Double-wall steel cofferdam sinking positioning adjustable guide limiting device

Abstract

The utility model discloses a double-wall steel cofferdam sinking positioning adjustable guiding and limiting device which comprises a suspended beam, a positioning device and a positioning device. The jack is fixed on the suspended beam; the adjusting device is fixedly connected to the cofferdam wall body through a fixing device, the end, away from the cofferdam wall body, of the adjusting device is in an arc shape, and the shape of the adjusting device is consistent with that of the outer wall of the steel casing; the steel strand is vertically arranged, one end of the steel strand is connected with the telescopic end of the jack, the other end of the steel strand is connected with the adjusting device, and the device has the advantages that the position adjusting precision is easy to control, operability is high, applicability is wide, and underwater complex operation is little.

Description

Technical Field

[0001] The utility model relates to the field of steel cofferdam construction, and more specifically, to a double-wall steel cofferdam sinking positioning adjustable guide limit device. Background Art

[0002] In the deep-water foundation construction of cross-river and cross-sea bridges, double-walled steel cofferdams are widely used to provide a dry working environment for the construction of the pedestal. The positioning of the double-walled steel cofferdam is the most important step in the construction, which is directly related to the construction accuracy and quality of the pedestal. During the lowering process, the water flow, waves, mud surface height difference, and imbalance in the process of connecting the height and sinking will cause the steel cofferdam to have a certain horizontal deviation and tilt. In the project, a guide device is usually set on the wall or steel casing to assist the lowering of the steel cofferdam to ensure that the deviation of the cofferdam is controllable, stable and safe. Commonly used guide devices mainly involve non-adjustable guide structures and screw push-type guide structures. The non-adjustable guide structure is suitable for the cofferdam construction with high steel casing setting accuracy and good processing accuracy. Other measures are required to complete the plane positioning of the cofferdam during implementation. The screw push-type guide structure has a certain degree of adjustability, but it is suitable for situations with small horizontal loads and is difficult to operate. Divers are required to screw the screw underwater to adjust the limit. Conventional guide devices have poor adjustment performance and operability, and their application limitations are obvious. Utility Model Content

[0003] In order to achieve these purposes and other advantages according to the utility model, a preferred embodiment of the utility model provides a double-walled steel cofferdam sinking positioning adjustable guide limit device, comprising:

[0004] A hanging beam, which is vertically fixed on the cofferdam wall;

[0005] a jack fixed on the hanging beam;

[0006] An adjusting device, which is fixedly connected to the cofferdam wall through a fixing device, wherein one end of the adjusting device away from the cofferdam wall is arc-shaped, and its shape is consistent with the shape of the outer wall of the steel casing;

[0007] The steel strand is arranged vertically, one end of which is connected to the telescopic end of the jack, and the other end is connected to the adjusting device.

[0008] Preferably, a long hole is provided on the contact surface between the adjusting device and the fixing device, and a positioning bolt passes through the long hole to achieve a fixed connection between the fixing device and the adjusting device.

[0009] Preferably, the fixing device and the adjusting device are both wedge-shaped blocks.

[0010] Preferably, a tetrafluoroacetylene plate is provided at one end of the adjusting device away from the cofferdam wall and at the contact surface between the adjusting device and the fixing device.

[0011] Preferably, the hanging beam is provided with a through hole for the steel strand to pass through.

[0012] Preferably, the fixing device and the adjusting device are in contact with each other to form a recessed portion and a protruding portion respectively, and the protruding portion of the adjusting device extends into the recessed portion of the fixing device.

[0013] The utility model includes at least the following beneficial effects: the adjustable guide limit device of the utility model meets the requirements of adjusting the offset of different planes of the cofferdam by adjusting the angle and length of the wedge block of the guide device, and the device has the advantages of easy control of positioning accuracy, strong operability, wide applicability, and less complex underwater operations.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view of the adjustable guide limit device for sinking and positioning of the double-wall steel cofferdam in the utility model.

[0016] Figure 2 It is a top view of the adjustable guide limit device for sinking and positioning of the double-wall steel cofferdam in the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0019] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0020] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0021] like Figure 1-2 As shown, a preferred embodiment of the utility model provides a double-walled steel cofferdam sinking positioning adjustable guide limit device, comprising:

[0022] The hanging beam 1 is vertically fixed on the cofferdam wall 2; the hanging beam 1 is provided with a through hole for the steel strand to pass through.

[0023] A jack 3, which is fixed on the hanging beam 1;

[0024] An adjusting device 4, which is fixedly connected to the cofferdam wall 2 through a fixing device 5, wherein one end of the adjusting device 4 away from the cofferdam wall is arc-shaped, and its shape is consistent with the shape of the outer wall of the steel casing 6;

[0025] The steel strand 7 is vertically arranged, one end of which is connected to the telescopic end of the jack, and the other end is connected to the adjusting device.

[0026] In the above technical solution, the height of the adjusting device is adjusted by lifting or moving down the steel strand 7. After the height of the adjusting device is adjusted to the right position, all the adjusting devices are fixed to adjust the plane deviation of the cofferdam.

[0027] In another technical solution, the fixing device 5 and the adjusting device 4 are both wedge-shaped blocks.

[0028] A long hole is provided on the contact surface of the adjusting device 4 and the fixing device 5, and a positioning bolt 9 passes through the long hole to realize the fixed connection between the fixing device 5 and the adjusting device 4, and is fixed by a bolt structure, which is convenient for later installation and removal.

[0029] In another technical solution, a tetrafluoroacetylene plate 8 is provided on one end of the adjusting device 4 away from the cofferdam wall 2 and on the contact surface between the adjusting device 4 and the fixing device 5. The tetrafluoroacetylene plate 8 is smooth and has low friction resistance. The provision of the tetrafluoroacetylene plate 8 can reduce the friction during adjustment and facilitate adjustment.

[0030] In another technical solution, the fixing device and the adjusting device are in contact with each other to form a recessed portion and a protruding portion respectively, and the protruding portion of the adjusting device extends into the recessed portion of the fixing device, so that the limiting and fixing effect is better.

[0031] The usage of this device is as follows:

[0032] S1. When processing the cofferdam, set the guide device and hanging beam at the corresponding position of the wall;

[0033] S2. Water is put under the cofferdam, the steel strands are passed between the guide device and the hanging beam, a jack is set on the hanging beam, and the guide fixing device and the adjusting device are temporarily locked;

[0034] S3. Before the steel cofferdam is placed on the bed, the jack is pressurized, and the adjusting device is lifted or lowered by the steel strand. After adjustment, the positioning bolts are locked to accurately position the cofferdam plane;

[0035] S4, the cofferdam continues to absorb mud and sink;

[0036] S5. The steel cofferdam sinks into place and the plane deviation is controllable.

[0037] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A double-walled steel cofferdam sinking positioning adjustable guide limit device, characterized in that: include: A hanging beam, which is vertically fixed on the cofferdam wall; a jack fixed on the hanging beam; An adjusting device, which is fixedly connected to the cofferdam wall through a fixing device, wherein one end of the adjusting device away from the cofferdam wall is arc-shaped, and its shape is consistent with the shape of the outer wall of the steel casing; The steel strand is vertically arranged, one end of which is connected to the telescopic end of the jack, and the other end of which is connected to the adjusting device.

2. The double-walled steel cofferdam sinking positioning adjustable guide limit device according to claim 1 is characterized in that: A long hole is provided on the contact surface between the adjusting device and the fixing device, and a positioning bolt passes through the long hole to realize a fixed connection between the fixing device and the adjusting device.

3. The double-walled steel cofferdam sinking positioning adjustable guide limit device according to claim 2 is characterized in that: The fixing device and the adjusting device are both wedge-shaped blocks.

4. The double-walled steel cofferdam sinking positioning adjustable guide limit device according to claim 1 is characterized in that: A tetrafluoroacetylene plate is arranged on one end of the regulating device away from the cofferdam wall and on the contact surface between the regulating device and the fixing device.

5. The double-walled steel cofferdam sinking positioning adjustable guide limit device according to claim 1 is characterized in that: The hanging beam is provided with a through hole for the steel strand to pass through.

6. The double-walled steel cofferdam sinking positioning adjustable guide limit device according to claim 1 is characterized in that: The fixing device and the adjusting device are in contact with each other and are respectively concave and convex to form a concave part and a convex part, and the convex part of the adjusting device extends into the concave part of the fixing device.

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