A construction method for fluid plastic mud pile foundation

Abstract

The invention relates to a method for constructing a fluid plastic silt pile foundation, and belongs to the technical field of pile foundation construction. A drilling device is provided, and the drilling device firstly drills a hole at a designated position until the drilling device reaches the bottom of the silt layer; after the drilling device reaches the bottom of the silt layer, a filling space can be formed inside the drilling device, and construction personnel insert a template into the filling space through the ground; finally, the drilling device is disassembled, and the drilling device is lifted out of the silt layer by a crane; such a setting can realize that the template is set in the silt layer, and because the template is a sealed structure with a hollow interior, the silt in the template can be pumped out of the template by a mud pump, and after the silt in the template is emptied, cement is poured, thereby realizing the ability to build a cement foundation in the silt layer. Such a setting replaces the traditional method of building a block stone layer in the silt layer, so that the pile foundation construction foundation of this scheme is more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of pile foundation construction, and in particular relates to a fluid plastic mud pile foundation construction method. Background Art

[0002] In the management of lake, river and channel slopes, slope concrete, ecological vegetation block lining and mortar stone slope protection are often adopted, and foundation treatment often encounters deep silt soft foundation soil conditions; during the construction process, if the soft foundation is not well treated, uneven foundation settlement is likely to occur after it is disturbed, causing damage to the project.

[0003] For example, the invention patent with patent application publication number: CN114908729A discloses a construction method for treating silt soft foundation with fir piles, which includes the following steps: S1: construction preparation, measuring the depth of the silt layer, designing the length of the fir pile, and sharpening the thin end of the fir pile into a pointed head; S2: measurement and layout, placing the center line, width edge line and top surface line in the silt layer; S3: silt squeezing with stones, throwing stones between the width edge lines of the silt layer to form a stone layer, and the direction of the stone throwing is to expand in sequence along the channel slope toward the center of the channel to squeeze out the silt in the silt layer layer by layer; S4: piling, after secondary measurement and layout, marking the piling position on the center line of the stone layer, controlling the verticality of the fir pile and pressing the fir pile down in the stone layer to the designed elevation, keeping the head end of the fir pile protruding from the stone layer; S5: connection beam construction, casting the connection beam wrapping the head end of the fir pile on the stone layer.

[0004] Based on the search of the above patents and the shortcomings found therein:

[0005] The existing construction of silt pile foundations is to set a stone layer in the silt layer as the foundation. However, due to its own instability, the stone layer cannot be used as a foundation that bears a larger weight, thereby limiting the bearing capacity of the pile foundation. Summary of the invention

[0006] In order to solve the problem that the existing construction of silt pile foundations is to set a stone layer as a foundation in the silt layer, but the stone layer cannot be used as a foundation for bearing a larger weight due to its own instability, thereby limiting the bearing capacity of the pile foundation, the present invention provides a fluid plastic silt pile foundation construction method.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for constructing a fluidized sludge pile foundation comprises the following steps:

[0009] S1: Measure the thickness of the silt layer in the specified area, set up a drilling device, and adjust the height of the drilling device according to the thickness of the silt layer;

[0010] S2: The drilling device is used to drill holes in the designated area;

[0011] S3: After the drilling device reaches a designated depth in a designated area, a filling space is formed inside the drilling device, and a template is provided, and the template is arranged in the filling space;

[0012] S4: After the template is installed in the filling space, the drilling device is disassembled and hoisted by a crane;

[0013] S5: using a mud pump to extract the sludge in the template to form an internal hollow injection space;

[0014] S6: After the sludge in the template is completely pumped out, pouring cement into the template;

[0015] S7: After the cement solidifies, insert the pile foundation into the center of the cement area;

[0016] S8: Repeat steps S1-S7 until pile foundations are inserted into all designated areas and the construction is completed.

[0017] As a preferred technical solution of the present invention, the drilling device includes a drilling assembly, a connecting shell and a driving assembly. The connecting shell includes a plurality of square shells, and the plurality of square shells are detachably arranged in sequence from top to bottom. The drilling assembly is coaxially connected to the bottom square shell for drilling the silt layer; the driving assembly is coaxially connected to the top square shell for driving the drilling assembly to rotate.

[0018] As a preferred technical solution of the present invention, the square shell includes an outer square ring and an inner square ring that are coaxially arranged, the outer square ring is coaxially sleeved with the inner square ring, an annular space is formed between the outer square ring and the inner square ring, and several annular spaces are interconnected from top to bottom to form a sealed filling space.

[0019] As a preferred technical solution of the present invention, the drilling assembly includes a plurality of drilling units, and the plurality of drilling units are matched one-to-one with the number of side walls of the outer square ring. A drilling groove is provided at the bottom of each side wall of the outer square ring located at the bottom end, and the drilling unit is arranged in the corresponding drilling groove; the drilling unit includes a drilling plate and a drilling spring, and the drilling plate can be telescopically arranged in the drilling groove, and the two ends of the drilling spring are respectively connected to the drilling plate and the side wall in the drilling groove.

[0020] As a preferred technical solution of the present invention, the driving assembly includes a driving motor, an internally hollow driving shell and a plurality of driving units, and the plurality of driving units are matched with a plurality of square shells in a one-to-one manner; the driving unit includes a driving roller shell and a connecting rod, and the plurality of driving roller shells are arranged in sequence along the central axis direction of the connecting shell, the driving shell is coaxially connected to the topmost square shell, the driving motor is arranged inside the driving shell, the output end of the driving motor coaxially extends out of the driving shell, and the output end of the driving motor is coaxially connected to the top of the driving roller shell, and the two ends of the connecting rod are respectively connected to the driving roller shell and the square shell.

[0021] As a preferred technical solution of the present invention, the inner square ring and the outer square ring of the square shell together form a connecting slot, the connecting rod is slidably arranged in the connecting slot, one end of the connecting rod is connected to the driving roller shell, and the other end can lock or release its abutting relationship with the outer square ring.

[0022] As a preferred technical solution of the present invention, the driving assembly also includes a lifting cylinder, and the driving unit also includes a driving rod and a driving spring, the two ends of the driving rod are respectively hinged to the driving roller shell and one end of the connecting rod close to the driving roller shell, and the central axis of the driving rod and the central axis of the connecting rod are on the same vertical plane; the lifting cylinder is arranged in the driving shell, and the output end of the lifting cylinder is connected to the driving motor, the driving spring is arranged in the connecting slot, and the two ends of the driving spring are respectively connected to the inner square ring and the connecting rod.

[0023] As a preferred technical solution of the present invention, the drilling device also includes a plurality of sealing units, which are matched one-to-one with the number of side walls of the outer square ring, and any of the sealing units is sealed between the side wall of the outer square ring and the side wall of the inner square ring; the sealing unit includes a sealing plate, which is hingedly arranged on the inner side wall of the outer square ring, and a plurality of the sealing plates can jointly lock or release their sealing matching relationship with the filling space.

[0024] As a preferred technical solution of the present invention, the sealing unit also includes a pull rope, a rotating rod, an abutment rod and an abutment spring. The interior of the outer square ring at the bottom is hollow. The rotating rod can be rotatably hinged to the interior of the outer square ring at the bottom. The abutment rod is slidably arranged inside the outer square ring. One end of the abutment rod is abutted against the top end of the rotating rod, and the other end of the abutment rod extends into the drilling groove. The two ends of the pull rope are respectively connected to the sealing plate and the bottom end of the rotating rod, and the two ends of the abutment spring are respectively connected to the bottom end of the rotating rod and the inner wall of the outer square ring; the central axis of the abutment rod and the central axis of the rotating rod are in the same vertical plane.

[0025] As a preferred technical solution of the present invention, one end of the abutment rod extending into the drilling groove is inclined, and the vertical height of the abutment rod gradually decreases along the sliding direction of the abutment rod approaching the rotating rod. The inclined end of the abutment rod can lock or release its abutment relationship with the drilling plate.

[0026] The beneficial effects of the present invention are:

[0027] The present scheme is provided with a drilling device, which first drills a hole at a designated position until the drilling device reaches the bottom of the silt layer; after the drilling device reaches the bottom of the silt layer, a filling space can be formed inside the drilling device, and the construction personnel insert the template into the filling space through the ground; finally, the drilling device is disassembled, and the drilling device is lifted out of the silt layer by a crane; such a setting can realize that the template is set in the silt layer, and because the template is a sealed structure with a hollow interior, the silt in the template can be pumped out of the template by a mud pump, and after the silt in the template is emptied, cement is poured, thereby realizing the ability to build a cement foundation in the silt layer. Such a setting replaces the traditional method of building a block stone layer in the silt layer, making the pile foundation construction foundation of the present scheme more stable, and solving the problem that the existing construction of silt pile foundations is to set a block stone layer as a foundation in the silt layer, but the block stone layer cannot be used as a foundation that bears a larger weight due to its own instability, thereby limiting the bearing capacity of the pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram of a construction site for a fluid plastic silt pile foundation construction method of the present invention;

[0030] Figure 2 It is a front view of a drilling device for a fluid plastic mud pile foundation construction method of the present invention;

[0031] Figure 3A schematic diagram of a drilling assembly of a fluid plastic mud pile foundation construction method of the present invention;

[0032] Figure 4 This is an internal diagram of a drilling device for a fluid plastic mud pile foundation construction method of the present invention;

[0033] Figure 5 It is a schematic diagram of a sealing unit of a fluid plastic mud pile foundation construction method of the present invention.

[0034] Description of main symbols:

[0035] In the figure: 1. Drilling assembly; 101. Drilling plate; 102. Drilling spring; 2. Connecting shell; 201. Square shell; 2011. Outer square ring; 2012. Inner square ring; 3. Driving assembly; 301. Driving motor; 302. Driving roller shell; 303. Connecting rod; 304. Driving spring; 305. Lifting cylinder; 306. Driving rod; 307. Driving shell; 4. Template; 5. Sealing unit; 501. Sealing plate; 502. Pull rope; 503. Rotating rod; 504. Abutting rod; 505. Abutting spring. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0037] See also Figure 1-5 This embodiment provides a fluid plastic mud pile foundation construction method, comprising the following steps:

[0038] S1: Measure the thickness of the silt layer in the specified area, set up a drilling device, and adjust the height of the drilling device according to the thickness of the silt layer;

[0039] S2: Drilling the hole in the designated area by the drilling device;

[0040] S3: After the drilling device reaches the designated depth of the designated area, a filling space is formed inside the drilling device, and a template 4 is provided, and the template 4 is arranged in the filling space;

[0041] S4: After the template 4 is installed in the filling space, the drilling device is disassembled and lifted by a crane;

[0042] S5: using a mud pump to extract the sludge in the template 4 to form an internal hollow pouring space;

[0043] S6: After the sludge in the template 4 is completely pumped out, cement is poured into the template 4;

[0044] S7: After the cement solidifies, insert the pile foundation into the center of the cement area;

[0045] S8: Repeat steps S1-S7 until pile foundations are inserted into all designated areas and the construction is completed.

[0046] The present scheme is provided with a drilling device, which first drills a hole at a designated position until the drilling device reaches the bottom of the silt layer; after the drilling device reaches the bottom of the silt layer, a filling space can be formed inside the drilling device, and the construction personnel insert the template 4 into the filling space through the ground; finally, the drilling device is disassembled, and the drilling device is lifted out of the silt layer by a crane; such a setting can realize that the template 4 is set in the silt layer, and because the template 4 is a sealed structure with a hollow interior, the silt located in the template 4 can be pumped out of the template 4 by a mud pump, and after the silt in the template 4 is emptied, cement is poured, thereby realizing the ability to build a cement foundation in the silt layer. Such a setting replaces the traditional method of building a block stone layer in the silt layer, making the pile foundation construction foundation of the present scheme more stable, and solving the problem that the existing construction of silt pile foundations is to set a block stone layer as a foundation in the silt layer, but the block stone layer cannot be used as a foundation that bears a larger weight due to its own instability, thereby limiting the bearing capacity of the pile foundation.

[0047] Specifically, the drilling device of the present solution needs to be described in detail. The drilling device of the present solution includes a drilling assembly 1, a connecting shell 2 and a driving assembly 3. The connecting shell 2 includes a plurality of square shells 201, and the plurality of square shells 201 are detachably arranged from top to bottom. The drilling assembly 1 is coaxially connected to the bottommost square shell 201 for drilling the silt layer; the driving assembly 3 is coaxially connected to the topmost square shell 201 for driving the drilling assembly 1 to rotate. It is worth noting that since the connecting shell 2 of the present solution is detachably arranged by a plurality of square shells 201, the structural effect of adjusting the height of the drilling device according to the depth of the silt layer mentioned in the above-mentioned embodiment S1 is achieved.

[0048] In order to realize the drilling device mentioned in S3 of the above embodiment to be provided with a filling space, the square housing 201 of this solution includes an outer square ring 2011 and an inner square ring 2012 arranged coaxially, the outer square ring 2011 is coaxially sleeved with the inner square ring 2012, an annular space is formed between the outer square ring 2011 and the inner square ring 2012, and a plurality of annular spaces are interconnected from top to bottom to form a sealed filling space. The structure of the square housing 201 is further defined here, and an annular space is formed between the outer square ring 2011 and the inner square ring 2012, so that a plurality of annular spaces are interconnected from top to bottom to form a sealed filling space, thereby allowing the drilling device of this solution to have a filling space structure.

[0049] Furthermore, based on the structure of the connecting shell 2 disclosed in the above embodiment, the present scheme further defines the drilling assembly 1; the drilling assembly 1 includes a plurality of drilling units, and the plurality of drilling units correspond one-to-one to the number of side walls of the outer square ring 2011. It should be noted that the number of side walls here means the number of side walls constituting the outer square ring 2011; a drilling groove is provided at the bottom of each side wall of the outer square ring 2011 located at the bottom, and the drilling unit is arranged in the corresponding drilling groove; the drilling unit includes a drilling plate 101 and a drilling spring 102, and the drilling plate 101 can be telescopically arranged in the drilling groove, and the two ends of the drilling spring 102 are respectively connected to the drilling plate 101 and the side walls in the drilling groove. With such an arrangement, since the silt resistance in the silt layer is not large, when the drilling plate 101 rotates in the silt layer, the drilling plate 101 will extend out of the drilling groove due to the force of the drilling spring 102; when the drilling plate 101 reaches the bottom of the silt layer, the drilling plate 101 continues to descend, and it will be subject to resistance and shrink in the drilling groove, and a sensor is provided in the drilling groove. When the drilling plate 101 and the sensor are pressed together, it indicates that the drilling device has reached the specified position.

[0050] Further, on the basis of the structure of the connection shell 2 disclosed in the above embodiment, the present solution further defines the drive assembly 3. The drive assembly 3 of the present solution includes a drive motor 301, a drive shell 307 with a hollow interior, and a plurality of drive units, and the plurality of drive units are matched with a plurality of square shells 201 in a one-to-one correspondence; the drive unit includes a drive roller shell 302 with a hollow interior and a connecting rod 303, and the plurality of drive roller shells 302 are arranged in sequence along the central axis direction of the connection shell 2, the drive shell 307 is coaxially connected to the topmost square shell 201, the drive motor 301 is arranged inside the drive shell 307, the output end of the drive motor 301 coaxially extends out of the drive shell 307, and the output end of the drive motor 301 is coaxially connected to the top of the drive roller shell 302, and the two ends of the connecting rod 303 are respectively connected to the drive roller shell 302 and the square shell 201. Through such a setting, the driving motor 301 controls the driving roller shell 302 to rotate by rotating. Since the two ends of the connecting rod 303 are respectively connected to the driving roller shell 302 and the square shell 201, the square shell 201 is driven to rotate; since the several driving roller shells 302 of the present scheme are matched one-to-one with the several square shells 201, the connection shell 2 is rotated.

[0051] In addition, it should be noted that if the overall square shell 201 is to be rotated, the connecting rod 303 needs to pass through the filling space and be connected to the outer square ring 2011 and the inner square ring 2012 respectively; however, such a setting makes it possible for the template 4 to be inserted into the filling space, and there will be a problem of interference between the template 4 and the connecting rod 303. In order to solve this problem, the inner square ring 2012 and the outer square ring 2011 of the square shell 201 of the present solution jointly form a connecting slot, and the connecting rod 303 is slidably arranged in the connecting slot, and one end of the connecting rod 303 is connected to the driving roller shell 302 The other end of the connecting rod 303 can lock or release its abutting matching relationship with the outer square ring 2011; by providing a sliding connecting rod 303, when the connecting rod 303 is connected to the outer square ring 2011 and the driving roller shell 302 by sliding, the connecting shell 2 rotates along with the driving roller shell 302; when the connecting rod 303 releases its connection with the outer square ring 2011 by sliding, one end of the connecting rod 303 has slid into the connecting slot of the inner square ring 2012, so that the connecting rod 303 is no longer located in the filling space, and at this time the template 4 can be smoothly set in the filling space.

[0052] In addition, it is worth mentioning that the driving component 3 of the present scheme also includes a lifting cylinder 305, and the driving unit also includes a driving rod 306 and a driving spring 304. The two ends of the driving rod 306 are respectively hinged to the driving roller shell 302 and the end of the connecting rod 303 close to the driving roller shell 302, and the central axis of the driving rod 306 and the central axis of the connecting rod 303 are on the same vertical plane; the lifting cylinder 305 is arranged in the driving shell 307, and the output end of the lifting cylinder 305 is connected to the driving motor 301; in this arrangement, the output end of the driving motor 301 is coaxially connected to the driving roller shell 302 to control the driving roller shell 302 to rotate. Since the connecting rod 303 is located in the connecting slot formed by the inner square ring 2012 and the outer square ring 2011 at this time, when the driving roller shell 302 drives the connecting rod 303 to rotate, it will also control the connecting shell 2 to rotate. The function of the lifting cylinder 305 is to control the lifting of the driving roller shell 302, so that the driving rod 306 set on the driving roller shell 302 pulls the connecting rod 303 connected thereto to slide, so that the other end of the connecting rod 303 can lock or release its abutting relationship with the outer square ring 2011. In addition, in order to ensure the sliding effect of the connecting rod 303, the driving spring 304 of the present scheme is arranged in the connecting slot, and the two ends of the driving spring 304 are respectively connected to the inner square ring 2012 and the connecting rod 303; when the driving roller shell 302 is raised or lowered, the inclination angle of the driving rod 306 hinged thereto will be controlled to become smaller or larger. When the inclination angle of the driving rod 306 becomes smaller, the connecting rod 303 moves toward the direction close to the outer square ring 2011, and the connecting rod 303 locks its matching relationship with the outer square ring 2011; when the inclination angle of the driving rod 306 becomes larger, due to the action force of the driving spring 304, the connecting rod 303 moves toward the direction away from the outer square ring 2011, and the connecting rod 303 releases its matching relationship with the outer square ring 2011.

[0053] It is also worth mentioning that the drilling device of the present scheme is only used for drilling holes into the silt layer. In actual work, it is necessary to use a crane to lift the entire drilling device. It should be noted that the output end of the crane cannot rotate and can only be raised and lowered. The output end of the crane is connected to the drive housing 307. As the drive housing 307 works, the output end of the crane continuously controls the height of the drilling device to lower, ensuring the normal operation of the device.

[0054] It should be noted that, during the drilling movement of the drilling device of this scheme toward the bottom of the silt layer, it is necessary to ensure that the silt does not enter the filling space, so that when the drilling device reaches the bottom of the silt layer, the template 4 is inserted into the filling space. Based on this, the drilling device of this scheme also includes a plurality of sealing units 5, and the plurality of sealing units 5 correspond to the number of side walls of the outer square ring 2011 in a one-to-one manner, and any sealing unit 5 is sealed between the side wall of the outer square ring 2011 and the side wall of the inner square ring 2012; the sealing unit 5 includes a sealing plate 501, and the sealing plate 501 is hingedly arranged on the inner side wall of the outer square ring 2011, and the plurality of sealing plates 501 can jointly lock or release the sealing matching relationship with the filling space. When the side wall surfaces of each sealing plate 501 are parallel to the bottom surface of the filling space, each sealing plate 501 can jointly cooperate to seal the bottom of the filling space, so that when the drilling device moves toward the bottom of the silt layer, the silt does not enter the filling space. After the drilling device reaches the bottom of the silt layer, each sealing plate 501 releases its sealing cooperation relationship with the bottom of the filling space and ensures that the template 4 is smoothly inserted into the filling space.

[0055] Specifically, the sealing unit 5 of the present solution further includes a pull rope 502, a rotating rod 503, an abutting rod 504 and an abutting spring 505. The interior of the outer square ring 2011 at the bottom is hollow. The rotating rod 503 is rotatably hinged to the interior of the outer square ring 2011 at the bottom. The abutting rod 504 is horizontally slidably arranged inside the outer square ring 2011. One end of the abutting rod 504 abuts against the top end of the rotating rod 503. It is worth noting that a sliding groove is provided on the top side wall of the rotating rod 503. The setting direction of the sliding groove is consistent with that of the rotating rod 5 03 are parallel to each other, one end of the abutment rod 504 is hingedly arranged with the slide slot slidably, the other end of the abutment rod 504 extends into the drilling slot, the two ends of the pull rope 502 are respectively connected to the sealing plate 501 and the bottom end of the rotating rod 503, and the two ends of the abutment spring 505 are respectively connected to the top of the rotating rod 503 and the inner wall of the outer square ring 2011; the central axis of the abutment rod 504 and the central axis of the rotating rod 503 are in the same vertical plane; the bottom end of the rotating rod 503 is close to the corresponding sealing plate 501 in the initial state. It is worth noting that as the abutment rod 504 slides, the rotating rod 503 is driven to rotate, and the bottom of the rotating rod 503 is transformed from the initial position close to the corresponding sealing plate 501 to the position where its bottom is away from the sealing plate 501. Since the length of the pull rope 502 does not change, the sealing plate 501 is rotated along its hinged end, so that each sealing plate 501 is released from its sealing matching relationship with the bottom of the filling space.

[0056] In addition, in order to avoid the subsequent template 4 from interfering with the sealing plate 501 when entering the filling space, each side wall of the outer square ring 2011 at the bottom of the present solution that is in the filling space is provided with an interlocking groove, and the interlocking groove is connected to the filling space. When the rotating rod 503 stops rotating, that is, when the rotating rod 503 rotates to the maximum angle, the sealing plate 501 is interlocked in the corresponding interlocking groove. It is worth noting that in order to ensure that after the rotating rod 503 is reset, each sealing plate 501 will re-seal the bottom of the filling space together, the present solution is also provided with a plurality of interlocking springs, and the plurality of interlocking springs and the plurality of sealing plates 501 are matched one by one, and any interlocking spring is arranged in the corresponding interlocking groove, and the two ends of the interlocking spring are respectively connected to the sealing plate 501 and the side wall of the interlocking groove.

[0057] Furthermore, in order to ensure that the sealing plates 501 release their sealing relationship with the filling space only after the drilling device of this scheme reaches the bottom of the silt layer; the end of the abutment rod 504 of this scheme extending into the drilling groove is inclined, and the vertical height of the abutment rod 504 decreases gradually along the sliding direction of the abutment rod 504 close to the direction of the rotating rod 503, and the inclined end of the abutment rod 504 can lock or release its abutment relationship with the drilling plate 101; through such a setting, after the drilling device reaches the bottom of the silt layer, the drilling plate 101 will continuously shrink toward the direction of the drilling groove, and during this period, the abutment rod 504 set in the drilling groove will be continuously pressed to drive the abutment rod 504 to move. Not only does it achieve the sliding of the abutment rod 504, but it can also ensure that the sealing plates 501 release their sealing relationship with the filling space only after the drilling device reaches the bottom of the silt layer.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for constructing a fluidized sludge pile foundation, characterized in that: The following steps are involved: S1: Measure the thickness of the silt layer in the specified area, set up a drilling device, and adjust the height of the drilling device according to the thickness of the silt layer; S2: The drilling device is used to drill holes in the designated area; S3: After the drilling device reaches a designated depth in a designated area, a filling space is formed inside the drilling device, and a template is provided, and the template is arranged in the filling space; S4: After the template is installed in the filling space, the drilling device is disassembled and hoisted by a crane; S5: using a mud pump to extract the sludge in the template to form an internal hollow injection space; S6: After the sludge in the template is completely pumped out, pouring cement into the template; S7: After the cement solidifies, insert the pile foundation into the center of the cement area; S8: Repeat steps S1-S7 until all designated areas are filled with pile foundations, completing the construction; The drilling device comprises a drilling assembly, a connecting shell and a driving assembly, wherein the connecting shell comprises a plurality of square shells, which are detachably arranged in sequence from top to bottom, and the drilling assembly is coaxially connected to the bottommost square shell for drilling the silt layer; the driving assembly is coaxially connected to the topmost square shell for driving the drilling assembly to rotate; The square shell comprises an outer square ring and an inner square ring which are coaxially arranged, wherein the outer square ring is coaxially sleeved with the inner square ring, and an annular space is formed between the outer square ring and the inner square ring, and a plurality of annular spaces are sequentially connected with each other from top to bottom to form a sealed filling space; The driving assembly includes a driving motor, an internally hollow driving shell and a plurality of driving units, and the plurality of driving units are matched with a plurality of square shells in a one-to-one manner; the driving unit includes a driving roller shell and a connecting rod, and the plurality of driving roller shells are arranged in sequence along the central axis direction of the connecting shell, and the driving shell is coaxially connected to the topmost square shell, the driving motor is arranged inside the driving shell, the output end of the driving motor coaxially extends out of the driving shell, and the output end of the driving motor is coaxially connected to the top of the driving roller shell, and the two ends of the connecting rod are respectively connected to the driving roller shell and the square shell.

2. A method for constructing a fluidized sludge pile foundation according to claim 1, characterized in that: The drilling assembly includes a plurality of drilling units, and the plurality of drilling units are matched one-to-one with the number of side walls of the outer square ring. A drilling groove is provided at the bottom of each side wall of the outer square ring located at the bottom end, and the drilling unit is arranged in the corresponding drilling groove; the drilling unit includes a drilling plate and a drilling spring, and the drilling plate can be telescopically arranged in the drilling groove, and the two ends of the drilling spring are respectively connected to the drilling plate and the side wall in the drilling groove.

3. A method for constructing a fluidized sludge pile foundation according to claim 1, characterized in that: The inner square ring and the outer square ring of the square shell together form a connecting slot, and the connecting rod is slidably arranged in the connecting slot. One end of the connecting rod is connected to the driving roller shell, and the other end can lock or release its abutting matching relationship with the outer square ring.

4. A method for constructing a fluidized sludge pile foundation according to claim 3, characterized in that: The driving assembly also includes a lifting cylinder, and the driving unit also includes a driving rod and a driving spring. The two ends of the driving rod are respectively hinged to the driving roller shell and one end of the connecting rod close to the driving roller shell, and the central axis of the driving rod and the central axis of the connecting rod are on the same vertical plane; the lifting cylinder is arranged in the driving shell, and the output end of the lifting cylinder is connected to the driving motor, and the driving spring is arranged in the connecting slot, and the two ends of the driving spring are respectively connected to the inner square ring and the connecting rod.

5. A method for constructing a fluidized sludge pile foundation according to claim 2, characterized in that: The drilling device also includes a plurality of sealing units, which are matched one-to-one with the number of side walls of the outer square ring, and any of the sealing units is sealed between the side wall of the outer square ring and the side wall of the inner square ring; the sealing unit includes a sealing plate, which is hingedly arranged on the inner side wall of the outer square ring, and a plurality of the sealing plates can jointly lock or release their sealing matching relationship with the filling space.

6. A method for constructing a fluidized sludge pile foundation according to claim 5, characterized in that: The sealing unit also includes a pull rope, a rotating rod, an abutment rod and an abutment spring. The interior of the outer square ring at the bottom is hollow. The rotating rod can be rotatably hinged to the interior of the outer square ring at the bottom. The abutment rod is slidably arranged inside the outer square ring. One end of the abutment rod is abutted against the top end of the rotating rod, and the other end of the abutment rod extends into the drilling groove. The two ends of the pull rope are respectively connected to the sealing plate and the bottom end of the rotating rod, and the two ends of the abutment spring are respectively connected to the bottom end of the rotating rod and the inner wall of the outer square ring; the central axis of the abutment rod and the central axis of the rotating rod are in the same vertical plane.

7. A method for constructing a fluidized sludge pile foundation according to claim 6, characterized in that: One end of the abutment rod extending into the drilling groove is inclined, and the vertical height of the abutment rod gradually decreases along the sliding direction of the abutment rod approaching the rotating rod. The inclined end of the abutment rod can lock or release its abutment relationship with the drilling plate.

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