Waterproof construction method for junction of water-rich geological anti-floating anchor rod and foundation

Abstract

The application provides a waterproof construction method for the joint of a water-rich geological anti-floating anchor rod and a foundation, and relates to the technical field of anti-floating anchor rod connection. Step 1, preparing materials; step 2, after excavation is completed, the anti-floating anchor rod is constructed according to the designed position, and then a cup-shaped foundation is formed around the anti-floating anchor rod by manual excavation; step 3, after the base layer is cleaned, a concrete foundation cushion is poured, and a polyurethane waterproof layer is brushed on the foundation cushion, with the brushing thickness being controlled within 1.5-2 mm; step 4, water-swelling waterproof adhesive tape, steel plate waterproof tape, waterproof steel plate and reinforcing steel bars are additionally arranged at the bending position on the anti-floating anchor rod; step 5, then, the cup-shaped foundation is poured with slightly-expanding concrete; step 6, after pouring is completed, SBS waterproof coiled material and a waterproof protective layer are constructed on the bottom cushion of the foundation bottom plate and the upper part of the cup-shaped foundation; and step 7, after construction is completed, the foundation bottom plate steel bars are bound and the foundation bottom plate concrete is poured. The application is used to solve the problem of waterproof leakage at the joint of the anti-floating anchor rod and the foundation.

Description

Technical Field

[0001] This invention provides a waterproofing construction method for the junction of an anti-buoyancy anchor rod and a foundation in water-rich geological conditions, relating to the field of anti-buoyancy anchor rod connection technology. Background Technology

[0002] In water-rich geological conditions with high groundwater levels and abundant groundwater, anti-buoyancy anchors are typically used to prevent building structures from floating due to groundwater buoyancy. Numerous engineering applications have proven that anti-buoyancy anchor technology is the most convenient, economical, and effective measure to prevent building structure floating. However, because the anchor bars of anti-buoyancy anchors need to penetrate the waterproofing layer of the foundation slab and be anchored to the slab, and are distributed in a grid pattern at certain intervals on the foundation slab plane, this compromises the integrity of the waterproofing layer, significantly increasing the probability of leakage, especially in water-rich geological conditions. This is further exacerbated by deeper foundation pits and higher groundwater pressure. Although some methods are currently being used in certain projects, the results have not yet met expectations.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by this invention is to solve the problem of waterproofing and leakage at the junction of the anti-buoyancy anchor rod and the foundation.

[0005] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention. This invention discloses the basic concept of the technical solution adopted to solve the above-mentioned technical problems as follows:

[0006] A waterproofing construction method for the junction of an anti-buoyancy anchor and a foundation in water-rich geological conditions includes the following steps:

[0007] Step 1: Prepare materials: including anti-buoyancy anchors, rod positioners, cement mortar, reinforcing steel bars, foundation slab, foundation pad, polyurethane waterproof coating additional layer, micro-expansion concrete, SBS waterproof membrane, waterproof protective layer, waterstop steel plate, steel plate waterstop strip, polyurethane waterproof layer and water-swellable waterstop strip.

[0008] Step 2: After the excavation is completed, the anti-buoyancy anchors are installed according to the design location. After the anti-buoyancy anchors are installed, cup-shaped foundations are formed around them by manual excavation.

[0009] Step 3: After cleaning the base layer, pour the concrete foundation pad. Apply a polyurethane waterproof layer to the foundation pad, with the thickness controlled between 1.5 and 2 mm.

[0010] Step 4: Install water-swellable sealing strips, steel plate waterstops, and waterstop steel plates on the anti-buoyancy anchor rods, and add reinforcing bars at the bending parts;

[0011] Step 5: Then, pour micro-expansion concrete into the cup-shaped foundation;

[0012] Step 6: After the pouring is completed, apply SBS waterproof membrane and waterproof protective layer to the bottom layer of the foundation slab and the top of the cup-shaped foundation;

[0013] Step 7: After construction is completed, tie the reinforcement bars of the foundation slab and pour the foundation slab concrete.

[0014] The present invention first processes the anti-buoyancy anchor rod and installs the rod locator according to the design requirements. At the same time, holes are drilled according to the design position, the anti-buoyancy anchor rod is inserted into the hole, and cement mortar is injected using a grouting pipe. After the cement mortar has set for 24 hours, the site is leveled and the area around the anti-buoyancy anchor rod is manually excavated into a cup-shaped foundation.

[0015] After excavation, clean and compact the foundation, pour a concrete foundation pad, and smooth and polish the surface of the foundation pad. After the foundation pad concrete has solidified and dried, apply a polyurethane waterproof layer in three coats.

[0016] A steel plate waterstop is welded to the middle of the anti-buoyancy anchor rods within the cup-shaped foundation, with the opening facing downwards. A water-swellable sealing strip is installed on each anti-buoyancy anchor rod. The cup-shaped foundation is then poured with micro-expansion concrete of the same grade as the foundation slab, and the surface is smoothed and polished. After the concrete has hardened and dried, an additional layer of polyurethane waterproof coating is applied to the surface, extending at least 250mm beyond the edge of the cup-shaped foundation.

[0017] The next step is to attach SBS waterproof membrane to the foundation slab and to attach it to all anti-buoyancy anchors with a height of not less than 250mm. After the SBS waterproof membrane is installed, a waterproof protective layer will be applied.

[0018] Then, a water-stop steel plate is installed in the middle of the anti-buoyancy anchor rod in the foundation slab, and then reinforcing steel bars are added to the bent parts of all the anti-buoyancy anchor rods. After the foundation slab reinforcement is tied, concrete is poured.

[0019] In a further technical solution, a rod positioner is installed at the bottom of the anti-buoyancy anchor rod, and the rod positioner is adapted to control the thickness of the protective layer of the anti-buoyancy anchor rod.

[0020] In a further technical solution, in step 2, the base layer is cleaned after excavation to form a trapezoidal trench; in step 3, the soil surface of the foundation cushion is compacted and then coated with a polyurethane waterproof layer.

[0021] In a further technical solution, a hinge is installed at the bottom of the steel plate waterstop, and a bending plate is installed at the bottom of the hinge, the bending plate being adapted to abut against the bottom sides of the trapezoidal groove.

[0022] In a further technical solution, a telescopic rod is installed at the bottom of the steel plate waterstop, the top of the telescopic rod is fixedly connected to the steel plate waterstop, and a pressure block is installed at the bottom of the telescopic rod, the bottom of the pressure block being adapted to abut against the water-swellable sealing strip.

[0023] In a further technical solution, in step 2, a hole is first drilled in the trapezoidal groove, and the hole is cleaned and the inner wall of the hole is inspected;

[0024] Then, the anti-buoyancy anchor rod is sent down, and cement mortar is poured into the trapezoidal groove from the bottom. The grouting height is slightly lower than the bottom of the foundation pad by 300mm. A cup-shaped foundation is constructed in the trapezoidal groove, and a water-swellable sealing strip is installed on the top of the cup-shaped foundation.

[0025] Beneficial effects:

[0026] This invention features a foundation pad, a cup-shaped foundation, a water-swellable sealing strip, a steel plate waterstop, and a waterstop steel plate installed on top of the anti-buoyancy anchor rod, forming an effective waterproof structural system. This invention is suitable for water-rich geological conditions and can effectively solve the leakage problem at the anti-buoyancy anchor rod location.

[0027] The hinge rod of the present invention can form a bottom abutment effect, which enhances the connection effect between the steel plate waterstop and the base pad of the waterproof layer, and the telescopic rod can abut downward, thereby strengthening the closure of the water-swellable sealing strip. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the waterproofing construction method at the junction of the anti-buoyancy anchor and the foundation according to Embodiment 1 of the present invention;

[0030] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0031] Figure 3 This is a cross-sectional view of the waterproofing construction method at the junction of the anti-buoyancy anchor and the foundation according to Embodiment 2 of the present invention;

[0032] Figure 4 yes Figure 3 A magnified view of a portion of the image, B.

[0033] In the diagram: 1. Anti-buoyancy anchor; 2. Anchor body locator; 3. Cement mortar; 4. Reinforcing steel bar; 5. Foundation slab; 6. Foundation pad; 7. Additional layer of polyurethane waterproof coating; 8. Micro-expansion concrete; 9. SBS waterproof membrane; 10. Waterproof protective layer; 11. Waterstop steel plate; 12. Steel plate waterstop strip; 13. Polyurethane waterproof layer; 14. Water-swellable waterstop strip; 15. Trapezoidal groove; 16. Hinge; 17. Bending plate; 18. Telescopic rod; 19. Pressure block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figures 1 to 2 The image shows one embodiment of the present invention, a waterproofing construction method for the junction of an anti-buoyancy anchor rod and a foundation in water-rich geological conditions, comprising the following steps:

[0038] Step 1: Prepare materials, including anti-buoyancy anchor rod 1, rod locator 2, cement mortar 3, reinforcing steel bar 4, foundation slab 5, foundation pad 6, polyurethane waterproof coating additional layer 7, micro-expansion concrete 8, SBS waterproof membrane 9, waterproof protective layer 10, waterstop steel plate 11, steel plate waterstop strip 12, polyurethane waterproof layer 13, and water-swellable waterstop strip 14.

[0039] Step 2: After the excavation is completed, the anti-buoyancy anchor 1 is constructed according to the design location. After the anti-buoyancy anchor 1 is completed, the area around the anti-buoyancy anchor 1 is manually excavated to form a cup-shaped foundation.

[0040] Step 3: After cleaning the base layer, pour the concrete foundation pad 6, and apply the polyurethane waterproof layer 13 on the foundation pad 6. The coating thickness is controlled between 1.5 and 2 mm.

[0041] Step 4: Install water-swellable sealing strip 14, steel plate waterstop 12, waterstop steel plate 11 on the anti-buoyancy anchor rod 1, and add reinforcing steel bars 4 at the bending parts;

[0042] Step 5: Then, pour 8 cubic meters of micro-expansion concrete into the cup-shaped foundation.

[0043] Step 6: After the pouring is completed, SBS waterproof membrane 9 and waterproof protective layer 10 are constructed on the bottom pad of the foundation slab 5 and the upper part of the cup-shaped foundation.

[0044] Step 7: After construction is completed, tie the reinforcing bars of foundation slab 5 and pour the concrete of foundation slab 5.

[0045] like Figure 1 As shown, a rod positioner 2 is installed at the bottom of the anti-buoyancy anchor rod 1, and the rod positioner 2 is adapted to control the thickness of the protective layer of the anti-buoyancy anchor rod 1.

[0046] In step 2, the base layer is cleaned after excavation to form a trapezoidal groove 15; in step 3, the soil surface of the foundation cushion layer 6 is compacted and then coated with a polyurethane waterproof layer 13.

[0047] Working principle:

[0048] First, process the anti-buoyancy anchor rods and install the rod positioners according to the design requirements. At the same time, drill holes according to the design positions, insert the anti-buoyancy anchor rods into the holes, and inject cement mortar using grouting pipes. After the cement mortar has set for 24 hours, level the site and manually excavate the area around the anti-buoyancy anchor rods to form a cup-shaped foundation.

[0049] After excavation, clean and compact the foundation, pour a concrete foundation pad, and smooth and polish the surface of the foundation pad. After the foundation pad concrete has solidified and dried, apply a polyurethane waterproof layer in three coats.

[0050] A steel plate waterstop is welded to the middle of the anti-buoyancy anchor rods within the cup-shaped foundation, with the opening facing downwards. A water-swellable sealing strip is installed on each anti-buoyancy anchor rod. The cup-shaped foundation is then poured with micro-expansion concrete of the same grade as the foundation slab, and the surface is smoothed and polished. After the concrete has hardened and dried, an additional layer of polyurethane waterproof coating is applied to the surface, extending at least 250mm beyond the edge of the cup-shaped foundation.

[0051] The next step is to attach SBS waterproof membrane to the foundation slab and to attach it to all anti-buoyancy anchors with a height of not less than 250mm. After the SBS waterproof membrane is installed, a waterproof protective layer will be applied.

[0052] Then, a water-stop steel plate is installed in the middle of the anti-buoyancy anchor rod in the foundation slab, and then reinforcing steel bars are added to the bent parts of all the anti-buoyancy anchor rods. After the foundation slab reinforcement is tied, concrete is poured.

[0053] Example 2

[0054] like Figure 3 and 4 As shown, this is another embodiment of the present invention, which, based on Embodiment 1, aims to enhance the strength of the waterproof structural system. Figure 3As shown, a hinge 16 is installed at the bottom of the steel plate waterstop 12, and a bending plate 17 is installed at the bottom of the hinge 16. The bending plate 17 is adapted to abut against the bottom sides of the trapezoidal groove 15. A telescopic rod 18 is installed at the bottom of the steel plate waterstop 12. The top of the telescopic rod 18 is fixedly connected to the steel plate waterstop 12, and a pressing block 19 is installed at the bottom of the telescopic rod 18. The bottom of the pressing block 19 is adapted to abut against the water-swellable sealing strip 14.

[0055] In a further technical solution, in step 2, a hole is first drilled in the trapezoidal groove 15, and the hole is cleaned and the inner wall of the hole is inspected; then the anti-buoyancy anchor rod 1 is sent down, and cement mortar 3 is poured into the trapezoidal groove 15 from the bottom, and a cup-shaped foundation is constructed in the trapezoidal groove 15, and a water-swellable sealing strip 14 is installed on the top of the cup-shaped foundation.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproofing construction method for the junction of an anti-buoyancy anchor rod and a foundation in water-rich geological conditions, characterized in that, Includes the following steps: Step 1, Prepare materials: including anti-buoyancy anchor rod (1), rod locator (2), cement mortar (3), reinforcing steel bar (4), foundation slab (5), foundation pad (6), polyurethane waterproof coating additional layer (7), micro-expansion concrete (8), SBS waterproof membrane (9), waterproof protective layer (10), waterstop steel plate (11), steel plate waterstop strip (12), polyurethane waterproof layer (13), and water-swellable waterstop strip (14); Step 2: After the excavation is completed, the anti-buoyancy anchor (1) is constructed according to the design location. After the anti-buoyancy anchor (1) is completed, the area around it is excavated manually to form a cup-shaped foundation. Step 3: After cleaning the base layer, pour the concrete foundation pad (6), and apply a polyurethane waterproof layer (13) on the foundation pad (6), with the coating thickness controlled at 1.5-2mm; Step 4: Install water-swellable sealing strips (14), steel plate waterstops (12), waterstop steel plates (11) on the anti-buoyancy anchor rods (1), and add reinforcing steel bars (4) at the bending parts. A hinge (16) is installed at the bottom of the steel plate waterstop (12), and a bent plate (17) is installed at the bottom of the hinge (16), the bent plate (17) being adapted to abut against the bottom sides of the trapezoidal groove (15). The bottom of the steel plate waterstop (12) is equipped with a telescopic rod (18), the top of the telescopic rod (18) is fixedly connected to the steel plate waterstop (12), and the bottom of the telescopic rod (18) is equipped with a pressure block (19), the bottom of the pressure block (19) is adapted to abut against the water-swellable sealing strip (14). Step 5: Then pour micro-expansion concrete (8) into the cup-shaped foundation. Step 6: After the pouring is completed, SBS waterproof membrane (9) and waterproof protective layer (10) are constructed on the bottom cushion layer of the foundation slab (5) and the upper part of the cup-shaped foundation. Step 7: After construction is completed, tie the reinforcing bars of the foundation slab (5) and pour the concrete of the foundation slab (5).

2. The waterproofing construction method at the junction of the anti-buoyancy anchor and the foundation in water-rich geological conditions according to claim 1, characterized in that, The bottom of the anti-buoyancy anchor (1) is equipped with a rod locator (2), which is suitable for controlling the thickness of the protective layer of the anti-buoyancy anchor (1).

3. The waterproofing construction method at the junction of the anti-buoyancy anchor and the foundation in water-rich geological conditions according to claim 1, characterized in that, In step 2, the base layer is cleaned after excavation to form a trapezoidal trench (15); in step 3, the soil surface of the foundation cushion layer (6) is compacted and then coated with a polyurethane waterproof layer (13).

4. The waterproofing construction method at the junction of the anti-buoyancy anchor rod and the foundation in water-rich geological conditions according to claim 3, characterized in that, In step 2, a hole is first drilled in the trapezoidal groove (15), and the hole is cleaned and the inner wall of the hole is inspected; Then, the anti-buoyancy anchor rod (1) is sent down, and cement mortar (3) is poured into the trapezoidal groove (15) from the bottom, and a cup-shaped foundation is constructed in the trapezoidal groove (15).

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