In-situ reinforcing method for power transmission line tower foundation and miniature pipe pile reinforcing device

Abstract

The invention provides an in-situ reinforcing method for a power transmission line tower foundation and a miniature pipe pile reinforcing device, and belongs to the technical field of power transmission. The method comprises the following steps that a hole is formed in a foundation to be reinforced, and a mounting hole penetrating through the foundation and penetrating into the foundation is formed; the first connecting pipe is hoisted to the position above the mounting hole, and the first connecting pipe is moved into the mounting hole; a reinforcing material is poured between the outer wall of the first connecting pipe and the hole wall of the mounting hole, and a first reinforcing cylinder connected with the outer wall of the first connecting pipe and the hole wall of the mounting hole is formed through curing; a reinforcing material is poured into the first connecting pipe and cured to form a reinforcing column connected with the inner wall of the first connecting pipe; and fixedly connecting the first connecting pipe and the foundation. According to the method, the original foundation of the power transmission line tower is reinforced, rapid construction is achieved on the premise that the original terrain and environment are not changed, the anti-overturning capacity and stability are improved, and the requirement for power transmission is met.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission, and in particular relates to an in-situ reinforcement method for a transmission line tower foundation and a micro-pipe pile reinforcement device. Background Art

[0002] With the development of power technology and the improvement of power systems, the scale of transmission lines has expanded year by year. As the main structure of transmission line laying, the stability of transmission line towers is crucial to the normal use of transmission lines.

[0003] At present, due to natural disasters, extreme weather conditions or transmission line transformation and upgrading, as the load-bearing structure of the transmission line tower, the transmission line tower foundation may face the problem of exceeding the design bearing capacity. Therefore, in order to ensure the stability and safety of the transmission line tower, the transmission line tower foundation needs to be reinforced in time.

[0004] However, as shown in the records of the Chinese invention patent with application number "201410443979.X" and the Chinese invention patent with application number "202210965846.3", when the existing transmission line tower foundation is reinforced, the stability is mainly improved by increasing the cross-sectional area of ​​the transmission line tower foundation. This method has the disadvantage of long construction time and may require the demolition of the old transmission line tower foundation, which is difficult to achieve in some special terrains or environments, greatly reducing the construction efficiency of the transmission line tower foundation reinforcement. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to improve the construction efficiency while ensuring the reinforcement effect of the transmission line tower foundation. In view of the shortcomings of the prior art, an in-situ reinforcement method for the transmission line tower foundation and a micro-pipe pile reinforcement device are provided.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides an in-situ reinforcement method for a transmission line tower foundation, comprising the following steps:

[0008] Drilling a hole in the foundation to be reinforced to form a mounting hole that penetrates the foundation and into the ground;

[0009] Hoisting the first connecting pipe of the micro-pipe pile reinforcement device to the top of the installation hole, and moving the first connecting pipe into the installation hole;

[0010] Casting a reinforcing material between the outer wall of the first connecting pipe and the hole wall of the mounting hole, and solidifying the material to form a first reinforcing tube connected to the outer wall of the first connecting pipe and the hole wall of the mounting hole respectively;

[0011] pouring the reinforcing material in the first connecting pipe and solidifying it to form a reinforcing column connected to the inner wall of the first connecting pipe;

[0012] The first connecting pipe and the foundation are fixedly connected.

[0013] Compared with the prior art, the in-situ reinforcement method of the foundation of the power transmission line tower of the present invention has the following beneficial effects: by inserting the first connecting pipe into the foundation to achieve connection and fixation with the foundation, the reinforcement effect of the foundation of the power transmission line tower is ensured, the structural stability of the power transmission line tower is effectively improved, and the entire installation process is relatively simple, which can effectively improve the construction efficiency. In addition, it can be used not only for the reinforcement of the new foundation of the power transmission line tower, but also for the reinforcement of the original foundation of the power transmission line tower, effectively meeting the needs of power transmission, and improving the anti-overturning ability and stability of the foundation without changing the original terrain and environment, and the application range is relatively wide. Specifically, the strengthening material is poured and solidified between the outer wall of the first connecting pipe and the hole wall of the installation hole to form a first strengthening tube, so as to achieve effective engagement with the soil layer of the foundation, improve the friction between the soil layer of the foundation under the action of the pull-out load, and the installation of the first connecting pipe and the pouring of the first strengthening tube are relatively simple, and can be quickly constructed at the construction site; at the same time, the strengthening material is poured and solidified in the first connecting pipe to form a strengthening column with a stable structure, which can not only effectively improve the structural strength of the first connecting pipe, but also can be quickly constructed at the construction site.

[0014] Optionally, the drilling of a hole on the foundation to be reinforced to form a mounting hole that penetrates the foundation and penetrates the ground specifically includes:

[0015] Obtaining the position and number of the mounting holes to be drilled, wherein there are a plurality of mounting holes, and the plurality of mounting holes are evenly spaced around the central axis of the foundation;

[0016] Obtaining a preset hole diameter and a preset hole depth of the mounting hole;

[0017] Holes are opened on the foundation according to the positions, number and preset hole diameters of the mounting holes, and the mounting holes are formed by drilling according to the preset hole depths.

[0018] Optionally, the outer diameter of the first connecting pipe is 90mm-120mm, the preset hole diameter is 180mm-240mm, and the preset hole depth is 6m-10m.

[0019] Optionally, drilling the mounting hole according to the preset hole depth specifically includes: drilling a hole with preset parameters and the preset hole depth by a drill rod to form the mounting hole, wherein the preset parameters include center offset and verticality, the center offset is less than 20 mm, and the verticality is less than or equal to 1%.

[0020] Optionally, the first connecting pipe includes a flange and a segmented pipe, the segmented pipe is provided in plurality, and the plurality of segmented pipes are coaxially connected through the flange. Before the first connecting pipe of the micro-pipe pile reinforcement device is hoisted above the mounting hole, the in-situ reinforcement method for the transmission line tower foundation further includes:

[0021] Acquiring a preset length of the first connecting pipe according to the preset hole depth;

[0022] Determining the number of the segmented pipes and the flanges according to the preset length of the first connecting pipe;

[0023] The segmented pipes are coaxially connected in pairs through the flange to obtain the first connecting pipe having a length equal to the preset length.

[0024] Optionally, the micro-pipe pile reinforcement device further includes a second connecting pipe and a reinforcing connector. Before the first connecting pipe of the micro-pipe pile reinforcement device is hoisted above the mounting hole, the in-situ reinforcement method of the transmission line tower foundation further includes:

[0025] The second connecting tube is sleeved on the outer side of one end of the first connecting tube and is coaxially arranged with the first connecting tube, so that after the first connecting tube passes through the mounting hole, the second connecting tube abuts against the edge of the mounting hole;

[0026] The reinforcing connecting member is placed between the inner wall of the second connecting tube and the outer wall of the first connecting tube, and is fixedly connected to the inner wall of the second connecting tube and the outer wall of the first connecting tube respectively.

[0027] Optionally, the fixed connection between the first connecting pipe and the foundation specifically includes:

[0028] After the second connecting pipe abuts against the edge of the mounting hole, the reinforcing material is poured between the inner wall of the second connecting pipe and the outer wall of the first connecting pipe, and solidified to form a second reinforcing tube respectively connected to the inner wall of the second connecting pipe, the outer wall of the first connecting pipe and the foundation.

[0029] Optionally, the fixed connection between the first connecting pipe and the foundation further comprises:

[0030] After the second connecting pipe abuts against the edge of the mounting hole, the reinforcing material is poured on the outer side of the second connecting pipe and solidified to form a third reinforcing tube respectively connected to the outer wall of the second connecting pipe and the foundation.

[0031] Optionally, after drilling a hole on the foundation to be reinforced to form an installation hole that penetrates the foundation and penetrates the ground, and before hoisting the first connecting pipe of the micro-pipe pile reinforcement device to the top of the installation hole, the in-situ reinforcement method of the power transmission line tower foundation further includes:

[0032] Protrusions and / or grooves are formed on the inner wall of the mounting hole, wherein the protrusions and / or the grooves are distributed in a spiral shape around the axial direction of the mounting hole.

[0033] In a second aspect, the present invention further provides a micro-pipe pile reinforcement device, which is applied to the in-situ reinforcement method of the transmission line tower foundation as described above, and the micro-pipe pile reinforcement device includes a first connecting pipe, a first reinforcement tube and a reinforcement column.

[0034] Compared with the prior art, the beneficial effects of the micro-pipe pile reinforcement device of the present invention are similar to the beneficial effects of the in-situ reinforcement method of the transmission line tower foundation as described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] Figure 1 : Flow chart of the in-situ reinforcement method for the transmission line tower foundation in an embodiment of the present invention;

[0037] Figure 2 : A schematic diagram of the installation of the micro-pipe pile reinforcement device in an embodiment of the present invention;

[0038] Figure 3 : Schematic diagram of basic drilling in an embodiment of the present invention;

[0039] Figure 4 : A structural schematic diagram of a micro-pipe pile reinforcement device from one perspective in an embodiment of the present invention;

[0040] Figure 5 : A structural schematic diagram of the micro-pipe pile reinforcement device from another perspective in an embodiment of the present invention;

[0041] Figure 6 : Flow chart of casting and installation of micro-pipe pile reinforcement device in an embodiment of the present invention.

[0042] Among them, 1-foundation, 11-installation hole, 2-first connecting pipe, 3-first strengthening cylinder, 4-strengthening column, 5-second connecting pipe, 6-strengthening connecting piece, 7-second strengthening cylinder, 8-third strengthening cylinder. DETAILED DESCRIPTION

[0043] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and drawings. Although certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only used for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0044] It should be noted that the Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the Y axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the Y axis represents the front side, and the reverse direction of the Y axis represents the back side; the X axis in the drawings represents the left and right position, and the positive direction of the X axis represents the right side, and the reverse direction of the X axis represents the left side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0045] First, as Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an in-situ reinforcement method for a power transmission line tower foundation, comprising the following steps: drilling a hole on a foundation 1 to be reinforced to form an installation hole 11 that penetrates the foundation 1 and penetrates into the foundation; hoisting a first connecting pipe 2 of a micro-pipe pile reinforcement device to the top of the installation hole 11, and moving the first connecting pipe 2 into the installation hole 11; pouring a reinforcing material between an outer wall of the first connecting pipe 2 and a hole wall of the installation hole 11, and solidifying to form a first reinforcing tube 3 that is respectively connected to the outer wall of the first connecting pipe 2 and the hole wall of the installation hole 11; pouring a reinforcing material in the first connecting pipe 2, and solidifying to form a reinforcing column 4 that is connected to the inner wall of the first connecting pipe 2; and fixing the first connecting pipe 2 and the foundation 1.

[0046] Specifically, the reinforcing material can be high-strength corrosion-resistant concrete, or steel slag concrete or metal material, etc.; the first connecting pipe 2 can be made of metal material, or made of non-metallic materials such as concrete. For example, the first connecting pipe 2 is a steel pipe.

[0047] In this embodiment, Figure 1 and Figure 2As shown, first, a hole is drilled on the foundation 1 to be reinforced to form an installation hole 11 that can penetrate the foundation 1 and into the foundation. At the same time, the first connecting pipe 2 of the micro-pipe pile reinforcement device is hoisted and moved into the installation hole 11 to ensure the installation accuracy of the first connecting pipe 2. At this time, a part of the first connecting pipe 2 is located in the foundation 1, and the other part is located in the foundation. Reinforcing material is poured between the outer wall of the first connecting pipe 2 and the hole wall of the installation hole 11 to fill the gap between the first connecting pipe 2 and the installation hole 11, and the reinforcing material can be solidified to form a first reinforcing tube 3 after pouring. In this way, since the first reinforcing tube 3 is formed by pouring and solidifying the reinforcing material, it can form an effective bite with the soil layer of the foundation, thereby improving the friction between the soil layer of the foundation under the action of the pull-out load, and the installation of the first connecting pipe 2 and the pouring of the first reinforcing tube 3 are relatively simple, and can be quickly constructed at the construction site; then, in the first Reinforcement material is poured into the connecting pipe 2. Since a first reinforcement tube 3 is formed on the outer side of the first connecting pipe 2, the reinforcement material can be cured in the first connecting pipe 2 to form a reinforcement column 4 with a stable structure. This arrangement can not only effectively improve the structural strength of the first connecting pipe 2, but also can be quickly constructed at the construction site. Finally, the first connecting pipe 2 and the foundation 1 are fixedly connected, so that the first connecting pipe 2, the first reinforcement tube 3 and the reinforcement column 4 form a reinforcement of the foundation 1, which effectively improves the structural stability of the foundation 1 and ensures the reinforcement effect of the foundation 1 of the transmission line tower. The entire installation process is relatively simple, which can effectively improve the construction efficiency. It can not only be used to reinforce the new foundation 1 of the transmission line tower, but also can be used to reinforce the original foundation 1 of the transmission line tower, effectively meeting the needs of power transmission, and improving the anti-overturning ability and stability of the foundation 1 without changing the original terrain and environment. It has a wide range of applications.

[0048] For example, Figure 6 As shown, the first connecting pipe 2 is a steel pipe. Before the first connecting pipe 2 is hoisted and moved, the first connecting pipe 2 is inspected to observe whether there are structural defects such as holes on the first connecting pipe 2. The first connecting pipe 2 is also derusted to ensure the service life of the first connecting pipe 2 after installation; before pouring the reinforcing material into the mounting hole 11, the mounting hole 11 is cleaned by injecting water to prevent impurities from affecting the subsequent curing effect of the reinforcing material and the structural stability after curing; after completing the pouring of the reinforcing material into the mounting hole 11, while pouring the reinforcing material into the first connecting pipe 2, the first connecting pipe 2 is vented, such as by inserting a vibrating rod for vibration, to avoid bubbles in the reinforcing material after pouring and curing, thereby ensuring the structural stability of the reinforcing column 4.

[0049] It should be noted that in Figure 6In the corresponding embodiment, the in-situ reinforcement method of the transmission line tower foundation has the following advantages: the construction is relatively simple, and combined with the verification results during the construction of the original foundation 1, a micro-pipe pile reinforcement device is set around the foundation 1 of the original transmission line tower according to the project requirements; this method does not require excavation of the foundation, has little impact on the on-site environment of the foundation 1, and has less interference with the surrounding facilities of the transmission line tower; it adopts a mixed structure design of steel pipes and high-strength concrete, has high corrosion resistance and durability, and can provide long-term support and reinforcement for the foundation 1; it can be applied to construction conditions with limited space around the foundation 1, and can also be used to reinforce the foundation 1 that does not have the conditions for foundation excavation or has a relatively complex surrounding environment; the construction is relatively simple, the construction period is relatively short, which helps to reduce labor costs and equipment rental costs, and has certain advantages in construction costs compared to the cross-section enlargement method in the prior art.

[0050] Alternatively, if Figure 2 As shown, drilling a hole on the foundation 1 to be reinforced to form a mounting hole 11 that penetrates the foundation 1 and penetrates the foundation specifically includes: obtaining the position and number of the mounting holes 11 to be drilled, wherein there are multiple mounting holes 11, and the multiple mounting holes 11 are evenly spaced around the central axis of the foundation 1; obtaining a preset hole diameter and a preset hole depth of the mounting hole 11; drilling a hole on the foundation 1 according to the position, number and preset hole diameter of the mounting hole 11, and drilling to form the mounting hole 11 according to the preset hole depth.

[0051] Specifically, the position and number of the mounting holes 11 are set according to the cross-sectional area and cross-sectional shape of the base 1 of the transmission line tower. For example, Figure 3 As shown, the number of mounting holes 11 is 8, and they are arranged at equal intervals around the central axis of the foundation 1; the preset hole diameter is selected according to the cross-sectional area of ​​the foundation 1 and the number of mounting holes 11, and the curing effect of the first connecting pipe 2 on the foundation 1 is guaranteed without destroying the structural stability of the foundation 1. Correspondingly, the preset hole depth is set according to the height of the foundation 1 and the soil conditions of the foundation, and the connection stability of the first connecting pipe 2 and the foundation through the first reinforcement tube 3 is guaranteed.

[0052] In this optional embodiment, if Figure 3 As shown, when drilling holes on the foundation 1, the positions and number of the mounting holes 11 to be drilled are first obtained. For example, Figure 6 As shown, measurement and positioning are performed on the foundation 1; then the preset hole diameter and preset hole depth of the mounting hole 11 are obtained; finally, holes are drilled on the foundation 1 according to the position, number and preset hole diameter of the mounting hole 11 to ensure the accuracy of the position and hole diameter of the mounting hole 11, and then the mounting hole 11 is drilled according to the preset hole depth to ensure the accuracy of the hole depth of the mounting hole 11. For example, Figure 6As shown, after the installation hole 11 is drilled, the hole depth and hole diameter of the installation hole 11 need to be checked to further ensure the reinforcement effect of the foundation 1 after the installation is completed.

[0053] Optionally, the outer diameter of the first connecting pipe 2 is 90 mm-120 mm, the preset hole diameter is 180 mm-240 mm, and the preset hole depth is 6 m-10 m.

[0054] Specifically, the outer diameter of the first connecting pipe 2 is 100 mm, the preset hole diameter is 200 mm, and the preset hole depth is 8 m.

[0055] In this optional embodiment, first, a preset aperture is selected within the range of 180mm-240mm. For example, a preset aperture of 200mm is selected, and the outer diameter of the first connecting pipe 2 is selected within the range of 90mm-120mm based on the preset aperture of 200mm, so as to ensure the structural strength of the first connecting pipe 2 itself and reserve a size margin for pouring and curing the first reinforcement tube 3, so as to facilitate the subsequent pouring of the first reinforcement tube 3 and ensure the structural strength of the first reinforcement tube 3 after curing; finally, a preset hole depth is selected within the range of 6m-10m based on the preset aperture, the height of the foundation 1 and the soil quality of the foundation, and the length of the first connecting pipe 2 is selected based on the preset hole depth, so as to ensure the subsequent reinforcement effect of the foundation 1.

[0056] Optionally, drilling to form the mounting hole 11 according to a preset hole depth specifically includes: drilling a hole with preset parameters and a preset hole depth through a drill rod to form the mounting hole 11, wherein the preset parameters include center offset and verticality, the center offset is less than 20 mm, and the verticality is less than or equal to 1%.

[0057] Specifically, the center offset is the center offset of the drill rod, and the verticality is the verticality of the drill rod relative to the foundation 1 .

[0058] In this optional embodiment, in order to ensure the drilling accuracy of the mounting hole 11 and the subsequent reinforcement effect, when the drilling operation is carried out by using a drill rod, it is necessary to ensure that the center deviation of the drill rod is less than 20 mm, so as to ensure that the position of the mounting hole 11 finally formed is accurate. At the same time, it is necessary to ensure that the verticality of the drill rod relative to the foundation 1 is less than or equal to 1%, so as to ensure that the mounting hole 11 finally formed can extend to the required depth in the foundation, so as to ensure the subsequent reinforcement effect of the foundation 1.

[0059] Optionally, the first connecting pipe 2 includes a flange and a segmented pipe, there are multiple segmented pipes, and the multiple segmented pipes are coaxially connected by the flange. Before hoisting the first connecting pipe 2 of the micro-pipe pile reinforcement device to the top of the installation hole 11, the in-situ reinforcement method of the transmission line tower foundation also includes: obtaining a preset length of the first connecting pipe 2 according to a preset hole depth; determining the number of segmented pipes and flanges according to the preset length of the first connecting pipe 2; and coaxially connecting the segmented pipes in pairs through the flange to obtain a first connecting pipe 2 with a preset length.

[0060] Specifically, a flange can be selected as a structure for coaxially connecting the two segmented pipes, or matching internal and external threads can be directly provided at opposite ends of the segmented pipes, so that the two segmented pipes can be coaxially connected through corresponding internal and external threads.

[0061] In this optional embodiment, a flange and a segmented pipe are provided to form a first connecting pipe 2, wherein before the first connecting pipe 2 is hoisted, the required preset length of the first connecting pipe 2 can be obtained according to the preset hole depth, and then a plurality of segmented pipes are assembled through the flange according to the preset length to form a first connecting pipe 2 that meets the preset length requirement, thereby effectively improving the applicable scenarios of the first connecting pipe 2, meeting the reinforcement needs of the foundation 1 under different environments or soil conditions, and improving the scope of application.

[0062] Alternatively, if Figure 2 and Figure 5 As shown, the micro-pipe pile reinforcement device also includes a second connecting tube 5 and a reinforcing connector 6. Before hoisting the first connecting tube 2 of the micro-pipe pile reinforcement device to the top of the mounting hole 11, the in-situ reinforcement method of the transmission line tower foundation also includes: sleeve the second connecting tube 5 on the outside of one end of the first connecting tube 2, and coaxially arrange it with the first connecting tube 2, so that after the first connecting tube 2 passes through the mounting hole 11, the second connecting tube 5 abuts against the edge of the mounting hole 11; place the reinforcing connector 6 between the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2, and fix it to the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2 respectively.

[0063] Specifically, the second connecting pipe 5 cooperates with the end of the first connecting pipe 2 through the reinforcing connector 6 to form a cap-shaped structure. The second connecting pipe 5 can be made of metal material, such as a steel pipe. The second connecting pipe 5 can also be made of non-metallic materials such as concrete. Correspondingly, the material solidified to form the reinforcing connector 6 can be non-metal such as high-strength corrosion-resistant concrete, or it can be a metal material such as steel.

[0064] In this optional embodiment, if Figure 2 , Figure 4 and Figure 5As shown, the micro-pipe pile reinforcement device is also provided with a second connecting tube 5 and a reinforcing connecting piece 6. Before the first connecting tube 2 is hoisted, the second connecting tube 5 is coaxially sleeved on the outer side of the end of the first connecting tube 2, thereby increasing the cross-sectional area of ​​the end of the first connecting tube 2, so that when the first connecting tube 2 is inserted into the mounting hole 11, the second connecting tube 5 can be against the edge of the mounting hole 11, thereby not only playing a limiting role for the first connecting tube 2, but also facilitating the subsequent connection with the foundation 1; then, the reinforcing connecting piece 6 is placed between the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2, and is fixedly connected to the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2 respectively, thereby realizing a stable connection between the second connecting tube 5 and the first connecting tube 2, and at the same time improving the structural strength of the end of the first connecting tube 2, facilitating the stability of the first connecting tube 2 after the subsequent connection with the foundation 1 is completed, thereby improving the reinforcement effect of the foundation 1.

[0065] For example, Figure 6 As shown, a cross steel bar may be welded between the second connecting tube 5 and the first connecting tube 2 to form a reinforcing connector 6, wherein when the cross steel bar is welded, a welded symmetrical bracket is used to coaxially align the first connecting tube 2 with the second connecting tube 5.

[0066] Alternatively, if Figure 2 and Figure 4 As shown, the fixed connection between the first connecting tube 2 and the foundation 1 specifically includes: after the second connecting tube 5 abuts against the edge of the mounting hole 11, a reinforcing material is poured between the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2, and solidified to form a second reinforcing tube 7 respectively connected to the inner wall of the second connecting tube 5, the outer wall of the first connecting tube 2 and the foundation 1.

[0067] Specifically, the reinforcing material may be high-strength corrosion-resistant concrete, or steel slag concrete or metal material, etc.

[0068] In this optional embodiment, if Figure 4 and Figure 5 As shown, when the first connecting tube 2 and the foundation 1 are fixedly connected, the first connecting tube 2 has been inserted into the mounting hole 11, and the second connecting tube 5 is also against the edge of the mounting hole 11, then the reinforcing material is poured between the inner wall of the second connecting tube 5 and the outer wall of the first connecting tube 2, so that the reinforcing material fills the gap between the first connecting tube 2 and the second connecting tube 5. The second reinforcing tube 7 fixedly formed by the reinforcing material can improve the structural strength of the end of the first connecting tube 2 while being respectively connected to the inner wall of the second connecting tube 5, the outer wall of the first connecting tube 2 and the foundation 1, thereby realizing the fixed connection between the first connecting tube 2 and the foundation 1, and effectively improving the reinforcement effect of the foundation 1.

[0069] Alternatively, if Figure 2 and Figure 4As shown, the fixed connection between the first connecting pipe 2 and the foundation 1 specifically also includes: after the second connecting pipe 5 abuts against the edge of the mounting hole 11, a reinforcing material is poured on the outside of the second connecting pipe 5 and solidified to form a third reinforcing tube 8 respectively connected to the outer wall of the second connecting pipe 5 and the foundation 1.

[0070] Specifically, the reinforcing material may be high-strength corrosion-resistant concrete, or steel slag concrete or metal material, etc.

[0071] In this optional embodiment, if Figure 4 and Figure 5 As shown, in order to further improve the structural strength of the end of the first connecting tube 2 and the connection stability with the foundation 1, after the second connecting tube 5 is abutted against the edge of the mounting hole 11, a reinforcing material is poured on the outside of the second connecting tube 5, thereby solidifying to form a third reinforcing tube 8. The third reinforcing tube 8 can effectively increase the cross-sectional size of the end of the first connecting tube 2, thereby improving the structural strength of the end of the first connecting tube 2. At the same time, the third reinforcing tube 8 can be connected to the outer wall of the second connecting tube 5 and the foundation 1 respectively. On the basis that the first connecting tube 2 has been stably connected to the second connecting tube 5 through the second reinforcing tube 7 and the reinforcing connector 6, the third reinforcing tube 8 can further achieve a stable connection between the first connecting tube 2 and the foundation 1, thereby further improving the reinforcement effect of the foundation 1.

[0072] Optionally, after drilling a hole on the foundation 1 to be reinforced to form a mounting hole 11 that passes through the foundation 1 and penetrates the foundation, and before hoisting the first connecting pipe 2 of the micro-pipe pile reinforcement device to above the mounting hole 11, the in-situ reinforcement method of the transmission line tower foundation also includes: forming protrusions and / or grooves on the inner wall of the mounting hole 11, wherein the protrusions and / or grooves are distributed in a spiral shape around the axial direction of the mounting hole 11.

[0073] Specifically, there may be a plurality of protrusions and grooves, and the plurality of protrusions and grooves may be distributed at intervals along a spiral shape around the axial direction of the mounting hole 11 , or the protrusions and grooves may be arranged as a structure extending along a spiral shape.

[0074] In this optional embodiment, a protrusion is formed on the inner wall of the mounting hole 11. In this arrangement, after the reinforcing material is poured into the mounting hole 11 and solidified to form the first reinforcing tube 3, the first reinforcing tube 3 can engage with the protrusion, thereby effectively improving the mutual friction between the first reinforcing tube 3 and the inner wall of the mounting hole 11, thereby ensuring the bearing effect of the first connecting tube 2 on the pull-out load through the first reinforcing tube 3, thereby strengthening the foundation 1; on this basis, the protrusion is distributed in a spiral shape around the axial direction of the mounting hole 11. In this arrangement, after the first reinforcing tube 3 is solidified, a torsional force can be formed between the protrusion, and the component of the torsional force in the vertical direction is downward, thereby further improving the bearing effect of the first connecting tube 2 on the pull-out load through the first reinforcing tube 3.

[0075] In this optional embodiment or other optional embodiments of the present invention, grooves may be further provided on the inner wall of the mounting hole 11 , and the grooves may also be distributed in a spiral shape around the axial direction of the mounting hole 11 .

[0076] In a second aspect, an embodiment of the present invention provides a micro-pipe pile reinforcement device, which is applied to the above-mentioned in-situ reinforcement method of the transmission line tower foundation. The micro-pipe pile reinforcement device includes a first connecting pipe 2, a first reinforcement tube 3 and a reinforcement column 4.

[0077] like Figure 4 and Figure 5 As shown, the technical effect of the micro-pipe pile reinforcement device in this embodiment is the same as the technical effect of the above-mentioned in-situ reinforcement method of the transmission line tower foundation, which will not be repeated here.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An in-situ reinforcement method for a transmission line tower foundation, characterized in that: The following steps are involved: A hole is drilled on the foundation (1) to be reinforced to form a mounting hole (11) that passes through the foundation (1) and penetrates into the foundation; Hoisting a first connecting pipe (2) of the micro-pipe pile reinforcement device to the top of the installation hole (11), and moving the first connecting pipe (2) into the installation hole (11); Casting a reinforcing material between the outer wall of the first connecting pipe (2) and the hole wall of the mounting hole (11), and solidifying the material to form a first reinforcing tube (3) respectively connected to the outer wall of the first connecting pipe (2) and the hole wall of the mounting hole (11); pouring the reinforcing material into the first connecting pipe (2), and solidifying it to form a reinforcing column (4) connected to the inner wall of the first connecting pipe (2); The first connecting pipe (2) and the foundation (1) are fixedly connected.

2. The in-situ reinforcement method for a transmission line tower foundation according to claim 1, characterized in that: The step of drilling a hole on the foundation (1) to be reinforced to form a mounting hole (11) that penetrates the foundation (1) and penetrates the foundation specifically comprises: Obtaining the position and number of the mounting holes (11) to be drilled, wherein there are a plurality of the mounting holes (11), and the plurality of the mounting holes (11) are evenly spaced around the central axis of the foundation (1); Obtaining a preset hole diameter and a preset hole depth of the mounting hole (11); Holes are opened on the foundation (1) according to the positions, number and preset hole diameters of the mounting holes (11), and the mounting holes (11) are formed by drilling according to the preset hole depths.

3. The in-situ reinforcement method for the transmission line tower foundation according to claim 2, characterized in that: The outer diameter of the first connecting pipe (2) is 90 mm-120 mm, the preset hole diameter is 180 mm-240 mm, and the preset hole depth is 6 m-10 m.

4. The in-situ reinforcement method for the transmission line tower foundation according to claim 2, characterized in that: The method of drilling the mounting hole (11) according to the preset hole depth specifically comprises: drilling a hole with preset parameters and the preset hole depth by a drill rod to form the mounting hole (11), wherein the preset parameters include center offset and verticality, the center offset is less than 20 mm, and the verticality is less than or equal to 1%.

5. The in-situ reinforcement method for the transmission line tower foundation according to claim 2, characterized in that: The first connecting pipe (2) comprises a flange and a segmented pipe, the segmented pipe is provided in plurality, and the plurality of segmented pipes are coaxially connected via the flange. Before the first connecting pipe (2) of the micro-pipe pile reinforcement device is hoisted to the top of the mounting hole (11), the in-situ reinforcement method for the power transmission line tower foundation further comprises: Obtaining a preset length of the first connecting pipe (2) according to the preset hole depth; Determining the number of the segmented pipes and the flanges according to the preset length of the first connecting pipe (2); The segmented pipes are coaxially connected in pairs via the flanges to obtain the first connecting pipe (2) having a length equal to the preset length.

6. The in-situ reinforcement method for a transmission line tower foundation according to claim 1, characterized in that: The micro-pipe pile reinforcement device further comprises a second connecting pipe (5) and a reinforcing connecting piece (6). Before the first connecting pipe (2) of the micro-pipe pile reinforcement device is hoisted above the mounting hole (11), the in-situ reinforcement method for the transmission line tower foundation further comprises: The second connecting tube (5) is sleeved on the outer side of one end of the first connecting tube (2) and is coaxially arranged with the first connecting tube (2), so that after the first connecting tube (2) passes through the mounting hole (11), the second connecting tube (5) abuts against the edge of the mounting hole (11); The reinforcing connecting member (6) is placed between the inner wall of the second connecting tube (5) and the outer wall of the first connecting tube (2), and is fixedly connected to the inner wall of the second connecting tube (5) and the outer wall of the first connecting tube (2), respectively.

7. The in-situ reinforcement method for the transmission line tower foundation according to claim 6, characterized in that: The fixed connection between the first connecting pipe (2) and the foundation (1) specifically comprises: After the second connecting tube (5) abuts against the edge of the mounting hole (11), the reinforcing material is poured between the inner wall of the second connecting tube (5) and the outer wall of the first connecting tube (2), and solidified to form a second reinforcing tube (7) respectively connected to the inner wall of the second connecting tube (5), the outer wall of the first connecting tube (2) and the foundation (1).

8. The in-situ reinforcement method for the transmission line tower foundation according to claim 7, characterized in that: The fixed connection between the first connecting pipe (2) and the foundation (1) specifically includes: After the second connecting pipe (5) abuts against the edge of the mounting hole (11), the reinforcing material is poured on the outside of the second connecting pipe (5) and solidified to form a third reinforcing tube (8) connected to the outer wall of the second connecting pipe (5) and the foundation (1) respectively.

9. The in-situ reinforcement method for a transmission line tower foundation according to claim 1, characterized in that: After drilling a hole on the foundation (1) to be reinforced to form an installation hole (11) that penetrates the foundation (1) and penetrates the ground, and before hoisting the first connecting pipe (2) of the micro-pipe pile reinforcement device to the top of the installation hole (11), the in-situ reinforcement method for the power transmission line tower foundation further comprises: Protrusions and / or grooves are formed on the inner wall of the mounting hole (11), wherein the protrusions and / or the grooves are distributed in a spiral shape around the axial direction of the mounting hole (11).

10. A micro-pipe pile reinforcement device, characterized in that: An in-situ reinforcement method for a power transmission line tower foundation as claimed in any one of claims 1 to 9, wherein the micro-pipe pile reinforcement device comprises a first connecting pipe (2), a first reinforcement tube (3) and a reinforcement column (4).

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