Large-diameter super-long pile foundation concrete pouring hopper and operation method

Abstract

The invention provides a large-diameter super-long pile foundation concrete pouring hopper and an operation method. The large-diameter super-long pile foundation concrete pouring hopper comprises a hopper body, a flow monitoring and adjusting device, a sinking support, a clamping and deviation rectifying integrated device and a guide pipe connector. High-precision operation of hoisting of the guide pipe and the hopper and uniform control of concrete flow are achieved through accurate positioning of the clamping and deviation rectifying integrated device and the flow monitoring and adjusting device. The novel guide pipe connector adopts the embedded design of a rotary convex part and a rotary concave part, and is matched with a rubber sealing material, so that concrete slurry leakage is prevented, and the sealing performance and reliability of construction are ensured. In addition, the invention further provides a construction method, the construction method comprises the steps of drilling, hole cleaning, steel reinforcement cage lowering, guide pipe assembling, hopper mounting, concrete pouring and the like, the quality and efficiency of pile foundation construction are remarkably improved through accurate calculation of the volume of the first sealing concrete and optimization of the continuous pouring process, the construction performance in the complex environment is remarkable, and the construction period is shortened. The method has remarkable economic benefits and wide application prospects.

Description

Technical Field

[0001] The present invention relates to the field of pile foundation construction, and particularly to a large-diameter and extra-long pile foundation concrete pouring hopper and an operation method thereof. Background Art

[0002] In the field of transportation infrastructure construction, the quality and construction efficiency of pile foundation projects are the keys to ensuring the safety and progress of projects. With the continuous increase of large-scale infrastructure projects, the application of large-diameter and extra-long pile foundations in projects such as bridges and ports is becoming increasingly widespread. However, when facing complex environments and high-precision requirements, the traditional concrete pouring construction methods gradually expose many problems.

[0003] The traditional pile foundation concrete pouring methods usually adopt floating hoppers or crawler cranes to lift square hoppers. These designs not only have problems with insufficient structural stability but are also easily affected by natural factors such as tides and winds, resulting in low construction efficiency and increased safety risks. Especially in complex marine construction environments, the traditional pouring methods require a large number of equipment such as floating barrels, steel ropes, and auxiliary channels. The procurement, transportation, installation, and maintenance of these equipment all require a large amount of time and funds. In addition, the traditional pouring methods are difficult to ensure the continuity and uniformity of concrete pouring, and quality problems such as broken piles and mud inclusion are likely to occur, seriously affecting the bearing capacity and service life of pile foundations.

[0004] With the continuous development of construction technologies, although prefabricated assembly technologies have been introduced in some fields, in the field of pile foundation concrete pouring, there is still a lack of a pouring equipment and method that can be efficient, stable, and adaptable to complex environments. The existing pouring equipment fails to fully consider the influence of complex marine environments in its design and cannot effectively solve the safety and efficiency problems during the construction process. Therefore, there is an urgent need for an innovative concrete pouring hopper and its operation method to solve the deficiencies in the existing technology, improve the quality and efficiency of pile foundation construction, meet the construction requirements in complex environments, and ensure the safety and durability of projects. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-diameter and extra-long pile foundation concrete pouring hopper and an operation method thereof to solve the above technical problems.

[0006] To solve the above technical problems, the present invention provides an operation method for a large-diameter and extra-long pile foundation concrete pouring hopper, including the following steps:

[0007] Step 1: Drill a hole with a drill rig and perform hole cleaning;

[0008] Step 2: Detect the mud index;

[0009] Step 3: Lower the steel reinforcement cage;

[0010] Step 4: Several integrated clamping and deflection correction devices are in place, respectively surrounding multiple positions of the conduit, and the laser rangefinder measures the distance. Then, according to the spacing deviation between each laser rangefinder and the conduit, several integrated clamping and deflection correction devices cooperate with each other to perform lifting and deflection correction; after the deflection correction is completed, the conduit is slowly lowered. Before the conduit is immersed in the pile foundation, two relatively integrated clamping and deflection correction devices clamp the conduit, and the second conduit is hoisted above the first conduit through the remaining integrated clamping and deflection correction devices, and the deflection correction operation is repeated, and the subsequent conduits are lowered in turn;

[0011] Step 5: Perform secondary hole cleaning and test the mud index and sediment thickness again;

[0012] Step 6: Lift the hopper and embed it into the sinking bracket;

[0013] Step 7: Lift the sinking bracket with the hopper fixed to the top of the last section of the conduit, and use multiple clamping and correction integrated devices to lift and correct the position of the hopper and lower it until it is aligned with the pipe mouth of the conduit for assembly; after the assembly is completed, continue to lower the sinking bracket until its bottom is in contact with the ground;

[0014] Step 8: Calculate the volume of the first concrete seal; then pour the first concrete seal according to the required volume; after pouring, measure the burial depth, and then continue pouring normally;

[0015] Step 9: During normal continuous pouring, start the flow monitoring and adjustment device; if the flow velocity sensor measures that the falling speed is too fast, reduce the concrete flow in the conduit;

[0016] Step 10: Measure the buried depth and control the buried depth of the conduit; if it exceeds the set depth, the conduit needs to be removed;

[0017] Step 11: Repeat the normal pouring and conduit removal work until the pouring reaches the designed elevation; the construction is now completed.

[0018] The beneficial effects of the present invention are:

[0019] 1) Improve construction efficiency and precision: Through the synergistic effect of the integrated clamping and correction device and the flow monitoring and adjustment device, accurate correction and intelligent control of concrete flow are achieved during the lifting process of the conduit and hopper, which significantly improves construction efficiency and precision and reduces construction quality problems caused by equipment instability or uneven flow.

[0020] 2) Enhanced equipment flexibility and adaptability: The quick disassembly design of the sinking bracket and the hopper, as well as the multifunctional clamping and correcting device, enable the equipment to quickly adapt to different construction environments and needs. The flat design of the top of the clamp enables it to clamp the conduit and lift the hopper, enhancing the versatility and flexibility of the equipment.

[0021] 3) Improve construction safety: The new catheter interface design adopts a fitting structure of convex and concave rotation, and is equipped with a rubber sealing material, effectively avoiding the problem of concrete leakage, ensuring the tightness and reliability of the construction process, reducing construction risks, and improving construction safety.

[0022] 4) Optimize the construction process: Through the accurate calculation formula of the first sealed concrete volume and the real-time monitoring of the flow rate monitoring and adjustment device, the concrete pouring process is optimized, ensuring the continuity and uniformity of concrete pouring, reducing quality problems such as pile breaking and mud inclusion, and improving the overall quality of the pile foundation.

[0023] 5) Reduce construction costs: The overall structure design is simple, and the hopper adopts a sunken construction design, reducing the use of a large number of auxiliary equipment such as floating barrels and steel ropes in traditional construction, reducing the costs of equipment procurement, transportation, installation and maintenance, and at the same time improving the reuse rate of equipment, with significant economic benefits. Description of the Drawings

[0024] Figure 1 is a schematic diagram before the hopper is hoisted;

[0025] Figure 2 is a schematic diagram of the flow rate monitoring and adjustment device;

[0026] Figure 3 is a schematic diagram of the fitting of the hopper and the sinking support;

[0027] Figure 4 is a three-dimensional schematic diagram of the sinking support;

[0028] Figure 5 is a working schematic diagram of the clamping and deviation correction integrated device;

[0029] Figure 6 is a three-dimensional schematic diagram of the clamping and deviation correction integrated device;

[0030] Figure 7 is a schematic diagram of the convex rotating interface of the catheter;

[0031] Figure 8 is a schematic diagram of the convex rotating interface of the catheter;

[0032] Figure 9 is a schematic diagram after the hopper sinks;

[0033] Among them: 100. Hopper barrel wall; 101. First lifting ear; 102. Steel block; 103. First bolt; 104; Raised steel block; 105. Hopper nozzle; 106. Exhaust hole

[0034] 200. Air pump; 201. Perforated steel plate; 202. Second bolt; 203. Structural pipe; 204. Flow velocity sensor; 205. Airbag; 206. Vent pipe;

[0035] 300. Bracket structure; 301. Groove; 302. Second lifting lug; 303. Fixed steel plate; 304. Third bolt;

[0036] 400 Vehicle body; 401. Axle; 402. Wheel; 403. Slide groove; 404. Slide block; 405. Telescopic rod; 406. Mechanical shaft; 407. Claw; 408. Laser rangefinder;

[0037] 500. Conduit; 501. Conduit interface 501; 502. Rotating convex; 503. Rotating concave; 504. Sealing plate. Detailed implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0039] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0040] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as limiting the quantity.

[0041] As Figures 1 - 9 described, the present invention provides an operation method for a large-diameter and extra-long pile foundation concrete pouring hopper, including the following steps:

[0042] Step 1: The drill rig drills a hole and clears the hole;

[0043] Step 2: Detect the mud index;

[0044] Step 3: Lower the steel reinforcement cage;

[0045] Step 4: Four clamping and deviation-correcting integrated devices are in place, surrounding the four directions of the conduit 500 respectively, and the wheels 402 are locked; the laser rangefinders 408 measure distances, and then, according to the distance deviation between each laser rangefinder 408 and the conduit 500, the four clamping and deviation-correcting integrated devices cooperate with each other to perform jacking deviation correction; after the deviation correction is completed, the conduit 500 is slowly lowered. Before the conduit 500 is immersed in the pile foundation, two opposite clamping and deviation-correcting integrated devices clamp the conduit 500, and the other two clamping and deviation-correcting integrated devices hoist the second conduit 500 above the first conduit 500, and repeat the deviation correction operation; after the deviation correction is completed, the second conduit 500 is lowered until the interfaces are aligned; after the rotary recess 503 and the rotary protrusion 502 are fitted together, the assembly is completed; the clamping and deviation-correcting integrated device clamping the first conduit 500 releases the clamping jaws 407, and the two connected conduits 500 continue to be lowered. Before being immersed in the pile foundation, two opposite clamping and deviation-correcting integrated devices clamp the second conduit 500, and the other two clamping and deviation-correcting integrated devices lift the third conduit 500, and repeat the above operation;

[0046] Step 5: Perform secondary hole cleaning, and detect the mud index and sediment thickness again;

[0047] Step 6: Install the first lifting lug 101 of the hopper; lift the hopper and embed it into the sinking support; then remove the first lifting lug 101;

[0048] Step 7: Lift the sinking support with the hopper fixed above the last section of the conduit 500. Multiple clamping and deviation-correcting integrated devices cooperate with each other to perform jacking deviation correction on the position of the hopper, and slowly lower it until it is aligned and assembled with the pipe orifice of the conduit 500; after the assembly is completed, all the clamping and deviation-correcting integrated devices are withdrawn; continue to lower the sinking support until its bottom fits the ground;

[0049] Step 8: Calculate the initial concrete volume using the formula; then perform the initial concrete pouring according to the required volume; after the pouring is completed, measure the embedment depth, and then perform normal continuous pouring;

[0050] Among them, the initial concrete volume is calculated according to the following formula:

[0051]

[0052] In the formula, V is the initial concrete volume (m 3 );

[0053] Z1 is the pile hole diameter;

[0054] Z2 is the inner diameter of the conduit;

[0055] S1 is the distance between the bottom of the conduit for the initial concrete volume and the bottom of the pile hole (m)

[0056] S2 is the initial buried depth of the catheter (m)

[0057] S3 is the height (m) required for the concrete column in the conduit to balance the pressure outside the conduit (or mud) when the concrete in the pile hole reaches the buried depth;

[0058] S4 is the depth of water or mud in the hole (m);

[0059] Y1 is the mud density in the pile hole (kN / m 3 );

[0060] Y2 is the concrete mixture density (kN / m 3 );

[0061] Step 9: During normal continuous pouring, start the flow monitoring and adjusting device; make the concrete fall evenly and not too fast; if the flow sensor 204 measures that the concrete falls too fast, control the air pump 200 to properly inflate the airbag 205, thereby reducing the concrete flow in the conduit 500 and slowing down the concrete fall speed;

[0062] Step 10: Measure the buried depth and control the buried depth of the conduit 500 to be 2-6m; if it exceeds 6m, the conduit 500 needs to be removed; the crane lifts and sinks the bracket; pulls out the hopper and the conduit 500; at the same time, the clamping and correcting integrated device returns to the conduit 500 and clamps it; removes the bottom conduit 500, and then lowers it again for normal continuous pouring;

[0063] Step 11: Repeat the normal pouring and the removal of the conduit 500 until the pouring reaches the designed elevation; the construction is now completed.

[0064] The present invention also includes a large-diameter and ultra-long pile foundation concrete pouring hopper, such as Figure 1 As shown, the hopper includes a hopper barrel wall 100, a first lifting ear 101, a steel block 102, a first bolt 103, a raised steel block 104 and a nozzle 105; wherein, four steel blocks 102 are arranged at equal intervals along the circumferential direction on the upper side of the hopper barrel wall 100 through the first bolt 103, a number of raised steel blocks 104 are arranged along the circumferential direction on the side of the hopper barrel wall 100 and on the lower side of the steel block 102, and a number of first lifting ears 101 are welded to a number of steel blocks 102 respectively. The advantage of this arrangement is that after the lifting is completed, the steel block 102 and the first lifting ear 101 can be quickly disassembled, which is convenient for maintenance and reuse. In addition, an exhaust hole 106 with a diameter of about 10 mm is opened on the side of the nozzle 105 of the hopper to prevent blockage in the duct due to excessive air pressure.

[0065] like Figures 1 to 3As shown in the figure, the flow monitoring and adjustment device is arranged in the middle of the hopper nozzle 105 and includes an air pump 200, a perforated steel plate 201, a second bolt 202, a structural pipe 203, a flow velocity sensor 204, an airbag 205, and a ventilation pipe 206. The air pump 200 is installed on the outer wall of the hopper nozzle 105. The side of the air pump 200 is connected to the ventilation pipe 206, and the bottom is connected to the structural pipe 203. The ventilation pipe 206 passes through the perforated steel plate 201 and is connected to the airbag 205 arranged on the inner wall of the hopper nozzle 105. The perforated steel plate 201 is fixed to the outer wall of the hopper nozzle 105 by the second bolt 202. The flow velocity sensor 204 is arranged on the inner wall of the hopper nozzle 105 and is connected to the air pump 200 through the structural pipe 203.

[0066] The airbag 205 can be inflated and deflated through the air pump 200, so as to adjust the size of the internal space of the hopper nozzle 105, and then accurately control the concrete flow rate. The flow velocity sensor 204 can monitor the flow velocity of the concrete passing through the hopper nozzle 105 in real time and transmit the data to the cloud. After being calculated by the cloud, the air pump 200 is controlled to work through the structural pipe 203 to realize intelligent flow regulation.

[0067] As Figures 3 to 4 shown in the figure, the sinking support is in an overall shape of a rectangular frame structure and includes a support structure 300, a groove 301, a second lifting lug 302, a fixing steel plate 303, and a third bolt 304. Among them, the groove 301 is arranged in the middle of the strip structure of the support structure 300. The second lifting lug 302 is welded to the fixing steel plate 303, and the fixing steel plate 303 is fixed to the middle positions of the four corners of the support structure 300 by the third bolt 304.

[0068] The groove 301 is mutually engaged with the raised steel block 104 on the side of the hopper, so as to realize the stable support of the sinking support for the hopper. This support method does not require additional welding and bolt connection, has the characteristics of convenient installation and quick disassembly, and significantly improves the construction efficiency and equipment flexibility.

[0069] As Figures 5 to 6 shown in the figure, the clamping and deviation correction integrated device includes a vehicle body 400, an axle 401, wheels 402, a chute 403, a slider 404, a telescopic rod 405, a mechanical shaft 406, a clamping jaw 407, and a laser rangefinder 408. The axle 401 passes through the vehicle body 400 and is installed below the vehicle body 400. The wheels 402 are rotatably installed on the axle 401. The chute 403 is arranged on the front side of the vehicle body 400. The slider 404 is slidably installed in the chute 403. The telescopic rod 405 is installed on the slider 404 and can realize telescopic movement. The mechanical shaft 406 is installed at the top of the telescopic rod 405. The clamping jaw 407 is fixed to the side of the mechanical shaft 406 for clamping the conduit 500. The laser rangefinder 408 is installed above the front end of the vehicle body 400 for measuring the distance in real time.

[0070] The jaw 407, in cooperation with the telescopic rod 405 and the slider 404, can move back and forth and slide up and down. Driven by the mechanical shaft 406, the jaw 407 can perform a clamping action, thereby achieving precise clamping of the conduit 500. Above the vehicle body 400, a laser rangefinder 408 is installed to measure the distance between the clamping and deviation correction integrated device and the conduit 500 or the hopper. By arranging the clamping and deviation correction integrated devices in multiple orientations of the conduit 500 and transmitting the ranging data to the cloud for calculation, and then controlling the pushing and pulling actions of the telescopic rod 405 through hydraulic pressure, the deviation correction function during the hoisting process of the conduit 500 and the hopper can be achieved, ensuring the accuracy and stability of the hoisting process. In addition, the top of the jaw 407 is designed as a smooth and flat plane, enabling it to not only clamp the conduit 500 but also play a role in lifting and deviation correction during the hoisting of the hopper, significantly enhancing the versatility and adaptability of the device.

[0071] As Figures 7 to 8 shown, the novel conduit 500 includes a conduit interface 501, a rotary convex 502, a rotary concave 503, and a sealing plate 504; the conduit interface 501 is provided at the end of the conduit 500, and the interfaces at both ends of the conduit 500 adopt a differential design: the upper conduit interface is provided with a rotary concave 503, the lower conduit interface is provided with a rotary convex 502 that matches the rotary concave 503, and the sealing plate 504 is provided between adjacent rotary concaves 503.

[0072] The rotary convex 502 and the rotary concave 503 can be mutually engaged by rotation, and with the limiting effect of the sealing plate 504, the tight connection of two sections of the conduit 500 can be achieved. This connection method has the characteristics of simple structure, quick operation, and convenient disassembly. In addition, rubber-based water-stop sealing materials are provided on the surfaces of the rotary concave 503 and the rotary convex 502, effectively avoiding the occurrence of concrete leakage and ensuring the sealing and reliability of the connection.

[0073] The present invention is not limited to the above best implementation manner. Anyone can obtain various other forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to the present application, it falls within the protection scope of the present invention.

Claims

1. Operating method of concrete pouring hopper for large-diameter and extra-long pile foundation, characterized in that, The following steps are involved: Step 1: Drilling and cleaning the hole; Step 2: Detect mud indicators; Step 3: Lower the steel cage; Step 4: A plurality of integrated clamping and deflection correction devices are in place to respectively surround the catheter (500) at multiple positions, and the laser rangefinder (408) performs distance measurement. Then, according to the distance deviation between each laser rangefinder (408) and the catheter (500), the plurality of integrated clamping and deflection correction devices cooperate with each other to perform lifting and deflection correction; After the deviation correction is completed, the guide tube (500) is slowly lowered. Before the guide tube (500) is immersed in the pile foundation, two opposing integrated clamping and deviation correction devices clamp the guide tube (500), and the second guide tube (500) is hoisted above the first guide tube (500) through the remaining integrated clamping and deviation correction devices, and the deviation correction operation is repeated, and subsequent guide tubes (500) are lowered in sequence; Step 5: Perform secondary hole cleaning and test the mud index and sediment thickness again; Step 6: Lift the hopper and embed it into the sinking bracket; Step 7: Lift the sinking bracket with the hopper fixed to the top of the last section of the conduit (500), and use multiple clamping and correction integrated devices to lift and correct the position of the hopper and lower it until it is aligned with the pipe opening of the conduit (500) for assembly; after the assembly is completed, continue to lower the sinking bracket until its bottom is in contact with the ground; Step 8: Calculate the volume of the first concrete seal; then pour the first concrete seal according to the required volume; after pouring, measure the burial depth, and then continue pouring normally; Step 9: During normal continuous perfusion, start the flow monitoring and adjustment device; If the flow rate sensor (204) measures that the falling speed is too fast, the flow rate of concrete in the conduit (500) is reduced; Step 10: measuring the buried depth and controlling the buried depth of the conduit (500); when the buried depth exceeds the set depth, the conduit (500) needs to be removed; Step 11: Repeat the normal pouring and the removal of the conduit (500) until the pouring reaches the designed elevation; the construction is now completed.

2. The operating method of the large-diameter and super-long pile foundation concrete pouring hopper according to claim 1, characterized in that: In step six, the hopper includes a hopper barrel wall (100) and a steel block (102); a plurality of steel blocks (102) are arranged at equal intervals along the circumferential direction on the upper side of the hopper barrel wall (100) by means of a first bolt (103); a plurality of raised steel blocks (104) are arranged along the circumferential direction on the side of the hopper barrel wall (100) and on the lower side of the steel block (102); a plurality of first lifting ears (101) are respectively arranged on the plurality of steel blocks (102); and an exhaust hole (106) is opened on the side of the hopper mouth (105).

3. The operating method of the large-diameter and super-long pile foundation concrete pouring hopper according to claim 2, characterized in that: In Step Nine, the flow monitoring and adjusting device is arranged in the middle of the nozzle (105), and includes an air pump (200), a perforated steel plate (201), and an airbag (205); the air pump (200) is installed on the outer wall of the nozzle (105), the side of the air pump (200) is connected to a ventilation pipe (206), and the bottom is connected to a structural pipe (203); the ventilation pipe (206) passes through the perforated steel plate (201) and is connected to the airbag (205) arranged on the inner wall of the nozzle (105); the perforated steel plate (201) is fixed to the outer wall of the nozzle (105) by a second bolt (202), and a flow velocity sensor (204) is arranged on the inner wall of the nozzle (105) and is connected to the air pump (200) through the structural pipe (203).

4. The operating method of the large-diameter and extra-long pile foundation concrete pouring hopper according to claim 2, characterized in that: In Step Six, the sinking support is in an overall shape of a square frame structure, and includes a support structure (300), a second lifting lug (302), and a fixing steel plate (303); a groove (301) is arranged in the middle of the strip structure of the support structure (300); the second lifting lug (302) is arranged on the fixing steel plate (303), and the fixing steel plate (303) is fixed to the middle positions of the four corners of the support structure (300) by a third bolt (304).

5. The operating method of the large-diameter and extra-long pile foundation concrete pouring hopper according to claim 4, characterized in that: The groove (301) is mutually engaged with the raised steel block (104) on the side of the hopper.

6. The operating method of the large-diameter and extra-long pile foundation concrete pouring hopper according to claim 1, characterized in that: In Step Four, the clamping and deviation correction integrated device includes a vehicle body (400) and an axle (401); the axle (401) penetrates through the vehicle body (400) and is installed below the vehicle body (400), and wheels (402) are rotatably installed on the axle (401); a chute (403) is arranged on the front side surface of the vehicle body (400), and a slider (404) is slidably installed in the chute (403); a telescopic rod (405) is installed on the slider (404) and can perform telescopic actions; a mechanical shaft (406) is installed at the top of the telescopic rod (405), and a clamping jaw (407) is fixed to the side of the mechanical shaft (406) for clamping the conduit (500); a laser rangefinder (408) is installed above the front end of the vehicle body (400) for real-time distance measurement.

7. The operating method of the large-diameter and extra-long pile foundation concrete pouring hopper according to claim 1, characterized in that: In Step Four, the conduit (500) includes a conduit interface (501) and a sealing plate (504); the conduit interface (501) is arranged at the end of the conduit (500), and the interfaces at both ends of the conduit (500) adopt a differential design: a rotary concave (503) is arranged at the upper conduit interface, a rotary convex (502) matching the rotary concave (503) is arranged at the lower conduit interface, and the sealing plate (504) is arranged between two adjacent rotary concaves (503).

8. The operating method of the large-diameter and super-long pile foundation concrete pouring hopper according to claim 1, characterized in that: In Step Eight, the first sealed concrete volume is calculated through the first sealed concrete volume calculation formula, and the first sealed concrete volume calculation method is as follows: In the formula, V is the first sealed concrete volume; Z1 is the pile hole diameter; Z2 is the inner diameter of the conduit; S1 is the distance between the bottom end of the conduit for sealing concrete volume and the bottom of the pile hole; S2 is the initial embedding depth of the conduit; S3 is the height required for the concrete column in the conduit to balance the pressure outside the conduit (or mud) when the concrete in the pile hole reaches the embedding depth; S4 is the depth of water or mud in the hole; Y1 is the specific weight of the mud in the pile hole; Y2 is the specific weight of the concrete mixture.

9. A concrete pouring hopper for large-diameter and extra-long pile foundations, characterized in that: Use it according to the operation method of the large-diameter and extra-long pile foundation concrete pouring hopper described in any one of claims 1-8.

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