Transmission line assembled micro-pile foundation and construction method

Abstract

The embodiment of the application relates to the technical field of micro pile foundation engineering, and particularly relates to a power transmission line assembled micro pile foundation and a construction method. A specific embodiment of the power transmission line assembled micro pile foundation comprises a middle bearing platform, a first edge bearing platform, a second edge bearing platform, prestressed tendons, an anchorage assembly, an anchor pad assembly, a first micro pile, a second micro pile, a third micro pile, a fourth micro pile, a first connecting steel cylinder, a second connecting steel cylinder, a third connecting steel cylinder, a fourth connecting steel cylinder, a first connecting steel plate, a second connecting steel plate, a third connecting steel plate and a fourth connecting steel plate, wherein the middle bearing platform is fixedly connected with the first edge bearing platform through the prestressed tendons; and the middle bearing platform is fixedly connected with the second edge bearing platform through the prestressed tendons. The embodiment improves the transportation and installation efficiency of the assembled micro pile foundation.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of micro pile foundation engineering, in particular to a power transmission line assembled micro pile foundation and a computer device. BACKGROUND

[0002] Cast-in-place pile foundation is a commonly used pile foundation form. Its main technical features include on-site pouring, more wet work, concrete and steel materials, cast-in-place connection, high ultimate bearing capacity and foundation stiffness. The new assembled micro pile foundation has significant differences in construction method, material, connection method, load transmission, construction efficiency, adaptability, bearing performance and economy, etc. Especially its full mechanized construction and the design of prefabricated component size make it have obvious advantages in the application under complex environment.

[0003] However, in practice, it is found that when cast-in-place pile foundations and the above-mentioned assembled micro pile foundations are used, the following technical problems often exist:

[0004] First, although the assembled foundation has been applied, the prefabricated component is large in size, and transportation and installation are difficult;

[0005] Second, the connection structure of the existing pile cap and pile is mostly biased towards pre-buried bolts in concrete and on-site post-pouring, among which the pre-buried bolts have the problems of difficult positioning and easy deviation, and the on-site post-pouring process is a field wet work, which is not conducive to short construction period and environmental protection;

[0006] Third, the construction period of the cast-in-place micro pile foundation is long, and the field process is complex (for example, during the whole construction process of the cast-in-place pile foundation, additional steel reinforcement cage binding, concrete and steel reinforcement transportation, concrete pouring and concrete curing are required);

[0007] Fourth, due to the small diameter of the micro pile, the on-site construction quality control is difficult, and is easily affected by the construction environment and the level of the operator, resulting in unstable pile quality;

[0008] Fifth, the on-site construction of the cast-in-place pile foundation will produce a large amount of slurry and other garbage, causing environmental pollution. SUMMARY

[0009] The summary section of the present application is used to introduce the concepts in a brief form, which will be described in detail in the specific embodiments section. The summary section of the present application is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to be used to limit the scope of the claimed technical solutions.

[0010] Some embodiments of the present application propose a power transmission line assembled micro pile foundation and a construction method to solve one or more of the technical problems mentioned in the background section.

[0011] In a first aspect, some embodiments of the present application provide a transmission line assembled micro pile foundation, comprising: a middle platform, a first edge platform, a second edge platform, a prestressed tendon, an anchor assembly, an anchor pad assembly, a first micro pile, a second micro pile, a third micro pile, a fourth micro pile, a first connecting steel cylinder, a second connecting steel cylinder, a third connecting steel cylinder, a fourth connecting steel cylinder, a first connecting steel plate, a second connecting steel plate, a third connecting steel plate, and a fourth connecting steel plate, wherein the middle platform is fixedly connected with the first edge platform through the prestressed tendon; the middle platform is fixedly connected with the second edge platform through the prestressed tendon; the prestressed tendon is fixedly connected with the first edge platform through the anchor assembly and the anchor pad assembly; the prestressed tendon is fixedly connected with the second edge platform through the anchor assembly and the anchor pad assembly; the first edge platform is fixedly connected with the first micro pile through the first connecting steel cylinder and the first connecting steel plate; the first edge platform is fixedly connected with the second micro pile through the second connecting steel cylinder and the second connecting steel plate; the second edge platform is fixedly connected with the third micro pile through the third connecting steel cylinder and the third connecting steel plate; and the second edge platform is fixedly connected with the fourth micro pile through the fourth connecting steel cylinder and the fourth connecting steel plate.

[0012] Optionally, the middle platform comprises a main column, a middle platform prestressed tendon pipe, a first key groove, and a second key groove, wherein the main column is pre-buried with a connecting bolt; the main column is fixedly connected with a foot plate through the connecting bolt; the middle platform prestressed tendon pipe is used for pipe penetration of the prestressed tendon; the first key groove is used for fixing the first edge platform; and the second key groove is used for fixing the second edge platform.

[0013] Optionally, the first edge platform comprises a first pile installation reserved hole, a second pile installation reserved hole, a first edge platform prestressed tendon pipe, and a first shear key, wherein the first pile installation reserved hole is used for installing the first micro pile, the diameter of the first pile installation reserved hole is greater than the diameter of the first micro pile, and the gap between the first pile installation reserved hole and the first micro pile is connected by grouting; the second pile installation reserved hole is used for installing the second micro pile, the diameter of the second pile installation reserved hole is greater than the diameter of the second micro pile, and the gap between the second pile installation reserved hole and the second micro pile is connected by grouting; the first edge platform prestressed tendon pipe is used for pipe penetration of the prestressed tendon; and the first edge platform is fixedly installed on the first key groove of the middle platform through the first shear key.

[0014] Optionally, the second edge bearing platform comprises: a third pile installation reserved hole, a fourth pile installation reserved hole, a second edge bearing platform prestressed pipe and a second shear key, wherein the third pile installation reserved hole is used for installing a third micro pile, the diameter of the third pile installation reserved hole is larger than the diameter of the third micro pile, and the gap between the third pile installation reserved hole and the third micro pile is connected by grouting; the fourth pile installation reserved hole is used for installing a fourth micro pile, the diameter of the fourth pile installation reserved hole is larger than the diameter of the fourth micro pile, and the gap between the fourth pile installation reserved hole and the fourth micro pile is connected by grouting; the second edge bearing platform prestressed pipe is used for the pipe penetration of prestressed reinforcement; and the second edge bearing platform is fixedly installed on the second key groove included in the intermediate bearing platform through the second shear key.

[0015] Optionally, the first connecting steel cylinder comprises: a first connecting steel cylinder upper flange plate, a first connecting steel cylinder lower flange plate, a first connecting steel cylinder web plate, a first bolt and a first anchoring steel bar, wherein the first connecting steel cylinder web plate is used for providing a first pile installation reserved hole; the first bolt is double-sided welded with the first connecting steel cylinder web plate; the first bolt is plug-welded with the first connecting steel cylinder upper flange plate; the first bolt is plug-welded with the first connecting steel cylinder lower flange plate; the first anchoring steel bar is used for pre-burying the first connecting steel cylinder in the first edge bearing platform; the first connecting steel cylinder upper flange plate is used for providing a flat construction platform during the connection of the first connecting steel plate, and providing the lateral stiffness and strength of the first connecting steel cylinder; and the first connecting steel cylinder lower flange plate is used for providing the lateral stiffness and strength of the first connecting steel cylinder.

[0016] Optionally, the first micro pile comprises: a first micro pile pre-buried bolt and a first pile end head, wherein the first micro pile is fixedly connected with the first connecting steel plate through the first micro pile pre-buried bolt included in the first micro pile; the first pile end head comprises: a first pile head pre-buried bolt anchor bar and a bottom end head; and the first micro pile pre-buried bolt is fixed in the first micro pile through the first pile head pre-buried bolt anchor bar included in the first pile end head.

[0017] In a second aspect, some embodiments of the present application also provide a construction method for a power transmission line assembled micro-pile foundation, the method comprising: positioning a foundation construction site to obtain a positioning point; brushing glue on a splicing surface of an intermediate cap and a first edge cap; brushing glue on a splicing surface of the intermediate cap and a second edge cap; leveling a site of a construction site; thinly coating a layer of grouting material on a surface of the leveled site; in response to determining that the grouting material is not dry, using a small pile crane to hoist the intermediate cap, the first edge cap and the second edge cap to the positioning point, so that a first shear key included in the first edge cap is in reliable contact with a first key groove of the intermediate cap, and a second shear key included in the second edge cap is in reliable contact with a second key groove of the intermediate cap; passing a prestressed tendon from a first edge cap prestressed pipe included in the first edge cap, through the intermediate cap, and out of a second edge cap prestressed pipe included in the second edge cap; applying prestress to the prestressed tendon by a prestress pump; anchoring the prestressed tendon by an anchor assembly and an anchor pad assembly; installing a first micro-pile in the first edge cap; installing a second micro-pile in the first edge cap; installing a third micro-pile in the second edge cap; and installing a fourth micro-pile in the second edge cap.

[0018] The above various embodiments of the present application have the following beneficial effects: the power transmission line assembled micro pile foundation of some embodiments of the present application can improve the transportation and installation efficiency of the assembled micro pile foundation. Specifically, the reason for the low efficiency of the transportation and installation of the assembled micro pile foundation is that the prefabricated components are large in size and difficult to transport and install, although the assembled foundation has been applied. Based on this, the power transmission line assembled micro pile foundation of some embodiments of the present application comprises: a middle pile cap, a first edge pile cap, a second edge pile cap, a prestressed tendon, an anchor assembly, an anchor pad assembly, a first micro pile, a second micro pile, a third micro pile, a fourth micro pile, a first connecting steel cylinder, a second connecting steel cylinder, a third connecting steel cylinder, a fourth connecting steel cylinder, a first connecting steel plate, a second connecting steel plate, a third connecting steel plate, and a fourth connecting steel plate. Thus, some power transmission line assembled micro pile foundations of the present application can be fully mechanically connected without on-site wet work, significantly shortening the construction period and improving the construction efficiency. The prefabricated components are produced in a factory, and the quality control is more strict and reliable, avoiding the uncertainty of on-site construction and ensuring the pile quality. The positions of the bolts and the pile holes of the prefabricated products are more accurate, and the product quality is high. Without on-site wet work, the environmental pollution during construction is significantly reduced, which is beneficial to environmental protection requirements. Small design and light construction tools are adopted, which improves the safety of construction, especially in complex environmental conditions such as narrow space, slope, and mountainous area. The small and block design of the foundation components facilitates transportation and on-site installation, and adapts to the development trend of fully mechanized construction of power transmission line projects. The assembled micro pile foundation has good bearing performance under vertical and horizontal load conditions, the load transmission path is clear, the stress distribution is reasonable, and has strong adaptability and structural stability. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other features, advantages, and aspects of embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, same or similar reference numerals are used to represent same or similar elements. It should be understood that the drawings are schematic, and elements and elements are not necessarily drawn to scale.

[0020] Figure 1 is a structural schematic diagram of some embodiments of the power transmission line assembled micro pile foundation according to the present application;

[0021] Figure 2 is a front view of some embodiments of the power transmission line assembled micro pile foundation according to the present application;

[0022] Figure 3 is a side view of some embodiments of the power transmission line assembled micro pile foundation according to the present application;

[0023] Figure 4is a structural schematic view of a middle cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0024] Figure 5 is a front view of a middle cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0025] Figure 6 is a side view of a middle cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0026] Figure 7 is a structural schematic view of a first edge cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0027] Figure 8 is a front view of a first edge cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0028] Figure 9 is a side view of a first edge cap of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0029] Figure 10 is a structural schematic view of a first connecting steel cylinder of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0030] Figure 11 is a top view of a first connecting steel cylinder of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0031] Figure 12 is a sectional view of a first connecting steel cylinder of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0032] Figure 13 is a structural schematic view of a first micro-pile of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0033] Figure 14 is a structural schematic view of an anchor bar for a first micro-pile pre-buried bolt of a first micro-pile of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0034] Figure 15 is a structural schematic view of a bottom end of a first micro-pile of some embodiments of the assembled micro-pile foundation for power transmission lines according to the present application;

[0035] Figure 16 is a flow chart of some embodiments of a construction method for the assembled micro-pile foundation for power transmission lines according to the present application.

[0036] In the figure, the middle bearing platform 1, the main column 1.1, the middle bearing platform prestressed pipe 1.2, the first keyway 1.3, the second keyway 1.4; the first edge bearing platform 2, the first pile installation reserved hole 2.1, the first edge bearing platform prestressed pipe 2.2, the first shear key 2.3; the first connecting steel cylinder 3, the first connecting steel cylinder upper flange plate 3.1, the first connecting steel cylinder lower flange plate 3.2, the first connecting steel cylinder web plate 3.3, the first bolt 3.4, the first anchoring steel bar 3.5; the first micro pile 4, the first micro pile embedded bolt 4.1, the first pile end 4.2, the first embedded bolt anchoring steel bar 4.1.1, the pointed bottom end 4.2.1, the flat bottom end 4.2.2, the cross-shaped end 4.2.3; the prestressed tendon 5; the anchorage assembly 6; the anchor pad assembly 7; the first connecting steel plate 8; the second edge bearing platform 9; the second micro pile 10; the third micro pile 11; the fourth micro pile 12; the second connecting steel cylinder 13; the third connecting steel cylinder 14; the fourth connecting steel cylinder 15; the second connecting steel plate 16; the third connecting steel plate 17; the fourth connecting steel plate 18. DETAILED DESCRIPTION

[0037] Embodiments of the present application will be described in more detail with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thoroughly and completely understood. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of the present application.

[0038] It should also be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0039] It should be noted that the terms "first", "second" and the like in the present application are only used to distinguish different devices, modules or units, and do not limit the order or interdependence of the functions performed by these devices, modules or units.

[0040] It should be noted that the modification of "one" or "multiple" in the present application is illustrative but not restrictive, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0041] The names of the messages or information exchanged between the devices in the embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of the messages or information.

[0042] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] Figure 1 Structural diagrams of some embodiments of the transmission line assembled micropile foundation according to the present application are shown. As Figure 1 shown, the transmission line assembled micropile foundation includes: a middle pile cap 1, a first edge pile cap 2, a second edge pile cap 9, a prestressed tendon 5, an anchor assembly 6, an anchor pad assembly 7, a first micropile 4, a second micropile 10, a third micropile 11, a fourth micropile 12, a first connecting steel cylinder 3, a second connecting steel cylinder 13, a third connecting steel cylinder 14, a fourth connecting steel cylinder 15, a first connecting steel plate 8, a second connecting steel plate 16, a third connecting steel plate 17, and a fourth connecting steel plate 18. Wherein, the middle pile cap 1 and the first edge pile cap 2 can be fixedly connected through the prestressed tendon 5.

[0044] Specifically, reference can be made to Figures 2-3 The transmission line assembled micropile foundation is further described. Figure 2 Front views of some embodiments of the transmission line assembled micropile foundation according to the present application are shown. Figure 3 Side views of some embodiments of the transmission line assembled micropile foundation according to the present application are shown. As Figures 1-3 shown, the middle pile cap 1 and the second edge pile cap 9 are fixedly connected through the prestressed tendon 5.

[0045] The prestressed tendon 5 and the first edge pile cap 2 can be fixedly connected through the anchor assembly 6 and the anchor pad assembly 7.

[0046] The prestressed tendon 5 and the second edge pile cap 2 can be fixedly connected through the anchor assembly 6 and the anchor pad assembly 7.

[0047] The first edge pile cap 2 and the first micropile 4 can be fixedly connected through the first connecting steel cylinder 3 and the first connecting steel plate 8.

[0048] The first edge pile cap 2 and the second micropile 10 can be fixedly connected through the second connecting steel cylinder 13 and the second connecting steel plate 16.

[0049] The second edge pile cap 9 and the third micropile 11 can be fixedly connected through the third connecting steel cylinder 14 and the third connecting steel plate 17.

[0050] The second edge pile cap 9 and the fourth micropile 12 can be fixedly connected through the fourth connecting steel cylinder 15 and the fourth connecting steel plate 18.

[0051] Therefore, the application provides a new type of assembled micro pile foundation, the foundation connection mode is all mechanical connection, the construction of the micro pile adopts the static pile construction process, and there is no field wet operation. The bearing platform is designed to be small and equal in weight, so that transportation and on-site installation are facilitated. The mechanical connection mode of the prestressed tendon and the bolt is used for splicing, so that the construction quality and efficiency are improved.

[0052] Optionally, reference can be made to Figures 4-6 The intermediate bearing platform 1 included in the power transmission line assembled micro pile foundation is further described. Figure 4 A structural schematic diagram of the intermediate bearing platform 1 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. Figure 5 A front view of the intermediate bearing platform 1 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. Figure 6 A side view of the intermediate bearing platform 1 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. As Figures 4-6 shown, the intermediate bearing platform 1 can include a main column 1.1, an intermediate bearing platform prestressed pipe 1.2, a first key groove 1.3 and a second key groove 1.4, wherein a connecting bolt is pre-buried in the main column 1.1. The main column 1.1 can be fixedly connected with a foot plate through the connecting bolt. The intermediate bearing platform prestressed pipe 1.2 can be used for pipe penetration of the prestressed tendon 5. The first key groove 1.3 can be used for fixing the first edge bearing platform 2. The second key groove 1.4 can be used for fixing the second edge bearing platform 9. Here, the connecting bolt can be a bolt for connecting the foot plate. The foot plate can be a foot plate of a scaffold for high-altitude operation.

[0053] Optionally, reference can be made to Figures 7-9 The first edge bearing platform 2 included in the power transmission line assembled micro pile foundation is further described. Figure 7 A structural schematic diagram of the first edge bearing platform 2 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. Figure 8 A front view of the first edge bearing platform 2 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. Figure 9 A side view of the first edge bearing platform 2 of some embodiments of the power transmission line assembled micro pile foundation according to the application is shown. As Figures 7-9As shown, the first edge bearing platform 2 can include a first pile installation reserved hole 2.1, a second pile installation reserved hole 2.4, a first edge bearing platform prestressed pipe 2.2, and a first shear key 2.3. The first pile installation reserved hole 2.1 can be used to install the first micro pile 4. The diameter of the first pile installation reserved hole 2.1 can be greater than the diameter of the first micro pile 4, and the gap between the first pile installation reserved hole 2.1 and the first micro pile 4 can be connected by grouting. The second pile installation reserved hole 2.4 can be used to install the second micro pile 10. The diameter of the second pile installation reserved hole 2.4 can be greater than the diameter of the second micro pile 10, and the gap between the second pile installation reserved hole 2.4 and the second micro pile 10 can be connected by grouting. The first edge bearing platform prestressed pipe 2.2 can be used for pipe penetration of the prestressed tendon 5. The first edge bearing platform 2 can be fixedly installed on the first key groove 1.3 included in the intermediate bearing platform 1 through the first shear key 2.3.

[0054] Optionally, the second edge bearing platform 9 can include a third pile installation reserved hole 9.1, a fourth pile installation reserved hole 9.4, a second edge bearing platform prestressed pipe 9.2, and a second shear key 9.3. The third pile installation reserved hole 9.1 can be used to install the third micro pile 11. The diameter of the third pile installation reserved hole 9.1 can be greater than the diameter of the third micro pile 11, and the gap between the third pile installation reserved hole 9.1 and the third micro pile 11 can be connected by grouting. The fourth pile installation reserved hole 9.4 can be used to install the fourth micro pile 12. The diameter of the fourth pile installation reserved hole 9.4 can be greater than the diameter of the fourth micro pile 12, and the gap between the fourth pile installation reserved hole 9.4 and the fourth micro pile 12 can be connected by grouting. The second edge bearing platform prestressed pipe 9.2 can be used for pipe penetration of the prestressed tendon 5. The second edge bearing platform 9 can be fixedly installed on the second key groove 1.4 included in the intermediate bearing platform 1 through the second shear key 9.3. Here, the specific structure of the second edge bearing platform 9 and the technical effects brought by it can refer to the first edge bearing platform 2 in the above-mentioned embodiments, which will not be described here.

[0055] Optionally, it can be referred to Figures 10-12 The first connecting steel cylinder 3 included in the power transmission line assembled micro pile foundation is further described. Figure 10 A structural schematic diagram of the first connecting steel cylinder 3 of some embodiments of the power transmission line assembled micro pile foundation according to the present application is shown. Figure 11 A top view of the first connecting steel cylinder 3 of some embodiments of the power transmission line assembled micro pile foundation according to the present application is shown. Figure 12A cross-sectional view of the first connecting steel cylinder 3 of some embodiments of the transmission line fabricated micro-pile foundation according to the present application is shown. As shown Figures 10-12 The first connecting steel cylinder 3 can include a first connecting steel cylinder upper flange plate 3.1, a first connecting steel cylinder lower flange plate 3.2, a first connecting steel cylinder web plate 3.3, a first bolt 3.4, and a first anchoring steel bar 3.5. The first connecting steel cylinder web plate 3.3 can be used to provide the first pile installation reserved hole 2.1. The first bolt 3.4 and the first connecting steel cylinder web plate 3.3 can be double-face welded. The first bolt 3.4 and the first connecting steel cylinder upper flange plate 3.1 can be plug-welded. The first bolt 3.4 and the first connecting steel cylinder lower flange plate 3.2 can be plug-welded. The first anchoring steel bar 3.5 can be used to pre-bury the first connecting steel cylinder 3 in the first edge beam 2. The first connecting steel cylinder upper flange plate 3.1 can be used to provide a flat construction platform when connecting the first connecting steel plate 8, and to provide the lateral stiffness and strength of the first connecting steel cylinder 3. The first connecting steel cylinder lower flange plate 3.2 can be used to provide the lateral stiffness and strength of the first connecting steel cylinder 3.

[0056] Specifically, the specific structure of the second connecting steel cylinder 13 and the technical effects brought by it can be referred to the first connecting steel cylinder 3 in the above embodiments, the specific structure of the third connecting steel cylinder 14 and the technical effects brought by it can be referred to the first connecting steel cylinder 3 in the above embodiments, and the specific structure of the fourth connecting steel cylinder 15 and the technical effects brought by it can be referred to the first connecting steel cylinder 3 in the above embodiments, which will not be described here again.

[0057] Thus, the connecting steel cylinder designed by the present application has a height consistent with the thickness of the beam, and is simple in structure and easy to manufacture. Meanwhile, when the beam is prefabricated, it can act as a formwork and a force connecting piece between the beam and the pile, and is convenient to position.

[0058] Alternatively, the first connecting steel cylinder 3 can be designed as shown in Figures 13-15 The first micro-pile 4 included in the transmission line fabricated micro-pile foundation is further described. Figure 13 A structural schematic view of the first micro-pile 4 of some embodiments of the transmission line fabricated micro-pile foundation according to the present application is shown.

[0059] Figure 14 A structural schematic view of the first micro-pile pre-burying bolt anchoring steel bar 4.1.1 of some embodiments of the transmission line fabricated micro-pile foundation according to the present application is shown. Figure 15 A structural schematic view of the bottom end of the first micro-pile 4 of some embodiments of the transmission line fabricated micro-pile foundation according to the present application is shown. As shown Figures 13-15As shown, the first micro pile 4 can include a first micro pile embedded bolt 4.1 and a first pile end 4.2. Wherein the first micro pile 4 can be fixedly connected with the first connecting steel plate 8 through the first micro pile embedded bolt 4.1 included in the first micro pile 4. The first pile end 4.2 can include a first pile head embedded bolt anchor 4.1.1 and a bottom end. The first micro pile embedded bolt 4.1 is fixed in the first micro pile 4 through the first pile head embedded bolt anchor 4.1.1 included in the first pile end 4.2. Here, the bottom end can be, but is not limited to, at least one of the following: a sharp bottom end 4.2.1, a flat bottom end 4.2.2 or a cross-shaped end 4.2.3.

[0060] Specifically, the sharp bottom end 4.2.1 can reduce the resistance of the micro pile in the soil, and is mainly used for pile pressing in hard soil or soil containing stones. The flat bottom end 4.2.2 is suitable for pile pressing in soft soil and medium-hard soil. The cross-shaped end 4.2.3 can reduce the pile pressing resistance and also improve the pile end bearing capacity.

[0061] Here, the specific structure of the second micro pile 10 and the technical effects brought by it can refer to the first micro pile 4 in the above embodiment, the specific structure of the third micro pile 11 and the technical effects brought by it can refer to the first micro pile 4 in the above embodiment, and the specific structure of the fourth micro pile 12 and the technical effects brought by it can refer to the first micro pile 4 in the above embodiment, which will not be repeated here.

[0062] The above various embodiments of the present application have the following beneficial effects: the power transmission line assembled micro pile foundation of some embodiments of the present application can improve the efficiency of transportation and installation of the assembled micro pile foundation. Specifically, the reason for the low efficiency of transportation and installation of the assembled micro pile foundation is that the prefabricated components are large in size and difficult to transport and install, although the assembled foundation has been applied. Based on this, the power transmission line assembled micro pile foundation of some embodiments of the present application comprises: a middle pile cap, a first edge pile cap, a second edge pile cap, a prestressed tendon, an anchor assembly, an anchor pad assembly, a first micro pile, a second micro pile, a third micro pile, a fourth micro pile, a first connecting steel cylinder, a second connecting steel cylinder, a third connecting steel cylinder, a fourth connecting steel cylinder, a first connecting steel plate, a second connecting steel plate, a third connecting steel plate, and a fourth connecting steel plate. Thus, some power transmission line assembled micro pile foundations of the present application can be fully mechanically connected without on-site wet work, significantly shortening the construction period and improving the construction efficiency. The prefabricated components are produced in a factory, and the quality control is more strict and reliable, avoiding the uncertainty of on-site construction and ensuring the pile quality. The positions of the bolts and pile holes of the prefabricated products are more accurate, and the product quality is high. There is no need for on-site wet work, which significantly reduces the environmental pollution during construction and is beneficial to environmental protection requirements. Small design and light construction tools are used to improve the safety of construction, especially in complex environmental conditions such as narrow space, slope, and mountainous area. The small and block design of the foundation components facilitates transportation and on-site installation, adapting to the development trend of fully mechanized construction of power transmission line projects. The assembled micro pile foundation has good bearing capacity under vertical and horizontal load conditions, the load transmission path is clear, the stress distribution is reasonable, and it has strong adaptability and structural stability.

[0063] Figure 16 A flowchart 1600 of some embodiments of a construction method for a power transmission line assembled micro pile foundation according to the present application is shown. As shown, the construction method for the power transmission line assembled micro pile foundation is applied to some embodiments of the above-mentioned power transmission line assembled micro pile foundation, and comprises: Figure 16

[0064] Step 1601, positioning the foundation construction position to obtain a positioning point.

[0065] In some embodiments, the execution subject of the construction method for the power transmission line assembled micro pile foundation can position the foundation construction position to obtain a positioning point. Wherein, the positioning method can be preset to position the foundation construction position to obtain a positioning point.

[0066] As an example, the above-mentioned preset positioning method can be an engineering survey positioning method.

[0067] Step 1602, brushing glue on the splicing surface of the middle pile cap and the first edge pile cap.​

[0068] In some embodiments, the execution subject can glue the splicing surface of the intermediate deck and the first edge deck. Wherein, the glue can be applied to the splicing surface of the intermediate deck and the first edge deck.

[0069] Step 1603, glue the splicing surface of the intermediate deck and the second edge deck.

[0070] In some embodiments, the execution subject can glue the splicing surface of the intermediate deck and the second edge deck. Wherein, the glue can be applied to the splicing surface of the intermediate deck and the second edge deck.

[0071] Step 1604, level the site of the construction site.

[0072] In some embodiments, the execution subject can level the site of the construction site. Wherein, the site of the construction site can be leveled using a leveling device.

[0073] As an example, the leveling device can be, but is not limited to, at least one of the following: a bulldozer or a grader.

[0074] Step 1605, thinly coat a layer of grouting material on the surface of the leveled site.

[0075] In some embodiments, the execution subject can thinly coat a layer of grouting material on the surface of the leveled site. Wherein, a layer of grouting material can be thinly coated on the surface of the leveled site. In this way, the surface of the site can be leveled and the deck can be in good contact with the ground surface.

[0076] Step 1606, in response to determining that the grouting material is not dry, use a small pile crane to hoist the intermediate deck, the first edge deck and the second edge deck to the positioning point, so that the first shear key included in the first edge deck is in reliable contact with the first key groove of the intermediate deck, and the second shear key included in the second edge deck is in reliable contact with the second key groove of the intermediate deck.

[0077] In some embodiments, the execution subject described above can hoist the intermediate pile cap, the first edge pile cap and the second edge pile cap to the positioning point using a small pile crane in response to determining that the grouting material is not dry, so that the first shear key included in the first edge pile cap is in reliable contact with the first key groove of the intermediate pile cap, and the second shear key included in the second edge pile cap is in reliable contact with the second key groove of the intermediate pile cap. Wherein, the intermediate pile cap, the first edge pile cap and the second edge pile cap can be hoisted to the positioning point using a small pile crane in response to determining that the grouting material is not dry, so that the first shear key included in the first edge pile cap is in reliable contact with the first key groove of the intermediate pile cap, and the second shear key included in the second edge pile cap is in reliable contact with the second key groove of the intermediate pile cap.

[0078] Step 1607, the prestressed tendon is passed into the first edge pile cap prestressed tendon pipe included in the first edge pile cap, through the intermediate pile cap, and out of the second edge pile cap prestressed tendon pipe included in the second edge pile cap.

[0079] In some embodiments, the execution subject described above can pass the prestressed tendon into the first edge pile cap prestressed tendon pipe included in the first edge pile cap, through the intermediate pile cap, and out of the second edge pile cap prestressed tendon pipe included in the second edge pile cap. Wherein, the prestressed tendon can be passed into the first edge pile cap prestressed tendon pipe included in the first edge pile cap, through the intermediate pile cap, and out of the second edge pile cap prestressed tendon pipe included in the second edge pile cap.

[0080] Optionally, the execution subject can also pass the prestressed tendon into the second edge pile cap prestressed tendon pipe included in the second edge pile cap, through the intermediate pile cap, and out of the first edge pile cap prestressed tendon pipe included in the first edge pile cap.

[0081] Step 1608, prestress is applied to the prestressed tendon by a prestress pump.

[0082] In some embodiments, the execution subject described above can apply prestress to the prestressed tendon by a prestress pump. Wherein, the prestress can be applied to the prestressed tendon by a prestress pump.

[0083] Step 1609, the prestressed tendon is anchored by an anchor assembly and an anchor pad assembly.

[0084] In some embodiments, the execution subject described above can anchor the prestressed tendon by an anchor assembly and an anchor pad assembly. Wherein, the prestressed tendon can be anchored by an anchor assembly and an anchor pad assembly.

[0085] Step 1610, the first micro pile is installed in the first edge pile cap.

[0086] In some embodiments, the execution subject can install the first micropile in the first edge cushion. In this case, the first micropile can be a single pile, a two-section pile or a three-section pile according to the pile length, and the type of the first micropile can be a reinforced concrete pile or a steel pipe pile.

[0087] In some optional implementations of some embodiments, the execution subject installs the first micropile in the first edge cushion, which can include the following steps:

[0088] In the first step, the first micropile is jacked in the first pile installation reserved hole included in the first edge cushion. In this case, the jacking frame can be fixed by the screw rod of the first edge cushion to jack in the first pile installation reserved hole. In practice, a small jacking machine can also be directly used to statically jack the first micropile. The jacking method described above also includes hammering pile, and is not limited to static jacking.

[0089] In the second step, the jacking frame is removed in response to determining that the first micropile meets the preset condition. In this case, the preset condition can be that the first micropile is jacked to the target position.

[0090] As an example, the target position can be that the first micropile is flush with the top of the first edge cushion.

[0091] In the third step, the micro-expanding fine stone concrete is filled in the first pile installation reserved hole included in the first edge cushion.

[0092] In the fourth step, the first connecting steel plate is fixedly connected with the first bolt included in the first connecting steel cylinder and the first micropile embedded bolt included in the first micropile. In this case, the screw rod on the top surface of the first edge cushion can be connected with the nut through the corresponding bolt hole on the first connecting steel plate, and the first connecting steel plate and the first micropile embedded bolt in the first micropile are connected and fixed by the nut, so as to realize the connection and fixation of the micropile and the cushion.

[0093] In step 1611, the second micropile is installed in the first edge cushion.

[0094] In some embodiments, the execution subject can install the second micropile in the first edge cushion. In this case, the specific implementation of installing the second micropile in the first edge cushion and the technical effects brought by the specific implementation can be referred to step 1610 in the above embodiments, which will not be described here. The second micropile can be a single pile, a two-section pile or a three-section pile according to the pile length, and the type of the second micropile can be a reinforced concrete pile or a steel pipe pile.

[0095] Step 1612, installing a third micropile in the second edge beam.

[0096] In some embodiments, the execution subject can install a third micropile in the second edge beam. The specific implementation of installing the third micropile in the second edge beam and the technical effects brought by the specific implementation can be referred to step 1610 in the above embodiments, which will not be repeated here. The third micropile can be a single pile, a two-section pile or a three-section pile according to the length of the pile, and the type of the third micropile can be a reinforced concrete pile or a steel pipe pile.

[0097] Step 1613, installing a fourth micropile in the second edge beam.

[0098] In some embodiments, the execution subject can install a fourth micropile in the second edge beam. The specific implementation of installing the fourth micropile in the second edge beam and the technical effects brought by the specific implementation can be referred to step 1610 in the above embodiments, which will not be repeated here. The fourth micropile can be a single pile, a two-section pile or a three-section pile according to the length of the pile, and the type of the fourth micropile can be a reinforced concrete pile or a steel pipe pile.

[0099] Therefore, the construction method and process of the fabricated micropile foundation can adopt full mechanical connection, no field wet work, reduce the construction period, and improve the construction efficiency.

[0100] Each technical feature of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A transmission line fabricated micropile foundation, characterized by, The utility model relates to a kind of prefabricated reinforced concrete composite foundation, including: Intermediate bearing platform, first edge bearing platform, second edge bearing platform, prestressed tendon, anchor assembly, anchor pad assembly, first micro pile, second micro pile, third micro pile, fourth micro pile, first connecting steel cylinder, second connecting steel cylinder, third connecting steel cylinder, fourth connecting steel cylinder, first connecting steel plate, second connecting steel plate, third connecting steel plate and fourth connecting steel plate, wherein, The intermediate bearing platform is fixedly connected with the first edge bearing platform by the prestressed tendon; The intermediate bearing platform is fixedly connected with the second edge bearing platform by the prestressed tendon; The prestressed tendon is fixedly connected with the first edge bearing platform by the anchor assembly and the anchor pad assembly; The prestressed tendon is fixedly connected with the second edge bearing platform by the anchor assembly and the anchor pad assembly; The first edge bearing platform is fixedly connected with the first micro pile by the first connecting steel cylinder and the first connecting steel plate; The first edge bearing platform is fixedly connected with the second micro pile by the second connecting steel cylinder and the second connecting steel plate; The second edge bearing platform is fixedly connected with the third micro pile by the third connecting steel cylinder and the third connecting steel plate; The second edge bearing platform is fixedly connected with the fourth micro pile by the fourth connecting steel cylinder and the fourth connecting steel plate; The first connecting steel cylinder includes a first connecting steel cylinder upper flange plate, a first connecting steel cylinder lower flange plate, a first connecting steel cylinder web, first bolts and first anchoring steel bars, wherein the first connecting steel cylinder upper flange plate is arranged on the top of the first connecting steel cylinder web, and the first connecting steel cylinder lower flange plate is arranged on the bottom of the first connecting steel cylinder web; The first connecting steel cylinder web is used to provide a first pile installation reserved hole; The first bolts are double-sided welded with the sidewall of the first connecting steel cylinder web; The first bolts pass through the first connecting steel cylinder upper flange plate, and the first bolts are plug-welded with the first connecting steel cylinder upper flange plate; The first bolts are plug-welded with the first connecting steel cylinder lower flange plate; The first anchoring steel bars are arranged on the sidewall of the first connecting steel cylinder web, and the first anchoring steel bars are used to embed the first connecting steel cylinder in the first edge bearing platform; The first connecting steel cylinder upper flange plate is used to provide a flat construction platform when the first connecting steel plate is connected, and provide lateral stiffness and strength of the first connecting steel cylinder; The first connecting steel cylinder lower flange plate is used to provide lateral stiffness and strength of the first connecting steel cylinder.

2. The transmission line fabricated micropile foundation according to claim 1, characterized in that, The intermediate bearing platform includes a main column, an intermediate bearing platform prestressed pipe, a first key groove and a second key groove, wherein, The main column is embedded with connecting bolts; The main column is fixedly connected with a foot plate through the connecting bolts; The intermediate bearing platform prestressed pipe is used for pipe penetration of the prestressed tendon; The first key groove is used to fix the first edge bearing platform; The second key groove is used to fix the second edge bearing platform.

3. The transmission line fabricated micropile foundation according to claim 2, characterized in that, The first edge bearing platform includes a first pile installation reserved hole, a second pile installation reserved hole, a first edge bearing platform prestressed pipe and a first shear key, wherein, The first pile installation reserved hole is used for installing the first micro pile, wherein a diameter of the first pile installation reserved hole is greater than a diameter of the first micro pile, and a gap between the first pile installation reserved hole and the first micro pile is densely connected by grouting; The second pile installation reserved hole is used for installing the second micro pile, wherein a diameter of the second pile installation reserved hole is greater than a diameter of the second micro pile, and a gap between the second pile installation reserved hole and the second micro pile is densely connected by grouting; The first edge bearing platform prestressed pipe is used for pipe penetrating of the prestressed tendon; The first edge bearing platform is fixedly installed on the first key groove included in the middle bearing platform through the first shear key.

4. A construction method for a power transmission line assembled micro pile foundation, applied to the power transmission line assembled micro pile foundation according to any one of claims 1-3, comprising: Positioning a foundation construction position to obtain a positioning point; Gluing a splicing surface of the middle bearing platform and the first edge bearing platform; Gluing a splicing surface of the middle bearing platform and the second edge bearing platform; Leveling a site of a construction site; Thinly coating a grouting material on a surface of the leveled site; In response to determining that the grouting material is not dry, hoisting the middle bearing platform, the first edge bearing platform and the second edge bearing platform to the positioning point using a small pile hoisting machine, so that the first shear key included in the first edge bearing platform reliably contacts the first key groove of the middle bearing platform, and the second shear key included in the second edge bearing platform reliably contacts the second key groove of the middle bearing platform; Piercing the prestressed tendon from the first edge bearing platform prestressed pipe included in the first edge bearing platform, through the middle bearing platform, and out of the second edge bearing platform prestressed pipe included in the second edge bearing platform; Applying prestress to the prestressed tendon by a prestress pump; Anchoring the prestressed tendon by an anchor assembly and an anchor pad assembly; Installing the first micro pile in the first edge bearing platform; Installing the second micro pile in the first edge bearing platform; Installing the third micro pile in the second edge bearing platform; Installing the fourth micro pile in the second edge bearing platform.

5. The construction method of the assembled micropile foundation for power transmission line according to claim 4, characterized in that, Installing the first micro pile in the first edge bearing platform, comprising: Piling the first micro pile in the first pile installation reserved hole included in the first edge bearing platform by a pile press; In response to determining that the first micro pile meets a preset condition, removing the pile press; Filling micro-expansive fine aggregate concrete in the first pile installation reserved hole included in the first edge bearing platform; Fixing and connecting the first connecting steel plate with the first bolt included in the first connecting steel cylinder and the first micro pile embedded bolt included in the first micro pile, respectively.

Images