A method of using a continuously operating water-blocking seal

Abstract

A method for using a continuous-operation water-blocking sealing device, relating to the field of caisson maintenance technology, includes the following steps: Step S1: Install the water-blocking sealing device at the caisson; Step S2: After the maintenance work is completed, first remove the part of the water-blocking sealing device that is fixed to the caisson, then extend the connecting component to peel the working port of the water-blocking box from the side wall of the caisson. After the water-blocking box is peeled off, only the traveling wheels press on the maintenance side wall of the caisson, and seawater is poured into the water-blocking box from the working port; Step S3: When the water-blocking box is filled with seawater, start the traveling device to move along the side wall of the caisson and stop after moving to the next maintenance point; Step S4: After stopping, fix the traveling device on the upper surface of the caisson, then retract the connecting component to reseal the working port of the water-blocking box on the side wall of the caisson, and reinstall the part of the water-blocking sealing device that is fixed to the caisson; Step S5: After the water-blocking sealing device is fixedly installed, drain the water from the water-blocking box.

Description

Technical Field

[0001] This invention relates to the field of caisson maintenance technology, specifically to a method of using a continuous-operation water-blocking sealing device. Background Technology

[0002] Gravity wharves are a widely used type of wharf structure in my country. They have good frost resistance, are sturdy, and are easy to construct. Gravity wharves are classified into integral masonry type, block masonry type, caisson type, and buttress type according to their wall structure. Among them, caisson wharves mostly use a continuous arrangement of caissons. Caisson-type wharves are subject to long-term seawater erosion, often resulting in cracks, fissures, or surface peeling on the seaward side. Therefore, the common method for repairing caisson-type wharves is to use manual diving to fill leaks with materials such as sealant. Before sealing, the surface must be roughened to remove moss and damaged areas. Underwater repair is extremely difficult due to buoyancy and poses no safety risk to the workers. Especially in autumn and winter, when temperatures plummet and winds are strong, large pieces of the caisson surface often peel off. If workers were to go underwater for repairs, firstly, the low seawater temperature would make the working environment even more harsh and dangerous, and secondly, the repair area would be large, requiring the pouring of additional concrete. This necessitates going underwater to install and seal the pouring formwork before draining the water and pouring the concrete, resulting in a huge workload and low repair efficiency.

[0003] To overcome the various difficulties of manual repair, a water-blocking and sealing device capable of underwater construction was developed, with publication number CN110747804B. The key point of this technology is to create a dry construction area with a sealed space on the repair side wall of the caisson through a sealing box and a fixing device. Although it is more convenient and efficient than manual repair, it also has certain limitations: the connection between the water-blocking box and the side wall of the caisson is fixed, and it can only be used to repair one area of ​​the side wall of the caisson at a time. After the repair is completed, the fixing device needs to be completely removed, the entire device needs to be lifted to the next construction point, and then the device needs to be reinstalled and fixed before drainage construction can begin. The transfer procedure of the entire device between construction points is very complicated, the efficiency of transfer and installation is still not high, and it requires the cooperation of large equipment such as cranes, resulting in high costs. Summary of the Invention

[0004] To address the problems of the prior art, this invention provides a continuously operating water-blocking sealing device and its usage method. Based on existing water-blocking sealing devices, improvements are made by adding the ability for the water-blocking sealing device to move along the side wall of the caisson, enabling the water-blocking caisson to move and be fixedly sealed between different construction points, thereby improving the efficiency of transfer and installation and reducing investment costs.

[0005] The objective of this invention can be achieved through the following technical solution: A continuously operating water-blocking and sealing device includes a water-blocking tank with an open top, an operating port on the side wall of the water-blocking tank, a water-blocking and sealing part at the operating port, the water-blocking and sealing part sealing the water-blocking tank to the side wall of a caisson, a fastening assembly on the water-blocking tank, the fastening assembly fixing the water-blocking tank to the caisson; a traveling device is provided on the upper surface of the caisson, a telescopic connecting assembly is installed on the traveling device, the connecting assembly extends outward from the side wall of the caisson and is fixedly connected to the water-blocking tank, the traveling device drives the water-blocking tank to move along the length direction of the caisson, and when the connecting assembly extends, it can peel the water-blocking tank off the side wall of the caisson.

[0006] By using this invention, the fastening assembly is opened, the connecting assembly extends, and the water blocking box is detached from the side wall of the caisson, so that the working port is away from the side wall of the caisson. The connecting assembly suspends the water blocking box and moves it through the walking device, moving the water blocking box along the side wall of the caisson to the next maintenance construction point.

[0007] Preferably, the walking device includes a frame and rollers disposed on the lower end faces of the four corners of the frame. The frame includes a crossbeam located above the side wall of the caisson on the side away from the water-blocking tank. The connecting assembly is fixedly installed on the crossbeam. The rollers press against the upper end faces of the two side walls of the caisson, and limit rings are provided on the end faces of the rollers facing the outer side walls.

[0008] Preferably, an inverted U-shaped fixing plate is fitted onto the mounting shaft at the upper end of the roller, and the two ends of the fixing plate are bent outward vertically to form ear plates. The ear plates are attached to the upper end surface of the side wall of the caisson and anchored with bolts. On the side wall of the caisson away from the water blocking box, there are two rollers, and a clamping plate is installed downward at one end of the two rollers located on the outer side wall. A clamping screw is installed on the clamping plate and its end is used to press against the side wall of the caisson.

[0009] Preferably, a motor reducer is installed on the upper end of each of the two rollers above the side wall of the caisson where the water-blocking tank is installed. The motor reducer is connected to the corresponding lower roller via a conveyor belt, and the two motor reducers start and stop synchronously.

[0010] Preferably, the connecting assembly includes a fixed base, a diagonal brace, and an upright. The fixed base is fixed to the crossbeam, and the upright is fixed above the side of the water-blocking tank facing the side wall of the caisson, with the upright extending upwards. The diagonal brace includes a core rod and a telescopic sleeve rod fitted on the core rod. The end of the core rod is hinged to the fixed base, and the end of the sleeve rod is hinged to the upper end of the upright. A hydraulic jack is installed at the connection between the core rod and the sleeve rod. The base of the hydraulic jack is fixed to the outer wall of the core rod, and the telescopic shaft end of the hydraulic jack is fixed to the outer wall of the sleeve rod. A support member is provided below the sleeve rod. The support member includes an arc-shaped support plate and a tripod. The tripod is installed on the frame, and the arc-shaped support plate is installed on the upper end of the tripod. The sleeve rod is supported on the arc-shaped support plate, and the central axis of the arc-shaped support plate is parallel to the central axis of the sleeve rod.

[0011] Preferably, an auxiliary walking component is installed on the lower bottom surface of the water-blocking tank. The auxiliary walking component includes a mounting base and a walking wheel. The axle of the walking wheel is vertically arranged, and the wheel surface is close to the maintenance side wall of the caisson.

[0012] The present invention also provides a method of using a continuously operating water-blocking sealing device, comprising the following steps:

[0013] Step S1: Install a water-blocking sealing device at the caisson, and maintenance personnel perform maintenance work inside the water-blocking sealing device;

[0014] Step S2: After the maintenance work is completed, first remove the part of the water-blocking sealing device that is fixed to the caisson, then extend the connecting component and peel the working port of the water-blocking box from the side wall of the caisson. After the water-blocking box is peeled off, only the running wheels press on the maintenance side wall of the caisson, and seawater flows into the water-blocking box from the working port.

[0015] Step S3: After the water-blocking tank is filled with seawater, start the walking device to move along the side wall of the caisson and stop after reaching the next maintenance point.

[0016] Step S4: After stopping, the walking device is fixed on the upper surface of the caisson, and then the connecting assembly is retracted so that the working port of the water blocking box is resealed on the side wall of the caisson. The water blocking sealing device and the part fixed to the caisson are reinstalled.

[0017] Step S5: After the water-blocking sealing device is fixedly installed, drain the water from the water-blocking tank, and maintenance personnel enter the water-blocking tank to carry out maintenance work.

[0018] Preferably, the above steps also include:

[0019] In step S1, installing the water-blocking sealing device at the caisson specifically includes: first, hoisting the traveling device and placing it on the upper surface of the caisson, then hoisting the water-blocking box so that the working opening is close to the maintenance side wall of the caisson and lowering it down, after the water-blocking box is lowered, installing the fastening components to fix and seal the water-blocking box to the maintenance side wall of the caisson, finally installing the connecting components, and then draining the water from the water-blocking box.

[0020] In step S2, after the water-blocking sealing device is removed from the part fixed to the caisson, the extension of the connecting assembly specifically includes: the hydraulic jack extending, the sleeve extending and pushing the upper end of the fixed rod to rotate towards the seawater side. During the extension of the sleeve, the entire water-blocking box first rotates around the lower edge of the working port as the pivot. When the water-blocking box rotates until the traveling wheel presses on the maintenance side wall of the caisson, the working port is completely separated from the maintenance side wall of the caisson. At this time, the working port of the water-blocking box is peeled off from the side wall of the caisson.

[0021] In step S4, after the walking device is fixed on the upper surface of the caisson, the retraction of the connecting assembly specifically includes: the hydraulic jack retracts, the sleeve retracts and pulls the upper end of the fixing rod to rotate towards the side wall of the caisson, so that the working port of the water blocking box rotates towards the side wall of the caisson until the working port is sealed on the maintenance side wall of the caisson, and then the fastening assembly is installed to fix the water blocking box to the side wall of the caisson.

[0022] The advantages of this invention include: by setting up a walking device and a connecting device, the existing fixed-installation water-blocking box is set as a movable structure. After the side wall of the caisson is repaired, the water-blocking box can be moved directly in the water without the need to completely dismantle, hoist, and reposition the fixed device. This simplifies the construction steps of moving the water-blocking box between construction points, improves the efficiency of transfer and installation, and avoids the trouble of using large hoisting equipment to transfer the entire water-blocking sealing device. It has very high practicality and application prospects for the continuous repair of wharf caissons. Attached Figure Description

[0023] Figure 1 This is a top view of the structure of an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A schematic diagram of the AA section structure.

[0025] Figure 3 yes Figure 1 A schematic diagram of the BB section structure.

[0026] Figure 4 yes Figure 1 A schematic diagram of the CC section structure.

[0027] Figure 5 This is a side view structural diagram of an embodiment of the present invention.

[0028] Figure 6 yes Figure 5 A magnified structural diagram at point D in the diagram.

[0029] Figure 7 yes Figure 5 A schematic diagram of the structure after the diagonal brace extends from the perspective.

[0030] Figure 8 yes Figure 7 A magnified structural diagram at point E in the diagram.

[0031] In the accompanying drawings, the same parts are labeled with the same reference numerals; the drawings are not drawn to scale. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Example

[0034] A continuous-operation water-blocking and sealing device includes a water-blocking tank 2 with an upper opening. An operating port 3 is provided on the side wall of the water-blocking tank 2. A water-blocking sealing part is provided at the operating port 3, sealing the water-blocking tank 2 against the side wall of a caisson 1. The structure and sealing method of the water-blocking sealing part are the same as those in the invention patent with publication number CN110747804B. Several sets of fastening components 4 are provided on the water-blocking tank 2, fixing the water-blocking tank 2 to the caisson 1. Each fastening component 4 includes a second pressure plate 41 and a second pressure screw 42. The second pressure plate 41 is detachably fixed to the upper side wall of the operating port 3 by bolts, and extends downwards to the outer side of the inner side wall of the caisson 1. The second pressure screw 42 is connected to the lower end of the second pressure plate 41, and its end is used to press against the inner side wall of the caisson 1.

[0035] A walking device is provided on the upper surface of the caisson 1. The walking device can move along the length of the caisson 1. A telescopic connecting component is installed on the walking device. The connecting component extends outward from the side wall of the caisson 1 and is fixedly connected to the water-blocking box 2. When the connecting component extends, it can detach the water-blocking box 2 from the side wall of the caisson 1. After the maintenance of the construction point on the side wall of the caisson 1 is completed, the fastening component 4 is removed, the connecting component is extended, and the water-blocking box 2 is detached from the side wall of the caisson 1, so that the working port 3 is separated from the side wall of the caisson 1. Seawater is poured into the water-blocking box 2 through the working port 3. After the seawater is full, the connecting component suspends the water-blocking box 2 and moves it along the side wall of the caisson 1 to the next maintenance construction point.

[0036] Specifically, the walking device includes a frame 51, which is rectangular in shape and assembled by welding steel sections. The frame 51 includes a crossbeam 511 located above the side wall of the caisson 1 away from the water-blocking tank 2. The connecting assembly is fixedly installed on the crossbeam 511. Rollers 52 are installed at the lower ends of the four corners of the frame 51. The rollers 52 press against the upper surfaces of the two side walls of the caisson 1. Limiting rings 521 are provided on the outer side surfaces of the rollers 52 facing the outer side walls. The limiting rings 521 can play a guiding and limiting role, so that the rollers 52 only travel along the side walls of the caisson 1. In addition, in order to prevent the water-blocking tank from tipping over during movement and to ensure the stability of the entire device during movement, a counterweight can be placed on the frame to increase the gravity of the walking device.

[0037] To improve the stability of the walking device during maintenance and construction, the four rollers 52 are fixed to the upper end of the side wall of the caisson 1. The specific structure includes: an inverted U-shaped fixing plate 53 is fitted on the mounting shaft at the upper end of the rollers 52, and the two ends of the fixing plate 53 are bent outward vertically to form ear plates 531. The ear plates 531 are attached to the upper end of the side wall of the caisson 1 and anchored with bolts; on the side wall of the caisson 1 away from the water blocking box 2, two of the rollers 52 have a pressing plate 54 extending downward at one end of the two rollers 52 on the outer side wall, and a pressing screw 55 is installed on the pressing plate 54 and its end is used to press against the side wall of the caisson 1. After the fixing plate 53 is anchored with bolts, the roller 52 is fixed on the caisson 1 to prevent the roller 52 from shifting during construction, thereby improving the stability and safety of the water blocking box 2 during construction. At the same time, the installation structure of the clamping plate 54 and the clamping screw 55 is adopted. The water blocking box 2 is located on one side of the walking device. Therefore, the installation structure of the clamping plate 54 and the clamping screw 55 set on the opposite side of the water blocking box 2 can play a role in stabilizing the water blocking box 2.

[0038] The movement of the walking device can be driven by an external winch or by a drive unit installed on the walking device. In order to achieve integration and simplify the construction steps, this invention adopts the method of installing a drive unit on the walking device. Specifically, a motor reducer 56 is installed on the upper end of the two rollers 52 above the side wall of the caisson 1 where the water blocking box 2 is installed. The motor reducer 56 and the corresponding lower rollers 52 are connected by a conveyor belt. The two motor reducers 56 start and stop synchronously.

[0039] Furthermore, the connecting assembly includes a fixed base 61, a diagonal brace 62, and an upright 63. The fixed base 61 is fixed to the crossbeam 511, and the upright 63 is fixed above the side of the water-blocking tank 2 facing the side wall of the sinkhole 1, with the upright 63 extending upwards. The diagonal brace 62 includes a core rod 621 and a telescopic sleeve rod 622 fitted onto the core rod 621. The end of the core rod 621 is hinged to the fixed base 61, and the end of the sleeve rod 622 is hinged to the upper end of the upright 63. A hydraulically operated device is installed at the connection between the core rod 621 and the sleeve rod 622. The hydraulic jack 64 has its base fixed to the outer wall of the core rod 621, and its telescopic shaft end fixed to the outer wall of the sleeve rod 622. A support member 65 is provided below the sleeve rod 622. The support member 65 includes an arc-shaped support plate 651 and a tripod 652. The tripod 652 is mounted on the frame 51, and the arc-shaped support plate 651 is mounted on the upper end of the tripod 652. The sleeve rod 622 is supported on the arc-shaped support plate 651, and the central axis of the arc-shaped support plate 651 is parallel to the central axis of the sleeve rod 622. The diagonal brace 62 is designed to be telescopic. When the hydraulic jack 64 extends, the diagonal brace 62 also extends. Since the sleeve 622 is supported on the arc-shaped support plate 651, the arc-shaped support plate 651 plays a supporting and positioning role. When the diagonal brace 62 extends at an angle, it can push the water blocking box 2 towards the seawater side. Therefore, it can peel the water blocking box 2 off the side wall of the caisson 1, so that the water blocking box 2 avoids the side wall of the caisson 1 from causing wear to the water blocking seal around the working port when it moves.

[0040] An auxiliary walking assembly 7 is installed on the lower bottom surface of the water-blocking tank 2. The auxiliary walking assembly 7 includes a mounting base 71 and a walking wheel 72. The axle of the walking wheel 72 is vertically arranged, and the wheel surface of the walking wheel 72 is close to the maintenance side wall of the caisson 1. When the diagonal brace 62 extends, since the hinge point between the diagonal brace 62 and the upright 63 is at the upper end of the side of the water-blocking tank 2 facing the side wall of the caisson 1, the water-blocking tank 2 rotates and tilts under its own weight, causing the lower end of the working port 3 to first rest against the side wall of the caisson 1, thus separating the working port 3. Then the diagonal brace 62 continues to rotate until the walking wheel 72 presses against the side wall of the caisson 1, and the working port 3 is completely separated from the side wall of the caisson 1. When the water-blocking tank 2 is moved in the water, the working port 3 does not contact the side wall of the caisson 1 throughout the entire process, avoiding wear on the sealing components at the working port 3.

[0041] Furthermore, due to the large size of the water-blocking box 2, two sets of connecting components are provided in this invention, located at the left and right ends of the water-blocking box 2 respectively. This invention also provides a support component 8 with the same structure as the invention patent with publication number CN110747804B. The difference is that, since the two sets of connecting components also have the function of stabilizing the water-blocking box 2 during construction, two sets of support components 8 are used in this invention. The two sets of support components 8 are located at the three equal division points in the left and right directions of the water-blocking box 2, and the ends of the support components 8 are fixedly installed on the crossbeam 511 by bolts. When moving the water-blocking box 2, the fixed connection between the support components 8 and the crossbeam 511 needs to be temporarily removed.

[0042] The present invention also provides a method of using a continuously operating water-blocking sealing device, comprising the following steps:

[0043] Step S1: First, hoist the walking device and place it on the upper surface of the caisson 1. It is necessary to simultaneously clamp the four rollers 52 on the upper surface of the side wall of the caisson 1. Then, hoist the water blocking box 2 so that the working opening 3 is close to the maintenance side wall of the caisson 1 and lower it. After the water blocking box 2 is lowered, install the fastening component 4 to fix and seal the water blocking box 2 to the maintenance side wall of the caisson 1. Finally, install the connecting component and the support component 8, and then drain the water in the water blocking box 2. The maintenance personnel can carry out maintenance work inside the water blocking sealing device.

[0044] Step S2: After the maintenance work is completed, remove the bolts on the fixing plate 53 at the fastening component 4 and roller 52, and then disassemble the support component 8; then, the hydraulic jack 64 extends, and the sleeve rod 622 extends to push the upper end of the fixing rod to rotate towards the seawater side. During the extension of the sleeve rod 622, the entire water blocking box 2 first rotates around the lower edge of the working port 3 as the pivot. When the water blocking box rotates to the point where the traveling wheel 72 presses on the maintenance side wall of the caisson 1, the working port 3 is completely separated from the maintenance side wall of the caisson 1. At this time, the working port 3 of the water blocking box 2 is peeled off from the side wall of the caisson 1. After the water blocking box 2 is peeled off, only the traveling wheel 72 presses on the maintenance side wall of the caisson 1, and seawater flows into the water blocking box 2 from the working port 3.

[0045] Step S3: After the water blocking tank 2 is filled with seawater, start the walking device to move along the side wall of the caisson 1 and stop after reaching the next maintenance construction point.

[0046] Step S4: After the walking device stops, use bolts to anchor the fixing plate 53 at roller 52 to the upper end face of the side wall of the caisson 1. After installing the fastening component 4 and the support component 8, the hydraulic jack 64 retracts, and the sleeve rod 622 retracts, pulling the upper end of the fixing rod to rotate towards the side wall of the caisson 1, so that the working port 3 of the water blocking box 2 rotates towards the side wall of the caisson 1 until the working port 3 is sealed on the maintenance side wall of the caisson 1. Then, install the fastening component 4 and the support component 8 to fix the water blocking box 2 to the side wall of the caisson 1.

[0047] Step S5: After the water-blocking sealing device is fixedly installed, drain the water from the water-blocking tank 2, and maintenance personnel enter the water-blocking tank 2 to carry out maintenance work.

[0048] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0049] The present invention has been described above with reference to preferred embodiments, but the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications can be made to the present invention, and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A method of using a continuously operating water-blocking sealing device, characterized in that, The steps are as follows: Step S1: Install a water-blocking sealing device at the caisson (1), and maintenance personnel perform maintenance work inside the water-blocking sealing device; the water-blocking sealing device includes a water-blocking box with an opening at the top, an operating port on the side wall of the water-blocking box, a water-blocking sealing part at the operating port, the water-blocking sealing part sealing the water-blocking box on the side wall of the caisson, a fastening component on the water-blocking box, the fastening component fixing the water-blocking box to the caisson; a walking device is provided on the upper surface of the caisson, a telescopic connecting component is installed on the walking device, the connecting component extends outward to the side wall of the caisson and is fixedly connected to the water-blocking box, the walking device drives the water-blocking box to move along the length direction of the caisson, and when the connecting component extends, it can peel the water-blocking box off the side wall of the caisson; Step S2: After the maintenance work is completed, first remove the part of the water-blocking sealing device that is fixed to the caisson (1), then extend the connecting assembly and peel the working port (3) of the water-blocking box (2) from the side wall of the caisson (1). After the water-blocking box (2) is peeled off, only the traveling wheel (72) presses on the maintenance side wall of the caisson (1), and seawater is poured into the water-blocking box (2) from the working port (3). The traveling device includes a frame and rollers set on the lower end face of the four corners of the frame. The frame includes a crossbeam located above the side wall of the caisson away from the water-blocking box. The connecting assembly is fixedly installed on the crossbeam. The connecting assembly includes a fixed seat, a diagonal brace and a vertical pole. The fixed seat is fixed on the crossbeam and the vertical pole is fixed on the water-blocking box facing the caisson. Above the side of the side wall, and the upright extends upward; the diagonal brace includes a core rod and a telescopic sleeve rod sleeved on the core rod, the end of the core rod is hinged to the fixed base, the end of the sleeve rod is hinged to the upper end of the upright rod, a hydraulic jack is installed at the connection between the core rod and the sleeve rod, the base of the hydraulic jack is fixed to the outer wall of the core rod, the telescopic shaft end of the hydraulic jack is fixed to the outer wall of the sleeve rod, a support member is provided below the sleeve rod, the support member includes an arc-shaped support plate and a tripod, the tripod is installed on the frame, the arc-shaped support plate is installed on the upper end of the tripod, and the sleeve rod is supported on the arc-shaped support plate, and the central axis of the arc-shaped support plate is parallel to the central axis of the sleeve rod; Step S3: After the water blocking tank (2) is filled with seawater, the walking device is started and moves along the side wall of the caisson (1) and stops after reaching the next maintenance construction point; the rollers of the walking device are pressed on the upper end surface of the two side walls of the caisson, and limit rings are provided on the end surface of the rollers facing the outer side wall; an inverted U-shaped fixing plate is fitted on the mounting shaft at the upper end of the roller, and the two ends of the fixing plate are bent outward vertically to form ear plates. The ear plates are attached to the upper end surface of the side wall of the caisson and anchored with bolts; two rollers on the side wall of the caisson away from the water blocking tank have a pressing plate installed at the end of the two rollers located on the outer side wall, and a pressing screw is installed on the pressing plate and the end is used to press against the side wall of the caisson; a motor reducer is installed on the upper end of the two rollers above the side wall of the caisson where the water blocking tank is installed, and the motor reducer is connected to the corresponding lower roller through a conveyor belt. The two motor reducers start and stop synchronously. Step S4: After stopping, the walking device is fixed on the upper surface of the caisson (1), and then the connecting assembly is retracted so that the working port (3) of the water blocking box (2) is resealed on the side wall of the caisson (1), and the water blocking sealing device is reinstalled and fixed to the part of the caisson (1). Step S5: After the water-blocking sealing device is fixedly installed, drain the water from the water-blocking tank (2) and the maintenance personnel enter the water-blocking tank (2) to carry out maintenance work.

2. The method of using the continuous-operation water-blocking sealing device according to claim 1, characterized in that: In step S1, installing the water-blocking sealing device at the caisson (1) specifically includes: first, hoisting the walking device to the upper surface of the caisson (1), then hoisting the water-blocking box (2) so that the working opening (3) is lowered against the maintenance side wall of the caisson (1), after the water-blocking box (2) is lowered, installing the fastening component (4) to fix and seal the water-blocking box (2) to the maintenance side wall of the caisson (1), finally installing the connecting component, and then draining the water in the water-blocking box (2).

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