Screw anchor foundation and construction method

Abstract

The application provides a spiral anchor foundation and a construction method, and relates to the technical field of power transmission and transformation engineering. The problems that the existing spiral anchor foundation needs to be welded on site, the deviation exists in the positioning of the anchor rod punched into the soil, the welding workload is large, and the welding quality is difficult to guarantee are solved. The spiral anchor foundation comprises a steel pile cap, a plurality of round steel pipes are arranged on the bottom end face of the steel pile cap, and an upper tower leg is arranged on the top end face of the steel pile cap. Each round steel pipe is detachably connected with an anchor rod through an outer sleeve steel pipe. A spiral anchor disc is arranged on each anchor rod. The detachable installation of the spiral anchor foundation is realized, the spiral anchor foundation has the advantages of simple structure, convenient construction and no need for on-site 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 present 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 invention relates to a screw anchor foundation, which is an anchoring structure composed of a screw anchor and an upper pedestal, and mainly utilizes deep soil to resist the force of the upper structure. During the construction of the screw 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, in the existing screw anchor construction, on-site welding is often used to connect the anchor rod and the steel pedestal. However, during on-site welding, the space between the anchor rod and the steel pedestal is very small, and overhead welding is required in some places, which can only be welded from the outside. The welding is difficult, the weld is difficult to penetrate, the welding process is required to be high, and the welding quality is difficult to ensure. Moreover, for the group-anchor type screw anchor foundation, there are several screw 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 screw anchor foundation. Therefore, there is an urgent need for a screw 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 present invention provides a spiral anchor foundation and a construction method, which solves the problems that the existing spiral anchor foundation requires on-site welding, the positioning of the anchor rod driven into the soil is biased, resulting in a large welding workload and difficulty in ensuring welding quality.

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

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

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

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

[0008] Each anchor rod is provided with a spiral anchor disc.

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

[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 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 includes:

[0014] A first stiffening rib plate is provided on one side of the circular steel tube, wherein the first stiffening rib plate is fixedly connected to the circular steel tube and the steel cap respectively;

[0015] A second stiffening rib plate is provided 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 at preset intervals along the axial direction of each anchor rod.

[0017] The present invention provides a construction method for 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 casing steel pipe;

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

[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] Determine the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap based on the preset installation coordinate information of the steel cap, the size information of the outer steel pipe, the actual installation position information of each anchor rod, and the actual anchor rod inclination angle;

[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 actual installation position information of the anchor rod after installation are determined, including:

[0025] Determine the first coordinates and the second coordinates 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] Determining axis information of the anchor rod after installation based on the first coordinate and the second coordinate;

[0027] Determine the actual anchor rod inclination angle of the anchor rod after installation based on 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;

[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 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 coordinates of the midpoint of the first nail according to the coordinates of the endpoints at both ends of the first nail, and output the coordinates of the midpoint of the first nail as the first coordinates;

[0032] The coordinates of the midpoint of the second piercing nail are determined according to the coordinates of the endpoints at both ends of the second piercing nail, and the coordinates of the midpoint of the second piercing 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 based on the preset installation coordinate information of the steel cap, the size information of the outer steel pipe, the actual installation position information of each anchor rod, and the actual anchor rod inclination angle, 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 3D model of the spiral anchor foundation based on the actual position information of each anchor bolt, the actual anchor bolt inclination angle, the size information of the outer steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the circular 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 based on the actual position information of each anchor rod, the actual anchor rod inclination angle, the size information of the outer steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the circular steel pipe, including:

[0038] Generate an anchor model based on the actual position information and actual anchor inclination 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 circular steel pipe model on the outer casing steel pipe model according to the actual installation inclination angle of the circular 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 described in the present invention comprises a steel cap, with multiple round steel tubes mounted on its bottom end surface and an upper tower leg mounted on its top end surface. Each round steel tube is detachably connected to an anchor rod via an outer steel pipe. Each anchor rod is equipped with a spiral anchor plate. This solution enables detachable installation of the spiral anchor foundation, and offers the advantages of a simple structure, convenient construction, and no need for on-site welding. This effectively reduces the difficulty of spiral anchor foundation construction and improves its construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0047] Figure 3 This 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 Schematic diagram of actual anchor rod inclination angle in the construction method of the spiral anchor foundation of the present invention;

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

[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 This is a structural 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] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention 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 provided on the bottom end surface of the steel cap 3, and an upper tower leg 7 is provided on the top end surface of the steel cap 3;

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

[0059] Each anchor rod 1 is provided with a spiral anchor disc 2 .

[0060] In this 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. According to the installation parameters of the round steel pipe 4, the round steel pipe 4 is fixed to the bottom of the steel base 3, and the top of the steel base 3 is fixed to the tower leg 7; then, each round steel pipe 4 is detachably connected to each corresponding anchor rod 1 through multiple outer 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, and all components can be processed in the factory, without on-site welding and on-site anti-corrosion, and 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 advantage 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 multiple groups of first through holes penetrating the outer sleeve steel pipe 5, and the other end is provided with multiple groups of second through holes penetrating the outer sleeve steel pipe 5;

[0062] The connecting end of the round steel tube 4 and the outer 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 steel tube 5 is sleeved on the round steel tube 4 and is detachably connected to the round steel tube 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 calculation based on the actual situation 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 of the outer sleeve steel pipe 5 being 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 the 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 provided on one side of the round steel tube 4, wherein the first stiffening rib plate 6 is fixedly connected to the round steel tube 4 and the steel cap 3 respectively;

[0068] A second stiffening rib plate 8 is provided 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 between the round steel tube 4, the upper tower leg 7, the first stiffening rib 6 of the steel cap 3 and the second stiffening rib 8 is welding; the first stiffening rib 6 is designed to strengthen the connection between the round steel tube 4 and the steel cap 3; the second stiffening rib 8 is designed to strengthen the connection 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 the anchor rods 1 at preset intervals along the axial direction of the anchor rods 1.

[0071] An embodiment of the present invention provides a construction method for 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: 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;

[0073] Step 12: Install each anchor rod according to its preset installation position;

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

[0075] Step 14: Determine the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap based on the preset installation coordinate information of the steel cap, the size information of the outer 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 with 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 specifically involves screwing each anchor rod 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 steel pipe is connected to the top of the anchor rod, and whether partial earth excavation is required is determined based on the position of the outer steel pipe; step 15 specifically involves processing the entire foundation superstructure in the factory based on 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 the round steel pipe and the steel cap in the factory. At the same time, 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 structure is transported to the site, the outer steel pipe is put on the top of the anchor rod, and after the round steel pipe is in place, the outer steel pipe is slid upward to align with the hole position, and the outer steel pipe is connected to the round steel pipe and the anchor rod with bolts; if earth excavation is required, after the steel cap is installed, 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 is to first install the anchor rod, and then determine 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 weld and fix the round steel pipe, the steel cap and the upper tower leg in the factory according to the parameters, thereby eliminating the on-site welding work of the steel cap and the round steel pipe. At the same time, the welded round steel pipe and the anchor rod are detachably connected on-site through the outer steel pipe, which can avoid on-site welding, ensure the installation accuracy and reduce the installation difficulty. The installation structure is simple, and all components can be processed in the factory, without 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. It also has the advantage of quick and convenient disassembly.

[0080] In an optional embodiment of the present invention, determining the actual anchor rod inclination angle and actual installation position information of the anchor rod after installation processing based on the preset installation coordinate information of the steel cap includes:

[0081] Step 131, determining the first coordinates and the second coordinates 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;

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

[0083] Step 133, determining an actual anchor rod inclination angle of the anchor rod after installation based on 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 a 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: Obtain 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 piercing nail based on the endpoint coordinates of both ends of the first piercing nail, and output the midpoint coordinates of the first piercing nail as the first coordinates.

[0088] Step 1313: Determine the midpoint coordinates of the second piercing nail based on the endpoint coordinates of both ends of the second piercing nail, and output the midpoint coordinates of the second piercing 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 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 through-pin extend out of the anchor rod by the same length to facilitate on-site coordinate measurement (such as Figure 5 As shown, Figure 5 9 is the first nail), and the nail is removed after the measurement is completed. The actual anchor rod inclination angle in step 133 is as follows: Figure 4 As shown by the angle θ in ; step 134 can specifically determine the coordinates of the anchor rod endpoint according to the first coordinate, the second coordinate and the actual anchor rod inclination angle through basic trigonometric functions or directly determine the coordinates of the anchor rod endpoint according to the first coordinate and the actual anchor rod inclination angle, and determine the actual installation position information of the anchor rod 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: 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 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 spiral 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: Generate an anchor model based on 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: Generate 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 circular steel pipe model on the outer casing steel pipe model according to the actual installation inclination angle of the circular steel pipe;

[0100] Step 1425: Extend the second end of the circular steel tube model until it passes through the steel cap model, and cut off the portion where the second end of the circular steel tube model passes 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 portion 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 setting out and modeling according to the actual situation on site. 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. At the same time, the above three-dimensional model is converted into a two-dimensional drawing, and the two-dimensional drawing is 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, and the outer sleeve steel pipe is put on the outside of the anchor rod. 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 simulate the connection between the anchor rod and the steel cap by means of on-site layout and on-site measurement using three-dimensional software, so as to produce different superstructures according to local conditions, realize that all components are processed in the factory, improve mechanization efficiency, do not require on-site welding and on-site anti-corrosion, and are easy to construct. 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, specifically: according to the spatial position and angle required by the design, screw the anchor rods in turn until each anchor rod is screwed to the designed depth; then determine the length, thickness and matching bolt size position of the outer steel pipe according to calculation, and connect the outer steel pipe to the top of the anchor rod; determine whether there is partial earth excavation based on the position of the outer steel pipe; then as Figure 8 As shown, use graph paper cylinder A to simulate the round steel pipe and fix it on the top of the anchor rod. Determine the bottom elevation of the steel cap by on-site measurement and layout. Use graph paper B to simulate the bottom surface of the steel cap and cut the graph paper A at this plane. Mark the shape, position and size of the intersection of graph paper A and graph paper B on graph paper B. Repeat the above steps for each anchor rod and number them respectively. Return graph paper A and graph paper B to the factory, process the round steel pipe according to the shape and size of graph paper A, and cut the bottom surface of the steel cap according to the shape and size of graph paper B. The shape, position and size of the intersection surface are determined by welding the round steel pipe to the bottom surface of the steel cap, 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 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 will be 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 construction method for a spiral anchor foundation, characterized in that: The spiral anchor foundation includes a steel cap, a plurality of round steel tubes are provided on the bottom end surface of the steel cap, and an upper tower leg is provided on the top end surface of the steel cap; each of the round steel tubes is detachably connected to an anchor rod through an outer steel tube; each of the anchor rods is provided with a spiral anchor disc; one end of the outer steel tube is provided with a plurality of groups of first through holes penetrating the outer steel tube, and the other end is provided with a plurality of groups of second through holes penetrating the outer steel tube; a third through hole corresponding to the first through hole is provided at a connection end between the round steel tube and the outer steel tube; a fourth through hole corresponding to the second through hole is provided at a connection end between the anchor rod and the outer steel tube, 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 casing steel pipe; According to the preset installation position of each anchor rod, each anchor rod is installed. Specifically, according to the spatial position information and installation angle of each anchor rod, each anchor rod is screwed in sequence until each anchor rod is screwed to the preset installation depth, and the outer sleeve steel pipe is connected to the top of the 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; Determine the length of the round steel pipe and the parameters of the contact surface between the round steel pipe and the steel cap based on the preset installation coordinate information of the steel cap, the size information of the outer steel pipe, the actual installation position information of each anchor rod, and the actual anchor rod inclination angle; 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 steel pipe and the installed anchor rods to generate a spiral anchor foundation; Among them, according to the preset installation coordinate information of the steel cap, the actual anchor rod inclination angle and actual installation position information of the anchor rod after installation are determined, including: Determine the first coordinates and the second coordinates 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; Determining axis information of the anchor rod after installation based on the first coordinate and the second coordinate; Determine the actual anchor rod inclination angle of the anchor rod after installation based on 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; 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, specifically, determining the coordinates of the anchor rod endpoint according to the first coordinate, the second coordinate, and the actual anchor rod inclination angle; determining the actual installation position information of the anchor rod according to the coordinates of the anchor rod endpoint; The method of determining the first coordinates and the second coordinates 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 comprises: Obtaining the endpoint coordinates of both ends of the first through-pin and the endpoint coordinates of both ends of the second through-pin, specifically: measuring the endpoint coordinates of both ends of the first through-pin and the endpoint coordinates of both ends of the second through-pin using a total station; wherein the through-pins are set in advance before the anchor rod is installed or after the anchor rod is installed, and during installation, the through-pins pass through the anchor rod from the center of the through-hole, and the two ends of the through-pins extend out of the anchor rod by the same length, and the through-pins are removed after the measurement is completed; Determine the coordinates of the midpoint of the first nail according to the coordinates of the endpoints at both ends of the first nail, and output the coordinates of the midpoint of the first nail as the first coordinates; Determine the coordinates of the midpoint of the second nail according to the coordinates of the endpoints at both ends of the second nail, and output the coordinates of the midpoint of the second nail as the second coordinates; 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 based on the preset installation coordinate information of the steel cap, the size information of the outer steel pipe, the actual installation position information of each anchor rod, and the actual anchor rod inclination angle, including: According to the actual inclination angle of each anchor rod, determine the actual installation inclination angle of the round steel pipe; Generate a 3D model of the spiral anchor foundation based on the actual position information of each anchor bolt, the actual anchor bolt inclination angle, the size information of the outer steel pipe, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the circular 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.

2. The construction method of the spiral anchor foundation according to claim 1, characterized in that: The preset installation position information of each anchor rod includes: spatial position information of each anchor rod, installation angle and preset installation depth of each anchor rod.

3. The construction method of the spiral anchor foundation according to claim 1, characterized in that: Based on the actual position information of each anchor rod, the actual anchor rod inclination angle, the outer steel pipe size information, the preset installation coordinate information of the steel cap, and the actual installation inclination angle of the circular steel pipe, a 3D model of the spiral anchor foundation is generated, including: Generate an anchor model based on the actual position information and actual anchor inclination 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 circular steel pipe model on the outer casing steel pipe model according to the actual installation inclination angle of the circular 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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