Cofferdam continuous sinking control equipment and control method

Abstract

The invention belongs to the technical field of bridge construction, and discloses cofferdam continuous sinking control equipment and a control method. The cofferdam continuous sinking control equipment comprises a plurality of sinking control devices, the sinking control devices are used for being connected with deformed steel bars, each sinking control device comprises a first control unit and a second control unit, and the first control units and the second control units are arranged on the deformed steel bars correspondingly; the first control unit and the second control unit both have a bearing state and a non-bearing state, when the first control unit is in the bearing state, the second control unit is in the non-bearing state, the second driving part is in running fit with the deformed steel bar, and the first driving part is used for applying acting force opposite to the gravity direction to the deformed steel bar; the deformed steel bar sinks at a constant speed in the vertical direction; the first control unit and the second control unit can be switched between a bearing state and a non-bearing state respectively. The continuous sinking control equipment for the cofferdam can control all parts of the cofferdam to synchronously and continuously sink so as to improve the construction quality.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a cofferdam continuous sinking control device and a control method. Background Art

[0002] In recent years, with the continuous development of transportation infrastructure construction, there are more and more large-span bridges. In the construction of deep-water foundations of bridges, cofferdams are indispensable temporary retaining structures; their function is to prevent water and soil from entering the trimming position of buildings or structures so as to drain water within the cofferdam, thereby facilitating the excavation of foundation pits and the construction of foundations.

[0003] When sinking and installing the existing steel cofferdam, it is necessary to first build a pile in the water as the supporting structure of the entire steel cofferdam, then set up a shoulder beam on the pile, and set a jack on the shoulder beam. The jack is connected to the cofferdam below through threaded steel bars, and the sinking and installation of the cofferdam is achieved through the action of the jack. However, the existing cofferdam sinking devices generally have problems such as inability to sink continuously and limited sinking depth, which will greatly reduce construction efficiency, thereby directly affecting construction quality, safety and construction period requirements. Summary of the invention

[0004] The object of the present invention is to provide a cofferdam continuous sinking control device and a control method, which can control the synchronous and continuous sinking of various parts of the cofferdam to improve construction safety and reliability.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A continuous sinking control system for a cofferdam comprises a mounting beam and a plurality of sinking control devices, wherein the plurality of sinking control devices are arranged on the mounting beam, and the sinking control devices are used to be connected to a threaded steel bar connected to the cofferdam, and the sinking control devices comprise:

[0007] A first control unit includes a first driving member;

[0008] A second control unit includes a second driving member, wherein the first control unit and the second control unit are respectively arranged on the threaded steel bar;

[0009] The first control unit and the second control unit both have a load-bearing state and a non-load-bearing state. When the first control unit is in the load-bearing state, the second control unit is in the non-load-bearing state, the second driving member is rotationally matched with the threaded steel, and the first driving member is used to apply a force opposite to the direction of gravity to the threaded steel, so that the threaded steel sinks vertically at a uniform speed; when the first control unit is in the non-load-bearing state, the second control unit is in the load-bearing state, the first driving member is rotationally matched with the threaded steel, and the second driving member is used to apply a force opposite to the direction of gravity to the threaded steel, so that the threaded steel sinks vertically at a uniform speed;

[0010] The first control unit and the second control unit are capable of switching between the load-bearing state and the non-load-bearing state, respectively.

[0011] Preferably, the first control unit further comprises a first rotating member, the first rotating member comprises a first inner ring and a first outer ring, the first outer ring is sleeved outside the first inner ring and the first outer ring can rotate relative to the first inner ring, the first inner ring is connected to the first driving member, and the first outer ring is used to cooperate with the thread of the threaded steel bar;

[0012] The second control unit also includes a second rotating member, which includes a second inner ring and a second outer ring. The second outer ring is sleeved outside the second inner ring and can rotate relative to the second inner ring. The second inner ring is connected to the second driving member, and the second outer ring is used to cooperate with the thread of the threaded steel bar.

[0013] Preferably, the first control unit further comprises a first matching piece, the first matching piece is arranged on the first outer ring, the threaded steel bar is passed through the first matching piece and is threadedly matched with the first matching piece;

[0014] The second control unit also includes a second matching piece, which is arranged on the second outer ring, and the threaded steel bar is passed through the second matching piece and threadedly matched with the second matching piece.

[0015] Preferably, the sinking control device further comprises a fixing seat, the first driving member and the second driving member are both fixedly connected to the fixing seat, and the fixing seat is arranged on the mounting beam.

[0016] Preferably, both the first driving member and the second driving member are hollow jacks.

[0017] The continuous sinking control method of the cofferdam uses the above-mentioned continuous sinking control system of the cofferdam, and comprises the following steps:

[0018] S1, switching the first control unit to a load-bearing state, switching the second control unit to a non-load-bearing state, starting the first driving member, the threaded steel bar sinks vertically at a uniform speed under the action of the first driving member, and the threaded steel bar rotates and cooperates with the second driving member until the driving stroke of the first driving member reaches a set distance;

[0019] S2, switching the first control unit to a non-load-bearing state, switching the second control unit to a load-bearing state, starting the second driving member, the threaded steel sinks vertically at a uniform speed under the action of the second driving member, and the threaded steel rotates in coordination with the first driving member until the driving stroke of the second driving member reaches a set distance;

[0020] S3. Repeat steps S1 to S2 until the cofferdam sinks to the designated installation position.

[0021] Preferably, the first control unit further comprises a first rotating member and a first matching member, the first rotating member comprises a first inner ring and a first outer ring, the first outer ring is sleeved outside the first inner ring and the first outer ring can rotate relative to the first inner ring, the first inner ring is connected to the first driving member, the first matching member is arranged on the first outer ring, and the threaded steel is passed through the first matching member and threadedly matched with the first matching member;

[0022] The second control unit also includes a second rotating member and a second matching member, the second rotating member includes a second inner ring and a second outer ring, the second outer ring is sleeved on the outside of the second inner ring and the second outer ring can rotate relative to the second inner ring, the second inner ring is connected to the second driving member, the second matching member is arranged on the second outer ring, and the threaded steel is penetrated through the second matching member and threadedly matched with the second matching member.

[0023] Preferably, in step S1, the threaded steel bar sinks vertically at a uniform speed under the action of the first driving member, and the threaded steel bar and the second driving member rotate in cooperation, including:

[0024] The first outer ring stops rotating, the first driving member drives the first inner ring to drive the first outer ring to move vertically downward at a uniform speed, and the first outer ring synchronously controls the threaded steel to sink vertically at a uniform speed through the first mating member mating with the thread of the threaded steel;

[0025] The second outer ring is started to make the second outer ring drive the second matching piece to rotate relative to the threaded steel bar that sinks vertically.

[0026] Preferably, the sinking speed of the threaded steel bar is v, the lead of the thread line of the threaded steel bar is S, and the rotational angular velocity of the second outer ring is n=2π·v / S.

[0027] Preferably, in step S2, the threaded steel bar sinks vertically at a uniform speed under the action of the second driving member, and the threaded steel bar and the first driving member rotate in cooperation, including:

[0028] The second outer ring stops rotating, the second driving member drives the second inner ring to drive the second outer ring to move vertically downward at a uniform speed, and the second outer ring controls the threaded steel to sink vertically synchronously and uniformly through the second matching member matched with the thread of the threaded steel;

[0029] The first outer ring is started to enable the first outer ring to drive the first matching piece to rotate relative to the threaded steel bar that sinks vertically.

[0030] The beneficial effects of the present invention are:

[0031] The continuous sinking control system of the cofferdam provided by the present invention comprises an installation beam and a sinking control device, wherein the sinking control device comprises a first control unit and a second control unit respectively arranged on the threaded steel bar, wherein the first control unit and the second control unit both have a load-bearing state and a non-load-bearing state, and when the first control unit is in a load-bearing state, the second control unit is in a non-load-bearing state, at this time, the second driving member rotates with the threaded steel bar, and the first driving member can apply a force opposite to the direction of gravity to the threaded steel bar, so that the threaded steel bar sinks vertically at a uniform speed, so that the threaded steel bar can be stably sunk and installed under the control of the first driving member; and when the first control unit is in a non-load-bearing state, the second control unit is in a load-bearing state, at this time, the first driving member rotates with the threaded steel bar, and the second driving member applies a force opposite to the direction of gravity to the threaded steel bar, so that the threaded steel bar sinks vertically at a uniform speed sinking, so the rebar can be sunk and installed under the drive of the second driving member; since the first control unit and the second control unit both have a load-bearing state and a non-load-bearing state, and the first control unit and the second control unit can respectively switch between the load-bearing state and the non-load-bearing state, the continuous sinking control system of the cofferdam can drive the cofferdam to sink continuously by the rebar through the alternating drive of the first driving member and the second driving member, without being limited by the driving stroke of a single driving member, thereby realizing the continuous sinking and installation of the cofferdam and greatly improving the construction efficiency; at the same time, since the continuous sinking control system of the cofferdam includes a plurality of sinking control devices, the plurality of sinking control devices can control all the rebars of the entire project to sink and install synchronously and uniformly, thereby ensuring the good sinking posture and installation stability of the entire cofferdam in the water, thereby improving the safety and reliability of the construction.

[0032] By using the continuous sinking control method for the cofferdam, the uniform and continuous sinking of the threaded steel bars is achieved, which is not limited by the driving stroke of a single driving component, and the construction efficiency is greatly improved. At the same time, each threaded steel bar is synchronously controlled by a number of sinking control devices connected to each threaded steel bar, ensuring the synchronous and continuous sinking of various parts of the cofferdam, thereby improving the construction quality and construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a top view of the construction of a continuous sinking control system of a cofferdam provided in a specific embodiment of the present invention.

[0034] Figure 2 It is a structural schematic diagram of a sinking control device provided in a specific embodiment of the present invention.

[0035] In the figure:

[0036] 100-rebar;

[0037] 1- Install the beam;

[0038] 2-first control unit; 21-first driving member; 22-first rotating member; 221-first inner ring; 222-first outer ring;

[0039] 3 - second control unit; 31 - second driving member; 32 - second rotating member; 321 - second inner ring; 322 - second outer ring. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] like Figure 1 and Figure 2 As shown, the present invention provides a cofferdam continuous sinking control system, which includes a mounting beam 1 and a plurality of sinking control devices, the plurality of sinking control devices are all arranged on the mounting beam 1, the sinking control devices are used to be connected to a threaded steel bar 100 connected to the cofferdam, the sinking control device includes a first control unit 2 and a second control unit 3, the first control unit 2 includes a first driving member 21, the second control unit 3 includes a second driving member 31, the first control unit 2 and the second control unit 3 are respectively arranged on the threaded steel bar 100; the first control unit 2 and the second control unit 3 both have a load-bearing state and a non-load-bearing state, when the first control unit 2 is in When in the load-bearing state, the second control unit 3 is in the non-load-bearing state, the second driving member 31 rotates with the threaded steel 100, and the first driving member 21 is used to apply a force opposite to the direction of gravity to the threaded steel 100, so that the threaded steel 100 sinks vertically at a uniform speed; when the first control unit 2 is in the non-load-bearing state, the second control unit 3 is in the load-bearing state, the first driving member 21 rotates with the threaded steel 100, and the second driving member 31 is used to apply a force opposite to the direction of gravity to the threaded steel 100, so that the threaded steel 100 sinks vertically at a uniform speed; the first control unit 2 and the second control unit 3 can switch between the load-bearing state and the non-load-bearing state, respectively.

[0045] In this embodiment, the continuous sinking control system of the cofferdam is used for the construction of underwater bridge piers. Before the construction of the bridge piers, it is necessary to first erect a number of pile barrels 200 in the water as the supporting structure of the entire cofferdam. According to the actual size of the project, 4 to 12 threaded steel bars 100 are also required to be provided to meet the sinking and installation requirements of the cofferdam steel plates in various areas; then, an installation beam 1 is erected on the pile barrel 200, and a sinking control device is provided on the installation beam 1 to sink and install the threaded steel bars 100 connected to the cofferdam steel plates. Since when the first control unit 2 is in a load-bearing state, the second control unit 3 is in a non-load-bearing state, at this time, the second driving member 31 and the threaded steel 100 are rotated and matched, and the first driving member 21 can apply a force opposite to the direction of gravity to the threaded steel 100, so that the threaded steel 100 sinks vertically at a uniform speed, so the threaded steel 100 can be stably sunk and installed under the control of the first driving member 21; and when the first control unit 2 is in a non-load-bearing state, the second control unit 3 is in a load-bearing state, at this time, the first driving member 21 and the threaded steel 100 are rotated and matched, and the second driving member 31 applies a force opposite to the direction of gravity to the threaded steel 100, so that the threaded steel 100 sinks vertically at a uniform speed, so the threaded steel 100 can be sunk and installed under the drive of the second driving member 31; The control unit 2 and the second control unit 3 both have a load-bearing state and a non-load-bearing state, and the first control unit 2 and the second control unit 3 can switch between the load-bearing state and the non-load-bearing state respectively. Therefore, the continuous sinking control system of the cofferdam can drive the cofferdam to sink continuously by the alternating driving of the first driving member 21 and the second driving member 31, without being limited by the driving stroke of a single driving member, thereby realizing the continuous sinking installation of the cofferdam and greatly improving the construction efficiency; at the same time, since the continuous sinking control system of the cofferdam includes a plurality of sinking control devices, the plurality of sinking control devices can control all the threaded steel bars 100 of the entire project to sink and install synchronously and uniformly, thereby ensuring the good sinking posture and installation stability of the entire cofferdam in the water, thereby improving the safety and reliability of the construction.

[0046] Furthermore, if Figure 2As shown, the first control unit 2 also includes a first rotating member 22 and a first matching member, the first rotating member 22 includes a first inner ring 221 and a first outer ring 222, the first outer ring 222 is sleeved on the outside of the first inner ring 221 and the first outer ring 222 can rotate relative to the first inner ring 221, the first inner ring 221 is connected to the first driving member 21, and the first outer ring 222 is used to threadedly cooperate with the threaded steel 100; the second control unit 3 also includes a second rotating member 32 and a second matching member, the second rotating member 32 includes a second inner ring 321 and a second outer ring 322, the second outer ring 322 is sleeved on the outside of the second inner ring 321 and the second outer ring 322 can rotate relative to the second inner ring 321, the second inner ring 321 is connected to the second driving member 31, and the second outer ring 322 is used to threadedly cooperate with the threaded steel 100. Specifically, the first driving member 21 and the second driving member 31 are both hollow jacks commonly used in the field, and their piston rods have a through cavity. The first rotating member 22 and the second rotating member 32 are both hollow rotating platforms commonly used in the field. The hollow rotating platforms can realize automatic rotation and stopping of the outer ring. The first inner ring 221 of the first rotating member 22 is fixedly connected to the piston rod of the first driving member 21, and the threaded steel 100 passes through the first inner ring 221, the cavity of the piston rod of the first driving member 21, the second inner ring 321 and the cavity of the piston rod of the second driving member 31 from top to bottom.

[0047] The first inner ring 221 is fixedly connected to the first driving member 21, so the first driving member 21 can drive the entire first rotating member 22 to move vertically through the first inner ring 221. Similarly, the second driving member 31 can drive the entire second rotating member 32 to move vertically through the second inner ring 321. When the first control unit 2 is in a load-bearing state, the second control unit 3 is in a non-load-bearing state. At this time, the first outer ring 222 is locked and does not rotate. The first driving member 21 controls the threaded steel 100 to descend at a uniform speed through the first rotating member 22. The threaded steel 100 does not rotate during the descent. To match this, the second outer ring 322 is started and actively rotates relative to the sinking threaded steel 100. The second driving member 31 only supports the second rotating member 32 and does not apply force to the threaded steel 100. When the driving stroke of the first driving member 21 reaches the set distance, the first control unit 21 is in a non-load-bearing state. Element 2 switches to a non-load-bearing state and the second control unit 3 switches to a load-bearing state. At this time, the second outer ring 322 is locked and does not rotate. The second driving member 31 controls the threaded steel 100 to descend at a uniform speed through the second rotating member 32. The threaded steel 100 also does not rotate during the descent. To match this, the first outer ring 222 is started and actively rotates relative to the sinking threaded steel 100. The first driving member 21 only supports the first rotating member 22 and does not apply force to the threaded steel 100. It should be noted that during this process, the piston rod of the first driving member 21 rises and drives the first rotating member 22 to rise, while the first outer ring 222 rotates with the sinking threaded steel 100 while rising, until the driving stroke of the second driving member 31 reaches the set distance. At this time, the piston rod of the first driving member 12 also rises to the maximum stroke, thereby preparing for the next state switching.

[0048] Taking the first control unit 2 in a load-bearing state and the second control unit 3 in a non-load-bearing state as an example, the following description is made: In order to prevent the threaded steel 100 from being damaged by additional axial tension or pressure during the sinking installation process, the first driving member 21 of the first control unit 2 only applies a force in the opposite direction of gravity to the threaded steel 100, the purpose of which is to ensure that the threaded steel 100 sinks at a uniform speed, and the rotation speed of the second outer ring 322 in the second control unit 3 also matches the descending speed of the threaded steel 100, preventing the second outer ring 322 from applying an axial force to the threaded steel 100. It should be noted that the sinking control device can also be used in the construction of other building projects. For some components that have no requirements for the descending speed or need to accelerate the sinking installation, during the sinking installation process, the first driving member 21 can apply a force in the same direction as gravity to the component to achieve the purpose of accelerating the sinking installation.

[0049] Specifically, the first control unit 2 further includes a first matching piece, which is arranged on the first outer ring 222, and the threaded steel bar 100 is inserted into the first matching piece and threadedly matched with the first matching piece; the second control unit 3 further includes a second matching piece, which is arranged on the second outer ring 322, and the threaded steel bar 100 is inserted into the second matching piece and threadedly matched with the second matching piece. In this embodiment, both the first matching piece and the second matching piece are flanges, and the first matching piece is connected to the first outer ring 222 by bolts, and the first matching piece has an inner gear ring, and the inner gear ring is threadedly connected to the threaded steel bar 100, so that the first outer ring 222 can be threadedly matched with the threaded steel bar 100 through the first matching piece; similarly, the second matching piece is connected to the second outer ring 322 by bolts, and the inner gear ring of the second matching piece is threadedly connected to the threaded steel bar 100. Furthermore, in order to ensure the construction depth requirements, multiple threaded steel bars 100 need to be mechanically connected along the length direction using threaded sleeves at the construction site; wherein the first mating part and the second mating part are both openable flanges, that is, they can be split into two symmetrical parts along the plane where the axis is located, the purpose of which is to allow the threaded sleeves between two adjacent threaded steel bars 100 to pass smoothly.

[0050] Furthermore, the sinking control device further includes a fixed seat, the first driving member 21 and the second driving member 31 are both fixedly connected to the fixed seat, and the fixed seat is arranged on the mounting beam 1. Specifically, the fixed seat is connected to the mounting beam 1, the fixed seat is a rectangular parallelepiped frame structure, and the first control unit 2 and the second control unit 3 are vertically fixed inside the fixed seat.

[0051] This embodiment also provides a method for controlling the continuous sinking of a cofferdam, using the above-mentioned continuous sinking control system of the cofferdam, comprising the following steps:

[0052] S1, switch the first control unit 2 to the load-bearing state, switch the second control unit 3 to the non-load-bearing state, start the first driving member 21, and the threaded steel 100 sinks vertically at a uniform speed under the action of the first driving member 21, and the threaded steel 100 rotates and cooperates with the second driving member 31 until the driving stroke of the first driving member 21 reaches the set distance. In step S1, the threaded steel 100 sinks vertically at a uniform speed under the action of the first driving member 21, and the threaded steel 100 rotates and cooperates with the second driving member 31, including: stopping the first outer ring 222 from rotating, the first driving member 21 drives the first inner ring 221 to drive the first outer ring 222 to move vertically downward at a uniform speed, and the first outer ring 222 synchronously controls the threaded steel 100 to sink vertically at a uniform speed through the first matching member that is threadedly matched with the threaded steel 100; start the second outer ring 322, so that the second outer ring 322 drives the second matching member to rotate relative to the threaded steel 100 that sinks vertically.

[0053] Specifically, one of the control units on each threaded steel bar 100 is selected as the first control unit 2, the piston rods of the first driving member 21 and the second driving member 31 are adjusted to the longest ejection position, and the second outer ring 322 of the second rotating member 32 is started, so that the second outer ring 322 actively rotates relative to the second inner ring 321, and the first outer ring 222 of the first rotating member 22 is closed at the same time, so that the first outer ring 222 and the first inner ring 221 can move synchronously along the axial direction of the threaded steel bar 100. At this time, the first control unit 2 is in a load-bearing state and the second control unit 3 is in a non-load-bearing state; under this working condition, since the first outer ring 222 does not rotate, the first outer ring 222 that is threadedly matched with the threaded steel bar 100 The ring 222 can apply a force to the threaded steel bar 100 along the axial direction of the threaded steel bar 100, and its specific working process is as follows: the piston rod of the first driving member 21 applies a force opposite to the direction of gravity to the threaded steel bar 100 through the first rotating member 22, so as to drive the threaded steel bar 100 to sink at a uniform speed, and prevent the threaded steel bar 100 from sinking faster under the action of gravity, until the retraction stroke of the piston rod of the first driving member 21 reaches the set distance, that is, the driving stroke of the first driving member 21 reaches the set distance; at the same time, the second outer ring 322 actively rotates to cooperate with the descent of the threaded steel bar 100, and because the second outer ring 322 and the threaded steel bar 100 are threadedly matched, the second control unit 3 does not move downward with the threaded steel bar 100. It can be understood that the continuous sinking control system of the cofferdam includes a plurality of sinking control devices, each of which controls a threaded steel bar 100 to sink and install the cofferdam steel plate; when the threaded steel bar 100 is being sunk and installed, each sinking control device controls each threaded steel bar 100 synchronously, thereby ensuring the synchronization and consistency of the sinking of the cofferdam steel plates at various locations.

[0054] S2, switch the first control unit 2 to the non-load-bearing state, switch the second control unit 3 to the load-bearing state, start the second driving member 31, and the threaded steel 100 sinks vertically at a uniform speed under the action of the second driving member 31, and the threaded steel 100 rotates and cooperates with the first driving member 21 until the driving stroke of the second driving member 31 reaches the set distance. Specifically, in step S2, the threaded steel 100 sinks vertically at a uniform speed under the action of the second driving member 31, and the threaded steel 100 rotates and cooperates with the first driving member 21, including: stopping the second outer ring 322 from rotating, the second driving member 31 drives the second inner ring 321 to drive the second outer ring 322 to move vertically downward at a uniform speed, and the second outer ring 322 controls the threaded steel 100 to sink vertically synchronously and uniformly through the second matching member that is threadedly matched with the threaded steel 100; start the first outer ring 222, so that the first outer ring 222 drives the first matching member to rotate relative to the threaded steel 100 that sinks vertically.

[0055] Specifically, when the piston rod of the first driving member 21 retracts to the set position, the first outer ring 222 of the first rotating member 22 is started, so that the first outer ring 222 actively rotates relative to the first inner ring 221, and the second outer ring 322 of the second rotating member 32 is closed at the same time, so that the second outer ring 322 and the second inner ring 321 can move synchronously along the axial direction of the threaded steel 100. At this time, the first control unit 2 is in a non-load-bearing state and the second control unit 3 is in a load-bearing state; under this working condition, the piston rod of the second driving member 31 applies a force opposite to the direction of gravity to the threaded steel 100 through the second rotating member 32 to drive the threaded steel 100 to sink at a uniform speed, and the first outer ring 222 actively rotates to cooperate with the sinking of the threaded steel 100, and in this process, the first outer ring 222 will move upward while rotating under the drive of the piston rod of the first driving member 21 until the piston rod of the first driving member 21 rises to the longest ejection position, thereby preparing for the next time the first control unit 2 is switched to the load-bearing state.

[0056] S3, repeating steps S1 to S2 until the cofferdam sinks to the designated installation position. In this embodiment, the first control unit 2 and the second control unit 3 alternately switch between the load-bearing state and the non-load-bearing state, and ensure that when one control unit is in the load-bearing state, the other control unit is in the non-load-bearing state, thereby ensuring that the threaded steel bar 100 drives the cofferdam to sink continuously.

[0057] Specifically, the first control unit 2 also includes a first rotating member 22 and a first matching member, the first rotating member 22 includes a first inner ring 221 and a first outer ring 222, the first outer ring 222 is sleeved on the outside of the first inner ring 221 and the first outer ring 222 can rotate relative to the first inner ring 221, the first inner ring 221 is connected to the first driving member 21, the first matching member is arranged on the first outer ring 222, the threaded steel 100 is penetrated through the first matching member and threadedly matched with the first matching member; the second control unit 3 also includes a second rotating member 32 and a second matching member, the second rotating member 32 includes a second inner ring 321 and a second outer ring 322, the second outer ring 322 is sleeved on the outside of the second inner ring 321 and the second outer ring 322 can rotate relative to the second inner ring 321, the second inner ring 321 is connected to the second driving member 31, the second matching member is arranged on the second outer ring 322, the threaded steel 100 is penetrated through the second matching member and threadedly matched with the second matching member.

[0058] Specifically, the sinking speed of the threaded steel 100 is v, and the lead of the thread line of the threaded steel 100 is S, then the rotational angular velocity n of the second outer ring 322 is 2π·v / S. In this embodiment, when the first control unit 2 is in a load-bearing state and the second control unit 3 is in a non-load-bearing state, the first driving member 21 controls the threaded steel 100 to sink at a uniform speed, and the second outer ring 322 of the second rotating member 32 actively rotates to cooperate with the descent of the threaded steel 100; in order to prevent the threaded steel 100 from being damaged by additional tension, the second outer ring 322 of the second rotating member 32 cannot apply an axial force to the threaded steel 100, so the rotational angular velocity n of the second outer ring 322 needs to match the sinking speed v of the threaded steel 100 to prevent the second outer ring 322 from rotating too fast or too slow to apply pressure or tension to the threaded steel 100 and damage the threaded steel 100.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The cofferdam continuous sinking control system is characterized by: It comprises a mounting beam (1) and a plurality of sinking control devices, wherein the plurality of sinking control devices are arranged on the mounting beam (1), the sinking control devices are used to be connected to a threaded steel bar (100) connected to a cofferdam, and the sinking control devices comprise: A first control unit (2) comprising a first driving member (21); A second control unit (3) comprising a second driving member (31), wherein the first control unit (2) and the second control unit (3) are respectively arranged on the threaded steel bar (100); The first control unit (2) and the second control unit (3) both have a load-bearing state and a non-load-bearing state. When the first control unit (2) is in the load-bearing state, the second control unit (3) is in the non-load-bearing state, the second driving member (31) is rotationally matched with the threaded steel (100), and the first driving member (21) is used to apply a force opposite to the direction of gravity to the threaded steel (100), so that the threaded steel (100) sinks vertically at a uniform speed; when the first control unit (2) is in the non-load-bearing state, the second control unit (3) is in the load-bearing state, the first driving member (21) is rotationally matched with the threaded steel (100), and the second driving member (31) is used to apply a force opposite to the direction of gravity to the threaded steel (100), so that the threaded steel (100) sinks vertically at a uniform speed; The first control unit (2) and the second control unit (3) are capable of switching between the load-bearing state and the non-load-bearing state respectively.

2. The cofferdam continuous sinking control system according to claim 1, characterized in that: The first control unit (2) further comprises a first rotating member (22), the first rotating member (22) comprising a first inner ring (221) and a first outer ring (222), the first outer ring (222) being sleeved outside the first inner ring (221) and the first outer ring (222) being rotatable relative to the first inner ring (221), the first inner ring (221) being connected to the first driving member (21), and the first outer ring (222) being used for threaded engagement with the threaded steel (100); The second control unit (3) also includes a second rotating member (32), the second rotating member (32) includes a second inner ring (321) and a second outer ring (322), the second outer ring (322) is sleeved outside the second inner ring (321) and the second outer ring (322) can rotate relative to the second inner ring (321), the second inner ring (321) is connected to the second driving member (31), and the second outer ring (322) is used to cooperate with the thread of the threaded steel (100).

3. The cofferdam continuous sinking control system according to claim 2, characterized in that: The first control unit (2) further comprises a first matching piece, the first matching piece is arranged on the first outer ring (222), the threaded steel bar (100) is passed through the first matching piece and threadably matched with the first matching piece; The second control unit (3) further comprises a second matching piece, the second matching piece is arranged on the second outer ring (322), and the threaded steel bar (100) is passed through the second matching piece and threadedly matched with the second matching piece.

4. The cofferdam continuous sinking control system according to claim 1, characterized in that: The sinking control device also includes a fixing seat, the first driving member (21) and the second driving member (31) are both fixedly connected to the fixing seat, and the fixing seat is arranged on the mounting beam (1).

5. The cofferdam continuous sinking control system according to claim 1, characterized in that: The first driving member (21) and the second driving member (31) are both hollow jacks.

6. A method for controlling the continuous sinking of a cofferdam, using the cofferdam continuous sinking control system according to any one of claims 1 to 5, comprising the following steps: S1. Switch the first control unit (2) to a load-bearing state, switch the second control unit (3) to a non-load-bearing state, start the first driving member (21), and the threaded steel (100) sinks vertically at a uniform speed under the action of the first driving member (21), and the threaded steel (100) and the second driving member (31) rotate in coordination until the driving stroke of the first driving member (21) reaches a set distance; S2, switching the first control unit (2) to a non-load-bearing state, switching the second control unit (3) to a load-bearing state, starting the second driving member (31), the threaded steel (100) sinks vertically at a uniform speed under the action of the second driving member (31), and the threaded steel (100) rotates in coordination with the first driving member (21) until the driving stroke of the second driving member (31) reaches a set distance; S3. Repeat steps S1 to S2 until the cofferdam sinks to the designated installation position.

7. The method for controlling the continuous sinking of a cofferdam according to claim 6, characterized in that: The first control unit (2) further comprises a first rotating member (22) and a first matching member, the first rotating member (22) comprising a first inner ring (221) and a first outer ring (222), the first outer ring (222) being sleeved outside the first inner ring (221) and the first outer ring (222) being rotatable relative to the first inner ring (221), the first inner ring (221) being connected to the first driving member (21), the first matching member being arranged on the first outer ring (222), the threaded steel (100) being passed through the first matching member and being threadably matched with the first matching member; The second control unit (3) further comprises a second rotating member (32) and a second matching member, wherein the second rotating member (32) comprises a second inner ring (321) and a second outer ring (322), wherein the second outer ring (322) is sleeved on the outside of the second inner ring (321) and the second outer ring (322) is rotatable relative to the second inner ring (321), the second inner ring (321) is connected to the second driving member (31), the second matching member is arranged on the second outer ring (322), and the threaded steel (100) is passed through the second matching member and threadedly matched with the second matching member.

8. The method for controlling the continuous sinking of a cofferdam according to claim 7, characterized in that: In step S1, the threaded steel bar (100) sinks vertically at a uniform speed under the action of the first driving member (21), and the threaded steel bar (100) and the second driving member (31) rotate in cooperation, including: The first outer ring (222) stops rotating, the first driving member (21) drives the first inner ring (221) to drive the first outer ring (222) to move vertically downward at a uniform speed, and the first outer ring (222) synchronously controls the threaded steel (100) to sink vertically at a uniform speed through the first mating member that is threadably mated with the threaded steel (100); The second outer ring (322) is started, so that the second outer ring (322) drives the second matching piece to rotate relative to the threaded steel bar (100) that sinks vertically.

9. The method for controlling the continuous sinking of a cofferdam according to claim 8, characterized in that: The sinking speed of the threaded steel (100) is v, the lead of the thread line of the threaded steel (100) is S, and the rotational angular velocity of the second outer ring (322) is n=2π·v / S.

10. The method for controlling the continuous sinking of a cofferdam according to claim 7, characterized in that: In step S2, the threaded steel bar (100) sinks vertically at a uniform speed under the action of the second driving member (31), and the threaded steel bar (100) and the first driving member (21) are rotationally matched, including: The second outer ring (322) stops rotating, the second driving member (31) drives the second inner ring (321) to drive the second outer ring (322) to move vertically downward at a uniform speed, and the second outer ring (322) controls the threaded steel (100) to sink vertically synchronously and at a uniform speed through a second mating member that is mated with the threaded steel (100); The first outer ring (222) is started, so that the first outer ring (222) drives the first matching piece to rotate relative to the threaded steel bar (100) that sinks vertically.

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