CN210766888U - Temporary opening protection structure for operation high-voltage cable well roof - Google Patents
Temporary opening protection structure for operation high-voltage cable well roof Download PDFInfo
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- CN210766888U CN210766888U CN201921522002.1U CN201921522002U CN210766888U CN 210766888 U CN210766888 U CN 210766888U CN 201921522002 U CN201921522002 U CN 201921522002U CN 210766888 U CN210766888 U CN 210766888U
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Abstract
The utility model relates to an operation high tension cable well roof temporary trompil protective structure, including existing high tension cable well, existing well wall of a well, existing well roof frame roof beam, newly-built well, excavation slope, interim hole, bar planting, recess, non-woven fabrics buffer layer, self-adhesion polymer waterproofing membrane, cement mortar, bowl knot formula support, adjustable top support, dense mesh wire net, high tension cable and fire blanket; temporary holes are formed in the upper edge of a top plate of the existing high-voltage cable well along a frame beam of the top plate of the existing well, and water retaining ridges around the holes are arranged on the periphery of the holes of the temporary holes; and a ground drainage ditch and a slope bottom drainage ditch are respectively arranged at the top and the bottom of the excavated side slope. The utility model has the advantages that: the utility model discloses a to newly-built working well, roof trompil of existing operation high tension cable well roof bar planting to and new and old well interface waterproof treatment, can solve the difficult problem that needs trompil lead wire on existing high tension cable well because of regional electric power service network is perfect betterly, the technology is simple and convenient, has better economic benefits.
Description
Technical Field
The utility model relates to an interim trompil protective structure, concretely relates to interim trompil protective structure of operation high tension cable well roof.
Background
With the rapid development of cities and underground spaces, the power transmission lines are changed from overhead conductors to underground laying and are developed towards deeper underground, so that the high-voltage cable tunnel becomes a main development direction. Cable tunnels can involve access and exit problems for high voltage cables. Conventionally, the access and the leading-out of the high-voltage cable are realized through a reserved interface of a tunnel working well wall. Along with city construction's high-speed development, electric power service area network is constantly perfect, and the electric power piping lane is constantly built, needs to meet with existing operation electric power tunnel, must face the interim trompil problem of existing tunnel, including trompil position, the new and old structure of underground meet waterproof problem, the protection problem of existing operation high tension cable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, providing an operation high tension cable well roof trompil protective structure temporarily, solve the perfect interim trompil problem and the existing operation cable safety problem that brings of electric power service area network.
The temporary hole opening protection structure for the operation high-voltage cable well top plate comprises an existing high-voltage cable well, an existing well wall, an existing well top plate frame beam, a newly-built well, an excavation slope, a temporary hole, a planting bar, a groove, a non-woven fabric buffer layer, a self-adhesive high-molecular waterproof coiled material, cement mortar, a bowl buckle type support, an adjustable jacking, a dense mesh steel wire mesh, a high-voltage cable and a fireproof blanket; temporary holes are formed in the upper edge of a top plate of the existing high-voltage cable well along a frame beam of the top plate of the existing well, and water retaining ridges around the holes are arranged on the periphery of the holes of the temporary holes; a ground drainage ditch and a slope bottom drainage ditch are respectively arranged at the top and the bottom of the excavated side slope; a newly-built well is poured above the temporary hole, and the well wall of the newly-built well is positioned on the well wall of the existing well or the frame beam of the top plate of the existing well and is connected through embedded bars; a groove is reserved on the wall of the newly-built well, a non-woven fabric buffer layer and a self-adhesive high-molecular waterproof coiled material are sequentially laid on the outer side of the interface of the new well and the old well, namely the outer side of the wall of the newly-built well and the upper surface of the existing well top plate, a contraction opening of the wall of the new well is fixed through a cement nail, polyurethane sealing paste is filled in the groove, and cement mortar is laid on the outer side of the; a bowl buckle type support is erected below an existing well top plate frame beam, an adjustable jacking is arranged at the upper part of a vertical rod of the bowl buckle type support, a dense mesh steel wire mesh is laid on the adjustable jacking, and waterproof color strip cloth is laid on the dense mesh steel wire mesh; the high-voltage cable in the existing high-voltage cable well is covered with a fireproof blanket.
Preferably, the method comprises the following steps: the temporary hole is provided with an orifice steel plate edge.
Preferably, the method comprises the following steps: the vertical rod of the bowl buckle type support is positioned on the bottom plate inside the existing high-voltage cable well.
Preferably, the method comprises the following steps: the lowest position in the middle of the waterproof color stripe cloth is provided with a drain hole, and a muddy water collecting barrel is arranged below the drain hole.
The utility model has the advantages that: the utility model discloses a to newly-built working well, roof trompil of existing operation high tension cable well roof bar planting to and new and old well interface waterproof treatment, can solve the difficult problem that need trompil lead wire on existing high tension cable well because of regional electric power service network is perfect betterly, have better economic benefits.
Drawings
FIG. 1 is a plan view of a temporary open hole protective structure of a top plate of an operation high-voltage cable well;
FIG. 2 is a sectional view of a temporary hole-opening protection structure of a top plate of an operation high-voltage cable well;
FIG. 3 is an enlarged schematic view of a new and old well interface;
fig. 4 is a construction process flow chart of the temporary hole-opening protection structure for operating the high-voltage cable well top plate.
Description of reference numerals: the novel high-voltage cable well comprises an existing high-voltage cable well 1, an existing well wall 2, an existing well top plate frame beam 3, a newly-built well 4, an excavation side slope 5, a ground drainage ditch 6, a slope bottom drainage ditch 7, a temporary hole 8, an orifice steel plate edge covering 9, an orifice peripheral water retaining ridge 10, a planting bar 11, a groove 12, polyurethane sealing paste 13, a non-woven fabric buffer layer 14, a self-adhesive high-polymer waterproof coiled material 15, a cement nail 16, cement mortar 17, a bowl buckle type support 18, an adjustable top support 19, a dense mesh steel wire mesh 20, waterproof color strip cloth 21, a drain hole 22, a muddy water collecting barrel 23, a high-voltage cable 24, a cable frame 25 and a fireproof blanket 26.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The temporary hole opening protection structure for the top plate of the operation high-voltage cable well and the construction method thereof adopt an open cut method for excavating the existing high-voltage cable well 1, the slopes of the earthwork excavation slopes at two sides are determined according to field conditions, a foundation pit vertical support or a hanging net spray anchor support is adopted as necessary, and a position opening with the minimum influence on the stress structure of the existing well top plate frame beam 3 is selected according to the structure of the existing well top plate frame beam 3, namely the position of the existing well top plate frame beam 3 is avoided, and the temporary hole opening protection structure is arranged along the existing well top plate frame beam 3. After the hole site is determined, according to the structure and the hole site of the existing high-voltage cable well 1, a working well is newly built above the planned opening of the existing well, the well wall of the working well is positioned right above the existing well top plate frame beam 3 or the existing well wall 2, the new well wall is poured by planting ribs on the existing well top plate frame beam 3 or the existing well wall 2, and the outer sides of the interface of the new well and the old well (the outer side of the new well wall and the upper surface of the existing well top plate) are well protected from water. Before the existing well roof plate is perforated, the operating cable in the existing well is protected, then a protection platform is set up under the well mouth, and the phenomenon that perforated concrete slag, cutting muddy water and the like pollute the adjacent high-voltage cable is avoided. Before tapping, a proper method is adopted to accurately position hole positions, then a concrete core drilling machine is adopted to drill holes, a polishing machine is adopted to polish the periphery of an orifice, and finally a steel plate is adopted to carry out edge covering treatment. Concrete water retaining ridges are arranged around the hole openings of the top plate of the existing well, so that accumulated water of a new well is prevented from flowing into the existing high-voltage cable well 1.
As shown in fig. 1-3, the temporary hole-opening protection structure for the top plate of the operation high-voltage cable well comprises an existing high-voltage cable well 1, a well wall 2 of the existing well, a frame beam 3 of the top plate of the existing well, a newly-built well 4, an excavation side slope 5, a ground drainage ditch 6, a slope bottom drainage ditch 7, a temporary hole 8, an orifice steel plate edge 9, an orifice peripheral water retaining ridge 10, a steel bar planting 11, a groove 12, polyurethane sealing paste 13, a non-woven fabric buffer layer 14, a self-adhesive high-molecular waterproof coiled material 15, cement nails 16, cement mortar 17, a bowl buckle type support 18, an adjustable top support 19, a dense mesh steel wire mesh 20, waterproof color strip cloth 21, a drainage hole 22, a muddy water collecting barrel 23, a high-voltage cable 24, a cable frame 25. A temporary hole 8 is arranged on the top plate of the existing high-voltage cable well 1 to be used as an inlet and an outlet of the high-voltage cable. Excavating the earth covering of the existing high-voltage cable well, determining an excavated side slope 5 and a corresponding net hanging injection protection measure according to the buried depth and the earth covering, and respectively arranging a ground drainage ditch 6 and a slope bottom drainage ditch 7 on the original ground and the slope bottom; according to the structure of the existing shaft roof plate frame beam 3, the position opening which has the minimum influence on the stress structure of the roof plate frame beam is selected, the position of the roof plate frame beam is avoided, the temporary hole 8 is formed along the existing shaft roof plate frame beam 3, the temporary hole 8 is provided with an orifice steel plate wrapping edge 9, and an orifice peripheral water retaining ridge 10 is arranged around the orifice to prevent roof water from flowing into the existing high-voltage cable well 1 through the temporary hole 8. Before the temporary hole 8 is drilled, a new well 4 is poured on an existing high-voltage cable well 1, the well wall of the new well is located on the well wall 2 of the existing well or a frame beam 3 of an existing well top plate, a new well structure and an old well structure are connected into a whole through embedded steel bars 11, water is prevented outside the interface of the new well and the old well (the outer side of the well wall of the new well and the upper surface of the existing well top plate), a groove 12 is reserved on the well wall of the new well 4, during the water prevention construction of the interface of the new well and the old well, a 100g/m2 non-woven fabric buffer layer 14 is firstly paved, then a 2.0-thick self-adhesive high polymer waterproof coiled material 15 is paved, a cement nail 16 is adopted to fix the contraction of the well wall of the new well, a polyurethane sealing paste 13 is.
Before the temporary hole 8 is opened, a bowl buckle type support 18 is erected below the existing shaft top plate frame beam 3, the support vertical rod is erected on a bottom plate inside the existing high-voltage cable shaft 1, an adjustable jacking 19 is arranged on the upper portion of the vertical rod, a dense mesh steel wire mesh 20 is laid on the adjustable jacking 19, waterproof color strip cloth 21 is laid on the dense mesh steel wire mesh 20, a drain hole 22 is arranged at the lowest position in the middle of the waterproof color strip cloth 21, and construction muddy water is drained into a muddy water collecting barrel 23 through the drain hole 22. The support is adjusted around to jack the existing well roof frame beam 3 tightly without gaps. Meanwhile, before the hole is opened, the high-voltage cable 24 in the existing high-voltage cable well 1 is covered by a double-layer fireproof blanket 26 for protection.
As shown in fig. 4, the construction method for operating the temporary open hole protective structure of the high-voltage cable well roof comprises the following steps:
step one, determining the hole position of the top plate of the existing cable well. Look up 1 completion drawings of existing high-voltage cable well, know 1 structural arrangement of existing high-voltage cable well, according to 3 structures of existing well roof plate frame roof beam, select the position opening that influences 3 bearing structure minimum of existing well roof plate frame roof beam, avoid 3 positions of existing well roof plate frame roof beam promptly, set up the hole site along existing well roof plate frame roof beam 3 to carry out 4 structural design of newly-built well. The wall of the newly-built well is required to be positioned right above the existing well top plate frame beam 3 or the existing well wall 2, the newly-built well wall is poured by planting ribs on the existing well top plate frame beam 3 or the existing well wall 2, the wall of the newly-built well is required to meet the shearing resisting effect of earthwork backfilling, and the waterproof performance of the interface between the newly-built well and the old well (the outer side of the newly-built well wall and the upper surface of the existing well top plate) is well achieved.
Step two, earth covering and excavating of the existing cable well. After the hole site of the existing well roof is determined, the existing high-voltage cable well 1 is measured and lofted on site, and the slope grade of slope release and the net hanging injection support are determined according to the buried depth, the soil quality and the site conditions. And firstly, the constructor at the project department rechecks the set axis again according to the engineering positioning point, and measures and lofts the pile position according to the axis positioning. During mechanical excavation, the existing high-voltage cable well 1 position is avoided at the mechanical parking position, construction scheme, technology, quality, safety and environmental protection are carried out on earth construction teams and constructors before earth excavation, specially-assigned persons command and strictly forbid over excavation, and an underground supporting member is required to be provided with an obvious identifier and is forbidden to be damaged and destroyed. And before the height of the existing well roof is 30cm, manual excavation is adopted. After the foundation pit is excavated, a 120-thick M15 brick-built ground drainage ditch 6 (30 cm in width and 40cm in depth) is arranged at the position of no less than 50cm outside the top of the slope, a 120-thick M15 brick-built slope bottom drainage ditch 7 (30 cm in width and 40cm in depth) is also arranged at the position of the slope foot, and the horizontal distance from the wall of the newly-built well is required to be no less than 80cm, so that rainwater is prevented from flowing into the foundation pit, and the slope is stable and does not collapse.
And step three, pouring the new well. The wall of the newly built well is positioned above the frame beam 3 of the existing well top plate or the wall 2 of the existing well. Double-layer steel bars are planted on the frame beam 3 of the existing well top plate or the existing well wall 2, so that the well wall of the newly-built well and the existing high-voltage cable well 1 are subjected to consolidation pouring. The embedded bars 11 are required to be embedded into the existing well top plate frame beam 3 or the existing well wall 2 at least 20cm and at intervals of 20 cm. And then, a steel reinforcement framework is lengthened on the embedded steel bars 11, and the new well 4 is poured.
And step four, protecting the existing high-voltage operation cable. After the newly-built well is poured, the high-voltage cable operated in the existing well is protected according to the hole positions, the double-layer fireproof blanket 26 is covered, and the phenomenon that the cable protection layer is damaged due to the falling of hole opening sparks or concrete residues is avoided, so that disasters are caused.
And step five, setting up the protective support under the existing well hole. Before the hole is opened, a closed protective platform under the temporary hole 8 is firstly erected, so that the falling of wastes such as sparks or concrete slag blocks and muddy water during the hole opening is prevented, and the inner structure of the existing high-voltage cable well 1 is prevented from being polluted. The protective platform is erected by adopting a phi 48x3.5mm steel pipe bowl-buckled support 18, a vertical rod of the bowl-buckled support 18 is erected on a bottom plate in the existing high-voltage cable well 1, and an adjustable jacking 19 is arranged at the upper part of the vertical rod and used for height adjustment. A dense mesh steel wire mesh 20 is laid on the adjustable jacking 19, waterproof color stripe cloth 21 is laid on the dense mesh steel wire mesh 20, and the jacking is adjusted around the vertical rod to tightly jack the existing well roof plate frame beam 3 without gaps. The jacking is adjusted to ensure that the periphery is high and the middle is low, then a drain hole 22 is arranged at the lowest position in the middle of the waterproof color stripe cloth 21, and muddy water is led into a muddy water collecting barrel 23 through a hose for centralized treatment. The dense mesh steel wire mesh 20 can prevent the top plate chiseled concrete from falling into the existing high-voltage cable shaft 1. The distance between the cross bars of the existing high-voltage cable well 1 is 1.5x1.0m, the step pitch is 1.8m, the length of the vertical rod is determined according to the height of the existing high-voltage cable well 1, and the setting length and the width of the platform are respectively 2m larger than the size of the temporary hole 8.
And step six, opening holes and processing orifices. Along 3 trompils of existing well head board frame roof beam, the trompil process need be paid attention to and avoid causing the damage to existing well head board frame roof beam 3, and accurate positioning is very crucial. Because the position of the frame beam 3 of the existing well roof plate cannot be directly projected to the roof plate for marking, measures are actually required to be taken for hole site lofting. Firstly, marking a theoretical position on a well top according to the structural size of the frame beam 3 of the existing well top plate, then drilling through the top plate along the position of the theoretical side line of the frame beam 3 of the existing well top plate at four angles with enough safety, calculating the edge line of the frame beam 3 of the existing well top plate according to the distance between a hole position in the top plate and the edge of the frame beam 3 of the existing well top plate, and popping up a hole position cutting ink line. Then a concrete pavement joint cutter is used for cutting a joint to a depth of 30mm, and after the joint is cut, holes are taken along the inner side of the joint by a concrete core taking machine, wherein the diameter of each hole is 50mm, and the distance between every two holes is 100 mm. And after the hole is taken, the air pick is used for removing the top plate in a blocking mode, and when the top plate meets steel bars, the angle polishing machine is used for cutting the top plate. The large concrete slag is crushed and then the broken blocks are manually and timely transported.
And after the hole of the top plate is drilled, trimming the periphery of the hole surface, and adhering a steel plate edge by using pressure epoxy resin adhesive. Meanwhile, in order to prevent accumulated water in the newly built well 4 from flowing into the existing high-voltage cable well 1 through the orifice, the orifice peripheral water retaining ridge 10 is arranged along the peripheral outer side of the orifice.
And step seven, performing waterproof treatment on the interfaces of the new well and the old well. Because the new and old wells are all located underground, the new and old wells are arranged outside the interface of the new and old wells (the outer side of the well wall of the newly-built well and the top plate of the existing wellSurface) is subjected to waterproofing treatment. The waterproof method comprises the following steps: when the wall of a newly-built well is poured, a groove 12 with the height of 50mm multiplied by 60mm is reserved on the wall of the well with the height of 40cm from the top plate of the existing well; after the well wall of the newly-built well is poured, the new and old well interface waterproof construction is carried out, and 100g/m of waterproof construction is firstly paved2A non-woven fabric buffer layer 14, then a self-adhesive high-molecular waterproof coiled material 15 with the thickness of 2.0 is paved, a cement nail 16 is adopted to fix the well wall contraction of the newly-built well, a polyurethane sealant 13 is filled in the groove 12, and cement mortar 17 with the thickness of 20: 2.5 is paved on the outer layer.
And step eight, dismantling protective measures. And (4) finishing the hole opening edge covering and the water retaining ridge treatment, and removing the protective bracket after finishing the cleaning of the wastes such as concrete slag, muddy water and the like. When the support is dismantled, the jacking support is adjusted firstly to be separated from the frame beam 3 of the existing well top plate, then the support is dismantled from top to bottom, and the support is manually moved out of the existing high-voltage cable well.
Claims (4)
1. The utility model provides an operation high tension cable well roof temporary trompil protective structure which characterized in that: the high-voltage cable well comprises an existing high-voltage cable well (1), an existing well wall (2), an existing well roof plate frame beam (3), a newly built well (4), an excavation side slope (5), a temporary hole (8), a planting bar (11), a groove (12), a non-woven fabric buffer layer (14), a self-adhesive high-molecular waterproof coiled material (15), cement mortar (17), a bowl buckle type support (18), an adjustable top support (19), a dense mesh steel wire mesh (20), a high-voltage cable (24) and a fireproof blanket (26); temporary holes (8) are formed in the top plate of the existing high-voltage cable well (1) along the existing well top plate frame beam (3), and water retaining ridges (10) around the orifices are arranged around the orifices of the temporary holes (8); a ground drainage ditch (6) and a slope bottom drainage ditch (7) are respectively arranged at the top and the bottom of the excavated side slope (5); a new well (4) is poured above the temporary hole (8), and the well wall of the new well is positioned on the existing well wall (2) or the existing well top plate frame beam (3) and is connected through the embedded steel bars (11); a groove (12) is reserved on the wall of a newly-built well, a non-woven fabric buffer layer (14) and a self-adhesive high-molecular waterproof coiled material (15) are sequentially paved on the outer side of an interface between a new well and an old well, namely the outer side of the wall of the newly-built well and the upper surface of an existing well top plate, a contraction opening of the wall of the new well is fixed through a cement nail (16), polyurethane sealing paste (13) is filled in the groove (12), and cement mortar (17) is paved on the outer side of the self; a bowl buckle type support (18) is erected below an existing well top plate frame beam (3), an adjustable jacking support (19) is arranged at the upper part of an upright rod of the bowl buckle type support (18), a dense mesh steel wire mesh (20) is laid on the adjustable jacking support (19), and waterproof color stripe cloth (21) is laid on the dense mesh steel wire mesh (20); the high-voltage cable (24) in the existing high-voltage cable well (1) is covered with a fireproof blanket (26).
2. The temporary open hole protective structure of operation high voltage cable well top plate of claim 1, characterized in that: the temporary hole (8) is provided with an orifice steel plate edge covering (9).
3. The temporary open hole protective structure of operation high voltage cable well top plate of claim 1, characterized in that: the vertical rod of the bowl-buckled support (18) is positioned on the bottom plate inside the existing high-voltage cable well (1).
4. The temporary open hole protective structure of operation high voltage cable well top plate of claim 1, characterized in that: a drain hole (22) is arranged at the lowest position in the middle of the waterproof color stripe cloth (21), and a muddy water collecting barrel (23) is arranged below the drain hole (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921522002.1U CN210766888U (en) | 2019-09-12 | 2019-09-12 | Temporary opening protection structure for operation high-voltage cable well roof |
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| CN201921522002.1U CN210766888U (en) | 2019-09-12 | 2019-09-12 | Temporary opening protection structure for operation high-voltage cable well roof |
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| CN210766888U true CN210766888U (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593599A (en) * | 2019-09-12 | 2019-12-20 | 浙江大学城市学院 | Temporary opening protection structure for top plate of operation high-voltage cable well and construction method |
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- 2019-09-12 CN CN201921522002.1U patent/CN210766888U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593599A (en) * | 2019-09-12 | 2019-12-20 | 浙江大学城市学院 | Temporary opening protection structure for top plate of operation high-voltage cable well and construction method |
| CN110593599B (en) * | 2019-09-12 | 2021-04-20 | 浙江大学城市学院 | Temporary opening protection structure for top plate of operation high-voltage cable well and construction method |
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