Screw anchor foundation and construction method

Abstract

The invention provides a spiral anchor foundation and a construction method, and relates to the technical field of power transmission and transformation projects. The problems that an existing spiral anchor foundation needs to be welded on site, deviation exists in positioning of an anchor rod driven into soil, the welding workload is large, and the welding quality is difficult to guarantee are solved. The spiral anchor foundation comprises a steel bearing platform, a plurality of round steel pipes are arranged on the end face of the bottom of the steel bearing platform, and upper tower legs are arranged on the end face of the top of the steel bearing platform; each round steel pipe is detachably connected with an anchor rod through an outer sleeve steel pipe; each anchor rod is provided with a spiral anchor disc. According to the scheme, detachable installation of the spiral anchor foundation is achieved, the spiral anchor foundation has the advantages of being simple in structure, convenient to construct and free of field welding, the construction difficulty of the spiral anchor foundation is effectively reduced, and the construction quality of the spiral anchor foundation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission and transformation engineering, in particular to a spiral anchor foundation and a construction method. Background Art

[0002] The spiral anchor foundation is an anchoring structure composed of spiral anchors and upper caps, which mainly uses deep soil to resist the force of the upper structure. During the construction of the spiral anchor foundation, it is difficult to accurately control the position of the anchor rod screwed into the soil. After being driven into the soil, there is often a certain deviation between the actual position and the designed position. Therefore, during the existing spiral anchor construction, the anchor rod and the steel cap are often connected by on-site welding. During on-site welding, the space between the anchor rod and the steel cap is very small, and overhead welding is required in some places, which can only be welded from the outside. The welding difficulty is relatively large, the weld is difficult to penetrate, the welding process requirements are high, and the welding quality is difficult to ensure. In addition, for the group-anchor type spiral anchor foundation, there are several spiral anchors under each foundation, and the welding workload is huge, which further increases the welding difficulty and seriously restricts the promotion and application of the spiral anchor foundation. Therefore, there is an urgent need for a spiral anchor foundation and construction method that can avoid on-site welding, ensure the foundation processing quality, and reduce the construction difficulty. Summary of the invention

[0003] The invention provides a spiral anchor foundation and a construction method, which solves the problems that the existing spiral anchor foundation needs on-site welding, the positioning of the anchor rod driven into the soil has deviations, resulting in a large welding workload and difficulty in ensuring welding quality.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] The present invention provides a spiral anchor foundation, comprising:

[0006] A steel cap, wherein a plurality of round steel tubes are arranged on the bottom end surface of the steel cap, and an upper tower leg is arranged on the top end surface of the steel cap;

[0007] Each of the round steel pipes is detachably connected to an anchor rod through an outer sleeve steel pipe;

[0008] Each of the anchor rods is provided with a spiral anchor disc.

[0009] Optionally, one end of the outer sleeve steel pipe is provided with a plurality of groups of first through holes penetrating the outer sleeve steel pipe, and the other end is provided with a plurality of groups of second through holes penetrating the outer sleeve steel pipe;

[0010] The connecting end of the round steel pipe and the outer sleeve steel pipe is provided with a third through hole corresponding to the first through hole;

[0011] The connecting end of the anchor rod and the outer casing steel pipe is provided with a fourth through hole corresponding to the second through hole;

[0012] When in use, one end of the outer sleeve steel pipe is sleeved on the round steel pipe and is detachably connected to the round steel pipe by a first bolt passing through the first through hole and the third through hole, and the other end is sleeved on the anchor rod and is detachably connected to the anchor rod by a second bolt passing through the second through hole and the fourth through hole.

[0013] Optionally, the spiral anchor foundation further comprises:

[0014] A first stiffening rib plate is arranged on one side of the round steel pipe, and the first stiffening rib plate is fixedly connected to the round steel pipe and the steel cap respectively;

[0015] A second stiffening rib plate is arranged on one side of the upper tower leg, and the second stiffening rib plate is fixedly connected to the upper tower leg and the steel cap respectively.

[0016] Optionally, there are multiple spiral anchor plates, and all of them are welded to each anchor rod along the axial direction of each anchor rod at a preset interval.

[0017] The present invention provides a construction method of a spiral anchor foundation, wherein the spiral anchor foundation is any one of the spiral anchor foundations described above, and the method comprises:

[0018] Obtain the preset installation position information of each anchor rod, the preset installation coordinate information of the steel cap, the installation parameters of the upper tower leg, and the size information of the outer jacket steel pipe;

[0019] Install each anchor rod according to the preset installation position of each anchor rod;

[0020] According to the preset installation coordinate information of the steel cap, the actual anchor inclination angle and actual installation position information of each anchor after installation are determined;

[0021] According to the preset installation coordinate information of the steel cap, the size information of the outer jacket steel pipe, the actual installation position information of each anchor rod and the actual anchor rod inclination angle, the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined;

[0022] According to the length of the round steel pipe, the parameters of the contact surface between the round steel pipe and the steel cap, and the installation parameters of the upper tower leg, the round steel pipe, the upper tower leg and the steel cap are fixed, and the fixed structure is assembled with the outer sleeve steel pipe and the installed anchor rods to generate a spiral anchor foundation.

[0023] Optionally, the preset installation position information of each anchor rod includes: spatial position information of each anchor rod, an installation angle, and a preset installation depth of each anchor rod.

[0024] Optionally, according to the preset installation coordinate information of the steel cap, the actual anchor rod inclination angle and the actual installation position information of the anchor rod after installation processing are determined, including:

[0025] Determine the first coordinates and the second coordinates respectively corresponding to the two fourth through holes after the installation process by using the first through nails and the second through nails preset in the two fourth through holes on the anchor rod;

[0026] Determine the axis information of the anchor rod after installation according to the first coordinate and the second coordinate;

[0027] According to the preset installation coordinate information of the steel cap and the axis information of the anchor rod after installation, the actual anchor rod inclination angle after installation is determined, wherein the actual anchor rod inclination angle is the angle between the axis of the anchor rod and the normal line perpendicular to the steel cap;

[0028] The actual installation position information of the anchor rod is determined according to the first coordinate, the second coordinate and the actual anchor rod inclination angle.

[0029] Optionally, determining the first coordinates and the second coordinates respectively corresponding to the two fourth through holes after the installation process by using the first through nails and the second through nails preset in the two fourth through holes on the anchor rod includes:

[0030] Obtain the endpoint coordinates of both ends of the first pin and the endpoint coordinates of both ends of the second coordinate;

[0031] Determine the midpoint coordinates of the first nail according to the endpoint coordinates of both ends of the first nail, and output the midpoint coordinates of the first nail as the first coordinates;

[0032] The coordinates of the midpoint of the second nail are determined according to the coordinates of the endpoints at both ends of the second nail, and the coordinates of the midpoint of the second nail are output as the second coordinates.

[0033] Optionally, the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined according to the preset installation coordinate information of the steel cap, the size information of the outer casing steel pipe, the actual installation position information of each anchor rod and the actual anchor rod inclination, including:

[0034] According to the actual inclination angle of each anchor rod, determine the actual installation inclination angle of the round steel pipe;

[0035] Generate a three-dimensional model of the spiral anchor foundation based on the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer casing steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the round steel pipe;

[0036] The length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined according to the parameter information of the spiral anchor foundation model in the three-dimensional model.

[0037] Optionally, a three-dimensional model of the spiral anchor foundation is generated according to the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer casing steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the round steel pipe, including:

[0038] Generate an anchor model based on the actual position information and inclination angle of each anchor;

[0039] The preset installation coordinate information of the steel cap is used to generate the steel cap model;

[0040] Generating a jacket steel pipe model on the anchor rod model according to the size information of the jacket steel pipe;

[0041] Generating a first end of the round steel pipe model on the outer sleeve steel pipe model according to the actual installation inclination angle of the round steel pipe;

[0042] The second end of the circular steel tube model is extended until it passes through the steel cap model, and the portion where the second end of the circular steel tube model passes through the steel cap model is cut off to generate a three-dimensional model of the spiral anchor foundation.

[0043] The above solution of the present invention includes at least the following beneficial effects:

[0044] The spiral anchor foundation of the present invention comprises: a steel cap, a plurality of round steel pipes are arranged on the bottom end surface of the steel cap, and an upper tower leg is arranged on the top end surface of the steel cap; each of the round steel pipes is detachably connected to an anchor rod through an outer steel pipe; and each of the anchor rods is provided with a spiral anchor plate. The solution of the present invention realizes the detachable installation of the spiral anchor foundation, and has the advantages of simple structure, convenient construction and no need for on-site welding, which effectively reduces the difficulty of spiral anchor foundation construction and improves the construction quality of the spiral anchor foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a stereogram of the helical anchor foundation of the present invention;

[0046] Figure 2 yes Figure 1 Cross-sectional view at bb;

[0047] Figure 3 It is a schematic structural diagram of the spiral anchor foundation of the present invention after the round steel pipe, anchor rod and outer jacket steel pipe are connected;

[0048] Figure 4 It is a schematic diagram of the actual anchor rod inclination angle in the construction method of the spiral anchor foundation of the present invention;

[0049] Figure 5 It is a cross-sectional view after the first through-nail passes through the fourth through-hole on the anchor rod in the construction method of the spiral anchor foundation of the present invention;

[0050] Figure 6 It is a structural schematic diagram of the second end of the round steel pipe model passing through the steel cap during three-dimensional modeling in the construction method of the spiral anchor foundation of the present invention;

[0051] Figure 7 It is a structural schematic diagram of the second end of the circular steel pipe model after passing through the steel cap portion during three-dimensional modeling in the construction method of the spiral anchor foundation of the present invention;

[0052] Figure 8 yes Figure 1 Cross-sectional view at aa.

[0053] Description of reference numerals:

[0054] 1. Anchor rod; 2. Spiral anchor plate; 3. Steel cap; 4. Round steel pipe; 5. Outer steel pipe; 51. First bolt; 52. Second bolt; 6. First stiffening rib; 7. Upper tower leg; 8. Second stiffening rib; 9. First through nail. DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0056] like Figures 1 to 3 As shown, an embodiment of the present invention provides a spiral anchor foundation, comprising:

[0057] A steel cap 3, wherein a plurality of round steel tubes 4 are arranged on the bottom end surface of the steel cap 3, and an upper tower leg 7 is arranged on the top end surface of the steel cap 3;

[0058] Each of the round steel pipes 4 is detachably connected to an anchor rod 1 through an outer sleeve steel pipe 5;

[0059] A spiral anchor plate 2 is arranged on each anchor rod 1 .

[0060] In the present embodiment, when the spiral anchor foundation is in use, the anchor rod 1 is first installed according to the preset installation position of the preset anchor rod 1, and then the installation parameters of the round steel pipe 4 are determined, and the round steel pipe 4 is fixed to the bottom of the steel cap 3 according to the installation parameters of the round steel pipe 4, and the top of the steel cap 3 is fixed to the tower leg 7; then each round steel pipe 4 is detachably connected to each corresponding anchor rod 1 through a plurality of outer sleeve steel pipes 5; the spiral anchor foundation described in the present invention can be installed on-site without on-site welding, and the installation structure is simple, all components can be processed in the factory, and there is no need for on-site welding and on-site anti-corrosion. The construction is convenient, which can effectively reduce the difficulty of spiral anchor foundation construction and improve the construction quality of spiral anchor foundation. At the same time, it also has the advantages of quick and convenient disassembly.

[0061] In an optional embodiment of the present invention, one end of the outer sleeve steel pipe 5 is provided with a plurality of first through holes penetrating the outer sleeve steel pipe 5, and the other end is provided with a plurality of second through holes penetrating the outer sleeve steel pipe 5;

[0062] The connecting end of the round steel tube 4 and the outer sleeve steel tube 5 is provided with a third through hole corresponding to the first through hole;

[0063] The connecting end of the anchor rod 1 and the outer casing steel pipe 5 is provided with a fourth through hole corresponding to the second through hole;

[0064] When in use, one end of the outer sleeve steel pipe 5 is sleeved on the round steel pipe 4 and is detachably connected to the round steel pipe 4 by a first bolt 51 passing through the first through hole and the third through hole, and the other end is sleeved on the anchor rod 1 and is detachably connected to the anchor rod 1 by a second bolt 52 passing through the second through hole and the fourth through hole.

[0065] In this embodiment, the outer sleeve steel pipe 5 is a standard connecting part, and parameters such as bolt size, quantity, and arrangement can be determined according to calculations based on actual conditions on site; in a preferred embodiment, there are two first through holes, two second through holes, two fourth through holes, and two third through holes; this embodiment ensures the stability of the connection and the accuracy of the installation through the design that the outer sleeve steel pipe 5 is sleeved on both ends of the round steel pipe 4 and the anchor rod 1; through the outer sleeve steel pipe 5 and the design of bolt connection, the detachable connection of the spiral anchor foundation is realized, and at the same time, it has the advantages of using fewer bolt installation parts and being suitable for large-scale rapid installation.

[0066] In an optional embodiment of the present invention, the spiral anchor foundation further comprises:

[0067] A first stiffening rib plate 6 is arranged on one side of the round steel pipe 4, and the first stiffening rib plate 6 is fixedly connected to the round steel pipe 4 and the steel cap 3 respectively;

[0068] A second stiffening rib plate 8 is arranged on one side of the upper tower leg 7, and the second stiffening rib plate 8 is fixedly connected to the upper tower leg 7 and the steel cap 3 respectively.

[0069] In this embodiment, the connection methods among the round steel pipe 4, the upper tower leg 7, the first stiffening rib plate 6 of the steel cap 3 and the second stiffening rib plate 8 are all welding; the first stiffening rib plate 6 is designed to strengthen the connection relationship between the round steel pipe 4 and the steel cap 3; the second stiffening rib plate 8 is designed to strengthen the connection relationship between the upper tower leg 7 and the steel cap 3.

[0070] In an optional embodiment of the present invention, there are multiple spiral anchor plates 2, and all of them are welded to each anchor rod 1 along the axial direction of each anchor rod 1 at a preset interval.

[0071] An embodiment of the present invention provides a construction method of a spiral anchor foundation, wherein the spiral anchor foundation is any one of the spiral anchor foundations described above, and the method comprises:

[0072] Step 11, obtaining the preset installation position information of each anchor rod, the preset installation coordinate information of the steel cap, the installation parameters of the upper tower leg, and the size information of the outer jacket steel pipe;

[0073] Step 12, installing each anchor rod according to the preset installation position of each anchor rod;

[0074] Step 13, determining the actual anchor rod inclination angle and actual installation position information of each anchor rod after installation processing according to the preset installation coordinate information of the steel cap;

[0075] Step 14, determining the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap according to the preset installation coordinate information of the steel cap, the size information of the outer jacket steel pipe, the actual installation position information of each anchor rod and the actual anchor rod inclination angle;

[0076] Step 15, according to the length of the round steel pipe, the parameters of the contact surface between the round steel pipe and the steel cap, and the installation parameters of the upper tower leg, the round steel pipe, the upper tower leg and the steel cap are fixed, and the fixed structure is assembled through the outer sleeve steel pipe and the installed anchor rods to generate a spiral anchor foundation.

[0077] Among them, the preset installation position information of each anchor rod includes: the spatial position information, installation angle and preset installation depth of each anchor rod; the size information of the outer jacket steel pipe can determine the shear force and bending moment exerted on the outer jacket steel pipe according to the force applied to the outer jacket steel pipe, and determine the size of the outer jacket steel pipe according to the shear force and bending moment.

[0078] In this embodiment, step 12 is specifically to screw the anchor rods in sequence according to the spatial position information and installation angle of each anchor rod until each anchor rod is screwed to the set installation depth; at the same time, the outer sleeve steel pipe is connected to the top of the anchor rod, and whether there is partial earth excavation is determined according to the position of the outer sleeve steel pipe; step 15 is specifically to process the entire foundation upper structure in the factory according to the length of the round steel pipe, the parameters of the contact surface between the round steel pipe and the steel cap, and the installation parameters of the upper tower leg, including welding between the round steel pipe and the steel cap in the factory, and at the same time, in order to simplify the tower foot connection structure and facilitate on-site construction, the upper tower leg can also be welded with the steel cap in the factory; after all welding is completed, all components are galvanized in the factory; then the structure is transported to the site, the outer sleeve steel pipe is sleeved on the top of the anchor rod, and after the round steel pipe is in place, the outer sleeve steel pipe is slid upward, aligned with the hole position, and the outer sleeve steel pipe is connected to the round steel pipe and the anchor rod with bolts; if there is earth excavation, after the installation of the steel cap is completed, the earth is backfilled and compacted to complete the construction of the spiral anchor foundation without on-site welding.

[0079] The construction method of the spiral anchor foundation described in the present invention first installs the anchor rod, then determines the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap according to the installation parameters, and welds and fixes the round steel pipe, the steel cap and the upper tower leg in the factory according to the parameters, thereby eliminating the welding work of the steel cap and the round steel pipe on site. At the same time, the welded round steel pipe and the anchor rod are detachably connected on site through the outer sleeve steel pipe, which can avoid on-site welding, ensure installation accuracy and reduce installation difficulty. The installation structure is simple, all components can be processed in the factory, and there is no need for on-site welding and on-site anti-corrosion. The construction is convenient, which can effectively reduce the difficulty of spiral anchor foundation construction and improve the construction quality of spiral anchor foundation. At the same time, it also has the advantages of quick and convenient disassembly.

[0080] In an optional embodiment of the present invention, according to the preset installation coordinate information of the steel cap, the actual anchor rod inclination angle and the actual installation position information of the anchor rod after the installation process are determined, including:

[0081] Step 131, determining the first coordinates and the second coordinates respectively corresponding to the two fourth through holes after the installation process through the first through nails and the second through nails preset in the two fourth through holes on the anchor rod;

[0082] Step 132, determining the axis information of the anchor rod after installation according to the first coordinate and the second coordinate;

[0083] Step 133, determining the actual anchor rod inclination angle of the anchor rod after installation according to the preset installation coordinate information of the steel cap and the axis information of the anchor rod after installation, wherein the actual anchor rod inclination angle is the angle between the axis of the anchor rod and the normal line perpendicular to the steel cap;

[0084] Step 134, determining the actual installation position information of the anchor rod according to the first coordinate, the second coordinate and the actual anchor rod inclination angle.

[0085] In an optional embodiment of the present invention, step 131 may include:

[0086] Step 1311, obtaining the endpoint coordinates of both ends of the first nail and the endpoint coordinates of both ends of the second nail;

[0087] Step 1312: determine the midpoint coordinates of the first nail according to the endpoint coordinates of both ends of the first nail, and output the midpoint coordinates of the first nail as the first coordinates;

[0088] Step 1313: determine the midpoint coordinates of the second nail according to the endpoint coordinates of both ends of the second nail, and output the midpoint coordinates of the second nail as the second coordinates.

[0089] In this embodiment, step 1311 can specifically measure the endpoint coordinates of the two ends of the first through-pin and the endpoint coordinates of the two ends of the second through-pin respectively by means of a total station; wherein, the through-pin can be set in advance before the anchor rod is installed, or can be set after the anchor rod is installed. During installation, the through-pin passes through the anchor rod from the center of the through hole, and the two ends of the two through-pins respectively pass through the same length of the anchor rod to facilitate on-site coordinate measurement (such as Figure 5 As shown, Figure 5 9 in the figure is the first penetration nail), and the penetration nail is removed after the measurement is completed. The actual anchor rod inclination angle in step 133 is as follows: Figure 4 As shown in the angle θ in ; step 134 can specifically determine the coordinates of the anchor endpoint according to the first coordinate, the second coordinate and the actual anchor inclination angle through basic trigonometric functions or directly determine the coordinates of the anchor endpoint according to the first coordinate and the actual anchor inclination angle, and determine the actual installation position information of the anchor according to the endpoint coordinates.

[0090] In an optional embodiment of the present invention, step 14 may include:

[0091] Step 141, determining the actual installation inclination angle of the round steel pipe according to the actual inclination angle of each anchor rod;

[0092] Step 142, generating a three-dimensional model of the spiral anchor foundation according to the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer casing steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the round steel pipe;

[0093] Step 143, determining the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap according to the parameter information of the screw anchor foundation model in the three-dimensional model.

[0094] In this embodiment, the actual installation inclination angle of the round steel pipe and the actual installation inclination angle of the outer sleeve steel pipe are the same as the actual anchor rod inclination angle of the anchor rod; step 143 is specifically when the three-dimensional model is determined, the size and spatial position of the round steel pipe in the three-dimensional model are the actual position obtained by lofting and modeling according to the actual situation on site, that is, the length of the round steel pipe, and the contact surface between the round steel pipe and the steel cap in the three-dimensional model is the actual connection surface between the steel cap and the round steel pipe, that is, the parameters of the contact surface.

[0095] In an optional embodiment of the present invention, step 142 may include:

[0096] Step 1421, generating an anchor model according to the actual position information and the actual anchor inclination angle of each anchor;

[0097] Step 1422, generating a steel cap model based on the preset installation coordinate information of the steel cap;

[0098] Step 1423, generating a jacket steel pipe model on the anchor rod model according to the size information of the jacket steel pipe;

[0099] Step 1424, generating a first end of the round steel pipe model on the outer jacket steel pipe model according to the actual installation inclination angle of the round steel pipe;

[0100] Step 1425, extending the second end of the circular steel tube model until it passes through the steel cap model, and cutting off the portion of the second end of the circular steel tube model passing through the steel cap model to generate a three-dimensional model of the spiral anchor foundation.

[0101] In this embodiment, before constructing the three-dimensional model, a reference point can be determined in the three-dimensional model, and based on the reference point, all position information is converted into coordinate information corresponding to the three-dimensional model, and three-dimensional modeling is performed according to the specific coordinate information; Figure 6 and Figure 7 As shown, the design of step 1425 can be used to determine the basic parameters of the round steel pipe. Specifically, in the three-dimensional model, the part of the round steel pipe that exceeds the bottom surface of the steel cap is cut off. At this time, the size and spatial position of the round steel pipe are the actual positions obtained by lofting and modeling according to the actual situation on site, and the contact surface between the round steel pipe and the steel cap in the three-dimensional model is the actual connection surface between the steel cap and the round steel pipe; after the three-dimensional model is determined, the parameters such as the size, spatial position, and contact surface position of the round steel pipe with the steel cap can be derived through the three-dimensional model, and the above three-dimensional model can be converted into a two-dimensional drawing, and the two-dimensional drawing can be delivered to the factory for processing. The entire foundation superstructure, the round steel pipe and the steel cap are welded in the factory. At the same time, in order to simplify the tower foot connection structure and facilitate on-site construction, the upper tower leg can also be welded to the steel cap in the factory. After all welding is completed, all components are galvanized in the factory. Then the foundation superstructure is transported to the site, the outer sleeve steel pipe is put on the outside of the anchor rod, and after the round steel pipe is in place, the outer sleeve steel pipe is slid upwards and aligned with the hole position, and the outer sleeve steel pipe is connected to the round steel pipe and the anchor rod with bolts. If there is earth excavation, after the steel cap is installed, the earth will be backfilled and compacted to complete the construction of the outer sleeve steel pipe group anchor type spiral anchor foundation that does not require on-site welding.

[0102] In this embodiment, the spiral anchor foundation has a simple structure and can be constructed by on-site layout and on-site measurement, using three-dimensional software to simulate the connection between the anchor rod and the steel cap, so that different superstructures can be manufactured according to local conditions, and all components can be processed in the factory, thereby improving mechanization efficiency. No on-site welding and on-site anti-corrosion are required, and the construction is convenient. It can effectively reduce the difficulty of spiral anchor foundation construction and improve the quality of spiral anchor foundation construction. The spiral anchor foundation described in the present invention can also use graph paper to simulate the connection between the anchor rod and the steel cap and carry out specific construction, which is as follows: according to the spatial position and angle required by the design, each anchor rod is screwed in turn until each anchor rod is screwed to the designed depth; then the length, thickness and matching bolt size position of the outer jacket steel pipe are determined by calculation, and the outer jacket steel pipe is connected to the top of the anchor rod; according to the position of the outer jacket steel pipe, it is determined whether there is partial earth excavation; then as Figure 8 As shown, the round steel pipe is simulated by using a graph paper cylinder A and fixed on the top of the anchor rod. The bottom elevation of the steel cap is determined by on-site measurement and setting out. The bottom surface of the steel cap is simulated by using a graph paper B and the graph paper A is cut at this plane. The shape, position and size of the intersection of the graph paper A and the graph paper B are marked on the graph paper B. The above steps are repeated for each anchor rod and numbered respectively. The graph paper A and the graph paper B are returned to the factory, and the round steel pipe is processed according to the shape and size of the graph paper A, and the round steel pipe is processed according to the shape and size of the graph paper B. The round steel pipe is welded to the bottom surface of the steel cap according to the shape, position and size of the intersection surface, and then the upper tower leg, the first stiffening rib plate and the second stiffening rib plate are welded to the steel cap in sequence. After the welding is completed, the structure is galvanized; the structure is transported to the site, the outer sleeve steel pipe is put on the outside of the anchor rod, and after the round steel pipe is in place, the outer sleeve steel pipe is slid upwards, aligned with the hole position, and the outer sleeve steel pipe is connected to the round steel pipe and the anchor rod with bolts; if there is earth excavation, after the installation of the steel cap is completed, the earth is backfilled and compacted to complete the construction of the spiral anchor foundation.

[0103] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A spiral anchor foundation, characterized in that: include: A steel cap (3), wherein a plurality of round steel tubes (4) are arranged on the bottom end surface of the steel cap (3), and an upper tower leg (7) is arranged on the top end surface of the steel cap (3); Each of the round steel pipes (4) is detachably connected to an anchor rod (1) via an outer sleeve steel pipe (5); Each anchor rod (1) is provided with a spiral anchor disc (2).

2. The spiral anchor foundation according to claim 1, characterized in that: One end of the outer sleeve steel pipe (5) is provided with a plurality of first through holes penetrating the outer sleeve steel pipe (5), and the other end is provided with a plurality of second through holes penetrating the outer sleeve steel pipe (5); The connecting end of the round steel pipe (4) and the outer sleeve steel pipe (5) is provided with a third through hole corresponding to the first through hole; The connecting end of the anchor rod (1) and the outer casing steel pipe (5) is provided with a fourth through hole corresponding to the second through hole; When in use, one end of the outer sleeve steel pipe (5) is sleeved on the round steel pipe (4) and is detachably connected to the round steel pipe (4) by a first bolt (51) passing through the first through hole and the third through hole, and the other end is sleeved on the anchor rod (1) and is detachably connected to the anchor rod (1) by a second bolt (52) passing through the second through hole and the fourth through hole.

3. The spiral anchor foundation according to claim 1, characterized in that: Also includes: A first stiffening rib plate (6) is arranged on one side of the round steel pipe (4), wherein the first stiffening rib plate (6) is fixedly connected to the round steel pipe (4) and the steel cap (3) respectively; A second stiffening rib plate (8) is arranged on one side of the upper tower leg (7), and the second stiffening rib plate (8) is fixedly connected to the upper tower leg (7) and the steel cap (3) respectively.

4. The spiral anchor foundation according to claim 1, characterized in that: There are a plurality of spiral anchor plates (2), and all are welded to the anchor rods (1) along the axial direction of the anchor rods (1) at preset intervals.

5. A construction method for a spiral anchor foundation, characterized in that: The helical anchor foundation is a helical anchor foundation as claimed in any one of claims 1 to 4, and the method comprises: Obtain the preset installation position information of each anchor rod, the preset installation coordinate information of the steel cap, the installation parameters of the upper tower leg, and the size information of the outer jacket steel pipe; Install each anchor rod according to the preset installation position of each anchor rod; According to the preset installation coordinate information of the steel cap, the actual anchor inclination angle and actual installation position information of each anchor after installation are determined; According to the preset installation coordinate information of the steel cap, the size information of the outer jacket steel pipe, the actual installation position information of each anchor rod and the actual anchor rod inclination angle, the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined; According to the length of the round steel pipe, the parameters of the contact surface between the round steel pipe and the steel cap, and the installation parameters of the upper tower leg, the round steel pipe, the upper tower leg and the steel cap are fixed, and the fixed structure is assembled with the outer sleeve steel pipe and the installed anchor rods to generate a spiral anchor foundation.

6. The construction method of the spiral anchor foundation according to claim 5, characterized in that: The preset installation position information of each anchor rod includes: spatial position information, installation angle and preset installation depth of each anchor rod.

7. The construction method of the spiral anchor foundation according to claim 5, characterized in that: According to the preset installation coordinate information of the steel cap, the actual anchor inclination angle and actual installation position information of the anchor after installation are determined, including: Determine the first coordinates and the second coordinates respectively corresponding to the two fourth through holes after the installation process by using the first through nails and the second through nails preset in the two fourth through holes on the anchor rod; Determine the axis information of the anchor rod after installation according to the first coordinate and the second coordinate; According to the preset installation coordinate information of the steel cap and the axis information of the anchor rod after installation, the actual anchor rod inclination angle after installation is determined, wherein the actual anchor rod inclination angle is the angle between the axis of the anchor rod and the normal line perpendicular to the steel cap; The actual installation position information of the anchor rod is determined according to the first coordinate, the second coordinate and the actual anchor rod inclination angle.

8. The construction method of the spiral anchor foundation according to claim 7, characterized in that: Determining the first coordinates and the second coordinates respectively corresponding to the two fourth through holes after the installation process by using the first through nails and the second through nails preset in the two fourth through holes on the anchor rod includes: Obtain the endpoint coordinates of both ends of the first pin and the endpoint coordinates of both ends of the second coordinate; Determine the midpoint coordinates of the first nail according to the endpoint coordinates of both ends of the first nail, and output the midpoint coordinates of the first nail as the first coordinates; The coordinates of the midpoint of the second nail are determined according to the coordinates of the endpoints at both ends of the second nail, and the coordinates of the midpoint of the second nail are output as the second coordinates.

9. The construction method of the spiral anchor foundation according to claim 5, characterized in that: According to the preset installation coordinate information of the steel cap, the size information of the outer jacket steel pipe, the actual installation position information of each anchor rod and the actual anchor rod inclination, the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined, including: According to the actual inclination angle of each anchor rod, determine the actual installation inclination angle of the round steel pipe; Generate a three-dimensional model of the spiral anchor foundation based on the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer casing steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the round steel pipe; The length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap are determined according to the parameter information of the spiral anchor foundation model in the three-dimensional model.

10. The construction method of the spiral anchor foundation according to claim 9, characterized in that: According to the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer casing steel pipe, the preset installation coordinate information of the steel cap and the actual installation inclination angle of the round steel pipe, a three-dimensional model of the spiral anchor foundation is generated, including: Generate an anchor model based on the actual position information and inclination angle of each anchor; The preset installation coordinate information of the steel cap is used to generate the steel cap model; Generating a jacket steel pipe model on the anchor rod model according to the size information of the jacket steel pipe; Generating a first end of the round steel pipe model on the outer sleeve steel pipe model according to the actual installation inclination angle of the round steel pipe; The second end of the circular steel tube model is extended until it passes through the steel cap model, and the portion where the second end of the circular steel tube model passes through the steel cap model is cut off to generate a three-dimensional model of the spiral anchor foundation.

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