is sleeved with a nut at the top of the counterforce seat and the bottom of the support structure to limit the vertical cooperation with the support column.

[0018] In a preferred embodiment, the temporary connecting member is at least two; the temporary connecting member is symmetrically arranged about the cross-sectional center of the support column.

[0019] In a preferred embodiment, the number of jacks is two; the two jacks are arranged in a central symmetry about the cross-sectional center of the support column.

[0020] In a preferred embodiment, the inner wall of the guide steel pipe is pasted with a pasting plate along the circumference direction; the cross-sectional size enclosed by the pasting plate is not less than the maximum cross-sectional size of the support column

[0021] In a preferred embodiment, the inner wall of the guide steel pipe is pasted with a pasting plate along the circumference direction; the cross-sectional size enclosed by the pasting plate is not less than the maximum cross-sectional size of the support column.

[0022] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0023] The device provided by the utility model creates stable support system for the jack through the mode that the support column abuts against seabed rock stratum, so that the jack can adjust the elevation and perpendicularity of the steel sinking well through jacking or lowering the reaction force base accurately, the device is simple in structure, stable in connection, and reliable in force transmission, realizes fast and accurate leveling of the steel sinking well, improves the construction efficiency and the construction safety of offshore engineering.

[0024] In addition, the arrangement of the guide steel pipe overcomes the uncertainty of underwater positioning construction and provides stable guidance for the support column. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a vertical arrangement diagram of the offshore steel sinking well vertical adjusting device in the embodiment of the utility model;

[0026] Figure 2 It is a front view schematic diagram of the device support column when it is not lowered (parallel to the extension direction of the well wall);

[0027] Figure 3 It is a side view schematic diagram of the device support column when it is not lowered (perpendicular to the extension direction of the well wall);

[0028] Figure 4 It is a front view schematic diagram of the device support column after it is lowered (parallel to the extension direction of the well wall);

[0029] Figure 5 It is a side view schematic diagram of the device support column after it is lowered (perpendicular to the extension direction of the well wall);

[0030] Figure 6 It is a cross-sectional schematic diagram of the guide steel pipe;

[0031] Figure 7 It is a plane schematic diagram of the support structure;

[0032] Figure 8 It is a plane schematic diagram of part of the support pad assembly.

[0033] Marked in the figure: 1-marine steel caisson vertical fine adjustment device, 2-counterforce seat, 3-support column, 31-support structure, 4-guiding steel pipe, 41-pasting plate, 5-threaded steel bar, 51-nut, 6-jack, 7-supporting pad assembly, 71-concrete pad, 72-I-beam pad beam, 73-first supporting pad steel plate, 74-second supporting pad steel plate, 8-caisson wall. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be wall-mounted connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0037] As shown in Figures 1-8 The embodiment of the present application provides a marine steel caisson vertical fine adjustment device 1, which is arranged on the steel caisson wall 8 and is arranged at intervals along the circumference direction of the steel caisson. The device 1 comprises a counterforce seat 2, a support column 3, a guiding steel pipe 4, a threaded steel bar 5, a jack 6 and a supporting pad assembly 7.

[0038] As shown in Figures 1-5As shown, the cross section of the counterforce seat 2 is in the shape of a Chinese character "men", and the whole is like a notched downward chute, which is welded to the top of the steel caisson wall 8 along the length direction. Specifically, the two sides of the counterforce seat 2 are welded to the inner and outer sides of the wall 8, and the top is higher than the wall 8 by a certain height, which provides installation space for the jack 6 and the support cushion assembly 7. The counterforce seat 2 is composed of several steel plates welded together, so that it has high structural rigidity in the vertical direction. The support column 3 is a section of circular steel pipe, which is vertically arranged below the counterforce seat 2. In this embodiment, the support column 3 is arranged in the wall 8. It can be understood that, in order to ensure the structural sealing of the steel caisson as a whole, the wall 8 is provided with a separate compartment with the bottom open only at the position where the support column 3 is arranged, and the wall 8 is sealed at the bottom at the remaining positions. The fixing and limiting mode of the support column 3 is described below.

[0039] As shown in Figures 1-5 , the guide steel pipe 4 is arranged in the wall 8 and is welded to the wall 8 through several connecting plates extending from the wall 8. It is necessary that the guide steel pipe 4 is vertically arranged. The support column 3 is arranged in the guide steel pipe 4 and can relatively slide along the axial direction of the guide steel pipe 4. The inner diameter of the guide steel pipe 4 is not more than 15 cm different from the outer diameter of the support column 3, so as to limit the support column 3 in the radial direction and make it maintain better verticality during the lowering construction. Preferably, as shown in Figure 6 , several sticking plates 41 are welded to the inner wall of the guide steel pipe 4 along the circumferential direction, so as to provide reinforcement and protection to the guide steel pipe 4 itself during the relative sliding. It can be easily understood that the inner diameter enclosed by the several sticking plates 41 is not less than the outer diameter of the support column 3. In this embodiment, the outer diameter of the support column 3 is 1000 mm and the thickness is 16 mm; the outer diameter of the guide steel pipe 4 is 1080 mm and the thickness is 12 mm.

[0040] In other embodiments, the counterforce seat 2 can also extend vertically along the lateral direction of the wall 8. The guide steel pipe 4 is fixed to the inner side or the outer side of the steel caisson through a plurality of fixing frames extending from the steel caisson wall 8. The support column 3 is arranged in the guide steel pipe 4 and vertically arranged below the extended section of the counterforce seat 2.

[0041] As shown in Figures 2-5 , in the vertical direction, the support column 3 is temporarily fixed below the counterforce seat 2 through several threaded steel bars 5. Specifically, in combination with Figure 4 , Figure 5 and Figure 7The support column 3 is welded with steel plates inside the column in a length close to the top to form a three-dimensional support structure 31. The support structure 31 is welded with the inner wall of the support column 3. The steel plates in the support structure 31 are welded in multiple directions to make the support structure 31 have high integrity and structural rigidity in the vertical direction. The threaded steel bars 5 pass through the support structure 31 in the counterforce seat 2 and the support column 3 in the vertical direction, and are sleeved with nuts 51 at the top of the counterforce seat 2 and the bottom of the support structure 31. The nuts 51 are hung below the counterforce seat 2 by thread cooperation with the threaded steel bars 5, and the height of the support column 3 can be adjusted by rotating the nuts 51. As an equivalent alternative of the embodiment, the threaded steel bars 5 can also be provided with nuts at the bottom of the support structure 31 in other embodiments, which can also be limited in the vertical direction with the support column 3. It can be understood that the threaded steel bars 5, nuts 51 or nuts described above are temporary connecting members. In order to ensure the stability of the hanging connection, the threaded steel bars 5 in the embodiment are made of 25mm diameter finished threaded steel. Further, as shown in Figure 6 , the combination of the threaded steel bars 5 and nuts 51 is provided with 2, and is arranged symmetrically about the cross-sectional center of the support column 3. In other embodiments, the combination of the threaded steel bars 5 and nuts 51 can be four or more.

[0042] As shown in Figure 4 , Figure 5 , the jack 6 is installed at the top of the support column 3. In the embodiment, two jacks 6 are installed at the top of each support column 3, and the two jacks 6 are arranged symmetrically about the cross-sectional center of the support column 3 to prevent the device 1 from being eccentrically stressed. In the embodiment, the jack 6 is a self-locking hydraulic jack with a maximum tension of 400 tons. As shown in Figure 4 and Figure 8As shown, the support pad assembly 7 comprises a pad steel plate, a concrete pad block 71 and an I-beam pad beam 72, the pad steel plate comprises a first pad steel plate 73 and a second pad steel plate 74. Between the jack 6 and the support column 3, the concrete pad block 71 and the second pad steel plate 74 are arranged in turn from bottom to top, not only by reducing the jacking stroke of the jack 6 to improve the structural stability, but also by increasing the stress area to provide protection for the support column 3. In other embodiments, if the height of the pad under the jack 6 is large, a steel beam can be used instead of the concrete pad block 71 and the second pad steel plate 74 for pad. At the top of the support column 3 and in the position opposite to the jack 6, the second pad steel plate 74 is arranged. Preferably, the embodiment further comprises the pad beam above the first pad steel plate 73. Two 50cm high pad beams are welded to the bottom of the counterforce seat 2, which reduces the number of stacked first pad steel plates 73 below and improves the overall stability of the support pad structure. The functions of the first pad steel plate 73 and the pad beam are to realize the stress system conversion of the top of the support column 3. Specifically, after the jack 6 completes the height adjustment work, the second pad steel plate 74 is stacked at the bottom of the pad beam to support the counterforce seat 2, so that the upper load from the counterforce seat 2 is gradually transferred from the jack 6 to the pad beam and the first pad steel plate 73, thereby releasing the jack 6. It is not difficult to understand that, in terms of function, the pad beam and the first pad steel plate 73 are the first part, and the concrete pad block 71 and the second pad steel plate 74 are the second part.

[0043] In order to further understand the working principle of the device 1, the process of adjusting the height of the steel caisson of the device 1 is summarized as follows. The process comprises the following steps:

[0044] 1) When the steel caisson lands on the seabed rock layer, the support column 3 is lowered by releasing the threaded steel bars 5 until the support column 3 stably abuts against the seabed rock layer.

[0045] 2) According to the attitude data fed back by the sensors and monitoring instruments arranged on the steel caisson, the height of the counterforce seat 2 is jacked up or lowered by the jack 6 to drive the steel caisson to rise or fall at this point. After adjustment, the steel caisson is leveled to meet the design requirements, and the verticality should be less than 1 / 100.

[0046] 3) After the above leveling work is completed, the second pad steel plate 74 is inserted into the pad beam on both sides of the jack 6 to unload the jack 6.

[0047] 4) Fill the capsule concrete which can be quickly solidified at the bottom of the steel caisson. After the strength of the capsule concrete reaches the design requirement, the jacks 6 are jacked up to slowly unload the support columns 3, so as to gradually transfer the upper load to the capsule concrete. During the system conversion, the verticality of the steel caisson needs to be monitored synchronously, and if the verticality deviation does not meet the requirement, a steel member is needed to be inserted at the bottom of the steel caisson to adjust the level.

[0048] 5) Remove the support columns 3 and the jacks 6.

[0049] In summary, the device 1 creates a stable support system for the jacks 6 by using the support columns 3 to abut the seabed rock stratum, so that the jacks 6 can accurately adjust the elevation and verticality of the steel caisson by jacking up or lowering the reaction force seat 2. The device 1 has a simple structure, stable connection, direct and reliable force transmission, and realizes the rapid and accurate leveling of the steel caisson, which not only improves the construction efficiency, but also improves the construction safety of offshore engineering. In addition, the setting of the guide steel pipe 4 overcomes the uncertainty of underwater positioning construction and provides stable guidance for the support columns 3. The threaded steel bars 5 can reliably temporarily hang the support columns 3 through the threaded cooperation with the nuts 51, and also facilitate the subsequent lowering of the support columns 3 by the construction personnel. The above two points improve the accuracy and efficiency of underwater construction.

[0050] The above is only the preferred specific implementation mode of the present application, and is not limited to the patent range of the present application. Any equivalent transformation made by using the content of the present application is within the protection scope of the present application.

Claims

1. A vertical adjustment device for a steel caisson offshore, characterized in that: They are installed on the wall of the steel caisson and arranged at intervals along the circumference of the steel caisson. The device includes a reaction seat, a support column, a guide steel pipe, a temporary connector, a jack, and a support assembly; The reaction seat is fixed to the top of the steel caisson wall; The guide steel pipe is vertically arranged below the reaction seat and is fixedly connected to the wall of the steel caisson; the support column passes through the guide steel pipe and slides relative to the guide steel pipe along the axial direction; the inner diameter of the guide steel pipe and the outer diameter of the support column differ by no more than 15cm to limit the support column in the radial direction. The temporary connector is connected to the reaction seat at the top and to the support column at the bottom, so that the support column can be suspended below the reaction seat; The jack is positioned at the top of the support column; The support assembly includes a first part; the first part is disposed on the top of the support column and is offset from the jack; the first part is used to support the reaction seat, thereby unloading the jack.

2. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The reaction seat is a downward-facing chute structure welded to the top of the steel caisson wall along its length; the guide steel pipe and the support column are located inside the caisson wall.

3. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The first part of the support assembly includes a pad beam and several first pad steel plates; the first pad steel plates are stacked on top of the support column; the pad beam is disposed above the first pad steel plates and welded to the bottom of the reaction seat.

4. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The support assembly further includes a second part; the second part is disposed at the bottom of the jack; The second part includes a concrete pad and a second pad steel plate; the concrete pad and the second pad steel plate are stacked along the height direction.

5. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The support column is made of round steel pipe.

6. A vertical adjustment device for a steel caisson offshore according to claim 5, characterized in that: The support column has a support structure near the top; the support structure is a three-dimensional structure welded from several steel plates; the support structure is located inside the support column and is welded to the inner wall of the support column.

7. A vertical adjustment device for a steel caisson offshore according to claim 6, characterized in that: The temporary connector includes a threaded steel bar; the threaded steel bar passes vertically through the reaction seat and the support structure; the threaded steel bar is fitted with nuts at the top of the reaction seat and the bottom of the support structure to limit the movement of the support column vertically.

8. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The temporary connectors are at least two in number; the temporary connectors are arranged symmetrically about the cross-section center of the support column.

9. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The number of jacks is two; the two jacks are arranged in a centrally symmetrical manner about the cross-section center of the support column.

10. A vertical adjustment device for offshore steel caissons according to claim 1, characterized in that: The inner wall of the guide steel pipe is welded with a plate along the circumference; the cross-sectional dimension enclosed by the plate is not less than the maximum cross-sectional dimension of the support column.

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