Fixed photovoltaic support device under large-range shallow deep liquefied soil layer condition
By introducing horizontal braces and cross-bracing rods between the columns outside the support plane into the photovoltaic support array, an overall force system is formed, which solves the problem of insufficient out-of-plane stiffness of the cantilever fixed support in the liquefied soil layer and improves the stability and bearing capacity of the structure.
Patent Information
- Application Number
- CN202422787934.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-15
AI Technical Summary
When the foundation soil liquefies under the conditions of a large-scale shallow and deep liquefied soil layer, the existing cantilever fixed photovoltaic bracket has insufficient out-of-plane stiffness, resulting in poor horizontal bearing capacity and stability, and is prone to collapse of the entire piece.
Horizontal braces and cross braces are introduced between the columns outside the support plane into the support array to form an overall force-bearing system. The out-of-plane connection stability of the support is enhanced through hinged connections, and purlins are set on the inclined beams of the support to fix the photovoltaic modules.
In the case of soil liquefaction, the support forms an integral structure, which enhances the horizontal bearing capacity and stability outside the plane, avoids the collapse of the entire piece, and improves wind resistance.
Smart Images
Figure CN223386669U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a fixed photovoltaic support device under conditions of a large-scale shallow and deep liquefied soil layer, belonging to the technical field of new energy solar power generation civil engineering structures. Background Art
[0002] Cantilever fixed photovoltaic bracket is the most commonly used type of photovoltaic bracket in existing photovoltaic fields. It mainly bears loads such as wind load, weight of components and bracket, snow load, and earthquake effect.
[0003] Its characteristic is its simple support structure. In-plane, it generally consists of 3 to 9 columns, forming a structural system through in-plane inter-column supports, diagonal beams, top horizontal supports, and purlins. Out-of-plane, it is a single-column cantilever structure. Upper loads are transmitted through the support columns to the support piles, and further to the foundation. Horizontal loads (wind loads) primarily act in-plane and are coordinated and borne by the entire string of supports (3 to 9 columns). Out-of-plane horizontal loads are minimal and are borne by the cantilever columns.
[0004] Conventional cantilever fixed supports have a simple structure and a single force transmission path. However, their disadvantage is low out-of-plane stiffness, resulting in the cantilever structure's poor ability to withstand horizontal loads. Under earthquake conditions, soil liquefaction occurs, and the piles lose their ability to remain firmly embedded in the soil. As the foundation soil liquefies, they lose most of their horizontal and some of their vertical bearing capacity, resulting in a hinged to semi-rigid connection between the upper column base and the pile. This creates an out-of-plane "mechanism," leading to a loss of out-of-plane bearing capacity and collapse. Utility Model Content
[0005] In response to the above technical problems, the utility model provides a fixed photovoltaic bracket device under conditions of a large range of shallow and deep liquefied soil layers, so that the conventional fixed bracket can still form a structural system out of the plane when the foundation soil in a large range of deep liquefied soil layers liquefies, thereby maintaining the stability of the structure and the out-of-plane bearing capacity when the soil layer liquefies.
[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0007] A fixed photovoltaic support device for large-scale shallow and deep liquefied soil conditions, comprising:
[0008] A support array, comprising a plurality of support piles arranged in an array, wherein the lower ends of the support piles are fixed in a large shallow and deep liquefied soil layer, and the upper ends of the support piles are fixed with support columns;
[0009] Along the longitudinal direction of the support array, horizontal struts between the adjacent support piles in the front and rear rows are provided, and both ends of the horizontal struts between the support piles are hinged to the support piles respectively;
[0010] Along the longitudinal direction of the support array, some rows of adjacent support piles are provided with cross-support rods between the columns outside the support plane, and both ends of the cross-support rods between the columns outside the support plane are hinged to the support piles respectively.
[0011] The fixed photovoltaic support device under the conditions of a large range of shallow and deep liquefied soil layers is preferably provided with a support inclined beam on the support column, and the two ends of the support inclined beam are hinged to the support pile through a support inclined brace 1 and a support inclined brace 2.
[0012] The fixed photovoltaic support device under the conditions of a large range of shallow and deep liquefied soil layers is preferably provided with a horizontal support rod in the support plane between adjacent support oblique beams along the lateral direction of the support array, and the horizontal support rod in the support plane is hinged to the support oblique beam.
[0013] The fixed photovoltaic support device under large-scale shallow and deep liquefied soil conditions is preferably provided with inter-column cross-support rods between adjacent support piles along the lateral direction of the support array, and the inter-column cross-support rods in the support plane are hinged to the support piles.
[0014] The fixed photovoltaic support device under the conditions of a large range of shallow and deep liquefied soil layers, preferably, the two ends of the cross support rods between the outer columns of the support plane are respectively hinged to the support piles through clamps three.
[0015] The fixed photovoltaic support device under the conditions of a large range of shallow and deep liquefied soil layers, preferably, the two ends of the horizontal support rods between the outer columns of the support plane are respectively hinged to the support piles through four clamps.
[0016] In the fixed photovoltaic support device under conditions of a large range of shallow and deep liquefied soil layers, preferably, the first support diagonal brace and the second support diagonal brace are respectively hinged to the support pile through a second clamp.
[0017] The fixed photovoltaic support device under the conditions of a large range of shallow and deep liquefied soil layers is preferably configured such that both ends of the cross-support rods between the columns in the support plane are respectively hinged to the support piles through a clamp.
[0018] The fixed photovoltaic support device under the conditions of a large-scale shallow and deep liquefied soil layer is preferably provided with a plurality of purlins on the support oblique beam, and the purlins are used to fix the photovoltaic components and connect adjacent support oblique beams at the same time.
[0019] The utility model has the following advantages due to the adoption of the above technical solution:
[0020] When the foundation soil liquefies, the existing cantilever fixed support can no longer withstand the horizontal force, and the support piles lose their embedding effect. The support becomes a single cantilever "mechanism" outside the plane, which will directly become unstable and collapse in large numbers under the influence of out-of-plane wind loads and earthquakes. With the present utility model, the front and rear rows of supports are connected as a whole to form an overall structure. When the soil layer liquefies, the structure as a whole is coordinated to bear the force, and continuous collapse will no longer occur. At the same time, the horizontal bearing capacity and stability outside the support are increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A schematic diagram of a fixed photovoltaic bracket provided in one embodiment of the present utility model;
[0022] Figure 2 A schematic cross-sectional view of a fixed photovoltaic support provided in this embodiment of the utility model;
[0023] Figure 3 A schematic longitudinal cross-sectional view of a fixed photovoltaic support provided in this embodiment of the utility model;
[0024] The reference numerals in the figures are as follows:
[0025] 1-support pile; 2-support diagonal beam; 3-purlin; 4-horizontal support rod in the support plane; 5-support column; 6-support diagonal brace one; 7-support diagonal brace two; 8-cross support rod between columns in the support plane; 9-hoop one; 10-hoop two; 11-horizontal support rod between columns outside the support plane; 12-cross support rod between columns outside the support plane; 13-hoop three; 14-hoop four. DETAILED DESCRIPTION
[0026] To make the purpose, technical solutions, and advantages of the present invention more clear, the following is a clear and complete description of the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work are within the scope of protection of the present invention.
[0027] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second", "third", "fourth" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
[0028] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inner side," "outer side," "lower," "upper," etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
[0029] Existing conventional cantilever fixed supports typically utilize a single pile and column configuration, with 3 to 9 piles in-plane and a single-pile, single-support arrangement out-of-plane. This results in low out-of-plane stiffness, resulting in poor bearing capacity and stability. In the event of an earthquake involving a large, deep, liquefied soil layer, the foundation soil liquefies, losing or partially losing its anchoring force on the piles. The horizontal forces and bending moments it can carry are significantly reduced, or even eliminated, making it unusable as a fixed end. The connection between the column and the pile forms a nearly hinged to rigid joint, with each row of supports having a single column and pile out-of-plane. In this configuration, the out-of-plane structure becomes a "mechanical" structure, with no fixed end. Under horizontal earthquakes, wind loads, and other factors, the loss of bearing capacity can lead to instability and widespread collapse.
[0030] Based on the above technical problems, the utility model provides a fixed photovoltaic bracket under conditions of shallow and deep liquefied soil layers over a large area. In a certain area, horizontal struts are added between the front and rear rows of adjacent brackets, and inter-column supports are added between the front and rear rows of columns. This allows the photovoltaic brackets in the entire area to be jointly stressed out of the plane, and multiple rows of bracket columns form a complete force system solution, which solves the problem of entire bracket collapse caused by foundation soil liquefaction under earthquake conditions, while increasing out-of-plane wind resistance and enhancing the stability of the overall structure out of the plane.
[0031] like Figure 1 、 2 As shown, the fixed photovoltaic support device under the conditions of a large shallow and deep liquefied soil layer involved in the utility model includes:
[0032] The support array includes a number of support piles 1 arranged in an array, the lower ends of the support piles 1 are fixed in a large shallow and deep liquefied soil layer, and the upper ends of the support piles 1 are fixed with support columns 5; along the longitudinal direction of the support array, horizontal support rods 11 are provided between adjacent support piles 1 in the front and rear rows, and the two ends of the horizontal support rods 11 are respectively hinged to the support piles 1; along the longitudinal direction of the support array, cross support rods 12 are provided between adjacent support piles 1 in some rows, and the two ends of the cross support rods 12 are respectively hinged to the support piles 1.
[0033] Furthermore, a support oblique beam 2 is provided on the support column 5 , and both ends of the support oblique beam 2 are hinged to the support pile 1 through a support oblique brace 1 6 and a support oblique brace 2 7 .
[0034] Furthermore, along the transverse direction of the bracket array, a horizontal support rod 4 is provided between adjacent supporting oblique beams 2 , and the horizontal support rod 4 is hinged to the supporting oblique beams 2 .
[0035] Furthermore, along the lateral direction of the bracket array, inter-column cross support rods 8 are provided between adjacent bracket piles 1 in the bracket plane, and the inter-column cross support rods 8 in the bracket plane are hinged to the bracket piles 1 .
[0036] Furthermore, both ends of the cross support rod 12 between the outer columns of the support plane are hinged to the support pile 1 through the clamp 3 13 respectively.
[0037] Furthermore, both ends of the horizontal strut 11 between the outer columns of the support plane are hinged to the support pile 1 through the fourth clamp 14; the first brace 6 and the second brace 7 are hinged to the support pile 1 through the second clamp 10.
[0038] Furthermore, both ends of the cross support rod 8 between the columns in the support plane are hinged to the support pile 1 through a clamp 9; a plurality of purlins 3 are arranged on the support diagonal beam 2, and the purlins 3 are used to fix the photovoltaic components and connect the adjacent support diagonal beams 2 at the same time.
[0039] In the present invention, the horizontal struts 11 between the outer columns of the support plane are horizontal struts between the outer columns of the support plane. They are designed as compression rods to ensure that the support plane can be subjected to both tension and compression when subjected to horizontal forces. The connection between the horizontal struts and the front and rear columns is hinged and connected by clamps. The cross-bracing rods 12 between the outer columns of the support plane are cross-bracing between the outer columns of the support plane. They are designed as tension rods. The connection between the column supports and the columns is hinged and connected by clamps. The cross-bracing of the horizontal struts 11 between the outer columns of the support plane and the cross-bracing rods 12 between the outer columns of the support plane allows adjacent photovoltaic supports to be connected as a whole outside the plane. When the foundation soil liquefies and loses its horizontal bearing capacity, causing the pile bottom to buckle, a complete force-bearing structural system is formed on the upper part.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A photovoltaic support device for fixing large-scale shallow and deep liquefied soil conditions, characterized in that: include: A support array, the support array comprising a plurality of support piles (1) arranged in an array, the lower ends of the support piles (1) being fixed in a large shallow and deep liquefied soil layer, and the upper ends of the support piles (1) being fixed with support columns (5); Along the longitudinal direction of the support array, horizontal support rods (11) are provided between adjacent support piles (1) in the front and rear rows, and both ends of the horizontal support rods (11) are hinged to the support piles (1). Along the longitudinal direction of the bracket array, cross-bracing rods (12) are provided between adjacent bracket piles (1) in some rows, and both ends of the cross-bracing rods (12) are hinged to the bracket piles (1).
2. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 1 is characterized in that: A support oblique beam (2) is also provided on the support column (5), and both ends of the support oblique beam (2) are hinged to the support pile (1) through a support oblique brace 1 (6) and a support oblique brace 2 (7).
3. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 2 is characterized in that: Along the transverse direction of the bracket array, a bracket plane horizontal support rod (4) is provided between adjacent bracket oblique beams (2), and the bracket plane horizontal support rod (4) is hinged to the bracket oblique beam (2).
4. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 1 is characterized in that: Along the transverse direction of the bracket array, inter-column cross support rods (8) are provided between adjacent bracket piles (1) in the bracket plane, and the inter-column cross support rods (8) in the bracket plane are hinged to the bracket piles (1).
5. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 1 is characterized in that: The two ends of the cross support rod (12) between the outer columns of the support plane are respectively hinged to the support pile (1) through a third clamp (13).
6. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 1 is characterized in that: The two ends of the horizontal support rod (11) between the outer columns of the support plane are respectively hinged to the support pile (1) through a clamp four (14).
7. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 2, characterized in that: The first bracket diagonal brace (6) and the second bracket diagonal brace (7) are respectively hinged to the bracket pile (1) via a second clamp (10).
8. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 4 is characterized in that: Both ends of the inter-column cross support rod (8) in the support plane are hinged to the support pile (1) via a clamp (9).
9. The photovoltaic support device for fixing large-scale shallow and deep liquefied soil layers according to claim 2, characterized in that: A plurality of purlins (3) are provided on the support oblique beams (2), and the purlins (3) are used to fix the photovoltaic components and simultaneously connect adjacent support oblique beams (2).