Power transmission tower pile foundation sheath capable of resisting erosion of salinized soil and construction method

Abstract

The invention discloses a power transmission tower pile foundation sheath capable of resisting salinized soil erosion and a construction method, and relates to the technical field of power transmission tower structure engineering. Comprising a reinforced concrete pile foundation, a protective sleeve arranged on the periphery of the pile foundation in a sleeving mode, an anti-corrosion filler poured between the inner wall of the protective sleeve and the outer wall of the pile foundation and a pile cap arranged at the top of the pile foundation, and the pile cap covers outwards-extending anchor bars of the pile foundation. Corrosive media are directly prevented from making contact with the pile body, the chemical erosion risk is reduced, the corrosion-resistant filler poured between the protective sleeve and the pile foundation can neutralize permeating corrosive ions, the degradation rate of pile body steel bars and concrete is delayed, the anchor bars extending outwards are covered with the pile cap, the anchor bars are prevented from being directly exposed to the corrosive environment, and the service life of the anchor bars is prolonged. And reduction of anchoring force or structural cracking caused by corrosion is prevented, and all-directional protection of the pile foundation structure is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission tower structure engineering, and particularly relates to a transmission tower pile foundation sheath resistant to saline soil erosion and a construction method thereof. Background Art

[0002] As a soil in a special geological environment, saline soil, with its characteristics of high salt content, strong corrosiveness, and repeated dry-wet cycles, poses a serious threat to the durability of transmission tower pile foundations. Moreover, after the pile foundation is poured, it is necessary to statically place and cure the pile foundation. During this period, it is easy to cause corrosion of the exposed steel bars and concrete on the pile foundation.

[0003] Therefore, it is necessary to develop and design a transmission tower pile foundation sheath resistant to saline soil erosion and a construction method thereof, which can simultaneously achieve the resistance of concrete pile foundations and internal steel bars or anchor bars to saline soil erosion, and improve the service life of transmission tower pile foundations. This is an urgent technical problem that needs to be solved by those skilled in the art at present. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a transmission tower pile foundation sheath resistant to saline soil erosion and a construction method thereof, which can simultaneously achieve the resistance of concrete pile foundations and internal steel bars or anchor bars to saline soil erosion, and improve the service life of transmission tower pile foundations.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A transmission tower pile foundation sheath resistant to saline soil erosion includes a reinforced concrete pile foundation, a protective sleeve sleeved on the outer periphery of the pile foundation, an anti-corrosion filler poured between the inner wall of the protective sleeve and the outer wall of the pile foundation, and a pile cap arranged at the top of the pile foundation, and the pile cap covers the extended anchor bars of the pile foundation.

[0007] Preferably, angle steel tower legs for connecting with the transmission tower tower legs are arranged on the pile cap.

[0008] Preferably, bolts for connecting with the transmission tower tower legs are pre-embedded at the top of the pile foundation, and the tops of the bolts extend out of the pile cap.

[0009] Preferably, the protective sleeve includes an upper cylinder and a lower cone connected to the upper cylinder, and the inner diameter of the lower cone is equal to the outer diameter of the pile foundation.

[0010] Preferably, the material of the protective sleeve is GFRP.

[0011] Preferably, the anti-corrosion filler is a polyurea slurry.

[0012] Preferably, the distance between the outer wall of the pile foundation and the inner wall of the protective sleeve is 2 mm to 3 mm.

[0013] Preferably, the upper surface of the anti-corrosion filler is flush with the upper surface of the pile foundation.

[0014] The present invention also discloses a construction method for a transmission tower pile foundation sheath resistant to saline soil erosion, which is applied to the above-mentioned transmission tower pile foundation sheath resistant to saline soil erosion, and includes the following steps:

[0015] Embed anchor bars and additional steel bars;

[0016] Pour a concrete pile foundation and pour a pile cap on the top of the concrete pile foundation;

[0017] After the concrete pile foundation is poured, excavate the soil around the upper part of the pile foundation to form an installation groove for installing the protective sleeve;

[0018] Fill the anti-corrosion filler between the pile foundation and the protective sleeve until it is flush with the top surface of the pile foundation.

[0019] Preferably, after the anti-corrosion filler is filled, it is vibrated and compacted.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] By setting the protective sleeve as an outer barrier, it directly blocks the contact between the corrosive medium and the pile body, reducing the risk of chemical erosion. The anti-corrosion filler poured between the protective sleeve and the pile foundation can neutralize the infiltrated corrosive ions, delaying the deterioration rate of the pile body steel bars and concrete. By covering the extended anchor bars with the pile cap, the anchor bars are prevented from being directly exposed to the corrosive environment, preventing the reduction of the anchoring force or the cracking of the structure caused by corrosion, and realizing the all-round protection of the pile foundation structure. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Attached Figure 1 is a schematic top view structure diagram of a transmission tower pile foundation sheath resistant to saline soil erosion disclosed by the present invention;

[0024] Attached Figure 2 is a schematic front view structure diagram of a transmission tower pile foundation sheath resistant to saline soil erosion disclosed by the present invention;

[0025] Among them, 1, steel tower leg; 2, pile cap; 3, pile foundation; 4, bolt; 5, protective sleeve; 6, anti-corrosion filler; 7, anchor bar; 8, additional steel bar; 9, saline soil layer. Detailed Embodiments

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0028] The purpose of the present invention is to provide a transmission tower pile foundation jacket and a construction method for resisting saline soil erosion, which can simultaneously achieve the resistance of the concrete pile foundation and the internal steel bars or anchor bars to saline soil erosion, thereby increasing the service life of the transmission tower pile foundation.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] refer to Figure 1 and Figure 2 The transmission tower pile foundation sheath for resisting saline soil erosion disclosed in the embodiment of the present invention at least includes a reinforced concrete pile foundation 3, a protective sheath 5 is provided on the outer periphery of the pile foundation 3, an anti-corrosion filler 6 is poured between the inner wall of the protective sheath 5 and the outer wall of the pile foundation 3, a pile cap 2 is provided on the top of the pile foundation 3, and the pile cap 2 covers the protruding anchor bars 7 of the pile foundation 3. By providing the protective sheath 5 as an outer barrier, the corrosive medium is directly blocked from contacting the pile body, thereby reducing the risk of chemical erosion. The anti-corrosion filler 6 poured between the protective sheath 5 and the pile foundation 3 can neutralize the infiltrated corrosive ions and slow down the deterioration rate of the steel bars and concrete of the pile body. By covering the protruding anchor bars 7 with the pile cap 2, the anchor bars 7 are prevented from being directly exposed to the corrosive environment, thereby preventing the anchoring force from decreasing or the structure from cracking due to rust, thereby achieving all-round protection of the pile foundation 3 structure.

[0031] It should be noted that the anti-corrosion filler 6 can be a modified cement-based material, and the pile foundation 3 is also provided with additional steel bars 8 staggered with the anchor bars 7. When the protective cover 5 is damaged, the protective cover 5 can be replaced or replaced with a protective cover 5 made of other materials, which can effectively reduce the cost of transmission tower maintenance.

[0032] refer to Figure 1 and Figure 2In one embodiment, a steel tower leg 1 connected to a transmission tower leg is provided on the pile cap 2, so as to realize the connection between the pile foundation 3 and the transmission tower leg.

[0033] refer to Figure 1 and Figure 2 As a preferred embodiment, a bolt 4 for connecting with a tower leg of a transmission tower is pre-buried on the top of the pile foundation 3 , and a pile cap 2 extends from the top of the bolt 4 .

[0034] refer to Figure 1 and Figure 2 In one embodiment, the protective cover 5 includes an upper cylinder and a lower vertebra connected to the upper cylinder. The upper cylinder is a cylindrical cylinder. The upper cylinder and the lower cylinder are integrally formed, and a through hole is opened inside the lower vertebra. The inner diameter of the large hole of the lower vertebra is equal to the inner diameter of the cylindrical cylinder, and the inner diameter of the small hole of the lower vertebra is equal to the outer diameter of the pile foundation 3. By setting the lower part of the protective cover 5 as a vertebral structure, the saline soil layer 9 can be matched with the conical surface of the lower vertebra to support the conical surface of the lower vertebra.

[0035] refer to Figure 1 and Figure 2 As a preferred method, the material of the protective sleeve 5 is GFRP (glass fiber reinforced plastic). GFRP, as the material of the protective sleeve 5, achieves a balance between light weight, corrosion resistance and high strength through a fiber-resin composite system.

[0036] refer to Figure 1 and Figure 2 As a preferred method, the anti-corrosion filler 6 is polyurea slurry, which can resist corrosion from media such as acids, alkalis, and salts. The high elastic modulus can adapt to deformation of the substrate and avoid secondary leakage caused by cracking.

[0037] refer to Figure 1 and Figure 2 As an implementation method, the distance between the outer wall of the pile foundation 3 and the inner wall of the protective sleeve 5 is 2 mm to 3 mm.

[0038] The present invention also discloses a method for manufacturing a transmission tower pile foundation 3 jacket that resists saline soil erosion, which is applied to the above-mentioned transmission tower pile foundation 3 jacket that resists saline soil erosion, and comprises the following steps:

[0039] The anchor bars 7 and additional reinforcement bars 8 are buried to increase the strength of the pile foundation 3;

[0040] Casting a concrete pile foundation 3, casting a pile cap 2 on the top of the concrete pile foundation 3, casting a pile cap 2 on the top of the concrete pile foundation 3 to improve the anti-corrosion of the bolt 4 and the anchor bar 7 against the saline soil layer 9;

[0041] After the concrete pile foundation 3 is poured, the soil around the upper part of the pile foundation 3 is excavated to form an installation groove for installing the protective sleeve 5. The high corrosion resistance of the anti-slip sleeve forms an isolation layer protection;

[0042] An anti-corrosion filler 6 is filled between the pile foundation 3 and the protective sleeve 5 until it is flush with the top surface of the pile foundation 3. After the filling of the anti-corrosion filler 6 is completed, it is vibrated compactly to discharge excess air bubbles. The purpose of pouring the anti-corrosion filler 6 is to level the pile surface of the concrete pile foundation 3 and closely bond the gap between the protective sleeve 5 and the pile foundation 3, so as to play a role in protection and prevention of penetration.

[0043] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A transmission tower pile foundation jacket for resisting saline soil erosion, characterized in that: It includes a reinforced concrete pile foundation, a protective sleeve sleeved around the pile foundation, an anti-corrosion filling material poured between the inner wall of the protective sleeve and the outer wall of the pile foundation, and a pile cap arranged on the top of the pile foundation, wherein the pile cap covers the protruding anchor bars of the pile foundation.

2. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 1 is characterized in that: The pile cap is provided with a foot steel tower leg connected to the tower leg of the transmission tower.

3. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 2 is characterized in that: Bolts for connecting with the legs of a transmission tower are pre-buried on the top of the pile foundation, and the pile cap extends out of the top of the bolt.

4. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 1, characterized in that: The protective sleeve comprises an upper cylinder and a lower vertebral body connected to the upper cylinder, and the inner diameter of the lower vertebral body is equal to the outer diameter of the pile foundation.

5. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 4 is characterized in that: The material of the protective sleeve is GFRP.

6. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 1, characterized in that: The anti-corrosion filler is polyurea slurry.

7. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 1, characterized in that: The distance between the outer wall of the pile foundation and the inner wall of the protective sleeve is 2 mm to 3 mm.

8. The transmission tower pile foundation jacket for resisting saline soil erosion according to claim 1, characterized in that: The upper surface of the anti-corrosion filling material is flush with the upper surface of the pile foundation.

9. A construction method for a transmission tower pile foundation jacket for resisting saline soil erosion, characterized in that: The transmission tower pile foundation jacket for resisting saline soil erosion as claimed in any one of claims 1 to 8 comprises the following steps: Embed anchor bars and additional reinforcement; Cast concrete pile foundation and cast pile cap on top of the concrete pile foundation; After the concrete pile foundation is poured, the soil around the upper part of the pile foundation is excavated to form an installation groove for installing the protective sleeve; Fill the anti-corrosion filling material between the pile foundation and the protective sleeve until it is flush with the top surface of the pile foundation.

10. The construction method of the transmission tower pile foundation jacket for resisting saline soil erosion according to claim 9, characterized in that: After the anti-corrosion filling material is filled, it is vibrated and compacted.

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