Prestressed industrial and mining engineering concrete special-shaped pile and construction method thereof

Abstract

The invention discloses a prestressed industrial and mining engineering concrete special-shaped pile and a construction method thereof. The special-shaped pile comprises a pile body, a concrete foundation arranged at the end of the pile body and a prestressed anchoring part arranged in the pile body and connected with the concrete foundation. The pile body comprises a steel pipe retaining wall, a vertical rib arranged in the steel pipe retaining wall, a restraining assembly arranged on the vertical rib in a sleeving mode and a concrete pile arranged in the steel pipe retaining wall in a filling mode. The concrete foundation comprises a lower base and an upper base which are clamped at the bottom ends of the two ends of the pile body; the prestressed anchoring part comprises an anchor rod penetrating through the concrete pile and anchoring discs connected with the two ends of the prestressed anchor rod. The special-shaped pile is of an assembly type structure, the pile body and the concrete foundation are assembled in a prestress tensioning mode through the prestress anchoring part, the production technology is simple, the standardization degree of prefabricated parts is high, the construction technology is mature, the on-site assembly quality and construction efficiency of the concrete special-shaped pile can be effectively improved, and the special-shaped pile is suitable for application and popularization.

Description

Technical Field

[0001] The invention relates to the technical field of special-shaped concrete columns, and in particular to a prestressed industrial and mining engineering special-shaped concrete pile and a construction method thereof. Background Art

[0002] Prestressed engineering involves the pre-application of pressure to a structure during its construction so that during the service life of the structure, the pre-applied compressive stress can offset or reduce the tensile stress caused by external loads. This can significantly improve the bearing capacity, crack resistance and overall performance of the structure, and is especially widely used in concrete structures. Prestressed concrete special-shaped piles can play an important role in modern architecture due to their unique cross-sectional shape and the application of prestressed technology. They can not only provide a large degree of spatial freedom, but also increase the usable area of ​​the structure, reduce resource consumption, and reduce construction costs, while improving the safety and durability of the structure.

[0003] However, most of the existing special-shaped concrete piles are one-piece structures cast on site, which are difficult to construct and have high construction requirements, resulting in a long construction period for special-shaped concrete piles, which is not conducive to the development of the modern construction industry. At the same time, the connections between the various components of the existing prefabricated special-shaped concrete piles are not stable enough, and cracks will occur after long-term use, affecting the safety of the use of special-shaped concrete piles. Summary of the invention

[0004] In view of the above-mentioned technical problems, the present invention provides a prestressed industrial and mining engineering concrete special-shaped pile and a construction method thereof.

[0005] The technical scheme of the present invention is: a prestressed mining engineering concrete special-shaped pile, comprising a pile body, a concrete foundation arranged at the end of the pile body, and a prestressed anchor arranged inside the pile body and connected to the concrete foundation; the pile body comprises a steel pipe protective wall, a plurality of vertical bars equidistantly distributed inside the steel pipe protective wall, a restraint assembly sleeved on the vertical bars, and a concrete pile filled in the gap between the steel pipe protective wall and the vertical bars; a through hole is reserved inside the concrete pile;

[0006] The concrete foundation includes a lower base movably connected to the bottom of the pile body and an upper base movably connected to the top of the pile body; a positioning platform movably connected to the inner wall of the steel pipe protective wall is provided on the opposite side of the lower base and the upper base; and mounting holes are provided through the lower base and the upper base;

[0007] The prestressed anchoring piece comprises a prestressed anchor rod sleeved inside the through hole and anchor plates respectively arranged inside the mounting hole and respectively connected to two ends of the prestressed anchor rod.

[0008] Furthermore, a reinforcement restraint frame located above the restraint assembly is sleeved between the vertical ribs on both sides of the steel pipe protective wall; locking assemblies are provided at the connection between the restraint assembly, the reinforcement restraint frame and the vertical ribs;

[0009] Note: Since the center of the special-shaped column is the stress intersection area and the structure is relatively complex, the lateral expansion of the central area during the pouring of the concrete pile can be suppressed by setting a reinforced constraint frame, thereby improving the structural stability of the concrete pile; by setting a locking assembly, the displacement of the constraint assembly and the reinforced constraint frame during the pouring of the concrete pile can be avoided, thereby improving the uniformity of the internal stress of the concrete pile.

[0010] Furthermore, the locking assembly comprises a mounting sleeve sleeved on the outside of the vertical rib, a plurality of locking push rods equidistantly distributed on the inner wall of the mounting sleeve, and a driving member movably arranged on the mounting sleeve and respectively connected to each locking push rod; each locking push rod is movably hinged on the inner wall of the mounting sleeve, and each locking push rod is movably hinged at one end away from the hinge point between it and the mounting sleeve with a friction block that can be movably engaged with the vertical rib; the driving member comprises a driving rod that is arranged through the mounting sleeve and slidably engaged with each locking push rod, a pressing sleeve that is slidably engaged with the outside of the mounting sleeve and simultaneously abuts against each driving rod, and a threaded sleeve that is threadedly connected to the outside of the mounting sleeve and abuts against the upper end surface of the pressing sleeve; each driving rod is sleeved with a compression spring that abuts against the inner wall of the mounting sleeve; a wedge-shaped guide groove is arranged inside the pressing sleeve and slidably engaged with the driving rods at corresponding positions in a one-to-one manner;

[0011] Description: When in use, respectively install the constraint assembly and the reinforced constraint frame sleeve on the vertical rib through the installation sleeve; then rotate the threaded sleeve, and the pressing sleeve moves downward along the installation sleeve under the extrusion of the threaded sleeve; at this time, each driving rod approaches each other under the action of the wedge-shaped guide groove, and the corresponding locking push rod rotates along the hinge point with the installation sleeve, and finally each friction block approaches the vertical rib to lock the vertical rib.

[0012] Furthermore, the anchor plate is hollow inside, and a pre-tightening plate is movably connected to the upper end of the anchor plate, and the pre-tightening plate is movably connected to the anchor plate through an insertion rod; a plurality of shock-absorbing springs are equidistantly distributed inside the anchor plate and respectively abut against the lower bottom surface of the pre-tightening plate;

[0013] Description: When the load on the prestressed anchor changes, the preload plate compresses the shock-absorbing spring and uses the elastic deformation of the shock-absorbing spring to absorb the load energy borne by the prestressed anchor, so that the prestressed anchor always maintains a stable preload.

[0014] Furthermore, the positioning platforms on the lower base and the upper base are pre-buried with horizontal guide tubes, and the horizontal guide tubes are sleeved with threaded tie rods with both ends penetrating the steel pipe protective wall; the lower base and the upper base are pre-buried with reinforcement blocks, and each reinforcement block is provided with a vertical pull plate sleeved on the threaded tie rod at the corresponding position; the threaded tie rods are threadedly connected with fixing bolts abutting against the vertical pull plates at the corresponding positions;

[0015] Note: Using threaded tie rods and vertical pull plates to fix the lower base, upper base and steel pipe guard wall respectively is beneficial to improving the connection stability between the steel pipe guard wall and the lower base and upper base.

[0016] Furthermore, a number of horizontal conduits are arranged horizontally and equidistantly, and the number of threaded tie rods corresponds to the number of horizontal conduits; a vertical plate which is simultaneously sleeved on each threaded tie rod is slidably engaged inside the vertical pull plate; a push plate is arranged inside the vertical pull plate and below the vertical plate; the push plate is movably plugged with the vertical pull plate through a sliding rod, and a damping spring which abuts against the inner wall of the vertical pull plate is arranged at the bottom end of the sliding rod;

[0017] Description: When the threaded pull rod is inserted into the vertical plate, the vertical plate is close to the reinforcement block at the corresponding position under the joint action of the push plate and the damping spring, so that the lower base and the upper base are always close to the steel pipe guard wall.

[0018] Furthermore, a support assembly is provided between the lower base and the steel pipe protective wall; the support assembly comprises a support seat movably connected to the outer wall of the steel pipe protective wall by bolts, an adjustment rack movably hinged on the support seat, a positioning seat movably clamped on the upper end surface of the lower base, and a guide sleeve movably hinged on the positioning seat and sleeved on the outside of the adjustment rack; an adjustment gear meshingly connected with the adjustment rack is rotatably clamped on the guide sleeve; a pointed screw movably clamped with the adjustment rack is threadedly connected on the guide sleeve; a countersunk hole movably clamped with the positioning seat is provided on the upper end surface of the lower base;

[0019] Note: During the construction process, when the pile body is hoisted onto the lower base, the support assembly is used to support the pile body, which is beneficial to improving construction safety; at the same time, by rotating the adjustment gear, the adjustment rack can be moved inside the guide sleeve, thereby facilitating the adjustment of the vertical position of the pile body and improving construction convenience.

[0020] The present invention also provides a construction method for prestressed industrial and mining engineering concrete special-shaped piles, based on the above-mentioned prestressed industrial and mining engineering concrete special-shaped piles, comprising the following steps:

[0021] S1, pouring the lower base and the upper base;

[0022] S2, inserting vertical reinforcement into the steel pipe protective wall, and fixing the vertical reinforcement by limiting the position through the constraint assembly; then pouring concrete into the gap between the steel pipe protective wall and the vertical reinforcement;

[0023] S3, after the lower base, upper base and pile body are completely solidified, they are hoisted to the construction site; then the pile body is hoisted to the upper end of the lower base, so that the positioning platform on the lower base is clamped to the bottom of the steel pipe protective wall;

[0024] S4, insert the prestressed anchor rod into the mounting hole on the lower base through the through hole on the concrete pile, then hoist the upper base to the top of the pile body, and make the positioning platform on the upper base clamped on the top of the steel pipe protective wall, at this time, the top of the prestressed anchor rod is inserted into the mounting hole on the upper base;

[0025] S4. Use anchor plates to fix the two ends of the prestressed anchor rod respectively, and apply the required preload force to the prestressed anchor rod.

[0026] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0027] First, the special-shaped pile of the present invention adopts an assembled structure, and the pile body and the concrete foundation are assembled by prestressed tensioning through prestressed anchors. The production process is simple, the prefabricated components are highly standardized, and the construction process is mature, which can effectively improve the on-site assembly quality and construction efficiency of concrete special-shaped piles;

[0028] Second, the first constraint frame, the second constraint frame and the reinforced constraint frame of different shapes are arranged inside the special-shaped pile of the present invention, which improves the mutual constraint ability between the vertical bars, improves the anti-expansion ability of the center position of the pile during the pouring process, and further improves the bearing capacity and shear resistance of the pile;

[0029] Third, the present invention arranges a shock-absorbing spring inside the anchor plate, and utilizes the elastic deformation of the shock-absorbing spring to absorb the load energy borne by the prestressed anchor rod, so that the prestressed anchor rod always maintains a stable preload, thereby improving the connection stability between the pile body and the concrete foundation; during the assembly process of the pile body and the lower base, the pile body is supported by the support assembly, which is beneficial to improving the construction safety; moreover, the support assembly is used to facilitate the adjustment of the vertical position of the pile body, thereby improving the construction convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a longitudinal section view of a special-shaped pile of the present invention;

[0031] Figure 2 is a front view of the special-shaped pile of the present invention;

[0032] Figure 3 It is a distribution diagram of the first restraining frame and the second restraining frame inside the steel pipe protective wall of the present invention;

[0033] Figure 4 It is a schematic diagram of the connection between the reinforcement restraint frame and the vertical reinforcement of the present invention;

[0034] Figure 5 The present invention Figure 1 A local enlarged schematic diagram of the middle A;

[0035] Figure 6It is a schematic diagram of the connection between the threaded tie rod and the vertical tie plate of the present invention;

[0036] Figure 7 It is a schematic diagram of the connection between the prestressed anchor rod and the anchor plate of the present invention;

[0037] Figure 8 It is a schematic diagram of the connection between the locking assembly and the vertical rib of the present invention;

[0038] Fig. 9 The present invention Figure 8 A partial enlarged schematic diagram of point B in the middle;

[0039] Fig.10 It is a schematic diagram of the connection between the pressing sleeve and the driving rod of the present invention;

[0040] Fig.11 It is a schematic diagram of the connection between the adjusting rack and the guide sleeve of the present invention;

[0041] Among them, 1-pile body, 10-steel pipe wall, 11-vertical reinforcement, 12-constraint assembly, 120-first constraint frame, 121-second constraint frame, 13-concrete pile, 130-through hole, 131-stainless steel threaded pipe, 14-reinforced constraint frame, 2-concrete foundation, 20-lower base, 200-mounting hole, 21-upper base, 22-positioning platform, 23-horizontal guide tube, 230-threaded pull rod, 24-reinforcement block, 240-vertical pull plate, 241-vertical plate, 242-push plate, 2420-sliding rod, 2421-damping spring, 3 - Prestressed anchor, 30- prestressed anchor rod, 300- threaded rod, 301- fastening bolt, 31- anchor plate, 310- preload plate, 311- plug rod and anchor, 312- shock absorbing spring, 4- locking assembly, 40- mounting sleeve, 41- locking push rod, 42- driving member, 420- driving rod, 4200- compression spring, 421- pressing sleeve, 4210- wedge guide groove, 422- threaded sleeve, 43- friction block, 5- support assembly, 50- support seat, 51- adjusting rack, 52- positioning seat, 53- guide sleeve, 530- adjusting gear. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1 , 3A prestressed mining engineering concrete special-shaped pile shown in the figure comprises a pile body 1, a concrete foundation 2 arranged at the end of the pile body 1, and a prestressed anchor 3 arranged inside the pile body 1 and connected to the concrete foundation 2; the pile body 1 comprises a steel pipe protective wall 10 with a hollow interior and an L-shaped cross section, 15 vertical bars 11 equidistantly distributed inside the steel pipe protective wall 1, a constraint assembly 12 sleeved on the vertical bars 11, and a concrete pile 13 filled in the gap between the steel pipe protective wall 10 and the vertical bars 11; the constraint assembly 12 comprises a first constraint frame 120 sleeved on the vertical bars 11 on both sides of the steel pipe protective wall 10 respectively, and a second constraint frame 121 sleeved on the vertical bars 11 at the intersection inside the steel pipe protective wall 10; a through hole 130 is reserved inside the concrete pile 13;

[0044] like Figure 1 , 5 As shown, the concrete foundation 2 includes a lower base 20 movably connected to the bottom end of the pile body 1 and an upper base 21 movably connected to the top end of the pile body 1; a positioning platform 22 movably connected to the inner wall of the steel pipe protective wall 10 is provided on the opposite side of the lower base 20 and the upper base 21; and a mounting hole 200 is provided through the lower base 20 and the upper base 21;

[0045] like Figure 1 , 6 As shown, the prestressed anchor 3 includes a prestressed anchor rod 30 sleeved inside the through hole 130 and anchor plates 31 respectively arranged inside the mounting holes 200 on the lower base 20 and the upper base 21 and respectively connected to the two ends of the prestressed anchor rod 30; both ends of the prestressed anchor rod 30 are provided with threaded rods 300; the two threaded rods 300 respectively pass through the two anchor plates 31 one by one, and both ends of the two threaded rods 300 are threadedly connected with fastening bolts 301 connected to the anchor plates 31 at corresponding positions.

[0046] Example 2

[0047] This embodiment records a construction method of a prestressed industrial and mining engineering concrete special-shaped pile, based on a prestressed industrial and mining engineering concrete special-shaped pile of embodiment 1, comprising the following steps:

[0048] S1, pouring the lower base 20 and the upper base 21;

[0049] S2, inserting the vertical reinforcement 11 into the steel tube protective wall 10, and limiting and fixing the vertical reinforcement 11 by the first restraining frame 120 and the second restraining frame 121; then pouring concrete into the gap between the steel tube protective wall 10 and the vertical reinforcement 11;

[0050] S3, after the lower base 20, the upper base 21 and the pile body 1 are completely solidified, they are hoisted to the construction site; then the pile body 1 is hoisted to the upper end of the lower base 20, so that the positioning platform 22 on the lower base 20 is clamped on the inner bottom of the steel pipe protective wall 10;

[0051] S4, insert the prestressed anchor rod 30 into the mounting hole 200 on the lower base 20 through the through hole on the concrete pile 13, then hoist the upper base 21 to the top of the pile body 1, and make the positioning platform 22 on the upper base 21 clamped on the top of the steel pipe protective wall 10, at this time, the top end of the prestressed anchor rod 30 is inserted into the mounting hole 200 on the upper base 21;

[0052] S4. The anchor plates 31 are respectively mounted on the threaded rods 300 at both ends of the prestressed anchor rod 30, and the two anchor plates 31 are tightly attached to the inner walls of the corresponding mounting holes 200 by means of the fastening bolts 301; and the required pre-tightening force is applied to the prestressed anchor rod 30.

[0053] Example 3

[0054] The difference between this embodiment and embodiment 1 is that:

[0055] like Figure 1 , 4 As shown in , 8, 9, and 10, a reinforcing restraint frame 14 located above the first restraint frame 120 and the second restraint frame 121 is sleeved between the vertical ribs 11 on both sides of the interior of the steel pipe guard wall 10; locking assemblies 4 are provided at the connections between the first restraint frame 120, the second restraint frame 121, the reinforcing restraint frame 14 and the vertical ribs 11; the locking assembly 4 includes a mounting sleeve 40 sleeved on the outside of the vertical rib 11, a plurality of locking push rods 41 equidistantly distributed on the inner wall of the mounting sleeve 40, and a driving member 42 movably provided on the mounting sleeve 40 and respectively connected to each locking push rod 41; each locking push rod 41 is movably hinged on the inner wall of the mounting sleeve 40, and each locking push rod 41 is away from its One end of the hinge point with the mounting sleeve 40 is movably hinged with a friction block 43 that can be movably engaged with the vertical rib 11; the driving member 42 includes a driving rod 420 that is arranged through the mounting sleeve 40 and is slidably engaged with each locking push rod 41, a pressing sleeve 421 that is slidably engaged with the outside of the mounting sleeve 40 and simultaneously abuts against each driving rod 420, and a threaded sleeve 422 that is threadedly connected to the outside of the mounting sleeve 40 and abuts against the upper end surface of the pressing sleeve 421; each driving rod 420 is sleeved with a compression spring 4200 that abuts against the inner wall of the mounting sleeve 40; the inside of the pressing sleeve 421 is provided with a wedge-shaped guide groove 4210 that is slidably engaged with the driving rod 420 at the corresponding position.

[0056] Example 4

[0057] This embodiment describes a construction method of a prestressed mining engineering concrete special-shaped pile, which is based on a prestressed mining engineering concrete special-shaped pile of embodiment 3, and is different from embodiment 2 in that:

[0058] In step S2, the reinforced restraint frame 14 is sleeved between the vertical ribs 11 on both sides of the inside of the steel pipe guard wall 10; at this time, the installation sleeve is sleeved on the vertical ribs 11; the threaded sleeve 422 is rotated, and the pressing sleeve 421 moves downward along the installation sleeve 40 under the extrusion of the threaded sleeve 422; at this time, each driving rod 420 approaches each other under the action of the wedge-shaped guide groove 4210, and the corresponding locking push rod 41 rotates along the hinge point between it and the installation sleeve 40, and finally each friction block 43 approaches the vertical rib 11, and the vertical rib 11 is locked.

[0059] Example 5

[0060] The difference between this embodiment and embodiment 3 is that:

[0061] like Figure 7 As shown, a stainless steel threaded tube 131 is pre-buried inside the through hole 130; by pre-buried in the through hole 130 the position and shape of the through hole 130 can be prevented from changing during the pouring of the concrete pile 13, thereby ensuring that the prestressed anchor rod 30 can be smoothly inserted into the through hole 130.

[0062] Example 6

[0063] This embodiment describes a construction method of a prestressed mining engineering concrete special-shaped pile, which is based on a prestressed mining engineering concrete special-shaped pile of embodiment 5, and is different from embodiment 4 in that:

[0064] In S2 , the stainless steel threaded pipe 131 is inserted into the steel pipe protective wall 10 .

[0065] Example 7

[0066] The difference between this embodiment and embodiment 5 is that:

[0067] like Figure 7 As shown, the anchor plate 31 is hollow inside, and a pre-tightening plate 310 is movably connected to the upper end of the anchor plate 31, and the pre-tightening plate 310 is movably connected to the anchor plate 31 through an insert rod 311; there are 4 shock-absorbing springs 312 evenly distributed inside the anchor plate 31, which are respectively in contact with the lower bottom surface of the pre-tightening plate 310; when the load on the prestressed anchor rod 30 changes, the pre-tightening plate 310 compresses the shock-absorbing spring 312, and uses the elastic deformation of the shock-absorbing spring 312 to absorb the load energy borne by the prestressed anchor rod 30, so that the prestressed anchor rod 30 always maintains a stable pre-tightening force.

[0068] Example 8

[0069] The difference between this embodiment and embodiment 7 is that:

[0070] like Figure 5 , 6As shown, the positioning platforms 22 on the lower base 20 and the upper base 21 are pre-buried with horizontal guide tubes 23, and the horizontal guide tubes 23 are sleeved with threaded rods 230 with both ends penetrating the steel pipe protective wall 10; the lower base 20 and the upper base 21 are pre-buried with reinforcement blocks 24, and each reinforcement block 24 is provided with a vertical pull plate 240 sleeved on the threaded rod 230 at the corresponding position; the threaded rod 230 is threadedly connected with a fixing bolt that abuts the vertical pull plate 240 at the corresponding position; the horizontal guide tubes 23 are sleeved with threaded rods 230 at the upper base 21, and the threaded rods 230 are sleeved with threaded rods 230. There are five tubes 23 arranged horizontally and equidistantly, and the number of the threaded pull rods 230 corresponds to the number of the horizontal guide tubes 23; the vertical pull plate 240 is slidably engaged with a vertical plate 241 which is simultaneously sleeved on each threaded pull rod 230; a push plate 242 is arranged inside the vertical pull plate 240 and below the vertical plate 241; the push plate 242 is movably connected to the vertical pull plate 240 through a sliding rod 2420, and a damping spring 2421 which abuts against the inner wall of the vertical pull plate 240 is arranged at the bottom end of the sliding rod 2420.

[0071] Example 9

[0072] This embodiment describes a construction method of a prestressed mining engineering concrete special-shaped pile, which is based on a prestressed mining engineering concrete special-shaped pile of embodiment 8, and is different from embodiment 6 in that:

[0073] After step S4 is completed, the threaded tie rod 230 is inserted into the horizontal conduit 23, and the lower base 20, the upper base 21 and the steel pipe guard wall 10 are fixed respectively using the threaded tie rod 230 and the vertical pull plate 240; when the threaded tie rod 230 is inserted into the vertical plate 241, the vertical plate 241 is close to the reinforcement block 24 at the corresponding position under the joint action of the push plate 242 and the damping spring 2421, so that the lower base 20 and the upper base 21 are always close to the steel pipe guard wall 10.

[0074] Example 10

[0075] The difference between this embodiment and embodiment 8 is that:

[0076] like Figure 2 , 11 As shown, a support assembly 5 is arranged between the lower base 20 and the steel pipe guard wall 10; the support assembly 5 includes a support seat 50 movably connected to the outer wall of the steel pipe guard wall 10 by bolts, an adjusting rack 51 movably hinged on the support seat 50, a positioning seat 52 movably clamped on the upper end surface of the lower base 20, and a guide sleeve 53 movably hinged on the positioning seat 52 and sleeved on the outside of the adjusting rack 51; an adjusting gear 530 meshingly connected to the adjusting rack 51 is rotatably clamped on the guide sleeve 53; a pointed screw capable of movably clamping with the adjusting rack 51 is threadedly connected on the guide sleeve 53; a countersunk hole movably clamped with the positioning seat 52 is arranged on the upper end surface of the lower base 20.

[0077] Embodiment 11

[0078] This embodiment describes a construction method of a prestressed mining engineering concrete special-shaped pile, which is based on a prestressed mining engineering concrete special-shaped pile of embodiment 10, and is different from embodiment 9 in that:

[0079] After step S3 is completed, the pile body 1 is supported by the supporting assembly 5 , and at the same time, the adjusting gear 530 is rotated to move the adjusting rack 51 inside the guide sleeve 53 to adjust the vertical position of the pile body 1 .

Claims

1. A prestressed industrial and mining engineering concrete special-shaped pile, characterized in that: The invention comprises a pile body (1), a concrete foundation (2) arranged at the end of the pile body (1), and a prestressed anchor (3) arranged inside the pile body (1) and connected to the concrete foundation (2); the pile body (1) comprises a steel pipe protective wall (10), a plurality of vertical bars (11) equidistantly distributed inside the steel pipe protective wall (1), a restraining assembly (12) sleeved on the vertical bars (11), and a concrete pile (13) filled in the gap between the steel pipe protective wall (10) and the vertical bars (11); a through hole (130) is reserved inside the concrete pile (13); The concrete foundation (2) comprises a lower base (20) movably clamped to the bottom end of the pile body (1) and an upper base (21) movably clamped to the top end of the pile body (1); a positioning platform (22) movably clamped to the inner wall of the steel pipe protective wall (10) is provided on the opposite side of the lower base (20) and the upper base (21); and mounting holes (200) are provided through the lower base (20) and the upper base (21); The prestressed anchor member (3) comprises a prestressed anchor rod (30) sleeved inside the through hole (130) and anchor plates (31) respectively arranged inside the mounting hole (200) and respectively connected to two ends of the prestressed anchor rod (30).

2. The prestressed mining engineering concrete special-shaped pile according to claim 1, characterized in that: A reinforcing restraint frame (14) located above the restraint assembly (12) is sleeved between the vertical ribs (11) on both sides of the steel pipe protective wall (10); and locking assemblies (4) are provided at the connection between the restraint assembly (12), the reinforcing restraint frame (14) and the vertical ribs (11).

3. The prestressed mining engineering concrete special-shaped pile according to claim 2, characterized in that: The locking assembly (4) comprises a mounting sleeve (40) sleeved on the outside of the vertical rib (11), a plurality of locking push rods (41) equidistantly distributed on the inner wall of the mounting sleeve (40), and a driving member (42) movably arranged on the mounting sleeve (40) and respectively connected to each of the locking push rods (41); each of the locking push rods (41) is movably hinged on the inner wall of the mounting sleeve (40), and one end of each locking push rod (41) away from the hinge point between the locking push rod and the mounting sleeve (40) is movably hinged to a friction block (43) that can be movably engaged with the vertical rib (11); the driving member (42) comprises a friction block (43) that is arranged through the mounting sleeve (40) and is connected to the vertical rib (11). The invention relates to a drive rod (420) which is mounted on the mounting sleeve (40) and is slidably engaged with each locking push rod (41), a pressing sleeve (421) which is slidably engaged with the outside of the mounting sleeve (40) and is in contact with each drive rod (420) at the same time, and a threaded sleeve (422) which is threadedly connected to the outside of the mounting sleeve (40) and is in contact with the upper end surface of the pressing sleeve (421); each drive rod (420) is provided with a compression spring (4200) which is in contact with the inner wall of the mounting sleeve (40); a wedge-shaped guide groove (4210) which is slidably engaged with the drive rod (420) at the corresponding position is provided inside the pressing sleeve (421).

4. The prestressed mining engineering concrete special-shaped pile according to claim 1, characterized in that: The anchoring plate (31) is hollow inside, and a pre-tightening plate (310) is movably clamped on the upper end of the anchoring plate (31), and the pre-tightening plate (310) is movably plugged into the anchoring plate (31) via an insert rod (311); a plurality of shock-absorbing springs (312) are equidistantly distributed inside the anchoring plate (31) and are respectively in contact with the lower bottom surface of the pre-tightening plate (310).

5. The prestressed mining engineering concrete special-shaped pile according to claim 1, characterized in that: A horizontal guide tube (23) is embedded in the positioning platform (22) on the lower base (20) and the upper base (21), and a threaded pull rod (230) is sleeved inside the horizontal guide tube (23), both ends of which pass through the steel pipe protective wall (10); reinforcement blocks (24) are embedded in the lower base (20) and the upper base (21), and each reinforcement block (24) is provided with a vertical pull plate (240) sleeved on the threaded pull rod (230) at a corresponding position; the threaded pull rod (230) is threadedly connected with a fixing bolt that abuts the vertical pull plate (240) at a corresponding position.

6. The prestressed mining engineering concrete special-shaped pile according to claim 5, characterized in that: The horizontal conduits (23) are arranged in a number of equal intervals horizontally, and the number of the threaded pull rods (230) corresponds to the number of the horizontal conduits (23); the vertical pull plate (240) is slidably engaged with a vertical plate (241) which is simultaneously sleeved on each threaded pull rod (230); a push plate (242) is arranged inside the vertical pull plate (240) and below the vertical plate (241); the push plate (242) is movably connected to the vertical pull plate (240) through a sliding rod (2420), and a damping spring (2421) which abuts against the inner wall of the vertical pull plate (240) is arranged at the bottom end of the sliding rod (2420).

7. The prestressed mining engineering concrete special-shaped pile according to claim 1, characterized in that: A support assembly (5) is provided between the lower base (20) and the steel pipe protective wall (10); the support assembly (5) comprises a support seat (50) movably connected to the outer wall of the steel pipe protective wall (10) by bolts, an adjustment rack (51) movably hinged on the support seat (50), a positioning seat (52) movably clamped on the upper end surface of the lower base (20), and a guide sleeve (53) movably hinged on the positioning seat (52) and sleeved on the outside of the adjustment rack (51); an adjustment gear (530) meshingly connected to the adjustment rack (51) is rotatably clamped on the guide sleeve (53); a pointed screw capable of movably clamping with the adjustment rack (51) is threadedly connected on the guide sleeve (53); and a countersunk hole movably clamped with the positioning seat (52) is provided on the upper end surface of the lower base (20).

8. A construction method for prestressed industrial and mining engineering concrete special-shaped piles, based on the prestressed industrial and mining engineering concrete special-shaped piles according to any one of claims 1 to 7, characterized in that: The steps include: S1, pouring the lower base (20) and the upper base (21); S2, inserting the vertical reinforcement (11) into the steel tube protective wall (10), and limiting and fixing the vertical reinforcement (11) by means of a restraining assembly (12); and then pouring concrete into the gap between the steel tube protective wall (10) and the vertical reinforcement (11); S3, after the lower base (20), the upper base (21) and the pile body (1) are completely solidified, they are hoisted to the construction site; then the pile body (1) is hoisted to the upper end of the lower base (20), so that the positioning platform (22) on the lower base (20) is clamped to the inner bottom of the steel pipe protective wall (10); S4, inserting the prestressed anchor rod (30) into the mounting hole (200) on the lower base (20) through the through hole on the concrete pile (13), then hoisting the upper base (21) to the top of the pile body (1), and making the positioning platform (22) on the upper base (21) clamped to the top of the steel pipe protective wall (10), at this time, the top end of the prestressed anchor rod (30) is inserted into the mounting hole (200) on the upper base (21); S4. Using the anchoring plate (31) to fix the two ends of the prestressed anchor rod (30) respectively, and applying the required pre-tightening force to the prestressed anchor rod (30).

9. The prestressed mining engineering concrete special-shaped pile according to claim 8, characterized in that: A reinforcing restraint frame (14) is arranged inside the steel pipe protective wall (10).

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