CN114737491A - Prestressed concrete bridge body maintenance equipment and method - Google Patents

Abstract

The invention belongs to the technical field of bridge maintenance, and particularly relates to prestressed concrete bridge body maintenance equipment and a method, which comprises a protective cover, a high-pressure spray head and a recovery unit, wherein the recovery unit comprises a sliding plate, an arc-shaped plate and an annular pipe, the inner side of the arc-shaped curved surface of the arc-shaped plate is fixedly connected with a blocking plate, and the bottom and the upper end of the annular pipe are respectively fixedly connected with a first filter screen and a second filter screen; when the high-pressure sprayer is used for crushing the concrete floor, personnel synchronously open the water pump, the water pump is an existing device and is arranged on the high-pressure hydraulic breaker, the annular pipe is fixedly connected to the bottom of the inner side of the arc-shaped plate, the guide pipe is communicated between the water discharge pipe and the annular pipe, and meanwhile water on the inner side of the arc-shaped plate enters the annular pipe through the first filter screen and the second filter screen on the annular pipe, so that when the water pump pumps water, the water in the annular pipe can be pumped away by the water pump through the water discharge pipe and the guide pipe, and waste of water resources is reduced.

Description

Prestressed concrete bridge body maintenance equipment and method

Technical Field

The invention belongs to the technical field of bridge maintenance, and particularly relates to prestressed concrete bridge body maintenance equipment and a prestressed concrete bridge body maintenance method.

Background

The bridge is an important carrier of current transportation, is mainly built by concrete materials, is generally erected on rivers, lakes and seas, and enables vehicles, pedestrians and other structures to pass smoothly, wherein the prestressed concrete bridge utilizes the counter force of the pretension of steel bars or steel wires (cables) to enable the concrete to be pre-pressed before loading, has the advantages of saving steel materials, reducing the material cost of the bridge and the like, the road surface of the bridge is washed by rainwater for a long time at present, and the durability of the bridge is seriously influenced in the past due to the fact that the concrete protective layer on the road surface is damaged by sulfate in the rainwater, so that the bridge needs to be periodically maintained, and the service life of the bridge is prolonged.

The existing bridge maintenance equipment mainly comprises a bridge detection vehicle, a concrete jet pump, a high-pressure hydraulic breaker and the like, wherein the high-pressure hydraulic breaker mainly takes water as a working medium, forms a high-speed jet beam through a supercharging device and a nozzle with a specific shape to generate huge striking energy so as to break cement concrete, thereby facilitating subsequent pavement repair, the high-pressure hydraulic breaker has low noise relative to the existing drilling machine, the concrete is an inhomogeneous porous material, and steel is a homogeneous material, so that the concrete is broken by using the high-pressure hydraulic breaker, the jetted water flow can only break the concrete without damaging internal reinforcing steel bars, the reinforcing steel bars can be damaged when the existing drilling machine is improperly used, and the high-pressure hydraulic breaker can effectively protect the foundation structure of a prestressed bridge;

but the high-pressure rivers that present high-pressure hydraulic power abolishes the machine and erupts after broken to the concrete, and existing equipment can't retrieve the water that erupts, leads to water to pass on the road surface, causes the water waste more, is unfavorable for the protection of water resource.

In view of the above, the present invention provides a prestressed concrete bridge maintenance apparatus and method to solve the above technical problems.

Disclosure of Invention

The invention provides prestressed concrete bridge body maintenance equipment and method, aiming at making up for the defects of the prior art and solving the problems that water flow jetted by the existing high-pressure hydraulic breaker cannot be recovered, so that more water resource waste is caused, and the like.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention relates to a prestressed concrete bridge body maintenance device, which comprises:

the protective cover is used for preventing high-pressure water flow from flying around after being rebounded when touching the ground;

the high-pressure spray head is fixedly connected to the axis of the protective cover;

the recovery unit is arranged on the inner side of the protective cover and used for recovering high-pressure water flow impacting the ground.

Preferably, the recovery unit comprises:

the upper end of the sliding plate is connected in the bottom inner cavity of the protective cover in a sliding mode;

the reset spring is fixedly connected to the inner side of the bottom of the protective cover and is positioned above the sliding plate;

the ball is rotationally connected to the bottom of the sliding plate;

the arc-shaped plate is connected with the bottom of the protective cover in a sliding mode.

Preferably, the upper end of the sliding plate is provided with a matching groove, and the sliding plate can be clamped with the bottom inner side cavity of the protective cover by using the matching groove.

Preferably, the bottom of the protective cover is fixedly connected with a rib;

the arc plate and rib sliding connection department has seted up the mounting groove, the mounting groove sliding connection of rib and arc.

Preferably, the inner side of the arc-shaped curved surface of the arc-shaped plate is fixedly connected with a blocking plate, and the blocking plate is arc-shaped and is bent downwards.

Preferably, the bottom of arc just is located the below of baffler has linked firmly the annular tube, the bottom of annular tube has linked firmly first filter screen.

Preferably, the upper end of the annular pipe is fixedly connected with a second filter screen, and the second filter screen is in a convex state.

Preferably, the upper left corner of the protective cover is fixedly connected with a drain pipe, and the lower end of the drain pipe is communicated with a conduit;

the inside of drain pipe is connected with the filter pulp firmly.

Preferably, the lower end of the conduit is in communication with the annular tube.

A prestressed concrete bridge body maintenance method is applicable to any one of the bridge maintenance devices, and comprises the following processes:

s1: firstly, fixedly connecting a protective cover with a high-pressure sprayer through a bolt, communicating the high-pressure sprayer with water pressure boosting equipment, and then operating a high-pressure hydraulic breaker by personnel to move the high-pressure sprayer to an appointed position;

s2: then, pressurizing the water by operating equipment by personnel, so that the high-pressure spray head sprays high-pressure water flow to crush the concrete on the ground of the bridge;

s3: in the concrete crushing process, the water flow can bounce to the inside of the protective cover due to the reaction force of the ground water supply flow, then flows to the arc-shaped plate along the inner wall of the protective cover under the action of gravity and starts to accumulate;

s4: an external water pump is connected with a water discharge pipe through a pipeline, then the water pump pumps water in the arc-shaped plate away through a ring pipe by using suction force, the water is purified and then discharged into water pressure supercharging equipment, and high-pressure water flow is formed again to crush concrete;

s5: after the concrete is crushed, the personnel clean the concrete broken slag, and lay new concrete mortar on the ground again to finish the maintenance of the bridge ground.

The invention has the following beneficial effects:

1. according to the maintenance equipment and method for the prestressed concrete bridge body, when the high-pressure hydraulic breaker works in a narrow space, the high-pressure hydraulic breaker drives the high-pressure spray head to extend into the narrow space through the mechanical arm of the high-pressure hydraulic breaker, so that the blocking of the periphery of the space exerts a reaction force on the sliding plate, the sliding plate slides towards the inner side of the protective cover and extrudes the reset spring, the narrow space is adapted to, the protection effect can be continuously achieved, concrete fragments are prevented from scattering around, meanwhile, the sliding plates are mutually independent, when the sliding plates meet the uneven ground, the sliding plates at the protruding positions can be contracted, the high-pressure spray head can be in a stable and difficult-to-shake state, and the crushing effect of concrete is guaranteed.

2. According to the prestressed concrete bridge body maintenance equipment and method, firstly, a water pump is connected with a water discharge pipe through a pipeline by a person, then when a high-pressure spray head breaks a concrete floor, the person synchronously opens the water pump, the water pump is an existing device and is installed on a high-pressure hydraulic breaker, because the annular pipe is fixedly connected to the bottom of the inner side of an arc-shaped plate, a guide pipe is communicated between the water discharge pipe and the annular pipe, and meanwhile, water on the inner side of the arc-shaped plate enters the annular pipe through a first filter screen and a second filter screen on the annular pipe, when the water pump pumps water, the water in the annular pipe can be pumped away by the water pump through the water discharge pipe and the guide pipe and is purified by special equipment and then reused, so that waste of water resources is reduced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a flow chart of the method of the present invention;

FIG. 2 is a perspective view of the device of the present invention;

FIG. 3 is a front view of the shield of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a perspective view of the slide plate of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at B;

fig. 7 is a schematic view of the connection between the shield and the baffle according to the present invention.

In the figure: 1. a protective cover; 11. ribs; 2. a high pressure spray head; 3. a drain pipe; 31. filtering cotton; 32. a conduit; 4. a recovery unit; 41. a sliding plate; 411. a mating groove; 42. a return spring; 43. a ball bearing; 5. an arc-shaped plate; 51. a barrier plate; 52. an annular tube; 521. a first filter screen; 522. a second filter screen; 53. and (4) mounting the groove.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The embodiment of the invention provides prestressed concrete bridge body maintenance equipment and method, and solves the technical problems that water resources are wasted more and the like because water flow jetted by the existing high-pressure hydraulic breaker cannot be recovered;

in order to solve the technical problems, the technical scheme in the embodiment of the invention has the following general idea: after the high-pressure water flow is jetted out through the high-pressure nozzle 2 to crush the concrete, the high-pressure water flow is scattered by rebounding reaction force on the ground, then the protective cover 1 is matched with the sliding plate 4 to prevent the water flow from scattering everywhere, so that a large amount of water flow is accumulated on the arc-shaped plate 5, the water flow is prevented from scattering everywhere and is difficult to collect, then the accumulated water is primarily filtered by using the first filter screen 521 and the second filter screen 522, and secondary filtration of the filter cotton 31 is performed, so that concrete fragments in the water flow can be greatly reduced, water on the inner side of the arc-shaped plate 5 is pumped away by using the water pump, the water of the high-pressure nozzle 2 is recycled and reused, and waste of water resources is reduced;

in order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

As shown in fig. 1 to 7, an embodiment of the present invention provides a prestressed concrete bridge maintenance apparatus, including:

the protective cover 1 is used for preventing high-pressure water flow from colliding with the ground and flying around after rebounding;

the high-pressure spray head 2 is fixedly connected to the axis of the protective cover 1;

and the recovery unit 4 is arranged on the inner side of the protective cover 1, and the recovery unit 4 is used for recovering the high-pressure water flow impacting the ground.

In the embodiment, when a bridge pavement is damaged and needs to be maintained, firstly, a worker carries the high-pressure hydraulic breaking and maintaining equipment to a specified position to prepare for breaking concrete on the ground, so that the worker can lay a new layer of concrete on the ground, then the worker fixedly connects the protective cover 1 and the high-pressure spray nozzle 2 through bolts and communicates the high-pressure spray nozzle 2 with the hydraulic pressurization equipment in the high-pressure hydraulic breaker, and after the high-pressure hydraulic breaker breaks the concrete pavement, the protective cover 1 and the high-pressure spray nozzle 2 can be separated, so that the protective cover 1 and the high-pressure spray nozzle 2 can be conveniently stored, and the occupied area can be reduced;

then personnel control high-pressure water conservancy breaker through high-pressure water conservancy breaker operating system, make high pressure nozzle 2 spout high-pressure rivers, begin to carry out the breakage to the subaerial concrete of bridge, high-pressure rivers impact ground after, part rivers can be by the inboard that the reaction force rebound of ground flows to protection casing 1, then recovery unit 4 can retrieve the rivers of bounce-back, thereby the waste of water resource has been reduced, protection casing 1 can block the concrete piece in the rivers, it causes subsequent clearance comparatively trouble to prevent that the piece in the rivers from scattering everywhere.

As shown in fig. 4 to 6, the recovery unit 4 includes:

a sliding plate 41, the upper end of the sliding plate 41 is connected in the bottom inner cavity of the protective cover 1 in a sliding way;

the return spring 42 is fixedly connected to the inner side of the bottom of the protective cover 1 and is positioned above the sliding plate 41;

the ball 43, the said ball 43 is connected to the bottom of the said sliding plate 41 rotatably;

an arc-shaped plate 5, wherein the arc-shaped plate 5 is connected with the bottom of the protective cover 1 in a sliding way

The upper end of the sliding plate 41 is opened with a fitting groove 411, and the sliding plate 41 can be engaged with the bottom inner cavity of the shield 1 by the fitting groove 411.

Furthermore, when the high-pressure nozzle 2 crushes the ground concrete, the protective cover 1 can be placed on the ground, so that the end part of the high-pressure nozzle 2 is completely positioned inside the protective cover 1, when the high-pressure nozzle 2 crushes the ground concrete, the bottom of the sliding plate 41 is placed on the ground, and the high-pressure nozzle 2 is completely wrapped inside the protective cover, so that after the high-pressure nozzle 2 crushes the concrete, concrete scraps and water flow cannot scatter out under the blocking of the sliding plate 41 and the protective cover 1, the recovery unit 4 can recover the sprayed water in a limited space formed by the sliding plate 41 and the protective cover 1, the recovery effect and efficiency of the water are improved, and the influence of the water flow carrying a large amount of concrete scraps to surrounding workers is prevented from scattering all around;

meanwhile, the position of the ground where the concrete needs to be crushed is generally more than one, so that a person is required to operate the high-pressure hydraulic breaker to operate, the high-pressure hydraulic breaker drives the high-pressure spray head 2 to move through a mechanical arm of the high-pressure hydraulic breaker, and the ball 43 is rotatably connected to the bottom of the sliding plate 41, so that the high-pressure spray head 2 can directly slide on the ground without being lifted, the number of times that the high-pressure spray head 2 needs to be lifted is reduced, and the crushing efficiency of the concrete is improved, wherein the sliding plate 41 can provide a certain supporting force for the high-pressure spray head 2, and the ball 43 can reduce the friction force between the bottom of the sliding plate 41 and the ground, so that the sliding plate 41 can slide on the ground more easily and more labor-saving;

meanwhile, the high-pressure hydraulic breaker is also suitable for operation in a narrow space, when the high-pressure hydraulic breaker operates in the narrow space, the high-pressure hydraulic breaker drives the high-pressure spray head 2 to extend into the narrow space through a mechanical arm of the high-pressure hydraulic breaker, so that the blocking around the space applies a reaction force to the sliding plate 41, as the sliding plate 41 is clamped with the bottom inner side cavity of the protective cover 1 by the matching groove 411, the sliding plate 41 is not easy to fall off, the sliding plate 41 can freely slide in the inner side cavity of the protective cover 1, so that the sliding plate 41 slides towards the inner side of the protective cover 1 and extrudes the return spring 42, the narrow space is adapted to, the concrete fragments are prevented from scattering around, when the high-pressure spray head 2 leaves the narrow space, the return spring 42 releases pressure to drive the sliding plate 41 to reset, and simultaneously, each sliding plate 41 is independent, when encountering uneven ground, the sliding plate 41 at the protruding position can be contracted, thereby ensuring that the high-pressure nozzle 2 can be in a stable and uneasy-to-shake state and ensuring the concrete crushing effect.

As shown in fig. 4 and 6, the bottom of the protective cover 1 is fixedly connected with ribs 11;

the sliding connection part of the arc-shaped plate 5 and the rib 11 is provided with a mounting groove 53, and the rib 11 is in sliding connection with the mounting groove 53 of the arc-shaped plate 5;

the inner side of the arc curved surface of the arc plate 5 is fixedly connected with a blocking plate 51, and the blocking plate 51 is arc-shaped and bends downwards.

Further, rivers that high pressure nozzle 2 jetted out are broken the back with the concrete, rivers can receive the reaction force on ground and the bounce flies apart, this moment because the blocking of sliding plate 41 and protection casing 1, so water can fall on the inner wall of sliding plate 41 and protection casing 1, rivers flow to the arc 5 in the recovery unit 4 on the action of gravity on rivers that are rebounded on ground and the protection casing 1 inner wall, then gather on arc 5 step by step, because high pressure nozzle 2 need drive protection casing 1 and remove, so that carry out the concrete breakage on the subaerial of difference, when the inboard baffler 51 of arc 5 can prevent to gather a large amount of water on the arc 5, the condition that 5 inboard rivers of arc spill over easily, lead to the water recovery effect after the injection not good.

As shown in fig. 6, a ring-shaped pipe 52 is fixedly connected to the bottom of the arc-shaped plate 5 and below the blocking plate 51, and a first filter screen 521 is fixedly connected to the bottom of the ring-shaped pipe 52;

the upper end of the annular pipe 52 is fixedly connected with a second filter screen 522, and the second filter screen 522 is in a convex state;

the left upper corner of the protective cover 1 is fixedly connected with a drain pipe 3, and the lower end of the drain pipe 3 is communicated with a conduit 32;

the inside of the drain pipe 3 is fixedly connected with a filter cotton 31;

the lower end of the conduit 32 communicates with the annular tube 52.

Further, before the high-pressure sprayer 2 crushes concrete on the ground of the bridge, a person firstly connects the water pump with the water discharge pipe 3 through a pipeline, then when the high-pressure sprayer 2 crushes the concrete ground, the person synchronously opens the water pump, the water pump is an existing device and is installed on the high-pressure hydraulic power breaker, because the annular pipe 52 is fixedly connected to the bottom of the inner side of the arc-shaped plate 5, the conduit 32 is communicated between the water discharge pipe 3 and the annular pipe 52, and meanwhile, water on the inner side of the arc-shaped plate 5 enters the annular pipe 52 through the first filter screen 521 and the second filter screen 522 on the annular pipe 52, when the water pump pumps water, the water in the annular pipe 52 can be pumped away by the water pump through the water discharge pipe 3 and the conduit 32 and purified by special equipment for reuse, so that waste of water resources is reduced;

when the water pump pumps water, the concrete debris in the water flow inside the arc-shaped plate 5 is blocked by the first filter screen 521 and the second filter screen 522, so that a large amount of debris is prevented from entering a pipeline and affecting the service life of the water pump, meanwhile, the second filter screen 522 is in a convex state, so that the concrete debris is not easy to accumulate on the surface of the second filter screen 522, and if the second filter screen 522 is in a flat or concave state, the concrete debris is easier to accumulate relative to the second filter screen 522 in the convex state, so that the second filter screen 522 is easy to block;

meanwhile, before water in the water discharge pipe 3 enters a water pump pipeline, secondary filtration is carried out through the filter cotton 31, so that the quantity of concrete fragments in the water is further reduced, the subsequent purification process of recovered water is reduced, the water can quickly enter the high-pressure nozzle 2 to crush the concrete again after being recovered, and meanwhile, the secondary filtration of the filter cotton 31 can avoid purchasing special purification equipment with higher specifications, so that the maintenance cost of the bridge is indirectly reduced;

after ground concrete is crushed, a person detaches the high-pressure spray head 2 from the protective cover 1, and the arc plate 5 is in clearance fit with the ribs 11 at the bottom of the protective cover 1 through the mounting groove 53, so that the person can pull the arc plate 5 at the inner side of the protective cover 1 and clean the inner side of the arc plate 5, and the situation that excessive concrete fragments remain in the arc plate 5 and the water recovery efficiency is low due to more concrete fragments when water is subsequently recovered is avoided;

when realizing personnel to bridge ground maintenance through above-mentioned equipment, use high-pressure water power to abolish the waste that can the at utmost reduce the water resource.

A prestressed concrete bridge body maintenance method is applicable to any one of the bridge maintenance devices, and comprises the following processes:

s1: firstly, fixedly connecting a protective cover 1 and a high-pressure spray head 2 through bolts, communicating the high-pressure spray head 2 with water pressure boosting equipment, and then operating a high-pressure hydraulic breaker by personnel to move the high-pressure spray head 2 to an appointed position;

s2: then, the personnel operating equipment pressurizes the water, so that the high-pressure spray head 2 sprays high-pressure water flow to crush the concrete on the ground of the bridge;

s3: in the concrete crushing process, the water flow can bounce back to the inside of the protective cover 1 due to the reaction force of the ground water supply flow, then flows onto the arc-shaped plate 5 along the inner wall of the protective cover 1 under the action of gravity and starts to accumulate;

s4: an external water pump is connected with the water discharge pipe 3 through a pipeline, then the water pump 3 pumps water in the arc-shaped plate 5 away through the annular pipe 52 by means of suction, the water is discharged into the water pressure boosting equipment after being purified, and high-pressure water flow is formed again to crush the concrete;

s5: after the concrete is crushed, the personnel clean the concrete broken slag, and lay new concrete mortar on the ground again to finish the maintenance of the bridge ground.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a prestressed concrete bridge body curing equipment which characterized in that includes:

the protective cover (1) is used for preventing high-pressure water flow from flying around after colliding with the ground and rebounding;

the high-pressure spray head (2) is fixedly connected to the axis of the protective cover (1);

the recovery unit (4), recovery unit (4) set up the inboard of protection casing (1), recovery unit (4) are used for retrieving the high-pressure rivers after assaulting ground.

2. The prestressed concrete bridge body maintaining apparatus according to claim 1, wherein: the recovery unit (4) comprises:

the upper end of the sliding plate (41) is connected in a cavity at the inner side of the bottom of the protective cover (1) in a sliding way;

the return spring (42), the return spring (42) is fixedly connected to the inner side of the bottom of the protective cover (1) and is positioned above the sliding plate (41);

the ball (43), the said ball (43) is connected to the bottom of the said sliding plate (41) rotatably;

the protective cover comprises an arc-shaped plate (5), wherein the arc-shaped plate (5) is connected with the bottom of the protective cover (1) in a sliding mode.

3. The maintenance equipment of a prestressed concrete bridge body according to claim 2, characterized in that: the upper end of the sliding plate (41) is provided with a matching groove (411), and the sliding plate (41) can be clamped with the bottom inner side cavity of the protective cover (1) by utilizing the matching groove (411).

4. The prestressed concrete bridge body maintaining apparatus according to claim 1, wherein: the bottom of the protective cover (1) is fixedly connected with ribs (11);

the mounting groove (53) is formed in the sliding connection position of the arc-shaped plate (5) and the rib (11), and the rib (11) is connected with the mounting groove (53) of the arc-shaped plate (5) in a sliding mode.

5. The prestressed concrete bridge body maintaining apparatus according to claim 4, wherein: the arc curved surface inboard of arc (5) has linked firmly baffler (51), baffler (51) are the arc and crooked downwards.

6. The prestressed concrete bridge body maintaining apparatus according to claim 5, wherein: the bottom of arc (5) just is located the below of baffler (51) has linked firmly annular pipe (52), the bottom of annular pipe (52) has linked firmly first filter screen (521).

7. The prestressed concrete bridge body maintaining apparatus according to claim 6, wherein: the upper end of the annular pipe (52) is fixedly connected with a second filter screen (522), and the second filter screen (522) is in a convex state.

8. The prestressed concrete bridge body maintaining apparatus according to claim 5, wherein: the left upper corner of the protective cover (1) is fixedly connected with a drain pipe (3), and the lower end of the drain pipe (3) is communicated with a conduit (32);

the inside of the drain pipe (3) is fixedly connected with filter cotton (31).

9. The prestressed concrete bridge body maintaining apparatus according to claim 8, wherein: the lower end of the conduit (32) communicates with the annular tube (52).

10. A method for maintaining a prestressed concrete bridge body is characterized by comprising the following steps: the method is suitable for the bridge maintenance equipment of any one of claims 1 to 9, and comprises the following processes:

s1: firstly, fixedly connecting a protective cover (1) with a high-pressure sprayer (2) through a bolt, communicating the high-pressure sprayer (2) with water pressure boosting equipment, and then operating a high-pressure hydraulic breaker by personnel to move the high-pressure sprayer (2) to a specified position;

s2: then, the personnel operating equipment pressurizes the water, so that the high-pressure spray head (2) sprays high-pressure water flow to crush the concrete on the ground of the bridge;

s3: in the concrete crushing process, the water flow rebounds to the inside of the protective cover (1) due to the reaction force of the ground water supply flow, then flows to the arc-shaped plate (5) along the inner wall of the protective cover (1) under the action of gravity and starts to accumulate;

s4: an external water pump is connected with the water discharge pipe (3) through a pipeline, then the water pump (3) pumps water in the arc-shaped plate (5) away through a ring-shaped pipe (52) by utilizing suction force, the water is discharged into a water pressure supercharging device after being purified, and high-pressure water flow is formed again to crush concrete;

s5: after the concrete is crushed, the personnel clean the concrete broken slag, and lay new concrete mortar on the ground again to finish the maintenance of the bridge ground.

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