Power transmission line assembly type bearing platform spiral blade steel pipe micro pile foundation and installation method

Abstract

The invention provides a power transmission line assembly type bearing platform spiral blade steel pipe micro pile foundation and an installation method, and belongs to the technical field of power building construction. The assembly type bearing platform spiral blade steel pipe micro pile foundation for the power transmission line comprises a prefabricated bearing platform, a spiral blade steel pipe micro pile foundation, a spiral blade steel pipe micro pile foundation, a spiral blade steel pipe micro pile foundation, a spiral blade steel pipe micro pile foundation and a spiral blade steel pipe micro pile foundation, the connecting rod is used for penetrating through the mounting hole in the first direction and is fixedly connected with the prefabricated bearing platform; the limiting piece is installed on the connecting rod, and the limiting piece is arranged in a bending mode in the first direction and extends in the first direction; wherein a preset included angle is formed between the first direction and the vertical direction, and the preset included angle is an acute angle. Through the arrangement of the prefabricated parts such as the prefabricated bearing platform, the inclined arrangement of the connecting rods and the spiral surrounding arrangement of the limiting parts, the anti-pulling effect of the assembly type bearing platform spiral blade steel pipe micro pile foundation for the power transmission line can be effectively guaranteed while the construction efficiency of the micro pile foundation is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power building construction, and in particular relates to a transmission line assembled cap spiral blade steel pipe micro pile foundation and an installation method. Background Art

[0002] Transmission line angle steel tower is also known as transmission line iron tower, which is a tower-shaped building used for power transmission and belongs to the space truss structure. Transmission line angle steel tower is usually composed of tower body and micro pile foundation, in which the tower body is assembled by connecting the main material of angle steel tower and the diagonal material of angle steel tower to realize the layout of transmission line, and the micro pile foundation is fixed on the ground, and the tower body is fixed on the micro pile foundation to ensure the stability of the tower body.

[0003] At present, referring to the Chinese utility model patent with application number "202320990916.0" and the Chinese utility model patent with application number "201120333641.0", it can be seen that micro pile foundations usually require on-site pouring of concrete piles and caps. However, the pouring construction procedure of micro pile foundations is complicated, and the amount of concrete poured is large, which greatly increases the time required to wait for the concrete to solidify, and the construction period is long, resulting in low construction efficiency of micro pile foundations; at the same time, due to the length and diameter restrictions of concrete piles, the pull-out effect of micro pile foundations is greatly weakened, which leads to high geological requirements for micro pile foundations, greatly limiting the flexibility of transmission line design. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to ensure the anti-pullout effect while improving the construction efficiency of the micropile foundation. In view of the shortcomings of the existing technology, a transmission line assembled foundation spiral blade steel pipe micropile foundation and an installation method are provided.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a transmission line assembled cap spiral blade steel pipe micro pile foundation, comprising:

[0007] A prefabricated foundation, wherein a mounting hole is provided through the prefabricated foundation, and the prefabricated foundation is used to connect the body of the angle steel tower of the power transmission line;

[0008] A connecting rod, the connecting rod is used to pass through the mounting hole along a first direction and is fixedly connected to the prefabricated bearing platform;

[0009] A limiting member, wherein the limiting member is mounted on the connecting rod, the limiting member is bent around the first direction and extends along the first direction;

[0010] Wherein, the first direction is arranged at a preset angle with the vertical direction, and the preset angle is an acute angle.

[0011] Compared with the prior art, the transmission line assembled foundation spiral blade steel pipe micro pile foundation of the present invention has the following beneficial effects: the prefabricated foundation can stably support the main body and ensure the stable installation of the transmission line angle steel tower, wherein the prefabricated foundation is a prefabricated part, which can be manufactured and assembled in the factory and then transported to the installation site of the transmission line angle steel tower without the need for on-site pouring, thus saving construction time and effectively improving the efficiency of the transmission line angle steel tower during installation; on this basis, after the prefabricated foundation is placed in the installation position, the connecting rod can be directly inserted into the installation hole and penetrated into the foundation under the prefabricated foundation to achieve a quick connection between the prefabricated foundation and the foundation, without the need for large-scale concrete pouring, further saving construction time and improving the construction efficiency of the transmission line assembled foundation spiral blade steel pipe micro pile foundation, and when the transmission line angle steel tower is subjected to upward pull-out force, the acting force between the connecting rod and the foundation can offset the upward pull-out force to a certain extent, thereby improving the transmission line assembled foundation spiral blade steel The pull-out resistance of the micro-pile foundation can not only ensure the installation stability of the angle steel tower of the transmission line, but also reduce the requirements of the spiral blade steel pipe micro-pile foundation of the assembled foundation of the transmission line on the soil of the foundation, and improve the flexibility of the transmission line design. In addition, the inclined setting of the connecting rod can further increase the force-bearing area between the spiral blade steel pipe micro-pile foundation of the assembled foundation of the transmission line, improve the bearing capacity, and thus ensure the installation stability of the angle steel tower of the transmission line; at the same time, the limiter can be distributed in a spiral shape along the axial direction of the connecting rod, so that when the connecting rod is rotated to penetrate into the installation hole, the rotational force of the connecting rod can be transmitted to the foundation through the limiter, thereby rotating and cutting the foundation to facilitate the penetration of the connecting rod into the foundation, and after the connecting rod is installed in place, there is a mutual squeezing force between the limiter and the foundation, which can not only improve the tightness of the connection between the connecting rod and the foundation, but also have a component force in the vertical direction that can offset the upward pull-out force, further improving the pull-out resistance of the spiral blade steel pipe micro-pile foundation of the assembled foundation of the transmission line.

[0012] Optionally, the limiting member includes blades and ribs. When the connecting rod passes through the mounting hole, the blades are located on the portion of the connecting rod passing through the mounting hole and are extended spirally around the first direction. The ribs are located on the portion of the connecting rod passing through the mounting hole, and the extension direction of the ribs is cross-set with the first direction.

[0013] Optionally, the connecting rod is a hollow structure filled with reinforcing material, and / or a reinforcing member is provided in the hollow structure, and the reinforcing member is respectively fixedly connected to two inner walls of the connecting rod along a second direction, and the second direction is perpendicular to the first direction.

[0014] Optionally, on a plane perpendicular to the first direction, the blade includes a first end, a second end and a blade body, the first end is connected to the connecting rod and extends away from the connecting rod along the second direction to sequentially form the blade body and the second end; when the connecting rod passes through the mounting hole, the blade body is away from the mounting hole along the first direction relative to the first end and the second end.

[0015] Optionally, the transmission line assembled foundation spiral blade steel pipe micropile foundation also includes a boot plate, a fixing rod and a footrest plate, the footrest plate is installed on the prefabricated foundation, the boot plate is a cross structure, and is fixedly installed on the footrest plate, the boot plate is penetrated by a plurality of through holes, the opening directions of the plurality of through holes are parallel to the horizontal direction, and are cross-arranged with each other, both ends of the fixing rod are fixedly connected to the prefabricated foundation, there are a plurality of fixing rods, and the plurality of fixing rods pass through the plurality of through holes in a one-to-one correspondence.

[0016] Optionally, a stiffening plate is provided on the prefabricated foundation, and there are multiple stiffening plates, which are cross-arranged, and the mounting holes are located between adjacent stiffening plates.

[0017] Optionally, the transmission line assembled foundation spiral blade steel pipe micropile foundation also includes a support plate, which is connected to the end of the connecting rod, and the edge of the mounting hole is recessed to form a groove, and when the connecting rod passes through the mounting hole, the support plate is placed in the groove and abuts against the bottom wall of the groove.

[0018] Optionally, the support plate is penetrated by a strip hole, the strip hole is bent and extended around the first direction, and a connecting hole is provided on the bottom wall of the trough. When the support plate is placed in the trough, the strip hole and the connecting hole are correspondingly connected and are used for passing a fixing part to fix the support plate to the prefabricated support platform.

[0019] In a second aspect, the present invention further provides a method for installing a transmission line assembled cap spiral blade steel pipe micropile foundation, which is used for the transmission line assembled cap spiral blade steel pipe micropile foundation as described above, and the installation method for the transmission line assembled cap spiral blade steel pipe micropile foundation comprises the following steps:

[0020] S1. Complete the preparation of the prefabricated cap of the spiral blade steel pipe micropile foundation of the transmission line assembled cap in the factory and transport it to the installation site;

[0021] S2, hoisting the prefabricated foundation to the installation position of the angle steel tower of the transmission line;

[0022] S3, hoisting the connecting rod of the spiral blade steel pipe micropile foundation of the transmission line assembled foundation to the top of the installation hole of the prefabricated foundation, and inserting the connecting rod into the installation hole until the connecting rod reaches a predetermined position;

[0023] S4, pouring steel slag concrete into the installation hole, and fixing the connecting rod to the prefabricated foundation.

[0024] Compared with the prior art, the beneficial effects of the installation method of the transmission line assembled foundation spiral blade steel pipe micropile foundation of the present invention are similar to the beneficial effects of the transmission line assembled foundation spiral blade steel pipe micropile foundation as described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] Figure 1 : A schematic diagram of a portion of the structure of a transmission line angle steel tower from one perspective in an embodiment of the present invention;

[0027] Figure 2 : A partial structural diagram of a transmission line assembled cap spiral blade steel pipe micro pile foundation from one perspective in an embodiment of the present invention;

[0028] Figure 3 : A schematic diagram of a part of the structure of the angle steel tower of a power transmission line from another perspective in an embodiment of the present invention;

[0029] Figure 4 : A structural schematic diagram of another perspective of the assembled cap spiral blade steel pipe micro pile foundation for power transmission lines in an embodiment of the present invention;

[0030] Figure 5 : A schematic diagram of a process for installing a transmission line assembled cap spiral blade steel pipe micro pile foundation according to an embodiment of the present invention;

[0031] Among them, 1-prefabricated base, 11-installation hole, 12-stiffening plate; 2-connecting rod, 3-limiting member, 31-blade, 311-first end, 312-second end, 313-blade body, 32-rib, 4-boot plate, 41-through hole; 5-fixing rod, 6-foot base plate, 7-support plate, 71-strip hole, 8-connecting hole, 9-body, 91-angle steel tower main material, 92-angle steel tower oblique material. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] First, as Figure 1 As shown, an embodiment of the present invention provides a transmission line assembled foundation spiral blade steel pipe micropile foundation, including: a prefabricated foundation 1, a mounting hole 11 is penetrated on the prefabricated foundation 1, and the prefabricated foundation 1 is used to connect the body 9 of the transmission line angle steel tower; a connecting rod 2, the connecting rod 2 is used to penetrate the mounting hole 11 along a first direction and is fixedly connected to the prefabricated foundation 1; a limit member 3, the limit member 3 is installed on the connecting rod 2, the limit member 3 is bent around the first direction, and extends along the first direction; wherein the first direction is set at a preset angle with the vertical direction, and the preset angle is an acute angle.

[0035] Specifically, Figure 1As shown, the vertical direction is the Z-axis direction, the first direction is shown as the extension direction of the dotted line A, the angle between the vertical direction and the first direction is a, the angle a is an acute angle, the angle value of the angle a is greater than or equal to 15 and less than or equal to 25, for example, the angle value of the angle a is 20, that is, the connecting rod 2 passes through the mounting hole 11 in a direction inclined 20 degrees relative to the vertical direction; the prefabricated cap 1 is a prefabricated part, wherein the mounting hole 11 is a hole-shaped structure reserved in advance during the preparation process of the prefabricated cap 1, and the prefabricated cap 1 can be a concrete structure. For example, the prefabricated cap 1 is a reinforced concrete structure completed by mold casting. Of course, the prefabricated cap 1 can also be a prefabricated steel structure; transmission line The main body 9 of the angle steel tower is composed of an angle steel tower main material 91 and an angle steel tower oblique material 92, wherein the main body 9 can be fixedly installed on the prefabricated foundation 1 by anchor bolts, and can also be installed on the prefabricated foundation 1 by fixed connection methods such as welding anchoring, and the angle value of angle a can be approximately equal to the inclination angle value of the angle steel tower oblique material 92; the connecting rod 2 can be a steel structure, and the cross-sectional shape of the connecting rod 2 can be circular or polygonal, wherein the fixed connection between the connecting rod 2 and the prefabricated foundation 1 can be achieved by welding or the like, or by screwing or the like; the limit member 3 can be a steel structure, and the limit member 3 can be integrally formed with the connecting rod 2, or can be installed on the connecting rod 2 by fixed connection methods such as welding.

[0036] In this optional embodiment, if Figure 1As shown, a prefabricated cap 1 is provided as the supporting foundation of the spiral blade steel pipe micro pile foundation of the entire transmission line assembled cap. The prefabricated cap 1 can be connected to the main body 9 of the transmission line angle steel tower. In this way, the prefabricated cap 1 can stably support the main body 9 to ensure the stable installation of the transmission line angle steel tower. The prefabricated cap 1 is a prefabricated part, which can be manufactured and assembled in the factory and then transported to the installation site of the transmission line angle steel tower without the need for on-site casting, thus saving construction time and effectively improving the efficiency of the transmission line angle steel tower installation. On this basis, the prefabricated cap 1 is pre-perforated with an installation hole 11, and the connecting rod 2 can penetrate the installation hole along the first direction. 11, and the angle between the first direction and the vertical direction is an acute angle, that is, the connecting rod 2 is arranged obliquely. In this way, after the prefabricated cap 1 is placed in the installation position, the connecting rod 2 can be directly inserted into the installation hole 11 and penetrate into the foundation under the prefabricated cap 1, so as to realize the quick connection between the prefabricated cap 1 and the foundation, without the need for large-volume concrete pouring, further saving construction time, and improving the construction efficiency of the transmission line assembled cap spiral blade steel pipe micropile foundation. Moreover, since the connecting rod 2 is arranged obliquely, when it is located inside the foundation, there is a downward force between it and the foundation in the vertical direction. When the angle steel tower of the transmission line is subjected to upward pulling force, the connecting rod 2 The force between the micro pile and the foundation can offset the uplift force to a certain extent, thereby improving the anti-uplift effect of the spiral blade steel pipe micro pile foundation of the assembled foundation of the transmission line, which can not only ensure the installation stability of the angle steel tower of the transmission line, but also reduce the requirements of the spiral blade steel pipe micro pile foundation of the assembled foundation of the transmission line on the foundation geology, and improve the flexibility of the transmission line design. In addition, the inclined setting of the connecting rod 2 can also further increase the force-bearing area between the spiral blade steel pipe micro pile foundations of the assembled foundation of the transmission line, improve the bearing capacity, and thus ensure the installation stability of the angle steel tower of the transmission line; at the same time, a limiter 3 is also provided on the connecting rod 2, and the limiter 3 is arranged around the first direction It is bent and extends along the first direction. With this arrangement, the limit member 3 can be distributed in a spiral shape along the axial direction of the connecting rod 2. In this way, when the connecting rod 2 is rotated to penetrate into the mounting hole 11, the rotational force of the connecting rod 2 can be transmitted to the foundation through the limit member 3, thereby rotating and cutting the foundation to facilitate the connecting rod 2 to penetrate into the foundation. Moreover, after the connecting rod 2 is installed in place, due to the spiral setting of the limit member 3, there is a mutual squeezing force between the limit member 3 and the foundation. The squeezing force can not only improve the tightness of the connection between the connecting rod 2 and the foundation, but also has a component force in the vertical direction that can offset the upward pull-out force, thereby further improving the anti-pull-out effect of the spiral blade steel pipe micropile foundation of the assembled foundation for transmission lines.

[0037] It should be noted that if Figure 1 and Figure 3As shown, there are multiple mounting holes 11 on the prefabricated foundation 1, and the multiple mounting holes 11 are evenly spaced around the central axis of the prefabricated foundation 1. Correspondingly, there are multiple connecting rods 2, and the multiple connecting rods 2 pass through the mounting holes 11 one by one.

[0038] Alternatively, if Figure 1 and Figure 2 As shown, the limiting member 3 includes a blade 31 and a rib 32. When the connecting rod 2 passes through the mounting hole 11, the blade 31 is located on the portion of the connecting rod 2 passing through the mounting hole 11 and is extended in a spiral shape around a first direction. The rib 32 is located on the portion of the connecting rod 2 passing through the mounting hole 11, and the extension direction of the rib 32 is cross-set with the first direction.

[0039] Specifically, Figure 1 As shown, when the connecting rod 2 passes through the mounting hole 11, it means that the connecting rod 2 penetrates the mounting hole 11, the lower part of the connecting rod 2 is inserted into the space below the prefabricated foundation 1, such as the foundation, and the upper part of the connecting rod 2 is located in the mounting hole 11; the blade 31 can be a curved structure or a flat structure, and it only needs to ensure that the extension direction of the blade 31 is spiral. For example, Figure 2 As shown, the blade 31 is a curved structure; the rib 32 can be a rod-shaped structure or a tooth-shaped structure. For example, the rib 32 is a cylindrical structure and has multiple groups. The multiple groups of ribs 32 are arranged at equal intervals around the circumference of the connecting rod 2, that is, the first direction. Each group of ribs 32 has multiple ribs 32, and the multiple ribs 32 in the same group are arranged at equal intervals along the axial direction of the connecting rod 2, that is, the first direction; the extension direction of the ribs 32 is cross-set with the first direction, and can be perpendicular to each other or set at an acute angle or an obtuse angle.

[0040] In this optional embodiment, if Figure 1 and Figure 2As shown, blades 31 and ribs 32 are provided to form a limiter 3, wherein the blade 31 is mounted on the portion of the connecting rod 2 that passes through the mounting hole 11. With this arrangement, when the spiral blade steel pipe micropile foundation of the assembled foundation of the power transmission line is installed, the portion of the connecting rod 2 that passes through the mounting hole 11 will penetrate into the foundation, and the blade 31 can be placed in the foundation with the connecting rod 2. On this basis, the blade 31 is extended in a spiral shape around a first direction. With this arrangement, in the process of the connecting rod 2 penetrating the foundation, the blade 31 can cooperate with the rotation of the connecting rod 2 to achieve the effect of drilling holes in the foundation, thereby eliminating the need to pre-drill holes in the foundation, further simplifying the construction steps and effectively improving the construction efficiency. Moreover, in the process of the connecting rod 2 being screwed into the foundation, the extrusion force between the blade 31 and the foundation is continuously accumulated. After the connecting rod 2 is installed in place, the extrusion force between the blade 31 and the foundation When the force accumulates to the maximum, since the connecting rod 2 is fixedly connected to the prefabricated foundation 1, the squeezing force between the blade 31 and the foundation cannot be released. For the blade 31, the squeezing force has a component in the vertical direction, which exerts a downward pressure on the blade 31 and even the connecting rod 2, thereby enhancing the ability of the spiral blade steel pipe micropile foundation of the assembled foundation of the entire power transmission line to resist the upward pull force. On this basis, the rib 32 is installed on the portion of the connecting rod 2 located in the mounting hole 11. In this way, after the connecting rod 2 is installed in place, a solidifying material such as steel slag concrete can be poured into the mounting hole 11, which can not only seal the mounting hole 11, but also improve the bite between the connecting rod 2 and the solidifying material after the solidifying material solidifies, thereby preventing the formation of a structural weak area at the mounting hole 11, and further ensuring the integrity of the connecting rod 2 after being connected to the prefabricated foundation 1.

[0041] Optionally, the connecting rod 2 is a hollow structure filled with reinforcing material, and / or a reinforcing member is provided in the hollow structure, which is respectively fixedly connected to two inner walls of the connecting rod along a second direction, and the second direction is perpendicular to the first direction.

[0042] Specifically, Figure 2 As shown, the second direction is perpendicular to the first direction, which is the extension direction of the dotted line B, that is, the radial direction of the connecting rod 2; the connecting rod 2 can be a hollow structure with one end open, or a hollow structure with both ends open; the reinforcing material can be concrete, such as steel slag concrete, etc.; the reinforcing member can be a reinforcing rod, or a reinforcing block or a reinforcing frame and other structures.

[0043] In this optional embodiment, the connecting rod 2 is set to a hollow structure, and reinforcing material is filled in the connecting rod 2. This can not only reduce the amount of profile used in the connecting rod 2, reduce the weight of the connecting rod 2, and facilitate transportation and installation, but also ensure the overall structural strength of the connecting rod 2 through the reinforcing material, thereby meeting the installation needs of the spiral blade steel pipe micropile foundation of the assembled foundation for the transmission line.

[0044] In this optional embodiment or other optional embodiments of the present invention, a reinforcement member may be further provided in the hollow structure, and the reinforcement member is respectively fixedly connected to the two inner walls of the connecting rod 2 along the second direction, that is, the two ends of the reinforcement member are respectively fixedly connected to the two inner walls corresponding to the connecting rod 2 along the radial direction, thereby effectively improving the ability of the connecting rod 2 to resist shear force, thereby further improving the overall structural strength of the connecting rod 2 and meeting the installation requirements of the spiral blade steel pipe micropile foundation of the assembled foundation of the transmission line.

[0045] Alternatively, if Figure 2 As shown, on a plane perpendicular to the first direction, the blade 31 includes a first end 311, a second end 312 and a blade body 313, the first end 311 is connected to the connecting rod 2, and extends away from the connecting rod 2 along the second direction to form the blade body 313 and the second end 312 in sequence; when the connecting rod 2 passes through the mounting hole 11, relative to the first end 311 and the second end 312, the blade body 313 is away from the mounting hole 11 along the first direction.

[0046] Specifically, Figure 2 As shown, as the blade 31 extends spirally around the first direction, the first end 311 and the second end 312 are both side walls extending along the spiral line, and the blade body 313 is a sheet structure extending along the spiral line; when the connecting rod 2 passes through the mounting hole 11, that is, at this time, the blade 31 is located at the connecting rod 2 away from the mounting hole 11, wherein, relative to the first end 311 and the second end 312, the blade body 313 is away from the mounting hole 11 along the first direction, that is, the blade body 313 on the blade 31 is recessed downward.

[0047] In this optional embodiment, if Figure 2 As shown, the blade 31 is divided into a first end 311, a second end 312 and a blade body 313, and the blade body 313 is arranged in a recessed shape relative to the first end 311 and the second end 312. In this way, when the connecting rod 2 is screwed into the foundation, the cutting ability of the blade 31 on the foundation can be effectively improved, thereby improving the convenience of penetration of the connecting rod 2 and the construction efficiency; on this basis, after the connecting rod 2 is installed in place, due to the downward recessed setting of the blade body 313, the upper and lower surface areas of the blade body 313 are different, and the downward squeezing force of the foundation on the blade body 313 is greater than the upward supporting force on the blade body 313, thereby further improving the downward force of the foundation on the blade body 313, thereby ensuring the ability of the spiral blade steel pipe micropile foundation of the assembled foundation for the power transmission line to resist pull-out.

[0048] Alternatively, if Figure 1 and Figure 3As shown, the transmission line assembled foundation spiral blade steel pipe micropile foundation also includes a boot plate 4, a fixing rod 5 and a footrest plate 6. The footrest plate 6 is installed on the prefabricated foundation 1. The boot plate 4 is a cross structure and is fixedly installed on the footrest plate 6. A plurality of through holes 41 are penetrated on the boot plate 4. The opening directions of the plurality of through holes 41 are parallel to the horizontal direction and are cross-arranged with each other. Both ends of the fixing rod 5 are fixedly connected to the prefabricated foundation 1. There are a plurality of fixing rods 5, and the plurality of fixing rods 5 pass through the plurality of through holes 41 in a one-to-one correspondence.

[0049] Specifically, the footrest base plate 6 is installed on the prefabricated foundation 1 and fixed by concrete pouring or other methods; the boot plate 4 is a steel plate structure, and the two cross-arranged steel plates are fixedly connected by welding or riveting to form the boot plate 4; the fixing rod 5 is a steel structure.

[0050] In this optional embodiment, if Figure 1 and Figure 3 As shown, a boot plate 4, a fixing rod 5 and a footrest base plate 6 are provided to form a fixed connection structure between the prefabricated platform 1 and the body 9, wherein the boot plate 4 is a cross structure, and such a configuration can facilitate the fixed connection of the angle steel tower main material 91 and the angle steel tower oblique material 92 of the body 9 with the boot plate 4 respectively, and at the same time, the footrest base plate 6 is installed on the prefabricated platform 1, thereby realizing the connection between the body 9 and the prefabricated platform 1; on this basis, a plurality of through holes 41 are provided through the boot plate 4, wherein the opening directions of the plurality of through holes 41 are parallel to the horizontal direction and are cross-arranged with each other, and the fixing rod 5 has a plurality of through holes 41, which can be The through holes 41 are in one-to-one correspondence, and both ends of the fixing rods 5 are fixedly connected to the prefabricated foundation 1. In this way, a mesh structure can be formed by the fixing rods 5, and the fixing rods 5 and the inner walls of the through holes 41 can be mutually limited to achieve the limited fixation of the shoe plate 4. The setting of connecting the shoe plate 4 with the prefabricated foundation 1 through the anchor bolts on the footrest plate 6 can be cancelled, avoiding construction delays and material waste caused by the adjustment of the size of the anchor bolts and the problem of the anchor screw hole distance on the footrest plate 6. While ensuring the bearing capacity, the construction progress is effectively accelerated, the construction period is shortened, and the construction cost is reduced.

[0051] Alternatively, if Figure 1 and Figure 4 As shown, a stiffening plate 12 is provided on the prefabricated foundation 1 , and there are a plurality of stiffening plates 12 . The plurality of stiffening plates 12 are cross-arranged, and the mounting holes 11 are located between adjacent stiffening plates 12 .

[0052] Specifically, the stiffening plate 12 is integrally formed with the prefabricated foundation 1, and the stiffening plate 12 can also be set on the prefabricated foundation 1 by fixing methods such as welding or riveting; the stiffening plate 12 is extended along a straight line, and can also be extended along a curve; the stiffening plate 12 can be set at the bottom of the prefabricated foundation 1, and can also be set on the side of the prefabricated foundation 1.

[0053] In this optional embodiment, if Figure 1 and Figure 4 As shown, in order to improve the structural strength of the prefabricated cap 1 and thereby ensure the structural stability of the spiral blade steel pipe micropile foundation of the assembled cap for the transmission line, a stiffening plate 12 is provided on the prefabricated cap 1. The setting of the stiffening plate 12 can effectively improve the structural strength of the prefabricated cap 1; on this basis, the number of stiffening plates 12 is set to be multiple, and the multiple stiffening plates 12 are cross-arranged, and the mounting holes 11 are located between adjacent stiffening plates 12. This setting can not only further enhance the effect of the stiffening plates 12 on improving the structural strength of the prefabricated cap 1, but also facilitate the setting of the mounting holes 11, thereby avoiding damage to the structure of the stiffening plates 12 caused by the setting of the mounting holes 11, and at the same time effectively improve the structural strength around the mounting holes 11 through the stiffening plates 12.

[0054] Alternatively, if Figure 1 and Figure 3 As shown, the transmission line assembled foundation spiral blade steel pipe micropile foundation also includes a support plate 7, which is connected to the end of the connecting rod 2, and the edge of the mounting hole 11 is recessed to form a groove. When the connecting rod 2 passes through the mounting hole 11, the support plate 7 is placed in the groove and abuts against the bottom wall of the groove.

[0055] Specifically, the shape of the maximum cross-section of the support plate 7 can be circular or polygonal; the support plate 7 and the connecting rod 2 can be integrally formed or fixedly connected by welding or riveting; the shape of the groove is consistent with the maximum cross-sectional shape of the support plate 7, and the depth of the groove can be consistent with the thickness of the support plate 7, or can be greater than or less than the thickness of the support plate 7.

[0056] In this optional embodiment, if Figure 1 and Figure 3 As shown, in order to further improve the installation stability of the spiral blade steel pipe micropile foundation of the assembled foundation for power transmission lines, a support plate 7 is connected to the end of the connecting rod 2. At the same time, a recessed groove is formed at the edge of the mounting hole 11, wherein the support plate 7 can be placed in the recessed groove and abut against the bottom wall of the recessed groove. In this way, after the connecting rod 2 passes through the mounting hole 11, the support plate 7 can abut against the bottom wall of the recessed groove, thereby increasing the contact area between the overall structure composed of the connecting rod 2 and the support plate 7 and the prefabricated foundation 1, and increasing the structural strength of the fixed connection between the connecting rod 2 and the prefabricated foundation 1, thereby effectively improving the installation stability of the spiral blade steel pipe micropile foundation of the assembled foundation for power transmission lines.

[0057] Alternatively, if Figure 3As shown, a strip hole 71 is provided through the support plate 7, and the strip hole 71 is bent and extended around the first direction. A connecting hole 8 is provided on the bottom wall of the sink. When the support plate 7 is placed in the sink, the strip hole 71 and the connecting hole 8 are correspondingly connected and are used for the fastener to penetrate, so that the support plate 7 is fixedly connected to the prefabricated base 1.

[0058] Specifically, Figure 3 As shown, the number of the strip holes 71 can be set to multiple, and the multiple strip holes 71 are evenly spaced along the circumference of the support plate 7; the fixing member can be a bolt, and correspondingly, the connecting hole 8 is a threaded hole, and the fixing member can also be a rivet, and correspondingly, the connecting hole 8 is a riveting hole.

[0059] In this optional embodiment, if Figure 3 As shown, in order to improve the convenience of fixed connection between the support plate 7 and the prefabricated foundation 1, a strip hole 71 is provided through the support plate 7, and the strip hole 71 is bent and extended around the first direction. Correspondingly, a connecting hole 8 is provided on the bottom wall of the sink. When the support plate 7 is placed in the sink, the strip hole 71 and the connecting hole 8 are correspondingly connected. In this way, when the support plate 7 is placed in the sink, the extension setting of the strip hole 71 effectively increases the convenience of aligning the strip hole 71 and the connecting hole 8, thereby facilitating the insertion of subsequent fixings, and effectively improving the convenience and stability of the support plate 7 and the prefabricated foundation 1 when they are fixedly connected.

[0060] Second, as Figure 5 As shown, an embodiment of the present invention provides an installation method for a transmission line assembled cap spiral blade steel pipe micropile foundation, which is used for the above-mentioned transmission line assembled cap spiral blade steel pipe micropile foundation. The installation method for the transmission line assembled cap spiral blade steel pipe micropile foundation comprises the following steps: S1, completing the preparation of a prefabricated cap 1 of the transmission line assembled cap spiral blade steel pipe micropile foundation in a factory and transporting it to the installation site; S2, hoisting the prefabricated cap 1 to the installation position of the transmission line angle steel tower; S3, hoisting the connecting rod 2 of the transmission line assembled cap spiral blade steel pipe micropile foundation to the top of the installation hole 11 of the prefabricated cap 1, and inserting the connecting rod 2 into the installation hole 11 until the connecting rod 2 reaches a predetermined position; S4, pouring steel slag concrete into the installation hole 11, and fixing the connecting rod 2 to the prefabricated cap 1.

[0061] like Figure 1 and Figure 5 As shown, the technical effect of the installation method of the transmission line assembled foundation spiral blade steel pipe micropile foundation in this embodiment is the same as the technical effect of the transmission line assembled foundation spiral blade steel pipe micropile foundation as mentioned above, and will not be repeated here.

[0062] It should be noted that if Figure 1As shown, an embodiment of the present invention provides a transmission line angle steel tower, comprising a main body 9 and the above-mentioned transmission line assembled foundation spiral blade steel pipe micro pile foundation.

[0063] like Figure 1 As shown, the technical effect of the angle steel tower of the power transmission line in this embodiment is the same as the technical effect of the above-mentioned assembled foundation spiral blade steel pipe micropile foundation of the power transmission line, and will not be repeated here.

[0064] 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. A transmission line assembled cap spiral blade steel pipe micro pile foundation, characterized by: include: A prefabricated support (1), wherein a mounting hole (11) is provided through the prefabricated support (1), and the prefabricated support (1) is used to connect a body (9) of a transmission line angle steel tower; A connecting rod (2), the connecting rod (2) being used to penetrate the mounting hole (11) along a first direction and to be fixedly connected to the prefabricated support platform (1); A limiting member (3), the limiting member (3) being mounted on the connecting rod (2), the limiting member (3) being bent around the first direction and extending along the first direction; Wherein, the first direction is arranged at a preset angle with the vertical direction, and the preset angle is an acute angle.

2. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 1, characterized in that: The limiting member (3) comprises a blade (31) and a rib (32); when the connecting rod (2) passes through the mounting hole (11), the blade (31) is located on the portion of the connecting rod (2) passing through the mounting hole (11) and is extended in a spiral shape around the first direction; the rib (32) is located on the portion of the connecting rod (2) passing through the mounting hole (11), and the extension direction of the rib (32) is arranged to intersect with the first direction.

3. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 2, characterized in that: The connecting rod (2) is a hollow structure, the hollow structure is filled with reinforcing material, and / or a reinforcing member is provided in the hollow structure, the reinforcing member is respectively fixedly connected to two inner walls of the connecting rod along a second direction, and the second direction is perpendicular to the first direction.

4. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 3, characterized in that: On a plane perpendicular to the first direction, the blade (31) includes a first end (311), a second end (312) and a blade body (313); the first end (311) is connected to the connecting rod (2) and extends away from the connecting rod (2) along the second direction to sequentially form the blade body (313) and the second end (312); when the connecting rod (2) passes through the mounting hole (11), relative to the first end (311) and the second end (312), the blade body (313) is away from the mounting hole (11) along the first direction.

5. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 1, characterized in that: It also comprises a boot plate (4), a fixing rod (5) and a footrest plate (6), wherein the footrest plate (6) is mounted on the prefabricated support platform (1), the boot plate (4) is a cross structure and is fixedly mounted on the footrest plate (6), a plurality of through holes (41) are arranged through the boot plate (4), the opening directions of the plurality of through holes (41) are parallel to the horizontal direction and are arranged crosswise with each other, both ends of the fixing rod (5) are fixedly connected to the prefabricated support platform (1), the fixing rod (5) has a plurality of fixing rods (5), and the plurality of fixing rods (5) pass through the plurality of through holes (41) in a one-to-one correspondence.

6. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 1, characterized in that: The prefabricated foundation (1) is provided with a stiffening plate (12), and the stiffening plates (12) are multiple, and the multiple stiffening plates (12) are cross-arranged, and the mounting hole (11) is located between adjacent stiffening plates (12).

7. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 1, characterized in that: It also includes a support plate (7), the support plate (7) is connected to the end of the connecting rod (2), the edge of the mounting hole (11) is recessed to form a sink groove, and when the connecting rod (2) passes through the mounting hole (11), the support plate (7) is placed in the sink groove and abuts against the bottom wall of the sink groove.

8. The transmission line assembled cap spiral blade steel pipe micro pile foundation according to claim 7, characterized in that: The support plate (7) is provided with a strip hole (71) extending in a curved manner around the first direction. A connecting hole (8) is provided on the bottom wall of the sink. When the support plate (7) is placed in the sink, the strip hole (71) and the connecting hole (8) are correspondingly connected and are used for a fixing member to penetrate therethrough, so that the support plate (7) is fixedly connected to the prefabricated support platform (1).

9. A method for installing a transmission line assembled cap spiral blade steel pipe micropile foundation, characterized in that: For the transmission line assembled cap spiral blade steel pipe micro pile foundation according to any one of claims 1 to 8, the installation method of the transmission line assembled cap spiral blade steel pipe micro pile foundation comprises the following steps: S1. Complete the preparation of the prefabricated cap (1) of the transmission line assembled cap spiral blade steel pipe micropile foundation in the factory and transport it to the installation site; S2, hoisting the prefabricated foundation (1) to the installation position of the angle steel tower of the power transmission line; S3, hoisting the connecting rod (2) of the spiral blade steel pipe micropile foundation of the transmission line assembled foundation to the top of the mounting hole (11) of the prefabricated foundation (1), and inserting the connecting rod (2) into the mounting hole (11) until the connecting rod (2) reaches a predetermined position; S4, pouring steel slag concrete into the installation hole (11), and fixing the connecting rod (2) to the prefabricated foundation (1).

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