A device for reinforcing a concrete pole against typhoon and a construction method thereof

Abstract

The application discloses a kind of existing cement pole anti typhoon field reinforcement device and construction method, including prefabricated L-shaped plate (1) and ground anchor (2), it is characterized by: the bottom plate (10) end of prefabricated L-shaped plate (1) is provided with anchoring channel (3), and the end plate (11) of prefabricated L-shaped plate (1) is provided with bolt channel (4);The ground anchor (2) includes anchoring body (20) and anchor rod (21), anchoring body (20) is buried in rock layer or soil layer, and one end of anchor rod (21) passes through anchoring channel (3) and is connected at the end of prefabricated L-shaped plate (1) by bolt (22), and the other end of anchor rod (21) is poured in anchoring body (20);The prefabricated L-shaped plate (1) is enclosed in the periphery of electric pole (30), is connected by tensioning screw rod (40), and pours concrete (50) in the enclosed area.The application can significantly improve the anti typhoon capacity of existing electric pole under the premise of not increasing the occupancy of electric pole to periphery space, without affecting the surrounding traffic.

Description

Technical Field

[0001] This invention relates to the field of utility poles, and particularly to typhoon-resistant reinforcement of existing concrete utility poles. Background Technology

[0002] Concrete utility poles stand upright in the soil, resisting lateral forces, such as wind loads, through anchorage in the soil at their buried depth. To improve the pole's resistance to overturning, clamps are typically installed in the buried section. One-way clamps are perpendicular to the power line direction, or two clamps can be arranged orthogonally to form a two-way clamp. The clamps, perpendicular to the pole, can be considered as short, laterally extending limbs of the pole. These limbs, anchored in the backfill soil, provide an additional anti-overturning moment, thus enhancing the pole's resistance to overturning. Furthermore, adding guy wires to the above-ground portion of the pole can further enhance its resistance to overturning under strong wind loads.

[0003] However, many existing concrete power poles lack sufficient resistance to overturning under super typhoon conditions, resulting in significant damage as numerous poles collapse. Therefore, on-site reinforcement of existing concrete power poles to enhance their resistance to super typhoons has become an urgent need. However, simply adding guy wires to improve pole overturning resistance has significant limitations. Guy wires need to be installed above ground, significantly increasing the space occupied by the poles and severely impacting traffic. Furthermore, guy wires cannot be installed in confined or restricted spaces. Therefore, new technologies for enhancing the on-site overturning resistance of existing concrete power poles are urgently needed. Summary of the Invention

[0004] Technical problem to be solved: The purpose of this invention is to provide a typhoon-resistant anchoring device and construction method for existing cement poles, which can significantly improve the overturning resistance of existing cement poles and enhance the disaster resistance of lines under the action of super typhoons without increasing the land area and space occupied by existing cement poles.

[0005] Technical Solution: An existing cement pole typhoon-resistant on-site reinforcement device and construction method, comprising a precast L-shaped plate (1) and a ground anchor (2), characterized in that: an anchoring channel (3) is provided at the end of the bottom plate (10) of the precast L-shaped plate (1), and a bolt channel (4) is provided at the end plate (11) of the precast L-shaped plate (1); the ground anchor (2) comprises an anchor body (20) and an anchor rod (21), the anchor body (20) is buried in the rock or soil layer, one end of the anchor rod (21) passes through the anchoring channel (3) and is connected to the end of the precast L-shaped plate (1) by a bolt (22), and the other end of the anchor rod (21) is poured into the anchor body (20); the precast L-shaped plate (1) surrounds the perimeter of the pole (30), is connected by tie rods (40), and concrete (50) is poured in the surrounded area. The construction method of the existing cement pole typhoon-resistant on-site reinforcement device is as follows:

[0006] Step 1: Drill 4 grouting holes at the preset positions around the pole (30), then insert the anchor rod (21) into the grouting holes and pour mortar or concrete to form the anchor body (20).

[0007] Step 2: Excavate the soil around the bottom of the pole (30), with the excavation depth slightly greater than the thickness of the base plate (10) of the precast L-shaped plate (1), and surround the pole (30) with the four precast L-shaped plates (1), so that the ends of the anchor rods (21) pass through the anchoring holes (3) in the base plate (10).

[0008] Step 3: Insert the tie rod (40) through the bolt hole (4) in the end plate (11), tighten the bolt (41), assemble the four prefabricated L-shaped plates (1) together, and then pour concrete (50) in the enclosed area.

[0009] Step 4: After the anchor body (20) and the surrounding concrete (50) have reached the required strength, tighten the bolts (22) and apply pre-tension to the anchor rod (21);

[0010] Step 5: Backfill the soil layer, restore the ground surface around the pole (30), and complete the construction of the on-site reinforcement device.

[0011] The existing cement pole typhoon-resistant on-site reinforcement device and construction method are characterized in that: the precast L-shaped plate (1) is made of ultra-high performance concrete and the two ends of the end plate (11) are tongue and groove (12).

[0012] The existing cement pole typhoon-resistant on-site reinforcement device and construction method are characterized in that: the anchoring hole (3) at the end of the precast L-shaped plate (1) is projected on the ground at the outer side of the edge of the pole base plate (60).

[0013] The aforementioned on-site typhoon-resistant reinforcement device and construction method for existing cement poles is characterized by the following: the depth of the grouting hole is in the range of 4000mm~6000mm, and the diameter is in the range of 200mm~300mm.

[0014] The existing cement pole typhoon-resistant on-site reinforcement device and construction method are characterized in that: the anchor rod (21) is a steel bar, steel pipe, steel screw or fiber composite bar with a diameter of 20mm~30mm and a thread at one end with a thread length of 200mm. Attached Figure Description

[0015] Figure 1 This is a side elevation diagram of an existing cement pole reinforcement device for typhoon resistance.

[0016] Figure 2 This is a schematic diagram of a precast L-shaped slab with an existing on-site typhoon-resistant reinforcement device for cement power poles.

[0017] Figure 3 This is a top-down schematic diagram of the existing cement pole reinforcement device for typhoon resistance.

[0018] Figure 4 This is a three-dimensional schematic diagram of an existing cement pole reinforcement device for typhoon resistance.

[0019] In the figure: (1) Precast L-shaped plate; (2) Ground anchor; (3) Anchorage hole; (4) Bolt hole; (10) Base plate of precast L-shaped plate; (11) End plate of precast L-shaped plate; (12) Tongue and groove of end plate; (20) Anchor body; (21) Anchor rod; (22) Bolt of anchor rod; (30) Pole; (40) Tie rod; (41) Bolt of tie rod; (50) Concrete of enclosed area; (60) Base plate of pole. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] Example:

[0022] Step 1: Drill 4 grouting holes at the preset positions around the pole (30). The holes are located on the outside of the pole base plate (60) and the center position corresponds to the center position of the anchoring hole (3). Then, insert the anchor rod (21) into the grouting hole and pour mortar or concrete to form the anchor body (20).

[0023] Step 2: Excavate the soil around the bottom of the pole (30), with the excavation depth slightly greater than the thickness of the base plate (10) of the precast L-shaped plate (1), and surround the pole (30) with the four precast L-shaped plates (1), so that the ends of the anchor rods (21) pass through the anchoring holes (3) in the base plate (10).

[0024] Step 3: Insert the tie rod (40) through the bolt hole (4) in the end plate (11), tighten the bolt (41), assemble the four prefabricated L-shaped plates (1) together, and then pour concrete (50) in the enclosed area.

[0025] Step 4: After the anchor body (20) and the surrounding concrete (50) have reached the required strength, tighten the bolts (22) and apply pre-tension to the anchor rod (21);

[0026] Step 5: Backfill the topsoil, restore the ground surface around the pole (30), and complete the construction of the on-site reinforcement device.

Claims

1. A typhoon-resistant on-site reinforcement device and construction method for existing cement poles, comprising a precast L-shaped slab (1) and a ground anchor (2), characterized in that: Anchorage channels (3) are provided at the end of the bottom plate (10) of the precast L-shaped plate (1), and bolt channels (4) are provided at the end plate (11) of the precast L-shaped plate (1); the ground anchor (2) includes an anchor body (20) and an anchor rod (21). The anchor body (20) is buried in the rock or soil layer. One end of the anchor rod (21) passes through the anchorage channel (3) and is connected to the end of the precast L-shaped plate (1) by a bolt (22). The other end of the anchor rod (21) is poured into the anchor body (20); the precast L-shaped plate (1) surrounds the perimeter of the pole (30) and is connected by tie rods (40). Concrete (50) is poured in the enclosed area. The construction method of the existing cement pole anti-typhoon on-site reinforcement device is as follows: Step 1: Drill 4 grouting holes at the preset positions around the pole (30), then insert the anchor rod (21) into the grouting holes and pour mortar or concrete to form the anchor body (20). Step 2: Excavate the soil around the bottom of the pole (30), with the excavation depth slightly greater than the thickness of the base plate (10) of the precast L-shaped plate (1), and surround the pole (30) with the four precast L-shaped plates (1), so that the ends of the anchor rods (21) pass through the anchoring holes (3) in the base plate (10). Step 3: Insert the tie rod (40) through the bolt hole (4) in the end plate (11), tighten the bolt (41), assemble the four prefabricated L-shaped plates (1) together, and then pour concrete (50) in the enclosed area. Step 4: After the anchor body (20) and the surrounding concrete (50) have reached the required strength, tighten the bolts (22) and apply pre-tension to the anchor rod (21); Step 5: Backfill the topsoil, restore the ground surface around the pole (30), and complete the construction of the on-site reinforcement device.

2. The typhoon-resistant on-site reinforcement device and construction method for existing cement poles according to claim 1, characterized in that: The precast L-shaped slab (1) is made of ultra-high performance concrete and the two ends of the end plate (11) are tongue and groove joints (12).

3. The typhoon-resistant on-site reinforcement device and construction method for existing cement poles according to claim 1, characterized in that: The anchoring hole (3) at the end of the precast L-shaped plate (1) is located on the outside of the edge of the pole base plate (60) when projected onto the ground.

4. The typhoon-resistant on-site reinforcement device and construction method for existing cement poles according to claim 1, characterized in that: The depth of the grouting holes ranges from 4000mm to 6000mm, and the diameter ranges from 200mm to 300mm.

5. The typhoon-resistant on-site reinforcement device and construction method for existing cement poles according to claim 1, characterized in that: Anchor rod (21) is made of steel bar, steel pipe, steel screw or fiber composite bar, with a diameter of 20mm~30mm and threaded at one end with a thread length of 200mm.

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