Iron tower foundation reinforcing structure

Abstract

The utility model relates to the technical field of power transmission iron tower foundation reinforcement, in particular to an iron tower foundation reinforcement structure which comprises a bearing platform, inclined anchor rods, a cushion layer and grouting holes, the grouting holes are formed in a soil body around an original iron tower foundation in the circumferential direction of the original iron tower foundation, and pressure grouting is carried out. Holes and cracks are locally filled through extrusion of soil around the original foundation of the iron tower and permeation of slurry, so that the bearing capacity is improved; the bearing platform is formed on the original foundation of the iron tower and is matched with the inclined anchor rods, so that the pulling resistance and the lateral supporting force of the original foundation of the iron tower are improved, the reinforcing effect on the original foundation of the iron tower is achieved, the stability of the original foundation of the iron tower under complex working conditions and severe environments is enhanced, and normal and safe operation of a power transmission line is ensured.

Description

Technical Field

[0001] This utility model relates to the field of power transmission tower foundation reinforcement technology, specifically to a tower foundation reinforcement structure. Background Technology

[0002] Due to long-term exposure to natural environmental erosion, extreme weather conditions, and external forces, transmission tower foundations may experience varying degrees of aging and damage, such as settlement, concrete cracking, and steel reinforcement corrosion, seriously threatening the safe and stable operation of transmission lines. Therefore, there is an urgent need for an effective tower foundation reinforcement structure to improve the stability of towers in harsh environments, provide strong protection for the safe and stable operation of transmission lines, and reduce safety risks and economic losses caused by foundation problems. Utility Model Content

[0003] The purpose of this utility model is to provide a reinforcement structure for iron tower foundations to improve the stability of iron towers in harsh environments. The specific technical solution is as follows:

[0004] A tower foundation reinforcement structure includes:

[0005] A foundation, which is formed on the original foundation of the iron tower and extends outward beyond the outer edge of the original foundation of the iron tower;

[0006] Multiple inclined anchor rods are installed inside the pier and inserted downward into the soil surrounding the original foundation of the tower.

[0007] A cushion layer is disposed below the foundation and extends outward beyond the outer edge of the foundation, and the cushion layer is directly connected to the ground.

[0008] Furthermore, the foundation is a reinforced concrete structure, and shear-resistant members are provided between the foundation and the original foundation of the tower.

[0009] Furthermore, the foundation includes a steel reinforcement cage, which is located on the outer periphery of the original foundation of the tower and surrounds the tower feet.

[0010] Furthermore, the reinforcing cage includes main reinforcing bars, outer stirrups, and inner stirrups. Multiple main reinforcing bars are arranged at equal intervals along the vertical direction. The outer stirrups are arranged at equal intervals around the outside of the main reinforcing bars, and the inner stirrups are arranged at equal intervals around the inside of the main reinforcing bars. The outer and inner stirrups are fixedly connected to the main reinforcing bars.

[0011] Furthermore, the upper and lower ends of the portion of the tower foot located within the foundation are provided with steel mesh, which is fixedly connected to the steel cage.

[0012] Furthermore, the inclined anchor rod includes an anchor bar and a cement mortar layer. One end of the anchor bar is embedded in the steel cage and fixedly connected to the steel cage, while the other end of the anchor bar is inserted into the soil near the original foundation of the tower. The portion of the anchor bar inserted into the soil is covered with a cement mortar layer.

[0013] Furthermore, a steel plate is connected to one end of the anchor bar embedded in the reinforcing cage, and the steel plate is welded to the reinforcing cage.

[0014] Furthermore, grouting holes are provided in the soil surrounding the original foundation of the tower along the circumference of the original foundation, and the depth of the grouting holes is less than the depth of the original foundation of the tower below the ground.

[0015] The application of the technical solution of this utility model has the following beneficial effects:

[0016] (1) This utility model provides a reinforcement structure for the foundation of a steel tower. Grouting holes are opened in the soil around the original foundation of the steel tower along the circumference of the original foundation and pressure grouting is performed. By squeezing the soil around the original foundation of the steel tower and penetrating the grout, voids and cracks are locally filled, thereby improving the bearing capacity. A bearing platform is formed on the original foundation of the steel tower in conjunction with the use of inclined anchor rods to improve the pull-out resistance and lateral support of the original foundation of the steel tower, thereby achieving the reinforcement effect of the original foundation of the steel tower, enhancing the stability of the steel tower foundation under complex working conditions and harsh environments, and ensuring the normal and safe operation of the transmission line.

[0017] (2) In this utility model, the upper and lower ends of the part of the tower foot located in the foundation are provided with steel mesh. By setting the steel mesh, the tensile stress on both sides of the crack can be borne, thus limiting the development of the crack.

[0018] (3) In this utility model, grouting holes are provided in the soil surrounding the original foundation of the iron tower along the circumference of the original foundation of the iron tower. The depth of the grouting holes is less than the depth of the original foundation of the iron tower below the ground, so as to prevent the original foundation of the iron tower from being lifted and damaged after grouting.

[0019] (4) In this utility model, the setting of the cushion layer can distribute the load above to the soil and prevent water and other substances from eroding the concrete structure of the foundation, thus ensuring the durability of the foundation.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is an overall schematic diagram of the iron tower foundation reinforcement structure in this utility model;

[0023] Figure 2 This is a schematic diagram of the grouting hole arrangement;

[0024] Figure 3 This is a top view showing the connection between the inclined anchor rods and the steel cage and the original foundation of the iron tower.

[0025] Figure 4 This is a schematic diagram showing the connection between the steel mesh and the tower base;

[0026] Among them, 1. Foundation, 1.1. Reinforcing cage, 1.1.1. Main reinforcing bars, 1.1.2. External stirrups, 1.1.3. Internal stirrups, 1.2. Reinforcing mesh, 2. Original foundation of the iron tower, 3. Inclined anchor rods, 3.1. Anchor bars, 3.2. Cement mortar layer, 3.3. Steel plate, 4. Pad layer, 5. Shear-resistant components, 6. Tower foot, 7. Grouting holes. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] Example:

[0031] See Figure 1 This embodiment provides a tower foundation reinforcement structure, including:

[0032] A foundation 1 is formed on the original foundation 2 of the iron tower and extends outward from the outer edge of the original foundation 2 of the iron tower.

[0033] Multiple inclined anchor rods 3 are installed inside the foundation 1 and inserted downward into the soil around the original foundation 2 of the iron tower;

[0034] A subbase 4 is provided below the foundation 1 and extends outward beyond the outer edge of the foundation 1, directly connecting to the ground. In this embodiment, the subbase 4 is cast with C15 strength grade concrete. By setting the subbase 4, the load above is distributed to the soil, preventing moisture and other substances from eroding the concrete structure of the foundation 1 and ensuring the durability of the foundation 1. The thickness of the subbase 4 and the strength grade of the concrete can be adjusted adaptively according to the actual soil conditions.

[0035] Grouting holes 7: Multiple grouting holes 7 are drilled circumferentially in the soil surrounding the original foundation 2 of the tower. Concrete or micro-expansion cement grout is used to fill these holes, locally filling voids and cracks in the original foundation and increasing the protective layer for the foundation reinforcement. See also... Figure 2 Preferably, the grouting holes 7 are arranged in pairs opposite each other along the circumference of the original foundation 2 of the iron tower, and the number of grouting holes 7 is arranged according to the diameter of the original foundation 2 of the iron tower and a certain hole spacing is maintained; the depth of the grouting holes 7 is less than the depth of the original foundation 2 of the iron tower below the ground, so as to prevent the original foundation 2 of the iron tower from being lifted and damaged after grouting.

[0036] The foundation 1 is a reinforced concrete structure, and shear members 5 are provided between the foundation 1 and the original foundation 2 of the tower. Specifically, multiple shear members 5 are provided circumferentially on the side of the original foundation 2 of the tower. The shear members 5 are made of fully threaded bolts, with one end inserted into the concrete structure of the original foundation 2 and the other end in the concrete structure of the foundation 1. The foundation 1 is connected to the original foundation 2 of the tower through the shear members 5, so that the foundation 1 and the original foundation 2 of the tower work together to bear the load transmitted from the upper tower.

[0037] The foundation 1 includes a reinforcing cage 1.1, which is located on the outer periphery of the original foundation 2 of the tower and surrounds the tower feet 6. See also... Figure 1 and Figure 4 The tower foot 6 located inside the foundation 1 has steel mesh 1.2 arranged at both the upper and lower ends. The steel mesh 1.2 is fixedly connected to the steel cage 1.1. By setting the steel mesh 1.2, the tensile stress on both sides of the crack can be borne, thus limiting the development of the crack.

[0038] In this embodiment, see Figure 3The reinforcing cage 1.1 includes main reinforcing bars 1.1.1, outer stirrups 1.1.2, and inner stirrups 1.1.3. Multiple main reinforcing bars 1.1.1 are arranged at equal intervals along the vertical direction. The outer stirrups 1.1.2 are arranged at equal intervals around the outer side of the main reinforcing bars 1.1.1, and the inner stirrups 1.1.3 are arranged at equal intervals around the inner side of the main reinforcing bars 1.1.1. The outer stirrups 1.1.2 and the inner stirrups 1.1.3 are fixedly connected to the main reinforcing bars 1.1.1 by welding or binding.

[0039] In this embodiment, see Figure 3 The inclined anchor rod 3 includes an anchor bar 3.1 and a cement mortar layer 3.2. One end of the anchor bar 3.1 is embedded in the reinforcing cage 1.1 and fixedly connected to it. The other end of the anchor bar 3.1 is inserted into the soil near the original foundation 2 of the tower. The portion of the anchor bar 3.1 inserted into the soil is covered with a cement mortar layer 3.2. The angle of incidence of the anchor bar 3.1 embedded in the reinforcing cage 1.1 and the length of its insertion into the soil can be adjusted according to the actual stress conditions.

[0040] In this embodiment, the end of the anchor bar 3.1 embedded in the steel cage 1.1 is connected to a steel plate 3.3, and the steel plate 3.3 is welded to the steel cage 1.1; the steel plate can increase the contact area between the anchor bar 3.1 and the steel cage 1.1 and enhance the connection strength between the anchor bar 3.1 and the steel cage 1.1.

[0041] The tower foundation reinforcement structure provided in this embodiment can effectively solve the problem of insufficient pull-out force and lateral support force of the original foundation of the transmission tower under harsh environment and external force, provide more stable support for the tower foundation, enhance the stability of the tower foundation under various complex working conditions, and ensure the normal and safe operation of the transmission line.

[0042] The reinforcement of the original foundation of the iron tower using the foundation reinforcement structure described above includes the following steps:

[0043] Step S1: Excavate around the original foundation 2 of the iron tower until the original soil layer is exposed. Drill grouting holes 7 around the original foundation 2 of the iron tower in the surrounding soil. The lowest point of the grouting hole 7 is 1.5-2 meters above the lowest point of the original foundation 2 of the iron tower to prevent the original foundation 2 of the iron tower from being lifted and damaged after grouting. Grout the grouting holes 7 with concrete or micro-expansion cement grout.

[0044] Preferably, the drilling and grouting of the grouting holes 7 are carried out by drilling holes one by one from opposite sides and grouting one hole at a time. The drilling and grouting of the next grouting hole 7 is only carried out after the grout in one grouting hole 7 has solidified. See [reference needed]. Figure 2The drilling and grouting sequence is a1-a2-b1-b2-c1-c2-d1-d2. Using this sequence for drilling and grouting can make the grout more evenly distributed around the foundation soil, effectively prevent the grout from flowing between different grouting holes 7, ensure the grouting quality of each grouting hole 7, and minimize disturbance to the original foundation 2 of the tower.

[0045] Step S2: Clean and level the site around the original foundation 2 of the iron tower. Use C15 strength grade concrete to pour a cushion layer 4 around the original foundation 2 of the iron tower. The thickness of the cushion layer 4 is between 100 and 150 mm, and it is 50 mm longer than the outer edge of the foundation 1. The cushion layer 4 will distribute the load above to the ground and prevent moisture and other substances from eroding the concrete structure of the foundation 1, thus ensuring the durability of the foundation 1.

[0046] Step S3: Weld steel mesh 1.2 at the bottom and top of the tower foot 6 at the designated positions; insert multiple shear members 5 along the circumference at the designated positions on the side of the original foundation 2 of the tower, with a certain length exposed.

[0047] Step S4: Install a steel cage 1.1 around the outer perimeter of the original foundation 2 of the iron tower. The bottom of the steel cage 1.1 is connected to the pad layer 4, and the upper part of the steel cage 1.1 is connected to the steel mesh 1.2 on the upper part of the tower foot 6.

[0048] The upper ends of multiple anchor bars 3.1 are inserted into the steel cage 1.1 at the specified incident angle. The anchor bars 3.1 are then welded to the steel cage 1.1 and the steel plate 3.3 at their ends to form an integral structure. The lower ends of the anchor bars 3.1 are embedded into the soil near the original foundation 2 of the tower until a certain length of strongly weathered or moderately weathered rock is formed. Cement mortar is poured into the part of the anchor bars 3.1 embedded in the soil.

[0049] Step S5: Roughen the contact surface between the original foundation 2 and the pile cap 1 of the iron tower to increase the roughness of the contact surface between the original foundation 2 and the pile cap 1 and improve the adhesion between the two; pour concrete for the steel cage 1.1 and anchor bar 3.1 and cure it until it reaches the design strength. The original foundation 2 of the iron tower, the inclined anchor bar 3 and the pile cap 1 form an integral whole and work together to resist external loads.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reinforcement structure for a steel tower foundation, characterized in that, include: A foundation (1) is formed on the original foundation (2) of the iron tower and extends outward from the outer edge of the original foundation (2); Multiple inclined anchor rods (3) are installed inside the foundation (1) and inserted downward into the soil around the original foundation (2) of the iron tower; A cushion layer (4) is provided below the foundation (1) and extends outward from the outer edge of the foundation (1). The cushion layer (4) is directly connected to the ground.

2. The tower foundation reinforcement structure according to claim 1, characterized in that, The foundation (1) is a reinforced concrete structure, and a shear-resistant member (5) is provided between the foundation (1) and the original foundation (2) of the iron tower.

3. The tower foundation reinforcement structure according to claim 1, characterized in that, The foundation (1) includes a steel cage (1.1), which is located on the outer periphery of the original foundation (2) of the iron tower and surrounds the tower foot (6).

4. The tower foundation reinforcement structure according to claim 3, characterized in that, The steel cage (1.1) includes main reinforcing bars (1.1.1), outer stirrups (1.1.2), and inner stirrups (1.1.3). Multiple main reinforcing bars (1.1.1) are arranged at equal intervals along the vertical direction. The outer stirrups (1.1.2) are arranged at equal intervals around the outside of the main reinforcing bars (1.1.1). The inner stirrups (1.1.3) are arranged at equal intervals around the inside of the main reinforcing bars (1.1.1). The outer stirrups (1.1.2) and inner stirrups (1.1.3) are fixedly connected to the main reinforcing bars (1.1.1).

5. The tower foundation reinforcement structure according to claim 3, characterized in that, The upper and lower ends of the portion of the tower foot (6) located inside the foundation (1) are provided with steel mesh (1.2), and the steel mesh (1.2) is fixedly connected to the steel cage (1.1).

6. The tower foundation reinforcement structure according to claim 3, characterized in that, The inclined anchor rod (3) includes an anchor bar (3.1) and a cement mortar layer (3.2). One end of the anchor bar (3.1) is embedded in the steel cage (1.1) and fixedly connected to the steel cage (1.1). The other end of the anchor bar (3.1) is inserted into the soil near the original foundation (2) of the iron tower. The part of the anchor bar (3.1) inserted into the soil is covered with a cement mortar layer (3.2).

7. The tower foundation reinforcement structure according to claim 6, characterized in that, The end of the anchor bar (3.1) embedded in the steel cage (1.1) is connected to a steel plate (3.3), and the steel plate (3.3) is welded to the steel cage (1.1).

8. The tower foundation reinforcement structure according to any one of claims 1-7, characterized in that, Grouting holes (7) are provided in the soil surrounding the original foundation (2) of the iron tower along the circumference of the original foundation (2). The depth of the grouting holes (7) is less than the depth of the original foundation (2) of the iron tower below the ground.

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