Steel open caisson leveling mechanism

Abstract

The utility model discloses a steel open caisson leveling mechanism which is arranged on the inner side of a steel open caisson and arranged at intervals in the perimeter direction of the steel open caisson. The leveling mechanism comprises a counter-force seat, a leveling column, a limiting hoop, a jack and a construction platform. The counter-force seat is fixedly connected to the top of the well wall of the steel open caisson and extends out of a jacking part along the inner side of the steel open caisson; the leveling column is vertically arranged below the jacking part; a plurality of limiting hoops extend out of the inner side of the well wall at intervals in the height direction so as to limit the leveling column in the radial direction; the jack is arranged at the top of the leveling column and is symmetrical about the cross section center of the leveling column; the construction platform is erected below the counter-force base and provides a working face for installing the jack and lifting and placing the leveling column. The stress support of the construction platform is the well wall of the steel open caisson.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sinking well construction technical field especially relates to a steel sinking well leveling mechanism. BACKGROUND

[0002] Steel sinking well foundation is continuously applied in cross-sea bridge engineering with the advantages of strong bearing capacity, high integrity and stability, strong anti-seismic capacity and fast construction speed. It takes seabed rock stratum as a bearing body to provide stable support for the upper structure. However, in actual construction, due to the influence of uneven seabed and uncertain sea current, the steel sinking well is prone to tilt after falling on the seabed, which leads to the fact that the structure elevation and perpendicularity of the steel sinking well cannot meet the design requirements, and the supporting role cannot be played. The steel sinking well after the seabed is often accurately leveled, and then the quick-setting concrete is filled in the bottom of the steel sinking well, so that the steel sinking well can maintain accurate and stable working posture. SUMMARY

[0003] The utility model provides a steel sinking well leveling mechanism, 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 steel sinking well leveling mechanism, which is arranged on the inner side of the steel sinking well and is arranged at intervals along the circumference direction of the steel sinking well.

[0005] The leveling mechanism comprises a counterforce seat, a leveling column, a limiting hoop, a jack and a construction platform.

[0006] The counterforce seat is fixedly connected to the top of the well wall of the steel sinking well and extends out a jacking part along the inner side of the steel sinking well.

[0007] The leveling column is vertically arranged below the jacking part.

[0008] The inner side of the well wall extends out a plurality of limiting hoops at intervals along the height direction to limit the leveling column in the radial direction.

[0009] The jack is arranged on the top of the leveling column.

[0010] The construction platform is arranged below the counterforce seat to provide a working surface for installing the jack and lifting the leveling column, and the stress support of the construction platform is the well wall of the steel sinking well.

[0011] In a preferred embodiment, the leveling mechanism further comprises a hanging assembly, and the hanging assembly comprises a plurality of first lifting lugs, second lifting lugs and hand-operated hoists.

[0012] The first lifting lug is arranged on the counterforce support; the second lifting lug is arranged on the leveling column near the top of the column and is arranged in a spaced manner along the circumference of the leveling column; and the hand chain block is used for lifting or lowering the leveling column or hoisting the jack.

[0013] In a preferred embodiment, the leveling mechanism further comprises a plurality of pads; the pads are arranged on the top of the leveling column and are arranged in a staggered manner with the jacks; and the pads are stacked in the height direction to support the jacking part, thereby releasing the jacks.

[0014] In a preferred embodiment, the leveling mechanism further comprises a steel plate; the steel plate is arranged between the jacks and the counterforce support and between the jacks and the top of the leveling column.

[0015] In a preferred embodiment, the construction platform comprises a platform plate; the platform plate is provided with a plate hole in the middle; the plate hole is arranged in a corresponding position in the vertical direction of the leveling column and has a cross-sectional dimension not less than the outermost peripheral dimension of the leveling column.

[0016] In a preferred embodiment, the construction platform further comprises a triangular strut; the triangular strut is fixedly connected to the inner side of the shaft wall and supports the platform plate at the top.

[0017] In a preferred embodiment, the material of the construction platform is a steel plate; and the material of the triangular strut is a profile steel.

[0018] In a preferred embodiment, the top of the counterforce support is fixedly connected with a suspension support; and the suspension support is used for hoisting the jacks.

[0019] In a preferred embodiment, the counterforce support further comprises a stiffening plate; the stiffening plate is fixedly connected to the inner side of the shaft wall in a vertical manner at the side and is fixedly connected to the bottom of the counterforce support at the top.

[0020] In a preferred embodiment, the number of the jacks is two; and the two jacks are arranged in a central symmetrical manner about the cross-sectional center of the leveling column.

[0021] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0022] The leveling mechanism provided by the utility model creates a stable support system for the jacks by using the leveling column to abut against the seabed, so that the jacks can lift or lower the counterforce support, thereby accurately adjusting the elevation and perpendicularity of the steel open caisson. The leveling mechanism has a simple working principle, direct and reliable force transmission, and realizes fast and accurate leveling of the steel open caisson.

[0023] The leveling mechanism provided by the utility model provides the construction platform under the counterforce seat, provides the necessary operation surface for the construction personnel to install the jack and to put and take the leveling column, and further improves the construction efficiency and construction safety.

[0024] The leveling mechanism provided by the utility model is provided with the hanging assembly, is simple in structure, convenient to install, enables the construction personnel to conveniently and labor-savingly complete the hoisting of the jack and the putting and taking of the leveling column. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a plane layout schematic view of the leveling mechanism in the utility model embodiment.

[0026] Figure 2 It is a vertical layout schematic view of the leveling mechanism in the utility model embodiment.

[0027] Figure 3 It is a schematic view of the leveling mechanism in the utility model embodiment when only hanging the leveling column.

[0028] Figure 4 It is a schematic view of the leveling mechanism in the utility model embodiment along the well wall direction view angle.

[0029] Figure 5 It is a schematic view of the leveling mechanism in the utility model embodiment along the well wall direction view angle.

[0030] Figure 6 It is a plane schematic view of the construction platform in the utility model embodiment.

[0031] In the drawing, 1 is a steel caisson leveling mechanism, 2 is a counterforce seat, 21 is a jacking part, 22 is a stiffened plate, 23 is a suspension support, 3 is a leveling column, 4 is a limiting hoop, 5 is a jack, 6 is a construction platform, 61 is a platform plate, 611 is a plate hole, 62 is a triangular support, 63 is a guardrail, 7 is a hanging assembly, 71 is a first lifting lug, 72 is a second lifting lug, 73 is a hand-operated hoist, 8 is a steel plate, 9 is a I-beam pad, and 10 is a well wall. DETAILED DESCRIPTION

[0032] The technical solutions in the utility model embodiments will be clearly and completely described below with reference to the drawings in the utility model embodiments; obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] like Figures 1-6 As shown, this embodiment of the utility model provides a steel caisson leveling mechanism 1, including a reaction seat 2, a leveling column 3, a limiting hoop 4, a jack 5, and a construction platform 6. The steel caisson leveling structure 1 will be simplified to a leveling mechanism 11 below.

[0036] like Figure 1 , Figure 2 As shown, the leveling mechanism 1 is located inside the steel caisson and is arranged at intervals along its perimeter. Specifically, in this embodiment, the steel caisson is rectangular, and two leveling mechanisms 1 are spaced apart on each side wall 10. The leveling mechanism 1 is designed to adjust the height of the steel caisson at its location so that the verticality and elevation of the steel caisson meet the design requirements.

[0037] from Figures 1-4 It can be seen that the leveling mechanism 1 is integrally set on the inner side of the well wall 10. The reaction seat 2 is vertically fixed to the top of the well wall 10 and extends into the inner side of the steel caisson as a lifting part 21. The connection between the reaction seat 2 and the well wall 10 can be welding, bolting, or a combination of both. A section of I20 I-beam is also welded to the top of the reaction seat 2 to provide a suspension support 23 for the subsequent hoisting of the leveling column 3 and the jack 5. To improve structural rigidity, a triangular stiffening plate 22 is also provided between the reaction seat 2 and the well wall 10. The side of the stiffening plate 22 is vertically fixed to the inner side of the well wall 10, and the top is fixed to the bottom of the reaction seat 2.

[0038] The leveling column 3 is vertically arranged below the jacking part 21, and keeps a distance of about 1.0 meter with the shaft wall 10 to ensure that it is not disturbed when being lowered. In order to ensure that the leveling column 3 can maintain a good verticality when being lowered without being affected by water flow, the shaft wall 10 extends several limiting hoops 4 along the height direction at intervals on the inside, to limit the leveling column 3 in the radial direction. It can be understood that the inner diameter of the limiting hoop 4 is as close as possible to the outer diameter of the leveling column 3, and there is no fastening effect on the leveling column 3.

[0039] Before the leveling column 3 is lowered, it is temporarily hoisted below the counterforce seat 2. Therefore, the leveling mechanism 1 also comprises a hoisting assembly 7. The hoisting assembly 7 comprises first lifting lugs 71, second lifting lugs 72 and hand-operated hoists 73. As shown in the figure, the counterforce seat 2 is provided with four first lifting lugs 71, and correspondingly, the leveling column 3 is also provided with four second lifting lugs 72 at a distance of 1.5 meters from the top of the column. The second lifting lugs 72 are arranged at intervals along the circumference of the leveling column 3. Four pairs of hand-operated hoists 73 with a lifting capacity of 25 tons are respectively passed through the first lifting lugs 71 and the second lifting lugs 72, to hoist the leveling column 3. The hand-operated hoists 73 are simple in structure and easy to install, and can help the construction personnel to realize the lifting and lowering of the leveling column 3 with a small pulling force. Figures 2-5

[0040] As shown in the figure, between the top of the leveling column 3 and the bottom of the counterforce seat 2, the jack 5 is arranged. In this embodiment, the jack 5 is a self-locking hydraulic jack. The jack 5 is arranged with a steel plate 8 between the leveling column 3 and the counterforce seat 2, so that not only the jacking stroke of the jack 5 can be reduced to improve the structural stability, but also the force receiving area can be increased to provide protection for the counterforce seat 2 and the leveling column 3. Preferably, in this embodiment, the top of each leveling column 3 is provided with two jacks 5. In order to avoid eccentric force on the leveling column 3, the two jacks 5 are arranged in central symmetry about the cross-sectional center of the leveling column 3. As shown in the figure, in order to release the jack 5 for subsequent conversion of the force system, several blocks of pads are arranged on the top of the leveling column 3, and the pads are arranged in a staggered manner with the jacks 5. In this embodiment, the pads are I-beam pads 9. When the jack 5 completes the leveling work, the I-beam pads 9 are stacked in the height direction, and when the stacking height is greater than the jack 5, the jacking part 21 is jacked up, the upper load from the counterforce seat 2 is transferred from the jack 5 to the I-beam pad 9 itself, thereby releasing the jack 5, and completing the conversion of the force system. Figure 4 Figure 5

[0041] As shown in the figure, the jacking part 21 is arranged with a plurality of jacking pads 22. The jacking pads 22 are arranged in a staggered manner with the jacks 5. In this embodiment, the jacking pads 22 are I-beam pads 9. When the jacks 5 complete the leveling work, the I-beam pads 9 are stacked in the height direction, and when the stacking height is greater than the jacks 5, the jacking part 21 is jacked up, the upper load from the counterforce seat 2 is transferred from the jacks 5 to the I-beam pad 9 itself, thereby releasing the jacks 5, and completing the conversion of the force system. Figures 2-6 ​​​As shown, the construction platform 6 is temporarily erected 2.0 meters below the counterforce seat 2 to provide a necessary working surface for installing the jack 5 and lifting the leveling column 3. The construction platform 6 comprises a platform plate 61, triangular braces 62 and guardrails 63. Like an air conditioner outdoor unit, the platform plate 61 is fixed to the inner wall of the steel caisson by the triangular braces 62 at the bottom of both sides. Specifically, the triangular braces 62 are fixed to the inner side of the caisson wall 10 at the side edges and welded to the platform plate 61 at the top to support the platform plate 61. In this embodiment, the platform plate 61 is made of a 20mm steel plate and the triangular braces 62 are made of I20 H-beams. As shown, Figure 6 The platform plate 61 is provided with a plate hole 611 in the middle. The plate hole 611 corresponds to the vertical position of the leveling column 3 and has a cross-sectional dimension not less than the outermost dimension of the leveling column 3 and the second lifting lug 72 to allow the leveling column 3 and the second lifting lug 72 to pass vertically. Additionally, to improve construction safety, the construction platform 6 is provided with the guardrails 63 made of steel pipes with a diameter of 50mm around the periphery. Standing on the construction platform 6, the construction personnel can easily lift the leveling column 3 by the hand-operated hoist 73, thereby reducing the construction difficulty. At the same time, the construction personnel can rely on the construction platform 6 to pull the jack 5 and complete the hoisting of the jack 5 in cooperation with the suspension support 23 at the top of the counterforce seat 2.

[0042] Before describing the installation and use method of the leveling mechanism 1, the working principle thereof is briefly introduced herein. When the steel caisson lands on the seabed, due to the unevenness of the seabed rock stratum, the verticality and structural elevation of the steel caisson cannot meet the design requirements, thereby failing to be used as a bridge foundation to bear the load. Therefore, the leveling column 3 is lowered and abuts against the seabed to stably transmit the upper load to the seabed and create necessary working conditions for the jack 5 at the top of the column. Then, the jack 5 takes the seabed as a force point and jacks up or lowers the counterforce seat 2, thereby driving the steel caisson to rise or descend at the node. The coordination of each group of the leveling mechanism 1 can adjust the elevation and verticality of the steel caisson to be within the design allowable deviation.

[0043] To better understand the technical solution, the installation and use method of the leveling mechanism 1 are briefly introduced below.

[0044] Step 1: Install the leveling mechanism 1. Weld the counterforce seat 2 prepared in advance on the well wall 10 of the steel caisson, and weld the suspension support 23 on the counterforce seat 2. Then erect the construction platform 6 at a position 2.0 meters below the counterforce seat 2. Then use the chain hoist 73 to connect the counterforce seat 2 and the head of the leveling column 3, and hoist the leveling column 3 relying on the construction platform 6. Weld the limiting hoop 4 on the inner wall of the well wall 10 to limit the leveling column 3 in the horizontal direction.

[0045] Step 2: Lower the leveling column 3. After the steel caisson is installed and stabilized, slowly and orderly lower the leveling column 3 by releasing the chain hoist 73 until the leveling column 3 abuts against the seabed.

[0046] Step 3: Hoist the jack 5. Install the chain hoist 73 on the suspension support 23 of the counterforce seat 2, and use the chain hoist 73 to lift the jack 5 to the installation height. Then use the traction rope to pull the jack 5 horizontally to the top of the leveling column 3. If necessary, the jack 5 needs to be provided with the steel plate 8 at the top and the bottom before it is finally positioned.

[0047] Step 4: Level the steel caisson. Collect the attitude data of the steel caisson by the GNSS monitor installed on the steel caisson, and measure and check the attitude data by the total station. According to the checked and confirmed attitude data, calculate the difference between the actual elevation of each monitoring point at the top of the steel caisson and the design elevation. Then, according to the difference of the elevation, use the jack 5 to lift or lower the counterforce seat 2 to gradually position the steel caisson to the design elevation. Then, insert the I-beam pad 9 between the two jacks 5 at the top of each leveling column 3 to transfer the upper load from the counterforce seat 2 to the I-beam pad 9, thereby releasing the jack 5. The leveling work of the steel caisson is completed.

[0048] Step 5: Convert the bearing system. Fill the quick-setting concrete at the bottom of the steel caisson. After the quick-setting concrete is formed, the load of the steel caisson can be transferred from the leveling column 3 to the quick-setting concrete, and the conversion of the bearing system is completed. At this time, the leveling mechanism 1 can be removed from the steel caisson.

[0049] The above is only the preferred specific embodiment of the present application, and is not a limitation on 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 steel caisson levelling mechanism characterised in that: The leveling mechanism is arranged inside the steel caisson and is arranged along the circumferential direction of the steel caisson. The leveling mechanism comprises a counterforce seat, a leveling column, a limiting hoop, a jack and a construction platform. The counterforce seat is fixed to the top of the shaft wall of the steel caisson and extends out a jacking part along the inside of the steel caisson. The leveling column is vertically arranged below the jacking part. The inside of the shaft wall extends out a plurality of limiting hoops along the height direction to limit the radial direction of the leveling column. The jack is arranged on the top of the leveling column. The construction platform is arranged below the counterforce seat to provide a working surface for installing the jack and lifting the leveling column.

2. A steel caisson levelling mechanism according to claim 1, characterised in that: The construction platform is supported by the shaft wall of the steel caisson. The leveling mechanism further comprises a hanging assembly.

3. A steel caisson leveling mechanism as claimed in claim 1, wherein: The first lifting lug is arranged on the counterforce seat.

4. A steel caisson leveling mechanism as claimed in claim 1, wherein: The second lifting lug is arranged on the leveling column near the top of the column and is arranged along the circumferential direction of the column.

5. A steel caisson leveling mechanism as claimed in claim 1, wherein: The hand-operated hoist is used to lift the leveling column or hoist the jack.

6. A steel caisson levelling mechanism according to claim 5 wherein: The leveling mechanism further comprises a plurality of pads.

7. A steel caisson levelling mechanism according to claim 6 wherein: The pads are arranged on the top of the leveling column and are arranged opposite to the jack.

8. A steel caisson leveling mechanism as claimed in claim 1, wherein: The pads are stacked along the height direction to support the jacking part, thereby releasing the jack.

9. A steel caisson leveling mechanism as claimed in claim 1, wherein: The construction platform further comprises a triangular support.

10. A steel caisson leveling mechanism as claimed in claim 1, wherein: The triangular support is fixed to the inside of the shaft wall and supports the platform plate at the top. The material of the construction platform is a steel plate. The material of the triangular support is a profile steel. The counterforce seat further comprises a stiffening plate. The stiffening plate is vertically fixed to the inside of the shaft wall and is fixed to the bottom of the counterforce seat. The number of jacks is two. The two jacks are arranged in a central symmetric manner about the cross-sectional center of the leveling column.

Images