Anti-blocking screw pile used for trestle in complex terrain

Abstract

The utility model discloses an anti-clogging screw pile used for a trestle in a complex terrain, which comprises an anti-clogging screw pile body, the anti-clogging screw pile body comprises a pile body, the upper end of the pile body is a pile top, and the lower end of the pile body is provided with a pile tip; the grouting holes are formed in the pile body or the pile tip in a penetrating mode or formed in the pile body and the pile tip; the anti-blocking cover is detachably mounted on each grouting hole; and the prestress bearing part is arranged on the outer surface of the pile body and used for increasing the friction force between the pile body and soil and improving the lateral stability and the bearing capacity of the pile. According to the utility model, blockage in the grouting process can be prevented, and the grouting quality and the construction efficiency are ensured; in addition, the anti-blocking cover can prevent sundries such as soil or gravels in the screw pile from entering the grouting pipeline, the purity of the grouting material is guaranteed, the grouting material can be injected into the screw pile more evenly, and the grouting efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to a spiral pile, in particular to an anti-clogging spiral pile used for a trestle bridge on complex terrain, which is mainly used for providing stable foundation support by being screwed into the ground and belongs to the technical field of foundation treatment. Background Art

[0002] Generally speaking, pile foundation, as a foundation form with a long history, is widely used in various foundation engineering constructions due to its high bearing capacity, slow settlement rate and small settlement amount.

[0003] At present, the use of spiral piles is a commonly used foundation treatment method, which is a pile foundation formed by pushing spiral steel pipes or steel plates into the soil. Due to the advantages of convenient installation, fast construction speed, strong adaptability and reusability, spiral piles are widely used in construction, transportation, water conservancy and other fields.

[0004] At present, traditional screw piles still have the following disadvantages in certain construction situations:

[0005] On the one hand, the bearing capacity of traditional screw piles may be limited by soil conditions and geological characteristics. In some areas with poor soil quality or complex geology, the bearing capacity of traditional screw piles may be insufficient and other reinforcement measures may be needed.

[0006] On the other hand, the installation is difficult. The installation of traditional screw piles usually requires large mechanical equipment and professional construction technology. In narrow spaces or special terrains, the installation of screw piles may face difficulties. The conventional method requires the forward and reverse rotation of the drill rig to achieve removal. Therefore, the screw piles must be loosened during the forward and reverse rotation of the drill rig to facilitate removal. This method will damage the soil, increase the disturbance to the soil, and affect the bearing capacity of the foundation;

[0007] Another aspect is that it is not suitable for soft soil areas: the bearing capacity of traditional screw piles in soft soil areas may be poor. The soil in soft soil areas may not provide sufficient lateral friction resistance, resulting in reduced stability of screw piles, especially for trestles in complex terrain;

[0008] More importantly, when the current spiral piles are implanted in the soil, the mud and sand in the soil often enter the pile body through the grouting holes, which will lead to a reduction in the grouting volume and poor grouting uniformity, thus affecting the bearing capacity and service life of the spiral piles. As a result, the slurry cannot flow out smoothly during grouting. In severe cases, the grouting holes will be blocked, resulting in grouting difficulties and low grouting efficiency. In severe cases, grouting cannot be achieved, and the spiral piles need to be taken out again for manual intervention and cleaning before they can be used again. In short, it is often very inconvenient.

[0009] Therefore, the key to solving the above technical problems is to develop an anti-blocking spiral pile that is highly practical and has high working reliability and is used for trestles in complex terrains. Summary of the invention

[0010] In view of the many defects and shortcomings existing in the above-mentioned background technology, the utility model has made improvements and innovations thereto, with the purpose of providing a grouting anti-clogging cover with a simple structure and a novel and reasonable design to prevent blockage during the grouting process and ensure the grouting quality and construction efficiency; the anti-clogging cover can also prevent debris such as soil or gravel inside the spiral pile from entering the grouting pipe, thereby ensuring the purity of the grouting material, and enabling the grouting material to be more evenly injected into the spiral pile, thereby improving the grouting efficiency and quality.

[0011] Another invention purpose of the utility model is that the quick-disassembly installation structure design can be more convenient for maintenance and replacement of damaged parts, reducing maintenance costs and time, and can improve construction efficiency and maintenance convenience, thereby reducing construction cycles and maintenance costs, and bringing great convenience and economic benefits to the use and maintenance of spiral piles;

[0012] In order to solve the above problems and achieve the above invention objectives, the utility model is a kind of anti-blocking spiral pile used for complex terrain trestle bridge, which is realized by adopting the following design structure and the following technical solution:

[0013] An anti-clogging spiral pile for use in a trestle bridge on complex terrain comprises an anti-clogging spiral pile body (1), wherein the anti-clogging spiral pile body (1) comprises:

[0014] A pile body (11), wherein the upper end of the pile body (11) is a pile top (111), and the lower end of the pile body (11) is provided with a pile tip (112);

[0015] A grouting hole (12), the grouting hole (12) is provided through the pile body (11) or the pile tip (112), or is provided on both the pile body (11) and the pile tip (112);

[0016] An anti-clogging cover (13), the anti-clogging cover (13) is detachably mounted on each grouting hole (12);

[0017] A prestressed bearing member (14) is arranged on the outer surface of the pile body (11) and is used to increase the friction between the pile body and the soil, thereby improving the lateral stability and bearing capacity of the pile.

[0018] Preferably, it also includes:

[0019] A quick-detachable installation structure (15) is symmetrically arranged on both sides of the pile top (111).

[0020] Preferably, the quick-release installation structure (15) extends from the top end of the pile top (111) to the lower end and is opened in the middle of the pile top (111).

[0021] Preferably, the quick-release installation structure (15) is recessed toward the inside of the pile top (111) to form a recessed portion, which matches the clamping portion of the pile clamp on the drilling rig (2) to achieve quick connection and quick removal from the drilling rig (2).

[0022] Preferably, the pile body (11) is a tubular member with a hollow interior;

[0023] The pile top (111) is a screw or lead screw with an external threaded section on the outside, and is used for being detachably connected to the drilling rig (2);

[0024] The pile tip (112) is a cone.

[0025] Preferably, the grouting holes (12) are evenly and annularly formed on the pile body (11) or the pile tip (112), or are formed on both the pile body (11) and the pile tip (112), and the grouting holes (12) penetrate the front and back sides of the pile body (11) or the pile tip (112).

[0026] Preferably, the anti-clogging cover (13) is a truncated cone structure with one end being large and the other end being small. The anti-clogging cover (13) of the truncated cone structure is adapted to the shape and size of the grouting hole (12) and is used to be tightly installed with the grouting hole (12). The total number of anti-clogging covers (13) is the same as the total number of grouting holes (12).

[0027] Preferably, the anti-blocking cover (13) and the pile body (11) are of separate structures or of connected structures.

[0028] Preferably, the split structure is that the anti-clogging cover (13) is detachably installed on the grouting hole (12) in a plug-in or snap-fit ​​manner;

[0029] The connected structure is a structure in which the fixed end of the anti-clogging cover (13) is connected to the outer wall of the pile body (11) through a connecting belt to form an integral structure, and the working end of the anti-clogging cover (13) is detachably installed in the grouting hole (12) in a plug-in or snap-in manner.

[0030] Preferably, the prestressed bearing member (14) is a spiral blade or a spiral plate, which is arranged on the outer wall of the lower half of the pile body (11) from bottom to top or from top to bottom along the length direction of the pile body (11) and is surrounded or wound.

[0031] The working principle is: the anti-clogging spiral pile of the above-mentioned design structure used for a trestle in complex terrain needs to be installed as a spare before use.

[0032] Before installation, the operator only needs to carry the anti-clogging spiral piles of various lengths and sizes of the utility model to the designated construction location manually or with corresponding carrying equipment according to the actual use situation for installation and use.

[0033] During installation, the operator only needs to install the anti-clogging spiral pile body (1) to the corresponding position of the drilling rig. Specifically, after the pile position is staked out, the drilling rig (4) is put in place, and the anti-clogging spiral pile body (1) is manually lifted and inserted into the drill bit of the drilling rig, and the pile clamping part or the pile clamping part of the drill bit of the drilling rig is just engaged with the quick-release installation structure (15) to form a whole.

[0034] Then, the drilling work is carried out. During the drilling, the operator controls the drilling machine (4) to adjust the machine body, calibrates the position so that the drill rod of the anti-clogging spiral pile body (1) is vertically aligned with the center of the pile position, starts the drilling machine (4) and drills the anti-clogging spiral pile body (1) into the ground at a uniform speed. During the drilling process, gravity should not be applied to press downward to avoid damaging the soil.

[0035] After the drilling is completed, grouting is performed: during grouting, after the anti-clogging spiral pile body (1) is completely drilled into the ground, the drilling machine (4) is removed, and a pre-prepared grouting pipe is inserted into the anti-clogging spiral pile body (1) from the top of the anti-clogging spiral pile body (1). The pre-prepared grouting machine is used to inject the mixed cement into the anti-clogging spiral pile body (1). The cement slurry flows into the anti-clogging spiral pile body (1) along the pipe wall of the anti-clogging spiral pile body (1) and flushes the anti-clogging cover (13), so that the anti-clogging cover (13) of the vertebral structure is separated from the grouting hole (12), and the cement slurry flows out smoothly along the grouting hole (12), thereby achieving grouting. During the grouting process, the cement slurry is turned out from the periphery of the anti-clogging spiral pile body (1) until it can be seen with the naked eye that the cement slurry is turned out from the pile of the anti-clogging spiral pile body (1), and the construction of the spiral ground pile is finally completed.

[0036] During the above-mentioned entire implementation operation process, if a pile connection operation is required, since each section of the anti-clogging spiral pile body (1) is two meters long, each section is connected by a threaded pile connection connector (3) designed to match or match it. When the first section is drilled to 20 cm from the top of the pile to the ground, the drill bit of the drilling rig (4) loosens the first section of the anti-clogging spiral pile body (1), then raises the drill bit, manually inserts the second section of the anti-clogging spiral pile body (1) into the drill bit of the drilling rig, and the drill bit is downward and rotated to connect the second section with the first section, and the construction of the entire spiral pile is completed in sequence according to the design drawings.

[0037] Meanwhile, the utility model can use a rotation method or a vibration method as required. In the rotation method, the spiral pile is gradually pushed into the soil by a rotating device; in the vibration method, the spiral pile is vibrated into the soil by a vibrating device. During the installation process, anti-clogging spiral pile bodies (1) of different specifications and lengths can be selected according to soil conditions and bearing capacity requirements. The drilling rig (4) can be a crawler drilling rig.

[0038] Compared with the prior art, the utility model has the following beneficial effects:

[0039] 1. The utility model has a simple structure and a novel and reasonable design. The grouting anti-clogging cover prevents blockage during the grouting process, thereby ensuring the grouting quality and construction efficiency. The anti-clogging cover can also prevent debris such as soil or gravel inside the spiral pile from entering the grouting pipe, thereby ensuring the purity of the grouting material.

[0040] 2. The utility model adopts the anti-blocking cover designed by the utility model to seal the grouting hole when drilling into the soil in advance, thereby reducing the probability of mud and sand entering the pile body and causing blockage, so that the grouting material can be more evenly injected into the spiral pile, thereby improving the grouting efficiency and quality;

[0041] 3. During the construction of the spiral pile, the utility model provides a grouting anti-blocking cover to improve the grouting efficiency and quality, reduce the construction difficulty and risk, and thus ensure the bearing capacity and service life of the spiral pile;

[0042] 4. The quick-disassembly installation structure design of the utility model solves the problem that the traditional manual operation takes a long time to complete the removal, and reduces the technical problem that the traditional method requires the drilling rig to reverse and loosen the spiral pile to facilitate the removal, which will damage the soil, increase the disturbance to the soil, and affect the bearing capacity of the foundation; it simplifies the construction process, improves the construction efficiency, and shortens the construction period;

[0043] 5. The quick-disassembly installation structure design of the utility model can more conveniently carry out maintenance and replacement of damaged parts, reduce maintenance costs and time, improve construction efficiency and maintenance convenience, thereby reducing construction cycles and maintenance costs, and bringing great convenience and economic benefits to the use and maintenance of spiral piles;

[0044] 6. The utility model designs a hollow screw-shaped spiral pile for use as a pile foundation. The rod is small, and it is easy to construct and carry in the woods. It does not require the construction of a temporary road or an operating platform, and does not require earth excavation. It does not affect the surrounding ecological environment, and achieves the purpose of low carbon, ecology, and environmental protection.

[0045] 7. The utility model reduces the difficulty of management and the frequency of potential safety hazards, speeds up construction, shortens the construction period, reduces management costs, and reduces labor and machinery inputs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0047] Figure 1 This is one of the schematic diagrams of the use state of the utility model;

[0048] Figure 2 This is the second schematic diagram of the use state of the utility model;

[0049] Figure 3 It is one of the overall structural schematic diagrams of the utility model;

[0050] Figure 4 It is a schematic diagram of the overall structure of another design structure of the utility model;

[0051] Figure 5 This is another overall structural diagram of the design structure of the utility model;

[0052] Figure 6 It is a schematic diagram of a design structure of the top structure of the pile body (11) of the utility model;

[0053] Figure 7 This is one of the schematic diagrams of a design structure of the bottom structure of the pile body (11) of the utility model;

[0054] Figure 8 This is a second schematic diagram of a design structure of the bottom structure of the pile body (11) of the utility model;

[0055] Fig. 9 yes Figure 8 A local enlarged structural schematic diagram of position A shown;

[0056] Fig.10 This is another schematic diagram of the design structure of the bottom structure of the pile body (11) of the utility model;

[0057] Fig.11 yes Fig.10 A schematic diagram of the local enlarged structure of the B position;

[0058] Among them, the numbers in the figure are: 1 - anti-clogging spiral pile body, 11 - pile body, 111 - pile top, 112 - pile tip, 12 - grouting hole, 13 - anti-clogging cover, 14 - prestressed bearing member, 15 - quick-release installation structure;

[0059] 2—Drilling rig;

[0060] 3—Pile connector;

[0061] 4—Drilling rig;

[0062] 5—Soil. DETAILED DESCRIPTION

[0063] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0064] In summary, a more specific implementation method of the present invention is:

[0065] Example 1

[0066] As shown in the accompanying drawings of the specification, an anti-clogging spiral pile for use in a trestle bridge on complex terrain includes an anti-clogging spiral pile body 1, and the anti-clogging spiral pile body 1 includes:

[0067] A pile body 11, wherein the upper end of the pile body 11 is a pile top 111, and the lower end of the pile body 11 is provided with a pile tip 112;

[0068] Grouting holes 12, which are provided through the pile body 11 or the pile tip 112 or are provided on both the pile body 11 and the pile tip 112;

[0069] An anti-clogging cover 13, which is detachably mounted on each grouting hole 12;

[0070] The prestressed bearing member 14 is arranged on the outer surface of the pile body 11 to increase the friction between the pile body and the soil, thereby improving the lateral stability and bearing capacity of the pile.

[0071] Further, such as Figures 3 to 5 As shown, the pile body 11 is a tubular member with a hollow interior;

[0072] The pile top 111 is a screw or lead screw with an external threaded section on the outside, which is used for detachable connection with the drilling rig 2;

[0073] The pile tip 112 is a cone.

[0074] Specifically, Figure 3 As shown, the grouting holes 12 are evenly arranged in a circular shape on the pile body 11 or the pile tip 112 or are arranged on both the pile body 11 and the pile tip 112 , and the grouting holes 12 pass through the front and back sides of the pile body 11 or the pile tip 112 .

[0075] Furthermore, Figures 7 to 11As shown, the anti-clogging cover 13 is a frustoconical structure with one end being large and the other end being small. The anti-clogging cover 13 of the frustoconical structure is adapted to the shape and size of the grouting hole 12 and is used to be tightly installed with the grouting hole 12. The total number of anti-clogging covers 13 is the same as the total number of grouting holes 12.

[0076] Specifically, the anti-blocking cover 13 and the pile body 11 are a separate structure or a connected structure.

[0077] Further, such as Fig.10 As shown, the split structure is that the anti-clogging cover 13 is detachably installed on the grouting hole 12 in a plug-in or snap-in manner;

[0078] Further, such as Fig.11 As shown, the connected structure is that the fixed end of the anti-clogging cover 13 is connected to the outer wall of the pile body 11 through a connecting belt to form an integral structure, and the working end of the anti-clogging cover 13 can be detachably installed in the grouting hole 12 by plug-in or snap-in.

[0079] Further, such as Figures 3 to 5 As shown, the prestressed bearing member 14 is a spiral blade or a spiral plate, which is arranged on the outer wall of the lower half of the pile body 11 from bottom to top or from top to bottom along the length direction of the pile body 11 and is surrounded or wound.

[0080] Furthermore, an injection molding layer, an anti-rust layer, a waterproof layer and a warning layer are sequentially arranged on the outer surface of the anti-clogging spiral pile body 1 from the inside to the outside, and the warning layer is coated with fluorescent powder.

[0081] In the utility model, a polymer wear-resistant material is injection molded on the injection layer; the anti-rust layer includes an epoxy zinc-rich primer and a chlorinated rubber topcoat and an epoxy micaceous iron intermediate paint located between the epoxy zinc-rich primer and the chlorinated rubber topcoat; the waterproof layer is a polyurethane waterproof coating; the warning layer is a reflective warning tape or a reflective color film or a reflective paint of a single color or a mixture of multiple colors.

[0082] Therefore, since the anti-rust layer and the waterproof layer are coated on the outside of the utility model, it can prevent rust and extend the service life of the entire device, achieving environmental protection while saving resources. At the same time, the outside of the device is coated with a self-luminous fluorescent material, which can clearly mark the location of the device at night or in a dark room and underground construction environment, and can effectively serve as a safety reminder, improve conspicuousness, make it easy for people to identify, and increase safety in construction and life.

[0083] The anti-clogging spiral piles of the above-mentioned design structure used for a trestle bridge in complex terrain need to be installed as a spare before use.

[0084] Before installation, the operator only needs to carry the anti-clogging spiral piles of various lengths and sizes of the utility model to the designated construction location manually or with corresponding carrying equipment according to the actual use situation for installation and use.

[0085] During installation, the operator only needs to install the anti-clogging spiral pile body 1 to the corresponding position of the drilling rig. Specifically, after the pile position is staked out, the drilling rig 4 is put in place, and the anti-clogging spiral pile body 1 is manually lifted and inserted into the drill bit of the drilling rig to be connected as a whole;

[0086] Then the drilling work is carried out. During drilling, the operator controls the drilling rig 4 to adjust the body, corrects the position so that the drill rod of the anti-clogging spiral pile body 1 is vertically aligned with the center of the pile position, starts the drilling rig 4 to drill the anti-clogging spiral pile body 1 into the ground at a uniform speed, and does not apply gravity to press downward during the drilling process to avoid damaging the soil.

[0087] After drilling is completed, grouting work is carried out: during grouting, after the anti-clogging spiral pile body 1 is completely drilled into the ground, the drilling rig 4 is removed, and the pre-prepared grouting pipe is inserted into the anti-clogging spiral pile body 1 from the top of the anti-clogging spiral pile body 1, and the pre-prepared grouting machine is used to inject the mixed cement into the anti-clogging spiral pile body 1, and the cement slurry enters the anti-clogging spiral pile body 1 along the pipe wall of the anti-clogging spiral pile body 1 and flushes the anti-clogging cover 13, so that the anti-clogging cover 13 is separated from the grouting hole 12, and the cement slurry flows out smoothly along the grouting hole 12 to realize grouting. During the grouting process, the cement slurry is turned out from the pile periphery of the anti-clogging spiral pile body 1 until it can be seen with the naked eye that the cement slurry is turned out from the pile periphery of the anti-clogging spiral pile body 1, and finally the construction of the spiral ground pile is completed.

[0088] During the entire implementation process mentioned above, if a pile connection operation is required, since each section of the anti-clogging spiral pile body 1 is two meters long, each section is connected by a threaded pile connection connector 3 designed to match or match it. When the first section is drilled to 20 cm from the top of the pile to the ground, the drill bit of the drilling rig 4 loosens the connected first section of the anti-clogging spiral pile body 1, and then raises the drill bit, manually inserts the second section of the anti-clogging spiral pile body 1 into the hole drilling rig drill bit, and the drill bit moves downward and rotates to connect the second section with the first section, and the construction of the entire spiral pile is completed in sequence according to the design drawings.

[0089] Meanwhile, the utility model can use the rotation method or the vibration method as required. In the rotation method, the spiral pile is gradually pushed into the soil by a rotating device; in the vibration method, the spiral pile is vibrated into the soil by a vibrating device. During the installation process, the anti-clogging spiral pile body 1 of different specifications and lengths can be selected according to the soil conditions and bearing capacity requirements. The drilling rig 4 can be a crawler drilling rig.

[0090] In this embodiment 1, the grouting anti-clogging cover prevents blockage during the grouting process, thereby ensuring the grouting quality and construction efficiency; the anti-clogging cover can also prevent debris such as soil or gravel inside the spiral pile from entering the grouting pipe, thereby ensuring the purity of the grouting material; by using the anti-clogging cover designed by the utility model to close the grouting hole when pre-drilling into the soil, the probability of mud and sand entering the pile body and causing blockage is reduced, so that the grouting material can be more evenly injected into the spiral pile, thereby improving the grouting efficiency and quality; during the spiral pile construction process, the provision of a grouting anti-clogging cover can improve the grouting efficiency and quality, reduce construction difficulty and risk, and thereby ensure the bearing capacity and service life of the spiral pile.

[0091] Example 2

[0092] like Figure 3 and Figure 6 As shown, embodiment 2 is basically the same as embodiment 1, except that it further includes:

[0093] The quick-release installation structure 15 is symmetrically arranged on both sides of the pile top 111 .

[0094] Specifically, the quick-release installation structure 15 extends from the top end of the pile top 111 to the lower end and is opened in the middle of the pile top 111 .

[0095] Specifically, the quick-release installation structure 15 is recessed toward the inner side of the pile top 111 to form a recessed portion, and the recessed portion matches with the clamping portion of the pile clamp on the drilling rig 2 to achieve quick connection and quick removal with the drilling rig 2 .

[0096] The implementation method of this embodiment 2 is: during installation, the operator only needs to install the anti-clogging spiral pile body 1 to the corresponding position of the drilling rig. Specifically, after the pile position is staked out, the drilling rig 4 is put in place, and the anti-clogging spiral pile body 1 is manually lifted and inserted into the drill bit of the drilling rig, and the pile clamping part or the pile clamping part of the drill bit of the drilling rig is just engaged with the quick-release installation structure 15 to form a whole, and then subsequent work is carried out. The quick-release installation structure design of the utility model solves the problem that the traditional manual operation requires a long time to complete the removal, and reduces the traditional need for the drilling rig to reverse and unscrew the spiral pile to facilitate removal. This method will damage the soil, increase the disturbance to the soil, and affect the bearing capacity of the foundation. The technical problem is that the construction process is simplified, the construction efficiency is improved, and the construction period is shortened;

[0097] At the same time, the quick-disassembly installation structure design can make maintenance and replacement of damaged parts more convenient, reducing maintenance costs and time, and can improve construction efficiency and maintenance convenience, thereby reducing construction cycles and maintenance costs, bringing great convenience and economic benefits to the use and maintenance of spiral piles;

[0098] The specific usage is the same as that in Example 1 and will not be repeated here.

[0099] Finally, it should be noted that the above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. An anti-clogging spiral pile for use in a trestle bridge on complex terrain, comprising an anti-clogging spiral pile body (1), characterized in that: The anti-clogging spiral pile body (1) comprises: A pile body (11), wherein the upper end of the pile body (11) is a pile top (111), and the lower end of the pile body (11) is provided with a pile tip (112); A grouting hole (12), the grouting hole (12) is formed through the pile body (11) or the pile tip (112), or is formed on both the pile body (11) and the pile tip (112); An anti-clogging cover (13), the anti-clogging cover (13) being detachably mounted on each grouting hole (12); A prestressed bearing member (14) is arranged on the outer surface of the pile body (11) and is used to increase the friction between the pile body and the soil, thereby improving the lateral stability and bearing capacity of the pile.

2. The anti-clogging spiral pile for use in a trestle in complex terrain according to claim 1, characterized in that: Also included are settings such as: A quick-detachable installation structure (15) is symmetrically arranged on both sides of the pile top (111).

3. The anti-clogging spiral pile for use in a trestle in complex terrain according to claim 2, characterized in that: The quick-release installation structure (15) extends from the top end of the pile top (111) to the lower end and is opened in the middle of the pile top (111).

4. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 2 or 3, characterized in that: The quick-release installation structure (15) is recessed toward the inside of the pile top (111) to form a recessed portion, which matches the clamping portion of the pile clamp on the drilling rig (2), thereby achieving quick connection and quick disassembly with the drilling rig (2).

5. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 1, characterized in that: The pile body (11) is a tubular member with a hollow interior; The pile top (111) is a screw or lead screw with an external threaded section on the outside, and is used for being detachably connected to the drilling rig (2); The pile tip (112) is a cone-shaped body.

6. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 1, characterized in that: The grouting holes (12) are evenly and annularly formed on the pile body (11) or the pile tip (112), or are formed on both the pile body (11) and the pile tip (112), and the grouting holes (12) penetrate the front and back sides of the pile body (11) or the pile tip (112).

7. The anti-clogging spiral pile for use in a trestle in complex terrain according to claim 1, characterized in that: The anti-clogging cover (13) is a truncated cone structure with one end being large and the other end being small. The anti-clogging cover (13) of the truncated cone structure is adapted to the shape and size of the grouting hole (12) and is used to be tightly mounted on the grouting hole (12). The total number of anti-clogging covers (13) is the same as the total number of grouting holes (12).

8. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 1 or 7, characterized in that: The anti-blocking cover (13) and the pile body (11) are of a separate structure or a connected structure.

9. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 8, characterized in that: The split structure is that the anti-clogging cover (13) is detachably installed on the grouting hole (12) in a plug-in or snap-fit ​​manner; The connected structure is a structure in which the fixed end of the anti-clogging cover (13) is connected to the outer wall of the pile body (11) via a connecting belt to form an integral structure, and the working end of the anti-clogging cover (13) is detachably mounted on the grouting hole (12) in a plug-in or snap-fit ​​manner.

10. The anti-clogging spiral pile for use in a trestle bridge on complex terrain according to claim 1, characterized in that: The prestressed bearing member (14) is a spiral blade or a spiral plate, and the spiral blade or the spiral plate is arranged on the outer wall of the lower half of the pile body (11) from bottom to top or from top to bottom along the length direction of the pile body (11) so as to surround or wrap around.

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