Prestressed anchoring device for complex geology steel pipe pile and method of using same

Abstract

The application discloses a prestressed anchoring device for a steel pipe pile in complex geology and a use method thereof, which comprises a steel pipe pile body, an anchoring assembly installed on the outer wall of the steel pipe pile body, and a disturbance assembly, and the steel pipe pile body is a cavity structure; the anchoring coupling effect is formed by respectively arranging the uplift anchoring wings and the sinking anchoring wing pieces with different directions on the first steel pipe pile and the second steel pipe pile, combining the half-water-drop type wing piece structure and the adjustable unfolding direction setting, and then the targeted anchoring of the different depth soil bodies in the composite stratum is realized, the directional matching of the stress transmission modes of different soil layers is realized, and the double bearing capacity of the steel pipe pile in the complex geological soil layer is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of excavation, in particular to a prestressed anchoring device for steel pipe pile in complex geology and a use method thereof. BACKGROUND

[0002] With the acceleration of urbanization process, infrastructure construction is becoming increasingly complex, especially pile foundation construction in complex geological environment, which faces huge technical challenges. The traditional pile foundation technology often has problems such as insufficient bearing capacity and poor pile foundation stability when facing soft soil layer, liquefied soil layer and other complex geological conditions, which is difficult to meet the requirements of modern construction engineering. Therefore, the improvement of pile foundation structure, especially the improvement of pile foundation uplift and anti-sinking capacity in complex geological conditions, has become a technical problem to be solved.

[0003] In the pile foundation design and construction of the prior art, although various methods are used to improve the bearing capacity and stability of the pile foundation, they can only cope with part of the geological problems, and have poor adaptability to composite soil layer or deep soil body. For example, some traditional pile foundation designs increase the stability of the pile foundation by installing reinforcing structures on the surface of the pile body or using special construction processes, but these methods usually result in complex construction, high cost, and limited adaptability to different soil layers; especially in complex geological conditions such as soft silt soil layer or liquefied sandy stratum, the traditional pile foundation design often cannot effectively provide sufficient uplift and anti-sinking bearing capacity.

[0004] Therefore, it is necessary to design a prestressed anchoring device for steel pipe pile in complex geology and a use method thereof to solve the above problems. SUMMARY

[0005] The present application overcomes the shortcomings of the prior art and provides a prestressed anchoring device for steel pipe pile in complex geology and a use method thereof.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a prestressed anchoring device for steel pipe pile in complex geology, comprising: a steel pipe pile body, an anchoring assembly installed on the outer wall of the steel pipe pile body, and a disturbance assembly, the steel pipe pile body being a hollow structure;

[0007] The steel pipe pile body comprises: a first steel pipe pile and a second steel pipe pile; the first steel pipe pile and the second steel pipe pile are fixed by welding;

[0008] The anchoring assembly comprises: a plurality of uplift anchoring fins hinged to the first steel pipe pile, a plurality of anti-sinking anchoring fins hinged to the second steel pipe pile, and a driving member for driving the adjustment of the uplift anchoring fins and the anti-sinking anchoring fins; the uplift anchoring fins and the anti-sinking anchoring fins adjust the angle according to different soil environments;

[0009] The disturbance assembly is composed of a plurality of groups of disturbance parts, and the loose anti-pulling anchor flaps are between the soil and the end of the first steel pipe pile.

[0010] In a preferred embodiment of the present application, annular grooves are formed in the first steel pipe pile and the second steel pipe pile, the anti-pulling anchor flaps are located in the annular grooves of the first steel pipe pile, the anti-sinking anchor flaps are located in the annular grooves of the second steel pipe pile, and reinforcing plates are arranged in the annular grooves.

[0011] In a preferred embodiment of the present application, the reinforcing plates are welded to the bottom surface and the top surface of the annular grooves, and long grooves adapted to the push rods are formed in the reinforcing plates.

[0012] In a preferred embodiment of the present application, the structures of the anti-pulling anchor flaps and the anti-sinking anchor flaps are both semi-droplet structures, and the cross sections of the semi-droplet structures are cavity structures.

[0013] In the initial state, the cross sections of the plurality of anti-pulling anchor flaps and the plurality of anti-sinking anchor flaps are perpendicular to the bottom surface of the annular grooves.

[0014] In the anti-pulling and anti-sinking state, the arc surfaces of the semi-droplet structures of the anti-pulling anchor flaps face downward, and the cross sections face upward, and the arc surfaces of the semi-droplet structures of the anti-sinking anchor flaps face upward, and the cross sections face downward.

[0015] In a preferred embodiment of the present application, a plurality of driving members are arranged and correspond to the anti-pulling anchor flaps and the anti-sinking anchor flaps, and the structures of the plurality of driving members are the same, wherein the driving member corresponding to the anti-pulling anchor flap comprises a push rod connected with the anti-pulling anchor flap, a moving ring hinged to the push rod, and a rotating rod rotatably installed in the first steel pipe pile; the rotating rod is threadedly connected with the moving ring.

[0016] In a preferred embodiment of the present application, in the initial state, the arc surfaces of the semi-droplet structures of the anchor flaps protrude out of the annular grooves to the outer wall of the first steel pipe pile.

[0017] In a preferred embodiment of the present application, the plurality of groups of disturbance parts are uniformly distributed on the outer wall of the first steel pipe pile with the axis of the first steel pipe pile as the axis.

[0018] The disturbance part comprises a plurality of first disturbance blocks and a plurality of second disturbance blocks which are vertically distributed; the adjacent first disturbance blocks and the second disturbance blocks are alternately arranged.

[0019] In a preferred embodiment of the present application, the first disturbance blocks are arranged in clockwise spirals, the second disturbance blocks are arranged in counterclockwise spirals, and the spiral directions of the first disturbance blocks and the second disturbance blocks are opposite.

[0020] The spiral angles of the first disturbance blocks and the second disturbance blocks are 45°-75°.

[0021] In a preferred embodiment of the present application, the discharge port is located on the reinforcing plate.

[0022] A method for using a prestressed anchoring device of a steel pipe pile in complex geology, using the prestressed anchoring device of a steel pipe pile in complex geology, comprising the following steps:

[0023] Step S1, the construction site needs to be pre-explored, the depth range of the soft silt layer and the liquefied sand layer is confirmed, and the first steel pipe pile, the second steel pipe pile and the cylindrical steel pipe pile are manufactured according to the design size;

[0024] Step S2, the anti-pulling anchoring wing is installed on the first steel pipe pile, and the anti-sinking anchoring wing is installed on the second steel pipe pile;

[0025] Step S3, the first steel pipe pile is sunk until the first steel pipe pile is immersed in the soil, and it is judged whether the position of the pile head of the first steel pipe pile reaches the predetermined position, if so, the second steel pipe pile is welded with the first steel pipe pile;

[0026] Step S4, if not, according to the depth range of the soft silt layer and the liquefied sand layer and the height of the first steel pipe pile, the cylindrical steel pipe pile is connected and welded with the first steel pipe pile.

[0027] The present application solves the defects in the background art, and has the following beneficial effects:

[0028] (1) The present application provides a prestressed anchoring device of a steel pipe pile in complex geology and a method for using the same, by arranging different anti-pulling anchoring wings and anti-sinking anchoring wings on the first steel pipe pile and the second steel pipe pile respectively, combining the half water droplet type wing structure and the adjustable expansion direction setting, and then forming the anchoring coupling effect, the specific anchoring of the different depth soil in the composite stratum is realized, and the directional matching of the stress transfer mode of different soil layers is realized, effectively improving the anti-pulling and anti-sinking double bearing capacity of the steel pipe pile in the complex geological soil layer.

[0029] (2) The present application provides a prestressed anchoring device of a steel pipe pile in complex geology and a method for using the same, by arranging the anti-pulling anchoring wing and the anti-sinking anchoring wing in a half water droplet type structure, the anti-pulling anchoring wing expands in an "arc surface downward, opening upward" manner, and the anti-sinking anchoring wing expands in an "arc surface upward, opening downward" manner, the reverse structure of the "opposite expansion" can form the "tight wrapping" or "pressure supporting" mechanism under the action of pulling force or downward pressure, respectively, to enhance the directionality and anti-disturbance ability of the anchoring effect, and the "embedding + wrapping" bidirectional mechanical mode is formed in the cross-sectional cavity, to enhance the synergistic effect between the pile and the soil and improve the overall vertical tensile bearing capacity of the steel pipe pile.

[0030] (3) The application provides a prestressed anchoring device for a steel pipe pile in complex geology and a use method thereof, through the setting of a disturbance component matched with the unfolding of the uplift anchoring fin, a relatively loose disturbance zone with high porosity is formed between the disturbance component and the uplift anchoring fin, the rapid penetration of mud is accelerated, deep penetration and uniform distribution of slurry are realized, a slurry-soil wrapped pile foundation is formed, and the bearing capacity and vertical tensile bearing capacity of the steel pipe pile are improved, meanwhile, the slurry will adhere to the outer wall of the first steel pipe pile, matched with the disturbance component, the adhesion surface and friction between the slurry and the first steel pipe pile are increased, and the firm stability between the first steel pipe pile and the pile foundation is enhanced, and the vertical tensile bearing capacity of the steel pipe pile is further improved.

[0031] (4) The application provides a prestressed anchoring device for a steel pipe pile in complex geology and a use method thereof, through the setting of the uplift anchoring fin in an "arc surface downward and opening upward" mode matched with the injection of slurry, effective accumulation of slurry is realized, a slurry anchor bag structure is formed, the rate of slurry overflow and downward infiltration is reduced, the retention and effective consolidation time of slurry in the fin area are enhanced, and a pile foundation-mud-fin-soil four-fold anchoring coupling structure is formed, meanwhile, after the injection of mud, the steel pipe pile can be further stabilized, and the situation that the steel pipe pile is floated or destabilized due to mud pouring is avoided.

[0032] (5) The application provides a prestressed anchoring device for a steel pipe pile in complex geology and a use method thereof, through the setting of a half-water-drop-shaped uplift anchoring fin, a half-closed channel is formed around the pile body by pre-extrusion during pile sinking, matched with the injection of slurry, the area and volume of the pile foundation are further expanded, and the stability of the steel pipe pile is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings;

[0034] Figure 1 is a perspective structural view of the preferred embodiment of the present application;

[0035] Figure 2 is a perspective structural view of the preferred embodiment of the present application;

[0036] Figure 3 is a perspective structural view of the preferred embodiment of the present application; Figure 2 is an enlarged schematic view of the structure at A in the embodiment;

[0037] Figure 4The anchoring assembly and the disturbing assembly structure matching schematic view of the preferred embodiment of the present application;

[0038] In the figure: 1, first steel pipe pile; 2, second steel pipe pile; 3, uplift anchoring fin; 4, anti-sinking anchoring fin; 5, annular groove; 6, reinforcing plate; 7, long groove; 8, push rod; 9, moving ring; 10, rotating rod; 11, first disturbing block; 12, second disturbing block; 13, discharge port. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0040] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein, and the scope of the present application is not limited to the specific embodiments described herein.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second" and the like are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0042] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0043] AsFigure 1 and Figure 2 As shown in the drawings, a prestressed anchoring device for a complex geological steel pipe pile comprises a steel pipe pile body, an anchoring assembly installed on the outer wall of the steel pipe pile body, and a disturbance assembly, the steel pipe pile body being a hollow structure;

[0044] The steel pipe pile body comprises a first steel pipe pile 1 and a second steel pipe pile 2, and the first steel pipe pile 1 and the second steel pipe pile 2 are fixed by welding;

[0045] The anchoring assembly comprises a plurality of uplift anchoring flaps 3 hinged to the first steel pipe pile 1, a plurality of sinking anchoring flaps 4 hinged to the second steel pipe pile 2, and a driving member for driving the uplift anchoring flaps 3 and the sinking anchoring flaps 4 to adjust respectively, and the uplift anchoring flaps 3 and the sinking anchoring flaps 4 are adjusted in angle according to different soil environments;

[0046] The disturbance assembly is composed of a plurality of disturbance groups, and the soil between the loose uplift anchoring flaps 3 and the end of the first steel pipe pile 1 is disturbed;

[0047] The first steel pipe pile 1 and the second steel pipe pile 2 are both provided with annular grooves 5, the uplift anchoring flaps are located in the annular grooves 5 of the first steel pipe pile 1, the sinking anchoring flaps are located in the annular grooves 5 of the second steel pipe pile 2, and a reinforcing plate 6 is arranged in the annular grooves 5;

[0048] The discharge port 13 is located on the reinforcing plate 6.

[0049] The pipe pile body is formed by welding the first steel pipe pile 1 and the second steel pipe pile 2, forming a through hollow structure, which is convenient for the layout of the internal driving member and the realization of the function, improves the installation stability of the uplift anchoring flaps 3 and the sinking anchoring flaps 4, and the two steel pipe piles are provided with annular groove 5 structures in the circumferential direction, which not only provides accommodation space for the anchoring flaps, but also serves as a track for the unfolding and folding of the flaps.

[0050] Specifically, the first steel pipe pile 1 is used to lay the uplift anchoring flaps 3, and the annular groove 5 thereof is arranged on the outer wall close to the lower end of the pile body, while the second steel pipe pile 2 is used to lay the sinking anchoring flaps 4, and the annular groove 5 thereof is arranged on the outer wall close to the upper end of the pile body, which helps to provide enhanced support in the tension and pressure areas respectively. Each annular groove 5 is provided with a reinforcing plate 6, which is fixed between the top surface and the bottom surface of the groove body by welding, and plays a role in reinforcing the installation area of the flaps, preventing deformation or damage of the groove body caused by long-term stress or flap movement.

[0051] It is worth noting that a long groove 7 structure is pre-set in the reinforcing plate 6, which is matched with a pushing rod 8 for pushing the flaps to unfold, and the pushing rod 8 can freely slide in the long groove 7, thereby realizing the conversion of the flaps from the vertical state in the groove to the unfolded state. This structure design simplifies the motion trajectory of the unfolding mechanism, improves the overall operation stability and reliability.

[0052] Meanwhile, the disturbance assembly is composed of a plurality of disturbance groups, the soil between the loose anti-pulling anchoring flaps 3 and the end of the first steel pipe pile 1 is disturbed, a relatively loose and high-porosity disturbance zone is formed between the disturbance assembly and the anti-pulling anchoring flaps 3, the rapid penetration of the mud is accelerated, the deep penetration and uniform distribution of the slurry are realized, the pile foundation of the slurry-soil package is formed, and the bearing capacity and vertical tensile bearing capacity of the steel pipe pile are improved. Meanwhile, the slurry will adhere to the outer wall of the first steel pipe pile 1, cooperate with the disturbance assembly to increase the adhesion surface and friction force between the slurry and the first steel pipe pile 1, and further enhance the firm stability between the first steel pipe pile 1 and the pile foundation, thereby further improving the vertical tensile bearing capacity of the steel pipe pile.

[0053] When the steel pipe pile is used for pile sinking, the construction site needs to be pre-explored for geology to confirm the depth range of the soft silt layer and the liquefied sand layer, the steel pipe pile body is manufactured according to the design size, the anchoring flap installation position is reserved and the reinforcing plate 6 is welded, the anti-pulling anchoring flaps 3 are installed in the annular groove 5 of the first steel pipe pile 1, the anti-sinking anchoring flaps 4 are installed in the annular groove 5 of the second steel pipe pile 2, the first steel pipe pile 1 is sunk until the first steel pipe pile 1 is immersed in the soil, it is judged whether the pile head position of the first steel pipe pile 1 reaches the predetermined position, if not, according to the depth range of the soft silt layer and the liquefied sand layer and the height of the first steel pipe pile 1, it is judged whether the cylindrical steel pipe pile, i.e. the anchoring assembly and the disturbance assembly, needs to be connected, if so, the cylindrical steel pipe pile is welded with the first steel pipe pile 1, if not, the second steel pipe pile 2 is welded with the first steel pipe pile 1, to ensure the sealing property of the overall structure.

[0054] In the present application, the annular grooves 5 are formed on the first steel pipe pile 1 and the second steel pipe pile 2, the anti-pulling anchoring flaps are located in the annular groove 5 of the first steel pipe pile 1, the anti-sinking anchoring flaps are located in the annular groove 5 of the second steel pipe pile 2, and the reinforcing plate 6 is arranged in the annular groove 5.

[0055] The design of the annular groove 5 enables the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 to be hidden inside the steel pipe pile body without affecting the integrity of the overall structure of the pile body, to reduce the disturbance to the surrounding soil during pile sinking and avoid the premature opening of the anchoring flaps to cause sudden resistance or difficult construction control, and the reinforcing plate 6 is arranged to have two main functions: one is to provide a reinforced base for the installation of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4, to avoid the damage to the local structure of the steel pipe body caused by the force concentration of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 during work; the other is to form a “frame limiting structure” by the bidirectional welding of the body of the reinforcing plate 6 with the top and bottom surfaces of the annular groove 5, to further enhance the counterforce support point during the opening of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4, to ensure the stability of the opening angle and the accuracy of the anchoring direction.

[0056] As Figure 3As shown, in the present application, the driving members are arranged in correspondence with the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4, and the structures of the driving members are the same, wherein the driving member corresponding to the anti-pulling anchoring flap 3 comprises a push rod 8 connected with the anti-pulling anchoring flap 3, a moving ring 9 hinged with the push rod 8, and a rotating rod 10 rotatably installed in the first steel pipe pile 1; the rotating rod 10 is threadedly connected with the moving ring 9.

[0057] The reinforcing plate 6 is welded on the bottom surface and the top surface of the annular groove 5, and a long slot 7 adapted to the push rod 8 is formed on the reinforcing plate 6.

[0058] During the process of sinking the steel pipe pile, the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 need to be driven to unfold, then the driving member is controlled, the push rod 8 is connected with the flaps, and is matched with the reinforcing plate 6 provided with the long slot 7 to realize the radial sliding in the annular groove, the tail end of the push rod 8 is hinged with the moving ring 9, the moving ring 9 is connected with the rotating rod 10 built in the body of the steel pipe pile through thread, the rotation of the rotating rod 10 can drive the push rod 8 to advance radially along the long slot 7, so as to unfold or fold the flaps, and then the unfolding angle of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 is controlled, and then the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 are adjusted according to different soil environments.

[0059] In the present application, the structures of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 are both semi-water droplet structures, and the cross section of the semi-water droplet structure is a cavity structure.

[0060] In the initial state, the cross sections of the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 are all perpendicular to the bottom surface of the annular groove 5.

[0061] In the anti-pulling and anti-sinking state, the anti-pulling anchoring flaps 3 are all semi-water droplet structures, and the arc surfaces of the anti-pulling anchoring flaps 3 after unfolding are downward, and the cross sections are upward, the anti-sinking anchoring flaps 4 are all semi-water droplet structures, and the arc surfaces of the anti-sinking anchoring flaps 4 after unfolding are upward, and the cross sections are downward, wherein the cross section of the semi-water droplet structure is a cross section along the structure symmetry axis.

[0062] By setting the anti-pulling anchoring flaps 3 and the anti-sinking anchoring flaps 4 as semi-water droplet structures, the arc design can significantly reduce the resistance when contacting with the soil, so that the flaps can more stably contact with the soil during the process of pile foundation penetration, thereby reducing the interference in the process of pile body penetration, and ensuring the vertical stability of the pile foundation, in addition, the cross section of the unfolded anti-pulling anchoring flap is upward, which can provide the vertical tensile bearing capacity of the steel pipe pile, the arc surface of the unfolded anti-sinking anchoring flap is upward, which can uniformly distribute the load to a larger area, thereby enhancing the contact force between the pile body and the soil, and improving the bearing capacity of the pile foundation.

[0063] The arc surface of the semi-water-drop type structure of the uplift resisting anchoring fin 3 is downward and the cross section is upward, a slurry retention area can be formed during grouting, the slurry is effectively accumulated by cooperating with the injection of the slurry, the slurry anchor bag structure is formed, the overflow and infiltration rate of the slurry is reduced, the retention and effective consolidation time of the slurry in the fin area is further enhanced, and the pile foundation-mud-fin-soil fourfold anchoring coupling structure is formed, meanwhile, the steel pipe pile can be further stabilized after the injection of the mud, and the situation that the steel pipe pile is floated or unstable due to the mud pouring is avoided,

[0064] For the sinking resisting anchoring fin 4, the arc surface supports the downward pressure and expands the force to a larger soil body, the sinking resistance is enhanced, the cavity structure can accommodate part of the slurry during grouting, the embedded slurry body is formed, and the disturbance resistance and long-term anchoring stability of the whole structure are enhanced, and the disturbance and damage to the foundation soil are effectively reduced.

[0065] In the application, in the initial state, the arc surface of the semi-water-drop type structure protrudes from the outer wall of the first steel pipe pile 1 to the annular groove 5.

[0066] During pile sinking, the arc surface of the semi-water-drop type fin protrudes from the outer wall, which is equivalent to pre-extruding a semi-closed channel around the pile body, the channel is a sliding type structure due to the contact between the fin geometry and the soil, a controllable disturbance cavity is formed in the soil, the slurry fills these cavity channels during grouting, and grouting diffusion can be realized without strong grouting pressure, which significantly reduces the grouting energy consumption and improves the efficiency.

[0067] It should be noted that the geometric shape of the cavity channel is consistent with the direction of the fin root, the slurry is naturally guided to the pile foundation position in this area, and then forms an integral whole with the pile foundation, expands the range of the pile foundation, and further improves the sinking resistance and vertical tensile bearing capacity of the steel pipe pile.

[0068] As shown in the figure, Figure 4 In the application, a plurality of groups of disturbance parts are uniformly distributed on the outer wall of the first steel pipe pile 1 with the axis of the first steel pipe pile 1 as the axis.

[0069] The disturbance parts include a plurality of first disturbance blocks 11 and a plurality of second disturbance blocks 12 which are vertically distributed respectively; the adjacent first disturbance blocks 11 and the second disturbance blocks 12 are alternately arranged.

[0070] The first disturbance blocks 11 are arranged in clockwise spirals, the first disturbance blocks 11 are arranged in counterclockwise spirals, and the spiral directions of the first disturbance blocks 11 and the second disturbance blocks 12 are opposite.

[0071] The spiral angle of the first disturbance blocks 11 and the second disturbance blocks 12 is 45°-75°.

[0072] The present application forms a relatively loose and high porosity disturbance zone between the uplift anchoring fin 3 and the end of the first steel pipe pile 1 during the pile sinking process of the steel pipe pile, accelerates the rapid infiltration of the mud, realizes the deep infiltration and uniform distribution of the slurry, forms a slurry-soil wrapped pile foundation, and further improves the bearing capacity and vertical tensile bearing capacity of the steel pipe pile. At the same time, the slurry will adhere to the outer wall of the first steel pipe pile 1, cooperate with the disturbance assembly to increase the adhesion surface and friction between the slurry and the first steel pipe pile 1, and further enhance the firm stability between the first steel pipe pile 1 and the pile foundation, thereby further improving the vertical tensile bearing capacity of the steel pipe pile.

[0073] Wherein, the plurality of disturbance parts are evenly distributed on the outer wall of the steel pipe pile with the axis of the first steel pipe pile 1 as the axis, and this distribution mode ensures that the disturbance can uniformly act on the surrounding soil during the pile foundation penetration process, so as to form a uniform and stable area around the pile foundation, thereby reducing the uneven distribution of bearing capacity caused by uneven soil.

[0074] Specifically, the disturbance part is composed of a plurality of first disturbance blocks 11 and a plurality of second disturbance blocks 12, and these disturbance blocks are alternately arranged, which can produce a more complex soil movement mode during the disturbance process, increase the deformation ability of the soil and prevent local soil layer from being excessively compacted or loose, thereby improving the overall stability of the pile foundation.

[0075] It is worth mentioning that the disturbance blocks have clockwise and counterclockwise spiral arrangement, specifically, the first disturbance blocks 11 are clockwise spirals, and the second disturbance blocks 12 are counterclockwise spirals, and the spiral directions are opposite, which can effectively disturb the soil when the disturbance blocks contact the soil and enhance the compaction effect of the soil; at the same time, the alternating rotation directions enable the disturbance blocks to produce different disturbance effects in different soil areas, thereby avoiding the local weakening phenomenon of the soil layer caused by single direction disturbance.

[0076] It should be noted that by alternately arranging the first disturbance blocks 11 and the second disturbance blocks 12, after loosening the soil and grouting, the slurry will gradually flow out from the discharge port 13 and the long slot 7 position, and diffuse through the loose soil, thereby forming a pile foundation mixed with mud and soil;

[0077] And the slurry will flow out from the end of the first steel pipe pile 1, and cooperate with the alternately arranged first disturbance blocks 11 and second disturbance blocks 12 to effectively slow down the flow speed of the slurry, so that it can be uniformly distributed in the soil, thereby increasing the contact time of the slurry and the soil, and ensuring that the slurry can fully penetrate and combine with the soil;

[0078] When the slurry flows in the soil at an appropriate speed, the soil can be effectively compacted by the slurry, and the slurry can penetrate into each pore and tiny gap of the soil, increase the overall density of the soil, and meanwhile, the bonding force and friction force between the slurry and the first steel pipe pile 1 are enhanced, so that the slurry is completely covered by the pile foundation after the pile foundation is formed, and the vertical tensile bearing capacity of the steel pipe pile is improved.

[0079] A method for using a prestressed anchoring device of a steel pipe pile in complex geology, which uses the prestressed anchoring device of the steel pipe pile in complex geology, comprises the following steps:

[0080] In step S1, the geological conditions of the construction site are predicted, the depth ranges of the soft silt layer and the liquefied sand layer are determined, and the first steel pipe pile, the second steel pipe pile and the cylindrical steel pipe pile are manufactured according to the design size.

[0081] In step S2, the anti-pulling anchoring flaps are installed on the first steel pipe pile, and the anti-sinking anchoring flaps are installed on the second steel pipe pile.

[0082] In step S3, the first steel pipe pile is sunk until the first steel pipe pile is immersed in the soil, and it is determined whether the position of the pile head of the first steel pipe pile reaches the predetermined position.

[0083] In step S4, if the position does not reach the predetermined position, the cylindrical steel pipe pile is connected according to the depth ranges of the soft silt layer and the liquefied sand layer and the height of the first steel pipe pile, and the cylindrical steel pipe pile is welded with the first steel pipe pile.

[0084] The cylindrical steel pipe pile is a steel pipe without an anchoring assembly and a disturbing assembly.

[0085] In use, the geological conditions of the construction site are predicted, the depth ranges of the soft silt layer and the liquefied sand layer are determined, and the steel pipe pile body is manufactured according to the design size, the flange mounting position is reserved, and the reinforcing plate 6 is welded. The anti-pulling anchoring flaps 3 are installed in the annular groove 5 of the first steel pipe pile 1, the anti-sinking anchoring flaps 4 are installed in the annular groove 5 of the second steel pipe pile 2, the first steel pipe pile 1 is sunk until the first steel pipe pile 1 is immersed in the soil, and it is determined whether the position of the pile head of the first steel pipe pile 1 reaches the predetermined position.

[0086] After the first steel pipe pile 1 will enter the specified depth, by controlling the driving element, the rotating rod 10 is rotated, the moving ring 9 is moved on the rotating rod 10, and then the push rod 8 is matched to drive the anti-pulling anchor wing 3 to gradually unfold; after the second steel pipe pile 2 will enter the specified depth, by controlling the driving element, the rotating rod 10 is rotated, the moving ring 9 is moved on the rotating rod 10, and then the push rod 8 is matched to drive the anti-sinking anchor wing 4 to gradually unfold;

[0087] After the first steel pipe pile 1 will enter the specified depth, the soil between the anti-pulling anchor wing 3 and the end of the first steel pipe pile 1 is loosened by matching the disturbance assembly, then the slurry is injected into the steel pipe pile, the slurry flows into the outer wall of the steel pipe pile through the long groove 7 and the discharge port 13, uniformly penetrates into the soil, forms a pile foundation, and covers the end of the steel pipe pile.

[0088] The above is according to the ideal embodiment of the application, through the above description, the relevant personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the contents of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A prestressed anchoring device for a complex geology steel pipe pile, characterized in that, Comprise: A steel pipe pile body, an anchoring assembly installed on the outer wall of the steel pipe pile body, and a disturbance assembly, the steel pipe pile body is a hollow structure; The steel pipe pile body comprises a first steel pipe pile and a second steel pipe pile; the first steel pipe pile and the second steel pipe pile are welded and fixed, and a discharge port is formed on the first steel pipe pile; The anchoring assembly comprises a plurality of uplift anchoring fins hinged to the first steel pipe pile, a plurality of anti-sinking anchoring fins hinged to the second steel pipe pile, and a driving member for driving the adjustment of the uplift anchoring fins and the anti-sinking anchoring fins respectively; the uplift anchoring fins and the anti-sinking anchoring fins adjust the angle according to different soil environments; The structure of the uplift anchoring fins and the anti-sinking anchoring fins is a half water droplet type structure, and the cross section of the half water droplet type structure is a hollow structure; In the uplift-anti-sinking state, the arc surface of the half water droplet type structure of the uplift anchoring fin is downward, and the cross section is upward, and the arc surface of the half water droplet type structure of the anti-sinking anchoring fin is upward, and the cross section is downward; The disturbance assembly is composed of a plurality of disturbance groups, which loosen the soil between the uplift anchoring fins and the end of the first steel pipe pile; The disturbance part comprises a plurality of first disturbance blocks and a plurality of second disturbance blocks which are vertically distributed respectively; adjacent first disturbance blocks and second disturbance blocks are alternately arranged; The first disturbance block is arranged in a clockwise spiral, the first disturbance block is arranged in a counterclockwise spiral, and the spiral directions of the first disturbance block and the second disturbance block are opposite; Wherein, the spiral angle of the first disturbance block and the second disturbance block is 45°-75°.

2. The prestressed anchorage device for a steel pipe pile in complex geology according to claim 1, characterized in that: The first steel pipe pile and the second steel pipe pile are both provided with an annular groove, the uplift anchoring fin is located in the annular groove of the first steel pipe pile, the anti-sinking anchoring fin is located in the annular groove of the second steel pipe pile, and a reinforcing plate is arranged in the annular groove.

3. The prestressed anchorage device for a steel pipe pile in complex geology according to claim 2, characterized in that: The driving member is provided with a plurality of driving members corresponding to the uplift anchoring fins and the anti-sinking anchoring fins, and the structures of the plurality of driving members are the same, wherein the driving member corresponding to the uplift anchoring fin comprises a push rod connected with the uplift anchoring fin, a moving ring hinged to the push rod, and a rotating rod rotatably installed in the first steel pipe pile; the rotating rod is threadedly connected with the moving ring.

4. The prestressed anchorage device for a steel pipe pile in complex geology according to claim 3, characterized in that: The reinforcing plate is welded to the bottom surface and the top surface of the annular groove, and a long slot adapted to the push rod is formed in the reinforcing plate.

5. The prestressed anchoring device for the steel pipe pile in complex geology according to claim 2, wherein: In the initial state, the cross sections of the plurality of uplift anchoring fins and the plurality of anti-sinking anchoring fins are perpendicular to the bottom surface of the annular groove.

6. The prestressed anchorage device for a steel pipe pile in complex geology according to claim 1, characterized in that: In the initial state, the arc surface of the half water droplet type structure of the anchoring fin protrudes out of the annular groove to the outer wall of the first steel pipe pile.

7. The prestressed anchorage device for a steel pipe pile in complex geology according to claim 1, characterized in that: A plurality of groups of disturbance parts are uniformly distributed on the outer wall of the first steel pipe pile with the axis of the first steel pipe pile as the axis.

8. The prestressed anchorage device for a complex geology steel pipe pile according to claim 2, characterized in that: The discharge port is located on the reinforcing plate.

9. A method of using a prestressed anchoring device for a steel pipe pile in complex geology, according to any one of claims 1-8, characterized in that, The steps comprise: Step S1, the construction site needs to be pre-geological, confirm the depth range of soft silt layer and liquefied sand layer, and manufacture the first steel pipe pile, the second steel pipe pile and the cylindrical steel pipe pile according to the design size; Step S2, the anti-pulling anchoring fin is installed on the first steel pipe pile, and the anti-sinking anchoring fin is installed on the second steel pipe pile; Step S3, the first steel pipe pile is sunk until the first steel pipe pile is immersed in the soil, and it is judged whether the pile head position of the first steel pipe pile reaches the predetermined position, if so, the second steel pipe pile is welded with the first steel pipe pile; Step S4, if not, according to the depth range of soft silt layer and liquefied sand layer and the height of the first steel pipe pile, the cylindrical steel pipe pile is connected, and the cylindrical steel pipe pile is welded with the first steel pipe pile.

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