Underwater pier column local sealing device, air supply system and sealing method

Abstract

The invention discloses an underwater pier column local sealing device, an air supply system and a sealing method, and relates to the technical field of bridge underwater structure reinforcement. The underwater pier column local sealing device comprises a connecting jacket arranged outside an underwater pier column in a sleeving mode; the upper bearing mechanism and the lower bearing mechanism are arranged in the connecting jacket; the air bag is arranged between the upper bearing mechanism and the lower bearing mechanism; a built-in air bag of a connecting jacket is adopted as an inflation bottom sealing structure, the air bag is controlled by an overwater air supply system to be inflated and deflated, an upper bearing mechanism and a lower bearing mechanism are driven to be automatically unfolded and connected to a pier column to be repaired in a lap joint mode, a stable annular sealed cavity is formed, the construction difficulty and manual dependence are reduced, assistance of divers is not needed, and the construction efficiency is improved; and reinforcement construction can be rapidly completed under the non-drainage condition, the influence on river channel navigation is small, operation is easy and efficient, and reliability is high.

Description

Technical Field

[0001] This invention relates to the field of underwater bridge structure reinforcement technology, and in particular to a local sealing device, air supply system and sealing method for underwater pier columns. Background Technology

[0002] With the rapid development of modern infrastructure construction, underwater structures (such as piers) in fields such as bridges, ports, and marine engineering often face complex environmental and load effects during long-term service. Especially in the underwater environment, piers are susceptible to erosion, freeze-thaw cycles, chemical corrosion, cavitation abrasion, and external impacts (such as floods, earthquakes, and ship collisions), leading to problems such as concrete deterioration, spalling, localized hollowing, necking, exposed reinforcement, and corrosion. These problems not only threaten the safety of the underwater structure but also seriously affect the overall service life of the project.

[0003] Traditional jacket methods face numerous technical bottlenecks in practical applications, especially in critical underwater construction stages such as jacket installation and positioning, bottom sealing, and grouting. These processes typically rely on diver-assisted operations, but the complex and variable underwater environment makes diver operations not only inefficient but also poses significant safety risks, while also presenting substantial challenges to construction accuracy and quality control.

[0004] Based on the above problems, we propose a local sealing device, air supply system and sealing method for underwater piers. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this invention is: how to achieve efficient and reliable sealing of local areas of the pier in an underwater environment, avoiding the problems of high construction difficulty, low efficiency and great safety hazards caused by relying on divers in traditional methods.

[0006] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a partial sealing device for underwater piers, which includes a connecting jacket sleeved on the outside of the underwater pier.

[0007] An upper support mechanism and a lower support mechanism are provided inside the connecting jacket;

[0008] An airbag is located between the upper support mechanism and the lower support mechanism.

[0009] In a preferred embodiment of the underwater pier partial sealing device of the present invention: the upper support mechanism includes a plurality of upper support plates arranged in a ring above the airbag.

[0010] In a preferred embodiment of the underwater pier partial sealing device of the present invention: a first hinge is provided between the plurality of upper bearing plates and the inner wall of the connecting jacket.

[0011] In a preferred embodiment of the underwater pier partial sealing device of the present invention: the lower support mechanism includes a plurality of lower support plates arranged in a ring below the airbag.

[0012] In a preferred embodiment of the underwater pier partial sealing device of the present invention: a second hinge is provided between the plurality of lower bearing plates and the inner wall of the connecting jacket.

[0013] In a preferred embodiment of the underwater pier partial sealing device of the present invention: an inflation tube is connected to the outer wall of the airbag, and an inflation pump is connected to one end of the inflation tube.

[0014] The present invention also proposes an underwater pier local sealing air supply system, which includes a control unit, including a control panel, a pressure sensor and a microprocessor;

[0015] The control panel presets an air pressure value, the pressure sensor detects the air pressure inside the airbag in real time, and the microprocessor compares the actual pressure value with the preset pressure value to control the working state of the inflation pump based on the result.

[0016] The present invention also proposes a method for partial sealing of underwater piers, which includes hinged an upper support mechanism and a lower support mechanism to the inner wall of a connecting jacket via a first hinge and a second hinge, respectively, and placing an airbag between the two.

[0017] Start the air supply system and inflate the airbag through the air pump and air hose.

[0018] In a preferred embodiment of the underwater pier partial sealing method of the present invention: the airbag expands to push the upper support mechanism and the lower support mechanism to unfold, so that the lower support mechanism overlaps on the surface of the underwater pier to form a bottom sealing structure.

[0019] Underwater non-dispersible concrete was poured into the connecting jacket, and airbags were used as a temporary support structure.

[0020] In a preferred embodiment of the underwater pier partial sealing method of the present invention: the upper support mechanism unfolds and is obliquely inserted into the concrete to form a sealing concrete bottom;

[0021] After the initial setting of the bottom sealing concrete, a second pour is carried out. The bottom sealing work connecting the bottom of the jacket is undertaken by the bottom sealing concrete, and the support work is undertaken by the bottom sealing concrete and the upper support mechanism. The airbag can be withdrawn from the work.

[0022] The beneficial effects of this invention are as follows: by using an airbag built into the connecting jacket as an inflatable sealing structure, the inflation and deflation of the airbag is controlled by the water supply system, which drives the upper support mechanism and the lower support mechanism to automatically unfold and overlap on the pier to be repaired, forming a stable annular sealed cavity. This reduces the difficulty of construction and the reliance on manual labor, eliminates the need for divers, and improves construction efficiency. Moreover, the reinforcement construction can be completed quickly without drainage, with minimal impact on river navigation. The operation is simple, efficient, and highly reliable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0024] Figure 1 A schematic diagram of the overall connection structure of the sealing device is shown;

[0025] Figure 2 A schematic diagram of the connection structure between the airbag and the upper and lower support mechanisms is shown;

[0026] Figure 3 A cross-sectional view of the sealing device connection structure is shown;

[0027] Figure 4 It shows Figure 3 The enlarged view of section "A" in the diagram is a schematic diagram of the connection structure between the connecting jacket and the upper and lower support mechanisms.

[0028] Figure 5 A schematic diagram of the connecting jacket installation is shown;

[0029] Figure 6 An exploded view of the connection structure between the airbag and the upper and lower support mechanisms is shown. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of the invention.

[0032] Reference Figures 1-6This embodiment provides a partial sealing device for an underwater pier, including a connecting jacket 1 fitted over the underwater pier D. The connecting jacket 1 is preferably annular or cylindrical in shape and can provide reinforcement and sealing support for the underwater pier D. An upper support mechanism 2 and a lower support mechanism 3 are located inside the connecting jacket 1. The upper support mechanism 2 and the lower support mechanism 3 are located on the upper and lower sides of the airbag 4, respectively, to support the airbag 4 and limit its deformation, and to provide space for the bottom sealing concrete. After the concrete has initially set, the upper support mechanism 2 is not fully deployed and can participate in the support by oblique insertion, thereby enhancing the overall structural stability. After the airbag 4 is inflated, the lower support mechanism 3 fully deploys and overlaps the surface of the underwater pier D as the weight of the concrete increases, forming a stable support structure. The airbag 4 is located between the upper support mechanism 2 and the lower support mechanism 3. The airbag 4 is bonded to the upper support mechanism 2 and the lower support mechanism 3 by adhesive, and its outer wall is connected to the surface air supply system through an inflation pipe 41.

[0033] In one embodiment provided in this application, the upper support mechanism 2 includes a plurality of upper support plates 21 arranged in a ring above the airbag 4. The number of upper support plates 21 is generally 30-36, and the specific number is adjusted according to the inner diameter of the jacket 1 and the size of the pier to be repaired, so as to ensure that the support effect after deployment is uniform and stable. The upper support plate 21 is trapezoidal thin sheet with a narrower upper bottom edge and a wider lower bottom edge, and can be hinged to the inner wall of the connecting jacket 1 through the first hinge 22. Each upper support plate 21 is preferably made of aluminum sheet with a thickness of about 3mm. The height of the trapezoidal aluminum sheet is designed to be 1.2-1.4 times the gap between the connecting jacket 1 and the underwater pier D to be repaired, and the bending strength design value is not less than 20MPa to ensure that it has sufficient support capacity.

[0034] In one embodiment provided in this application, a first hinge 22 is provided between a plurality of upper support plates 21 and the inner wall of the connecting jacket 1. The upper support plates 21 can rotate around the first hinge 22, so as to automatically unfold when the airbag 4 is inflated. The first hinge 22 is designed to withstand a shear force of not less than 30N to ensure that the upper support plates 21 can work stably during the unfolding process. Since each upper support plate 21 needs an independent hinge point to realize the function of rotating around the first hinge 22, the number of first hinges 22 corresponds one-to-one with the number of upper support plates 21.

[0035] In one embodiment provided in this application, the lower support mechanism 3 includes a plurality of lower support plates 31 arranged in a ring below the airbag 4. The lower support plates 31 are trapezoidal thin sheets with a narrower upper bottom edge and a wider lower bottom edge, and can be hinged to the inner wall of the connecting jacket 1 via a second hinge 32. Each upper support plate 21 is preferably made of aluminum sheet with a thickness of about 3 mm. The height of the trapezoidal aluminum sheet is designed to be 1.2-1.4 times the gap between the connecting jacket 1 and the underwater pier D to be repaired, and the bending strength design value is not less than 20 MPa to ensure that it has sufficient support capacity. The number of lower support plates 31 and upper support plates 21 is preferably the same, forming a symmetrical distribution, thereby ensuring that the airbag 4 is subjected to uniform force when it inflates. However, in some special cases, such as when the inner diameter of the connecting jacket 1 is small, the number of upper support plates 21 can be reduced to save space, while the number of lower support plates 31 is still kept at a high level to meet the support requirements.

[0036] In one embodiment provided in this application, a second hinge 32 is provided between a plurality of lower bearing plates 31 and the inner wall of the connecting jacket 1. The lower bearing plates 31 can rotate around the second hinge 32, so that they automatically unfold when the airbag 4 is inflated and overlap the surface of the underwater pier column D as the weight of the concrete increases. The second hinge 32 is designed to withstand a shear force of not less than 30N to ensure that the lower bearing plates 31 can work stably during the unfolding process. The number of second hinges 32 is equal to the number of lower bearing plates 31.

[0037] In one embodiment provided in this application, an inflation tube 41 is connected to the outer wall of the airbag 4. The inflation tube 41 passes through and connects the jacket 1 to the airbag 4. One end of the inflation tube 41 is connected to an inflation pump 42, and the other end is sealed to the airbag 4 to prevent gas leakage. The inflation tube 41 serves as a connection channel between the airbag 4 and the external air supply system. The inflation pump 42 delivers gas into the airbag 4, causing the airbag 4 to inflate.

[0038] In use, the bottom-sealing airbag 4 is pre-attached to the inner wall of the connecting jacket 1 with adhesive, and is tightly attached to the upper support mechanism 2 and the lower support mechanism 3. The prefabricated connecting jacket 1 is lowered to the designated position along the underwater pier D using hoisting equipment, ensuring that the connecting jacket 1 is fitted onto the outside of the underwater pier D and is accurately positioned. The control unit 201 presets the air pressure value through the control panel 201a and starts the air pump 202, which inflates the bottom-sealing airbag 3 through the air inflator 203. As the airbag 4 expands, it pushes the bottom-sealing airbag 4 tightly attached to the inner wall of the connecting jacket 1. Several upper bearing plates 21 and several lower bearing plates 31 are deployed around the first hinge 22 and the second hinge 32 respectively, until the bottom sealing airbag 4 is fully inflated, and the other side is tightly attached to the surface of the underwater pier D to be repaired, forming a temporary bottom sealing effect. At this time, the airbag 4 performs the temporary bottom sealing work, and it is not considered whether the upper support mechanism 2 and the lower support mechanism 3 are fully deployed. Using the connecting jacket 1 as a construction template, underwater self-stressing non-dispersing concrete of not less than 20cm in height is poured into the bottom of the cavity formed between the connecting jacket 1 and the underwater pier D through a conduit or other equipment. For the initial structural concrete sealing, the upper support mechanism 2 is inserted obliquely into the concrete to enhance structural stability. As the weight of the concrete increases, the not fully deployed lower support mechanism 3 continues to rotate around the second hinge 32 until it overlaps the underwater pier D, forming a stable and solid support structure. At this time, the surface air supply system continues to operate. The pressure sensor 52 monitors the air pressure inside the airbag 3 in real time through the air inlet pipe 41, and the microprocessor 53 automatically adjusts the working state of the inflation pump 42 to ensure stable air pressure inside the airbag 3, thereby ensuring the stability of the sealing. Once the initial concrete sealing is completed... After setting, the bottom sealing system enters the second stage. At this time, the initially set bottom sealing concrete and the upper support mechanism 2 together form a whole and undertake the bottom sealing function. The airbag 3 no longer undertakes the bottom sealing task and can withdraw from the work, that is, the gas in the airbag 3 is released. The bottom sealing work of the cavity formed between the jacket 1 and the underwater pier D is undertaken by the initially set bottom sealing concrete, and the support work is completed by the bottom sealing concrete and the upper support mechanism 2 working together. After the bottom sealing concrete has initially set, subsequent reinforcement construction can be carried out, such as secondary concrete pouring or other repair processes. After the construction is completed, the air inlet pipe 41 can be cut off.

[0039] Reference Figure 1 This embodiment provides an underwater pier local sealing air supply system, including a control unit 5, which includes a control panel 51, a pressure sensor 52 and a microprocessor 53;

[0040] The control panel 51 has a preset air pressure value, which users can set according to construction needs. The pressure sensor 52 detects the air pressure inside the airbag 4 in real time through the inflation tube 41. The microprocessor 53 compares the actual pressure value with the preset pressure value. If the actual air pressure is lower than the preset value, the microprocessor 53 controls the inflation pump 42 to start and inflate the airbag 4. If the actual air pressure is higher than the preset value, the microprocessor 53 controls the inflation pump 42 to stop working or release some gas.

[0041] Reference Figures 1-6 This embodiment provides a method for partial sealing of underwater piers, which includes hinged an upper support mechanism and a lower support mechanism to the inner wall of a connecting jacket via a first hinge and a second hinge, respectively, and placing an airbag between the two.

[0042] Start the air supply system and inflate the airbag through the air pump and air hose.

[0043] In one embodiment provided in this application, the airbag inflates to push the upper support mechanism and the lower support mechanism to unfold, so that the lower support mechanism overlaps the surface of the underwater pier to form a bottom sealing structure.

[0044] Underwater non-dispersible concrete was poured into the connecting jacket, and airbags were used as a temporary support structure.

[0045] In one embodiment provided in this application, the upper support mechanism extends obliquely into the concrete to form a sealing concrete.

[0046] After the initial setting of the bottom sealing concrete, a second pour is carried out. The bottom sealing work connecting the bottom of the jacket is undertaken by the bottom sealing concrete, and the support work is undertaken by the bottom sealing concrete and the upper support mechanism. The airbag can be withdrawn from the work.

[0047] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A partial sealing device for underwater piers, characterized in that: include, A connecting jacket (1) fitted onto the outside of the underwater pier (D); An upper support mechanism (2) and a lower support mechanism (3) are provided inside the connecting jacket (1); An airbag (4) is located between the upper support mechanism (2) and the lower support mechanism (3).

2. The underwater pier partial sealing device according to claim 1, characterized in that: The upper support mechanism (2) includes a plurality of upper support plates (21) arranged in a ring above the airbag (4).

3. The underwater pier partial sealing device according to claim 2, characterized in that: A first hinge (22) is provided between the plurality of upper support plates (21) and the inner wall of the connecting jacket (1).

4. The underwater pier partial sealing device according to claim 1, characterized in that: The lower support mechanism (3) includes a plurality of lower support plates (31) arranged in a ring below the airbag (4).

5. The underwater pier partial sealing device according to claim 3, characterized in that: A second hinge (32) is provided between the plurality of lower support plates (31) and the inner wall of the connecting jacket (1).

6. The underwater pier partial sealing device according to claim 2 or 4, characterized in that: The outer wall of the airbag (4) is connected to an inflation tube (41), and one end of the inflation tube (41) is connected to an inflation pump (42).

7. A partial sealing air supply system for underwater piers, characterized in that: Including the underwater pier partial sealing device as described in any one of claims 1 to 6, and further comprising: The control unit (5) includes a control panel (51), a pressure sensor (52), and a microprocessor (53); The control panel (51) presets the air pressure value, the pressure sensor (52) detects the air pressure inside the airbag (4) in real time, and the microprocessor (53) compares the actual pressure value with the preset pressure value and controls the working state of the inflation pump (42) according to the result.

8. A method for partial sealing of underwater piers, characterized in that: Including the underwater pier partial sealing air supply system as described in claim 7, further comprising, The upper support mechanism and the lower support mechanism are respectively hinged to the inner wall of the connecting jacket via the first hinge and the second hinge, and the airbag is placed between the two. Start the air supply system and inflate the airbag through the air pump and air hose.

9. The method for partial sealing of underwater piers according to claim 8, characterized in that: The airbag inflates and pushes the upper and lower support mechanisms to unfold, so that the lower support mechanism overlaps with the surface of the underwater pier to form a bottom sealing structure. Underwater non-dispersible concrete was poured into the connecting jacket, and airbags were used as a temporary support structure.

10. The method for partial sealing of underwater piers according to claim 9, characterized in that: The upper support mechanism extends and is inserted obliquely into the concrete to form a sealing concrete. After the initial setting of the bottom sealing concrete, a second pour is carried out. The bottom sealing work connecting the bottom of the jacket is undertaken by the bottom sealing concrete, and the support work is undertaken by the bottom sealing concrete and the upper support mechanism. The airbag can be withdrawn from the work.

Images