Anti-floating anchor rod casing structure with waterproof function and construction method

Abstract

The application discloses a waterproof anti-floating anchor rod pile casing structure and a construction method. The casing and the anti-floating anchor rod pile form an integral whole after installation. The inner wall of the casing is provided with equidistant annular water stop plates, and the outer wall of the casing is provided with a series of variable-diameter annular grooves. The width of the annular grooves is related to the width of the rubber water stop strip. The starting point of the annular groove is provided with a clamping hole for fixing the end of the water stop strip. The lower side of the annular groove partition plate and the clamping hole at the starting point of the annular groove are both provided with wedge-shaped protrusions for clamping the water stop strip. The annular groove partition plate is engaged with the concrete structure to have the effect of the water stop plate. After the construction of the foundation cushion layer and the leveling layer, the coiled waterproof construction is performed on the outer wall of the casing. The rubber water stop strip is installed in the annular groove, and the waterproof coiled material is pressed at the same time. The application has the advantages of simple structure, effective enhancement of the strength of the anchor rod pile head, effective improvement of the waterproof performance of the anchor rod pile by the water stop plates arranged on the inner and outer walls of the casing, clamping of the water stop strip by the annular clamping groove on the outer wall of the casing, ensured waterproof closing construction quality, and great improvement of the anti-floating anchor rod engineering quality.

Description

Technical Field

[0001] This invention relates to the field of anti-buoyancy anchor construction technology, specifically to an anti-buoyancy anchor casing structure and construction method with waterproof function. Background Technology

[0002] Anti-buoyancy anchors are widely used in the construction field. The construction of anti-buoyancy anchors usually uses long spiral drilling rigs to form holes. Generally, the diameter of the anchor is 10cm to 35cm, the main reinforcement is HRB300 φ18mm to 32mm, and the number of main reinforcements is 2 to 4. After the anchor reinforcement is hoisted, grouting is carried out. The grouting material is generally mortar or cement slurry.

[0003] Current anti-buoyancy anchor construction generally does not use casings. When drilling anchor holes with a long auger, a loose, porous soil layer of approximately 80-110 cm thickness is formed in the existing ground. During anchor grouting, over-grouting is required to ensure full grouting of the anchor pile. This over-grout easily penetrates the loose, porous soil layer, and under the action of the grout, the anchor pile body consolidates with the surrounding soil to form a strong, unified structure. However, with current construction methods, the anti-buoyancy anchor head is very easily damaged during subsequent foundation excavation or anchor pile debris removal. Once damaged, the anchor head structure is incomplete, making subsequent waterproofing of the anchor head ineffective. Furthermore, the cracks formed by the damaged anchor head extend downwards to a certain depth, exposing a certain length of the anchor reinforcement directly to the underground environment, reducing the durability of the anti-buoyancy anchor. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a waterproof anti-buoyancy anchor casing structure and construction method that addresses the shortcomings of existing technologies. This structure can effectively improve the strength of the anchor pile head, enhance the waterproof performance of the anchor pile, ensure the quality of the foundation waterproofing finishing construction, and improve the overall quality of the anti-buoyancy anchor project.

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

[0006] A waterproof and anti-buoyancy anchor casing structure includes a casing 1 fitted over the head pile of the anti-buoyancy anchor. The outer wall of the casing 1 has multiple sets of annular variable-diameter grooves 3, and the inner wall of the casing 1 has multiple sets of equally spaced annular waterstop plates 4. Annular groove partition plates 2 are provided between the multiple sets of annular variable-diameter grooves 3. From bottom to top, the outer surface of the casing 1 is constructed with a foundation pad, a waterproof leveling layer 12, a waterproof membrane 11, and a waterproof protective layer 10. A rubber waterstop strip 5 is provided on the outer ring of the annular variable-diameter groove 3 in contact with the waterproof membrane 11. The rubber waterstop strip 5 presses the waterproof membrane 11 tightly against the adjacent annular groove partition plate 2. Any remaining annular partition plates in the annular grooves without rubber waterstop strips do not need to be removed; they act as waterstop plates during the pouring of the pad, waterproof protective layer, or structural concrete, providing a certain degree of waterproofing.

[0007] Furthermore, the annular variable diameter groove 3 has a starting point locking hole 7 at the starting point of the variable diameter, which is 2cm deep and has a closed structure on all sides and at the bottom, for fixing the starting end when installing the rubber waterstop strip; the bottom of the annular groove partition plate 2 and the starting point locking hole 7 are both provided with wedge-shaped protrusions 9, which are 1mm high and have outward bevels, to facilitate clamping and fixing the rubber waterstop strip; the annular groove partition plate 2 interlocks with the concrete structure to have a waterstop effect.

[0008] Furthermore, the casing is installed after the main reinforcement of the anchor rod is hoisted and before grouting. Its rough inner wall allows it to be well bonded with the grout of the anti-buoyancy anchor rod. After the anchor rod is grouted, it forms a whole with the anchor pile.

[0009] Furthermore, the initial installation height of the annular variable diameter groove 3 inside the casing is 6cm, and the radius of the annular variable diameter groove 3 gradually increases from R2 to R1 (R2=R1-2cm), and the diameter change is completed within a 90° range.

[0010] Furthermore, the annular waterstop 4 is evenly arranged on the inner wall of the casing with a spacing of 5cm. The width of the annular waterstop 4 is related to the design diameter of the anti-buoyancy anchor rod. The size of the central hole should be such that the main reinforcement of the anchor rod and the grouting pipe can pass smoothly through. In this example, the width of the annular waterstop 4 is in the range of 3 to 10cm.

[0011] Furthermore, the spacing of the annular groove partition plate 2 is adapted to the thickness of the rubber waterstop strip 5 and the thickness and quantity of the waterproof membrane 11, and the specific calculation formula is as follows:

[0012] L=(H1+H2×N)-2mm

[0013] In the formula, L is the spacing of the annular groove partition plate, H1 is the thickness of the rubber waterstop strip, H2 is the thickness of the waterproof membrane, and N is the number of layers of the waterproof membrane.

[0014] Furthermore, the casing 1 is made of metal with a thickness of not less than 1 mm or PVC plastic with a thickness of not less than 2 mm. The radius of the casing 1 is 1 cm smaller than the design radius of the anti-buoyancy anchor rod. The casing length is 25 cm, with the top surface of the cushion layer as the boundary, and the lengths above and below are 10 cm and 15 cm respectively.

[0015] Furthermore, other auxiliary structures such as the annular waterstop plate on the inner wall of the casing and the annular groove partition plate on the outer wall are part of the casing and are manufactured simultaneously with the casing; and the thickness of the annular waterstop plate and the annular groove partition plate on the outer wall is consistent with the thickness of the casing wall.

[0016] Furthermore, before the casing is installed, the annular groove should be tightly covered and protected with heat-shrink film or other reliable methods on its outer wall to prevent the grout from solidifying and sealing the annular groove during the anchor grouting construction; the heat-shrink film or other protective film should be removed after the soil is cleared to expose the anti-buoyancy anchor pile head or before the cushion layer is poured.

[0017] Furthermore, the waterproof membrane 11 is tightly fitted to the adjacent annular groove partition plate 2 and the outer wall 6 of the protective sleeve.

[0018] Furthermore, the length of the rubber waterstop strip 5 is greater than the circumference of the annular variable diameter groove 3, and the rubber waterstop strip 5 is set along the outer ring of the annular variable diameter groove 3 starting from the starting point hole 7 and forming a rubber waterstop strip overlap surface 8 at the starting point hole 7.

[0019] Furthermore, the overlapping surfaces 8 of the rubber waterstop strip are bonded and fixed with an adhesive material.

[0020] Based on the same inventive concept, this application also provides a construction method for a waterproof and anti-buoyancy anchor casing structure, which specifically includes the following steps based on the anti-buoyancy anchor casing structure described above:

[0021] S1, Measure and locate the construction position of the anti-buoyancy anchor bolt, and use a long spiral drilling rig to form the hole;

[0022] S2, fabricate anti-buoyancy anchor bars and hoist them into the anchor holes;

[0023] S3, anti-buoyancy anchor casing is customized according to the design parameters of anti-buoyancy anchor bolt;

[0024] (Among them, the outer wall of the casing is provided with six annular variable diameter grooves, with four grooves above and two grooves below the top surface of the cushion layer. The number of annular variable diameter grooves fully takes into account the installation error of the casing and the pouring error of the cushion layer.)

[0025] S4, heat shrink film is used to tightly cover and protect the annular diameter-changing groove on the outer wall of the casing;

[0026] S5, using auxiliary installation tools, the anti-buoyancy anchor casing is installed to the outside of the anti-buoyancy anchor head pile;

[0027] S6, prepare the grout and carry out anti-buoyancy anchor grouting construction;

[0028] S7, after grouting is completed, natural curing and soil removal are carried out;

[0029] S8, Remove the protective film from the annular diameter-changing groove on the outer wall of the casing;

[0030] S9, Construction of foundation cushion layer and waterproof leveling layer: After the cushion layer is poured, the waterproof leveling layer is constructed to level the cushion layer at the anti-buoyancy anchor pile head and the nearest annular groove partition plate on the cushion surface. The thickness of the waterproof leveling layer is generally 1 to 2 cm.

[0031] S10, After the waterproof leveling layer is completed, the waterproof membrane is installed, extending to the outer wall of the casing (i.e., the inner wall of the annular groove).

[0032] S11, Install a rubber waterstop strip on the outer ring of the annular reducing groove that contacts the waterproof membrane, and press the waterproof membrane tightly against the partition plate of the adjacent annular groove;

[0033] (Specifically, first insert one end of the waterstop strip into the starting hole of the annular groove to a depth L2 of 2cm. Press the rubber waterstop strip into the groove along the annular groove, ensuring that the rubber waterstop strip is taut and wrinkle-free during this process. After the rubber waterstop strip has circled the annular groove once, it should be pressed in a distance L1 of 3cm beyond the starting hole of the annular groove, which is the overlap length of the rubber waterstop strip. The overlap surface of the rubber waterstop strip should be reliably bonded. While tightly pressing the rubber waterstop strip embedded in the annular groove, the waterproof membrane below should be squeezed and further compacted. The rubber waterstop strip is only applied in the annular groove that is in contact with the waterproof membrane; the remaining annular groove is not treated in any way.)

[0034] S12 involves chiseling and trimming the portion outside the anti-buoyancy anchor casing to form a complete anchor pile surface, followed by conventional waterproofing protective layer construction on the pile surface and anchor reinforcement.

[0035] The auxiliary installation tool includes multiple 10mm auxiliary tool steel reinforcement skeletons 13. The multiple auxiliary tool steel reinforcement skeletons 13 are welded to the skeleton welding points 14 on the circumference of the ring steel reinforcement to form a cylindrical structure. The bottom end of the auxiliary tool steel reinforcement skeleton 13 is provided with a U-shaped fork 15, which is used to fix the upper edge of the protective casing when installing the protective casing 1.

[0036] Compared with the prior art, the present invention has the following main advantages:

[0037] 1. This invention provides a permanent casing for the anchor pile head, which forms an integral whole with the anchor pile during grouting, increasing the strength of the pile head. Furthermore, the casing's isolation effect prevents the anchor pile head from solidifying with the surrounding soil, thus effectively protecting the anchor pile head during subsequent construction processes and improving the construction quality and working durability of the anti-buoyancy anchor.

[0038] 2. The multiple annular waterstops on the inner wall of the casing and the annular groove partition plate on the outer wall of the casing fully interlock with the various types of concrete inside and outside the casing, effectively improving the waterproof performance of the anti-buoyancy anchor pile head itself.

[0039] 3. The special-width variable-diameter annular groove set on the outer wall of the casing can reliably and tightly fix the rubber waterstop and waterproof membrane, improving the construction quality of the anti-buoyancy anchor. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a waterproof and anti-buoyancy anchor casing structure according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the cross-section of the variable diameter annular groove on the outer wall of the casing in an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the waterproofing construction details of the outer wall of the anti-buoyancy anchor pile head casing in an embodiment of the present invention;

[0043] Figure 4 This is a flowchart illustrating a construction method for a waterproof and buoyancy-resistant anchor casing structure according to an embodiment of the present invention.

[0044] Figure 5 This is a schematic diagram of the auxiliary installation tool for the casing in an embodiment of the present invention.

[0045] In the diagram: 1- Waterproof anti-buoyancy anchor casing (hereinafter referred to as casing); 2- Annular groove partition plate; 3- Annular diameter reducing groove; 4- Annular waterstop plate; 5- Rubber waterstop strip; 6- Outer wall of casing; 7- Starting point locking hole; 8- Rubber waterstop strip overlap surface; 9- Wedge-shaped protrusion; 10- Waterproof protective layer; 11- Waterproof membrane; 12- Foundation pad and waterproof leveling layer; 13- Auxiliary tool steel reinforcement skeleton; 14- Skeleton welding point; 15- U-shaped fork. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0047] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0048] I. A waterproof and buoyancy-resistant anchor casing structure

[0049] like Figures 1-3 As shown, the present invention provides a waterproof anti-buoyancy anchor bolt casing structure, including a casing 1 sleeved on the outside of the anti-buoyancy anchor bolt head pile.

[0050] The outer wall of the casing 1 is provided with multiple sets of annular variable diameter grooves 3, the inner wall of the casing 1 is provided with multiple sets of annular waterstop plates 4 at equal intervals, and annular groove partition plates 2 are provided between the multiple sets of annular variable diameter grooves 3.

[0051] The outer surface of the casing 1 is constructed from bottom to top with a foundation pad, a waterproof leveling layer 12, a waterproof membrane 11, and a waterproof protective layer 10. The outer ring of the annular variable diameter groove 3 that contacts the waterproof membrane 11 is provided with a rubber waterstop strip 5. The rubber waterstop strip 5 presses the waterproof membrane 11 tightly against the adjacent annular groove partition plate 2. The annular groove partition plate 2 interlocks with the concrete structure and has a waterstop effect.

[0052] Furthermore, the casing is installed after the main reinforcement of the anchor rod is hoisted and before grouting. Its rough inner wall allows it to be well bonded with the grout of the anti-buoyancy anchor rod. After the anchor rod is grouted, it forms a whole with the anchor pile.

[0053] Furthermore, the annular variable diameter groove 3 has a starting point locking hole 7 at the starting point of the variable diameter, which is 2cm deep and has a closed structure on all sides and at the bottom, for fixing the starting end when installing the rubber waterstop strip; the bottom of the annular groove partition plate 2 and the starting point locking hole 7 are both provided with wedge-shaped protrusions 9, which are 1mm high and have outward bevels, to facilitate clamping and fixing the rubber waterstop strip.

[0054] Furthermore, the initial installation height of the annular variable diameter groove 3 inside the casing is 6cm, and the radius of the annular variable diameter groove 3 gradually increases from R2 to R1 (R2=R1-2cm), and the diameter change is completed within a 90° range.

[0055] Furthermore, the annular waterstop 4 is evenly arranged on the inner wall of the casing with a spacing of 5cm. The width of the annular waterstop 4 is related to the design diameter of the anti-buoyancy anchor rod. The size of the central hole should be such that the main reinforcement of the anchor rod and the grouting pipe can pass smoothly through. In this example, the width of the annular waterstop 4 is in the range of 3 to 10cm.

[0056] Furthermore, the spacing of the annular groove partition plate 2 is adapted to the thickness of the rubber waterstop strip 5 and the thickness and quantity of the waterproof membrane 11, and the specific calculation formula is as follows:

[0057] L=(H1+H2×N)-2mm

[0058] In the formula, L is the spacing of the annular groove partition plate, H1 is the thickness of the rubber waterstop strip, H2 is the thickness of the waterproof membrane, and N is the number of layers of the waterproof membrane.

[0059] Furthermore, the casing 1 is made of metal with a thickness of not less than 1 mm or PVC plastic with a thickness of not less than 2 mm. The radius of the casing 1 is 1 cm smaller than the design radius of the anti-buoyancy anchor rod. The casing length is 25 cm, with the top surface of the cushion layer as the boundary, and the lengths above and below are 10 cm and 15 cm respectively.

[0060] Furthermore, other auxiliary structures such as the annular waterstop plate on the inner wall of the casing and the annular groove partition plate on the outer wall are part of the casing and are manufactured simultaneously with the casing; and the thickness of the annular waterstop plate and the annular groove partition plate on the outer wall is consistent with the thickness of the casing wall.

[0061] Furthermore, before the casing is installed, the annular groove should be tightly covered and protected with heat-shrink film or other reliable methods on its outer wall to prevent the grout from solidifying and sealing the annular groove during the anchor grouting construction; the heat-shrink film or other protective film should be removed after the soil is cleared to expose the anti-buoyancy anchor pile head or before the cushion layer is poured.

[0062] Furthermore, the waterproof membrane 11 is tightly fitted to the adjacent annular groove partition plate 2 and the outer wall 6 of the protective sleeve.

[0063] Furthermore, the length of the rubber waterstop strip 5 is greater than the circumference of the annular variable diameter groove 3, and the rubber waterstop strip 5 is set along the outer ring of the annular variable diameter groove 3 starting from the starting point hole 7 and forming a rubber waterstop strip overlap surface 8 at the starting point hole 7.

[0064] Furthermore, the overlapping surfaces 8 of the rubber waterstop strip are bonded and fixed with an adhesive material.

[0065] II. A construction method for a waterproof and buoyancy-resistant anchor casing structure.

[0066] Based on the same inventive concept, this application also provides a construction method for a waterproof and anti-buoyancy anchor casing structure, based on the anti-buoyancy anchor casing structure described above, such as Figure 4 As shown, the specific steps include the following:

[0067] S1, Measure and locate the construction position of the anti-buoyancy anchor bolt, and use a long spiral drilling rig to form the hole;

[0068] S2, fabricate anti-buoyancy anchor bars and hoist them into the anchor holes;

[0069] S3, anti-buoyancy anchor casing is customized according to the design parameters of anti-buoyancy anchor bolt;

[0070] (Among them, the outer wall of the casing is provided with six annular variable diameter grooves, with four grooves above and two grooves below the top surface of the cushion layer. The number of annular variable diameter grooves fully takes into account the installation error of the casing and the pouring error of the cushion layer.)

[0071] S4, heat shrink film is used to tightly cover and protect the annular diameter-changing groove on the outer wall of the casing;

[0072] S5, using auxiliary installation tools, the anti-buoyancy anchor casing is installed to the outside of the anti-buoyancy anchor head pile;

[0073] S6, prepare the grout and carry out anti-buoyancy anchor grouting construction;

[0074] S7, after grouting is completed, natural curing and soil removal are carried out;

[0075] S8, Remove the protective film from the annular diameter-changing groove on the outer wall of the casing;

[0076] S9, Construction of foundation cushion layer and waterproof leveling layer: After the cushion layer is poured, the waterproof leveling layer is constructed to level the cushion layer at the anti-buoyancy anchor pile head and the nearest annular groove partition plate on the cushion surface. The thickness of the waterproof leveling layer is generally 1 to 2 cm.

[0077] S10, After the waterproof leveling layer is completed, the waterproof membrane is installed, extending to the outer wall of the casing (i.e., the inner wall of the annular groove).

[0078] S11, Install a rubber waterstop strip on the outer ring of the annular reducing groove that contacts the waterproof membrane, and press the waterproof membrane tightly against the partition plate of the adjacent annular groove;

[0079] (Specifically, first insert one end of the waterstop strip into the starting hole of the annular groove to a depth L2 of 2cm. Press the rubber waterstop strip into the groove along the annular groove, ensuring that the rubber waterstop strip is taut and wrinkle-free during this process. After the rubber waterstop strip has circled the annular groove once, it should be pressed in a distance L1 of 3cm beyond the starting hole of the annular groove, which is the overlap length of the rubber waterstop strip. The overlap surface of the rubber waterstop strip should be reliably bonded. While tightly pressing the rubber waterstop strip embedded in the annular groove, the waterproof membrane below should be squeezed and further compacted. The rubber waterstop strip is only applied in the annular groove that is in contact with the waterproof membrane; the remaining annular groove is not treated in any way.)

[0080] S12 involves chiseling and trimming the portion outside the anti-buoyancy anchor casing to form a complete anchor pile surface, followed by conventional waterproofing protective layer construction on the pile surface and anchor reinforcement.

[0081] like Figure 5As shown, the auxiliary installation tool includes multiple 10mm auxiliary tool steel reinforcement skeletons 13. The multiple auxiliary tool steel reinforcement skeletons 13 are welded to the skeleton welding points 14 on the circumference of the ring steel reinforcement to form a cylindrical structure. The bottom end of the auxiliary tool steel reinforcement skeleton 13 is provided with a U-shaped fork 15, which is used to fix the upper edge of the protective casing when installing the protective casing 1.

[0082] In summary:

[0083] 1. This invention provides a permanent casing for the anchor pile head, which forms an integral whole with the anchor pile during grouting, increasing the strength of the pile head. Furthermore, the casing's isolation effect prevents the anchor pile head from solidifying with the surrounding soil, thus effectively protecting the anchor pile head during subsequent construction processes and improving the construction quality and working durability of the anti-buoyancy anchor.

[0084] 2. The multiple annular waterstops on the inner wall of the casing and the annular groove partition plate on the outer wall of the casing fully interlock with the various types of concrete inside and outside the casing, effectively improving the waterproof performance of the anti-buoyancy anchor pile head itself.

[0085] 3. The special-width variable-diameter annular groove set on the outer wall of the casing can reliably and tightly fix the rubber waterstop and waterproof membrane, improving the construction quality of the anti-buoyancy anchor.

[0086] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for a waterproof and buoyancy-resistant anchor casing structure, characterized in that: The anti-buoyancy anchor casing structure includes a casing (1) fitted outside the anti-buoyancy anchor head pile. The outer wall of the casing (1) has multiple sets of annular variable diameter grooves (3). The inner wall of the casing (1) is provided with multiple sets of annular waterstop plates (4) at equal intervals. Annular groove partition plates (2) are provided between the multiple sets of annular variable diameter grooves (3). The outer side of the casing (1) is constructed from bottom to top with a foundation pad layer and a waterproof leveling layer (12), a waterproof membrane (11) and a waterproof protective layer (10). The outer ring of the annular variable diameter groove (3) in contact with the waterproof membrane (11) is provided with a rubber waterstop strip (5). The rubber waterstop strip (5) presses the waterproof membrane (11) onto the adjacent annular groove partition plate (2). The annular variable diameter groove (3) has a starting point hole (7) for fixing the end of the rubber waterstop strip at the starting point of the variable diameter. The bottom of the annular groove partition plate (2) and the starting point hole (7) are both provided with wedge-shaped protrusions (9). The radius of the annular variable diameter groove (3) gradually increases from R2 to R1, and the diameter change is completed within a 90° range; The construction method includes the following steps: S1, Measure and locate the construction position of the anti-buoyancy anchor bolt, and use a long spiral drilling rig to form the hole; S2, fabricate anti-buoyancy anchor bars and hoist them into the anchor holes; S3, anti-buoyancy anchor casing is customized according to the design parameters of anti-buoyancy anchor bolt; S4, heat shrink film is used to tightly cover and protect the annular diameter-changing groove on the outer wall of the casing; S5, using auxiliary installation tools, the anti-buoyancy anchor casing is installed to the outside of the anti-buoyancy anchor head pile; S6, carry out grout preparation and anti-buoyancy anchor grouting construction; S7, after grouting is completed, natural curing and soil removal are carried out; S8, Remove the protective film from the annular diameter-changing groove on the outer wall of the casing; S9, Construction of foundation cushion layer and waterproof leveling layer: After the cushion layer is poured, the waterproof leveling layer is constructed to level the cushion layer at the anti-buoyancy anchor pile head and the nearest annular groove partition plate on the cushion surface. S10, After the waterproof leveling layer is completed, the waterproof membrane is installed, extending to the outer wall of the casing. S11, Install a rubber waterstop strip on the outer ring of the annular reducing groove that contacts the waterproof membrane, and press the waterproof membrane tightly onto the partition plate of the adjacent annular groove; wherein, when installing the rubber waterstop strip, first insert one end of the waterstop strip into the starting hole of the annular groove, press the rubber waterstop strip into the groove along the annular groove, and after the rubber waterstop strip has circled the annular groove once, it should continue to be pressed into the groove for a certain distance beyond the starting hole of the annular groove to form the overlapping surface of the rubber waterstop strip, and the overlapping surface of the rubber waterstop strip is reliably bonded. S12 involves chiseling and trimming the portion outside the anti-buoyancy anchor casing to form a complete anchor pile surface, followed by conventional waterproofing protective layer construction on the pile surface and anchor reinforcement.

2. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 1, characterized in that, The spacing of the annular groove partition plate (2) is adapted to the thickness of the rubber waterstop strip (5), the thickness and quantity of the waterproof membrane (11), and the specific calculation formula is as follows: L = (H1 + H2 × N) - 2mm In the formula, L is the spacing of the annular groove partition plate, H1 is the thickness of the rubber waterstop strip, H2 is the thickness of the waterproof membrane, and N is the number of layers of the waterproof membrane.

3. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 1, characterized in that, The casing (1) is made of metal with a thickness of not less than 1 mm or PVC plastic with a thickness of not less than 2 mm, and the radius of the casing (1) is smaller than the design radius of the anti-buoyancy anchor rod.

4. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 1, characterized in that, The waterproof membrane (11) is tightly fitted to the adjacent annular groove partition plate (2) and the outer wall of the protective sleeve (6).

5. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 1, characterized in that, The length of the rubber waterstop strip (5) is greater than the circumference of the annular variable diameter groove (3). The rubber waterstop strip (5) is set along the outer circle of the annular variable diameter groove (3) starting from the starting point hole (7) and forming a rubber waterstop strip overlap surface (8) at the starting point hole (7).

6. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 5, characterized in that, The overlapping surface (8) of the rubber waterstop strip is fixed by adhesive material.

7. The construction method of a waterproof and anti-buoyancy anchor casing structure according to claim 1, characterized in that, The auxiliary installation tool includes multiple auxiliary tool steel reinforcement skeletons (13), which are welded to the skeleton welding points (14) on the circumference of the ring steel reinforcement to form a cylindrical structure. The bottom end of the auxiliary tool steel reinforcement skeleton (13) is provided with a U-shaped fork (15) that matches the upper edge of the protective sleeve (1).

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