A prestressed anti-buoyancy anchor pile slow-bonding anchoring device and its construction method

Abstract

This invention relates to the field of building engineering technology and discloses a prestressed anti-buoyancy anchor pile slow-bonding anchoring device and its construction method, comprising foundation soil, a waterproof membrane, an anchoring component, a concrete base slab, and a steel rod. A concrete cushion layer is poured on the foundation soil, and anchor piles are poured inside the foundation soil and the concrete cushion layer. The waterproof membrane is placed on the concrete cushion layer, and the concrete base slab is connected to the waterproof membrane and poured outside the anchoring component. The steel rod passes through the anchoring component, the waterproof membrane, and the anchor piles. A fastening nut is screwed onto the steel rod, and the fastening nut is attached to the upper steel sleeve. The cavity formed between the steel rod and the sliding sleeve is filled with a slow-bonding agent. In this invention, the anchoring component is poured together with the concrete base slab, and the anchoring component is filled with a slow-bonding agent. After stress is applied by the fastening nut, the slow-bonding agent solidifies, sealing the seepage channels, improving construction efficiency, and reducing the risk of cracking and leakage in the base slab structure.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, specifically, it relates to a prestressed anti-buoyancy anchor pile slow bonding anchoring device and its construction method. Background Technology

[0002] During urban construction, the comprehensive development and utilization of underground space can lead to buoyancy of underground structures due to groundwater levels, significantly impacting the cracking and leakage of the foundation slab. Current solutions to this buoyancy-induced damage primarily involve increasing the thickness of the foundation slab and adding tensile-resistant piles, which are costly. While non-prestressed anchor piles are cheaper, they are prone to loosening, leading to cracks and leakage in the foundation slab after the floor is sealed and the water level rises. However, the prestressed anchor piles used in recent years require pre-reserved holes in the foundation slab, creating seepage channels that may cause cracking. Furthermore, existing prestressing is concentrated at a single point in the foundation slab, making it susceptible to damage when the prestress is excessive.

[0003] To address the aforementioned problems, a prestressed anti-buoyancy anchor bolt with a slow-bonding anchoring device and its construction method were invented. The anchoring component is cast together with the concrete base slab, and the anchoring component is filled with a slow-bonding agent. After stress is applied, the slow-bonding agent solidifies, sealing the seepage channels. This improves construction efficiency and reduces the risk of cracking and leakage in the base slab structure.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A prestressed anti-buoyancy anchor pile slow bonding anchoring device includes foundation soil, waterproof membrane, anchoring components, concrete base plate and steel rod.

[0007] A concrete cushion layer is poured on the foundation soil, and anchor piles are poured inside the foundation soil and the concrete cushion layer.

[0008] The waterproof membrane is installed on the concrete cushion layer;

[0009] The anchoring assembly includes a lower supporting steel plate, a lower steel sleeve, an upper supporting steel plate, and an upper steel sleeve. The lower supporting steel plate overlaps the waterproof board, the lower steel sleeve is welded to the lower supporting steel plate, the upper supporting steel plate is welded to the top of the lower steel sleeve, and the upper steel sleeve is welded to the upper supporting steel plate. Three elastic steel plates are arranged around the upper and lower supporting steel plates. A sliding sleeve is rotatably installed on the outer wall of the lower steel sleeve. An injection hole is opened on the sliding sleeve, and the injection hole corresponds to the through hole opened on the side wall of the lower steel sleeve. A sliding seat is installed on the side wall of the sliding sleeve. A first curved surface, a switching surface, and a second curved surface are opened on the surface of the sliding seat. The switching surface is used to connect the first curved surface and the second curved surface. An extrusion plate is slidably arranged on the surface of the sliding seat, and the end of the extrusion plate is in contact with the surface of the corresponding elastic steel plate.

[0010] The bottom of the concrete base slab is connected to the waterproof slab, and the concrete base slab is poured on the outside of the anchoring component.

[0011] The steel rod passes through the anchoring assembly, the waterproof membrane, and the anchor pile. The steel rod has threads, and a fastening nut is screwed onto the threads. The fastening nut is attached to the upper steel sleeve. The cavity formed between the steel rod and the sliding sleeve is filled with a slow-adhesive.

[0012] In a preferred embodiment of the present invention, pile holes are drilled on the surface of the foundation soil and concrete cushion layer by a drilling rig, and the two pile holes have the same diameter and are vertically corresponding, and the anchor piles are installed on the pile holes.

[0013] In a preferred embodiment of the present invention, the connection between the waterproof membrane and the steel rod is filled with sealant, a number of tie bars are integrally cast inside the concrete base plate, the upper steel sleeve is filled with sealing mortar, and the sealing mortar covers the outside of the fastening nut.

[0014] In a preferred embodiment of the present invention, the centers of the lower bearing steel plate, the lower steel sleeve, the upper bearing steel plate, and the upper steel sleeve are all located on the same vertical line. The lower bearing steel plate and the upper bearing steel plate are circular plates, and threaded groove through holes are opened at the center of the lower bearing steel plate and the size of the threaded groove through holes is adapted to the thread size on the surface of the steel rod.

[0015] In a preferred embodiment of the present invention, the lower steel sleeve and the upper steel sleeve have different specifications and dimensions. The diameter of the lower steel sleeve is more than 50 mm larger than the diameter of the steel rod, the diameter of the upper steel sleeve is more than 50 mm larger than the diameter of the fastening nut, the diameter of the lower steel sleeve is smaller than the diameter of the upper steel sleeve, and the upper surface of the upper steel sleeve is flush with the top of the concrete base plate.

[0016] In a preferred embodiment of the present invention, an installation groove is provided on the outer wall of the lower steel sleeve, the through hole is provided inside the installation groove, the sliding sleeve is rotatably installed on the outside of the installation groove, the size of the through hole is adapted to the size of the injection hole, the through hole is connected to the filling cavity provided inside the sliding sleeve, and the adhesive is injected into the filling cavity.

[0017] In a preferred embodiment of the present invention, the elastic steel plate is arc-shaped, and the protrusion on the surface of the elastic steel plate is aligned with the center of the sliding sleeve, and the protrusion is in contact with the surface of the extrusion plate. L-shaped connecting seats are installed at both ends of the elastic steel plate, and the two L-shaped connecting seats are respectively in contact with the lower bearing steel plate and the upper bearing steel plate, and locking bolts are installed between them.

[0018] In a preferred embodiment of the present invention, a synchronizing rod is installed through the inside of the extrusion plate, and a limiting slider is installed at both ends of the synchronizing rod. Limiting grooves are formed on the opposing surfaces of the lower and upper supporting steel plates. The limiting sliders are slidably disposed in the corresponding limiting grooves. A limiting rod is installed through the side wall of the limiting groove. The limiting rod and the limiting slider are movably connected. A limiting spring is sleeved on the side wall of the limiting rod. One end of the limiting spring is engaged with the side wall of the limiting groove, and the other end is engaged with the side wall of the limiting slider.

[0019] In a preferred embodiment of the present invention, the curvature diameter corresponding to the first curved surface is smaller than the curvature diameter corresponding to the second curved surface, a barrier plate is installed between the lower support steel plate and the upper support steel plate, the barrier plate corresponds to the side wall of the slide, and the surface of the extrusion plate connected to the slide is chamfered.

[0020] As a preferred embodiment of the present invention, the construction method of the prestressed anti-buoyancy anchor pile slow-bonding anchoring device includes the following steps:

[0021] Step 1: Excavate the foundation soil to the design elevation, construct a concrete cushion layer, use a drilling rig to form anchor piles through grouting, and insert steel rods into the anchor piles;

[0022] Step 2: Install the waterproof membrane;

[0023] Step 3: Install the anchoring components. Insert the lower bearing steel plate, lower steel sleeve, upper bearing steel plate, and upper steel sleeve onto the steel rod. Then, fill the lower steel sleeve with a slow-adhesive through the through hole on the lower steel sleeve. After filling, the operator rotates the sliding sleeve so that the injection hole and the through hole on the sliding sleeve are staggered, thereby sealing the entire lower steel sleeve.

[0024] Step 4: During the rotation of the sliding sleeve, the sliding block on the side wall of the sliding sleeve slides synchronously. The extrusion plate is guided to slide from the first curved surface to the second curved surface through the switching surface on the sliding block. The extrusion plate is pushed to slide outward through the second curved surface, and then the extrusion plate extrudes the elastic steel plate. At this time, the elastic steel plate under the extrusion pressure extrudes the lower support steel plate and the upper support steel plate, thereby applying prestress.

[0025] Step 5: Install the concrete base slab. The concrete base slab is poured by casting, and the concrete base slab completely encloses the anchoring component.

[0026] Step Six: After the concrete of the concrete base slab reaches the design strength, use a hydraulic torque device to rotate and tighten the nuts, which will drive the steel rod to rise and apply prestress to the concrete base slab and anchor piles.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The anchoring component of the present invention is cast together with the concrete base plate. The anchoring component is filled with a slow-setting adhesive. After stress is applied by tightening the nut and the slow-setting adhesive solidifies, the seepage channel is sealed, which improves construction efficiency and reduces the risk of cracking and leakage of the base plate structure.

[0029] After the adhesive buffer is filled, the operator rotates the sliding sleeve, causing the injection holes and through holes on the sleeve to alternate, thereby sealing the entire lower steel sleeve and preventing the adhesive buffer from flowing out. During the rotation of the sliding sleeve, the sliding blocks on the sidewalls slide synchronously, guiding the extrusion plate from the first curved surface to the second curved surface via the switching surface on the sliding block. The second curved surface pushes the extrusion plate outward, causing it to press against the elastic steel plate. The elastic steel plate under this pressure then presses against the lower and upper bearing steel plates, applying prestress. By increasing the prestress application points, the stress state of the anchor pile is more reasonable, and the internal stress distribution is more uniform. This reduces localized high-stress areas caused by frequent buoyancy loading and unloading, effectively delaying fatigue damage and corrosion of the anchor pile material, extending the service life of the anti-buoyancy anchor pile, and reducing later maintenance costs.

[0030] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0031] In the attached diagram:

[0032] Figure 1 A three-dimensional structural schematic diagram of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device;

[0033] Figure 2 A side sectional view of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device;

[0034] Figure 3 A three-dimensional diagram of the anchoring components of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device;

[0035] Figure 4 A partial structural diagram of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device. Figure 1 ;

[0036] Figure 5 A prestressed anti-buoyancy anchor pile slow bonding anchoring device Figure 4 Enlarged view of point A in the middle;

[0037] Figure 6 A cross-sectional view of the anchoring component of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device;

[0038] Figure 7 A partial structural diagram of a prestressed anti-buoyancy anchor pile slow-bonding anchoring device. Figure 2 .

[0039] In the picture:

[0040] 1. Foundation soil; 11. Pile holes; 111. Anchor piles; 12. Concrete cushion layer;

[0041] 2. Waterproof membrane; 21. Sealant;

[0042] 3. Concrete base slab; 31. Tie bars;

[0043] 4. Steel rod; 41. Thread; 411. Fastening nut;

[0044] 5. Anchoring components; 51. Lower bearing steel plate; 52. Lower steel sleeve; 521. Mounting groove; 522. Through hole; 523. Sliding sleeve; 524. Injection hole; 525. Filling cavity; 526. Slowing adhesive; 53. Upper bearing steel plate; 54. Upper steel sleeve; 541. Sealing mortar; 55. Elastic steel plate; 551. L-shaped connecting seat; 552. Locking bolt; 56. Extrusion plate; 561. Synchronizing rod; 562. Limiting slider; 563. Limiting groove; 564. Limiting rod; 565. Limiting spring; 57. Slide seat; 571. First curved surface; 572. Switching surface; 573. Second curved surface; 574. Barrier plate. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0046] Example 1, such as Figures 1 to 7As shown, a prestressed anti-buoyancy anchor pile slow bonding anchoring device includes foundation soil 1, waterproof membrane 2, anchoring component 5, concrete base plate 3, and steel rod 4.

[0047] A concrete cushion layer 12 is poured on the foundation soil 1, and anchor piles 111 are poured inside the foundation soil 1 and the concrete cushion layer 12; a waterproof liner 2 is installed on the concrete cushion layer 12.

[0048] Anchoring assembly 5 includes a lower supporting steel plate 51, a lower steel sleeve 52, an upper supporting steel plate 53, and an upper steel sleeve 54. The lower supporting steel plate 51 overlaps the waterproof membrane 2. The lower steel sleeve 52 is welded to the lower supporting steel plate 51. The upper supporting steel plate 53 is welded to the top of the lower steel sleeve 52. The upper steel sleeve 54 is welded to the upper supporting steel plate 53. Three elastic steel plates 55 are arranged around the upper supporting steel plate 53 and the lower supporting steel plate 51. A sliding sleeve 523 is rotatably installed on the outer wall of the lower steel sleeve 52. The sleeve 523 is provided with an injection hole 524, which corresponds to the through hole 522 on the side wall of the lower steel sleeve 52. The side wall of the sliding sleeve 523 is equipped with a slide block 57. The surface of the slide block 57 is provided with a first curved surface 571, a switching surface 572 and a second curved surface 573. The switching surface 572 is used to connect the first curved surface 571 and the second curved surface 573. An extrusion plate 56 is slidably arranged on the surface of the slide block 57. The end of the extrusion plate 56 is in contact with the surface of the corresponding elastic steel plate 55.

[0049] The bottom of the concrete base slab 3 is connected to the waterproof membrane 2, and the concrete base slab 3 is poured on the outside of the anchoring component 5; the steel rod 4 passes through the anchoring component 5, the waterproof membrane 2 and the anchor pile 111, the steel rod 4 is threaded 41, and a fastening nut 411 is screwed on the thread, and the fastening nut 411 is attached to the upper steel sleeve 54, and the cavity formed between the steel rod 4 and the sliding sleeve 523 is filled with a slow adhesive 526.

[0050] After the adhesive retardant 526 is filled, the operator rotates the sliding sleeve 523, causing the injection hole 524 and the through hole 522 on the sliding sleeve 523 to alternate, thereby sealing the entire lower steel sleeve 52 and preventing the adhesive retardant 526 from flowing out. During the rotation of the sliding sleeve 523, the sliding block 57 on the side wall of the sliding sleeve 523 slides synchronously. The extrusion plate 56 is guided by the switching surface 572 on the sliding block 57 to slide from the first curved surface 571 to the second curved surface 573. The second curved surface 573 pushes the extrusion plate 56 outward. The compression plate 56 then compresses the elastic steel plate 55. At this time, the elastic steel plate 55, under the pressure, compresses the lower bearing steel plate 51 and the upper bearing steel plate 53, thereby applying prestress and increasing the number of prestress application positions. At this time, the stress state of the anchor pile 111 is more reasonable and the internal stress distribution is more uniform. This can reduce the local high stress areas generated during frequent buoyancy loading and unloading, effectively delay the fatigue damage and corrosion of the anchor pile material, extend the service life of the anti-buoyancy anchor pile, and reduce the later maintenance cost.

[0051] like Figures 1 to 7 As shown, in a specific embodiment, pile holes 11 are drilled on the surfaces of the foundation soil 1 and the concrete cushion layer 12 by a drilling rig. The two pile holes 11 have the same diameter and are vertically aligned. Anchor piles 111 are installed on the pile holes 11. The pile holes 11 ensure that the anchor piles 111 can be stably connected to the foundation soil 1 and the concrete cushion layer 12.

[0052] like Figures 1 to 7 As shown, furthermore, the connection between the waterproof membrane 2 and the steel rod 4 is filled with sealant 21, which can improve the sealing performance. Several pairs of tie rods 31 are integrally cast inside the concrete base slab 3, which can improve the overall structural strength of the concrete base slab 3. The upper steel sleeve 54 is filled with sealing mortar 541, which covers the outside of the fastening nut 411. The sealing mortar 541 can seal the fastening nut 411 after rotation, thus achieving the purpose of positioning.

[0053] Example 2 differs from Example 1 in that: Figures 1 to 7 As shown, the centers of the lower bearing steel plate 51, the lower steel sleeve 52, the upper bearing steel plate 53, and the upper steel sleeve 54 are all on the same vertical line. The lower bearing steel plate 51 and the upper bearing steel plate 53 are circular plates, and threaded slot through holes are opened at the center of the lower bearing steel plate 51 and the upper bearing steel plate 53. The size of the threaded slot through holes is compatible with the size of the thread 41 on the surface of the steel rod 4. Through the above structure, it can be ensured that the anchoring component 5 can be connected to the steel rod 4 by thread rotation.

[0054] like Figures 1 to 7As shown, in a specific embodiment, the lower steel sleeve 52 and the upper steel sleeve 54 have different specifications and dimensions. The diameter of the lower steel sleeve 52 is more than 50 mm larger than the diameter of the steel rod 4, and the diameter of the upper steel sleeve 54 is more than 50 mm larger than the diameter of the fastening nut 411. The diameter of the lower steel sleeve 52 is smaller than the diameter of the upper steel sleeve 54, and the upper surface of the upper steel sleeve 54 is flush with the top of the concrete base plate 3.

[0055] like Figures 1 to 7 As shown, further, an installation groove 521 is provided on the outer wall of the lower steel sleeve 52, and a through hole 522 is provided inside the installation groove 521. The sliding sleeve 523 is rotatably installed on the outside of the installation groove 521. The size of the through hole 522 is adapted to the size of the injection hole 524. The through hole 522 is connected to the filling cavity 525 provided inside the sliding sleeve 523, so that the injection hole 524 and the through hole 522 on the sliding sleeve 523 correspond. Then, the filling cavity 525 inside the lower steel sleeve 52 is filled with a slow adhesive 526 through the injection hole 524 and the through hole 522. The installation groove 521 serves to limit the rotation position.

[0056] Example 3 differs from Example 2 in that: Figures 1 to 7As shown, the elastic steel plate 55 is arc-shaped, and the protrusion on the surface of the elastic steel plate 55 is aligned with the center of the sliding sleeve 523. The protrusion is in contact with the surface of the extrusion plate 56. L-shaped connecting seats 551 are installed at both ends of the elastic steel plate 55, and the two L-shaped connecting seats 551 are respectively in contact with the lower bearing steel plate 51 and the upper bearing steel plate 53, and locking bolts 552 are installed between them. A synchronizing rod 561 is installed through the inside of the extrusion plate 56. Limiting sliders 562 are installed at both ends of the synchronizing rod 561. Limiting grooves 563 are formed on the opposing surfaces of the lower support steel plate 51 and the upper support steel plate 53. The limiting sliders 562 are slidably positioned within the corresponding limiting grooves 563. A limiting rod 564 is installed through the side wall of the limiting groove 563, and it movably passes through the limiting slider 562. A limiting spring 565 is sleeved on the side wall of the limiting rod 564. One end of the limiting spring 565 is engaged with the side wall of the limiting groove 563, and the other end is engaged with the side wall of the limiting slider 562. The curvature diameter corresponding to the first curved surface 571 is smaller than that corresponding to the second curved surface 573. A barrier plate 574 is installed between the lower support steel plate 51 and the upper support steel plate 53. The barrier plate 574 corresponds to the side wall of the slide block 57, and the surface where the extrusion plate 56 connects to the slide block 57 is chamfered. During the rotation of the sliding sleeve 523, the sliding block 57 on the side wall of the sliding sleeve 523 can slide synchronously. When the sliding block 57 moves, the contact position between the sliding block 57 and the extrusion plate 56 changes. At this time, the extrusion plate 56 is guided by the switching surface 572 on the sliding block 57 to slide from the first curved surface 571 to the second curved surface 573. Since the radius of curvature of the second curved surface 573 is large, the extrusion plate 56 is pushed to slide outward by the second curved surface 573. When the extrusion plate 56 slides, the synchronous rod 561 on the extrusion plate 56 can slide synchronously. The limiting slider 562 on the synchronous rod 561 slides on the limiting groove 563, and the limiting slider 562 is also sliding on the limiting rod 564. During the sliding motion, the limiting spring 565 is compressed synchronously. The limiting spring 565 facilitates the subsequent reset operation. When the extrusion plate 56 slides, it extrudes and compresses the arched surface of the elastic steel plate 55. At this time, the elastic steel plate 55 under the extrusion pressure compresses the lower bearing steel plate 51 and the upper bearing steel plate 53 through the L-shaped connecting seat 551, thereby applying prestress. This increases the number of prestress application positions, making the stress state of the anchor pile 111 more reasonable and the internal stress distribution more uniform. This can reduce the local high stress areas generated during frequent buoyancy loading and unloading, effectively delaying fatigue damage and corrosion of the anchor pile material, extending the service life of the anti-buoyancy anchor pile, and reducing later maintenance costs.

[0057] This invention also discloses a construction method for a prestressed anti-buoyancy anchor pile slow-bonding anchoring device, the steps of which are as follows:

[0058] Step 1: Excavate the foundation soil 1 to the design elevation, construct the concrete cushion layer 12, use a drilling rig to form anchor piles 111 by grouting, and insert steel rods 4 into the anchor piles 111.

[0059] Step 2: Install waterproof membrane 2;

[0060] Step 3: Install anchoring assembly 5. Insert the lower bearing steel plate 51, lower steel sleeve 52, upper bearing steel plate 53 and upper steel sleeve 54 onto the steel rod 4. Then, fill the lower steel sleeve 52 with adhesive 526 through the through hole 522 on the lower steel sleeve 52. After filling, the operator rotates the sliding sleeve 523 so that the injection hole 524 on the sliding sleeve 523 and the through hole 522 are staggered, thereby sealing the entire lower steel sleeve 52.

[0061] Step 4: During the rotation of the sliding sleeve 523, the sliding block 57 on the side wall of the sliding sleeve 523 slides synchronously. The extrusion plate 56 is guided by the switching surface 572 on the sliding block 57 to slide from the first curved surface 571 to the second curved surface 573. The extrusion plate 56 is pushed to slide outward by the second curved surface 573, and then the extrusion plate 56 extrudes the elastic steel plate 55. At this time, the elastic steel plate 55 under the extrusion force extrudes the lower support steel plate 51 and the upper support steel plate 53, thereby applying prestress.

[0062] Step 5: Install concrete base plate 3. Concrete base plate 3 is poured by pouring concrete, and concrete base plate 3 encloses the entire anchoring component.

[0063] Step Six: After the concrete of the concrete base slab 3 reaches the design strength, use a hydraulic torque device to rotate and tighten the nut 411, which will drive the steel rod 4 to rise and apply prestress to the concrete base slab 3 and the anchor pile 111.

[0064] The implementation principle of the prestressed anti-buoyancy anchor pile slow bonding anchoring device and its construction method of the present invention is as follows: the foundation soil 1 is excavated to the design elevation, a concrete cushion layer 12 is constructed, an anchor pile 111 is formed by drilling and grouting, a steel rod 4 is inserted into the anchor pile 111, and then a waterproof board 2 is installed.

[0065] Install the anchoring assembly 5, and insert the lower bearing steel plate 51, lower steel sleeve 52, upper bearing steel plate 53, and upper steel sleeve 54 onto the steel rod 4. Then, align the injection hole 524 and through hole 522 on the sliding sleeve 523. Next, fill the filling cavity 525 inside the lower steel sleeve 52 with a slow adhesive 526 through the injection hole 524 and through hole 522. After filling, the operator needs to rotate the sliding sleeve 523 so that the injection hole 524 and through hole 522 on the sliding sleeve 523 are staggered. At this time, the sliding sleeve 523 rotates to a certain extent, and the sliding sleeve 523 seals the through hole 522 so that the slow adhesive 526 inside the filling cavity 525 will not overflow.

[0066] During the rotation of the sliding sleeve 523, the sliding block 57 on the side wall of the sliding sleeve 523 can slide synchronously. When the sliding block 57 moves, the contact position between the sliding block 57 and the extrusion plate 56 changes. At this time, the extrusion plate 56 is guided by the switching surface 572 on the sliding block 57 to slide from the first curved surface 571 to the second curved surface 573. Since the radius of curvature of the second curved surface 573 is large, the extrusion plate 56 is pushed to slide outward by the second curved surface 573. When the extrusion plate 56 slides, the synchronous rod 561 on the extrusion plate 56 can slide synchronously. The limiting slider 562 on the synchronous rod 561 slides on the limiting groove 563, and the limiting slider 562 is also sliding on the limiting rod 564. During the sliding motion, the limiting spring 565 is compressed synchronously. The limiting spring 565 facilitates the subsequent reset operation.

[0067] When the extrusion plate 56 slides, it extrudes and compresses the arched surface of the elastic steel plate 55. At this time, the elastic steel plate 55 under the extrusion pressure compresses the lower bearing steel plate 51 and the upper bearing steel plate 53 through the L-shaped connecting seat 551, thereby applying prestress. This increases the number of prestress application positions, making the stress state of the anchor pile 111 more reasonable and the internal stress distribution more uniform. This can reduce the local high stress areas generated during frequent buoyancy loading and unloading, effectively delaying fatigue damage and corrosion of the anchor pile material, extending the service life of the anti-buoyancy anchor pile, and reducing later maintenance costs.

[0068] Next, the operator pours concrete base plate 3 by pouring, and the concrete base plate 3 encloses the entire anchoring component. The concrete base plate 3 is equipped with tie rods 31 inside, which can improve the overall structural strength of the concrete base plate 3.

[0069] After the concrete of the concrete base slab 3 reaches the design strength, a hydraulic torque device is used to rotate and tighten the nut 411, which drives the steel rod 4 to rise and apply prestress to the concrete base slab 3 and the anchor pile 111.

Claims

1. A prestressed anti-buoyancy anchor pile slow-bonding anchoring device, characterized in that, include: Foundation soil (1), on which a concrete cushion layer (12) is poured, and anchor piles (111) are poured inside the foundation soil (1) and the concrete cushion layer (12). Waterproof membrane (2), the waterproof membrane (2) is set on concrete cushion layer (12); An anchoring assembly (5) includes a lower supporting steel plate (51), a lower steel sleeve (52), an upper supporting steel plate (53), and an upper steel sleeve (54). The lower supporting steel plate (51) overlaps the waterproof membrane (2). The lower steel sleeve (52) is welded to the lower supporting steel plate (51). The upper supporting steel plate (53) is welded to the top of the lower steel sleeve (52). The upper steel sleeve (54) is welded to the upper supporting steel plate (53). Three elastic steel plates (55) are arranged around the upper supporting steel plate (53) and the lower supporting steel plate (51). A sliding sleeve (52) is rotatably installed on the outer wall of the lower steel sleeve (52). 3) An injection hole (524) is provided on the sliding sleeve (523). The injection hole (524) corresponds to the through hole (522) opened on the side wall of the lower steel sleeve (52). A sliding block (57) is installed on the side wall of the sliding sleeve (523). A first curved surface (571), a switching surface (572) and a second curved surface (573) are provided on the surface of the sliding block (57). The switching surface (572) is used to connect the first curved surface (571) and the second curved surface (573). An extrusion plate (56) is slidably arranged on the surface of the sliding block (57). The end of the extrusion plate (56) is in contact with the surface of the corresponding elastic steel plate (55). A concrete base plate (3) is connected to a waterproof membrane (2) at its bottom, and the concrete base plate (3) is poured on the outside of the anchoring component (5). A steel rod (4) passes through the anchoring assembly (5), the waterproof membrane (2) and the anchor pile (111). The steel rod (4) has a thread (41) and a fastening nut (411) is screwed onto the thread. The fastening nut (411) is attached to the upper steel sleeve (54). The cavity formed between the steel rod (4) and the sliding sleeve (523) is filled with a slow adhesive (526). The lower steel sleeve (52) has an installation groove (521) on its outer wall. The through hole (522) is opened inside the installation groove (521). The sliding sleeve (523) is rotatably installed on the outside of the installation groove (521). The size of the through hole (522) is adapted to the size of the injection hole (524). The through hole (522) is connected to the filling cavity (525) opened inside the sliding sleeve (523). The adhesive (526) is injected into the filling cavity (525).

2. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The foundation soil (1) and concrete cushion layer (12) are drilled with pile holes (11), and the two pile holes (11) have the same diameter and are vertically aligned. The anchor piles (111) are installed on the pile holes (11).

3. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The connection between the waterproof membrane (2) and the steel rod (4) is filled with sealant (21). Several pairs of tie bars (31) are integrally cast inside the concrete base plate (3). The upper steel sleeve (54) is filled with sealing mortar (541). The sealing mortar (541) covers the outside of the fastening nut (411).

4. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The centers of the lower bearing steel plate (51), the lower steel sleeve (52), the upper bearing steel plate (53), and the upper steel sleeve (54) are all on the same vertical line. The lower bearing steel plate (51) and the upper bearing steel plate (53) are circular plates, and threaded slot through holes are opened at the center of the lower bearing steel plate (51) and the upper bearing steel plate (53). The size of the threaded slot through holes is compatible with the size of the thread (41) on the surface of the steel rod (4).

5. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The lower steel sleeve (52) and the upper steel sleeve (54) have different specifications and dimensions. The diameter of the lower steel sleeve (52) is more than 50 mm larger than the diameter of the steel rod (4). The diameter of the upper steel sleeve (54) is more than 50 mm larger than the diameter of the fastening nut (411). The diameter of the lower steel sleeve (52) is smaller than the diameter of the upper steel sleeve (54). The upper surface of the upper steel sleeve (54) is flush with the top of the concrete base plate (3).

6. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The elastic steel plate (55) is arc-shaped, and the protrusion on the surface of the elastic steel plate (55) is aligned with the center of the sliding sleeve (523), and the protrusion is in contact with the surface of the extrusion plate (56). L-shaped connecting seats (551) are installed at both ends of the elastic steel plate (55), and the two L-shaped connecting seats (551) are respectively in contact with the lower bearing steel plate (51) and the upper bearing steel plate (53), and locking bolts (552) are installed between them.

7. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, A synchronizing rod (561) is installed through the inside of the extrusion plate (56). Limiting sliders (562) are installed at both ends of the synchronizing rod (561). Limiting grooves (563) are opened on the opposite surfaces of the lower support steel plate (51) and the upper support steel plate (53). The limiting sliders (562) are slidably arranged in the corresponding limiting grooves (563). A limiting rod (564) is installed through the side wall of the limiting groove (563). The limiting rod (564) is movably connected to the limiting slider (562). A limiting spring (565) is sleeved on the side wall of the limiting rod (564). One end of the limiting spring (565) is engaged with the side wall of the limiting groove (563), and the other end is engaged with the side wall of the limiting slider (562).

8. The prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to claim 1, characterized in that, The curvature diameter of the first curved surface (571) is smaller than that of the second curved surface (573). A barrier plate (574) is installed between the lower support steel plate (51) and the upper support steel plate (53). The barrier plate (574) corresponds to the side wall of the slide (57), and the surface of the extrusion plate (56) connected to the slide (57) is chamfered.

9. A construction method for a prestressed anti-buoyancy anchor pile slow-bonding anchoring device, characterized in that, The construction method for the prestressed anti-buoyancy anchor pile slow-bonding anchoring device according to any one of claims 1 to 8 is as follows: Step 1: Excavate the foundation soil (1) to the design elevation, construct a concrete cushion layer (12), use a drilling rig to form anchor piles (111) by grouting, and insert steel rods (4) into the anchor piles (111). Step 2: Install the waterproof membrane (2); Step 3: Install the anchoring assembly (5), insert the lower bearing steel plate (51), lower steel sleeve (52), upper bearing steel plate (53) and upper steel sleeve (54) onto the steel rod (4), and then fill the lower steel sleeve (52) with a slow adhesive (526) through the through hole (522) on the lower steel sleeve (52). After filling, the operator rotates the sliding sleeve (523) so that the injection hole (524) on the sliding sleeve (523) and the through hole (522) are staggered, thereby sealing the entire lower steel sleeve (52). Step 4: During the rotation of the sliding sleeve (523), the sliding block (57) on the side wall of the sliding sleeve (523) slides synchronously. The extrusion plate (56) is guided by the switching surface (572) on the sliding block (57) to slide from the first curved surface (571) to the second curved surface (573). The extrusion plate (56) is pushed to slide outward by the second curved surface (573), and then the extrusion plate (56) extrudes the elastic steel plate (55). At this time, the elastic steel plate (55) under the extrusion pressure extrudes the lower support steel plate (51) and the upper support steel plate (53), thereby applying prestress. Step 5: Install the concrete base plate (3). The concrete base plate (3) is poured by pouring, and the concrete base plate (3) covers the entire anchoring component. Step 6: After the concrete of the concrete base plate (3) reaches the design strength, use a hydraulic torque device to rotate and tighten the nut (411), which will drive the steel rod (4) to rise and apply prestress to the concrete base plate (3) and the anchor pile (111).

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