Plug-in type foundation of power transformation framework steel pipe column

Abstract

The utility model relates to the technical field of power transformation framework foundations, in particular to a power transformation framework steel pipe column insertion type foundation. The plug-in foundation comprises a framework foundation arranged above the cushion layer, and a cup opening is formed in the framework foundation; a plurality of embedded anchor bolts are arranged in the framework foundation, and two semicircular ring plates are symmetrically mounted on the framework foundation through the embedded anchor bolts; self-compacting concrete used for wrapping the root of the connecting framework steel pipe column is poured in the cup opening. The problem that a framework steel pipe column and concrete in a cup opening can be pulled out together is solved, a framework foundation and a semicircular annular plate can be connected through pre-embedded anchor bolts, and through cooperation of arrangement of an inner transverse partition plate, chiseling of the inner wall of the cup opening, arrangement of an anti-shear stud, welding of a steel bar ring and pouring of self-compacting concrete, the structure is simple, and construction is convenient. The function that the framework steel pipe column, the concrete in the cup opening and the framework foundation are stressed cooperatively can be achieved, the framework steel pipe column can be prevented from sliding, the risk that the framework steel pipe column is pulled out is reduced, and the safety of the column base joint is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power transformation framework foundation technical field, concretely relates to a power transformation framework steel pipe column insertion type foundation. BACKGROUND

[0002] The power transformation framework plays an important role in suspending conductor and supporting conductor, and the power transformation framework structure is classified according to material and structure type, wherein the welded ordinary steel pipe structure is commonly used in conventional power transformation station design, and its processing technology is mature and convenient for construction.

[0003] The power transformation framework stress is mainly horizontal load, and the conductor and ground wire tension are the main horizontal load, which is influenced by multiple factors such as conductor span, sag, self weight and icing thickness, and is different under different weather conditions. The power transformation framework foundation type needs to be determined by comprehensively considering engineering geology, hydrogeology, load property, material, construction condition and cost, and the concrete rigid foundation and rigid fixed column foot should be preferentially used.

[0004] However, in some high-voltage level outgoing line framework, such as 750kV outgoing line framework, the first base tower span is large and single-sided wire hanging when the foundation uplift and overturning stability calculation is carried out and meets the requirements, but there is still a risk that the framework steel pipe column is pulled out of the framework foundation by external force, that is, the power transformation framework steel pipe column and the concrete in the cup opening are pulled out of the framework foundation together, and the structural stability is poor. Therefore, the problem that the power transformation framework steel pipe column and the concrete in the cup opening are pulled out together needs to be solved, the stability and reliability of the power transformation framework foundation need to be improved, and the safe and stable operation of the power transformation station needs to be ensured. In view of this, a power transformation framework steel pipe column insertion type foundation is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the insufficient mentioned in the above background technical field, and provides a power transformation framework steel pipe column insertion type foundation.

[0006] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0007] A power transformation framework steel pipe column insertion type foundation, the insertion type foundation includes the framework foundation arranged above the cushion layer, and the cup opening for inserting the framework steel pipe column is arranged on the framework foundation;

[0008] The framework foundation is internally provided with a plurality of uniformly distributed pre-buried anchor bolts, and two semicircular ring plates are symmetrically installed on the framework foundation through the pre-buried anchor bolts, and the two semicircular ring plates are used for fixing and clamping the framework steel pipe column;

[0009] The self-compacting concrete for covering and connecting the root of the framework steel pipe column is poured in the cup opening.

[0010] Preferably, a plurality of uniformly distributed stiffening rib plates are connected to the semicircular ring plates, and full penetration welding is used between the two semicircular ring plates.

[0011] Preferably, a concrete protective layer is arranged above the framework foundation to cover the semicircular ring plates and the stiffening rib plates.

[0012] Preferably, a concrete protective cap is arranged on the concrete protective layer to cover the framework steel pipe column.

[0013] Preferably, the concrete protective cap adopts a regular hexagonal structure, and the concrete protective cap is arranged to be higher than the site elevation by 120-150 mm.

[0014] Preferably, an annular positioning steel plate is arranged on the framework steel pipe column and located at the lower side of the semicircular ring plate, and the annular positioning steel plate is used to resist the semicircular ring plate from below to play a role of anti-pulling.

[0015] Preferably, an inner transverse partition plate is arranged inside the framework steel pipe column and corresponds to the position of the semicircular ring plate.

[0016] Preferably, the thickness of the inner transverse partition plate is not less than the thickness of the semicircular ring plate.

[0017] Preferably, the inner wall of the cup mouth is roughened, and the surface of the framework steel pipe column inside the cup mouth is provided with equidistantly distributed shear bolts and welded steel rings.

[0018] Preferably, the distance between adjacent welded steel rings is 100-200 mm.

[0019] The shear bolts are vertically arranged about the axis of the framework steel pipe column, and a plurality of shear bolts are uniformly distributed along the surface of the framework steel pipe column at an angle of 15°-45°.

[0020] Therefore, the problem of the substation framework steel pipe column and the concrete in the cup mouth being pulled out together needs to be solved, and the stability and reliability of the substation framework foundation need to be improved to ensure the safe and stable operation of the substation;

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] The embedded anchor bolt can connect the framework foundation and the semicircular ring plate, set the inner transverse partition plate, roughen the inner wall of the cup, set the shear bolt, weld the steel reinforcement ring and pour the self-compacting concrete, so that the framework steel pipe column, the concrete in the cup and the framework foundation can be in cooperative stress, the slip of the framework steel pipe column can be prevented, the risk of being pulled out can be reduced and the safety of the column foot joint can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a top view of the framework foundation of the present application;

[0025] Figure 2 It is A1-A2 sectional view of embodiment 1 of the present application;

[0026] Figure 3 It is B1-B2 sectional view of embodiment 1 of the present application;

[0027] Figure 4 It is C1-C2 sectional view of the present application Figure 2 and Figure 3 ;

[0028] Figure 5 It is D1-D2 sectional view of the present application Figure 2 and Figure 3 ;

[0029] Figure 6 It is A1-A2 sectional view of embodiment 2 of the present application;

[0030] Figure 7 It is B1-B2 sectional view of embodiment 2 of the present application.

[0031] The meanings of various reference numerals in the drawings are as follows:

[0032] 1, framework steel pipe column; 2, framework foundation; 21, cup; 3, semicircular ring plate; 4, inner transverse partition plate; 5, embedded anchor bolt; 6, shear bolt; 7, welded steel reinforcement ring; 8, stiffening rib plate; 9, concrete protective layer; 10, concrete protective cap; 11, cushion layer; 12, annular positioning steel plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0034] Please refer to Figures 1-7 The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0035] Embodiment 1

[0036] The substation framework steel pipe column insertion type foundation of the embodiment, the insertion type foundation includes the framework foundation 2 as shown in Figure 2 and Figure 3 The cushion layer 11 is a deep excavation bottom concrete leveling layer in the embodiment, and the structure main body part is below the site elevation, and deep burying construction is carried out during construction, so that the stable foundation structure is obtained; in order to provide the insertion site of the fixed framework steel pipe column 1, the cup mouth 21 for inserting the framework steel pipe column 1 is arranged on the framework foundation 2 in the embodiment, and the self-compacting concrete for covering and connecting the root of the framework steel pipe column 1 is poured in the cup mouth 21, and the inner wall of the cup mouth 21 is chiseled and roughened in order to improve the connectivity.

[0037] Specifically, as shown in the structure, Figures 1-3 The concrete of the embodiment is poured to form the framework foundation 2, and eight evenly distributed embedded anchors 5 are arranged in the framework foundation 2 as shown in Figure 5 When the framework steel pipe column 1 is subjected to tension, the embedded anchors 5 can transmit the column bottom bending moment and shear force, so that the framework steel pipe column 1, the concrete in the cup mouth 21 and the framework foundation 2 are connected as a whole and cooperatively stressed; two semicircular ring plates 3 are symmetrically installed on the framework foundation 2 through the embedded anchors 5, so that the semicircular ring plate 3 and the framework foundation 2 form a whole; it should be noted that, in order to facilitate the installation of the framework steel pipe column 1, the two semicircular ring plates 3 need to be fully penetrated welded after installation, which is used for fixing and clamping the framework steel pipe column 1, and a plurality of evenly distributed stiffened rib plates 8 as shown in Figure 5 are connected to the semicircular ring plate 3 in order to improve the structural strength of the semicircular ring plate 3.

[0038] It should be noted that, in order to further improve the installation stability of the structural steel pipe column 1, that is, to prevent the self-compacting concrete inside the connecting cup 21 of the structural steel pipe column 1 from being pulled out of the cup 21, the effect of only having a sealed semi-circular ring plate 3 is limited, and it is easy to cause structural collapse under stress. Therefore, in this embodiment, before welding the semi-circular ring plate 3, the structural steel pipe column 1 needs to be placed into the cup 21 first, and an annular positioning steel plate 12 is pre-welded to the underside of the structural steel pipe column 1 where it is located. The setting of the annular positioning steel plate 12 can play a positioning role, which facilitates the hoisting of the structural steel pipe column 1 and can limit its insertion depth. At the same time, the annular positioning steel plate 12 can resist the pull-out by abutting the semi-circular ring plate 3 from bottom to top. In addition, in order to prevent the semi-circular ring plate 3 or the structural steel pipe column 1 from collapsing, an inner transverse diaphragm 4 corresponding to the position of the semi-circular ring plate 3 is provided inside the structural steel pipe column 1, and the thickness of the inner transverse diaphragm 4 is not less than the thickness of the semi-circular ring plate 3.

[0039] To improve the structural connection between the frame steel pipe column 1 and the self-compacting concrete, and thus improve the pull-out resistance, shear studs 6 and welded reinforcing rings 7 are provided at equal intervals on the surface of the frame steel pipe column 1 located inside the cup opening 21. In this embodiment, the spacing between adjacent welded reinforcing rings 7 is set to 150mm; and as... Figure 2 The structure shown features shear studs 6 perpendicular to the axis of the frame steel pipe column 1. In this embodiment, the shear studs 6 are evenly distributed at a 45° angle along the surface of the frame steel pipe column 1. Other embodiments may use 15°, 20°, or 30° angles to increase the number of shear studs 6 in a single ring on the frame steel pipe column. When the frame steel pipe column 1 is subjected to external stress, the shear studs 6 and the welded reinforcing rings 7 can transfer the shear force at the column base, increasing the connection force between the frame steel pipe column 1 and the concrete in the cup 21, and between the concrete in the cup 21 and the frame foundation 2. This avoids the risk of the frame steel pipe column 1 and the concrete in the cup 21 being pulled out simultaneously. The cup 21 is filled with self-compacting concrete, which ensures the fluidity and quality of the pouring. Self-compacting concrete is a mature technology in the construction field, mainly because it can achieve a dense molding quality. Different strengths have different mature formulas, so they will not be described in detail. In this embodiment, C40 strength concrete is used for construction.

[0040] To improve the overall connection between the semi-circular ring plate 3 and the frame foundation 2, after the semi-circular ring plate 3 is installed with the pre-embedded anchor bolts 5, a concrete protective layer 9 covering the stiffening rib plate 8 is poured on the plane of the frame foundation 2. A regular hexagonal concrete protective cap 10 is set at the junction of the frame steel pipe column 1 and the site ground. The concrete protective layer 9 and the concrete protective cap 10 can cover the frame steel pipe column 1 again, providing a support covering point. The concrete protective layer 9 and the concrete protective cap 10 can also meet the anti-corrosion requirements of the frame steel pipe column 1, the pre-embedded anchor bolts 5, and the stiffening rib plate 8, which can extend the maintenance cycle.

[0041] The substation framework steel pipe column plug-in foundation of the embodiment firstly pre-fabricates the framework steel pipe column 1, the semi-circular ring plate 3 welded with the stiffening rib plate 8 and other components, pours the cushion 11 to the foundation bottom elevation after deep excavation of the foundation pit, then supports the mold and pours the framework foundation 2, and simultaneously puts the embedded anchor bolt 5 to form together; after the framework foundation 2 is cured and qualified, the cup mouth 21 is chiseled, then the framework steel pipe column 1 welded with the annular positioning steel plate 12 is hoisted and installed into the cup mouth 21, the cup mouth 21 is poured with self-compacting concrete, the semi-circular ring plate 3 is installed and welded, and the formed structure as shown in Figure 2 and Figure 3 is formed, and then the concrete protection layer 9 and the concrete protection cap 10 are poured to the site elevation height above the framework foundation 2, and after the forming, the framework steel pipe column 1 has better pull-out resistance, the overall foundation structure forms an entirety, and the problem that the framework steel pipe column 1 is pulled out with the concrete in the cup mouth 21 can be avoided.

[0042] It should be noted that the framework steel pipe column 1, the semi-circular ring plate 3 welded with the stiffening rib plate 8, the embedded anchor bolt 5, the shear bolt 6, the welded steel bar ring 7 and the annular positioning steel plate 12 in the embodiment can be pre-welded, welding quality has less discreteness when welding on site during construction, construction quality is ensured, construction efficiency is improved, construction period is shortened, and on-site implementation has higher operability; the embodiment is applicable to the case that the framework steel pipe column 1 has a large diameter and can enter the inside transverse partition plate 4 welded by workers, for example, when the inside pipe diameter is greater than 700 mm.

[0043] Embodiment 2

[0044] As shown in the structures of Figure 6 and Figure 7 , the difference between the embodiment and the embodiment 1 is that a hole for pouring self-compacting concrete is formed in the framework steel pipe column 1 in the embodiment, and the self-compacting concrete in the framework steel pipe column 1 can replace the inside transverse partition plate 4 after the self-compacting concrete is formed and qualified;

[0045] It should be noted that the embodiment is applicable to the case that the framework steel pipe column 1 has a small diameter and cannot enter the inside transverse partition plate 4 welded by workers, for example, when the inside pipe diameter is less than 700 mm; of course, in the embodiment 1, the framework steel pipe column 1 with an inside pipe diameter greater than 700 mm can also pour self-compacting concrete to replace the inside transverse partition plate 4, and the corresponding implementation method is selected according to the specific situation during construction.

[0046] It should be noted that if the embodiment of the utility model relates to a directional indication (such as up, down, left, right, front, back, …), the directional indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, and if the specific posture changes, the directional indication also changes accordingly.

[0047] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0048] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A substructure for a steel pipe column of a power transformer, characterized in that: The insert type foundation comprises a framework foundation (2) arranged above a cushion layer (11), and a cup mouth (21) is arranged on the framework foundation (2) for inserting a framework steel pipe column (1); A plurality of uniformly distributed pre-buried anchors (5) are arranged in the framework foundation (2), and two semicircular ring plates (3) are symmetrically arranged on the framework foundation (2) through the pre-buried anchors (5), and the two semicircular ring plates (3) are used for fixing and clamping the framework steel pipe column (1); The cup mouth (21) is poured with self-compacting concrete for covering and connecting the root of the framework steel pipe column (1).

2. The substation steel pipe column plug-in foundation according to claim 1, characterized in that: A plurality of uniformly distributed stiffening rib plates (8) are connected to the semicircular ring plates (3), and full penetration welding is adopted between the two semicircular ring plates (3).

3. The substation steel pipe column plug-in foundation according to claim 2, wherein: A concrete protective layer (9) is arranged above the framework foundation (2) for covering the semicircular ring plates (3) and the stiffening rib plates (8).

4. The substation steel pipe column plug-in foundation according to claim 3, wherein: A concrete protective cap (10) is arranged on the concrete protective layer (9) for covering the framework steel pipe column (1).

5. The substation steel pipe column plug-in foundation according to claim 4, wherein: The concrete protective cap (10) adopts a regular hexagonal structure, and the concrete protective cap (10) is arranged to be higher than the site elevation by 120-150 mm.

6. The substation steel pipe column plug-in foundation according to claim 2, wherein: An annular positioning steel plate (12) is arranged on the framework steel pipe column (1) and located below the semicircular ring plate (3), and the annular positioning steel plate (12) is used for resisting the semicircular ring plate (3) from below to above to play a role of resisting uplift.

7. The substation steel pipe column plug-in foundation according to claim 6, wherein: An inner cross partition plate (4) corresponding to the position of the semicircular ring plate (3) is arranged in the framework steel pipe column (1).

8. The substation steel pipe column plug-in foundation according to claim 7, wherein: The thickness of the inner cross partition plate (4) is not less than the thickness of the semicircular ring plate (3).

9. The substation steel pipe column plug-in foundation according to claim 1 or 8, characterized in that: The inner wall of the cup mouth (21) is roughened, and the surface of the framework steel pipe column (1) inside the cup mouth (21) is provided with equidistantly distributed shear bolts (6) and welded steel reinforcement rings (7).

10. The substation steel pipe column plug-in foundation according to claim 9, wherein: The distance between adjacent welded steel reinforcement rings (7) is 100-200 mm; The shear bolts (6) are arranged vertically about the axis of the framework steel pipe column (1), and a plurality of shear bolts (6) are uniformly distributed at an angle of 15°-45° along the surface of the framework steel pipe column (1).

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