Construction method for protecting bridge pile foundation through slurry solidified soil

Abstract

The invention discloses a construction method for protecting a bridge pile foundation through slurry solidified soil. The construction method comprises the steps that S1, standard slurry is manufactured on land; s2, a flat barge is positioned near the bridge pile foundation, and a slurry storage pool is arranged on the flat barge; s3, the standard slurry is conveyed into the slurry storage pool; s4, a curing agent is added into the slurry storage pool and stirred, and slurry solidified soil is obtained; and S5, the slurry solidified soil is pumped into a scouring pit beside the bridge pile foundation. According to the construction method, standard slurry with large workload is manufactured and arranged on land, the overwater operation difficulty is reduced, the economic benefit is improved, the curing agent with small workload is additionally arranged on the flat barge, and due to the fact that the flat barge is close to the bridge pile foundation, the transportation time of slurry solidified soil can be shortened; therefore, the problem that the slurry solidified soil loses fluidity due to the fact that the solidifying agent is added in advance and transported for a long time is solved, and the working time of the slurry solidified soil is guaranteed.

Description

Technical Field

[0001] This invention relates to a construction method for protecting bridge pile foundations using mud-stabilized soil. Background Technology

[0002] Currently, one method involves filling scour pits with slurry-stabilized soil. This method involves preparing the slurry-stabilized soil containing a solidifying agent on land in a single step, transporting it to the construction site, and finally pumping it into the scour pit using a pressure pump. Because this method involves preparing the slurry-stabilized soil containing the solidifying agent in a single step, the slurry's fluidity is poor after prolonged transportation, resulting in ineffective filling and, in extreme cases, clogging of the delivery pipes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide a construction method for protecting bridge pile foundations using mud-stabilized soil.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A construction method for protecting bridge pile foundations using mud-stabilized soil includes the following steps:

[0006] S1. Prepare standard mud on land;

[0007] S2. Position a flat barge near the bridge pile foundation, the flat barge being equipped with a slurry storage tank;

[0008] S3. The standard mud is transported to the mud storage tank;

[0009] S4. Add a curing agent to the slurry storage tank and stir to obtain slurry-cured soil;

[0010] S5. Pump the solidified mud into the scouring pit next to the bridge pile foundation.

[0011] In this scheme, the construction method breaks down the process of making slurry-stabilized soil into two steps: standard slurry preparation and solidifier addition. The standard slurry preparation, which involves a large amount of work, is carried out on land, reducing the difficulty of water-based operations and improving economic efficiency. The solidifier addition, which involves a smaller amount of work, is carried out on a flatbed barge. Since the flatbed barge is close to the bridge pile foundation, the transportation time of the slurry-stabilized soil can be reduced. This solves the problem of the slurry-stabilized soil losing its fluidity due to the addition of solidifier in advance and long-term transportation, thus ensuring the workability of the slurry-stabilized soil. Compared with making the slurry-stabilized soil all at once on land or water, this method reduces the difficulty of water-based operations and facilitates the preparation of slurry-stabilized soil close to the construction site, reducing transportation time and improving construction efficiency.

[0012] Since standard slurry without curing agent is transported in step S3, this construction method no longer restricts the transportation time of the standard slurry. As long as slurry reserves are prepared before pumping the slurry to solidify the soil, construction can be convenient and flexible. If a slurry with added curing agent is being transported, there are strict requirements on the transportation distance and time. The transportation time must not exceed the initial setting time of the slurry-solidified soil to prevent the solidified soil from losing its fluidity during prolonged transportation, which could lead to pipe blockage during subsequent pumping.

[0013] Preferably, step S3 includes:

[0014] Step S31: Transport the standard mud to the construction site on the bridge deck using a tanker truck;

[0015] Step S32: Use a pump truck to transport the standard mud from the transport tanker to the slurry storage tank.

[0016] In this scheme, since the transport tanker trucks carry standard mud that does not contain curing agent, there is no strict restriction on the transportation time, which facilitates the advance transportation and preparation of standard mud and makes construction more flexible.

[0017] Preferably, the construction site is located directly above the bridge pile foundation to shorten the length of the pump truck's pipeline.

[0018] The pump truck provides power for transporting the pumped slurry to solidify the soil. Preferably, at least two pumps are installed on the pump truck's delivery pipeline. When one pump is working, the others serve as backups to avoid delays in construction due to the failure of a single pump, thus achieving uninterrupted construction.

[0019] Of course, in an alternative solution, standard slurry can be transported to a storage tank via pipeline.

[0020] Preferably, in step S4, the curing agent is added only after the slurry storage tank has stored a preset volume of standard slurry.

[0021] In this scheme, the solidifying agent is added only after the standard slurry of the preset volume is stored in the slurry storage tank. This allows for a larger volume of solidified slurry soil, which can be easily pumped into the flushing pit at one time to achieve a certain "initial filling volume". This greatly reduces the underwater loss rate of the solidified slurry soil and thus significantly reduces construction costs. If the solidified slurry soil is transported and pumped one truckload at a time using tank trucks, the amount of solidified slurry soil pumped each time is too small, the construction time is long, and the underwater loss rate of the solidified slurry soil is high.

[0022] Preferably, the step S5 is followed by the step:

[0023] S6. Check whether the elevation of the solidified mud in the flushing pit meets the design requirements. If yes, the construction ends; otherwise, return to step S1.

[0024] In this scheme, the filling elevation of the scour pit is determined based on the aquatic environment at the bridge pile foundation. In most cases, the scour pit does not need to be completely filled; filling it to the design required elevation is sufficient to solidify the bridge pile foundation and achieve the effect of scour prevention. Through the detection and cyclical steps in step S6, it can be ensured that the filling elevation of the scour pit meets the design requirements. Preferably, underwater sonar is used for detection in step S6. Of course, other detection equipment can also be used in other schemes.

[0025] Preferably, the slurry storage tank includes a shell and a stirring device. The shell has a receiving cavity with an opening at the top. The stirring device includes a moving trolley and a stirring head. The stirring head is located in the receiving cavity and is connected to the moving trolley. The moving trolley can drive the stirring head to move, and the stirring head can rotate under the drive of a driving mechanism.

[0026] In this solution, the slurry storage tank for making slurry-stabilized soil includes a shell and a mixing device. The mixing head of the mixing device moves within the housing cavity of the shell under the drive of a moving trolley. The mixing head rotates during the movement, thereby mixing the slurry-stabilized soil in the housing cavity, so that the standard slurry and the solidifying agent are mixed evenly, improving the slurry preparation efficiency. Furthermore, the shell can be used for both slurry preparation and storage of slurry-stabilized soil.

[0027] Preferably, the shell is a box, and the box is provided with lifting lugs to facilitate the overall hoisting of the slurry storage tank.

[0028] Preferably, the stirring device further includes guide rails, two of which are installed parallel to each other on the housing and above the opening of the housing. The two guide rails extend along the length and / or width of the slurry storage tank. The rollers of the moving trolley cooperate with the guide rails and can move along the guide rails.

[0029] In this design, guide rails are used to improve the directionality and smoothness of the moving trolley's movement. The trolley moves along the guide rails, thereby moving the mixing head, increasing the mixing area of ​​the mud and improving the mixing effect. The guide rails are installed above the opening, positioning the trolley above and away from the mud; only the mixing head below the trolley moves and mixes the mud within the receiving cavity, preventing the trolley from moving within the mud and thus protecting it.

[0030] In an alternative solution, the mobile trolley can also move in areas where no guide rails are provided.

[0031] In one alternative, the mobile trolley can move outside the container or inside the container.

[0032] Preferably, the guide rail includes a transverse guide rail and a longitudinal guide rail, and the moving trolley includes a longitudinal trolley and a transverse trolley. The two longitudinal guide rails are installed on opposite sides of the housing along the length direction of the housing, and the two longitudinal trolleys are respectively installed at both ends of the two transverse guide rails. The two transverse guide rails are movably mounted on the two longitudinal guide rails via the longitudinal trolleys, and the transverse trolleys are movably mounted on the two transverse guide rails. The stirring head is connected to the transverse trolleys.

[0033] In this design, the transverse trolley can drive the stirring head to move along the transverse guide rail, while the longitudinal trolley can drive the transverse guide rail, the transverse trolley, and the stirring head to move longitudinally. This allows the stirring head to cover any area of ​​the cavity, preventing dead zones and improving the stirring effect.

[0034] Preferably, the slurry storage tank further includes a support member located in the middle of the receiving cavity, the lower end of the support member being connected to the inner wall of the shell, and the number of the stirring devices is two sets, the two sets of stirring devices together covering the receiving cavity, and the longitudinal guide rail of each set of stirring devices being connected to the upper end of the support member.

[0035] In this design, two mixing devices can operate simultaneously, improving mixing efficiency. A support structure is installed in the middle of the receiving cavity to support the longitudinal guide rails, reducing the span of the longitudinal guide rails to allow for a larger volume slurry storage tank.

[0036] Preferably, there are multiple support members, which are spaced apart along the extension direction of the longitudinal guide rail to improve the support effect of the longitudinal guide rail and prevent the longitudinal guide rail from bending and deforming due to excessive span.

[0037] Preferably, the stirring head has a box-type frame structure;

[0038] And / or, in step S1, the slurry storage tank is provided on land for producing the standard mud.

[0039] In this design, the box-frame structure mixing head has a larger mixing area and higher mixing efficiency compared to the spiral mixing head. It also has higher strength and is less susceptible to damage from hard mud lumps in the slurry.

[0040] A storage tank is set up on land, which makes it convenient to make pulp on both water and land at the same time, improving pulping efficiency and eliminating the need to dig pits on land, thus reducing environmental pollution.

[0041] Preferably, the slurry storage tank further includes a delivery pump and a pipeline, the delivery pump being installed on the pipeline, one end of the pipeline communicating with the receiving cavity of the slurry storage tank, and the other end of the pipeline being equipped with a pump head for placement into the flushing pit.

[0042] In this design, a delivery pump is used to pump the solidified mud from the storage tank to the scouring pit. The delivery pump and pipeline are mounted on the casing, facilitating rapid pumping operations and eliminating the need for additional pipelines and pumps, thus improving construction efficiency.

[0043] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0044] The positive and progressive effects of this invention are as follows: This construction method subdivides the process of preparing slurry-stabilized soil into two steps: standard slurry preparation and solidifier addition. The large-scale standard slurry preparation is carried out on land, reducing the difficulty of water-based operations and improving economic efficiency. The smaller-scale solidifier addition is carried out on a flatbed barge. Since the flatbed barge is close to the bridge pile foundation, the transportation time of the slurry-stabilized soil can be reduced. This solves the problem of the slurry-stabilized soil losing its fluidity due to pre-addition of solidifier and long-term transportation, thus ensuring the workable time of the slurry-stabilized soil. Compared with preparing the slurry-stabilized soil all at once on land or water, this method reduces the difficulty of water-based operations and facilitates preparation of the slurry-stabilized soil near the construction site, reducing transportation time and improving construction efficiency. Since standard slurry without solidifier is transported in step S3, this construction method no longer restricts the transportation time of the standard slurry; as long as slurry reserves are prepared before pumping the slurry-stabilized soil, it allows for convenient and flexible construction. If the slurry with added curing agent is being transported, there are strict requirements on the transportation distance and time. It cannot exceed the initial setting time of the slurry-cured soil to prevent the cured soil from losing its fluidity during long-term transportation, which could lead to subsequent pumping blockage. Attached Figure Description

[0045] Figure 1 This is a flowchart illustrating a preferred embodiment of the construction method for protecting bridge pile foundations using mud-stabilized soil.

[0046] Figure 2 This is a schematic diagram of a slurry storage tank for producing slurry-stabilized soil according to a preferred embodiment of the present invention.

[0047] Figure 3 for Figure 2 Cross-sectional view along line AA.

[0048] Figure 4 This is a schematic diagram of a flatbed barge at a construction site on water, according to a preferred embodiment of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] Casing 1

[0051] Receiving cavity 11

[0052] Stirring device 2

[0053] Mobile Car 21

[0054] Longitudinal trolley 211

[0055] Horizontal trolley 212

[0056] Stirring head 22

[0057] Guide rail 23

[0058] Horizontal guide rail 231

[0059] Longitudinal guide rail 232

[0060] Support component 3

[0061] 10 slurry storage tank

[0062] Flat barge 20

[0063] 30 transfer pump

[0064] Pipe 40

[0065] Pump truck 50

[0066] Bridge pile foundation 100

[0067] 200 scour pits Detailed Implementation

[0068] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0069] like Figures 1-4 As shown in the figure, this embodiment discloses a construction method for protecting bridge pile foundations using mud-stabilized soil. The construction method includes the following steps:

[0070] S1. Prepare standard mud on land;

[0071] S2. Position a flat barge 20 near the bridge pile foundation 100. A slurry storage tank 10 is installed on the flat barge 20.

[0072] S3. Transport the standard mud slurry into the slurry storage tank 10;

[0073] S4. Add a curing agent to the slurry storage tank 10 and stir to obtain slurry-cured soil;

[0074] S5. Pump the slurry-stabilized soil into the scour pit 200 next to the bridge pile foundation 100.

[0075] In step S1, standard mud slurry is prepared on land to reduce the difficulty of subsequent water-based operations and improve economic efficiency. If mud slurry is prepared and solidified in one go using water-based construction equipment, there will be water-based soil transportation and water-based mixing construction, which will result in high transportation costs, high operational difficulty, and low economic efficiency.

[0076] In steps S2-S4, a small amount of curing agent is added to the flat barge 20. Since the flat barge 20 is close to the bridge pile foundation 100, the transportation time of the slurry-stabilized soil can be reduced. This solves the problem of the slurry-stabilized soil losing its fluidity due to the addition of curing agent in advance and long-term transportation, thus ensuring the workable time of the slurry-stabilized soil. Since standard slurry without curing agent is transported in step S3, this construction method no longer restricts the transportation time of standard slurry. As long as slurry reserves are prepared before pumping the slurry-stabilized soil, it is convenient and flexible for construction. If slurry with added curing agent is transported, there are strict requirements on the transportation distance and time. It cannot exceed the initial setting time of the slurry-stabilized soil to prevent the slurry from losing its fluidity during long-term transportation, which could lead to subsequent pumping pipe blockage.

[0077] In step S3, the standard mud can be transported by either tanker trucks or pipelines, and the choice can be made flexibly according to the on-site construction conditions.

[0078] In step S5, the slurry-stabilized soil is pumped through a pipeline to the underwater scour pit 200 of the bridge pile foundation 100. Due to the good fluidity of the slurry-stabilized soil in the early stage, when it is pumped into the scour pit 200 around the bridge pile foundation 100, the slurry can spontaneously fill the gap between the scour pit 200 and the pile and soil, leaving no gaps and making it difficult to generate scour points inside. After the slurry-stabilized soil is formed, it has high structural strength, good integrity, smooth surface and a certain slope, which can effectively resist the scouring and flushing effect of water flow and improve the protective effect of the bridge pile foundation 100.

[0079] Preferably, the location of the pumping point can be obtained in the early stage by surveying the terrain at the bottom of the bridge pile foundation 100. By adjusting the position of the flat barge 20 in real time, the flat barge 20 is anchored and positioned above the pumping point, ensuring that the flat barge 20 is as close as possible to the pumping point, which facilitates construction and improves construction efficiency.

[0080] like Figure 4As shown, step S3 includes: step S31, transporting standard slurry to the construction site on the bridge deck using a tanker truck; and step S32, using a pump truck 50 to transport the standard slurry from the tanker truck to the slurry storage tank 10. Since the tanker truck transports standard slurry without a curing agent, the transportation time is no longer strictly limited, facilitating advance preparation of the standard slurry and allowing for flexible construction. The pump truck 50 provides power for pumping the slurry to solidify the soil. Preferably, at least two pumps are installed on the pump truck 50's delivery pipeline. When one pump is working, the others serve as backups, avoiding delays due to the failure of a single pump and achieving uninterrupted construction.

[0081] More preferably, the pump has at least two input pipes connected in parallel, and the at least two input pipes are respectively connected to different transport tank trucks. After the first transport tank truck finishes transporting, it is convenient for the second transport tank truck to continue transporting, and so on, to ensure the continuity of construction, reduce construction time, and improve construction efficiency.

[0082] Preferably, the construction site is located directly above the bridge pile foundation 100 to shorten the length of the pump truck's pipeline.

[0083] In step S4, the solidifying agent is added only after the slurry storage tank 10 has stored a preset volume of standard slurry. This allows for the production of a larger volume of solidified slurry, facilitating the pumping of a large amount of solidified slurry to the flushing pit 200 at once to achieve a certain "initial filling volume." This significantly reduces the underwater loss rate of the solidified slurry, thereby substantially reducing construction costs. If solidified slurry is transported and pumped truckload by truck, the amount pumped each time is too small, the construction time is long, and the underwater loss rate of the solidified slurry is high.

[0084] The test results show that the erosion rate of the solidified soil constructed using this method is low, controlled within 20%, which can reduce construction costs.

[0085] Following step S5, the process includes step S6: checking whether the elevation of the solidified mud in the scour pit 200 meets the design requirements. If yes, construction ends; otherwise, return to step S1. The filling elevation of the scour pit 200 is determined based on the aquatic environment at the bridge pile foundation 100. In most cases, the scour pit 200 does not need to be completely filled; filling it to the required design elevation is sufficient to solidify the bridge pile foundation 100 and achieve scour prevention. Through the detection and cyclical steps in step S6, it can be ensured that the filling elevation of the scour pit 200 meets the design requirements. Preferably, underwater sonar is used for detection in step S6. Of course, other detection equipment can also be used in other embodiments.

[0086] like Figure 2 and Figure 3As shown, the slurry storage tank 10 includes a shell 1 and a stirring device 2. The shell 1 has a receiving cavity 11 with an opening at the top. The stirring device 2 includes a moving trolley 21 and a stirring head 22. The stirring head 22 is located in the receiving cavity 11 and is connected to the moving trolley 21. The moving trolley 21 can drive the stirring head 22 to move, and the stirring head 22 can rotate under the drive of the driving mechanism. The stirring head 22 of the stirring device 2 moves within the receiving cavity 11 of the shell 1 under the drive of the moving trolley 21. The stirring head 22 rotates during the movement, thereby stirring the slurry solidified soil in the receiving cavity 11, so that the standard slurry and solidifying agent are mixed evenly, improving the slurry preparation efficiency. Furthermore, the shell 1 can be used for both slurry preparation and storage of slurry solidified soil.

[0087] Preferably, the shell 1 is a box, and the box is provided with lifting lugs to facilitate the overall hoisting of the slurry storage tank 10.

[0088] like Figure 2 and Figure 3 As shown, the mixing device 2 also includes guide rails 23. Two guide rails 23 are installed parallel to each other on the housing 1 and located above the opening of the housing 1. The two guide rails 23 extend along the length and / or width direction of the slurry storage tank 10. The rollers of the moving trolley 21 cooperate with the guide rails 23 and can move along the guide rails 23. By setting the guide rails 23, the directionality and smoothness of the movement of the moving trolley 21 are improved. The moving trolley 21 moves on the guide rails 23, thereby driving the mixing head 22 to move, increasing the mixing area of ​​the mixing head 22 and improving the mixing effect. By installing the guide rails 23 above the opening, the moving trolley 21 is positioned above the slurry and away from the slurry. Only the mixing head 22 below the moving trolley 21 moves and mixes the slurry within the receiving cavity 11, preventing the moving trolley 21 from moving in the slurry and protecting the moving trolley 21.

[0089] Of course, in an alternative embodiment, the mobile trolley can move in places where no guide rails are provided.

[0090] Of course, in an alternative embodiment, the mobile trolley can move outside the box or inside the box.

[0091] In this embodiment, as Figure 2 and Figure 3As shown, the guide rail 23 includes a transverse guide rail 231 and a longitudinal guide rail 232, and the moving trolley 21 includes a longitudinal trolley 211 and a transverse trolley 212. The two longitudinal guide rails 232 are installed on opposite sides of the housing 1 along the length of the housing 1, and the two longitudinal trolleys 211 are respectively installed at both ends of the two transverse guide rails 231. The two transverse guide rails 231 are movably mounted on the two longitudinal guide rails 232 via the longitudinal trolleys 211, and the transverse trolleys 212 are movably mounted on the two transverse guide rails 231. The stirring head 22 is connected to the transverse trolley 212. The transverse trolley 212 can drive the stirring head 22 to move along the transverse guide rail 231. At the same time, the longitudinal trolley 211 can drive the transverse guide rail 231, the transverse trolley 212, and the stirring head 22 to move longitudinally, realizing the coverage of any area of ​​the receiving cavity 11 by the stirring head 22, preventing dead corners, and improving the stirring effect.

[0092] The slurry storage tank 10 also includes a support member 3, which is located in the middle of the receiving cavity 11. The lower end of the support member 3 is connected to the inner wall of the shell 1. There are two sets of stirring devices 2, which together cover the receiving cavity 11. The longitudinal guide rail 232 of each set of stirring devices 2 is connected to the upper end of the support member 3. The two stirring devices 2 can perform stirring operations simultaneously, improving stirring efficiency. The support member 3 is set in the middle of the receiving cavity 11 to support the longitudinal guide rail 232, reducing the span of the longitudinal guide rail 232, so as to set up a larger volume slurry storage tank 10.

[0093] In this embodiment, there are multiple support members 3, which are spaced apart along the extension direction of the longitudinal guide rail 232 to improve the support effect of the longitudinal guide rail 232 and prevent the longitudinal guide rail 232 from bending and deforming due to excessive span.

[0094] In this embodiment, the stirring head 22 has a box-type frame structure. Compared with the spiral-shaped stirring head 22, the box-type frame structure stirring head 22 has a larger stirring area, higher stirring efficiency, and higher strength, making it less susceptible to damage from hard mud lumps in the slurry.

[0095] In an optional embodiment, the stirring head is a propeller structure.

[0096] Preferably, in step S1, a slurry storage tank 10 is set up on land. The slurry storage tank 10 is used to make standard mud, which realizes slurry making on land and water at the same time, improves slurry making efficiency, and eliminates the need to dig pits on land, thus reducing environmental pollution.

[0097] like Figure 4As shown, the slurry storage tank 10 also includes a delivery pump 30 and a pipeline 40. The delivery pump 30 is installed on the pipeline 40. One end of the pipeline 40 is connected to the receiving cavity 11 of the slurry storage tank 10, and the other end of the pipeline 40 is equipped with a pump head, which is used to be placed into the flushing pit 200. The delivery pump 30 is used to pump the slurry solidified soil in the slurry storage tank 10 to the flushing pit 200. The delivery pump 30 and pipeline 40 are configured on the shell 1 to facilitate rapid pumping construction operations, eliminating the need for additional pipeline 40 and delivery pump 30, thus improving construction efficiency.

[0098] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A construction method for protecting bridge pile foundations using mud-stabilized soil, characterized in that, It includes the following steps: S1. Prepare standard mud on land; S2. Position a flat barge near the bridge pile foundation, the flat barge being equipped with a slurry storage tank; S3. The standard mud is transported to the mud storage tank; S4. Add a curing agent to the slurry storage tank and stir to obtain slurry-cured soil; S5. Pump the solidified mud into the scouring pit next to the bridge pile foundation.

2. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 1, characterized in that, Step S3 includes: Step S31: Transport the standard mud to the construction site on the bridge deck using a tanker truck; Step S32: Use a pump truck to transport the standard mud from the transport tanker to the slurry storage tank.

3. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 1, characterized in that, In step S4, the curing agent is added only after the slurry storage tank has stored a preset volume of standard slurry.

4. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 1, characterized in that, The step S5 is followed by the following steps: S6. Check whether the elevation of the solidified mud in the flushing pit meets the design requirements. If yes, the construction ends; otherwise, return to step S1.

5. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 1, characterized in that, The slurry storage tank includes a shell and a stirring device. The shell has a receiving cavity with an opening at the top. The stirring device includes a moving trolley and a stirring head. The stirring head is located in the receiving cavity and is connected to the moving trolley. The moving trolley can drive the stirring head to move, and the stirring head can rotate under the drive of a drive mechanism.

6. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 5, characterized in that, The stirring device also includes guide rails, two of which are installed parallel to each other on the housing and above the opening of the housing. The two guide rails extend along the length and / or width of the slurry storage tank. The rollers of the moving trolley cooperate with the guide rails and can move along the guide rails.

7. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 6, characterized in that, The guide rails include transverse guide rails and longitudinal guide rails. The moving trolley includes a longitudinal trolley and a transverse trolley. The two longitudinal guide rails are installed on opposite sides of the housing along the length of the housing. The two longitudinal trolleys are respectively installed at both ends of the two transverse guide rails. The two transverse guide rails are movably mounted on the two longitudinal guide rails via the longitudinal trolleys. The transverse trolleys are movably mounted on the two transverse guide rails. The stirring head is connected to the transverse trolleys.

8. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 7, characterized in that, The slurry storage tank also includes a support member located in the middle of the receiving cavity. The lower end of the support member is connected to the inner wall of the shell. There are two sets of stirring devices, which together cover the receiving cavity. The longitudinal guide rail of each set of stirring devices is connected to the upper end of the support member.

9. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in claim 8, characterized in that, The stirring head has a box-type frame structure; And / or, in step S1, the slurry storage tank is provided on land for producing the standard mud.

10. The construction method for protecting bridge pile foundations using mud-stabilized soil as described in any one of claims 1-9, characterized in that, The slurry storage tank also includes a delivery pump and a pipeline. The delivery pump is installed on the pipeline. One end of the pipeline is connected to the receiving cavity of the slurry storage tank, and the other end of the pipeline is equipped with a pump head, which is used to be placed into the flushing pit.

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