Anti-floating anchor end waterproof structure, construction method and application of anti-floating anchor end waterproof structure

Abstract

The invention discloses an anti-floating anchor end waterproof structure which comprises an anti-floating anchor, a cement-based capillary crystalline waterproof coating, a water swelling rubber strip, polysulfide caulking paste, polymer cement waterproof mortar, a waterproof layer and a waterproof protection layer. A structural body is formed by an anti-floating anchor rod, a limiting steel bar and a cushion layer, the anti-floating anchor rod is fixed in a pre-drilled hole and is limited and fixed through the limiting steel bar, and the hole is filled with cement mortar to be solid; and the cement-based permeable crystallization waterproof coating, the polymer cement waterproof mortar, the waterproof layer and the waterproof protection layer are sequentially arranged above the cushion layer to form the anti-floating anchor end waterproof structure. The anti-floating anchor end waterproof measure is enhanced, the anti-floating anchor end water seepage problem is solved, the basement bottom plate water seepage problem is obviously improved, and the anti-floating anchor end waterproof structure can serve as a standard structure and method, can be applied and popularized in corresponding fields and has good popularization value.

Description

Technical Field

[0001] This invention belongs to the field of anti-buoyancy anchor construction, specifically relating to an anti-buoyancy anchor end waterproof structure, construction method and application. Background Technology

[0002] Before foundation construction after excavation, anti-buoyancy anchors are typically installed to resist upward displacement of the underground structure caused by groundwater. These anchors are inserted into holes drilled with a drilling machine, followed by grouting. Sufficient length is left at the top for simultaneous pouring with the raft foundation concrete, forming an anchoring system. The pull-out force of the anchors resists the buoyancy of the underground structure. However, this method requires the anchors to penetrate the subbase and the waterproofing layer of the base slab, creating leakage points in the entire waterproofing system. If these leaks are not addressed, they can lead to large-scale leakage throughout the basement floor slab. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a waterproof structure, construction method and application for the end of an anti-buoyancy anchor rod, which solves the waterproof problem of the pile head of the anti-buoyancy anchor rod in the prior art, and at the same time has a significant improvement effect on the problem of water seepage in the basement floor.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A waterproof structure for the end of an anti-buoyancy anchor includes an anti-buoyancy anchor, a cement-based penetrating crystalline waterproof coating, a water-swellable rubber strip, polysulfide caulking compound, polymer cement waterproof mortar, a waterproof layer, and a waterproof protective layer. The structure is formed by the anti-buoyancy anchor, limiting steel bars, and a pad layer. The anti-buoyancy anchor is fixed in a pre-drilled hole and limited and fixed by the limiting steel bars. The hole is filled with cement mortar. The cement-based penetrating crystalline waterproof coating, polymer cement waterproof mortar, waterproof layer, and waterproof protective layer are sequentially arranged on top of the pad layer to form the waterproof structure for the end of the anti-buoyancy anchor.

[0006] A groove is set at the root of the anti-buoyancy anchor rod extending out of the pad layer. An expansion rubber waterstop strip is installed in the groove and filled with polysulfide caulking compound.

[0007] The width of the polymer cement waterproof mortar applied to the upper part of the groove shall not be less than 500mm.

[0008] The construction method for waterproofing the ends of anti-buoyancy anchors includes the following steps:

[0009] Step 1: Position the anti-buoyancy anchor by measuring and setting out, then drill a hole to the design depth and bury the anti-buoyancy anchor. Fix the anti-buoyancy anchor in the hole with limiting short bars and then grout it.

[0010] Step 2: After the depth and elevation of the anti-buoyancy anchor meet the design requirements, pour the concrete cushion layer; clean the junction between the anti-buoyancy anchor and the cushion layer.

[0011] Step 3: After chiseling out a groove along the base of the reinforcing bar, clean it again, apply cement-based penetrating crystalline waterproof coating, and then cure it.

[0012] Step 4: After curing, fill the groove with an expansion rubber waterstop strip, and then fill it with polysulfide caulking compound.

[0013] Step 5: After filling, smooth and even out the surface with polymer cement mortar;

[0014] Step 6: Lay the waterproof membrane on the base plate in detail and on the main surface, and pour the waterproof protective layer according to the design requirements.

[0015] In step 2, cleaning the junction between the anti-buoyancy anchor and the cushion layer specifically involves rinsing the concrete, dust, and debris with clean water. The base surface should be damp, but there should be no standing water.

[0016] In step 3, apply the cement-based penetrating crystalline waterproof coating in two coats. The coating should be applied continuously and evenly. After the second coat is semi-dry, start water curing. The curing time should be no less than three days.

[0017] In step 4, after the intumescent rubber waterstop strip is tightly, continuously, and firmly filled into the groove, polysulfide caulking compound is used to fill it.

[0018] The dimensions of the groove are not less than 8×8mm.

[0019] In step 5, the width of the polymer cement mortar application should not be less than 500mm.

[0020] Application of the waterproof structure at the end of the anti-buoyancy anchor bolt: the structure is applicable to any scenario requiring waterproofing of the anchor bolt.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Strengthening the waterproofing measures at the ends of the anti-buoyancy anchors solved the problem of water seepage at the ends of the anti-buoyancy anchors, thereby preventing large-scale water seepage in the basement floor.

[0023] 2. It has a significant effect on improving the problem of water seepage in basement floor slabs. It can be used as a standard construction method and can be promoted and applied in relevant fields, which has great promotional value. Attached Figure Description

[0024] Figure 1 This is a detailed drawing of the waterproof structure of the anti-buoyancy anchor end of the present invention.

[0025] Figure 2 This is a partially enlarged view of the waterproof structure at the end of the anti-buoyancy anchor bolt of the present invention.

[0026] Figure 3This is a partial enlarged view of the groove portion of the waterproof structure at the end of the anti-buoyancy anchor rod of the present invention.

[0027] The markings in the diagram are as follows: 1-Anti-buoyancy anchor; 2-Limiting steel bar; 3-Cement mortar; 4-Water-swellable rubber waterstop strip; 5-Polysulfide caulking compound; 6-Concrete pad; 7-Cement-based penetrating crystalline waterproof coating; 8-Polymer cement waterproof mortar; 9-Waterproof layer; 10-Protective layer; 11-Foundation slab. Detailed Implementation

[0028] The structure and working process of the present invention will be further described below with reference to the accompanying drawings.

[0029] The purpose of this solution is to provide a waterproof structure for the ends of anti-buoyancy anchors, which is formed by anti-buoyancy anchors, limiting steel bars, and a cushion layer. The structure is then applied sequentially with cement-based penetrating crystalline waterproof coating, water-swellable rubber strips, polysulfide caulking compound, polymer cement waterproof mortar, a waterproof layer, and a waterproof protective layer. This design aims to strengthen the waterproofing measures at the ends of the anti-buoyancy anchors.

[0030] A waterproof structure for the end of an anti-buoyancy anchor includes an anti-buoyancy anchor, a cement-based penetrating crystalline waterproof coating, a water-swellable rubber strip, polysulfide caulking compound, polymer cement waterproof mortar, a waterproof layer, and a waterproof protective layer. The structure is formed by the anti-buoyancy anchor, limiting steel bars, and a pad layer. The anti-buoyancy anchor is fixed in a pre-drilled hole and limited and fixed by the limiting steel bars. The hole is filled with cement mortar. The cement-based penetrating crystalline waterproof coating, polymer cement waterproof mortar, waterproof layer, and waterproof protective layer are sequentially arranged on top of the pad layer to form the waterproof structure for the end of the anti-buoyancy anchor.

[0031] Specific embodiments, such as Figures 1 to 3 As shown:

[0032] A waterproof structure for the end of an anti-buoyancy anchor rod includes an anti-buoyancy anchor rod 1, a cement-based penetrating crystalline waterproof coating 7, a water-swellable rubber strip 4, a polysulfide caulking compound 5, a polymer cement waterproof mortar 8, a waterproof layer 9, and a waterproof protective layer 10. The structure is formed by the anti-buoyancy anchor rod 1, the limiting steel bar 2, and the concrete pad 6. The anti-buoyancy anchor rod 1 is fixed in a pre-drilled hole and limited and fixed by the limiting steel bar 2. The hole is filled with cement mortar 3. The cement-based penetrating crystalline waterproof coating 7, the polymer cement waterproof mortar 8, the waterproof layer 9, and the waterproof protective layer 10 are sequentially arranged on top of the concrete pad 6 to form the waterproof structure for the end of the anti-buoyancy anchor rod.

[0033] The anti-buoyancy anchor rod 1 has a groove at the root of the bedding layer. An expansion rubber waterstop strip 4 is installed in the groove and filled with polysulfide caulking compound 5.

[0034] The width of the polymer cement waterproof mortar applied to the upper part of the groove shall not be less than 500mm.

[0035] The construction method for the waterproof structure at the end of the anti-buoyancy anchor includes the following steps:

[0036] Step 1: Locate the anti-buoyancy anchor rod by measuring and setting out. Then, drill a hole to the design depth using a drilling rig and embed the anti-buoyancy anchor rod. Fix the anti-buoyancy anchor rod in the hole with limiting short bars and then grout it. After ensuring that the depth and elevation of the anti-buoyancy anchor rod meet the design requirements, pour the concrete cushion layer.

[0037] Step 2: After the depth and elevation of the anti-buoyancy anchor meet the design requirements, pour the concrete pad layer; clean the junction between the anti-buoyancy anchor and the pad layer; remove concrete, dust, etc. from the junction between the anti-buoyancy anchor and the pad layer, rinse it clean with water, and the base surface should be moist but without standing water.

[0038] Step 3: After chiseling out a groove along the base of the reinforcing bar, clean it again, apply cement-based penetrating crystalline waterproof coating, and then cure it. Specifically, after chiseling out a 10×10mm groove along the base of the reinforcing bar, clean it again, and apply cement-based penetrating crystalline waterproof coating. The coating must be applied continuously and evenly. After the second layer of coating is semi-dry, start water curing. The curing time should not be less than three days.

[0039] Step 4: After curing, fill the groove with an expansion rubber waterstop strip, and then fill it with polysulfide caulking compound. Ensure that the waterstop strip is tightly, continuously and firmly filled into the groove, and then fill it with polysulfide caulking compound to ensure that the groove is tightly and compacted.

[0040] Step 5: After filling, smooth and evenly apply polymer cement mortar; the width of the cement mortar application should not be less than 500mm.

[0041] Step 6: Lay the waterproof membrane on the base plate in detail and on the main surface, and pour the waterproof protective layer according to the design requirements.

[0042] Furthermore, after chiseling a 10×10mm groove along the base of the reinforcing bar and cleaning it again, apply cement-based penetrating crystalline waterproof coating in two coats. The coating must be applied continuously and evenly. After the second coat is semi-dry, start water curing. The curing time should not be less than three days.

[0043] Finally, the waterproof membrane for the base plate is laid in detail and on the main surface, and the waterproof protective layer is poured according to the design requirements. After the construction is completed, the foundation base plate 11 is constructed on top of the waterproof protective layer.

[0044] The aforementioned waterproof structure for the ends of anti-buoyancy anchors can be extended to any scenario requiring anchor waterproofing.

[0045] This solution was tested and applied in a relocation and reconstruction project of a people's hospital and a resettlement area construction project in a certain city, both undertaken by China Twenty-Second Metallurgical Construction Group Co., Ltd., and achieved the expected results.

[0046] The foundation bearing layer of the No. 1 comprehensive building, the main construction project of the relocation and reconstruction project, is weathered rock containing abundant pore water. In order to achieve the anti-buoyancy effect, anti-buoyancy anchors are used in the design. In order to effectively solve the leakage problem of traditional anti-buoyancy anchor ends, this new type of composite anti-buoyancy anchor end waterproofing structure is applied, which significantly improves the waterproofing reliability and durability of the anti-buoyancy anchor ends, and provides a reference for the waterproofing of anti-buoyancy anchor ends in similar underground projects.

[0047] The foundation elevation of the resettlement area construction project is -6.2m, and the groundwater level is -2.00m (relative to ±0). There is pressurized water below. In order to achieve the anti-buoyancy effect, the design adopts anti-buoyancy anchor rods. At the same time, the waterproof structure at the end of the anti-buoyancy anchor rods is applied, and good waterproof effect is achieved.

[0048] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0049] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0050] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0051] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0052] It should be understood that this solution is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a manner common to the art. Any person skilled in the art can make many possible variations and modifications to this solution, or modify it into equivalent embodiments, without departing from the scope of this solution, using the methods and techniques disclosed above. This does not affect the substantive content of this solution. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this solution, without departing from its scope, still fall within the protection scope of this solution.

Claims

1. A waterproof structure for the end of an anti-buoyancy anchor bolt, characterized in that: It includes anti-buoyancy anchors, cement-based penetrating crystalline waterproof coating, water-swellable rubber strips, polysulfide caulking compound, polymer cement waterproof mortar, waterproof layer, and waterproof protective layer; the structure is formed by anti-buoyancy anchors, limiting steel bars, and a cushion layer. The anti-buoyancy anchors are fixed in pre-drilled holes and limited and fixed by limiting steel bars. The holes are filled with cement mortar. On the cushion layer, cement-based penetrating crystalline waterproof coating, polymer cement waterproof mortar, waterproof layer, and waterproof protective layer are sequentially installed to form the waterproof structure at the end of the anti-buoyancy anchor.

2. The waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 1, characterized in that: A groove is set at the root of the anti-buoyancy anchor rod extending out of the pad layer. An expansion rubber waterstop strip is installed in the groove and filled with polysulfide caulking compound.

3. The waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 2, characterized in that: The width of the polymer cement waterproof mortar applied to the upper part of the groove shall not be less than 500mm.

4. A construction method for a waterproof structure at the end of an anti-buoyancy anchor bolt, characterized in that: Includes the following steps: Step 1: Position the anti-buoyancy anchor by measuring and setting out, then drill a hole to the design depth and bury the anti-buoyancy anchor. Fix the anti-buoyancy anchor in the hole with limiting short bars and then grout it. Step 2: After the depth and elevation of the anti-buoyancy anchor meet the design requirements, pour the concrete cushion layer; clean the junction between the anti-buoyancy anchor and the cushion layer. Step 3: After chiseling out a groove along the base of the reinforcing bar, clean it again, apply cement-based penetrating crystalline waterproof coating, and then cure it. Step 4: After curing, fill the groove with an expansion rubber waterstop strip, and then fill it with polysulfide caulking compound. Step 5: After filling, smooth and even out the surface with polymer cement mortar; Step 6: Lay the waterproof membrane on the base plate in detail and on the main surface, and pour the waterproof protective layer according to the design requirements.

5. The construction method of the waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 4, characterized in that: In step 2, cleaning the junction between the anti-buoyancy anchor and the cushion layer specifically involves rinsing the concrete, dust, and debris with clean water. The base surface should be damp, but there should be no standing water.

6. The construction method of the waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 5, characterized in that: In step 3, apply the cement-based penetrating crystalline waterproof coating in two coats. The coating should be applied continuously and evenly. After the second coat is semi-dry, start water curing. The curing time should be no less than three days.

7. The construction method of the waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 4, characterized in that: In step 4, after the intumescent rubber waterstop strip is tightly, continuously, and firmly filled into the groove, polysulfide caulking compound is used to fill it.

8. The construction method of the waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 7, characterized in that: The dimensions of the groove are not less than 8×8mm.

9. The construction method of the waterproof structure at the end of the anti-buoyancy anchor bolt according to claim 4, characterized in that: In step 5, the width of the polymer cement mortar application should not be less than 500mm.

10. The application of a waterproof structure at the end of an anti-buoyancy anchor bolt, characterized by: The construction described in any of claims 1 to 3 may be applied to any scenario where waterproofing of the anchor bolt is required.

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