Waterproof construction method for basement anti-floating anchor rod

Abstract

The invention discloses a waterproof construction method for a basement anti-floating anchor rod. The waterproof construction method comprises the steps that an anchor rod hole is formed; an anchor rod bundle structure is manufactured and formed, and the anchor rod bundle structure comprises a plurality of positioning circular rings and at least three anchor rod steel bars; the anchor rod bundle structure is integrally hoisted and placed into an anchor rod hole, and grouting is conducted; constructing a bottom plate cushion layer, and paving a waterproof layer; a waterproof rubber lantern ring is arranged on the outer side of the anchor rod bundle structure in a sleeving mode, the waterproof rubber lantern ring is arranged at the top of a waterproof layer, then asphalt waterproof factice is poured into the waterproof rubber lantern ring, and then an annular water swelling sealing strip is installed on each anchor rod steel bar; and after the anchor rod steel bars are bent, bottom plate steel bar binding, bottom plate formwork installation and bottom plate concrete pouring are conducted. The device can effectively prevent the water leakage problem at the basement anchor rod, and has the advantages of simple structure, low construction cost and simplicity and convenience in construction.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a waterproof construction method for anti-buoyancy anchor rods in basements. Background Technology

[0002] With the rapid development of cities, construction projects play a vital role in the urbanization process. However, the foundation is a crucial component of building construction. In complex foundations, especially those with abundant groundwater and high buoyancy, measures are often needed to prevent the basement foundation from floating. Anti-buoyancy anchors are a common method used in this regard. However, while anti-buoyancy anchors prevent basement floating, water leakage at the anchor points is also a frequent problem. Numerous cases of basement leaks are caused by improper waterproofing design or construction at the anti-buoyancy anchor points. Therefore, the key to this invention is to develop a simple, easy-to-construct, flexible, and low-cost basement anti-buoyancy anchor waterproofing construction method that ensures waterproofing quality without increasing project costs.

[0003] Currently, there are publicly available patents related to waterproofing methods using anti-buoyancy anchors. For example, utility model application number 201921374892.6 discloses an anti-buoyancy anchor waterproofing structure and building structure. The anti-buoyancy anchor is embedded in a concrete layer. The anti-buoyancy anchor waterproofing structure includes: an anchor; a waterproof coating layer placed on the concrete layer; a self-adhesive waterproof membrane layer placed on the waterproof coating layer, the self-adhesive waterproof membrane wrapping around the root of the anchor to form a filling cavity defined by the upper surface of the waterproof coating layer, the outer surface of the anchor, and the inner wall of the wrapped self-adhesive waterproof membrane; and a non-curing waterproof material filler, wherein the non-curing waterproof material is a non-curing rubber asphalt waterproof material. This utility model, by placing a non-curing rubber asphalt waterproof material in the filling cavity, avoids the problem of insufficient waterproof material filling in the narrow space between the anchors, thereby improving the waterproofing effect of the anti-buoyancy anchor waterproofing structure.

[0004] Patent application number CN202320889333.9 discloses an anti-buoyancy anchor waterproof structure. This utility model relates to the field of building waterproofing technology, and in particular to an anti-buoyancy anchor waterproof structure. This anti-buoyancy anchor waterproof structure includes a galvanized water-stop steel pipe, a water-swellable water-stop strip, and a water-stop seal. The bottom of the galvanized water-stop steel pipe is located at the bottom of a circular recess; the water-swellable water-stop strip is circumferentially adhered to the bottom end of the galvanized water-stop steel pipe; the water-stop seal is disposed within the circular recess and located outside the galvanized water-stop steel pipe. This anti-buoyancy anchor waterproof structure can prevent groundwater from seeping upwards.

[0005] Patent application number CN201720713304.1 discloses a waterproof joint for anti-buoyancy anchor rods. This utility model discloses a waterproof joint for anti-buoyancy anchor rods, comprising a reinforced concrete base slab and an anti-buoyancy anchor rod. The main reinforcing bars of the anti-buoyancy anchor rod extend into the reinforced concrete base slab. A funnel-shaped groove is provided at the junction of the reinforced concrete base slab and the anti-buoyancy anchor rod. In addition to a waterproof layer below the reinforced concrete base slab, the groove also includes, from top to bottom, a waterproof mortar layer, a waterproof sealant filling layer, a waterproof reinforcement layer for the anchor rod head, and a mortar leveling layer. This utility model's waterproof joint for anti-buoyancy anchor rods adds a funnel-shaped groove at the top of the anti-buoyancy anchor rod. After the waterproof membrane is applied, a certain height of waterproof sealant is first filled, followed by waterproof mortar filling and leveling. This avoids the exposure of cracks in the anti-buoyancy anchor rod reinforcing bars at the hinge joint of the base slab, while ensuring that the waterproof layer under the base slab can form an effective whole, resulting in good waterproofing performance.

[0006] The aforementioned patents all suffer from complex structures and limited flexibility in application, and are significantly different from the basement anti-buoyancy anchor waterproofing construction method provided in this application.

[0007] Invention content

[0008] Due to the aforementioned deficiencies in existing technologies, this invention provides a method for waterproofing basements using anti-buoyancy anchors.

[0009] Specifically, the present invention provides a waterproof construction method for anti-buoyancy anchor rods in basements, comprising the following steps:

[0010] An anchor bolt holes are formed by drilling with a spiral drilling machine;

[0011] An anchor bolt bundle structure is formed, comprising several positioning rings and at least three anchor bolts. The at least three anchor bolts are fixed into a whole by multiple positioning rings arranged vertically. The at least three anchor bolts are evenly fixed on the inner rings of the positioning rings. At least three protective layer pads are evenly arranged on the outer rings of each positioning ring. The outer sides of the at least three protective layer pads are circular, and the diameter of the outer circle of the at least three protective layer pads is adapted to the inner diameter of the anchor bolt hole.

[0012] The entire anchor bolt bundle structure is hoisted into the anchor bolt hole, and grout is injected into the anchor bolt hole.

[0013] Construct the base slab cushion layer and lay a waterproof layer on the base slab cushion layer;

[0014] A waterproof rubber collar is fitted onto the outside of the anchor bolt bundle structure, and the waterproof rubber collar is set on the top of the waterproof layer. Then, asphalt waterproof sealant is injected into the waterproof rubber collar, and then a ring-shaped water-swellable sealing strip is installed on each anchor bolt reinforcement.

[0015] After bending the anchor bars, the bottom slab reinforcement is tied, the bottom slab formwork is installed, and the bottom slab concrete is poured.

[0016] In some of these embodiments, the distance between two adjacent positioning rings is 1.5 to 2.5 m.

[0017] In some embodiments, the positioning ring and the reinforcing bar are connected by welding.

[0018] In some embodiments, the positioning ring is made of steel bars.

[0019] In some of these embodiments, the base slab cushion layer is formed by casting C20 concrete.

[0020] In some embodiments, the waterproof layer is a pre-laid reverse-adhesive waterproof membrane, and the step of laying the waterproof layer on the base slab includes:

[0021] First, the waterproof membrane is pre-laid on the base layer according to the marked laying lines. Then, the waterproof membrane is peeled off and a primer and waterproof coating are applied to the base layer. Finally, the formal laying is carried out.

[0022] In some embodiments, the distance between the annular water-swellable sealing strip and the waterproof layer is 110–130 mm.

[0023] Compared with the prior art, the above-mentioned invention has the following advantages or beneficial effects:

[0024] (1) The present invention has a simple structure, a simple construction method, and a low project cost.

[0025] (2) This invention is convenient to use, efficient, safe and easy to operate.

[0026] (3) The structure of the present invention is easy for on-site workers to understand, easy to operate, and the quality is guaranteed. Attached Figure Description

[0027] The present invention, its features and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; the focus is on illustrating the gist of the invention.

[0028] Figure 1 This is a schematic diagram of the waterproofing construction of anti-buoyancy anchors in the basement according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional schematic diagram of the anchor hole and anchor in an embodiment of the present invention;

[0030] Among them, 1. Anchor bolt hole; 2. Hole wall; 3. Anchor bolt; 4. Protective layer pad; 5. Base plate pad;

[0031] 6. Waterproof layer; 7. Waterproof rubber collar; 8. Asphalt waterproof sealant; 9. Annular water-swellable sealing strip; 10. Bottom slab reinforcement; 11. Bottom slab concrete; 12. Positioning ring; 13. Grouting pipe. Detailed Implementation

[0032] The structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments, but...

[0033] This is not intended to limit the scope of the invention.

[0034] The structural materials involved in the following examples and embodiments, such as steel bars, waterproof membranes, rubber, asphalt sealant, water-swellable sealing strips, and concrete, are all common materials sold on the market.

[0035] See Figure 1 and Figure 2 As shown in the figure, this embodiment provides a waterproof construction method for anti-buoyancy anchor rods in basements. Specifically, the construction method includes the following steps:

[0036] Step S1: Use a spiral drilling machine to drill and form the anchor bolt hole 1. After forming, ensure that the hole wall 2 does not collapse during the anchor bolt installation and grouting process in the anchor bolt hole 1.

[0037] Specifically, after determining the anchor bolt hole location, a spiral drilling machine is used. The spiral drilling machine is leveled, erected, and stabilized. Control marks are made on the frame or pipe. The drilling is performed to align with the pile position, ensuring even drilling to avoid forming spiral holes. The hole depth should be clearly marked on the drilling rig, with a depth error not exceeding 0.1m. The anchor bolt hole diameter is 200mm. The mechanically drilled hole depth should be approximately 0.2m deeper than the designed hole depth. After reaching the bottom, the hole is preliminarily flushed using the drilling rig's airflow for about 3 minutes to minimize debris. When drilling in rock formations, a special diamond drill bit is used, and the verticality deviation of the anchor bolt hole should not exceed 5%. After the anchor bolt hole is drilled, the well-washing pipe connected to the air compressor is inserted into the hole, and the hole is repeatedly flushed from top to bottom and then from bottom to top until the sediment is less than or equal to 30cm. The hole opening is properly maintained to prevent debris from flowing into the hole.

[0038] Step S2: An anchor bolt bundle structure is formed, which includes several positioning rings 12 and three anchor bolt steel bars 3. The three anchor bolt steel bars 3 are fixed into a whole by multiple positioning rings 12 arranged vertically. The at least three anchor bolt steel bars 3 are evenly fixed on the inner ring of the positioning rings 12. At least three protective layer pads 4 are evenly arranged on the outer ring of each positioning ring 12. The outer sides of the at least three protective layer pads 4 are concentric circles, and the diameter of the circle on the outer side of the at least three protective layer pads 4 is adapted to the inner diameter of the anchor bolt hole 1.

[0039] Specifically, the aforementioned anchor bolt bundle structure uses three 22mm diameter anchor bolt steel bars 3, which are processed and extended to meet the design length of the anchor bolt. The joints of the anchor bolt steel bars 3 are connected by straight threads, and the joints are Class I joints. Then, an epoxy coating is applied to the anchor bolt steel bars 3. Finally, the three anchor bolt steel bars 3 are fixed by positioning rings 12. The positioning rings 12 are 10cm diameter rings formed by bending 12mm diameter steel bars. The three anchor bolt steel bars 3 are evenly distributed on the inner ring of the positioning rings 12 by welding. The positioning rings 12 are set at 2m intervals on the anchor bolt steel bars 3 to ensure that the anchor bolt steel bars 3 do not fall apart when being lifted. Finally, three protective layer pads 4 are set at the position of each positioning ring 12 to ensure that the anchor bolt bundle structure is centered after entering the hole, and that the grouting material fully covers the anchor bolt bundle structure and that the thickness of the protective layer of the anchor bolt bundle structure meets the requirements.

[0040] Step S3: The entire anchor bolt bundle structure is hoisted into the anchor bolt hole 1, and grout is injected into the anchor bolt hole 1.

[0041] Specifically, after the anchor bolt bundle structure is formed, it is transported to the construction site by flatbed truck. The anchor bolt bundle structure is then hoisted into the anchor bolt hole 1 using the lifting equipment on the anchor bolt drilling machine. Grouting is then performed through the grouting pipe 13 pre-fixed on the anchor bolt bundle structure. The distance from the end of the grouting pipe 13 to the bottom of the hole should be 100mm. In order to ensure that the grouting is dense and full, a two-stage grouting method is adopted. The first grouting is performed to the top of the hole, and the second grouting is performed before the grout stops sinking and begins to set.

[0042] Step S4: Construct the base slab cushion layer 5 and lay the waterproof layer 6 on the base slab cushion layer 5.

[0043] Specifically, after the grouting of anchor bolt hole 1 is completed and the grout has reached its strength, the top of the anchor bolt is cleaned and removed. After the anchor bolt construction is completed and the grout strength meets the requirements, the anchor bolt is tested. After the test is passed, the concrete for the base slab cushion layer 5 is poured. That is, after the anchor bolt construction is completed and passed the test, a layer of C20 concrete is poured on the natural foundation. After the cushion layer concrete is poured, the waterproof layer 6 can only be laid after the cushion layer concrete strength meets the requirements and passes the test. The waterproof layer 6 uses pre-laid reverse-adhesive waterproof membrane. Before laying, the waterproof membrane laying line is marked on the base slab cushion layer 5. Then, the waterproof membrane is laid in advance, and after laying, it is peeled off. A primer and waterproof coating are applied to the base slab cushion layer 5. Finally, the waterproof membrane is laid on top.

[0044] Step S5: The waterproof rubber collar 7 is fitted onto the outside of the anchor bolt bundle structure, and the waterproof rubber collar 7 is set on the top of the waterproof layer 6. Then, the asphalt waterproof sealant 8 is poured into the waterproof rubber collar 7. After that, an annular water-swellable sealing strip 9 is installed on each anchor bolt steel bar 3.

[0045] Specifically, after the waterproof membrane is laid, there is a gap in the middle of the anchor bolt bundle structure, meaning the membrane cannot be laid in the middle of the anchor bolt bundle structure. To ensure that the groundwater in this gap area rises, the waterproof rubber collar 7 is installed from the top of the anchor bolt bundle structure downwards. After molding, the waterproof rubber collar 7 is located on top of the waterproof membrane. Then, asphalt waterproof sealant 8 is poured into the waterproof rubber collar 7 and filled to ensure that the waterproof layer 6 is tightly grouted at the contact points with the anchor bolt bundle structure, the rubber collar, and the areas not reached by the waterproof layer 6. The waterproof membrane and the waterproof rubber collar 7 form a sealed waterproof system. Finally, an annular water-swellable sealing strip 9 is installed at the position of each of the three anchor bolts 3 of the anchor bolt bundle structure, 120mm away from the top of the waterproof membrane.

[0046] Step S6: After bending each anchor bar 3, the bottom plate reinforcement 10 is tied, the bottom plate formwork is installed, and the bottom plate concrete 11 is poured.

[0047] Specifically, after the anchor waterproofing system is completed and passes inspection, the bottom slab reinforcement 10 is tied, the bottom slab formwork is installed, and the bottom slab concrete 11 is poured. Therefore, the basement anti-buoyancy anchor waterproofing construction method provided in this invention has a simple and easy-to-understand structure, a simple construction method, and a lower project cost; it is convenient, efficient, and safe, with strong operability; it is easy for on-site workers to understand, convenient to operate, and the quality is guaranteed.

[0048] In summary, this invention provides a waterproofing construction method for anti-buoyancy anchors in basements. This method, which waterproofs anti-buoyancy anchors, mainly includes: anchor holes (generally around 200mm), anchor hole walls, anchor bundle structure (three Ф22 steel bars), positioning rings (positioning rings formed by bending steel bars, spaced 2m apart), a base slab cushion layer (15cm thick C20 concrete), a waterproof layer (pre-laid reverse-adhesive waterproof membrane), a waterproof rubber collar, asphalt waterproof sealant, a ring-shaped water-swellable sealing strip, basement base slab reinforcement, and basement base slab concrete. A layer of pre-laid reverse-adhesive waterproof membrane is laid at the joint between the anchor reinforcement and the base slab cushion layer. Simultaneously, a waterproof rubber collar is fitted from the top of the anchor, ensuring a tight bond between the collar and the waterproof membrane. The collar is filled with asphalt waterproof sealant to ensure a seal between the collar and the area without waterproof membrane. Finally, a ring-shaped water-swellable sealing strip is installed on each anchor reinforcement. Even if groundwater rises along the reinforcement, it will be stopped at the water-swellable sealing strip.

[0049] The preferred embodiments of the present invention have been described above. It should be understood that the present invention 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 the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, still fall within the protection scope of the present invention.

Claims

1. A waterproof construction method for anti-buoyancy anchor rods in basements, characterized in that, Includes the following steps: An anchor bolt holes are formed by drilling with a spiral drilling machine; An anchor bolt bundle structure is formed, comprising several positioning rings and at least three anchor bolts. The at least three anchor bolts are fixed into a whole by multiple positioning rings arranged vertically. The at least three anchor bolts are evenly fixed on the inner rings of the positioning rings. At least three protective layer pads are evenly arranged on the outer rings of each positioning ring. The outer sides of the at least three protective layer pads are circular, and the diameter of the outer circle of the at least three protective layer pads is adapted to the inner diameter of the anchor bolt hole. The entire anchor bolt bundle structure is hoisted into the anchor bolt hole, and grout is injected into the anchor bolt hole. The foundation slab is constructed, and a waterproof layer is laid on the foundation slab. A waterproof rubber collar is fitted onto the outside of the anchor bolt bundle structure, and the waterproof rubber collar is set on the top of the waterproof layer. Then, asphalt waterproof sealant is injected into the waterproof rubber collar, and then a ring-shaped water-swellable sealing strip is installed on each anchor bolt reinforcement. After bending the anchor bars, the bottom slab reinforcement is tied, the bottom slab formwork is installed, and the bottom slab concrete is poured.

2. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The distance between two adjacent positioning rings is 1.5 to 2.5 m.

3. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The positioning ring and the reinforcing bar are connected by welding.

4. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The positioning ring is made of steel bars.

5. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The base slab cushion layer is formed by pouring C20 concrete.

6. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The waterproof layer is a pre-laid reverse-adhesive waterproof membrane, and the step of laying the waterproof layer on the base slab includes: First, the waterproof membrane is pre-laid on the base layer according to the marked laying lines. Then, the waterproof membrane is peeled off and a primer and waterproof coating are applied to the base layer. Finally, the formal laying is carried out.

7. The waterproofing construction method for basement anti-buoyancy anchors as described in claim 1, characterized in that, The distance between the annular water-swellable sealing strip and the waterproof layer is 110-130 mm.

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