CN116677001A - Photovoltaic support pile foundation construction method, pile foundation and photovoltaic support - Google Patents
Photovoltaic support pile foundation construction method, pile foundation and photovoltaic support Download PDFInfo
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- CN116677001A CN116677001A CN202310771801.7A CN202310771801A CN116677001A CN 116677001 A CN116677001 A CN 116677001A CN 202310771801 A CN202310771801 A CN 202310771801A CN 116677001 A CN116677001 A CN 116677001A
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 62
- 239000002689 soil Substances 0.000 claims abstract description 36
- 230000001965 increasing effect Effects 0.000 claims abstract description 12
- 238000009933 burial Methods 0.000 claims description 34
- 208000014617 hemorrhoid Diseases 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000012938 design process Methods 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/10—Supporting structures directly fixed to the ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The application relates to the field of photovoltaic equipment, and provides a photovoltaic support pile foundation construction method, a pile foundation and a photovoltaic support. The construction method of the photovoltaic bracket pile foundation comprises the steps of carrying out a drawing force test to obtain an actual friction coefficient of an area to be installed; prefabricating the upright post at the same time or before carrying out the drawing force test; prefabricating the auxiliary pile after carrying out a drawing force test; and fixedly connecting the auxiliary pile with the upright post to strengthen the drawing force of the upright post. A pile foundation comprises a column and a secondary pile; the vertical pile is provided with a buried end capable of being buried in soil and an assembling end suitable for installing a bearing body; the auxiliary pile is arranged on the upright post and close to the embedded end, so that the drawing force of the upright post is enhanced. The photovoltaic support comprises pile foundations. According to the photovoltaic bracket pile foundation construction method, the pile foundation and the photovoltaic bracket, provided by the application, the upright post can be prefabricated at the same time or before the drawing force test, and the drawing force of the upright post is increased through fixedly connecting the auxiliary pile after the drawing force test, so that the upright post meets the drawing force test requirement, the construction period is greatly shortened, and the project cost is reduced.
Description
Technical Field
The application relates to the field of photovoltaic equipment, in particular to a photovoltaic support pile foundation construction method, a pile foundation and a photovoltaic support.
Background
In an actual photovoltaic power station project, a drawing force test is required to be carried out and the burial depth of the stand column is required to be determined, so that the length of the stand column is determined, the length of the stand column cannot be determined before a drawing force test result comes out, but the drawing force test is generally carried out by a third party detection mechanism, the period from entrusting to the result coming out is longer, the upper structure of the stand column of many photovoltaic power station projects is always determined, the burial depth of the lower part of the stand column is not determined later, the construction of the photovoltaic power station projects temporarily enters a stagnation state, and the whole project period of the photovoltaic power station projects is greatly influenced.
Disclosure of Invention
Aiming at the technical problems, the application aims to provide a photovoltaic support pile foundation construction method, a pile foundation and a photovoltaic support, wherein the upright post can be prefabricated at the same time or before the drawing force test, and the drawing force of the upright post is increased through fixedly connecting with the auxiliary pile after the drawing force test, so that the upright post meets the drawing force test requirement, the construction period is greatly shortened, the time required by projects is reduced, and the project cost is reduced.
In order to achieve the above object, the present application provides a photovoltaic bracket pile foundation construction method, comprising: carrying out a drawing force test to obtain an actual friction coefficient of the area to be installed;
prefabricating the upright column at the same time or before the drawing force test is performed;
prefabricating a secondary pile after performing the pullout force test;
and fixedly connecting the auxiliary pile with the upright post so as to strengthen the drawing force of the upright post.
In some embodiments, the fixedly connecting the secondary pile to the upright comprises: the upright post and the auxiliary pile are buried in the to-be-installed area together after being fixedly connected, or the upright post and the auxiliary pile are buried in the to-be-installed area respectively and then are fixedly connected.
In some embodiments, before the fixedly connecting the secondary pile with the upright, the method further comprises testing the upright and the secondary pile, wherein the testing process comprises:
respectively driving a single pile, welding an integrated pile and fixing the integrated pile by bolts, and recording the time and pile head deformation conditions required by driving the same depth respectively;
and respectively extracting the single pile, the welding integrated pile and the bolt fixing integrated pile, and recording the actual minimum pulling force value of the extraction.
In some embodiments, the design of the upright specifically includes:
preliminarily calculating the theoretical drawing force of the stand column, and obtaining the contact area of the stand column and soil according to the theoretical drawing force; calculating the theoretical burial depth of the stand column based on the contact area of the stand column and soil and the theoretical drawing force of the stand column;
and determining the actual burial depth of the upright post according to the theoretical burial depth of the upright post, wherein the actual burial depth of the upright post is smaller than the theoretical burial depth.
In some embodiments, the design process of the secondary pile comprises: determining the actual drawing force of the upright post based on the actual burial depth of the upright post and the actual friction coefficient of the area to be installed;
calculating a difference value between the theoretical drawing force and the actual drawing force, namely a secondary pile drawing force;
and calculating the contact area of the auxiliary pile and the soil based on the auxiliary pile drawing force and the actual friction coefficient of the area to be installed.
According to another aspect of the present application there is further provided a pile foundation comprising a pile and a secondary pile, prefabricated either simultaneously with or prior to carrying out a pullout force test, said pile having a buried end capable of being buried in soil for fixing said pile; the assembly end is suitable for mounting a carrier; prefabricating after carrying out the drawing force test, vice stake install in the stand is close to bury the end, just vice stake at least partly buries into soil, vice stake with stand fixed connection is used for increasing the area of contact of stand and soil, and then reinforcing the drawing force of stand.
In some embodiments, the upright and the secondary pile are each provided with an open slot, and the open slot of the upright is disposed opposite or opposite to the open slot opening of the secondary pile.
In some embodiments, the post and the secondary pile are secured by fasteners or welding.
In some embodiments, the secondary pile is at least partially coincident with the column.
In some embodiments, the secondary pile is one, the secondary pile being fixedly mounted to either side of the upright.
In some embodiments, the number of the auxiliary piles is 2 or more, and any two sides or the same side of the upright post are respectively and fixedly installed.
In some embodiments, the cross-sections of the upright and the secondary pile are each any one of H-shaped, C-shaped, i-shaped, cross-shaped, L-shaped, T-shaped, or rectangular.
According to another aspect of the present application there is further provided a photovoltaic bracket comprising any of the above-described preferred embodiments.
Compared with the prior art, the photovoltaic support pile foundation construction method, the pile foundation and the photovoltaic support have the following beneficial effects:
1. according to the photovoltaic bracket pile foundation construction method provided by the application, the stand columns can be prefabricated at the same time or before the drawing force test, and the drawing force of the stand columns is increased through fixedly connecting the auxiliary piles after the drawing force test, so that the stand columns meet the drawing force test requirements, the construction period is greatly shortened, the time required by projects is reduced, and the project cost is reduced.
2. According to the pile foundation provided by the application, the stand column can be subjected to standardized production, the material preparation is convenient, the project delivery progress is accelerated, even the purline, the main shaft, the photovoltaic module and other supporting bodies can be assembled on the assembly end of the stand column after the stand column is buried in the installation area in advance, after the drawing force test result comes out, the auxiliary pile is installed on the buried end of the stand column according to the difference between the theoretical drawing force of the stand column and the actual drawing force of the stand column, the construction period is greatly shortened, and the cost is reduced.
Drawings
The above features, technical features, advantages and implementation of the present application will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.
FIG. 1 is a flow chart of a method of photovoltaic stent pile foundation construction in one embodiment;
FIG. 2 is a flow chart of the design of a column in one embodiment;
FIG. 3 is a flow chart of the design of a secondary pile in one embodiment;
FIG. 4 is an assembly view A of a column and a secondary pile in one embodiment;
FIG. 5 is a cross-sectional view A of a riser and secondary pile in one embodiment;
FIG. 6 is an assembly view B of a column and a secondary pile in another embodiment;
FIG. 7 is a cross-sectional view B of a riser and secondary pile in another embodiment;
FIG. 8 is a position diagram of a column and a single secondary pile;
FIG. 9 is a position diagram of a column and a plurality of secondary piles;
fig. 10 is a schematic view of a column structure in one embodiment.
Reference numerals illustrate:
pile foundation 1, upright post 11, hole 110, embedded end 111, assembly end 112, auxiliary pile 12 and fastener 13.
Detailed Description
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will explain the specific embodiments of the present application with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the application, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For simplicity of the drawing, only the parts relevant to the application are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Embodiment one:
in one embodiment, referring to fig. 1, the present application provides a photovoltaic bracket pile foundation construction method, comprising:
and S100, carrying out a drawing force test to obtain the actual friction coefficient of the area to be installed. In this embodiment, the drawing force test is generally performed by a third party detection mechanism, so that the actual friction coefficient of the area to be installed can be obtained.
It is worth noting that the drawing force test time period of the third party detection mechanism is longer, the whole project progress can be seriously delayed, and therefore, before the drawing force test result of the third party comes out, the theoretical friction coefficient of the area to be installed can be obtained according to project experience data, the annual soil property report of the area to be installed and the like. The soil properties of the areas to be installed comprise granularity, water content, looseness and the like of the soil, the soil friction coefficients of different areas to be installed are different, even in the same area to be installed, the soil properties of different positions are different, so that the friction coefficients are also different, and when a drawing force test is carried out, a plurality of points are selected for the area to be installed to carry out a sampling test, so that the actual friction coefficient of the soil of the area to be installed is determined. The test of the friction coefficient can be carried out by the methods of laboratory test, direct dynamic sounding, static load test, flat load test, drilling sampling and the like after sampling, and the actual data of the mechanical property and the friction coefficient of the soil on site can be obtained through the tests. The method for determining the friction coefficient is a relatively mature technology, and is a common technical means in the field, and is not described herein.
S101, prefabricating the column 11 at the same time or before the drawing force test is performed. In this embodiment, the drawing force test time of the third party is generally longer, and when or before the actual friction coefficient of the area to be installed comes out, the post 11 can be prefabricated according to the theoretical friction coefficient of the area to be installed in order to save the overall time of the project, and the post 11 can be embedded in the area to be installed in advance and assembled with the purlin, the main shaft, the photovoltaic module and other supporting bodies on the post 11, the prefabrication of the post 11 comprises one or more of the processes of designing, producing, purchasing, preparing materials, transporting, embedding and the like, and the post 11 is prefabricated without waiting for the drawing force test result to come out, thereby greatly shortening the construction period, reducing the time required by the project and reducing the project cost. Specifically, referring to fig. 2, the design of the upright 11 includes:
and S200, primarily calculating the theoretical drawing force of the upright post 11, and obtaining the contact area of the upright post 11 and the soil according to the theoretical drawing force. Specifically, the prefabricated upright 11 needs to determine the theoretical drawing force of the upright 11 according to the annual maximum wind speed of the area to be installed and in combination with factors such as snow load, earthquake, temperature, fixed load and the like. The theoretical drawing force calculation method of the upright post 11 is also a common technical means for those skilled in the art, and will not be described herein. The theoretical friction coefficient of the area to be installed and the theoretical drawing force of the upright 11 are both obtainable according to the prior art by a person skilled in the art, with a certain realistic reliability. The theoretical friction coefficient of the area to be installed is B1, the theoretical drawing force of the upright 11 is A1, and the contact area of the upright 11 and the soil is S1, s1=a1/B1.
S201 calculates the theoretical burial depth of the stand column 11 based on the contact area of the stand column 11 with the soil and the theoretical drawing force of the stand column 11. Specifically, when the upright post 11 is prefabricated, the upright posts 11 with different cross sections can be selected according to project requirements, the cross section of the upright post 11 is any one of H-shaped, C-shaped, I-shaped, cross-shaped, L-shaped, T-shaped or rectangular, and the circumferences of the outer rings of the upright posts 11 are different. The circumference of the outer ring of the upright 11 is C, and the theoretical burial depth of the upright 11 is H1, h1=s1/C.
S202, determining the actual burial depth of the upright post 11 according to the theoretical burial depth of the upright post 11, wherein the actual burial depth of the upright post 11 is smaller than the theoretical burial depth. Specifically, in general, the actual burial depth of the upright post 11 is about 10-20% smaller than the theoretical burial depth of the upright post 11, and the actual burial depth of the upright post 11 is H2. If the theoretical burial depth of the upright post 11 is 2 meters, the actual burial depth is 1.6-1.8 meters. The actual burial depth of the upright 11 is the depth of the upright 11 actually burial into the soil.
S102, prefabricating the sub-pile 12 after performing the pullout force test. In this embodiment, there is a slight deviation between the theoretical friction coefficient of the area to be installed and the actual friction coefficient of the area to be installed, and the auxiliary pile 12 is used to increase the drawing force of the upright 11 so as to meet the actual requirements of the project. The application mainly protects the concept of adding the auxiliary pile 12 on the basis of the upright post 11, prefabricating the upright post 11 at the same time or before the drawing force test, and prefabricating the auxiliary pile 12 after the drawing force test. Specifically, referring to fig. 3, the design of the secondary pile 12 includes:
s300 determines the actual drawing force of the stud 11 based on the actual burial depth of the stud 11 and the actual coefficient of friction of the area to be installed. Specifically, the actual burial depth of the upright 11 is H2, the actual friction coefficient of the area to be mounted is B2, the actual drawing force of the upright 11 is A2, a2=h2×b2.
S301, calculating a difference between the theoretical drawing force and the actual drawing force, namely the drawing force of the subsidiary pile 12. The secondary stake 12 has a pull out force a3, a3=a2-A1.
S302 calculates the contact area of the subsidiary pile 12 with the soil based on the drawing force of the subsidiary pile 12 and the actual friction coefficient of the area to be installed. Specifically, the contact area of the subsidiary pile 12 with the soil is S2, s2=a3/B2. The cross section of the auxiliary pile 12 can also be selected to be different according to project requirements, the cross section of the auxiliary pile 12 also comprises any one of H shape, C shape, I shape, cross shape, L shape, T shape or rectangle, the cross section of the auxiliary pile 12 can be consistent with the cross section of the upright post 11, the cross section of the auxiliary pile 12 can also be different from the cross section of the upright post 11, the circumference of the outer ring of the auxiliary pile 12 can be obtained according to the cross section of the auxiliary pile 12, and the burial depth of the auxiliary pile 12 can be calculated according to the circumference of the outer ring of the auxiliary pile 12. The outer circumference of the sub pile 12 is C2, and the burial depth of the sub pile 12 is H2, h2=b2/C2.
S103 fixedly connects the sub pile 12 with the post 11 to enhance the drawing force of the post 11. Specifically, the fixed connection means that the upright post 11 and the auxiliary pile 12 do not move relative to each other after being connected, and the fixed connection mode comprises detachable fixation through a fastener 13 or integral fixation through a welding mode. Specifically, when the upright post 11 and the auxiliary pile 12 are detachably fixed through the fastening piece 13, holes 110 for the fastening piece 13 to pass through are correspondingly formed in the upright post 11 and the auxiliary pile 12 respectively, as shown in fig. 10, a plurality of holes 110 for the fastening piece to pass through are formed in the upright post 11, and the holes 110 are arranged in a diamond shape, and in the diamond-shaped arrangement mode, the connection between the upright post 11 and the auxiliary pile 12 is more stable. The application of the order of fixedly connecting the auxiliary pile 12 with the upright 11 and burying the auxiliary pile 12 in the region to be installed is not further limited, and the upright 11 and the auxiliary pile 12 can be buried in the region to be installed after being fixedly connected together, or the upright 11 and the auxiliary pile 12 can be respectively buried in the region to be installed and then fixedly connected.
Meanwhile, a more proper fixed connection method can be selected according to the result time of the drawing force test. Aiming at the condition that the upright posts 11 and the auxiliary piles 12 are determined synchronously, compared with the mode of adopting a single upright post 11, the combined arrangement mode of the main pile 12 and the auxiliary pile 12 can reduce the burial depth of the upright posts 11 and shorten the piling time, thereby shortening the project period. Aiming at the situation that the drawing force test result comes out later, the upright post 11 can be driven into the ground firstly, then the auxiliary pile 12 is driven according to the drawing force test result, finally the fixing of the upright post 11 and the auxiliary pile 12 is finished, at the moment, the auxiliary pile 12 needs to be partially exposed out of the ground, and the hole 110 for accommodating the fastener 13 to penetrate through is formed in the part of the auxiliary pile 12 exposed out of the ground so as to realize the fixed connection with the upright post 11.
The fixed connection of the upright 11 and the auxiliary pile 12 should also consider the situation that the upright 11 and the auxiliary pile 12 partially overlap. The application does not limit the fixing form of the auxiliary pile 12 and the upright post 11 further, as long as the total drawing force of the upright post 11 and the auxiliary pile 12 can meet the drawing force test requirement. If the upright post 11 and the auxiliary pile 12 are in surface-to-surface connection, the influence of the superposition area of the upright post 11 and the auxiliary pile 12 on the drawing force of the upright post 11 and the auxiliary pile 12 needs to be considered, and the embedded total area of the upright post 11 and the auxiliary pile 12 can be calculated; the total embedded area is equal to the sum of the embedded actual area of the upright post 11 and the embedded area of the subsidiary pile 12 and the overlapping area of the upright post 11 and the subsidiary pile 12 is subtracted. Or if the burial depths of the upright post 11 and the auxiliary pile 12 are the same, the total outer ring perimeter of the upright post 11 and the auxiliary pile 12 can be calculated, and the total outer ring perimeter is equal to the sum of the perimeter of the upright post 11 and the perimeter of the auxiliary pile 12 minus the coincident perimeter of the upright post 11 and the auxiliary pile 12. If the upright 11 and the auxiliary pile 12 are fixedly connected through points and surfaces or points and points, the overlapping area of the upright 11 and the auxiliary pile 12 tends to zero, and the overlapping area is not considered.
It should be noted that the present application is to add the auxiliary pile 12 on the basis of the upright post 11, and all the fixed connection modes and the fixed connection sequences of the upright post 11 and the auxiliary pile 12 are included in the present application.
Preferably, before fixedly connecting the secondary pile 12 with the upright 11, further comprising testing the upright 11 and the secondary pile 12 to determine whether the selected secondary pile 12 meets the requirements and which form of welding and bolting is more satisfactory, the testing process comprises:
s400, respectively driving a single pile, welding an integrated pile and fixing the integrated pile by bolts, and recording time and pile head deformation conditions required by driving the same depth respectively. Specifically, the driving difficulty of the single pile, the welding integrated pile and the bolt fixing integrated pile and the friction force change of the single pile, the welding integrated pile and the bolt fixing integrated pile after the same depth is driven can be judged by recording the time required for driving the same depth and the deformation condition of the pile head respectively. According to the recorded driving time and pile head deformation, the upright post 11 and the auxiliary pile 12 can be fixedly connected and then buried in the to-be-installed area together, or the upright post 11 and the auxiliary pile 12 are respectively buried in the to-be-installed area and then fixedly connected.
S401, respectively extracting the single pile, the welding integrated pile and the bolt fixing integrated pile, and recording the actual minimum pulling force value of the extraction. Specifically, the actual minimum tensile force value refers to the minimum tensile force used for pulling out the test object such as a single pile, a welded pile or a bolt-fixed pile from the soil. The actual minimum pulling force value of the pulling-out is recorded to obtain the actual pulling force value which is actually increased after the auxiliary pile 12 is increased, so that whether the pile foundation pulling force after the auxiliary pile 12 is increased meets the design requirement or not is judged, the theoretical pulling force and the actual pulling force are prevented from being greatly different, and the reliability of the auxiliary pile 12 is improved. The single pile is an independent upright post 11, and the welding integral pile is formed by welding the upright post 11 and the auxiliary pile 12; the bolt-fixing integral pile is formed by fixedly connecting a column 11 and a secondary pile 12 through a fastener 13 such as a bolt. In addition, through the welding integrative dress and the integrative stake of bolt fastening respectively test, can know whether the actual pulling force of different fixed modes to the pile foundation has the difference to confirm which kind of fixed mode that adopts can be better satisfy the design requirement.
Embodiment two: referring to fig. 4 to 7, the present application also provides a pile foundation 1 comprising a column 11 and a secondary pile 12, the column 11 being prefabricated at the same time or before the drawing force test, the column 11 having a buried end 111 and an assembly end 112, the buried end 111 being capable of being buried in soil for fixing the column 11; the mounting end 112 is adapted to mount a carrier; the auxiliary pile 12 is prefabricated after the drawing force test is performed, the auxiliary pile 12 is installed on the upright post 11 and close to the embedded end 111, the auxiliary pile 12 is at least partially embedded into soil, and the auxiliary pile 12 is fixedly connected with the upright post 11 and used for increasing the contact area between the upright post 11 and the soil and further enhancing the drawing force of the upright post 11.
The pile foundation 1 in this embodiment is obtained by adopting the construction method of the photovoltaic bracket pile foundation 1 in any embodiment, the auxiliary pile 12 can be fixedly connected with the upright post 11, the pulling force of the upright post 11 is increased, the auxiliary pile 12 and the upright post 11 bear the lifting force of the upper structure of the upright post 11 together so as to meet the pulling force requirements of different photovoltaic power stations, the upright post 11 can be produced and prepared in advance, the upright post 11 is convenient to prepare materials, the project delivery progress is accelerated, even the upright post 11 can be driven into a project area installation area in advance, and supporting bodies such as purlines, spindles, photovoltaic modules and the like are assembled on the assembly end 112 of the upright post 11, after the pulling force test result is obtained, the auxiliary pile 12 is installed at the embedded end 111 of the upright post 11 according to the difference between the theoretical pulling force of the upright post 11 and the actual pulling force of the upright post 11, the construction period is greatly shortened, the project required time is shortened, and the project cost is reduced.
Specifically, the post 11 is prefabricated while or before the drawing force test is performed, the auxiliary pile 12 is prefabricated after the drawing force test is performed, the contact area and the burial depth of the auxiliary pile 12 are determined according to the difference between the theoretical drawing force of the post 11 and the actual drawing force of the post 11, the auxiliary pile 12 can be partially inserted into the ground or can be completely inserted into the ground, the fixed connection form of the auxiliary pile 12 and the post 11 is not further limited, the lower end part of the auxiliary pile 12 can be fixedly connected with the lower end part of the post 11, the upper end part of the auxiliary pile 12 can be fixedly connected with the lower end part of the post 11, and the like, as long as the auxiliary pile 12 can increase the drawing force of the pile foundation 1.
Further, the upright post 11 and the auxiliary pile 12 are both provided with open grooves, and the open grooves of the upright post 11 are opposite to or opposite to the open grooves of the auxiliary pile 12.
It should be noted that the pile foundation 1 currently on the market is generally divided into two types, one type is a split type, the upright 11 is fixed on a cement precast pile or a spiral ground pile, and the other type is an integral type, and the upright 11 is a buried pile. The design is updated in the existing embedded pile form, the auxiliary pile 12 is added on the upright post 11 under the condition that the original upright post 11 is not changed in embedded depth, and the pulling force of the pile foundation 1 is increased to enable the pile foundation 1 to meet the pulling force test requirement, so that the requirement of standardized production of the upright post 11 can be met.
Further, referring to fig. 7, the upright 11 and the sub pile 12 are each provided with an open groove, and the open groove of the upright 11 is arranged opposite or opposite to the open groove of the sub pile 12.
In this embodiment, the upright post 11 and the auxiliary pile 12 are both provided with open grooves, so that the contact area between the upright post 11 and the auxiliary pile 12 and the soil can be increased while the materials of the upright post 11 and the auxiliary pile 12 are saved.
Specifically, when the open groove of the column 11 is provided so as to face the open groove opening of the sub pile 12, the groove wall of the column 11 is at least partially abutted against the groove wall of the sub pile 12. When the open groove of the column 11 and the open groove of the sub pile 12 are disposed opposite to each other, the groove bottom of the column 11 and the groove bottom of the sub pile 12 are at least partially abutted against each other. It is noted that the columns 11 and the secondary piles 12 may be cross-section piles, mouth-section piles, I-section piles, well-section piles, C-section piles, H-section piles, etc. So long as the stud 11 and the secondary stake 12 are able to meet project requirements and pullout force testing.
Further, the column 11 and the sub pile 12 are fixed by a fastener 13 or welding. The fastener 13 includes a fixing structure such as a bolt, a rivet, a stud, a screw, or the like. The upright post 11 and the auxiliary pile 12 are fixedly connected by the fastener 13, so that the upright post 11 and the auxiliary pile 12 can be fixedly installed through the fastener 13 in a project site or a production factory, and then the upright post 11 and the auxiliary pile 12 are driven into soil together; alternatively, the upright post 11 may be driven into the soil, the sub-pile 12 may be driven into the soil, and then the upright post 11 and the sub-pile 12 may be fixedly connected by the fastener 13. The fixing manner of the upright post 11 and the auxiliary pile 12 in the application is not limited to these, as long as the upright post 11 and the auxiliary pile 12 can be fixedly connected and the auxiliary pile 12 can increase the pulling force of the pile foundation 1.
Further, the secondary pile 12 at least partially coincides with the upright 11. In this embodiment, the overlapping portion and the arrangement direction of the auxiliary pile 12 and the upright 11 are not further limited, and the auxiliary pile 12 may be arranged on either side of the upright 11, and the bottoms of the auxiliary pile 12 and the upright 11 may or may not be aligned.
Further, referring to fig. 8, the subsidiary piles 12 are one, and the subsidiary piles 12 are fixedly installed at either side of the upright 11. In this embodiment, a single sub pile 12 may be fixedly mounted on either side wall of the upright 11, specifically determined according to the contact area of the sub pile 12 with the soil. If the contact area required for the sub-pile 12 is large, a side wall with the smallest area of the pillar 11 is selected to connect the sub-pile 12.
Further, referring to fig. 9, the number of the auxiliary piles 12 is 2 or more, and any two sides or the same side of the upright 11 are fixedly installed respectively. Specifically, 2 or more secondary piles 12 and the upright 11 have various installation forms, and 2 or more secondary piles 12 may be respectively installed on any two sides of the upright 11 or may be fixedly installed on the same side of the upright 11. When 2 or more auxiliary piles 12 are positioned on the same side of the upright post 11, the 2 or more auxiliary piles 12 can be fixedly connected with the same side wall of the upright post 11, or the 2 or more auxiliary piles 12 can be sequentially connected. The specific number of the auxiliary piles 12 can be selected according to the contact area between the auxiliary piles 12 and soil and project requirements, and even the sizes of the auxiliary piles 12 can be different, so long as the drawing forces of the upright posts 11 and the auxiliary piles 12 meet the drawing force test.
Preferably, the cross sections of the upright posts 11 and the auxiliary piles 12 are respectively any one of H-shaped, C-shaped, I-shaped, cross-shaped, L-shaped, T-shaped or rectangular.
Embodiment III: referring to fig. 4 to 9, the present application further provides a photovoltaic bracket, including the pile foundation 1 in any of the above embodiments.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (13)
1. The construction method of the pile foundation of the photovoltaic bracket is characterized by comprising the following steps of:
carrying out a drawing force test to obtain an actual friction coefficient of the area to be installed;
prefabricating the upright column at the same time or before the drawing force test is performed;
prefabricating a secondary pile after performing the pullout force test;
and fixedly connecting the auxiliary pile with the upright post so as to strengthen the drawing force of the upright post.
2. The method for constructing a pile foundation of a photovoltaic bracket according to claim 1, wherein,
the fixing of the auxiliary pile to the upright post includes:
the upright post and the auxiliary pile are buried in the to-be-installed area together after being fixedly connected, or the upright post and the auxiliary pile are buried in the to-be-installed area respectively and then are fixedly connected.
3. The method of claim 1 or 2, further comprising testing the post and the secondary pile before fixedly connecting the secondary pile to the post, the testing process comprising:
respectively driving a single pile, welding an integrated pile and fixing the integrated pile by bolts, and recording the time and pile head deformation conditions required by driving the same depth respectively;
and respectively extracting the single pile, the welding integrated pile and the bolt fixing integrated pile, and recording the actual minimum pulling force value of the extraction.
4. The photovoltaic bracket pile foundation construction method according to claim 1 or 2, wherein the design of the upright post specifically comprises:
preliminarily calculating the theoretical drawing force of the stand column, and obtaining the contact area of the stand column and soil according to the theoretical drawing force;
calculating the theoretical burial depth of the stand column based on the contact area of the stand column and soil and the theoretical drawing force of the stand column;
and determining the actual burial depth of the upright post according to the theoretical burial depth of the upright post, wherein the actual burial depth of the upright post is smaller than the theoretical burial depth.
5. The photovoltaic bracket pile foundation construction method of claim 4, wherein the design process of the auxiliary pile comprises the following steps:
determining the actual drawing force of the upright post based on the actual burial depth of the upright post and the actual friction coefficient of the area to be installed;
calculating a difference value between the theoretical drawing force and the actual drawing force, namely a secondary pile drawing force;
and calculating the contact area of the auxiliary pile and the soil based on the auxiliary pile drawing force and the actual friction coefficient of the area to be installed.
6. A pile foundation, comprising:
the vertical column is prefabricated at the same time or before the drawing force test is carried out, and is provided with an embedded end and an assembling end, wherein the embedded end can be embedded into soil and is used for fixing the vertical column; the assembly end is suitable for mounting a carrier;
the auxiliary pile is prefabricated after the drawing force test is carried out, the auxiliary pile is installed on the upright post and is close to the embedded end, the auxiliary pile is at least partially embedded into soil, and the auxiliary pile is fixedly connected with the upright post and is used for increasing the contact area between the upright post and the soil and further enhancing the drawing force of the upright post.
7. The pile foundation of claim 6, wherein the pile foundation comprises,
the upright posts and the auxiliary piles are respectively provided with an open slot, and the open slots of the upright posts are opposite to or opposite to the open slots of the auxiliary piles.
8. Pile foundation according to claim 6, characterised in that the uprights and the secondary piles are fixed by means of fasteners or welding.
9. Pile foundation according to any one of claims 6 to 8, characterised in that,
the secondary pile is at least partially coincident with the upright.
10. Pile foundation according to any one of claims 6-8, characterised in that,
the auxiliary pile is one and is fixedly arranged on any side of the upright post.
11. Pile foundation according to any one of claims 6-8, characterised in that,
the number of the auxiliary piles is 2 or more, and any two sides or the same side of the upright post are respectively and fixedly installed.
12. Pile foundation according to any one of claims 6-8, characterised in that,
the cross sections of the upright posts and the auxiliary piles are respectively any one of H-shaped, C-shaped, I-shaped, cross-shaped, L-shaped, T-shaped or rectangular.
13. Photovoltaic support, its characterized in that includes:
pile foundation according to any one of claims 6-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310771801.7A CN116677001B (en) | 2023-06-28 | 2023-06-28 | Photovoltaic support pile foundation construction method, pile foundation and photovoltaic support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310771801.7A CN116677001B (en) | 2023-06-28 | 2023-06-28 | Photovoltaic support pile foundation construction method, pile foundation and photovoltaic support |
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| CN116677001A true CN116677001A (en) | 2023-09-01 |
| CN116677001B CN116677001B (en) | 2024-03-29 |
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| CN218868143U (en) * | 2022-12-12 | 2023-04-14 | 山东电力工程咨询院有限公司 | Multi-slope photovoltaic support structure with wind and light on same field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205212753U (en) * | 2015-11-12 | 2016-05-04 | 常州沃信能源科技有限公司 | Solar photovoltaic power station support |
| CN206683932U (en) * | 2017-03-14 | 2017-11-28 | 广东保威新能源有限公司 | A kind of drawing force testing device and the test suite for drawing force testing device |
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| Publication number | Publication date |
|---|---|
| CN116677001B (en) | 2024-03-29 |
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