Screw-in type environment-friendly steel pipe pile with tip blades and construction method

Abstract

The invention discloses a screw-in type environment-friendly steel pipe pile with tip blades and a construction method. The screw-in type environment-friendly steel pipe pile comprises a steel pipe pile body, a pile cap fixed to the steel pipe pile body and a spinning driving device driving the steel pipe pile body to rotate downwards, and the pile cap is installed at the pile back position of the steel pipe pile body and driven by the spinning driving device; a tip blade is mounted at the pile tip position of the steel pipe pile, covers the pile tip position of the steel pipe pile, and comprises two semi-doughnut-shaped steel plates; the two semi-doughnut-shaped steel plates are arranged on the periphery of the steel pipe pile in a V shape; the steel plates with the semi-doughnut-shaped tip blades are arranged on the periphery of the steel pipe pile and welded in a V-shaped intersection mode, so that a wider stress surface can be formed when the pile tip enters a soil layer, the pressure of a soil body is dispersed, the soil body is effectively broken through through the gradual rotary cutting effect, the penetrating power of the pile is improved, and the construction efficiency is improved. And the situation that the construction speed is reduced or the pile body deflects due to the fact that large resistance occurs when the pile tip of the steel pipe pile makes contact with a hard soil layer is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a screw-in environmentally friendly steel pipe pile with pointed blades and a construction method. Background Art

[0002] As a common foundation engineering material, steel pipe piles are widely used in the construction of buildings, bridges, ports and other important facilities. The screw-in construction method of steel pipe piles has gradually become a mainstream pile foundation construction method due to its advantages such as high construction efficiency and small environmental disturbance. However, traditional screw-in steel pipe piles have certain technical bottlenecks, especially in terms of penetration under different soil conditions, screw-in efficiency and disturbance to the surrounding soil, and have not yet achieved the best results.

[0003] Traditional screw-in steel pipe piles mostly use ordinary steel pipe pile tip blades with relatively simple tip designs, usually flat or spiral blades. These designs often cannot provide sufficient penetration in loose soil or hard soil layers. Especially when encountering harder soils such as clay or gravel layers, the efficiency of screw-in piles is low, and greater cutting force is required during construction, which may even lead to compaction and accumulation of soil, thus affecting the construction progress and the quality of the pile foundation. In addition, the blades of traditional designs may also cause greater soil disturbance, leading to damage to the surrounding environment and increasing the difficulty and cost of construction.

[0004] In order to solve these problems, a screw-in environmentally friendly steel pipe pile with a tip blade is proposed. The design aims to improve the penetration of the steel pipe pile in various soil layers, reduce the cutting force required during the screw-in process, and reduce the disturbance to the surrounding soil, thereby achieving the dual goals of environmental protection and efficient construction. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a screw-in environmentally friendly steel pipe pile with pointed blades and a construction method.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a screw-in environmentally friendly steel pipe pile with a pointed blade, comprising: a steel pipe pile, a pile cap fixed to the steel pipe pile, and a spinning drive device for driving the steel pipe pile to rotate downward,

[0007] The pile cap is installed at the back of the steel pipe pile, and the pile cap is driven to rotate by the spinning drive device;

[0008] A tip blade is installed at the tip of the steel pipe pile, and the tip blade covers the tip of the steel pipe pile. The tip blade includes: two semi-donut-shaped steel plates; the two semi-donut-shaped steel plates are welded to the lower end of the tip of the steel pipe pile in a V-shaped intersection at the outer periphery of the steel pipe pile.

[0009] In a preferred embodiment of the present invention, a plurality of grooves are provided on the outer periphery of the pile back of the steel pipe pile, and the grooves are arranged in a rectangular shape.

[0010] In a preferred embodiment of the present invention, a fixing assembly is arranged in the pile cap, and the fixing assembly comprises: a rotating disk, a worm wheel coaxially fixed with the rotating disk, a worm meshing with the worm wheel, and a fixing block fixed with the groove of the steel pipe pile; a connecting column is fixedly connected to one side of the fixing block, and an end of the connecting column away from the fixing block passes through the pile cap and is slidably connected with the pile cap;

[0011] The rotating disk is installed inside the pile cap and is rotatably connected to the pile cap. A spiral groove is arranged on the rotating disk. A driving block is installed in the spiral groove. The driving block is fixedly connected to the connecting column.

[0012] In a preferred embodiment of the present invention, a plurality of the fixing blocks and the grooves are provided, and they correspond one to one.

[0013] In a preferred embodiment of the present invention, the cross section of the fixing block is gradually changed, and the cross section of the fixing block on the side in contact with the connecting post is gradually reduced toward the side away from the connecting post.

[0014] In a preferred embodiment of the present invention, one of the ends of the semi-donut-shaped steel plate protruding forward is provided with a first incision and a second incision, the first incision is close to the inner diameter position of the semi-donut-shaped steel plate, the angle of the first incision is 20°-25°, the angle of the second incision is 30°-35°, the ratio of the length of the first incision to the second incision is 1-1.25:2, and the first incision and the second incision are provided with inclined blades.

[0015] In a preferred embodiment of the present invention, the ratio of the diameter of the semi-donut-shaped steel plate to the diameter of the steel pipe pile is 1.5-2:1, and the semi-donut-shaped steel plate welded to the lower end of the tip of the steel pipe pile in a V-shaped intersection has an angle of 7°-10° with the horizontal direction.

[0016] In a preferred embodiment of the present invention, a plurality of internal teeth are disposed on both the inner wall and the outer wall of the steel pipe pile.

[0017] A construction method of a screw-in environmentally friendly steel pipe pile with a pointed blade, using the above-mentioned screw-in environmentally friendly steel pipe pile with a pointed blade, comprises the following steps:

[0018] Step S1: Conduct geological survey on the construction area to understand the soil information of the construction area, confirm the soil type, and determine the piling location;

[0019] Step S2, mounting the steel pipe pile with the pile tip blade installed at the end on the spinning drive device of the spinning pile machine and aligning it with the piling position;

[0020] Step S3, the spinning drive device drives the steel pipe pile to rotate and drill vertically downward into the formation, and the screwing depth of the steel pipe pile is monitored in real time until the steel pipe pile reaches the designed depth of the steel pipe pile, and the steel pipe pile is separated from the spinning drive device;

[0021] Step S4, judging whether the depth of the pile foundation reaches the design depth, if it reaches the design depth of the pile foundation, the construction of the steel pipe pile is completed;

[0022] Step S5, if the designed depth of the pile foundation is not reached, the pile is continued, the steel pipe pile is matched and installed on the spinning drive device of the spinning pile machine, and the pile driving position is aligned, the spinning drive device drives the steel pipe pile to rotate vertically downward into the formation, and the screwing depth of the steel pipe pile is monitored in real time until the steel pipe pile reaches the designed depth of the steel pipe pile, and the steel pipe pile is separated from the spinning drive device;

[0023] Step S6, judging whether the depth of the pile foundation reaches the design depth, if it reaches the design depth of the pile foundation, completing the construction of the steel pipe pile, if it does not reach the design depth of the pile foundation, repeating step S5 until the design depth of the pile foundation is reached.

[0024] In a preferred embodiment of the present invention, in step S1, the soil quality information includes: distribution and thickness of soil layers, physical properties of soil, and mechanical properties of soil; soil types include: clay, sand, hard soil, and rock.

[0025] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0026] (1) The present invention provides a screw-in environmentally friendly steel pipe pile with a tip blade. The tip blade is a semi-donut-shaped steel plate arranged on the outer periphery of the steel pipe pile and welded in a V-shaped intersection. This enables the pile tip to form a wider force-bearing surface when entering the soil layer, thereby dispersing the pressure of the soil. At the same time, the pile tip can gradually cut into the soil layer, reducing the resistance of each layer of soil. Through the gradual rotational cutting action, the soil is effectively broken through, the penetration force of the pile is improved, and the situation in which the pile tip of the steel pipe pile encounters greater resistance when contacting the hard soil layer, resulting in a slow construction speed or pile body deflection, is avoided.

[0027] (2) The present invention provides an environmentally friendly screw-in steel pipe pile with a tip blade. The tip blade is a semi-donut-shaped steel plate arranged on the outer periphery of the steel pipe pile and welded in a V-shaped intersection. The soil pressure can be evenly distributed to multiple areas of the pile tip, thereby effectively improving the friction and adhesion between the pile end and the soil, thereby enhancing the bearing capacity of the pile foundation. At the same time, the uniform distribution of force helps to reduce the deformation or pull-out of the pile body caused by excessive local force on the pile end. In soft soil layers and loose layers, the optimized distribution of bearing capacity can better ensure the stability of the pile foundation.

[0028] (3) The present invention arranges the tip blades in the form of semi-donut-shaped steel plates on the outer periphery of the steel pipe pile and welds them in a V-shaped intersection. The tip blades are pushed forward layer by layer to avoid large-scale soil compaction during the initial cutting, which helps to reduce the problem of water level rise and settlement caused by over-compacted soil in areas with high groundwater levels. At the same time, the cutting ability and inclined blade design of the tip blades can gradually reduce the soil, avoid directly pushing the soil layer, reduce soil disturbance during the screwing process, avoid uneven settlement caused by construction, and ensure the safety of surrounding structures.

[0029] (4) The present invention increases the contact area of ​​the pile end and improves the end bearing capacity by setting the diameter of the tip blade to be 1.5-2 times larger than that of the steel pipe pile. In the sand and gravel layer, this large-diameter blade can disperse the pressure, reduce the local squeezing of the soil at the pile end, and avoid the reduction of bearing capacity. At the same time, during the screwing process, the tip blade disturbs the surrounding soil through its special geometric shape to form a dense area, thereby increasing the friction resistance on the pile side and further enhancing the overall bearing capacity of the pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of a fixing assembly according to a preferred embodiment of the present invention;

[0033] Figure 3 is a schematic structural diagram of a tip blade of a preferred embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of a tip blade of a second embodiment of the present invention;

[0035] In the figure: 1. steel pipe pile; 2. pile cap; 3. semi-donut-shaped steel plate; 4. groove; 5. rotating disk; 6. worm gear; 7. worm; 8. fixed block; 9. connecting column; 10. driving block; 11. internal teeth. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0040] Figure 1 , Figure 2 and Figure 3As shown, a screw-in environmentally friendly steel pipe pile with a pointed blade comprises: a steel pipe pile 1, a pile cap 2 fixed to the steel pipe pile 1, and a spinning drive device for driving the steel pipe pile 1 to rotate downward.

[0041] The pile cap 2 is installed at the pile back position of the steel pipe pile 1, and the pile cap 2 is driven to rotate by a spinning drive device;

[0042] A tip blade is installed at the tip of the steel pipe pile 1, and the tip blade covers the tip of the steel pipe pile 1. The tip blade includes: two semi-donut-shaped steel plates 3; the two semi-donut-shaped steel plates 3 are welded to the lower end of the tip of the steel pipe pile 1 in a V-shaped intersection at the outer peripheral part of the steel pipe pile 1.

[0043] The spinning drive device is specifically a motor. By fixing the output end of the motor and the axial center position of the pile cap 2 , the motor drives the pile cap 2 to rotate, thereby driving the steel pipe pile 1 to rotate.

[0044] Several steel pipe piles 1 are provided, among which a tip blade is installed at the end of the steel pipe pile 1 to be piled. The steel pipe pile 1 with the tip blade installed at the end is driven by a spinning drive device to rotate toward the piling position and press it down into the soil layer. When the length of the steel pipe pile 1 cannot reach the target depth of piling, the steel pipe pile 1 is welded to the steel pipe pile 1 entering the soil layer. Specifically, the prepared steel pipe pile 1 is lifted by a crane, and one end of the lifted steel pipe pile 1 is aligned with the end of the steel pipe pile 1 entering the soil layer to ensure that the axes of the two steel pipe piles 1 are at the same axis position, and the contact positions of the two steel pipe piles 1 are welded by a welding device to ensure the stability of the welding position.

[0045] In the first embodiment, the tip blade is composed of two semi-donut-shaped steel plates 3, and the two semi-donut-shaped steel plates 3 are welded to the lower end of the pile tip of the steel pipe pile 1 in a V-shaped intersection, so that the pile tip can form a wider force surface when entering the soil layer, disperse the pressure of the soil, and at the same time, the pile tip can gradually cut into the soil layer, reducing the resistance of each layer of soil. Through the gradual rotational cutting action, the soil is effectively broken through, the penetration force of the pile is improved, and the pile tip of the steel pipe pile 1 is prevented from encountering greater resistance when contacting the hard soil layer, resulting in a slow construction speed or a deflection of the pile body.

[0046] After the piling position is determined, the steel pipe pile 1 with a tip blade installed at the end is rotated and pressed down into the soil layer toward the piling position by a pile driver, and the pile cap 2 is driven to rotate by a spinning drive device. The pile cap 2 is fixed to the steel pipe pile 1, thereby driving the pile cap 2 to drive the steel pipe pile 1 to rotate, and the tip blade located at the tip of the steel pipe pile 1 rotates toward the piling position, and the tip blade of the pile tip gradually cuts into the soil layer, thereby entering the soil layer at the piling position, until the steel pipe pile 1 reaches the designed depth of the steel pipe pile 1, the steel pipe pile 1 is separated from the pile cap 2, and the prepared steel pipe pile 1 is lifted by a crane, and the lifted steel pipe pile 1 is lifted. One end of the pipe pile 1 is aligned with the end of the steel pipe pile 1 entering the soil layer to ensure that the axes of the two steel pipe piles 1 are located at the same axis position, and the contact positions of the two steel pipe piles 1 are welded by a welding device to ensure the stability of the welding position, and the pile cap 2 is fixed to the welded steel pipe pile 1, and the pile cap 2 is driven by a spinning drive device to rotate, and the steel pipe pile 1 is driven to move downward into the soil layer, and it is judged whether the depth of the pile foundation reaches the design depth. If it reaches the design depth of the pile foundation, the construction of the steel pipe pile 1 is completed. If it does not reach the design depth of the pile foundation, the pile is continued until the design depth of the pile foundation is reached.

[0047] Before the pile driver is operated, the anti-shake device needs to be fixed on the guide rail of the pile driver to prevent the pile body from shaking.

[0048] The end of the steel pipe pile 1 close to the soil layer is the pile tip, and the end of the steel pipe pile 1 away from the soil layer is the pile back.

[0049] In the present invention, a plurality of grooves 4 are provided on the outer periphery of the pile back of the steel pipe pile 1, and the grooves 4 are arranged in a rectangular shape.

[0050] A fixing assembly is arranged inside the pile cap 2, and the fixing assembly includes: a rotating disk 5, a worm wheel 6 coaxially fixed with the rotating disk 5, a worm 7 meshing with the worm wheel 6, and a fixing block 8 matched and fixed with the groove 4 of the steel pipe pile 1; a connecting column 9 is fixedly connected to one side of the fixing block 8, and an end of the connecting column 9 away from the fixing block 8 passes through the pile cap 2 and is slidably connected to the pile cap 2;

[0051] The rotating disk 5 is installed inside the pile cap 2 and is rotatably connected to the pile cap 2 . A spiral groove is provided on the rotating disk 5 . A driving block 10 is installed in the spiral groove. The driving block 10 is fixedly connected to the connecting column 9 .

[0052] The pile cap 2 has a structure that can reliably transmit the rotational driving force of the motor to the rotating metal accessories of the steel pipe pile 1. When the steel pipe pile 1 needs to be driven to rotate into the soil layer, the pile cap 2 needs to be fixed to the steel pipe pile 1. By putting the pile cap 2 on the pile back position of the steel pipe pile 1, the worm wheel 6 is driven to rotate by rotating the worm 7, and the worm wheel 6 is coaxially fixed with the rotating disk 5. The rotating disk 5 and the pile cap 2 are rotationally connected, so the rotating disk 5 and the worm wheel 6 rotate synchronously, and a vortex-shaped spiral groove is provided on the rotating disk 5. A driving block 10 that moves in cooperation with its thread is provided on one side of the spiral groove. The driving block 10 is fixed to the connecting column 9, and the connecting column 9 penetrates the pile cap 2 and slides. Therefore, during the rotation of the rotating disk 5, the spiral groove drives the driving block 10 to move toward the axial position of the rotating disk 5, thereby driving the fixed block 8 to enter the groove 4 of the steel pipe pile 1, so that the fixed block 8 cooperates with the groove 4, and the pile cap 2 and the steel pipe pile 1 are limited and fixed.

[0053] By utilizing the cooperation of the worm wheel 6 and the worm screw 7, the worm wheel 6 is driven by the worm screw 7 and the power is transmitted to the rotating disk 5. At the same time, the self-locking property ensures that the connection between the pile cap 2 and the steel pipe pile 1 is stable during the rotation. When the rotation stops, the worm wheel 6 and the worm screw 7 are automatically locked. Even if the pile cap 2 is subjected to external forces such as soil resistance or vibration of construction machinery, it can effectively prevent loosening or deviation.

[0054] The fixing block 8 cooperates with the groove 4 on the steel pipe pile 1 to limit the position, so that steel pipe piles 1 of different sizes can be clamped. There is no need to replace the entire driving device, and only the pile cap 2 fixing assembly needs to be readjusted, which is convenient for disassembly, transportation and storage, and helps to reduce handling costs and storage space requirements.

[0055] In the present invention, a plurality of fixing blocks 8 and grooves 4 are provided, and they correspond one to one.

[0056] The cross section of the fixing block 8 is gradually changed, and the cross section of the fixing block 8 on the side in contact with the connecting column 9 gradually decreases toward the side away from the connecting column 9 .

[0057] The gradual section design enables the fixing block 8 to be inserted into or removed from the groove 4 more smoothly during installation or removal, thereby reducing the resistance and stagnation caused by the contact surface being too vertical.

[0058] The gradual cross section allows the fixed block 8 to gradually transition its force when in contact with the groove 4, effectively reducing the local stress concentration phenomenon, improving the contact stability between the fixed block 8 and the groove 4, and avoiding deformation of the groove 4 or damage to the fixed block 8 due to excessive local pressure;

[0059] At the same time, the gradually changing cut surface can be gradually embedded into the groove 4 during the spinning process to form a tighter fit, thereby improving the stability and clamping force of the fixing block 8.

[0060] In the present invention, a first incision and a second incision are provided at the end portion protruding forward of one of the semi-donut-shaped steel plates 3, the first incision is close to the inner diameter position of the semi-donut-shaped steel plate 3, the angle of the first incision is 20°-25°, the angle of the second incision is 30°-35°, the length ratio of the first incision to the second incision is 1-1.25:2, and the first incision and the second incision are provided with inclined blade portions.

[0061] The inclined blade design can form a sharper cutting edge, which can effectively cut and crush the soil when the steel pipe pile 1 is screwed into the ground, reducing the soil resistance. The presence of the cutout enhances the penetration of the tip blade, making it smoother for the steel pipe pile 1 to enter the hard soil layer or gravel layer.

[0062] The inclined blade can guide the soil to disperse to both sides, avoiding soil accumulation at the front end of the steel pipe pile 1, thereby reducing the resistance during the screwing process. The incision design optimizes the rotary cutting path, allowing the steel pipe pile 1 to penetrate the stratum more efficiently.

[0063] At the same time, the cuts and edges reduce stress concentration at the front end of the blade by optimizing force distribution, reducing the risk of wear and damage, thereby extending the service life of the blade.

[0064] In the present invention, the ratio of the diameter of the semi-donut-shaped steel plate 3 to the diameter of the steel pipe pile 1 is 1.5-2:1, and the semi-donut-shaped steel plate 3 is welded to the lower end of the pile tip of the steel pipe pile 1 in a V-shaped intersection, and the angle between the semi-donut-shaped steel plate 3 and the horizontal direction is 7°-10°.

[0065] It helps to increase the contact area between the pile end and the soil layer, thereby improving the bearing capacity of the pile end, especially in loose or soft soil layers, which can effectively disperse the pressure applied to the pile body and enhance the stability of the pile foundation.

[0066] The large-diameter tip blade can disperse the pressure applied to the pile tip to a larger soil area, avoiding excessive soil compaction or blockage at the pile tip, reducing soil accumulation or squeezing at the pile tip, and helping to maintain the stability of the soil layer, especially in aquifers or loose layers, to avoid excessive disturbance.

[0067] Before construction, the following preparations should be made: clear intermediate obstacles; maintain the construction ground; measure, display, and confirm the standard height of the pile core; check the construction machinery;

[0068] After the steel pipe pile 1 starts to rotate and penetrate, it should be penetrated slowly immediately while paying attention to the deviation of the steel pipe pile 1; in addition, the vertical accuracy of the steel pipe pile 1 should be checked at any time, and full attention should be paid to the verticality. When the crawler pile driver is working, the steel pipe pile 1 should be fixed with a stopper until the pile tip part penetrates about 1-4m from the ground.

[0069] Specifically, the following matters should be noted for rotary penetration operations: ensure the vertical accuracy of the nail; check the penetration at any time; strictly control the torque within the limit torque specified by the steel pipe material and size; apply thrust, inhibit penetration, and reverse rotation when necessary; use measuring instruments to record the load current or rotation pressure (oil pressure);

[0070] In order to protect the health of the steel pipe pile 1 and ensure that the torque does not exceed the limit torque of the pile body, usually, considering the rapid rise of torque, the torque less than the limit torque is defined as the management torque, and when approaching the management torque, it should be performed very carefully, that is, when the torque approaches the limit torque, the penetration of the steel pipe pile is suppressed; the load current and load oil pressure corresponding to the limit torque are calculated in advance and transmitted to the machine driver; in addition, a control device can be used to automatically stop the operation or no longer increase the operation when the output of the steel pipe pile 1 rotation motor or hydraulic pump reaches a predetermined torque;

[0071] Its limiting torque is the smaller of the torque determined by the allowable stress of the thinnest steel pipe (limiting torque of the steel pipe) and the torque determined by the strength of the welded portion of the steel pipe tip and the tip blade (limiting torque of the welded portion).

[0072] The torque determined by the allowable shear stress of the steel pipe (the ultimate torque of the steel pipe) is calculated as follows: Where, T represents the ultimate torque of the steel pipe (kN·m), d1 represents the outer diameter of the steel pipe (mm), and d2 represents the inner diameter of the steel pipe (mm). It indicates the short-term allowable shear stress (N / mm2), and F represents the basic strength of the steel pipe ((N / mm2).

[0073] During the construction process, the load current in the electric motor, the load hydraulic value in the hydraulic motor, and the pile tip depth are measured and converted into rotational torque. The rotational torque varies according to the hardness of the foundation, so it is used to confirm the supporting layer. However, the rotational torque is affected by the amount of penetration after the pile rotates one circle (penetration speed), etc. Therefore, the penetration amount and penetration time per rotation that are difficult to measure in addition to the rotational torque are measured as needed. Regarding the measurement interval and measurement interval, in the test, it is carried out every 1m interval for the first 2m of the supporting layer, and every 20cm interval thereafter. If the penetration amount per rotation is large, it can be greater than 20cm;

[0074] As a management index for determining the depth of the upper end of the support layer, the torque, the penetration amount per rotation, and the hardness index among the hardness index are used as basic indicators, however, when it can be confirmed that it can be determined only by the torque, the torque can also be used, and in addition, other effective indicators such as the penetration time and the integral torque (which is the product of the rotation torque value during construction and the construction time, and can be an index value closer to the ground stiffness than the instantaneous rotation torque value during construction, in order to evaluate the energy required for rotating a unit section per unit time for construction);

[0075] Using the construction records compiled after the test and other construction, the management index value for determining the depth of the upper end of the support layer is set according to the following method:

[0076] 1. When the test position is very close to the drilling position, read the management index value at the upper depth of the support layer in the soil column diagram as the management index value for this construction;

[0077] 2. When the test position is slightly far from the drilling position, or when there is a difference between the control index change point and the upper depth of the supporting layer in the soil column diagram, read the control index value of the depth with a larger change near the upper depth of the supporting layer in the soil column diagram, and use it as the control index value for this construction.

[0078] In summary, the performance of the tip blades was evaluated experimentally.

[0079] Experimental example

[0080] 1. Purpose of the experiment

[0081] Verify the effectiveness of the ratio of the design diameter of the tip blade to the diameter of the steel pipe pile 1 of 1.5-2:1, the V-shaped intersection welding form, with inclined blades and cuts, and analyze its impact on the following performance indicators:

[0082] 1. Screwing efficiency: Screwing depth per unit time;

[0083] 2. Soil penetration and cutting force requirements;

[0084] 3. Soil disturbance degree: the range of disturbance around the pile tip;

[0085] 4. Wear rate of tip blades.

[0086] 2. Experimental Preparation

[0087] 1. Steel pipe pile 1 and tip blade sample:

[0088] The tip blades with different diameters are 1.5 times, 1.75 times and 2 times the diameter of the steel pipe pile.

[0089] Comparison sample: Conventional blade without beveled edge or cutout.

[0090] 2. Pile driver: equipped with torque sensor and depth sensor.

[0091] 3. Geotechnical test box: size: 3m×3m×2m, filled with different types of soil layers: loose sand, clay, and gravel.

[0092] 4.Soil disturbance monitoring equipment: laser scanner.

[0093] 5. Wear test equipment: Use metal surface analyzer to measure the degree of blade wear.

[0094] 3. Experimental steps

[0095] Step 1: Prepare the soil environment

[0096] 1. Lay three typical soil layers in the geotechnical test box:

[0097] Layer A: loose sand, thickness 0.5m.

[0098] Layer B: clay soil, thickness 0.8m.

[0099] Layer C: Gravel layer, thickness 0.7m.

[0100] 2. Measure the density, moisture content and shear strength of each layer of soil.

[0101] Step 2: Experimental and control groups

[0102] 1. Experimental group:

[0103] Equipped with tip blades with diameters of 1.5, 1.75 and 2 times the diameter of the steel pipe pile 1 respectively.

[0104] Tip blade design includes: V-shaped weld, angled edge and cutout.

[0105] 2. Control group:

[0106] A conventional blade with a spiral tip is used and is wound around the outer circumference of the steel pipe pile 1 .

[0107] Step 3: Spin-in Experiment

[0108] 1. Record the penetration depth and time of each group of samples in the three soil layers, and calculate the penetration efficiency per unit time.

[0109] 2. Use a torque sensor to measure the average cutting force during the screw-in process.

[0110] 3. Repeat the test three times and take the average value.

[0111] Step 4: Soil disturbance analysis

[0112] A laser scanner was used to record the soil distribution around the pile tip after screwing in, and to analyze the disturbance range and uniformity.

[0113] Step 5: Wear Test

[0114] After completing the screw-in experiment, the surface wear rate and edge blunting of the tip blade were measured.

[0115]

[0116] In summary, by comparing experimental groups 1-3, it can be concluded that the larger the size of the tip blade, the better its performance. However, the blade in experimental group 2 ensures a sufficiently large contact area to effectively disperse the pressure, which can quickly cut into the soil layer without excessively disturbing the surrounding soil. However, as the size of the blade increases, its performance decreases. This is mainly because the blade size is too large. Although it can provide a larger contact surface, it will lead to a greater cutting force requirement in harder or denser soil layers such as gravel layers, thereby increasing the difficulty of screwing in. Under a larger contact area, the steel pipe pile 1 needs to overcome more soil friction and resistance, resulting in an increase in screwing time. Oversized blades may also cause excessive compaction or uneven cutting of local soil, thereby increasing the disturbance range and wear.

[0117] Moreover, a blade that is too large may over-cut the soil layer, causing excessive accumulation or compaction of the soil at the pile tip, which in turn causes a larger disturbance range. Especially in the gravel layer, an excessively large contact area may not be able to successfully break through the hard soil layer, increasing the rotation resistance and disturbing the soil layer structure.

[0118] By comparing the experimental group and the control group, it can be concluded that the tip blade in the experimental group has the best performance. The tip blade in the experimental group adopts a V-shaped intersecting welding design with an inclined blade and a cut, while the tip blade of the control group is a spiral blade wrapped around the outer periphery of the steel pipe pile 1. The V-shaped intersecting welding design provides a larger cutting area, which can better disperse the soil and reduce resistance by gradually cutting into the soil layer. The V-shaped welding helps the blade form a wider force surface, which can effectively disperse the soil pressure and reduce the local pressure at a single point, so that the pile tip can penetrate the soil layer more easily.

[0119] The setting of the inclined blade and the cut makes the tip blade sharper and can effectively cut the soil and reduce the resistance of the soil, especially in harder or sticky soil layers. The inclined blade of the cut further enhances the penetration of the blade, helps to guide the soil to disperse to both sides, avoids the accumulation of soil in front of the pile tip, and improves the screw-in efficiency.

[0120] For the spiral blades in the control group, in the hard soil layer, the spiral blades are prone to cause excessive soil accumulation, increasing the resistance to screwing in, which is similar to "screwing into" the soil layer instead of cutting the soil layer. This may lead to insufficient cutting and increase the resistance of the pile tip; and the relatively simple design of the spiral blades fails to effectively disperse the soil pressure and guide the movement of the soil, causing greater soil disturbance, and is prone to local stress concentration when screwing in, resulting in higher cutting force requirements.

[0121] The tip blades in the experimental group can make the soil easier to cut and disperse through the V-shaped and cut design, thereby reducing the resistance during the screw-in process and increasing the screw-in speed. The blade design enables the pile tip to penetrate different types of soil layers more quickly, especially hard soil layers or clay layers.

[0122] The spiral blades in the control group may generate greater friction and resistance during the screw-in process due to design limitations, especially in harder or compacted soil layers, resulting in lower screw-in efficiency.

[0123] The tip blade design of the experimental group optimized the cutting path and reduced the resistance of the soil layer. The V-shaped intersecting tip, together with the inclined blade and the incision, reduced the resistance of the soil layer, resulting in smaller cutting force requirements and lower torque during the screw-in process, thereby improving construction efficiency.

[0124] However, due to design reasons, the spiral blade of the control group could not effectively reduce the resistance of the soil layer. During the screwing process, a larger cutting force was required to break through the soil layer, resulting in greater torque and resistance.

[0125] The tip blade design in the experimental group can effectively disperse the soil pressure and avoid excessive accumulation of soil in front of the pile tip. The cutout and inclined blade design can disperse the soil to both sides, reduce soil accumulation, and thus reduce the range of soil disturbance.

[0126] The spiral blade design of the control group usually causes greater soil disturbance, especially in loose soil layers. The rotation of the spiral blade may cause compaction or accumulation of the surrounding soil, increase the disturbance range, and reduce construction accuracy.

[0127] In summary, Experimental Group 2 is the optimal solution of the present invention.

[0128] Embodiment 2, as Figure 4 As shown, there are several tip blades evenly distributed on the periphery of the steel pipe pile, and the tip blades include: two semi-donut-shaped steel plates; the two semi-donut-shaped steel plates are welded to the lower end of the pile tip position of the steel pipe pile 1 in a V-shaped intersection at the periphery of the steel pipe pile 1, wherein a first incision and a second incision are provided at the front protrusion position of the semi-donut-shaped steel plate, the first incision is close to the inner diameter position of the semi-donut-shaped steel plate, the angle of the first incision is 20°-25°, the angle of the second incision is 30°-35°, the ratio of the length of the first incision to the second incision is 1-1.25:2, and the first incision and the second incision are provided with inclined blades.

[0129] A plurality of internal teeth 11 are arranged on the inner wall and the outer wall of the steel pipe pile, which are used to break the hard objects in the pile body in coordination with the rotation of the steel pipe pile during the rotation of the steel pipe pile, thereby reducing the resistance caused by the hard objects to the pile body of the steel pipe pile;

[0130] It should be noted that, during use, the inner teeth 11 can be evenly distributed on the inner and outer walls of the steel pipe pile, and the inner teeth are evenly spaced in the circumferential and radial directions. Each tooth is relatively evenly stressed, and the force transmission path is consistent, which has higher transmission efficiency and stability, and is suitable for long-term continuous operation. The uniform distribution of the inner teeth reduces mechanical vibration during operation.

[0131] Moreover, the inner teeth 11 can be irregularly distributed on the inner and outer walls of the steel pipe pile. The irregular distribution can enhance the penetration ability of the teeth in certain specific directions. It is suitable for heterogeneous soil layers or soil containing obstacles. The size or distribution density of the teeth can be enhanced in certain specific positions, which is helpful for efficiently cutting hard soil layers or decomposing blocky soil. The distribution and shape of the inner teeth can be adjusted according to the needs of the scene.

[0132] The semi-donut-shaped steel plate is set as a semi-circular ring, and the tip blades formed by the semi-donut-shaped steel plates intersecting in a V shape on the outer peripheral part of the steel pipe pile 1 are set as an opening. The opening setting allows the soil to have more distribution space at the pile tip, which can help the soil layer to be effectively cut and dispersed, reduce the accumulation of soil at the pile tip, avoid the formation of "blockage" of soil, and reduce the resistance during the screwing process. The opening position is connected with the inside of the steel pipe pile, which helps to reduce the compaction of the soil, especially in soft soil, loose soil layers and other soil types, and helps to screw the pile body more smoothly.

[0133] It should be noted that the semi-donut-shaped steel plate is fixed to the steel pipe pile by welding, and the semi-donut-shaped steel plate has multiple models. Before piling, according to the structure of the soil layer, a suitable semi-donut-shaped steel plate is selected and welded on the steel pipe pile;

[0134] For example, when the soil layer at the piling position is a loose soil layer, a soft soil layer, or a clay soil layer, the semi-donut-shaped steel plate is changed to a semi-circular steel plate, so that there is no opening between the tip blades formed by the two semi-circular steel plates. When the tip blades are used for piling, the soil layer at the tip of the pile can be pushed to the outside of the pile body to achieve soil layer compression, thereby reinforcing the strength of the soil layer outside the pile body, avoiding the shaking of the pile body due to the loose soil layer, and improving the stability of the pile body.

[0135] When piling in hard soil layer, gravel layer and rock soil layer, the tip blades composed of two semi-donut-shaped steel plates are used, and the tip blades composed of two semi-donut-shaped steel plates are open. When using this tip blade for piling, the tip blade will crush the hard soil layer and hard objects in the soil layer. In the process of drilling the steel pipe pile body downward, the hard objects in the soil layer will enter the inner wall of the pile body through the opening position of the tip blade, thereby reducing the resistance of piling, further reducing the loss of the tip blade, and improving the speed of piling;

[0136] When using different types of tip blades for work, when piling in a hard soil layer, it is necessary to detect in advance the number of hard soil layers at the piling position. If there are two hard soil layers at the piling position, two tip blades are welded on the steel pipe pile. The tip blade located at the tip of the steel pipe pile is the first section, and the tip blade located in the middle of the steel pipe pile body is the second section. The ratio of the diameter of the semi-donut-shaped steel plate in the second section tip blade to the diameter of the semi-donut-shaped steel plate in the first section tip blade is 1.2-1.25:1, so that the second section tip blade is slightly larger;

[0137] The configuration of installing two tip blades on a steel pipe pile can provide a larger cutting area, which helps to quickly cut into the soil layer. The tip blades in the first section will continuously break two layers of hard soil, and the tip blades in the second section will break the first layer of hard soil broken by the tip blades in the first section; the two tip blades provide a larger cutting surface, which can disperse the pressure applied to the pile tip in the loose soil layer, improve the bearing capacity of the pile, and reduce the wear of a single tip blade. The larger contact area helps the pile tip to cut better, reduce the screw-in resistance, increase the screw-in speed, and ensure the efficiency of construction. Among them, the second section of the tip blade has a larger diameter and can provide a larger support area in the hard soil layer, thereby improving the stability of the pile body during and after construction. This helps to reduce the risk of lateral displacement or tilt of the pile body, and the slightly larger second section of the tip blade can effectively disperse the vertical and horizontal stresses generated by the pile driving process, reduce the stress concentration on a single tip blade, and reduce the risk of damage to the pile tip or structure;

[0138] The material of the semi-donut-shaped steel plate in the tip blade is HBL385B (550N / mm2 grade TMCP steel for building structures, certification number MSTL-0130, MSTL-0131).

[0139] It should be noted that metal grid bars are welded on the semi-donut-shaped steel plates in the tip blades to increase the surface hardness of the semi-donut-shaped steel plates, reduce the wear and passivation of the tip blades during the screw-in process, and thus extend the service life of the blades. At the same time, the structure of the metal grid bars can effectively disperse the friction acting on the surface of the tip blades, reduce the concentrated area of ​​wear, and reduce the damage to the tip blades caused by excessive wear.

[0140] It is worth mentioning that in order to increase the speed of construction, the tip blades can be welded to the short piles in advance. When piling is required, the short piles welded with the tip blades are transferred to the construction position, and the short piles are welded to the steel pipe piles, thereby increasing the speed of construction.

[0141] A construction method of a screw-in environmentally friendly steel pipe pile with a pointed blade, using the above-mentioned screw-in environmentally friendly steel pipe pile with a pointed blade, comprises the following steps:

[0142] Step S1: Conduct geological survey on the construction area to understand the soil information of the construction area, confirm the soil type, and determine the piling location;

[0143] Step S2, mounting the steel pipe pile 1 with the pile tip blade installed at the end on the spinning drive device of the spinning pile machine, and aligning it with the piling position;

[0144] Step S3, the spinning drive device drives the steel pipe pile 1 to rotate and drill vertically downward into the stratum, and monitors the screwing depth of the steel pipe pile 1 in real time until the steel pipe pile 1 reaches the designed depth of the steel pipe pile 1, and separates the steel pipe pile 1 from the spinning drive device;

[0145] Step S4, judging whether the depth of the pile foundation reaches the design depth, if it reaches the design depth of the pile foundation, the construction of the steel pipe pile 1 is completed;

[0146] Step S5, if the designed depth of the pile foundation is not reached, the pile is continued, the steel pipe pile 1 is mounted on the spinning drive device of the spinning pile machine, and the pile driving position is aligned, the spinning drive device drives the steel pipe pile 1 to rotate vertically downward into the formation, and the screwing depth of the steel pipe pile 1 is monitored in real time until the steel pipe pile 1 reaches the designed depth of the steel pipe pile 1, and the steel pipe pile 1 is separated from the spinning drive device;

[0147] Step S6, determine whether the depth of the pile foundation reaches the design depth. If it reaches the design depth of the pile foundation, the construction of the steel pipe pile 1 is completed. If it does not reach the design depth of the pile foundation, repeat step S5 until the design depth of the pile foundation is reached.

[0148] In the present invention, in step S1, the soil quality information includes: distribution and thickness of soil layers, physical properties of soil, and mechanical properties of soil; soil types include: clay, sand, hard soil, and rock soil.

[0149] Before piling, the preliminary investigation is to investigate the site conditions, surrounding conditions and foundation conditions in order to formulate the wing pile construction plan. According to the information collected in the preliminary investigation, the problems in the construction are found out. If the construction of the tip blade and steel pipe pile is expected to be disturbed, appropriate measures are taken in advance, such as replacing the tip blade. In addition, the foundation conditions that are particularly important in the construction of steel pipe piles include: the presence or absence of hard clay layer; the size of rolling stones and pebbles; the height of the groundwater level; the unevenness of the supporting layer. This kind of ground information is crucial to the construction efficiency and the confirmation of the supporting layer. Therefore, it is very important to obtain a lot of information including nearby construction performance.

[0150] Specifically, it is necessary to understand the site conditions, surrounding conditions, and ground conditions. The site conditions include: site area and shape, underground buried objects (including underground obstacles), ground buildings (overhead lines), and air head restrictions;

[0151] Surrounding conditions include: transportation routes for heavy construction machinery and pile materials, road width and traffic conditions, noise and vibration impacts, laws and regulations, whether there are slopes, and whether there are adjacent structures;

[0152] Ground conditions include: geological survey reports of the site and surrounding areas (soil column chart, standard penetration test, groundwater level, etc.), topsoil bearing capacity, soil quality of the middle layer and supporting layer, presence of hard clay layer, presence of rolling stones and pebbles, depth of supporting layer, presence of collapse, presence of contaminated soil, presence of toxic gases, presence of pressurized water, presence of groundwater, and ground historical information.

[0153] When the present invention is used, after determining the piling position, it is necessary to fix the pile cap 2 and the steel pipe pile 1, and the pile cap 2 is put on the pile back position of the steel pipe pile 1, and the worm wheel 6 is driven to rotate by rotating the worm 7, and the worm wheel 6 is coaxially fixed with the rotating disk 5, and the rotating disk 5 is rotationally connected with the pile cap 2, so the rotating disk 5 and the worm wheel 6 rotate synchronously, and a vortex-shaped spiral groove is provided on the rotating disk 5, and a driving block 10 that moves in cooperation with its thread is provided on one side of the spiral groove, and the driving block 10 is fixed to the connecting column 9, and the connecting column 9 penetrates the pile cap 2 and slides, so during the rotation of the rotating disk 5, the spiral groove drives the driving block 10 to move toward the axial position of the rotating disk 5, thereby driving the fixing block 8 to enter the groove 4 of the steel pipe pile 1, so that the fixing block 8 cooperates with the groove 4, and the pile cap 2 and the steel pipe pile 1 are fixed in a limited position;

[0154] The steel pipe pile 1 with a tip blade installed at the end is rotated and pressed down into the soil layer toward the piling position by a pile driver, and the pile cap 2 is driven to rotate by a spinning drive device. The pile cap 2 is fixed to the steel pipe pile 1, thereby driving the pile cap 2 to drive the steel pipe pile 1 to rotate, and the tip blade located at the tip of the steel pipe pile 1 rotates toward the piling position, and the tip blade of the pile tip gradually cuts into the soil layer, thereby entering the soil layer at the piling position, until the steel pipe pile 1 reaches the designed depth of the steel pipe pile 1, the steel pipe pile 1 is separated from the pile cap 2, and the prepared steel pipe pile 1 is lifted by a crane, and one end of the lifted steel pipe pile 1 is lifted. Align with the end of the steel pipe pile 1 entering the soil layer to ensure that the axes of the two steel pipe piles 1 are located at the same axis position, use a welding device to weld the contact positions of the two steel pipe piles 1 to ensure the stability of the welding position, fix the pile cap 2 and the welded steel pipe pile 1, use a spinning drive device to drive the pile cap 2 to rotate, drive the steel pipe pile 1 to move downward into the soil layer, and judge whether the depth of the pile foundation reaches the design depth. If it reaches the design depth of the pile foundation, the construction of the steel pipe pile 1 is completed. If it does not reach the design depth of the pile foundation, continue to pile until the design depth of the pile foundation is reached.

[0155] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A screw-in environmentally friendly steel pipe pile with a pointed blade, comprising: A steel pipe pile, a pile cap fixed to the steel pipe pile, and a spinning drive device for driving the steel pipe pile to rotate downward, characterized in that: The pile cap is installed at the back of the steel pipe pile, and the pile cap is driven to rotate by the spinning drive device; A tip blade is installed at the tip of the steel pipe pile, and the tip blade covers the tip of the steel pipe pile. The tip blade includes: two semi-donut-shaped steel plates; the two semi-donut-shaped steel plates are welded to the lower end of the tip of the steel pipe pile in a V-shaped intersection at the outer periphery of the steel pipe pile.

2. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: A plurality of grooves are provided at the outer periphery of the pile back of the steel pipe pile, and the grooves are arranged in a rectangular shape.

3. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: A fixing assembly is arranged in the pile cap, and the fixing assembly comprises: a rotating disk, a worm wheel coaxially fixed with the rotating disk, a worm meshing with the worm wheel, and a fixing block matched and fixed with the groove of the steel pipe pile; a connecting column is fixedly connected to one side of the fixing block, and an end of the connecting column away from the fixing block passes through the pile cap and is slidably connected with the pile cap; The rotating disk is installed inside the pile cap and is rotatably connected to the pile cap. A spiral groove is arranged on the rotating disk. A driving block is installed in the spiral groove. The driving block is fixedly connected to the connecting column.

4. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: A plurality of the fixing blocks and the grooves are provided, and they correspond to each other one by one.

5. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: The cross section of the fixing block is gradually arranged, and the cross section of the fixing block on the side in contact with the connecting column is gradually reduced toward the side away from the connecting column.

6. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: One of the ends of the semi-donut-shaped steel plates protruding forward is provided with a first incision and a second incision, the first incision is close to the inner diameter position of the semi-donut-shaped steel plate, the angle of the first incision is 20°-25°, the angle of the second incision is 30°-35°, the length ratio of the first incision to the second incision is 1-1.25:2, and the first incision and the second incision are provided with inclined blades.

7. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: The ratio of the diameter of the semi-donut-shaped steel plate to the diameter of the steel pipe pile is 1.5-2:

1. The semi-donut-shaped steel plate is welded to the lower end of the tip of the steel pipe pile in a V-shaped intersection, and the angle between the semi-donut-shaped steel plate and the horizontal direction is 7°-10°.

8. The screw-in environmentally friendly steel pipe pile with pointed blades according to claim 1, characterized in that: A plurality of internal teeth are arranged on the inner wall and the outer wall of the steel pipe pile.

9. A construction method for a screw-in environmentally friendly steel pipe pile with a pointed blade, based on the screw-in environmentally friendly steel pipe pile with a pointed blade as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: Conduct geological survey on the construction area to understand the soil information of the construction area, confirm the soil type, and determine the piling location; Step S2, mounting the steel pipe pile with the pile tip blade installed at the end on the spinning drive device of the spinning pile machine and aligning it with the piling position; Step S3, the spinning drive device drives the steel pipe pile to rotate and drill vertically downward into the formation, and the screwing depth of the steel pipe pile is monitored in real time until the steel pipe pile reaches the designed depth of the steel pipe pile, and the steel pipe pile is separated from the spinning drive device; Step S4, judging whether the depth of the pile foundation reaches the design depth, if it reaches the design depth of the pile foundation, the construction of the steel pipe pile is completed; Step S5, if the designed depth of the pile foundation is not reached, the pile is continued, the steel pipe pile is matched and installed on the spinning drive device of the spinning pile machine, and the pile driving position is aligned, the spinning drive device drives the steel pipe pile to rotate vertically downward into the formation, and the screwing depth of the steel pipe pile is monitored in real time until the steel pipe pile reaches the designed depth of the steel pipe pile, and the steel pipe pile is separated from the spinning drive device; Step S6, judging whether the depth of the pile foundation reaches the design depth, if it reaches the design depth of the pile foundation, completing the construction of the steel pipe pile, if it does not reach the design depth of the pile foundation, repeating step S5 until the design depth of the pile foundation is reached.

10. The construction method of a screw-in environmentally friendly steel pipe pile with a tip blade according to claim 1, characterized in that: In step S1, the soil quality information includes: distribution and thickness of soil layers, physical properties of soil, and mechanical properties of soil; soil types include: clay, sand, hard soil, and rock.

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