A steel pipe pile suitable for collapsible loess and installation method

Abstract

The present invention relates to the technical field of electric tower base pipe piles, specifically a steel pipe pile suitable for collapsible loess and an installation method, including a transmission tower, the transmission tower is installed on a concrete ground through a pile structure, the pile structure includes a connecting column, the bottom of the transmission tower is fixedly connected to the connecting column, the connecting column is slidably connected in a bearing base, the bearing base and the lower end surface of the connecting column form a sealed cavity, one side of the bearing base is fixedly connected with a hydraulic pipe, and the end of the hydraulic pipe away from the bearing base is fixedly connected with a hydraulic station, the hydraulic station is used to replenish the liquid oil in the cavity. When settlement occurs, the transmission tower will slowly tilt, and the hydraulic station can be called by a level detector to fill the inside of the bearing base with liquid oil through the hydraulic pipe at a low horizontal position. Due to the increase of liquid oil in the bearing base, the liquid oil will push the connecting column to slide upward to lift the legs of the inclined part of the transmission tower, so that the transmission tower is not affected by ground settlement and tilts.

Description

Technical Field

[0001] The invention relates to a steel pipe pile suitable for collapsible loess and an installation method, and is particularly suitable for a tower foundation in a thick self-weight collapsible loess layer. Background Art

[0002] Collapsible loess is a kind of soil with special properties. Its main feature is that under the self-weight stress of the overlying soil layer, or under the combined action of self-weight stress and additional stress, the soil structure is destroyed after being soaked in water, resulting in significant additional deformation. During the design and construction of steel pipe piles suitable for collapsible loess, it is necessary to consider the special properties of collapsible loess, such as collapsibility, low water content, poor permeability, fine particles, small pores, low natural density, poor compaction, weak plasticity and strong water permeability.

[0003] The Chinese invention patent with publication number CN117758779A provides an adjustable height anti-settling foundation pile for an electric power tower. When the tower body is deflected, it needs to be corrected. First, the positioning plate on one side of the tower body is lowered. At this time, the wrench is clamped with the outer wall of the turntable. Under the restriction of the limit rings set on both sides of the turntable, the wrench and the turntable can be prevented from falling off. At this time, the turntable is rotated so that the turntable drives the rotating rod to rotate, thereby making corrections. In actual applications, because the weight of the tower is large, it relies on manual manual driving of the gear, and then the gear drives other components to drive one corner of the tower to lift. The operation requires a lot of force and is not easy to complete. At the same time, ground settlement often occurs slowly, and the equipment provided by the above invention needs to be discovered through artificial vision, which is not timely.

[0004] In view of this, the present invention proposes a steel pipe pile suitable for collapsible loess and an installation method, which solves the above technical problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] A steel pipe pile suitable for collapsible loess and an installation method, comprising a transmission tower, wherein the transmission tower is installed on a concrete ground through a pile structure, the pile structure comprising a connecting column, the bottom of the transmission tower is fixedly connected to the connecting column, the connecting column is slidably connected in the bearing base, the bearing base and the lower end surface of the connecting column form a sealed cavity, the lower end surface of the connecting column is fixedly connected to a bearing spring, one end of the bearing spring away from the connecting column is fixedly connected to the bottom of the bearing base, one side of the bearing base is fixedly connected to a hydraulic pipe, and one end of the hydraulic pipe away from the bearing base is fixedly connected to a hydraulic station, and the hydraulic station is used to replenish the liquid oil in the cavity.

[0007] As a preferred solution of the present invention, a flange is fixedly connected to the lower end of the bearing base, bolts are arranged on the flange, a pile body is arranged below the flange, and the bearing base is fixedly connected to the pile body through the flange and the bolts.

[0008] As a preferred solution of the present invention, an anchoring structure is provided on the pile body, and the anchoring structure includes a slideway. There are multiple groups of slideways and the slideways are provided on the pile body. An anchoring pipe is slidably connected in the slideway.

[0009] As a preferred solution of the present invention, a rubber sleeve is provided at one end of the anchoring tube close to the axis of the pile body, and when the anchoring tube extends out of the pile body, the rubber sleeve and the slideway form a seal.

[0010] As a preferred solution of the present invention, a plurality of fracturing structures are provided on the anchor tube, and the fracturing structure includes a slide groove, which is opened on the anchor tube, a limiting block is fixedly connected in the slide groove, a pop-up tube is slidably connected in the limiting block, a support spring is nested on the pop-up tube, one end of the support spring is fixedly connected to an end of the limiting block close to the axis of the anchor tube, one end of the support spring is fixedly connected to the pop-up tube away from the limiting block, and one end of the pop-up tube away from the axis of the anchor tube abuts against the slide groove.

[0011] As a preferred solution of the present invention, the upper end of the pile body is slidably connected to a grouting structure, the grouting structure comprises a rubber disc, the rubber disc is slidably connected to the inside of the pile body, and the lower end surface of the rubber disc is fixedly connected to a slider.

[0012] As a preferred solution of the present invention, a grouting pipe is provided in the rubber disc and the sliding block, and a connecting pipe is fixedly connected to the upper end of the grouting pipe.

[0013] As a preferred solution of the present invention, the anchor pipe is inclined downward and forms an angle of 45 degrees with the pile body.

[0014] A method for installing steel pipe piles suitable for collapsible loess:

[0015] S1: drilling a hole at the installation location using an external device, the diameter of the hole being the same as the diameter of the pile body, and then installing the pile body in the hole;

[0016] S2: The external device and the connecting pipe are threadedly connected, and then the rubber disc and the slider are squeezed downward by the connecting pipe. The rubber disc and the slider slide downward to squeeze the anchoring pipe and the rubber sleeve. The anchoring pipe extends out of the slideway and is inserted into the external soil to form an anchoring effect. At the same time, the rubber sleeve enters the slideway to seal the slideway. When the anchoring pipe extends out of the slideway, the slideway no longer squeezes the pop-up tube. Under the action of the support spring, the pop-up tube extends out of the slideway and penetrates into the soil to form a secondary anchoring effect. Then, the squeezed rubber disc and the slider are pulled out and reset to the upper end of the pile body, and the external device and the connecting pipe are separated;

[0017] S3: Connect the connecting pipe to the external grouting equipment, then turn off the switch of the external grouting equipment to seal the connecting pipe, and then use the external equipment to squeeze the rubber disc and the slider downward. Because the rubber disc and the pile body are sealed and slidably connected, and the rubber sleeve seals the gap between the slideway and the anchor pipe, when the rubber disc and the slider slide downward, the air in the pile body is pressed into the anchor pipe and then discharged from the end of the anchor pipe. Because the end of the anchor pipe is inserted into the soil, the discharged air will enter the soil, causing cracks in the surrounding soil. At the same time, part of the air enters the pop-up pipe through the anchor pipe and is then discharged from the pop-up pipe. Similarly, cracks are caused in the soil near the end of the pop-up pipe. When the rubber disc and the slider reach the bottom of the pile body, the external equipment no longer squeezes the rubber disc and leaves the pile body.

[0018] S4: Turn on the switch of the external grouting equipment to connect the connecting pipe, the grouting pipe and the external grouting equipment, and then start to inject cement slurry under high pressure. The cement slurry enters the bottom of the pile body. At this time, the rubber disc and the slider are still at the bottom of the pile body. The cement slurry begins to enter the anchoring pipe due to the gravity of the rubber disc and the slider, and then fills into the soil cracks at the end of the anchoring pipe. Similarly, a part of the cement slurry enters the pop-up pipe and then fills into the soil cracks at the end of the pop-up pipe. After the cement slurry solidifies, the anchoring effect is further improved. Then the cement slurry is continuously injected into the bottom of the pile body. Under the push of the cement slurry, the rubber disc and the slider extend the inside of the pile body and slide upward. At the same time, the gravity of the rubber disc and the slider will always drive the cement slurry to fill the cracks in the soil to improve the anchoring effect. Finally, the rubber disc and the slider slide upward and reset to the top of the pile body. At this time, the cement slurry fills the entire pile body, and then the external grouting equipment is separated;

[0019] S5: The bearing base is fixed to the pile body by flanges and bolts, and then the ground of the installation area is concreted;

[0020] S6: The bottom structure of the transmission tower is fixedly connected to the connecting column by welding, and then the interior of the bearing base is injected with oil by a hydraulic station to make the bottom of the transmission tower level.

[0021] Beneficial effects of the present invention:

[0022] In the present invention, when settlement occurs, the transmission tower will slowly tilt. Through the level detector, the hydraulic station can be called to fill the bearing base with liquid oil through the hydraulic pipe at a low horizontal position. As the liquid oil in the bearing base increases, the liquid oil will push the connecting column to slide upward to lift the legs of the inclined part of the transmission tower, so that the transmission tower is not affected by ground settlement and tilts. At the same time, during installation, the sliding block and the rubber disc will slide down in the pile body for the first time, which will drive the anchor pipe and the pop-up pipe to penetrate into the soil to form a preliminary anchor. The sliding block and the rubber disc will slide down in the pile body for the second time, which will compress the air in the pile body, and the air will form cracks in the soil at the ends of the anchor pipe and the pop-up pipe. Then, cement slurry is injected into the pile body at high pressure, and the high-pressure cement slurry fills the cracks. At the same time, the sliding block and the rubber disc have gravity and the rubber disc and the pile body have friction, so the rubber disc and the pile body have a downward thrust on the cement slurry, and then the cement slurry will be more fully filled in the cracks. After the grouting is completed and the cement slurry in the cracks is solidified, the anchoring and anti-wet collapse functions are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0024] in:

[0025] Figure 1 The figure is a schematic diagram of the overall structure of a steel pipe pile suitable for collapsible loess;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0027] Figure 3 It is a schematic diagram of the connection structure of the connecting column, the bearing base and the pile body in a steel pipe pile suitable for collapsible loess;

[0028] Figure 4 It is a schematic diagram of the connection structure of a steel pipe pile suitable for collapsible loess and a pile body, a connecting pipe and a rubber disc in an installation method;

[0029] Figure 5 It is a schematic diagram of the internal connection structure of the pile body;

[0030] Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0031] Figure 7 for Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0032] In the figure:

[0033] 1. Pile structure; 11. Connecting column; 12. Bearing base; 13. Bearing spring; 14. Flange; 15. Bolt; 16. Pile body;

[0034] 2. Hydraulic station; 3. Hydraulic pipe;

[0035] 4. Anchoring structure; 41. Anchoring pipe; 42. Rubber sleeve; 43. Slideway;

[0036] 5. Fracturing structure; 51. Slide; 52. Support spring; 53. Limit block; 54. Pop-up tube;

[0037] 6. Grouting structure; 61. Sliding block; 62. Rubber disc; 63. Connecting pipe; 64. Grouting pipe;

[0038] 99. Transmission tower. DETAILED DESCRIPTION

[0039] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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.

[0040] Example

[0041] It should be noted that the steel pipe pile and installation method suitable for collapsible loess provided by the present invention are particularly suitable for tower foundations in thick self-weight collapsible loess layers.

[0042] like Figure 1 , Figure 2 and Figure 3As shown, a steel pipe pile suitable for collapsible loess includes a transmission tower 99, the transmission tower 99 is installed on a concrete ground through a pile structure 1, the pile structure 1 includes a connecting column 11, the bottom of the transmission tower 99 is fixedly connected to the connecting column 11, the connecting column 11 is slidably connected in the bearing base 12, the bearing base 12 and the lower end surface of the connecting column 11 form a sealed cavity, the lower end surface of the connecting column 11 is fixedly connected to a bearing spring 13, one end of the bearing spring 13 away from the connecting column 11 is fixedly connected to the bottom of the bearing base 12, one side of the bearing base 12 is fixedly connected to a hydraulic pipe 3, and one end of the hydraulic pipe 3 away from the bearing base 12 is fixedly connected to a hydraulic station 2, and the hydraulic station 2 is used to replenish the liquid oil in the cavity;

[0043] A flange 14 is fixedly connected to the lower end of the bearing base 12 . Bolts 15 are arranged on the flange 14 . A pile body 16 is arranged below the flange 14 . The bearing base 12 is fixedly connected to the pile body 16 via the flange 14 , the bolts 15 and the pile body 16 .

[0044] In the embodiment, when the ground settles, the transmission tower 99 will slowly tilt. The hydraulic station 2 can be called by a level detector (not shown) to fill the interior of the horizontally low bearing base 12 with liquid oil through the hydraulic pipe 3. As the liquid oil in the bearing base 12 increases, the liquid oil will push the connecting column 11 to slide upward to lift the legs of the inclined portion of the transmission tower 99, thereby causing the transmission tower 99 to tilt without being affected by ground settlement.

[0045] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the pile body 16 is provided with an anchoring structure 4, and the anchoring structure 4 includes a slideway 43. The slideways 43 are provided in multiple groups on the pile body 16, and an anchoring pipe 41 is slidably connected in the slideway 43;

[0046] A rubber sleeve 42 is provided at one end of the anchoring tube 41 close to the axis of the pile body 16. When the anchoring tube 41 extends out of the pile body 16, the rubber sleeve 42 and the slideway 43 form a seal.

[0047] The anchor pipe 41 is tilted downward and forms an angle of 45 degrees with the pile body 16 .

[0048] In the embodiment, the slider 61 slides downward in the pile body 16 to squeeze the anchor tube 41 and the rubber sleeve 42. The anchor tube 41 extends out of the slideway 43 and penetrates into the soil to form a preliminary anchor. After high-pressure gas enters the anchor tube 41, cracks will form in the soil at the end of the anchor tube 41. Then, high-pressure cement slurry will fill the cracks. After the cement slurry solidifies, secondary anchoring will be formed, so that the pile body 16 in the collapsible loess is not easy to sink.

[0049] like Figure 5 , Figure 6 and Figure 7 As shown, the anchor tube 41 is provided with a plurality of fracturing structures 5, and the fracturing structure 5 includes a slide groove 51, and the slide groove 51 is opened on the anchor tube 41, and a limiting block 53 is fixedly connected in the slide groove 51, and a pop-up tube 54 is slidably connected in the limiting block 53, and a support spring 52 is nested in the pop-up tube 54, one end of the support spring 52 is fixedly connected to an end of the limiting block 53 close to the axis of the anchor tube 41, and one end of the support spring 52 away from the limiting block 53 is fixedly connected to the pop-up tube 54, and one end of the pop-up tube 54 away from the axis of the anchor tube 41 abuts against the slide groove 43.

[0050] In the embodiment, when the anchor tube 41 extends out of the slide 43, since the slide 43 no longer suppresses the pop-up tube 54, the pop-up tube 54 pops out of the slide 51 under the action of the support spring 52 (the initial state of the support spring 52 is a compressed state) and then is stuck in the soil to form a preliminary anchor. After high-pressure gas enters the pop-up tube 54, cracks will form in the soil at the end of the pop-up tube 54, and then high-pressure cement slurry will fill the cracks. After the cement slurry solidifies, a secondary anchor is formed, which further makes the pile body 16 in the collapsible loess not easy to sink.

[0051] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the upper end of the pile body 16 is slidably connected to a grouting structure 6, and the grouting structure 6 includes a rubber disc 62, and the rubber disc 62 is slidably connected to the inside of the pile body 16, and the lower end surface of the rubber disc 62 is fixedly connected to a slider 61;

[0052] A grouting pipe 64 is provided inside the rubber disc 62 and the sliding block 61 , and a connecting pipe 63 is fixedly connected to the upper end of the grouting pipe 64 .

[0053] In the embodiment, the first time the slider 61 and the rubber disc 62 slide down in the pile body 16, the anchor pipe 41 and the pop-up pipe 54 are driven to penetrate into the soil, forming a preliminary anchoring. Then, the slider 61 and the rubber disc 62 slide upward to reset, and then the grouting pipe 64 is blocked. The slider 61 and the rubber disc 62 slide down in the pile body 16 for the second time, which compresses the air in the pile body 16. The air is discharged through the anchor pipe 41 and the pop-up pipe 54, forming cracks in the soil at the ends of the anchor pipe 41 and the pop-up pipe 54. Then, cement slurry is injected into the pile body 16 at high pressure through the connecting pipe 63 and the grouting pipe 64 (at this time, the slider 61 and the rubber disc 62 are connected according to the connection pipe 63 and the grouting pipe 64). At the bottom of the pile body 16), the high-pressure cement slurry fills the cracks through the anchor pipe 41 and the pop-up pipe 54. Because the slider 61 and the rubber disc 62 are sealed and slidably connected inside the pile body 16, and the slider 61 and the rubber disc 62 have gravity, and the rubber disc 62 and the inside of the pile body 16 have friction, the high-pressure cement slurry will continuously lift the slider 61 and the rubber disc 62. Due to the reaction force, the cement slurry will be more fully filled in the cracks. Finally, the slider 61 and the rubber disc 62 are lifted to the end of the pile body 16 by the cement slurry. At this time, the grouting is completed. After waiting for the cement slurry in the crack to solidify, it has good anchoring and anti-wet collapse functions.

[0054] A method for installing steel pipe piles suitable for collapsible loess, comprising the following steps:

[0055] S1: using an external device to drill a hole at the installation location, the diameter of the hole being the same as the diameter of the pile body 16, and then installing the pile body 16 in the hole;

[0056] S2: The external device and the connecting pipe 63 are threadedly connected, and then the rubber disc 62 and the slider 61 are squeezed downward by the connecting pipe 63. The rubber disc 62 and the slider 61 slide downward to squeeze the anchoring pipe 41 and the rubber sleeve 42. The anchoring pipe 41 extends out of the slideway 43 and is inserted into the external soil to form an anchoring effect. At the same time, the rubber sleeve 42 enters the slideway 43 to seal the slideway 43. When the anchoring pipe 41 extends out of the slideway 43, because the slideway 43 no longer squeezes the pop-up tube 54, under the action of the support spring 52, the pop-up tube 54 extends out of the slideway 51 and penetrates into the soil to form a secondary anchoring effect. Then, the squeezed rubber disc 62 and the slider 61 are pulled out and reset to the upper end of the pile body 16, and the external device and the connecting pipe 63 are separated;

[0057] S3: Connect the connecting pipe 63 to the external grouting equipment, then turn off the switch of the external grouting equipment to seal the connecting pipe 63, and then use the external equipment to squeeze the rubber disc 62 and the slider 61 downwards. Because the rubber disc 62 and the pile body 16 are sealed and slidably connected, and the rubber sleeve 42 seals the gap between the slideway 43 and the anchoring pipe 41, when the rubber disc 62 and the slider 61 slide downwards, the air in the pile body 16 is pressed into the anchoring pipe 41, and then discharged from the end of the anchoring pipe 41. Because the end of the anchoring pipe 41 is inserted into the soil, the discharged air will enter the soil, causing cracks in the surrounding soil. At the same time, part of the air enters the pop-up tube 54 through the anchoring pipe 41, and then is discharged from the pop-up tube 54. Similarly, cracks are caused in the soil near the end of the pop-up tube 54. When the rubber disc 62 and the slider 61 reach the bottom of the pile body 16, the external equipment no longer squeezes the rubber disc 62 and leaves the pile body 16.

[0058] S4: Turn on the switch of the external grouting equipment, so that the connecting pipe 63, the grouting pipe 64 and the external grouting equipment are connected, and then start to inject cement slurry under high pressure. The cement slurry enters the bottom of the pile body 16. At this time, the rubber disc 62 and the slider 61 are still located at the bottom of the pile body 16. The cement slurry begins to enter the anchor pipe 41 due to the gravity of the rubber disc 62 and the slider 61, and then fills into the soil cracks at the end of the anchor pipe 41. Similarly, part of the cement slurry enters the pop-up pipe 54, and then fills into the soil cracks at the end of the pop-up pipe 54. After the cement slurry solidifies, the anchoring effect is further improved. Then, the cement slurry is continuously injected into the bottom of the pile body 16. Under the push of the cement slurry, the rubber disc 62 and the slider 61 extend inside the pile body 16 and slide upward. At the same time, the gravity of the rubber disc 62 and the slider 61 will drive the cement slurry to fill the cracks in the soil to improve the anchoring effect. Finally, the rubber disc 62 and the slider 61 slide upward and reset to the top of the pile body 16. At this time, the cement slurry fills the entire pile body 16, and then the external grouting equipment is separated;

[0059] S5: The bearing base 12 is fixedly connected to the pile body 16 by means of the flange 14 and bolts, and then the ground of the installation area is concreted;

[0060] S6: The bottom structure of the transmission tower 99 is fixedly connected to the connection column 11 by welding, and then the hydraulic station 2 is used to inject oil into the interior of the bearing base 12 so that the bottom of the transmission tower 99 is level.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A steel pipe pile suitable for collapsible loess, comprising a transmission tower (99), wherein the transmission tower (99) is installed on a concrete ground through a pile structure (1), characterized in that: The pile structure (1) comprises a connecting column (11), the bottom of the transmission tower (99) is fixedly connected to the connecting column (11), a bearing base (12) is provided below the connecting column (11), the connecting column (11) is slidably connected in the bearing base (12), the bearing base (12) and the lower end surface of the connecting column (11) form a sealed cavity, the lower end surface of the connecting column (11) is fixedly connected to a bearing spring (13), one end of the bearing spring (13) away from the connecting column (11) is fixedly connected to the bottom of the bearing base (12), one side of the bearing base (12) is fixedly connected to a hydraulic pipe (3), one end of the hydraulic pipe (3) away from the bearing base (12) is fixedly connected to a hydraulic station (2), and the hydraulic station (2) is used to replenish the liquid oil in the cavity; A flange (14) is fixedly connected to the lower end of the bearing base (12), bolts (15) are provided on the flange (14), a pile body (16) is provided below the flange (14), and the bearing base (12) is fixedly connected to the pile body (16) via the flange (14) and the bolts (15); An anchoring structure (4) is provided on the pile body (16), the anchoring structure (4) comprises a slideway (43), the slideways (43) are provided in a plurality of groups and are provided on the pile body (16), and an anchoring tube (41) is slidably connected in the slideway (43); A rubber sleeve (42) is provided at one end of the anchoring tube (41) close to the axis of the pile body (16); when the anchoring tube (41) extends out of the pile body (16), the rubber sleeve (42) and the slideway (43) form a seal; The anchor tube (41) is provided with a plurality of fracturing structures (5), the fracturing structure (5) comprising a slide groove (51), the slide groove (51) being opened on the anchor tube (41), a limit block (53) being fixedly connected in the slide groove (51), a pop-up tube (54) being slidably connected in the limit block (53), a support spring (52) being nested in the pop-up tube (54), one end of the support spring (52) being fixedly connected to an end of the limit block (53) close to the axis of the anchor tube (41), one end of the support spring (52) being fixedly connected to an end of the limit block (53) close to the axis of the anchor tube (41), one end of the support spring (52) being far from the limit block (53) being fixedly connected to the pop-up tube (54), and one end of the pop-up tube (54) being far from the axis of the anchor tube (41) being in contact with the slide groove (43); The upper end of the pile body (16) is slidably connected to a grouting structure (6), the grouting structure (6) comprising a rubber disc (62), the rubber disc (62) is slidably connected to the inside of the pile body (16), and the lower end surface of the rubber disc (62) is fixedly connected to a sliding block (61).

2. The steel pipe pile suitable for collapsible loess as claimed in claim 1, characterized in that: A grouting pipe (64) is provided inside the rubber disc (62) and the sliding block (61), and a connecting pipe (63) is fixedly connected to the upper end of the grouting pipe (64).

3. The steel pipe pile suitable for collapsible loess as claimed in claim 2, characterized in that: The anchoring pipe (41) is inclined downward and forms an angle of 45 degrees with the pile body (16).

4. The method for installing steel pipe piles suitable for collapsible loess as claimed in claim 3, characterized in that: S1: using an external device to drill a hole at the installation location, the diameter of the hole being the same as the diameter of the pile body (16), and then installing the pile body (16) in the hole; S2: The external device and the connecting pipe (63) are threadedly connected, and then the rubber disc (62) and the slider (61) are squeezed downward by the connecting pipe (63). The rubber disc (62) and the slider (61) slide downward to squeeze the anchoring pipe (41) and the rubber sleeve (42). The anchoring pipe (41) extends out of the slideway (43) and is inserted into the external soil to form an anchoring effect. At the same time, the rubber sleeve (42) enters the slideway (43) to seal the slideway (43). When the anchoring pipe (41) extends out of the slideway (43), the slideway (43) no longer squeezes the ejection pipe (54). Under the action of the support spring (52), the ejection pipe (54) extends out of the slideway (51) and penetrates into the soil to form a secondary anchoring effect. Then, the rubber disc (62) and the slider (61) are pulled out and reset to the upper end of the pile body (16), and the external device and the connecting pipe (63) are separated; S3: Connect the connecting pipe (63) to the external grouting equipment, then turn off the switch of the external grouting equipment to seal the connecting pipe (63), and then use the external equipment to press the rubber disc (62) and the slider (61) downwards. Because the rubber disc (62) and the pile body (16) are sealed and slidably connected, and the rubber sleeve (42) seals the gap between the slideway (43) and the anchoring pipe (41), when the rubber disc (62) and the slider (61) slide downwards, the air in the pile body (16) is pressed into the anchoring pipe (41), and then the air in the pile body (16) is released from the anchoring pipe (41). The end of the pipe (41) is discharged. Since the end of the anchor pipe (41) is inserted into the soil, the discharged air enters the soil, causing cracks in the surrounding soil. At the same time, part of the air enters the pop-up pipe (54) through the anchor pipe (41) and is then discharged from the pop-up pipe (54). Similarly, cracks are caused in the soil near the end of the pop-up pipe (54). When the rubber disc (62) and the slider (61) reach the bottom of the pile body (16), the external device no longer squeezes the rubber disc (62) and leaves the pile body (16). S4: Turn on the switch of the external grouting equipment, so that the connecting pipe (63), the grouting pipe (64) and the external grouting equipment are connected, and then start to inject cement slurry under high pressure. The cement slurry enters the bottom of the pile body (16). At this time, the rubber disc (62) and the slider (61) are still located at the bottom of the pile body (16). The cement slurry begins to enter the anchor pipe (41) due to the gravity of the rubber disc (62) and the slider (61), and then fills into the soil cracks at the end of the anchor pipe (41). Similarly, a part of the cement slurry enters the pop-up pipe (54) and then fills into the end of the pop-up pipe (54). After the cement slurry solidifies, the anchoring effect is further improved. Subsequently, the cement slurry is continuously injected into the bottom of the pile body (16). Under the push of the cement slurry, the rubber disc (62) and the slider (61) extend inside the pile body (16) and slide upward. At the same time, the gravity of the rubber disc (62) and the slider (61) will continue to drive the cement slurry to fill the cracks in the soil to improve the anchoring effect. Finally, the rubber disc (62) and the slider (61) slide upward and return to the top of the pile body (16). At this time, the cement slurry fills the entire pile body (16), and then the external grouting equipment is separated; S5: The bearing base (12) is fixedly connected to the pile body (16) by means of a flange (14) and bolts, and then the ground of the installation area is concreted; S6: The bottom structure of the transmission tower (99) is fixedly connected to the connection column (11) by welding, and then the hydraulic station (2) is used to inject oil into the interior of the bearing base (12) so that the bottom of the transmission tower (99) is level.

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