CN111009871B - Method and system for changing cable by crossing subway - Google Patents
Method and system for changing cable by crossing subway Download PDFInfo
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- CN111009871B CN111009871B CN201911221692.1A CN201911221692A CN111009871B CN 111009871 B CN111009871 B CN 111009871B CN 201911221692 A CN201911221692 A CN 201911221692A CN 111009871 B CN111009871 B CN 111009871B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0456—Ladders or other supports
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/08—Installations of electric cables or lines in or on the ground or water in tunnels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/10—Installations of electric cables or lines in or on the ground or water in cable chambers, e.g. in manhole or in handhole
Abstract
The invention discloses a method and a system for changing a cable across subways, which comprises the following steps: arranging a bridge frame above the subway tunnel and in an area not exceeding a road surface, fixing the bridge frame at two ends of the bridge frame and the area above the subway tunnel through a connecting base, placing a plurality of cable channels in the bridge frame along the length direction of the bridge frame, respectively placing openings at two ends of the cable channels at two ends of the bridge frame and exceeding the two ends of the bridge frame, enabling the cable channels to be communicated with the whole bridge frame, and laying a bridge-crossing cable in the cable channels; the method is characterized in that cable connecting wells are respectively arranged at two ends of the bridge frame outside the subway position, at least two connecting well channels are arranged in the cable connecting wells, one connecting well channel is communicated with the cable channel, one end of a moving cable is led into the other connecting well channel, the moving cable is communicated with a bridge-crossing cable in the cable connecting well, and two ends of the moving cable are communicated across the subway tunnel through the bridge-crossing cable.
Description
Technical Field
The invention relates to the field of cable moving and changing, in particular to a method and a system for moving and changing a cable across subways.
Background
With the acceleration of urbanization in China, ground traffic cannot adapt to the increasing traffic demand generated by the existing economic activities and people's lives, the traffic problem is serious day by day, and urban rail traffic has the characteristics of quickness, safety, large capacity and the like, so that a large number of dense crowds can be dismissed in time, and the urban rail traffic can be developed vigorously due to the fact that the accessibility of the urban rail traffic to areas along the line is greatly improved.
The existing power pipeline forms a power network, the power cable is in four directions and reaches eight directions, urban rail transit is developed, conflicts with the existing power pipeline are certain, and the existing power pipeline needs to be moved and modified. If the existing power pipeline is directly transformed around the subway main body, the cable is long in length, high in cost and multiple in indefinite factors, the power cable directly crosses the subway main body to be transformed, the cable is short, the cost is low, the power cable and the subway main body are constructed without mutual interference, and the like, so that the method for transforming the cable crossing the subway main body needs to be improved and researched.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art, and provides a method and a system for changing a cable across subways, which are used for solving the problems of high cost, long construction period, high construction difficulty and the like caused by directly changing the existing cable or power pipeline around a subway main body.
The technical scheme provided by the invention is as follows:
a method for changing a cable across subways comprises the following steps: arranging a bridge frame above a subway tunnel and in an area not exceeding a road surface, fixing the bridge frame at two ends of the bridge frame and the area above the subway tunnel through a connecting base, placing a plurality of cable channels in the bridge frame along the length direction of the bridge frame, respectively placing openings at two ends of the cable channels at two ends of the bridge frame and exceeding the two ends of the bridge frame, enabling the cable channels to be communicated with the whole bridge frame, and laying a bridge-crossing cable in the cable channels; the cable connection well is respectively arranged at two ends of the bridge frame which are positioned outside the subway position, at least two connection well channels are arranged in the cable connection well, one of the connection well channels is communicated with the cable channels which exceed the two ends of the bridge frame, one end of the moving and modifying cable is led into the other connection well channel, so that one end of the moving and modifying cable is communicated with the bridge-crossing cable in the cable connection well, and the two ends of the moving and modifying cable are communicated across the subway tunnel through the bridge-crossing cable.
The method for changing the cable in the subway construction process has the advantages that the cable is changed directly by crossing the subway tunnel, a bridge is arranged above the planned position of the subway and in an area not exceeding the road surface, and the position of the bridge is fixed through a connecting base; placing a plurality of cable channels in the bridge frame along the length direction of the bridge frame, placing openings at two ends of the cable channels at two ends beyond the two ends of the bridge frame to enable the cable channels to be communicated with the whole bridge frame, and laying a bridge-crossing cable in the cable channels; the method for modifying the cable comprises the steps of digging cable connecting wells at positions except the position planned to be set on the subway and adjacent to two ends of a bridge frame, wherein the cable connecting wells are used for connecting a modified cable and a bridge-spanning cable, at least two connecting well channels are arranged in the cable connecting wells, one of the connecting well channels is communicated with the cable channel, and the other connecting well channel is communicated with the modified cable, so that the modified cable and the bridge-spanning cable are connected in the cable connecting wells, and the cable connecting wells can be used for maintaining the modified cable more conveniently and rapidly or increasing or reducing the number and the connection mode of the cable.
Further, S1, judging whether the cable moving and changing requirement occurs due to subway excavation construction before a bridge is arranged above the position of the subway tunnel and in an area not exceeding a road surface, if not, not setting the bridge, if so, suspending the subway excavation construction and pouring side walls on two sides of the excavated subway tunnel; s2, in the process of pouring the side wall, simultaneously fixing the two connecting bases on the top surfaces of the side walls on the two sides of the subway tunnel respectively, wherein the positions of the two connecting bases are opposite; s3, arranging the bridge, fixing two ends of the bridge on the connecting bases at opposite positions respectively, enabling the bridge to cross a subway tunnel and be fixed in an area above the position of the subway tunnel, placing a plurality of cable channels in the bridge along the length direction of the bridge, placing openings at two ends of the cable channels beyond two ends of the bridge respectively, and blocking the openings; s4, excavating pits downwards and building a cable connecting well on the lower side of the excess part of the cable channel outside the two ends of the bridge, wherein the wall extends upwards beyond the pits, forms one connecting well channel around the cable channel on the side corresponding to the cable channel, and leaves another connecting well channel on the side facing the migration and modification cable; s5, opening the openings of the cable channel plugs with the corresponding number according to the number of the migration cables, keeping the remaining cable channel plugs, laying a bridge-spanning cable in the cable channel with the opening, and extending two ends of the bridge-spanning cable into a cable connecting well; s6, after the removal and modification cable is powered off and cut off, enabling two ends of the removal and modification cable to respectively penetrate through another connecting well channel of the two cable connecting wells to the cable connecting wells, and electrifying after being connected with the bridge-spanning cable to finish the removal and modification of the cable; s7, after the moving and modifying cable is laid, filling cement above the bridge until the cement is level with a horizontal line of a road surface; the cable junction well top is covered with the well lid, and the height of well lid flushes with the water flat line on road surface after filling.
Before the cable is moved and changed, whether the requirement of the cable is moved and changed due to subway construction needs to be judged, and if not, a bridge frame is not arranged; if so, the excavation construction of the subway needs to be suspended, the side wall of the subway is poured, the connecting base is fixed on the top surface of the side wall and is in a relative position in the pouring process, the two ends of the bridge frame are conveniently welded with the connecting base, so that the two ends of the bridge frame are fixed on the top surface of the side wall, the bridge frame is made to cross the subway tunnel and is fixed in the area above the bridge frame, after cable channels are arranged in the bridge frame, the openings of all the cable channels are blocked, and the bridge frame is opened when in use; digging a pit hole downwards below the outsides of the two ends of the bridge frame and the excess part of the cable channel and building a wall to form a cable connecting well, wherein the cable needs to be connected in the cable connecting well, so that a connecting well channel needs to be formed around the cable channel when the wall is built, and another connecting well channel is reserved on one side of the cable to be guided in; opening the openings blocked in the cable channels with corresponding quantity according to the quantity of the migration and modification cables, keeping other channels in a blocking state, laying a bridge-spanning cable in the cable channel with the opened openings, cutting off the migration and modification cables after the bridge frame and the cable connection well are arranged, reducing the time of power failure, respectively connecting two ends of the migration and modification cables with the bridge-spanning cable in the cable connection well through the connection well channels reserved in the cable connection well, and electrifying to complete the migration and modification of the cables; fill cement to flushing with road surface water flat line, do not influence the normal function on road surface, the well lid is filled with to cable junction well top, and the well lid flushes with road surface water flat line with the height of cable junction well, does not influence the normal function on road surface, sets up the well lid and makes things convenient for the maintenance in the cable junction well more and to the change of cable junction in the well.
Furthermore, connection base includes the connecting plate and sets up the reinforcing bar in the connecting plate bottom, connection base passes through the reinforcing bar is fixed on the top surface of the side wall of subway tunnel both sides.
The connection base comprises a connection plate and reinforcing steel bars arranged at the bottom of the connection plate, the connection plate is connected with the bridge through welding or other modes, and the reinforcing steel bars arranged at the bottom of the connection and top concrete of a side wall of the subway below the bridge position are connected to fix the position of the connection base, namely the position of the fixed bridge is above the subway, and the connection base stretches across a subway tunnel to change cables.
Further, when the cable channels are arranged, the number of the arranged cable channels is 2-4 times of the number of the moved cables. The number of the cable channels is more than that of the cables to be moved and changed, the cable channels can be used as spare cable channels, when other cables need to be moved and changed and laid by the bridge, the spare cable channels can be used, and a new bridge does not need to be reset.
Further, when the bridge is arranged, the position of the bridge is at least 20cm away from the road surface. The height of the bridge is limited to a certain extent, and because the bridge is relatively close to the road surface, pressure and weight can be applied to the ground when the road surface bears vehicles and other transportation tools, so that the bridge cannot be arranged too close to the road surface, otherwise, the operation of the road surface can be influenced, and therefore, in order not to influence the normal operation of the road surface, the position of the bridge is at least 20cm away from the road surface.
A subway-crossing cable moving and changing system comprises a bridge frame, a plurality of cable channels, a cable connecting well, a bridge-crossing cable, a connecting base, a subway tunnel and a moving and changing cable, wherein the bridge frame is fixed above the subway tunnel through the connecting base and does not exceed the position of a road surface; the bridge cable is laid in the cable channel; the cable connecting wells are respectively arranged at two ends of the bridge frame outside the subway tunnel, at least two connecting well channels are arranged in each cable connecting well, one connecting well channel is communicated with the cable channel, the other connecting well channel is led in a moving and changing cable, and the moving and changing cable is communicated with the bridge-spanning cable in the cable connecting well.
Arranging a bridge frame above the position planned to be opened of the subway and in an area not exceeding a road surface, wherein the position of the bridge frame is fixed through a connecting base; the system has the advantages that the cable moving and changing of large projects are avoided, cost is low, time consumption is low, and risks are low; the system is characterized in that cable connecting wells are dug at positions other than the position planned to be set up in the subway and adjacent to two ends of a bridge frame and used for connecting a moving cable and a bridge-crossing cable, at least two connecting well channels are arranged in each cable connecting well, one of the connecting well channels is communicated with the cable channel, and the other at least one connecting well channel is communicated with the bridge-crossing cable, so that the moving cable and the bridge-crossing cable are connected in the cable connecting wells, and the cable connecting wells can be used for maintaining the moving cable more conveniently and quickly, or increasing or reducing the number of the cables and the connecting mode.
Furthermore, the side face of the bridge is provided with a plurality of W-shaped connecting rods which are connected up and down along the side face, and the top face of the bridge is provided with a plurality of straight-line-shaped connecting rods which are connected left and right along the top face. The bridge is limited by the road surface in height, so that the W-shaped connecting rods which are vertically connected with the side surfaces and are arranged on the side surfaces of the bridge are used for better limiting and fixing the height of the bridge, the width of the bridge is determined according to the number of the cable channels, the linear connecting rods can be welded on the top surface of the bridge after the number of the cable channels is determined, the linear connecting rods are convenient and quick to assemble and disassemble compared with the W-shaped connecting rods, the bridge can be improved in a time-saving and labor-saving mode when the width of the bridge needs to be expanded, but the W-shaped connecting rods are more stable in fixing and limiting compared with the linear connecting rods, and therefore the bridge is suitable for height limitation of the bridge.
Furthermore, connection base includes the connecting plate and sets up the reinforcing bar in the connecting plate bottom, the subway tunnel includes tunnel main part and side wall, connection base passes through the reinforcing bar is fixed the top surface of side wall, thereby make the top surface of side wall with the both ends of crane span structure are passed through connection base is connected. The connection base comprises a connection plate and reinforcing steel bars arranged at the bottom of the connection plate, the connection plate is connected with the bridge through welding or other modes, and the reinforcing steel bars arranged at the bottom of the connection and the top concrete of the side wall of the subway below the bridge position are connected to fix the position of the connection base, namely the position of the fixed bridge is arranged above the subway tunnel, and the subway is crossed to change cables.
Further, the opening part of cable junction well is equipped with stair structure, stair structure is used for placing the well lid, the well lid arrange in behind the opening part of cable junction well with the total height of cable junction well flushes or is higher than the road surface with the water flat line on road surface. Through cable junction well open-ended stair structure, can imbed the well lid at the opening part, the well lid arrange in behind the opening part of cable junction well with the total height of cable junction well flushes or is higher than the road surface with the water flat line on road surface, therefore do not influence the normal work on road surface, when needs change the cable junction in the cable junction well, shift out the well lid from the opening part again, the cable junction is revised the back, arrange the opening part in the well lid again, such design can be more convenient and fast ground maintain the cable that changes, or increase or reduce the quantity and the connected mode of cable.
Further, the number of the cable channels arranged in the bridge is 2-4 times of the number of the mobile and modified cables.
Further, the bridge is arranged at a position which is at least 20cm away from the road surface.
Further, the height of the bridge is not higher than 65cm, the width is determined according to the number of the moved and changed cables, the height of the bridge is limited by a road surface and is not suitable for being higher than 65cm, the width of the bridge is not limited greatly and can be determined according to the number of the cut cables, and when the number of the cables is large, the width of the bridge can be expanded appropriately.
A cable bridge spanning subways comprises a plurality of cable channels, wherein the cable channels are distributed in the bridge along the length direction of the bridge, openings at two ends of each cable channel are formed in two ends of the bridge, and the cable channels are communicated with the whole bridge; and the bottoms of the two ends of the cable bridge are respectively provided with a connecting base.
Further, the connection base comprises a connection plate and a steel bar arranged at the bottom of the connection plate.
Further, the number of the cable channels is larger than that of the actually used cable channels, and is 2-4 times of that of the actually used cable channels.
Furthermore, the side surface of the cable bridge is provided with a plurality of W-shaped connecting rods which are connected up and down along the side surface, and the top surface of the bridge is provided with a plurality of straight-line-shaped connecting rods which are connected left and right along the top surface.
Further, the height of the bridge frame is not higher than 65cm, and the width of the bridge frame is determined according to the number of the actually used cable channels.
Compared with the prior art, the invention has the beneficial effects that:
(1) compared with the traditional cable moving and changing mode, namely the cable moving and changing around a subway tunnel, the cable moving and changing mode has high cost and long construction period because the length of the cable is longer, and the method, the system and the bridge provided by the invention are characterized in that the bridge is arranged above the subway main body in a crossing manner so as to move and change the cable, so that the method, the system and the bridge are more economic and rapid;
(2) because the number of the cable channels in the method, the system and the bridge provided by the invention is more than that of the cable channels used in the plan, the spare cable channels in the bridge can be used for different cable relocation plans, and the practicability is high;
(3) the cable connection well provided by the invention is provided with the well cover which is embedded in the well mouth, so that the operation on the road surface is not influenced, and the cable connection well is more rapid and convenient when the increase and decrease of the cable in the bridge frame or the change of the cable connection mode in the cable connection well are needed.
Drawings
Fig. 1 is a flow chart of a method provided in an embodiment of the invention.
Fig. 2 is a schematic flow chart of steps of a specific embodiment of a method provided in an embodiment of the present invention.
Fig. 3 is a schematic flow chart illustrating the optimization steps of the method provided in the embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure view of a cross-subway cable relocation system provided in another embodiment of the present invention.
Fig. 5 is a schematic top view of a cross-subway cable relocation system according to another embodiment of the present invention.
Fig. 6 is a schematic perspective view of a bridge frame according to another embodiment of the present invention.
Fig. 7 is a schematic perspective view of a cable connection well according to another embodiment of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1, the present embodiment provides a method for laying a cable, which is mainly used in a situation where the cable needs to be migrated and modified due to subway construction, and includes the steps of:
arranging a bridge frame above the subway tunnel and in an area not exceeding a road surface, fixing the bridge frame at two ends of the bridge frame and the area above the subway tunnel through a connecting base, placing a plurality of cable channels in the bridge frame along the length direction of the bridge frame, respectively placing openings at two ends of the cable channels at two ends of the bridge frame and exceeding the two ends of the bridge frame, enabling the cable channels to be communicated with the whole bridge frame, and laying a bridge-crossing cable in the cable channels; the cable connecting wells are respectively arranged at two ends of the bridge frame which are positioned outside the subway position, at least two connecting well channels are arranged in the cable connecting wells, one connecting well channel is communicated with the cable channels which exceed two ends of the bridge frame, one end of the moving cable is led into the other connecting well channel, one end of the moving cable is communicated with the bridge-crossing cable in the cable connecting well, and two ends of the moving cable are communicated across the subway tunnel through the bridge-crossing cable.
As a preferable scheme, as shown in fig. 2, a specific scheme of the method for changing the cable across the subway is as follows:
s1, judging whether the cable moving and changing requirement occurs due to subway excavation construction before arranging a bridge frame above the position of a subway tunnel and in an area not exceeding a road surface, if not, not setting the bridge frame, if so, suspending the subway excavation construction and pouring side walls on two sides of the excavated subway tunnel;
s2, in the process of pouring the side wall, fixing two connecting bases on the top surfaces of the side walls on the two sides of the subway tunnel respectively at the same time, wherein the positions of the connecting bases are opposite;
s3, arranging a bridge, namely fixing two ends of the bridge on connecting bases in opposite positions respectively to enable the bridge to cross a subway tunnel and be fixed in an area above the position of the subway tunnel, placing a plurality of cable channels in the bridge along the length direction of the bridge, placing openings at two ends of the cable channels at two ends of the bridge respectively, and plugging the openings;
s4, excavating a pit hole downwards and building a wall to form a cable connecting well at the outer side of the two ends of the bridge and below the exceeding part of the cable channel, wherein the wall extends upwards beyond the pit hole, one connecting well channel is formed around the cable channel at one side corresponding to the cable channel, and the other connecting well channel is reserved at one side facing the migration and modification cable;
s5, opening the openings of the cable channel plugs with the corresponding number according to the number of the migration cables, keeping the remaining cable channel plugs, laying a bridge-spanning cable in the cable channel with the opening opened, and extending two ends of the bridge-spanning cable into the cable connecting well;
s6, after the removal and modification cable is powered off and cut off, enabling two ends of the removal and modification cable to respectively penetrate through another connecting well channel of the two cable connecting wells to the cable connecting wells, and electrifying after being connected with the bridge-spanning cable in the cable connecting wells to finish the removal and modification of the cable;
s7, after the moving and modifying cable is laid, filling cement above the bridge until the cement is level with a horizontal line of a road surface; the cable connecting well is covered with a well cover, and the height of the well cover is flush with the horizontal line of the road surface after the well cover is filled.
Preferably, the connection base includes a connection plate and reinforcing bars disposed at the bottom of the connection plate, and as shown in fig. 3, the connection base is fixed to the top surfaces of the side walls on both sides of the subway tunnel by the reinforcing bars before the bridge is disposed.
As a preferred scheme, when the cable channels are arranged, the number of the arranged cable channels is 2-4 times of the number of the mobile and modified cables; when the bridge is arranged, the position of the bridge is at least 20cm away from the road surface.
The method for moving and modifying the cable provided by the embodiment can be applied to a system for moving and modifying a cross-subway cable provided by another embodiment, and as shown in fig. 4, 5, 6 and 7, the system for moving and modifying a cross-subway cable provided by the another embodiment comprises a bridge frame 1 and a subway tunnel, wherein the subway tunnel comprises a subway tunnel main body 2a and side walls 2b at two sides of the subway tunnel, and further comprises a connecting base 4, a plurality of cable channels 5, a cable connecting well 6, a cross-bridge cable and a moving and modifying cable, the bridge frame 1 is fixed above the subway tunnel through the connecting base 4 and does not exceed the position of a road surface 3, the cable channels 5 are distributed in the bridge frame 1 along the length direction of the bridge frame 1, openings at two ends of the cable channels 5 are arranged beyond two ends of the bridge frame 1, so that the cable channels 5 are communicated with the whole bridge frame 1; the bridge cable is laid in the cable channel 5; the cable connecting wells 6 are respectively arranged at two ends of the bridge frame 1 outside the position of the subway tunnel main body 2a, at least two connecting well channels 7a and 7b are arranged in each cable connecting well 6, in the embodiment, the connecting well channels 7a are communicated with the cable channels 5, the transition cable is led into the connecting well channels 7b, and the transition cable is communicated with the bridge-crossing cable in the cable connecting wells 6;
preferably, in the other embodiment, as shown in fig. 6, the side surface of the bridge frame 1 is provided with a plurality of W-shaped connecting rods 8 which are connected up and down along the side surface, and the top surface of the bridge frame 1 is provided with a plurality of straight-line-shaped connecting rods 9 which are connected left and right along the top surface.
Preferably, in the another embodiment, a step structure 10 is arranged at the opening of the cable connection well 6, the step structure 10 is used for placing a well cover, and the well cover is placed at the opening of the cable connection well 6 and then is flush with the horizontal line of the road surface 3 or higher than the road surface 3 with respect to the total height of the cable connection well 6.
Preferably, in the other embodiment, the connection base includes a connection plate and reinforcing bars disposed at the bottom of the connection plate, and as shown in fig. 4, the connection base 4 is fixed to the top surface of the side wall 2b by the reinforcing bars, so that the top surface of the side wall 2b and both ends of the bridge 1 are connected by the connection base 4.
Preferably, in the other embodiment, the number of the cable channels arranged in the bridge is 2-4 times of the number of the cut cables, the bridge is arranged at a position at least 20cm away from a road surface, the height of the bridge is not higher than 65cm, and the width of the bridge is determined according to the number of the migration cables.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (8)
1. A method for changing a cable across subways is characterized by comprising the following steps: arranging a bridge frame above a subway tunnel and in an area not exceeding a road surface, fixing the bridge frame at two ends of the bridge frame and the area above the subway tunnel through a connecting base, placing a plurality of cable channels in the bridge frame along the length direction of the bridge frame, respectively placing openings at two ends of the cable channels at two ends of the bridge frame and exceeding the two ends of the bridge frame, enabling the cable channels to be communicated with the whole bridge frame, and laying a bridge-crossing cable in the cable channels; the method comprises the following steps that cable connecting wells are respectively arranged at two ends of a bridge frame which is located outside a subway position, at least two connecting well channels are arranged in the cable connecting wells, one connecting well channel is communicated with cable channels which exceed the two ends of the bridge frame, one end of a migration and modification cable is led into the other connecting well channel, one end of the migration and modification cable is communicated with a bridge-spanning cable in the cable connecting well, and the two ends of the migration and modification cable are communicated across a subway tunnel through the bridge-spanning cable;
the side face of the bridge is provided with a plurality of W-shaped connecting rods which are connected up and down along the side face, and the top face of the bridge is provided with a plurality of straight-line-shaped connecting rods which are connected left and right along the top face.
2. The method for changing the cable across the subway according to claim 1, wherein the method specifically comprises the following steps:
s1, judging whether the cable moving and changing requirement occurs due to the subway excavation construction before arranging the bridge frame in the area which is above the subway tunnel and does not exceed the road surface, if not, not setting the bridge frame, if so, suspending the subway excavation construction and pouring the side walls at the two sides of the excavated subway tunnel;
s2, in the process of pouring the side walls, fixing the two connecting bases on the top surfaces of the side walls on the two sides of the subway tunnel respectively at opposite positions;
s3, arranging the bridge, fixing two ends of the bridge on the connecting bases at opposite positions respectively, enabling the bridge to cross a subway tunnel and be fixed in an area above the position of the subway tunnel, placing a plurality of cable channels in the bridge along the length direction of the bridge, placing openings at two ends of the cable channels beyond two ends of the bridge respectively, and blocking the openings;
s4, excavating potholes downwards and building a cable connecting well on the outer sides of the two ends of the bridge frame and below the excess part of the cable channel, wherein the wall extends upwards beyond the potholes, one of the connecting well channels is formed around the cable channel on the side corresponding to the cable channel, and the other connecting well channel is left on the side facing the migration and modification cable;
s5, opening the openings of the cable channel plugs with corresponding number according to the number of the migration cables, keeping the remaining cable channels plugged, laying a bridge-spanning cable in the cable channel with the opening, and extending the two ends of the bridge-spanning cable to the cable connecting well
Internal;
s6, after the removal and modification cable is cut off, the two ends of the removal and modification cable respectively penetrate through the other connecting well channel of the two cable connecting wells to the cable connecting wells, and are electrified after being connected with the bridge-spanning cable in the cable connecting wells to finish the cable connection
Moving and modifying;
s7, after the transfer cable is laid, filling cement above the bridge frame to be level with the horizontal line of the road surface; the cable junction well top is covered with the well lid, and the height of well lid flushes with the water flat line on road surface after filling.
3. The method for migrating and modifying cables across subways as recited in claim 2, wherein the connection base comprises a connection plate and reinforcing steel bars arranged at the bottom of the connection plate, and the connection base is fixed on the top surfaces of the side walls at both sides of the subway tunnel through the reinforcing steel bars.
4. The method for migrating and modifying cables across subways according to claim 2, wherein when the cable channels are arranged, the number of the arranged cable channels is 2-4 times of the number of the migrating and modifying cables.
5. The method for migrating and modifying cables across subways as recited in any of claims 1-4, wherein the position of the bridge is at least 20cm from the road surface when the bridge is arranged.
6. A subway-crossing cable moving and changing system is characterized by comprising a bridge, a plurality of cable channels, a cable connecting well, a bridge-crossing cable, a connecting base, a subway tunnel and a moving and changing cable, wherein the bridge is fixed above the subway tunnel through the connecting base and does not exceed the position of a road surface; the bridge cable is laid in the cable channel; the cable connecting wells are respectively arranged at two ends of the bridge frame outside the subway tunnel, at least two connecting well channels are arranged in each cable connecting well, one connecting well channel is communicated with the cable channel, a transition cable is led into the other connecting well channel, and the transition cable is communicated with the bridge-spanning cable in the cable connecting well;
the side surface of the bridge is provided with a plurality of W-shaped connecting rods which are connected up and down along the side surface, and the top surface of the bridge is provided with a plurality of straight-line-shaped connecting rods which are connected left and right along the top surface;
the opening part of cable junction well is equipped with the stair structure, the stair structure is used for placing the well lid, the opening part of cable junction well is arranged in to the well lid, arranges in the height of the well lid behind the cable junction well top flushes or is higher than the road surface with the water flat line on road surface.
7. The system of claim 6, wherein the connection base comprises a connection plate and a steel bar arranged at the bottom of the connection plate, the subway tunnel comprises a tunnel body and a side wall, and the connection base is fixed on the top surface of the side wall through the steel bar, so that the top surface of the side wall is connected with the two ends of the bridge frame through the connection base.
8. The system for migrating and modifying subway-crossing cables as claimed in any one of claims 6 to 7, wherein the number of cable channels arranged in the bridge is 2-4 times of the number of the migrating and modifying cables; the bridge is arranged at a position which is at least 20cm away from the road surface; the height of the bridge is not higher than 65cm, and the width of the bridge is determined according to the number of the cable channels.
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| CN111009871B true CN111009871B (en) | 2021-09-17 |
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| CN111697482B (en) * | 2020-05-07 | 2021-11-23 | 国网浙江省电力有限公司金华供电公司 | 10KV overhead line non-outage moving and modifying method |
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| NL1015278C2 (en) * | 2000-05-23 | 2001-12-05 | Konink Wegenbouw Stevin B V | Building equipped with a sleeve for cables and fluid pipes. |
| CN102074922B (en) * | 2010-12-09 | 2013-02-13 | 潘立超 | Communication pipeline construction method |
| CN103791159A (en) * | 2012-11-02 | 2014-05-14 | 成张佳宁 | Pipe-jacking construction method for small-diameter pipes |
| JP5870180B2 (en) * | 2013-12-10 | 2016-02-24 | 東光電気工事株式会社 | Transmission line transfer method and transfer device |
| CN207672616U (en) * | 2017-11-29 | 2018-07-31 | 广州市绿化公司 | A kind of outdoor cable penetration pipe is passed by one's way laying structure |
| CN108868814B (en) * | 2018-08-24 | 2023-12-29 | 中铁西安勘察设计研究院有限责任公司 | Air shaft of underground excavation air duct shield tunnel of collapsible loess combined pebble soil stratum |
| CN209592937U (en) * | 2019-04-18 | 2019-11-05 | 四会市创兴电力建设工程有限公司 | A kind of cable laying construction structure |
| CN110397079B (en) * | 2019-07-06 | 2021-12-17 | 中铁二十五局集团第五工程有限公司 | Construction process for open cut station of marine facies water-rich karst stratum |
| CN211830139U (en) * | 2019-12-03 | 2020-10-30 | 广东顺德电力设计院有限公司 | Cross-subway cable moving and changing system |
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