Communication cable / power cable box structure for trenching of aerial utility cable, and construction method for the same

Abstract

A communication line / power line box structure for undergrounding overhead lines and a construction method thereof are provided, which minimize the excavation surface of roads or sidewalks and enable efficient management of additional burial or service entrance lines by installing above-ground communication lines and power lines in an underground dedicated communication line / power line box; furthermore, by using a precast box-type structure, additional lines can be installed without re-excavation when burying communication lines or power lines, and maintenance costs can be reduced by allowing visual inspection without excavation during maintenance.

Description

Technology Field

[0001] The present invention relates to a box structure for undergrounding overhead cables, and more specifically, to a communication cable / power cable box structure for undergrounding overhead cables and a method of constructing the same, which installs above-ground communication cables and power cables in an underground dedicated communication cable / power cable box to minimize the excavation surface of roads or sidewalks and to efficiently perform additional burial or service line management. Background Technology

[0002] Conventional maintenance methods for communication and power lines have involved excavation and burial or the use of underground conduits to house the wires.

[0003] This method can damage roads and increase waste generation by excavating roads or sidewalks for the installation of communication / power lines, and can also increase citizen inconvenience due to traffic control.

[0004] This conduit system has limitations in its full-scale application during the maintenance of communication and power lines because it is difficult to bury cables in narrow roads and incurs increased costs.

[0005] Accordingly, as a method for burying communication / power lines installed on above-ground utility poles underground, techniques are being used in which the road is excavated, the communication / power lines are buried and backfilled, and then paved, or in which the road is excavated on a small scale using a mini-trenching technique to bury the communication lines and then backfilled.

[0006] However, the mini-trenching method based on conventional technology can only bury a portion of communication lines underground due to the small cross-section, and the problem of having to re-excavate for additional construction arises because the backfilling of the excavated cross-section is required.

[0007] In addition, conventional conduit systems have the problem that they are difficult to install in narrow roads and increase construction costs.

[0008] Meanwhile, Fig. 1 is a cross-sectional view of the construction of communication lines / power lines through road excavation according to conventional technology.

[0009] Referring to FIG. 1, in the case of a communication line / power line through road excavation according to conventional technology, the road (11) is excavated and sand (14) is laid and the communication line / power line (15) is installed, and then, by forming an auxiliary base layer (12) and an asphalt layer (13) on top thereof, the communication line / power line can be buried.

[0010] Meanwhile, Fig. 2 is a cross-sectional view of a communication line construction through conventional micro / mini trenching.

[0011] As shown in Fig. 2, the micro / mini trenching method is a construction method that allows for restoration or recovery in a short time by cutting a narrow width of the road surface.

[0012] These micro / mini trenching methods are fast and generate significantly less waste compared to conventional construction methods.

[0013] At this time, sufficient strength and network reliability can be secured by applying appropriate reinforcement, such as concrete filling, to the buried microducts.

[0014] The depth of these micro / mini trenches varies according to the regulations or laws of each country, and the trench width is mainly determined by the size of the micro-duct and can be formed in various sizes from 10 mm to 150 mm.

[0015] Specifically, the micro-trenching shown on the left side of Fig. 2 is also called slot trenching and is a method used to excavate hard surfaces such as roads and sidewalks.

[0016] Micro ducts, which are pipes used for this purpose, are generally buried after digging a shallow and narrow hole with a width of about 10 mm to 30 mm and a depth of 150 mm to 300 mm.

[0017] In addition, the mini trenching shown on the right side of Fig. 2 is a method for burying pipelines by reducing the excavation width and depth compared to general excavation and restoration work.

[0018] Since such mini-trenching involves a smaller pipe burial depth compared to general excavation and restoration work, it can have a relatively greater impact on the behavior of the road pavement, which can be a factor in reducing the road pavement's serviceability.

[0019] Meanwhile, as prior art related to the construction of underground buried pipelines, Korean registered patent number 10-1049061 discloses an invention titled "Functional underground pipeline multi-protector and method of constructing an underground buried pipeline using the same," which will be explained with reference to FIG. 3.

[0020] Figure 3 is a cross-sectional view showing the embankment process in a construction method of an underground buried pipeline using a functional underground pipeline multi-protector according to conventional technology.

[0021] A construction method for an underground buried pipeline using a functional underground pipeline multi-protector according to conventional technology is carried out by sequentially performing the processes of excavation, installation of the underground pipeline, embankment, installation of the multi-protector, connection of the signal capsule, and backfilling. In particular, as shown in FIG. 3, an embankment layer (23) is formed on top of the installed underground pipeline (22).

[0022] At this time, the embankment layer (23) is formed by piling up sand to a certain thickness to protect the installed underground conduits (24) such as electrical and communication cables, gas and water supply, etc., and to install a multi-protector (21) on top, so that a safe separation distance is maintained between the underground conduit (22) and the multi-protector (21).

[0023] Here, the multi-protector is composed of reinforced concrete material with internal reinforcing bars to enhance its strength, and is configured, for example, in the shape of a plate-type block having a rectangular shape and a thickness capable of withstanding external forces.

[0024] According to a functional underground pipeline multi-protector based on conventional technology, the burial status of the underground pipeline can be easily detected by a marker prior to excavation work.

[0025] In addition, the multi-protector, composed of high-strength reinforced concrete, prevents damage to the underground pipeline even if the bucket comes into contact with it during excavation, thereby preventing external damage to the underground pipeline. At the same time, the danger detection signal from the signal capsule allows the excavator operator to easily and reliably identify the presence of buried underground pipelines, such as electrical and communication cables, as well as gas and water pipes, during excavation.

[0026] In addition, since it has a structure that allows for vertical, horizontal, and overlapping arrangement, it has a multi-functional capability that enables easy connection and arrangement regardless of the number of underground pipes, thereby further enhancing efficiency.

[0027] However, the construction method of a functional underground pipeline multi-protector based on conventional technology has a limitation in that it cannot efficiently perform additional burial or service line management, as it involves directly installing the underground pipeline after excavation.

[0028] Meanwhile, as another prior art, Korean Patent Publication No. 2021-51785 discloses an invention titled "Prefabricated cable trough and method of construction thereof," which will be explained with reference to FIG. 4.

[0029] FIG. 4 is a cross-sectional view showing a prefabricated cable trough according to conventional technology buried underground.

[0030] Referring to FIG. 4, a prefabricated cable trough according to the prior art is configured to include a retaining wall panel (31), a spacing panel (32), and a roof panel (33).

[0031] A pair of retaining wall panels (31) are spaced apart in the excavation groove where the cable (34) is laid. These retaining wall panels (31) are formed in a flat plate shape with a certain size and are placed on the inner side of the excavation groove to serve as supports that prevent the collapse of the excavation groove.

[0032] A plurality of spacing panels (32) are provided between the retaining wall panels (31) to maintain the spacing of the retaining wall panels (31). These spacing panels (32) are formed in a flat shape with a certain size, thereby serving to guide the retaining wall panels (31) to maintain a state of close contact with the inner surface of the excavation groove.

[0033] The roof panel (32) is seated on the retaining wall panel (31) to protect the cable (34) from external impact. This roof panel (33) is formed in a flat shape with a certain size and serves to finish the upper side of the retaining wall panel (31).

[0034] According to the prefabricated cable trough according to the conventional technology, the structure is such that the retaining wall panels are placed in close contact with the inner surface of the excavation groove by means of spacing panels, and then the roof panels are installed after backfilling the space between the retaining wall panels. This improves compaction workability, thereby preventing ground subsidence and also preventing the temperature rise of the cables laid in the excavation groove.

[0035] Meanwhile, as prior art related to the aforementioned mini trench, Korean published patent number 2023-68626 discloses an invention titled "structure for burying a national line protection steel pipe along a roadside," which will be explained with reference to FIG. 5.

[0036] FIG. 5 is a cross-sectional view showing that a roadside public line protection pipe according to conventional technology is connected to an incoming utility pole, a crossing public line protection pipe, and a user communication manhole.

[0037] Referring to FIG. 5, the burial structure of a roadside national line protection pipe according to the prior art is formed by excavating a roadside mini trench (43) along the boundary line of a boundary stone (41) and a drainage side ditch (42) located at the roadside land boundary line where the end of a user national line inlet pipe or a business operator's cross national line protection pipe (44) extending from a user communication manhole (45) is located, up to the side of an inlet pole (47).

[0038] In addition, a steel pipe (44) for national line protection, which has excellent resistance to impact and load even when directly exposed to the outside, is placed inside the mini trench (43).

[0039] Additionally, the first end located on the side of the incoming utility pole (47) is connected to the utility pole riser pipe and the other end located at the roadside land boundary line through a connecting means to the user national line incoming pipe or the business operator's cross-national line protection pipe (44), and after placing the business operator's roadside national line protection pipe, the mini trench (43) is restored to its original state and constructed.

[0040] At this time, the roadside national line inlet pipe may be buried from the inlet pole (47) installed on the opposite roadside to the lower part of the boundary stone located on the opposite roadside land boundary line, but the roadside national line inlet pipe may also be buried from the inlet pole (47) installed on the same roadside to the lower part of the boundary stone located on the same roadside land boundary line.

[0041] According to the burial structure of a roadside national line protection pipe based on conventional technology, the burial work for a business operator's roadside national line protection pipe can be easily performed by minimizing the excavation and restoration work required to bury the business operator's roadside national line protection pipe from the roadside property boundary line, where the end of the user national line inlet pipe extended from the user communication manhole or the business operator's crossing national line protection pipe is located, to the inlet pole.

[0042] As mentioned above, existing methods for burying communication and power lines involve road excavation, which increases road damage and waste generation, and increases citizen inconvenience due to traffic control. Additionally, the mini-trenching method can only bury a portion of the communication lines underground due to the small cross-section, and there is a problem that re-excavation is required for additional construction due to backfilling of the excavated cross-section. Prior art literature

[0043] Republic of Korea Registered Patent No. 10-1049061 (Registration Date: July 7, 2011), Title of Invention: "Functional Underground Conduit Multi-Protector and Method for Constructing Underground Buried Conduit Using the Same" Republic of Korea Published Patent No. 2019-36303 (Publication Date: April 4, 2019), Title of Invention: "Underground Conduit Power Cable Protection Structure and Method for Constructing Underground Conduit Power Cable Using the Same" Republic of Korea Published Patent No. 2021-51785 (Publication Date: May 10, 2021), Title of Invention: "Prefabricated Cable Trough and Method for Constructing the Same" Republic of Korea Published Patent No. 2021-94284 (Publication Date: July 29, 2021), Title of Invention: "Method for Installing Roadside National Line Inlet Pipeline" Republic of Korea Published Patent No. No. 2023-68626 (Publication Date: May 18, 2023), Title of Invention: "Buried Structure of Roadside National Line Protection Steel Pipe" The problem to be solved

[0044] The technical objective of the present invention, which aims to solve the aforementioned problems, is to provide a communication line / power line box structure for undergrounding overhead lines and a method for constructing the same, which minimizes the excavation surface of roads or sidewalks by installing above-ground communication lines and power lines in an underground dedicated communication line / power line box, and enables additional burial or management of service lines.

[0045] Another technical objective of the present invention is to provide a communication line / power line box structure for undergrounding overhead lines and a method for constructing the same, which enables additional installation of communication or power lines without re-excavation by using a precast box-type structure, allows for visual inspection without excavation during maintenance, and reduces maintenance costs. means of solving the problem

[0046] As a means to achieve the aforementioned technical problem, a communication line / power line box structure for undergrounding an aerial line according to the present invention comprises: a communication line / power line box structure installed by burying for undergrounding an aerial line, wherein the communication line and power line are installed separately in a dedicated box, and the communication line / power line box body is buried in an excavated surface of the ground to install the communication line and power line underground; a communication line / power line box cover disposed on the upper surface of the communication line / power line box body; an inspection box connected in the longitudinal direction of the communication line / power line box body as a manhole for inspecting the communication line / power line; and an inspection opening disposed on the upper part of the inspection box as a manhole cover. It is divided into power line ducts and communication line ducts, and includes communication line / power line ducts installed inside the communication line / power line box body, wherein communication lines and power lines are respectively installed therein. The communication line / power line box body is installed by extending it in a prefabricated manner in the longitudinal direction on the bottom surface formed by excavating a road or sidewalk. The communication line / power line box body is formed in a U-shape using concrete or recycled plastic in a precast manner. A cover connection groove is formed on the inner upper side of the communication line / power line box body so that the communication line / power line box cover can be seated thereon. The inspection box is formed so that its bottom surface is seated on the upper surface of the lower portion of the two stepped blocks formed on the connection end surface of the communication line / power line box body, and its two sides are positioned by being accommodated by the upper portion of the two stepped blocks, thereby being arranged and connected in the longitudinal direction of the communication line / power line box body.

[0047] delete

[0048] Meanwhile, as another means for achieving the aforementioned technical problem, the construction method of a communication line / power line box structure for undergrounding an aerial line according to the present invention comprises: a) a step of excavating the ground to a predetermined depth for a construction surface for forming a communication line / power line box structure; b) a step of laying a foundation of a fluid filler on the bottom surface where the ground has been excavated; c) a step of installing a communication line / power line box body on the foundation of the fluid filler; d) a step of installing a communication line / power line duct inside the communication line / power line box body; e) a step of installing a communication line / power line box cover on the communication line / power line box body; and f) a step of completing the communication line / power line box structure by backfilling the side of the communication line / power line box body with a lateral fluid filler. Effects of the invention

[0049] According to the present invention, by installing above-ground communication lines and power lines in an underground dedicated box for communication lines / power lines, the excavation surface of roads or sidewalks can be minimized, and additional burial or management of service lines can be performed efficiently.

[0050] According to the present invention, by using a precast box-type structure, additional burial of communication or power lines is possible without re-excavation, and furthermore, visual inspection is possible without excavation during maintenance, thereby reducing maintenance costs. Brief explanation of the drawing

[0051] Figure 1 is a cross-sectional view of the construction of communication lines / power lines through road excavation according to conventional technology. Figure 2 is a cross-sectional view of a communication line construction through conventional micro / mini trenching. Figure 3 is a cross-sectional view showing the embankment process in a construction method of an underground buried pipeline using a functional underground pipeline multi-protector according to conventional technology. FIG. 4 is a cross-sectional view showing a prefabricated cable trough according to conventional technology buried underground. FIG. 5 is a cross-sectional view showing that a roadside public line protection pipe according to conventional technology is connected to an incoming utility pole, a crossing public line protection pipe, and a user communication manhole. FIG. 6 is a perspective view showing a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention. FIG. 7 is a perspective view showing an exposed communication line / power line box structure as a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention. FIG. 8 is a perspective view showing an asphalt-paved embedded communication line / power line box structure as a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention. FIG. 9 is a drawing illustrating various forms of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention. FIG. 10 is a flowchart illustrating a construction method for a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention. FIGS. 11a, FIGS. 11b, FIGS. 11c, FIGS. 11d, FIGS. 11e, and FIGS. 11f are cross-sectional views specifically illustrating a construction method of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention. FIGS. 12a and FIGS. 12b are cross-sectional views illustrating the case where a construction method for a communication line / power line box structure for undergrounding an overhead line according to an embodiment of the present invention is applied to an asphalt pavement. Specific details for implementing the invention

[0052] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0053] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0054] Hereinafter, a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention will be described with reference to FIGS. 6 to 9.

[0055] A construction method for a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention will be described with reference to FIGS. 10 to 12.

[0056] [Communication line / power line box structure for undergrounding overhead lines (100)]

[0057] FIG. 6 is a perspective view showing a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention.

[0058] Referring to FIG. 6, a communication line / power line box structure (100) for undergrounding an aerial line according to an embodiment of the present invention is a communication line / power line box structure installed by burying it for undergrounding an aerial line, and is composed of a communication line / power line box body (110), a communication line / power line box cover (120), an inspection box (130), an inspection port (140), and a communication line / power line duct (150).

[0059] Additionally, asphalt paving (160) may be additionally constructed on the communication line / power line box structure (100) as needed.

[0060] The communication line / power line box structure (100) for undergrounding an aerial line according to an embodiment of the present invention may be an exposed (open) communication line / power line box structure (100a) as shown in FIG. 7 described later, or an asphalt-paved buried communication line / power line box structure (100b) as shown in FIG. 8 described later.

[0061] The communication line / power line box body (110) is a precast dedicated box in which communication lines and power lines are installed separately, and is buried in the excavated surface of the ground to install communication lines and power lines underground.

[0062] At this time, the communication line / power line box body (110) is installed in a modular fashion along the length of the bottom surface formed by excavating a road or sidewalk.

[0063] Here, the communication line / power line box body (110) can be formed in a U-shape using a precast method with materials such as concrete or recycled plastic.

[0064] The communication line / power line box cover (120) is placed on the upper surface of the communication line / power line box body (110).

[0065] The inspection box (130) is a manhole for inspecting communication lines / power lines and is connected in the longitudinal direction of the communication line / power line box body (110). That is, referring to FIG. 6, the inspection box (130) is formed so that its bottom surface rests on the upper surface of the lower part (113) of the two stepped blocks formed on the connecting end surface of the communication line / power line box body (110), and its two sides are received and connected by the upper part (114) of the two stepped blocks, thereby being arranged and connected in the longitudinal direction of the communication line / power line box body (110).

[0066] The inspection port (140) is a manhole cover and is placed on the upper part of the inspection box (130).

[0067] As described below, the communication line / power line duct (150) is divided into a power line duct (150a) and a communication line duct (150b), and is installed inside the communication line / power line box body (110) so that the communication line and the power line are installed respectively.

[0068] Accordingly, a communication line / power line box structure (100) for undergrounding an overhead line according to an embodiment of the present invention is formed by minimally excavating the area under a road or sidewalk, installing a precast box structure, positioning the communication line and power line in the box structure, and then covering it with an upper cover to finish.

[0069] Meanwhile, FIG. 7 is a perspective view showing an exposed communication line / power line box structure as a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention.

[0070] Referring to FIG. 7, the communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention may form an exposed communication line / power line box (100a) by exposing the communication line / power line box cover (120) to the outside.

[0071] At this time, an incoming line installation joint (111) for installing an incoming line can be formed on both sides of the communication line / power line box body (110).

[0072] That is, as shown in Fig. 7, joints (111) can be installed on the left and right walls so that the incoming line can be installed when installing the incoming line.

[0073] Additionally, the communication line / power line box body (110) may have a cover connection groove (112) formed on the inner upper side of the communication line / power line box body (110) so that the communication line / power line box cover (120) can be seated thereon.

[0074] In addition, communication line / power line branching joints (131) may be formed on both sides of the inspection box (130) to branch the communication line / power line.

[0075] Meanwhile, FIG. 8 is a perspective view showing an asphalt-paved embedded communication line / power line box structure as a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention.

[0076] Referring to FIG. 8, a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention may further include an asphalt pavement (160) on which the communication line / power line box cover (120) is constructed, thereby forming an asphalt pavement-embedded communication line / power line box (100b).

[0077] Meanwhile, FIG. 9 is a drawing illustrating various forms of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention.

[0078] In the case of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention, as shown in FIG. 9a), the communication line / power line duct (150) may include a power line duct (150a) through which a power line is installed; and a communication line duct (150b) through which a communication line is installed.

[0079] At this time, the power line duct (150a) and the communication line duct (150b) can be separated and arranged through a separable partition (170) installed inside the communication line / power line box main body (110).

[0080] In addition, in the case of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention, as shown in Fig. 9 b), a bottom surface drain (180) may be formed on the bottom surface of the communication line / power line box body (110).

[0081] At this time, to prevent water accumulation inside the communication line / power line box structure, it can be manufactured so that water can be discharged through the drain (180) on the bottom surface of the box, and it can also be manufactured without the drain (180) on the bottom surface of the box.

[0082] Through the above-mentioned bottom drain (180), rainwater runoff is prevented, track damage caused by water accumulation inside the box is prevented, and buoyancy can also be prevented.

[0083] In addition, in the case of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention, as shown in Fig. 9 b) and c), the power line duct (150a) and the communication line duct (150b) can be separated and arranged through a separable partition (190) formed in the longitudinal or transverse direction inside the communication line / power line box body (110).

[0084] That is, in the case of a communication line / power line box structure for undergrounding an overhead line according to an embodiment of the present invention, it can be configured in various forms of structures, such as using a separable partition to allow for the burial of an upper communication line and a lower power line, or by providing a separable partition formed by upper and lower partitions or left and right partitions.

[0085] In this case, it is desirable to design the thickness and shape of the separating partition considering the voltage interference effect of the installed power lines.

[0086] In addition, if the operating voltage of the underground cable is high voltage or extra-high voltage, separation distances and partitions may be installed to prevent the underground cable from coming into direct contact with power security communication cables.

[0087] In this case, it is desirable to manufacture the bulkhead structure considering a separation distance so that the influence of current flow from low-voltage wires does not affect the function of the communication line.

[0088] Meanwhile, the communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention is formed as an open structure, and it is preferable to manufacture it so that the communication line / power line box cover and the connection groove inside the box are connected to prevent damage or theft of the communication line / power line installed inside, and the cover can be opened using separate dedicated equipment.

[0089] In addition, the communication line / power line box structure for undergrounding overhead lines according to an embodiment of the present invention can be installed on the road shoulder and under the sidewalk, and it is preferable to manufacture it to ensure durability while considering the upper load.

[0090] In addition, it is desirable to construct a box-shaped structure using concrete, plastic, or recycled plastic, and to have various structures that allow communication lines and power lines to be installed separately by separating them with partitions on the top and bottom or left and right sides.

[0091] In addition, in the case of a communication line / power line box structure for undergrounding an antenna according to an embodiment of the present invention, a fire-resistant partition is installed between the underground power line, communication line, low-current wire, etc.

[0092] In addition, a box connection structure and a fastening device may be provided so that communication line / power line box structures for undergrounding of aerial lines according to an embodiment of the present invention can be continuously installed.

[0093] Ultimately, according to an embodiment of the present invention, by installing above-ground communication lines and power lines in an underground dedicated communication / power line box, the excavation surface of roads or sidewalks can be minimized, and additional burial or management of service lines can be performed efficiently.

[0094] [Construction Method for Communication / Power Line Box Structures for Undergrounding of Overhead Lines]

[0095] FIG. 10 is a flowchart illustrating a construction method of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention, and

[0096] FIGS. 11a to 11f are cross-sectional views specifically illustrating a construction method of a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention.

[0097] In addition, FIGS. 12a and 12b are cross-sectional views illustrating the case where a construction method for a communication line / power line box structure for undergrounding an overhead line according to an embodiment of the present invention is applied to an asphalt pavement.

[0098] Referring to FIG. 10 and FIG. 11a to 11f, a method for constructing a communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention is a method for constructing a communication line / power line box structure for undergrounding an aerial line, wherein

[0099] First, the construction surface for installing the communication line / power line box structure (110) is excavated to a predetermined depth of the ground (210) (S110).

[0100] Specifically, as shown in FIG. 11a, the ground (210) is excavated to a predetermined depth using an excavator or the like. At this time, since the communication line / power line box structure for undergrounding the antenna according to the embodiment of the present invention is buried after excavating the ground, it is preferable to manufacture it taking into account the deformation of the ground, earth pressure, and water pressure.

[0101] Next, as shown in FIG. 11b, a fluid filler foundation (220) is laid on the excavated bottom surface of the ground (210) (S120).

[0102] Next, a communication line / power line box body (230) is installed on the above-mentioned fluid filler base (220) (S130).

[0103] Specifically, as illustrated in FIG. 11c, the communication line / power line box body (230) is a precast dedicated box in which communication lines and power lines are installed separately, and can be buried in the excavated surface of the ground to install communication lines and power lines underground.

[0104] In the communication line / power line box structure according to an embodiment of the present invention, the material of the communication line / power line box body (230) is preferably made of materials such as concrete or recycled plastic, but is not limited thereto.

[0105] At this time, the communication line / power line box body (110) is installed in a modular fashion along the length of the bottom surface formed by excavating a road or sidewalk.

[0106] In addition, an inspection box (130), which is a manhole for inspecting communication lines / power lines, can be connected in the longitudinal direction of the communication line / power line box body (110).

[0107] Next, as illustrated in FIG. 11d, a communication line / power line duct (240) is installed inside the communication line / power line box body (230) (S140).

[0108] Here, the communication line / power line duct (240) may include a power line duct through which a power line is installed; and a communication line duct through which a communication line is installed.

[0109] Next, as shown in FIG. 11e, a communication line / power line box cover (250) is installed on the communication line / power line box body (230) (S150).

[0110] At this time, a cover connection groove is formed on the inner upper side of the communication line / power line box body (230) so that the communication line / power line box cover (250) can be seated.

[0111] In addition, an inspection port (140), which is a manhole cover, can be placed on the upper part of the inspection box (130).

[0112] Next, as illustrated in FIG. 11f, the side fluid filler (260) is backfilled into the side of the main body of the communication line / power line box (230) to complete the communication line / power line box structure (S160).

[0113] In other words, the communication line / power line box structure for undergrounding an aerial line according to an embodiment of the present invention is a front box structure in which a prefabricated box is constructed on a horizontal ground surface below the excavation surface or on a grout foundation layer poured on the ground, and the back surface of the box structure is filled with grout to integrate with the excavation surface, and a cover is formed on the box structure using a precast top plate.

[0114] The installation form of the communication line / power line box structure for undergrounding the overhead line according to an embodiment of the present invention can be classified into an open (exposed) structure in which the box is buried after excavating the ground and the cover is used as the upper surface, and a buried structure in which the upper surface is paved after burial.

[0115] That is, the above communication line / power line box structure may be an exposed type communication line / power line box structure or an asphalt-paved embedded type communication line / power line box structure. The aforementioned steps S110 to S160 are applied to the exposed type communication line / power line box structure.

[0116] Specifically, as shown in FIG. 12a and FIG. 12b, when constructing a communication line / power line box structure on asphalt pavement, asphalt (270: 270a, 270b) is paved on top of the communication line / power line box structure to complete the asphalt pavement embedded box structure (S170).

[0117] Ultimately, according to an embodiment of the present invention, by using a precast box-type structure, additional burial of communication or power lines is possible without re-excavation, and furthermore, visual inspection is possible without excavation during maintenance, thereby reducing maintenance costs.

[0118] Meanwhile, the form of the communication line / power line box structure according to the embodiment of the present invention can replace existing manholes and can be utilized for line expansion or maintenance using an inspection port.

[0119] Furthermore, since current maintenance techniques have limitations in promoting pole-free installation on roads and sidewalks, using a burial method utilizing small boxes allows for the addition of communication and power lines without re-excavation, enables visual inspection during maintenance without excavation, and reduces construction costs.

[0120] Furthermore, the foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0121] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0122] 100: Communication / Power Line Box Structure 100a: Exposed Communication / Power Line Box 100b: Asphalt Pavement Embedded Communication / Power Line Box 110: Communication / Power Line Box Body 111: Service Inlet Installation Joint 112: Cover Connection Groove 113: Lower Part of Both Step Blocks 114: Upper Part of Both Step Blocks 120: Communication / Power Line Box Cover 130: Inspection Box (Manhole) 131: Communication / Power Line Branch Joint 140: Inspection Hatch (Manhole Cover) 150: Communication / Power Line Duct 150a: Power Line Duct 150b: Communication Line Duct 160: Asphalt Pavement 170: Separable Partition 180: Floor Drain 190: Separable Partition 210: Ground 220: Fluid Filler Foundation 230: Communication / Power Line Box Body 240: Communication / Power Line Duct 250: Communication / Power Line Box Cover 260: Lateral fluid filler 270, 270a, 270b: Asphalt pavement

Claims

Claim 1 In a communication line / power line box structure installed by burying for undergrounding of overhead lines, the structure comprises: a communication line / power line box main body (110) which is a dedicated box for separating communication lines and power lines and is buried in an excavated surface of the ground to install communication lines and power lines underground; a communication line / power line box cover (120) which is positioned on the upper surface of the communication line / power line box main body (110); an inspection box (130) which is a manhole for inspecting communication lines / power lines and is connected in the longitudinal direction of the communication line / power line box main body (110); and an inspection opening (140) which is a manhole cover and is positioned on the upper part of the inspection box (130). The communication line / power line duct (150) is divided into a power line duct (150a) and a communication line duct (150b), and is installed inside the communication line / power line box body (110) so that a communication line and a power line are respectively installed therein; wherein the communication line / power line box body (110) is installed in a prefabricated manner in the longitudinal direction on a bottom surface formed by excavating a road or sidewalk, and the communication line / power line box body (110) is formed in a U-shape using concrete or recycled plastic in a precast manner, and a cover connection groove (112) is formed on the inner upper side of the communication line / power line box body (110) so that the communication line / power line box cover (120) can be seated thereon, and the inspection box (130) has its bottom surface seated on the upper surface of the lower part (113) of the two stepped block formed on the connecting end surface of the communication line / power line box body (110), and its two sides are accommodated by the upper part (114) of the two stepped block. A communication line / power line box structure for undergrounding an aerial line, formed to be positioned and connected along the longitudinal direction of the communication line / power line box body (110). Claim 2 delete Claim 3 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 1, an incoming line installation joint (111) for installing an incoming line is formed on both sides of the communication line / power line box body (110). Claim 4 delete Claim 5 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 1, communication line / power line branching joints (131) are formed on both sides of the inspection box (130) to branch the communication line / power line. Claim 6 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 1, the communication line / power line box cover (120) is exposed to the outside to form an exposed communication line / power line box (100a). Claim 7 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 1, it further includes an asphalt pavement (160) constructed on the upper part of the communication line / power line box cover (120) to form an asphalt pavement-embedded communication line / power line box (100b). Claim 8 In claim 1, the communication line / power line duct (150) comprises a power line duct (150a) through which a power line is installed; and a communication line duct (150b) through which a communication line is installed, for a communication line / power line box structure for undergrounding an overhead line. Claim 9 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 8, the power line duct (150a) and the communication line duct (150b) are separated and arranged through a separable partition (170) installed inside the communication line / power line box main body (110). Claim 10 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 8, the power line duct (150a) and the communication line duct (150b) are separated and arranged through a separable partition (190) formed in the longitudinal or transverse direction inside the communication line / power line box body (110). Claim 11 A communication line / power line box structure for undergrounding an aerial line, characterized in that, in claim 1, a bottom surface drain (180) is formed on the bottom surface of the communication line / power line box body (110). Claim 12 A method for constructing a communication line / power line box structure for undergrounding an overhead line according to claim 1, comprising: a) a step of excavating the ground (210) to a predetermined depth for the construction surface to form the communication line / power line box structure; b) a step of laying a fluid filler foundation (220) on the bottom surface where the ground (210) has been excavated; c) a step of installing a communication line / power line box body (230) on the fluid filler foundation (220); d) a step of installing a communication line / power line duct (240) inside the communication line / power line box body (230); e) a step of installing a communication line / power line box cover (250) on the communication line / power line box body (230); and f) a step of completing the communication line / power line box structure by backfilling the side of the communication line / power line box body (230) with a side fluid filler (260). Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete

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