Anti-floating anchor rod connecting structure under high-water-level sand layer geological condition and construction method

Abstract

The invention discloses an anti-floating anchor rod connecting structure under high-water-level sand layer geological conditions and a construction method, the anti-floating anchor rod connecting structure comprises an anti-floating anchor rod positioning device, anti-floating anchor rod reinforcing steel bars, filling layers and drill rods, a plurality of drill rods are vertically connected, the filling layers are arranged at the joints of two adjacent drill rods, the anti-floating anchor rod reinforcing steel bars are connected with the anti-floating anchor rod positioning device, and the anti-floating anchor rod positioning device is connected with the anti-floating anchor rod reinforcing steel bars. The anti-floating anchor positioning device is attached to the inner wall of the drill rod, and the free end of the upper portion of an anti-floating anchor steel bar is bent by 135 degrees and connected with a raft steel bar. Construction is simple, it is guaranteed that the anti-floating anchor rod reinforcing steel bar fixing position is accurate, and the method can adapt to positioning construction of anti-floating anchor rods of various sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of anti - floating anchor rod construction, and more specifically, to an anti - floating anchor rod connection structure and construction method under the geological condition of high - water - level sand layer. Background Technique

[0002] During the construction of existing projects, anti - floating anchor rods can connect the foundation of structures or buildings with the weathered rock layer in the foundation, and work together as part of the foundation or the upper structure; in this way, the foundation can effectively resist the upward buoyancy of groundwater.

[0003] Generally, the top steel bars of anti - floating anchor rods directly extend into the underground structure for connection, and there is little targeted waterproof and anti - corrosion treatment, resulting in the corrosion of the steel bars of anti - floating anchor rods; when there is groundwater with a high water level, the connection of anti - floating anchor rods is often damaged, and due to the fluidity of the sand layer, soil deformation or other factors, the anti - floating capacity decreases. Because the groundwater level is high in the sand - layer geology, and there are high salts or acidic substances in the groundwater, these will accelerate the corrosion of the steel bars of anti - floating anchor rods and cause the loss of anti - floating capacity. Summary of the Invention

[0004] The purpose of the present invention is: to solve the problems raised in the above - mentioned background technique, the present invention provides an anti - floating anchor rod connection structure and construction method under the geological condition of high - water - level sand layer.

[0005] The present invention adopts the following technical solutions:

[0006] The anti - floating anchor rod connection structure under the geological condition of high - water - level sand layer includes an anti - floating anchor rod positioning device, anti - floating anchor rod steel bars, a filling layer and drill pipes. A plurality of drill pipes are vertically connected, and a filling layer is provided at the connection of two adjacent drill pipes. The anti - floating anchor rod steel bars are connected with the anti - floating anchor rod positioning device, the anti - floating anchor rod positioning device fits with the inner wall of the drill pipe, and the upper free end of the anti - floating anchor rod steel bars is bent at 135° and connected with the steel bars of the raft.

[0007] In an embodiment of the present invention, the anti - floating anchor rod positioning device is formed by welding 12 plain round ribbed steel bars of model C8.

[0008] In an embodiment of the present invention, the anti - floating anchor rod steel bars are plain round ribbed steel bars of model C25.

[0009] In an embodiment of the present invention, the anchoring section of the anti - floating anchor rod steel bars is coated with epoxy resin to form an anchoring section epoxy resin coating.

[0010] In an embodiment of the present invention, the anti - floating anchor rod positioning devices are arranged at intervals of 1500 mm along the vertical length direction of the anti - floating anchor rod steel bars.

[0011] In an embodiment of the present invention, 12 anti-floating anchor rod positioning devices form a frame structure, and the anti-floating anchor rod steel bars are welded to the inner side of the frame structure.

[0012] An embodiment of the present invention also discloses a construction method for an anti-floating anchor rod connection structure, including the following steps:

[0013] Step 1: Determine the specifications, models, and lengths of the anti-floating anchor rod steel bars, drill pipes, and waterproof coiled materials

[0014] Check the specifications and models of the anti-floating anchor rod steel bars, drill pipes, and waterproof coiled materials on site;

[0015] Step 2: Drill pipe connection and filling

[0016] According to the design requirements, use an anchor rod drilling rig to drill holes. When the length of the drill pipe to be placed is reached, first connect multiple drill pipes together, and fill the connection of the drill pipes with anti-corrosion grease to form a filling layer;

[0017] Step 3: Lower the anti-floating anchor rod steel bars

[0018] When the drilling is completed, coat the anchoring section of the anti-floating anchor rod steel bars with epoxy resin to form an epoxy resin coating on the anchoring section, then weld it to the anti-floating anchor rod positioning device and lower it. The anti-floating anchor rod positioning device fits against the inner wall of the drill pipe;

[0019] Step 4: Pour the cushion layer and construct the waterproof coiled material

[0020] When the anti-floating anchor rod is grouted and fixed, pour the cushion layer, set a 3-mm modified asphalt waterproof coiled material on the cushion layer, and then pour the waterproof protective layer;

[0021] Step 5: Construct the anti-corrosion waterproof layer for the anti-floating anchor rod steel bars

[0022] Apply the anti-corrosion waterproof layer at the connection between the waterproof protective layer and the anti-floating anchor rod steel bars. Finally, bend the free end of the upper part of the anti-floating anchor rod steel bars into a 135° angle, and connect the free end of the upper part of the anti-floating anchor rod steel bars to the steel bars of the raft slab;

[0023] Step 6: Pull-out test

[0024] After all the anti-floating anchor rod steel bars are consolidated and reach the design strength requirements, conduct a pull-out test.

[0025] In an embodiment of the present invention, the anti-corrosion waterproof layer is a cement-based penetrating crystalline waterproof coating.

[0026] In an embodiment of the present invention, the thickness of the cushion layer is 100 mm.

[0027] Beneficial effects

[0028] This construction method is simple in construction. The connection structure and positioning device are simple to fabricate, and the materials can be sourced locally. The device can be made using waste steel bars.

[0029] The connection structure is convenient for transfer and has strong versatility, capable of adapting to the positioning construction of anti-floating anchor rods of various sizes.

[0030] When using the present invention, it will not cause harm to the hands of operators.

[0031] It can significantly improve the operation efficiency, and the tool can be reused. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the anti-floating anchor rod connection structure according to an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the construction according to an embodiment of the present invention. Detailed Embodiment

[0034] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] An anti-floating anchor rod connection structure under high water level sand layer geological conditions provided by the present invention includes an anti-floating anchor rod positioning device 2, anti-floating anchor rod steel bars 4, drill pipes 10 and a filling layer 9. A plurality of drill pipes 10 are vertically connected, and a filling layer 9 is provided at the connection of two adjacent drill pipes 10. The anti-floating anchor rod steel bars 4 are connected to the anti-floating anchor rod positioning device 2, and the anti-floating anchor rod positioning device 2 is attached to the inner wall of the drill pipe 10. The upper free end of the anti-floating anchor rod steel bar 4 is bent at 135° and connected to the steel bars of the raft 1 together.

[0036] The laying method of the anti-floating anchor rod positioning device 2 is to arrange it at intervals of 1500 mm in the vertical length direction of the floating anchor rod steel bars, number them in sequence as N1, N2, N3...

[0037] In an embodiment of the present invention, the anti-floating anchor rod positioning device 2 is formed by welding 12 round ribbed steel bars of model C8.

[0038] In an embodiment of the present invention, the anti-floating anchor rod steel bar 4 is a round ribbed steel bar of model C25.

[0039] In an embodiment of the present invention, the anchoring section of the anti-floating anchor rod steel bar 4 is coated with epoxy resin to form an anchoring section epoxy resin coating 6.

[0040] In an embodiment of the present invention, the anti-floating anchor rod positioning device 2 is arranged at intervals of 1500 mm in the vertical length direction of the anti-floating anchor rod steel bar 4.

[0041] In an embodiment of the present invention, twelve anti-floating anchor rod positioning devices 2 form a frame structure, and the anti-floating anchor rod steel bars 4 are welded to the inner side of the frame structure.

[0042] An embodiment of the present invention also discloses a construction method for an anti-floating anchor rod connection structure, including the following steps:

[0043] Step 1: Determine the specifications, models, and lengths of the anti-floating anchor rod steel bars 4, drill pipes 10, and waterproof coiled materials 8

[0044] Inspect the specifications and models of the on-site anti-floating anchor rod steel bars 4, drill pipes 10, and waterproof coiled materials 8;

[0045] Step 2: Connect and fill the drill pipes 10

[0046] According to the design requirements, use an anchor rod drilling rig to drill holes. When the length of the drill pipe to be placed is reached, first connect multiple drill pipes together, and fill the connection part of the drill pipes with anti-corrosion grease to form a filling layer 9; the drill pipe 10 here is an alloy seamless steel pipe. The drill pipes 10 are connected by threads. In this way, the filling layer 9 realizes anti-corrosion and waterproofing.

[0047] Step 3: Lower the anti-floating anchor rod steel bars

[0048] When the drilling is completed, coat the anchoring section of the anti-floating anchor rod steel bars with epoxy resin to form an epoxy resin coating 6 on the anchoring section, and then weld it to the anti-floating anchor rod positioning device and lower it. The anti-floating anchor rod positioning device fits against the inner wall of the drill pipe; due to the setting of the anti-floating anchor rod positioning device, it prevents the anti-floating anchor rod steel bars 4 from moving during pouring and ensures the accurate fixed position of the anti-floating anchor rod steel bars.

[0049] Step 4: Pour the cushion layer and construct the waterproof coiled material

[0050] When the anti-floating anchor rod is grouted and fixed, pour the cushion layer 3, set a 3-mm modified asphalt waterproof coiled material 5 on the cushion layer 3, and then pour the waterproof protective layer 7; the waterproof protective layer 7 here uses 5-mm C20 concrete. The cushion layer is formed by pouring C20 concrete.

[0051] Step 5: Construct the anti-corrosion waterproof layer 5 for the anti-floating anchor rod steel bars

[0052] Apply an anti-corrosion waterproof layer at the connection between the waterproof protective layer and the anti-floating anchor rod steel bars. Finally, bend the free end of the upper part of the anti-floating anchor rod steel bars into a 135° angle, and connect the free end of the upper part of the anti-floating anchor rod steel bars to the steel bars of the raft slab 1; the raft slab 1 is formed by pouring C35P8 concrete.

[0053] Step 6: Anti-pulling test

[0054] After all the anti-floating anchor rod steel bars are consolidated and reach the design strength requirements, conduct a pull-out test.

[0055] In an embodiment of the present invention, the anti-corrosion waterproof layer is a cement-based permeable crystalline waterproof coating.

[0056] In an embodiment of the present invention, the thickness of the cushion layer is 100 mm.

[0057] The present invention realizes the correct construction of anti-floating anchor rod steel bars under the geological conditions of high water level sand layer.

[0058] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Anti-floating anchor rod connection structure under high water level sand layer geological conditions, characterized by: It includes an anti-floating anchor positioning device, anti-floating anchor steel bars, a filling layer and a drill rod. Multiple drill rods are vertically connected. A filling layer is provided at the connection between two adjacent drill rods. The anti-floating anchor steel bars are connected to the anti-floating anchor positioning device. The anti-floating anchor positioning device is fitted with the inner wall of the drill rod. The upper free end of the anti-floating anchor steel bars is bent into 135 degrees and connected to the steel bars of the raft.

2. The anti-floating anchor rod connection structure under high water level sand layer geological conditions according to claim 1, characterized in that; The anti-floating anchor rod positioning device is formed by welding 12 C8 smooth round ribbed steel bars.

3. The anti-floating anchor rod connection structure under high water level sand layer geological conditions according to claim 1, characterized in that: The anti-floating anchor reinforcement is a C25 plain round ribbed reinforcement.

4. The anti-floating anchor rod connection structure under high water level sand layer geological conditions according to claim 1, characterized in that: The anchoring section of the anti-floating anchor reinforcement is partially coated with epoxy resin to form an anchoring section epoxy resin coating.

5. The anti-floating anchor rod connection structure under high water level sand layer geological conditions according to claim 1, characterized in that: The anti-floating anchor rod positioning devices are arranged at intervals of 1500mm along the vertical length direction of the anti-floating anchor rod reinforcement.

6. The anti-floating anchor rod connection structure under high water level sand layer geological conditions according to claim 2, characterized in that: The frame structure is composed of 12 anti-floating anchor rod positioning devices, and the anti-floating anchor rod steel bars are welded to the inner side of the frame structure.

7. The construction method of the anti-floating anchor rod connection structure is characterized by: The following steps are involved: Step 1: Determine the specifications and lengths of anti-floating anchor bars, drill rods, and waterproofing membranes Check the specifications and models of on-site anti-floating anchor steel bars, drill rods, and waterproofing membranes; Step 2: Drill pipe connection and filling Use an anchor drill to drill holes according to design requirements. When the drill rod length is reached, connect multiple drill rods together first, and fill the drill rod joints with anti-corrosion grease to form a filling layer; Step 3: Anchoring the anti-floating anchor bar When the drilling is completed, the anchoring section of the anti-floating anchor rod reinforcement is coated with epoxy resin to form an anchoring section epoxy resin coating, and then it is welded to the anti-floating anchor rod positioning device and then anchored, and the anti-floating anchor rod positioning device is fitted with the inner wall of the drill rod; Step 4: Pouring cushion layer and waterproof membrane construction After the anti-floating anchor is fixed by grouting, the cushion layer is poured, and a 3mm modified asphalt waterproof membrane is set on the cushion layer, and then the waterproof protective layer is poured; Step 5: Construction of anti-floating anchor reinforcement anti-corrosion and waterproof layer Apply an anti-corrosion and waterproof layer at the connection between the waterproof protective layer and the anti-floating anchor reinforcement, and finally bend the free end of the upper part of the anti-floating anchor reinforcement into 135 degrees, and connect the free end of the upper part of the anti-floating anchor reinforcement with the reinforcement of the raft; Step 6: Pull-out test After all the anti-floating anchor reinforcements are consolidated and reach the design strength requirements, a pull-out test is carried out.

8. The construction method of the anti-floating anchor rod connection structure according to claim 7, characterized in that: The anti-corrosion and waterproof layer is a cement-based penetrating crystalline waterproof coating.

9. The U-shaped glass fixing and sealing method according to claim 1, characterized in that: The thickness of the cushion layer is 100mm.

Images