High-voltage cable suspension protection device under foundation pit excavation condition

Abstract

A high-voltage cable suspension protection device under the condition of excavation of a foundation pit relates to the technical field of cable protection construction and is arranged on the foundation pit, crown beams are supported on the peripheral side of the foundation pit, supporting columns are vertically arranged at the top positions of the crown beams on the two sides of the foundation pit, and hanging rings fixedly matched with a main cable are embedded in the tops of the supporting columns. The main cable stretches across the two ends of the whole foundation pit and is fixedly connected with the hanging rings on the supporting columns on the two sides, the high-voltage cable is located under the main cable and stretches across the whole foundation pit, a plurality of hanging mooring ropes are evenly arranged on the main cable in the length direction of the main cable in a downwards-hanging mode at intervals, and the hanging mooring ropes are used for hanging the high-voltage cable. The suspension principle is similar to the stress principle of a suspension bridge, the high-voltage cable is supported by tensioning the main cable and adjusting tension, force is effectively transmitted to a supporting structure, the transmission path is simple, stress is definite, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable protection construction, in particular to a high-voltage cable suspension protection device under the condition of foundation pit excavation. Background Art

[0002] With the development of the times, people are making more and more use of underground space. However, in the process of underground space development, it is often affected by existing pipelines. In view of the requirements of the construction period, many pipelines are difficult to relocate before the start of construction. Most of them are relocated during the construction process, which inevitably causes the cross-influence of existing pipelines on the construction process of new projects. For high-voltage cables that are difficult to relocate for the time being, they must be well protected during construction. Improper handling can easily cause safety accidents. Therefore, when choosing a suitable protection plan, on the one hand, it is necessary to fully consider various factors such as construction progress, cost, and safety. On the other hand, taking protective measures will not cause additional difficulties in the relocation of cables in the later stage.

[0003] At present, overhead protection is often used in engineering projects for high-voltage cables crossing foundation pits. The specific method is to use steel columns and Bailey frames to build bridges along the cable route as cable carriers. This solution requires a large amount of steel, and it needs to be installed with the help of large lifting machinery. Overall, the economic investment is large, and the installation and disassembly process is complicated and time-consuming. Therefore, in order to solve the problem of cable protection when high-voltage cables cross foundation pits, a protection method that is both economical and convenient and fast to construct is sought while meeting the protection requirements of the cables. Utility Model Content

[0004] The utility model provides a high-voltage cable suspension protection device under the condition of foundation pit excavation to solve the above technical defects.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A high-voltage cable suspension protection device under the condition of foundation pit excavation is arranged on the foundation pit, and the surrounding sides of the foundation pit are supported by crown beams. Support columns are vertically arranged on the tops of the crown beams on both sides of the foundation pit, and the tops of the support columns are pre-buried with lifting rings for fixing with the main cable. The two ends of the main cable spanning the entire foundation pit are respectively fixedly connected to the lifting rings on the support columns on both sides. The high-voltage cable is located directly below the main cable and spans the entire foundation pit. A plurality of suspension cables are evenly spaced and suspended from the main cable along its length direction, and the suspension cables are used to suspend the high-voltage cable.

[0007] Furthermore, it also includes an inner support beam supported on the inner side of the crown beam, and a plurality of support frames are arranged on the top of the inner support beam below the high-voltage cable, and the support frames are used to support the high-voltage cable above.

[0008] Furthermore, the support frame is a steel portal frame structure, and the legs on both sides of the support frame are steel with rectangular cross-sections.

[0009] Furthermore, the high-voltage cable is protected by being wrapped by a protection box, the peripheral side of the protection box is fixed by angle steel, and the protection box is suspended by the suspension cable.

[0010] Furthermore, the size of the support column is 500mm×1000mm×3000mm, the main cable is a steel wire rope with a diameter of 20mm, and the suspension cable is a steel wire rope with a diameter of 10mm.

[0011] Furthermore, the protection box is a wooden box, and the size of the wooden box is 200mmx150mm.

[0012] Furthermore, the dimensions of the support frame are 1 m in height and 1.5 m in width.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model proposes a high-voltage cable suspension protection device under the condition of foundation pit excavation, which is provided with support columns, lifting rings, main cables and lifting ropes. A support column is constructed on each crown beam on both sides of the foundation pit, the main cable is fixed across between the support columns on both sides, and a plurality of lifting ropes are evenly suspended on the main cable along its length direction. When the high-voltage cable crosses the foundation pit, it is suspended by the plurality of lifting ropes. The suspension principle is similar to the force principle of a suspension bridge. The high-voltage cable is supported by tightening the main cable and adjusting the tension, and the force is effectively transmitted to the support structure. The transmission path is simple, the force is clear, and it is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a top view schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the support frame structure of the utility model;

[0019] Figure 4 The utility model is a structural schematic diagram of a cable suspension protection box.

[0020] In the figure: 1. foundation pit, 2. high-voltage cable, 3. crown beam, 4. inner support beam, 5. support column, 6. protection box, 7. main cable, 8. suspension cable, 9. support frame. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 1-4As shown, a high-voltage cable suspension protection device under foundation pit excavation conditions is arranged on a foundation pit 1, and the foundation pit 1 is supported by crown beams 3 on the sides thereof. Support columns 5 are vertically erected on the tops of the crown beams 3 on both sides of the foundation pit 1, and the tops of the support columns 5 are pre-buried with lifting rings for fixed cooperation with the main cables 7. The main cable 7 spans the entire foundation pit 1, and the two ends thereof are respectively fixedly connected to the lifting rings on the support columns 5 on both sides. The high-voltage cable 2 is located directly below the main cable 7 and spans the entire foundation pit 1. A plurality of lifting cables 8 are evenly spaced and suspended from the main cable 7 along its length direction, and the lifting cables 8 are used to suspend the high-voltage cable 2.

[0026] The utility model proposes a high-voltage cable suspension protection device under the condition of foundation pit excavation, which is provided with support columns 5, lifting rings, main cables 7 and lifting cables 8. A support column 5 is constructed on each of the crown beams 3 on both sides of the foundation pit 1, the main cable 7 is fixed across between the support columns 5 on both sides, and a plurality of lifting cables 8 are evenly suspended on the main cable 7 along its length direction. When the high-voltage cable 2 crosses the foundation pit 1, it is suspended by the plurality of lifting cables 8. The suspension principle is similar to the force principle of a suspension bridge. The high-voltage cable 2 is supported by tightening and adjusting the tension of the main cable 7, and the force is effectively transmitted to the supporting structure. The transmission path is simple, the force is clear, and it is safe and reliable.

[0027] Specifically, as shown in the figure, it also includes an inner support beam 4 supported on the inner side of the crown beam 3, and a plurality of support frames 9 are arranged on the top of the inner support beam 4 below the high-voltage cable 2, and the support frames 9 are used to support the upper high-voltage cable 2. The support frames 9 are steel portal frame structures, and the support legs on both sides of the support frames 9 are steel with rectangular cross-sections. The support frames 9 reduce the load pressure of the main cable.

[0028] Specifically, as shown in the figure, the high-voltage cable 2 is protected by a protection box 6 , and the surrounding sides of the protection box are fixed by angle steels to increase the rigidity of the box and prevent it from falling apart. The suspension cable 8 suspends the protection box 6 .

[0029] Specifically, as shown in the figure, the size of the support column is 500mm×1000mm×3000mm, the main cable 7 is a steel wire rope with a diameter of 20mm, and the suspension cable 8 is a steel wire rope with a diameter of 10mm.

[0030] Specifically, as shown in the figure, the protection box 6 is a wooden box, and the size of the wooden box is 200mmx150mm.

[0031] Specifically, as shown in the figure, the size of the support frame 9 is 1 m in height and 1.5 m in width.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-voltage cable suspension protection device under foundation pit excavation conditions, arranged on a foundation pit (1), wherein the foundation pit (1) is supported by a crown beam (3) on its circumference, characterized in that: Support columns (5) are vertically arranged at the top of the crown beams (3) on both sides of the foundation pit (1). The tops of the support columns (5) are pre-buried with lifting rings for fixing with the main cables (7). The two ends of the main cables (7) spanning the entire foundation pit (1) are respectively fixedly connected to the lifting rings on the support columns (5) on both sides. The high-voltage cable (2) is located directly below the main cable (7) and spans the entire foundation pit (1). A plurality of lifting cables (8) are evenly spaced and suspended from the main cable (7) along its length direction. The lifting cables (8) are used to suspend the high-voltage cable (2).

2. The high-voltage cable suspension protection device under foundation pit excavation conditions according to claim 1 is characterized in that: It also includes an inner support beam (4) supported and arranged on the inner side of the crown beam (3), and a plurality of support frames (9) are arranged on the top of the inner support beam (4) below the high-voltage cable (2), and the support frames (9) are used to support the high-voltage cable (2) above.

3. The high-voltage cable suspension protection device under foundation pit excavation conditions according to claim 2 is characterized in that: The support frame (9) is a steel portal frame structure, and the supporting legs on both sides of the support frame (9) are steel with rectangular cross-sections.

4. The high-voltage cable suspension protection device under foundation pit excavation conditions according to claim 3 is characterized in that: The high-voltage cable (2) is protected by being wrapped by a protection box (6), the periphery of the protection box is fixed by angle steel, and the suspension cable (8) suspends the protection box (6).

5. The high-voltage cable suspension protection device under foundation pit excavation condition according to claim 4 is characterized in that: The dimensions of the support column are 500mm×1000mm×3000mm, the main cable (7) is a steel wire rope with a diameter of 20mm, and the suspension cable (8) is a steel wire rope with a diameter of 10mm.

6. A high-voltage cable suspension protection device under foundation pit excavation conditions according to claim 4, characterized in that: The protection box (6) is a wooden box, and the size of the wooden box is 200mmx150mm.

7. The high-voltage cable suspension protection device under foundation pit excavation conditions according to claim 4 is characterized in that: The dimensions of the support frame (9) are 1 m in height and 1.5 m in width.

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