Cable trench structure for booster station

Abstract

The utility model provides a cable trench structure for a booster station, which relates to the technical field of cable trenches for transformer stations and comprises a plurality of first trench bodies and a second trench body, the first trench bodies are arranged at intervals along a first direction, the trench depths of the first trench bodies are gradually increased one by one along a height direction, and the height direction is perpendicular to the first direction. All the first ditch bodies extend in the first direction; each second ditch body comprises a first butt joint part and a second butt joint part which are communicated in the second direction, included angles are formed between the second direction and the first direction and between the second direction and the height direction, and in any two adjacent first ditch bodies, one first ditch body is communicated with the first butt joint part in the second direction, and the other first ditch body is communicated with the second butt joint part in the second direction; the length s1 of the first butt joint part and the length s1 of the second butt joint part are both smaller than or equal to 300 mm. The device can adapt to the height difference change of the bottom of the cable trench, is convenient for construction, and can meet the laying requirements of various types of cable trenches for booster stations.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trenches for substations, in particular to a cable trench structure for a step-up substation. Background Art

[0002] A cable trench is the main production structure in a substation to satisfy cable laying. In related technologies, the cable trench foundation is generally formed by in-situ casting or factory prefabrication. However, since the top elevation of the cable trench cover plate in a step-up substation needs to be at the same elevation, the height difference varies greatly due to drainage slope finding and different cross-sections in the forms of road crossings, variable cross-sections, and long distances. Moreover, it is not easy to construct the one-way slope of the bottom plate of the cable trench. Therefore, it is extremely easy to cause the problem that the drainage slope cannot be achieved and the workload of secondary slope finding is large. Summary of the Invention

[0003] The utility model aims to solve at least one of the technical problems in the related technologies to a certain extent.

[0004] For this reason, an embodiment of the utility model provides a cable trench structure for a step-up substation. The cable trench structure for the step-up substation can adapt to the height difference change of the bottom of the cable trench, is convenient for construction, and can match the layout requirements of various types of cable trenches for step-up substations.

[0005] According to an embodiment of the utility model, a cable trench structure for a step-up substation includes a first trench body and a second trench body.

[0006] Wherein, there are multiple first trench bodies, and the multiple first trench bodies are arranged at intervals along a first direction. The trench depths of the multiple first trench bodies increase one by one in the height direction, and the height direction is perpendicular to the first direction. All the first trench bodies extend along the first direction;

[0007] Wherein, the second trench body includes a first docking part and a second docking part that are connected in a second direction. The second direction forms an angle with both the first direction and the height direction. Among any two adjacent first trench bodies, one of the first trench bodies is connected to the first docking part along the second direction, and the other first trench body is connected to the second docking part along the second direction. The lengths of the first docking part and the second docking part are both s1, and s1 ≤ 300 mm.

[0008] According to the cable trench structure for a booster station according to an embodiment of the present utility model, the cable trench is divided into a plurality of first trench bodies arranged along a first direction, such that the trench depths of the plurality of first trench bodies increase one by one in the height direction, and through a first docking portion and a second docking portion in a second trench body arranged at an angle with the first trench body in the first direction, rapid docking between any two adjacent first trench bodies is achieved to complete multi-section construction of the cable trench, effectively avoiding the problem that the height difference changes greatly due to drainage slope finding and different cross-sections in cable trenches in sections with passing roads, variable cross-sections, and long distances, and it is not easy to be constructed into a finished product at one time. Thus, it can match the layout requirements of various types of cable trenches for booster stations. Therefore, compared with the related art, the present utility model can adapt to the height difference change of the bottom of the cable trench, is convenient for construction, and has strong feasibility.

[0009] In some embodiments, when the length of the second trench body along the second direction is greater than 600 mm, the second trench body further includes a transition portion, and the transition portion is located between the first docking portion and the second docking portion and is coaxially connected to the first docking portion and the second docking portion;

[0010] The transition portion includes a plurality of precast modules arranged along the second direction and connected to each other.

[0011] In some embodiments, the bottom of the precast module includes a first overlapping section, a connecting section, and a second overlapping section. The connecting section has a first wall surface and a second wall surface opposite to each other along the second direction. The first overlapping section is formed on the first wall surface, and the second overlapping section is formed on the second wall surface;

[0012] In any two adjacent precast modules, the first overlapping section at the bottom of one precast module presses against the second overlapping section at the bottom of the other precast module, and a first docking seam is formed at the pressing position.

[0013] In some embodiments, the top surface of the first overlapping section is flush with the top surface of the connecting section, and the bottom surface of the second overlapping section is flush with the bottom surface of the connecting section;

[0014] The bottom surface of the first overlapping section and the top surface of the second overlapping section are on the same plane.

[0015] In some embodiments, third overlapping sections are formed on the bottom of the first docking portion and the bottom of the second docking portion. The third overlapping section presses against any one of the first overlapping section and the second overlapping section at the bottom of the adjacent precast module, and a second docking seam is formed at the pressing position.

[0016] In some embodiments, the cable trench structure for the booster station further includes a filling layer, and the filling layer is provided in each of the first docking seam and the second docking seam. The filling layer is an asphalt hemp layer.

[0017] In some embodiments, the sum of the lengths of the first overlapping section and the connecting section in the second direction is s2, where s2 ≤ 500 mm, and the lengths of both the first overlapping section and the second overlapping section in the second direction are s3, where s3 ≤ 100 mm.

[0018] In some embodiments, the cable trench structure for the booster station further includes a sump, which is formed on the bottom of the first trench body and adjacent to the lowest position of the second trench body. The lowest position of the sump is lower than the lowest position of the bottom of the first trench body in the height direction;

[0019] The sump extends in a third direction, which is perpendicular to the first direction, the second direction, and the height direction.

[0020] In some embodiments, the included angle between the plane where the bottom of the second trench body is located and the plane where the bottom of the first trench body is located is α, where α ≤ 25°.

[0021] In some embodiments, the tops of all the first trench bodies are flush with the tops of the second trench bodies;

[0022] The cable trench structure for the booster station further includes covers. There are multiple covers arranged and connected along the first direction. The covers are installed on at least one of the tops of the first trench body and the tops of the second trench body, and the covers are used to cover the first trench body and the second trench body.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view structural schematic diagram of the cable trench structure for the booster station according to an embodiment of the present utility model (the cover is not installed in the figure).

[0025] Figure 2 is a connection structural schematic diagram between the channel bottom plate of the first trench body and the channel bottom plate of the second trench body in the cable trench structure for the booster station according to an embodiment of the present utility model (the channel bottom plate of the first trench body is truncated in the figure).

[0026] Figure 3 is a structural schematic diagram of the prefabricated module in the cable trench structure for the booster station according to an embodiment of the present utility model.

[0027] Figure 4 is a cross-sectional structural schematic diagram of the cable trench structure for the booster station without a sump according to an embodiment of the present utility model (the first trench body is truncated in the figure).

[0028] Figure 5 It is a schematic cross-sectional structure diagram of a cable trench structure for a booster station according to an embodiment of the utility model when there is a sump (the first trench body is truncated in the figure).

[0029] Figure 6 It is a structural schematic diagram of a cable trench structure for a substation according to an embodiment of the utility model, in which the cable trench of a certain substation is applied to the boundary between the above-ground and underground areas and the buried depth is changed.

[0030] Figure 7 It is a structural schematic diagram of a cable trench structure for a substation according to an embodiment of the utility model, when the cable trench of a certain substation is applied to a change in the buried depth of a road section.

[0031] Figure 8 It is a structural schematic diagram of a cable trench structure for a substation according to an embodiment of the utility model, when the cable trench of a certain substation is a straight section with a changed cross-sectional height.

[0032] Figure numerals: 1. first ditch body, 2. second ditch body, 21. first docking portion, 22. second docking portion, 23. transition portion, 231. prefabricated module, 2311. first overlapping section, 2312. connecting section, 2313. second overlapping section, 232. first docking seam, 24. third overlapping section, 241. second docking seam, 3. filling layer, 4. sump, 5. cover plate. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0034] like Figure 1 and Figure 2 As shown, a cable trench structure for a booster station according to an embodiment of the utility model comprises a first trench body 1 and a second trench body 2.

[0035] There are multiple first groove bodies 1, which are arranged at intervals along the first direction, and the groove depths of the multiple first groove bodies 1 increase one by one in the height direction, the height direction is perpendicular to the first direction, and all the first groove bodies 1 extend along the first direction.

[0036] Among them, the second groove body 2 includes a first docking portion 21 and a second docking portion 22 connected along the second direction, the second direction forms an angle with the first direction and the height direction, and among any two adjacent first groove bodies 1, one of the first groove bodies 1 is connected with the first docking portion 21 along the second direction, and the other first groove body 1 is connected with the second docking portion 22 along the second direction. The lengths of the first docking portion 21 and the second docking portion 22 are both s1, s1≤300mm.

[0037] According to the cable trench structure for a step-up substation according to an embodiment of the present utility model, the cable trench is divided into a plurality of first trench bodies 1 arranged along a first direction, such that the trench depths of the plurality of first trench bodies 1 increase one by one in the height direction, and through the first docking portion 21 and the second docking portion 22 in the second trench body 2 arranged at an angle to the first trench body 1 in the first direction, rapid docking between any two adjacent first trench bodies 1 is achieved, so as to complete the multi-section construction of the cable trench, effectively avoiding the problem that the height difference changes greatly due to drainage slope finding and different cross-sections in cable trenches in the form of passing sections, variable cross-sections, and long distances, and it is not easy to be constructed into a finished product at one time. Thus, it can match the layout requirements of various types of cable trenches for step-up substations. Therefore, compared with the related art, the present utility model can adapt to the height difference change of the bottom of the cable trench, is convenient for construction, and has strong feasibility.

[0038] Specifically, the first direction can be the left-right direction in the figure. The height direction can be the up-down direction in the figure. The second trench body 2 can extend along a second direction, that is, the second trench body 2 is arranged obliquely relative to the first trench body 1, so that any two adjacent first trench bodies 1 are connected by a slope structure, saving materials and reducing costs. In the height direction, the first docking portion 21 can be located above the second docking portion 22. When the length of the second trench body 2 along the second direction is less than or equal to 600 mm, in any two adjacent first trench bodies 1, the left end of the upper first trench body 1 can be integrally formed with the first docking portion 21, and the right end of the lower first trench body 1 can be integrally formed with the second docking portion 22, so as to achieve direct docking between any two adjacent first trench bodies 1.

[0039] It should be noted that both the first trench body 1 and the second trench body 2 include a first side plate, a second side plate, and a trench bottom plate. The extending directions of the first side plate, the second side plate, and the trench bottom plate are all the extending directions of the corresponding trench body (the first trench body 1 or the second trench body 2). The first side plate and the second side plate are correspondingly arranged on the trench bottom plate and form a receiving cavity therebetween, and the receiving cavity is used for laying cables. In the height direction, the depth of the receiving cavity is the trench depth of the corresponding trench body.

[0040] As Figure 1 and Figure 2 shown, in some embodiments, when the length of the second trench body 2 along the second direction is greater than 600 mm, the second trench body 2 further includes a transition portion 23. The transition portion 23 is located between the first docking portion 21 and the second docking portion 22 and is coaxially connected to the first docking portion 21 and the second docking portion 22.

[0041] The transition portion 23 includes a plurality of prefabricated modules 231 arranged along the second direction and connected to each other.

[0042] It can be understood that when the length of the second ditch body 2 is greater than 600 mm, the second ditch body 2 is designed as a structure composed of a first docking portion 21, a transition portion 23 and a second docking portion 22, so that the second ditch body 2 can be constructed in sections, wherein the transition portion 23 adopts multiple prefabricated modules 231, which further improves the construction efficiency of the second ditch body 2, so that the second ditch body 2 can be quickly docked and completed, effectively avoiding the problem of easily extending the construction period when the second ditch body 2 is longer as a whole by using on-site casting, thereby improving construction efficiency.

[0043] It should be noted that when the second trench body 2 is long as a whole, if the on-site casting method is used for construction, it is necessary to ensure that the cast concrete solidifies before continuing the construction, so it is easy to extend the construction period. The prefabricated module 231 can be prefabricated in advance in the factory, and its quality and structural strength are guaranteed, and it is highly replaceable. In addition, the specific number of prefabricated modules 231 can be designed according to the height difference between any two adjacent first trench bodies 1 and the overall length specifications of the prefabricated modules 231, which will not be expanded here.

[0044] like Figure 2 and Figure 3 As shown, in some embodiments, the trench bottom of the prefabricated module 231 includes a first overlapping section 2311, a connecting section 2312, and a second overlapping section 2313, that is, the trench bottom plate of the prefabricated module 231 includes a first overlapping section 2311, a connecting section 2312, and a second overlapping section 2313. The connecting section 2312 has a first wall surface and a second wall surface opposite to each other along the second direction, the first overlapping section 2311 is formed on the first wall surface, and the second overlapping section 2313 is formed on the second wall surface. The first overlapping section 2311, the connecting section 2312, and the second overlapping section 2313 can all extend along the second direction and be integrally formed.

[0045] In any two adjacent prefabricated modules 231 , the first overlapping section 2311 of the groove bottom of one prefabricated module 231 is pressed against the second overlapping section 2313 of the groove bottom of the other prefabricated module 231 to form a first joint seam 232 at the pressed position.

[0046] It can be understood that the rapid splicing construction of the transition portion 23 can be completed by overlapping multiple prefabricated modules 231 in sequence, wherein the structure in which the first overlapping section 2311 and the second overlapping section 2313 are pressed against each other also ensures the connection reliability and structural strength between any two adjacent prefabricated modules 231.

[0047] It should be noted that, among any two adjacent prefabricated modules 231, the first side panel of one prefabricated module 231 is connected to the first side panel of the other prefabricated module 231 along the second direction, and the second side panel of one prefabricated module 231 is connected to the second side panel of the other prefabricated module 231 along the second direction.

[0048] likeFigure 2 and Figure 3 As shown in and

[0049] , in some embodiments, the top surface of the first overlapping section 2311 is flush with the top surface of the connecting section 2312, and the bottom surface of the second overlapping section 2313 is flush with the bottom surface of the connecting section 2312.

[0049] The bottom surface of the first overlapping section 2311 and the top surface of the second overlapping section 2313 are in the same plane.

[0050] It can be understood that designing the precast module 231 with the above structure can reduce the processing difficulty of the precast module 231, improve production efficiency. At the same time, the first overlapping section 2311 and the second overlapping section 2313 are arranged on both sides of the connecting section 2312 along the second direction and are arranged diagonally, which also ensures the structural stability of the precast module 231.

[0051] Specifically, the first overlapping section 2311 and the second overlapping section 2313 have the same thickness, that is, the distance between the top surface and the bottom surface of the first overlapping section 2311 is equal to the distance between the top surface and the bottom surface of the second overlapping section 2313. The lengths of the first overlapping section 2311 and the second overlapping section 2313 along the second direction can be equal.

[0052] As Figure 2 and Figure 3 shown in and

[0053] , in some embodiments, a third overlapping section 24 is formed on the bottom of the groove of both the first docking part 21 and the second docking part 22. The third overlapping section 24 is pressed against any one of the first overlapping section 2311 and the second overlapping section 2313 at the bottom of the groove of the adjacent precast module 231, and a second docking seam 241 is formed at the pressing position, so that the bottom of the groove of both the first docking part 21 and the second docking part 22 overlaps with the bottom of the groove of the precast module 231, realizing the rapid construction of the second trench body 2 and ensuring its structural reliability.

[0053] Specifically, the third overlapping part is formed on the wall surface of the first docking part 21 adjacent to the precast module 231, or the third overlapping part is formed on the wall surface of the second docking part 22 adjacent to the precast module 231.

[0054] As Figure 2 and Figure 3 shown in and

[0055] , in some embodiments, the cable trench structure for the booster station further includes a filling layer 3. Each of the first docking seam 232 and the second docking seam 241 is provided with the filling layer 3. The filling layer 3 is an asphalt hemp layer, so as to caulk the first docking seam 232 and the second docking seam 241 with asphalt hemp.

[0055] As Figure 3As shown, in some embodiments, the sum of the lengths of the first overlapping section 2311 and the connecting section 2312 in the second direction is s2, s2 ≤ 500 mm, and the lengths of both the first overlapping section 2311 and the second overlapping section 2313 in the second direction are s3, s3 ≤ 100 mm.

[0056] It can be understood that the first overlapping section 2311, the connecting section 2312, and the second overlapping section 2313 are designed within the above parameter ranges, which can ensure the processing efficiency of the precast module 231 and the connection strength between any two adjacent precast modules 231, while also facilitating the construction and transportation of the precast module 231.

[0057] As Figure 1 and Figure 5 shown, in some embodiments, the cable trench structure for the booster station further includes a sump 4, which is formed on the bottom of the first trench body 1 and adjacent to the lowest position of the second trench body 2. The lowest position of the sump 4 is lower than the lowest position of the bottom of the first trench body 1 in the height direction to ensure the drainage performance of the cable trench.

[0058] The sump 4 extends in a third direction, which is perpendicular to the first direction, the second direction, and the height direction. That is, the sump 4 is arranged along the direction perpendicular to the cable laying direction. Among them, the cable laying direction is the extending direction of the cable trench. Therefore, compared with the sump 4 arranged along the extending direction of the cable trench in the related art, the sump 4 of the present invention is more convenient for construction and also saves construction costs.

[0059] Specifically, the third direction can be the front-back direction in the figure.

[0060] As Figure 1 and Figure 2 shown, in some embodiments, the included angle between the plane where the bottom of the second trench body 2 is located and the plane where the bottom of the first trench body 1 is located is α, α ≤ 25°, which is convenient for the construction of the second trench body 2 and has strong feasibility. To adapt to the cable laying in the trench body (i.e., the accommodating cavity), preferably, the included angle between the plane where the bottom of the second trench body 2 is located and the plane where the bottom of the first trench body 1 is located is 25°.

[0061] As Figure 1 、 Figure 4 and Figure 5 shown, in some embodiments, the tops of all the first trench bodies 1 are flush with the tops of the second trench bodies 2, that is, the top elevations of the side plates (including the first side plate and the second side plate) of all the first trench bodies 1 and the side plates (including the first side plate and the second side plate) of the second trench bodies 2 are at the same elevation.

[0062] The cable trench structure for the step-up substation further includes a cover plate 5. There are multiple cover plates 5 arranged and connected along the first direction. The cover plate 5 is installed on at least one of the top of the first trench body and the top of the second trench body. The cover plate 5 is used to cover the first trench body and the second trench body, and the top elevation of the cover plate 5 of the cable trenches with different cross-sections in the step-up substation is controlled to be at the same elevation to meet the actual requirements.

[0063] As Figures 1 to 5 shown, the construction process of the cable trench will be described in combination with the specific structure of the cable trench as follows:

[0064] 1) Based on the general plan of the step-up substation and the electrical general layout planning drawing as the design input, determine the distribution of the above-ground and underground cable trenches. According to the cross-section and path of the above-ground cable trench, determine the specific location where the second trench body 2 needs to be set;

[0065] 2) Based on the cross-section height and length of the cable trench, clarify the buried depth of the cable trench and verify the elevation of the head and tail ends of the second trench body 2;

[0066] 3) Based on the top buried depth of the bottom plate of the cable trench channel, while keeping the local inclination angle not greater than 25°, verify the plane position length of the second trench body 2;

[0067] 4) Determine the length of the second trench body 2. When the length is within 600 mm, any two adjacent first trench bodies 1 are directly connected; when the length is more than 600 mm, the first docking part 21 and the second docking part 22 between any two adjacent first trench bodies 1 are connected by adding precast modules 231. At the same time, asphalt hemp ropes are arranged at the first docking seam 232 and the second docking seam 241 for caulking;

[0068] 5) At the second trench body 2, the height of the side walls of the cable trench (i.e., the first side plate and the second side plate) increases correspondingly with the increase of the buried depth of the channel bottom plate to ensure the unity of the top elevation of the side walls;

[0069] 6) If a sump 4 is set, a sump 4 is added at the bottom of the first trench body 1 adjacent to the lower part of the second trench body 2, and the sump 4 is perpendicular to the cable laying direction.

[0070] In addition, taking the construction drawing design of the field cable trench of a 220 kV step-up substation as an example, the method for determining the cable trench structure of the present invention is described with three different projects as examples:

[0071] For a certain step-up substation, the cable trench is at the boundary between the above-ground and underground parts. When the buried depth changes, the layout and construction of the cable trench are as Figure 6 shown;

[0072] For a certain step-up substation, when the buried depth of the cable trench changes at the road crossing section, the layout and construction of the cable trench are as Figure 7 shown;

[0073] When the cross-sectional height of a straight-section cable trench in a booster station changes, the layout construction of the cable trench is as follows Figure 8 shown

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present invention.

[0075] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0078] In the present utility model, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0079] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A cable trench structure for a booster station, characterized in that: include: a first groove body, wherein there are a plurality of the first groove bodies, the plurality of the first groove bodies are arranged at intervals along a first direction, the groove depths of the plurality of the first groove bodies increase one by one in a height direction, the height direction is perpendicular to the first direction, and all the first groove bodies extend along the first direction; and The second groove body comprises a first docking portion and a second docking portion connected along a second direction, the second direction forms an angle with the first direction and the height direction, and among any two adjacent first groove bodies, one of the first groove bodies is connected with the first docking portion along the second direction, and the other first groove body is connected with the second docking portion along the second direction, and the lengths of the first docking portion and the second docking portion are both s1, s1≤300mm.

2. The cable trench structure for a booster station according to claim 1, characterized in that: When the length of the second groove body along the second direction is greater than 600 mm, the second groove body further includes a transition portion, the transition portion is located between the first docking portion and the second docking portion and is coaxially connected to the first docking portion and the second docking portion; The transition portion includes a plurality of prefabricated modules arranged and connected along the second direction.

3. The cable trench structure for a booster station according to claim 2, characterized in that: The trench bottom of the prefabricated module comprises a first overlapping section, a connecting section and a second overlapping section, the connecting section has a first wall surface and a second wall surface opposite to each other along the second direction, the first overlapping section is formed on the first wall surface, and the second overlapping section is formed on the second wall surface; In any two adjacent prefabricated modules, the first overlapping section of the groove bottom of one prefabricated module is pressed against the second overlapping section of the groove bottom of the other prefabricated module to form a first joint seam at the pressing position.

4. The cable trench structure for a booster station according to claim 3, characterized in that: The top surface of the first overlapping section is flush with the top surface of the connecting section, and the bottom surface of the second overlapping section is flush with the bottom surface of the connecting section; The bottom surface of the first overlapping section and the top surface of the second overlapping section are on the same plane.

5. The cable trench structure for a booster station according to claim 3, characterized in that: A third overlapping section is formed on the groove bottom of the first docking portion and the groove bottom of the second docking portion, and the third overlapping section is pressed against any one of the first overlapping section and the second overlapping section of the groove bottom of the adjacent prefabricated module to form a second docking seam at the pressed position.

6. The cable trench structure for a booster station according to claim 5, characterized in that: It also includes a filling layer, each of the first butt joint and the second butt joint is provided with the filling layer, and the filling layer is an asphalt hemp layer.

7. The cable trench structure for a booster station according to any one of claims 3 to 6, characterized in that: The sum of the lengths of the first overlapping section and the connecting section along the second direction is s2, s2≤500mm, and the lengths of the first overlapping section and the second overlapping section along the second direction are both s3, s3≤100mm.

8. The cable trench structure for a booster station according to claim 1, characterized in that: It also includes a sump, which is formed on the bottom of the first ditch body and adjacent to the lowest position of the second ditch body, and the lowest position of the sump is lower than the lowest position of the bottom of the first ditch body in the height direction; The sump extends along a third direction, and the third direction is perpendicular to the first direction, the second direction and the height direction.

9. The cable trench structure for a booster station according to claim 1, characterized in that: The angle between the plane where the groove bottom of the second groove body is located and the plane where the groove bottom of the first groove body is located is α, and α≤25°.

10. The cable trench structure for a booster station according to claim 1, characterized in that: The groove tops of all the first groove bodies are flush with the groove tops of the second groove bodies; The cable trench structure for the substation also includes a cover plate, which is in plurality and arranged and connected along the first direction. The cover plate is installed on at least one of the trench tops of the first trench body and the second trench body, and is used to cover the first trench body and the second trench body.

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