CN109680716B - Method for double in-situ protection of electric power culvert by adopting upper suspension and lower support - Google Patents
Method for double in-situ protection of electric power culvert by adopting upper suspension and lower support Download PDFInfo
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- CN109680716B CN109680716B CN201910038386.8A CN201910038386A CN109680716B CN 109680716 B CN109680716 B CN 109680716B CN 201910038386 A CN201910038386 A CN 201910038386A CN 109680716 B CN109680716 B CN 109680716B
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- 239000000725 suspension Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 62
- 239000010959 steel Substances 0.000 claims description 62
- 238000009412 basement excavation Methods 0.000 claims description 33
- 239000002689 soil Substances 0.000 claims description 19
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 239000004567 concrete Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 1
- 238000013508 migration Methods 0.000 abstract description 4
- 230000005012 migration Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 241001536352 Fraxinus americana Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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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
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to the field of underground space construction, in particular to a method for protecting an electric power pipe culvert in situ by adopting upper suspension and lower support. The invention avoids the delay of construction period and the increase of cost caused by the migration of the power pipeline, can ensure the continuous power supply in the process of protecting the power pipeline and constructing underground engineering, and greatly reduces the influence of society.
Description
Technical Field
The invention relates to the field of underground space construction, in particular to a method for protecting an electric power culvert in situ by adopting upper suspension and lower support.
Background
In recent years, with the great development of urban traffic, urban underground engineering is more and more, and the underground engineering is often faced with the protection problem of various high-density pipelines and cable trenches crossing foundation pits. If the migration of the urban electric power pipeline is likely to cause the delay of the construction period and the increase of the cost, the urban electric power pipeline is especially migrated, the process is complex, and the social influence is extremely great. How to achieve the in-situ protection without migration and diversion of the cable trench and the information pipeline in the construction process and ensure the safe operation of the cable trench and the information pipeline is a technical problem in the urban underground engineering construction at present.
Disclosure of Invention
The invention provides a method for double in-situ protection of an electric power culvert by adopting an upper suspension and a lower support, which aims to solve the defects of the prior art.
The invention is realized by the following technical scheme:
the method for double in-situ protection of the electric power culvert by adopting the upper suspension and the lower support comprises the following steps:
and (I) constructing the underground continuous wall: and (3) firstly, detecting the electric power pipeline, and then, constructing the underground continuous wall of the foundation pit support structure.
And (II) constructing lattice columns in the foundation pit: and constructing lattice columns in the foundation pit along the two sides of the length direction of the electric power pipe culvert.
And (III) excavating soil bodies on two sides of the electric power pipe culvert: firstly, excavating a ditch, determining an excavation contour line, then excavating, and stopping excavating when soil bodies on two sides of the electric power culvert are excavated to the elevation of the electric power culvert bottom.
And (IV) bailey beam suspension: firstly, erecting bailey beams on two sides above an electric power culvert, taking supporting system structures on two sides of a foundation pit as supports for the bailey beams, then gradually cleaning soil mass at the lower part of the electric power culvert along the length direction of the electric power culvert, penetrating a steel plate below the electric power culvert along the width direction of the electric power culvert after each cleaning step, wherein the length of the steel plate is larger than the width of the electric power culvert, welding lifting hooks on two sides of the steel plate after penetrating, penetrating steel ropes or inverted chains on the lifting hooks, hanging the steel plate through the bailey beams by adopting a basket bolt, hanging the top surface of the steel plate to the elevation of the bottom of the electric power culvert, continuing to clean soil mass at the lower part of the electric power culvert after the steel plate is suspended, and repeating the steps until the soil mass at the lower part of the electric power culvert is completely cleaned and penetrates the steel plate and the whole electric power culvert is suspended through the bailey beams.
And (V) foundation trench excavation: and excavating foundation grooves downwards below and on two sides of the steel plate, wherein the foundation grooves are excavated manually.
(six) cover plate and cover plate Liang Shizuo: a cover plate and a cover plate beam are arranged in the base groove; the cover plate is positioned below the steel plate and parallel to the steel plate, and the length of the cover plate is larger than the width of the electric power culvert; the cover plate beams are positioned at two sides of the cover plate, the cover plate beams are along the length direction of the electric power pipe culvert, the middle of the cover plate beams is supported by using lattice columns, and two ends of the cover plate beams are supported by using underground continuous walls; the cover plate and the cover plate beam are structures formed by cast-in-place concrete after the template is supported.
According to the method for double in-situ protection of the electric power pipe culvert by adopting the upper portion suspension and the lower portion support, after the underground engineering construction is completed, the foundation pit is backfilled to the elevation of the lower portion of the electric power pipe culvert, the bailey beam, the cover plate beam and the lattice column are removed, and after the bailey beam, the cover plate beam and the lattice column are removed, the two sides of the electric power pipe culvert are symmetrically backfilled, so that the original state of the electric power pipe culvert is restored.
As a preferable scheme:
in the step (II), the lattice columns are steel lattice columns.
In the step (III), the excavation is divided into a mechanical excavation part and a manual excavation part: the mechanical excavation part is an area outside the electric power pipe culvert excavation contour line 1m, and the area inside the excavation contour line 1m adopts artificial excavation.
And if the electric inspection well exists in the bailey beam suspension range, adopting a flame-retardant fireproof corrugated pipe to wrap and protect the cable, and adopting a cable fixing clamp to fix and protect the cable in the electric inspection well at the two ends outside the construction range.
In the step (IV), after the bailey beam is suspended, the steel plates below the electric power pipe culvert are welded into a whole.
In the step (IV), the cleaning width of the soil body at the lower part of the electric power pipe culvert is about 2.5m each time, the cleaning depth is 0.1m, the penetrating width of the steel plate is 2m, and the thickness is 20mm.
In the step (IV), before each steel plate is suspended, the steel plates, the two sides of the electric power pipe culvert and the top hanging net are sprayed and mixed for integral reinforcement treatment, and then suspended.
In the step (five), the excavation depth of the foundation trench is 0.3m.
In the step (six), the cover plate beam and the lattice column are connected by a top sealing plate.
The beneficial effects of the invention are as follows: in the construction process of urban underground engineering, the invention adopts double protection of upper suspension and lower support, adopts the bailey beam suspension protection of the electric power pipe culvert at first, then performs casting of a cover plate and a cover plate beam, and finally adopts double protection measures of bailey beam suspension and cover plate beam suspension and electric power pipe culvert. The invention avoids the delay of construction period and the increase of cost caused by the migration of the power pipeline, can ensure the continuous power supply in the process of protecting the power pipeline and constructing underground engineering, and greatly reduces the influence of society. And the electric power pipe culvert can be restored to the original state in time according to the end of the underground engineering. The construction is convenient, quick and safe, the steps are simple, the operability is strong, the land is saved, and the economic benefit and the social benefit are remarkable.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic longitudinal elevation of the present invention.
Fig. 3 is a schematic structural view of the cable protection of the present invention.
In the figure, 1 electric power pipe culvert, 2 bailey beam, 3 lattice column, 4 wire rope, 5 apron, 6 apron roof beam, 7 steel sheets, 8 underground diaphragm, 9 fire-retardant fire prevention bellows, 10 staple bolt.
Detailed Description
The following specific embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention.
The invention relates to a method for double in-situ protection of an electric power culvert by adopting an upper part suspension and a lower part support, which comprises the following steps:
construction of underground diaphragm wall 8
Before the construction of the underground continuous wall 8 of the foundation pit support structure, the information of the property, the position, the trend, the burial depth, the width and the like of the power pipeline is detected, the construction personnel are subjected to detailed bottom crossing, the importance of the power pipeline is clear, and the technical personnel are assigned to take turns to nurse at the construction site. And (5) constructing the underground diaphragm wall 8 of the foundation pit support structure after detection.
Construction of lattice column 3 in foundation pit
In the construction process of the foundation pit support structure, the construction of the lattice column 3 in the foundation pit can be simultaneously carried out. Lattice columns 3 are constructed in advance along the two sides of the length direction of the power pipe culvert 1, and the lattice columns 3 provide upright post support for cover plate beams 6 constructed in later steps.
The lattice column 3 is preferably constructed as a steel lattice column, which is convenient for later dismantling.
And (III) excavating soil bodies on two sides of electric power pipe culvert 1
Before excavation, firstly, manually excavating a ditch, determining the position and trend of the electric power pipe culvert 1, and then sprinkling white ash out of an excavation contour line. In the excavation process, a site special person directs the machinery to slowly excavate, and a site safety person and a constructor stare in place.
The excavation is divided into a mechanical excavation part and a manual excavation part: the mechanical excavation part is an area outside the excavation contour line 1m of the electric power pipe culvert 1, and the area inside the excavation contour line 1m adopts manual excavation, so that the electric power pipe culvert 1 is prevented from being damaged by mechanical excavation.
And stopping excavating after the soil bodies on the two sides of the electric power pipe culvert 1 are excavated to the bottom elevation of the electric power pipe culvert 1.
(IV) Cable protection before suspension
If the electric inspection well exists in the suspension protection range, in order to avoid long-term naked fatigue or artificial damage of the cable in the electric inspection well, the cable needs to be protected, the protection adopts a flame-retardant fireproof corrugated pipe 9, the flame-retardant fireproof corrugated pipe 9 is firstly cut into two pieces, then the cable is wrapped, and finally the flame-retardant fireproof corrugated pipe 9 is fixed by adopting a hoop 10, as shown in figure 3; in order to ensure the safety of the cable during suspension, the cable fixing clamp is used for fixing the cable in the electric inspection well at the two ends outside the construction range, and rigid protection measures are applied.
(fifth) bailey beam 2 suspension
And assembling the bailey beam 2 by adopting a 25-ton crane, erecting the bailey beam 2 on two sides above the electric power pipe culvert 1 after assembling, and taking a supporting system structure on two sides of a foundation pit as a supporting system of the bailey beam 2 by the bailey beam 2. Then artifical clearance electric power pipe culvert 1 lower part soil body, the electric power pipe culvert 1 lower part soil body is cleared up gradually along an electric power pipe culvert 1 length direction piece, and every clearance just penetrates a steel sheet 7 along electric power pipe culvert 1 width direction in electric power pipe culvert 1 below, the length of steel sheet 7 is greater than the width of electric power pipe culvert 1, clearance width about 2.5m at every turn in this embodiment, clearance degree of depth 0.1m, and the steel sheet 7 width that penetrates is 2m, and thickness is 20mm. When the steel plate 7 penetrates, the 80-sized excavator is adopted to slowly drag the steel plate 7 to a designated position, and the axis of the steel plate 7 is ensured to be perpendicular to the axis of the electric power pipe culvert 1. After penetrating, a lifting hook is welded on two sides of the steel plate 7 at intervals of 3m, and the lifting hook is made of steel bars with the diameter of 28mm and HPB 300. Then, a steel wire rope 4 or a 5t chain block is penetrated into the lifting hook, a 4.5t basket bolt is adopted to suspend the steel plate 7 through the bailey beam 2, the top surface of the steel plate 7 is suspended to the bottom elevation of the electric power pipe culvert 1, and the steel plate 7 is stressed to support the bottom of the electric power pipe culvert 1. When the section of steel plate 7 is suspended, the soil body at the lower part of the next electric power pipe culvert 1 is cleaned continuously, the steps are repeated, and the like until the soil body at the lower part of the electric power pipe culvert 1 is cleaned completely and penetrates into the steel plate 7, and the whole electric power pipe culvert 1 is suspended through the bailey beam 2. After the bailey beam 2 is suspended, the steel plate 7 below the electric power pipe culvert 1 is welded into a whole, so that the suspension is firm and reliable. After the suspension is completed, the integrity of the quality is checked, and the contact position of the electric power pipe culvert 1 and the steel plate 7 is ensured to be firm and reliable. In the construction process, a special person checks the suspension condition every day, and the found problems are treated in time.
Before the electric power pipe culvert 1 is suspended, the steel plates 7, two sides and the top of each penetrating piece at the bottom of the electric power pipe culvert 1 can be suspended after being integrally reinforced. The following conditions are adopted:
(1) if the power line is laid directly buried, and concrete is encapsulated outside the power line: checking whether the encapsulated concrete is cracked, loose and fallen, if the situation is serious, manually removing and chiseling the weak concrete, penetrating the bottom into the steel plate 7, spraying and mixing the two sides and the top hanging net, and then hanging the reinforced concrete.
(2) If the electric power pipeline is laid in the cast-in-place concrete box culvert: checking whether the appearance of the concrete box culvert is cracked or not, loosening and damaging, if the situation is serious, manually removing and chiseling the concrete at the weak part, penetrating the steel plate 7 at the bottom, hanging the nets on two sides and the top, spraying and mixing the steel plate, and then suspending the steel plate, the two sides and the top after the whole reinforcement treatment.
(3) If the brick is built: and (3) dismantling the masonry structure, penetrating the steel plate 7 at the bottom, spraying and mixing the two sides and the top hanging net, and then suspending after the whole reinforcement treatment.
(4) If the material is round tube: firstly, penetrating a steel plate 7 at the bottom, then adopting a hanging net to spray and encapsulate, and forming a stable base, and then suspending.
Foundation trench excavation
And excavating foundation grooves downwards below and on two sides of the steel plate 7, wherein the foundation grooves are excavated manually, and the excavation depth is 0.3m.
(seventh) cover plate 5 and cover plate beam 6 are applied
A cover plate 5 and a cover plate beam 6 are respectively applied in the base groove. The cover plate 5 is positioned below the steel plate 7 and parallel to the steel plate 7, and the length of the cover plate 5 is also larger than the width of the electric power pipe culvert 1. The cover plate beams 6 are positioned at two sides of the cover plate 5 and are constructed along the length direction of the electric power pipe culvert 1, and the cover plate beams 6 are vertically supported by lattice columns 3 constructed in the earlier stage. The cover plate 5 and the cover plate beam 6 are of an integral cast-in-situ concrete structure. The specific construction process is as follows: and (3) paving bottom dies of the cover plates 5 in the foundation trenches, paving side templates after the binding of the reinforcing steel bars is completed, and then binding the reinforcing steel bars, wherein stubble connecting ribs between the cover plates 5 and the cover plate beams 6 are reserved when the reinforcing steel bars are bound. After the cover plate 5 is set up, cover plate beams 6 are then applied to both sides of the cover plate 5. The cover plate beam 6 is also constructed by paving a bottom die in the base groove, paving a side die plate after the steel bar binding is completed, and then binding the steel bars. And finally, pouring concrete in the cover plate 5 and the cover plate beam 6 templates together, curing, and finally forming the integral support structure of the cover plate 5 and the cover plate beam 6.
The middle of the cover plate beam 6 is supported by the lattice column 3, the two ends of the cover plate beam are respectively provided with a constructed underground diaphragm wall 8 as a supporting point, and the cover plate beam 6 is connected with the lattice column 3 by a top sealing plate. This forms a supporting system and eventually the cover plates 5 and cover plate beams 6 transfer forces to the lattice columns 3.
Through the upper suspension and the lower support of the electric power pipe culvert 1, the electric power pipeline can be not required to be migrated during the construction of the underground engineering, meanwhile, the uninterrupted power supply in the construction process of the underground engineering is ensured, and the influence of the construction on society is greatly reduced.
After the upper suspension of the electric power pipe culvert 1 is supported down, a plurality of monitoring points are respectively arranged on the cover plate beam 6 and the cover plate 5 in the underground engineering construction process, the monitoring points are used for monitoring the surface subsidence, the surface subsidence monitoring is an existing mature technology, and the principle and the used monitoring instruments are not repeated here. The ground surface subsidence monitoring can prevent the deformation of the electric power pipe culvert 1 caused by the ground surface subsidence, and further avoid the breakage of the electric power pipeline caused by the soil deformation, thereby further avoiding the occurrence of secondary accidents.
Eighth removal and restoration
And after the underground engineering construction is completed, when the foundation pit is backfilled to the elevation of the lower part of the electric power pipe culvert 1, the elevation of the measured groove meets the requirements and can be recovered. Before the bailey beam 2 is dismantled, firstly, a concrete foundation is poured at the bottom of the electric power pipe culvert 1, and after the foundation strength reaches the design requirement, the bailey beam 2 can be dismantled. And after the cover plate 5, the cover plate beam 6 and the lattice column 3 are dismantled, the two sides of the electric power pipe culvert 1 are symmetrically backfilled, the two sides and the top 1m of the electric power pipe culvert 1 are filled manually, the ramming machine is used for compaction, and a large-scale compacting machine is strictly forbidden.
The above embodiment is only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions made by those skilled in the art within the scope of the present invention should be included in the scope of the present invention.
Claims (8)
1. The method for double in-situ protection of the electric power culvert by adopting the upper suspension and the lower support is characterized by comprising the following steps of: the method comprises the following steps:
construction of an underground continuous wall (8): firstly, detecting an electric power pipeline, and then constructing an underground continuous wall (8) of a foundation pit support structure;
and (II) constructing lattice columns (3) in the foundation pit: constructing lattice columns (3) in the foundation pit along the two sides of the length direction of the electric power pipe culvert (1);
and (III) excavating soil on two sides of the electric power pipe culvert (1): firstly, excavating a ditch, determining an excavation contour line, and then excavating, and stopping excavating when soil bodies on two sides of the electric power pipe culvert (1) are excavated to the bottom elevation of the electric power pipe culvert (1):
and (IV) suspending the bailey beam (2): firstly, erecting bailey beams (2) on two sides above an electric power pipe culvert (1), wherein the bailey beams (2) take supporting system structures on two sides of a foundation pit as supports; then gradually cleaning soil at the lower part of the electric power culvert (1) along one block in the length direction of the electric power culvert (1), penetrating a steel plate (7) below the electric power culvert (1) along the width direction of the electric power culvert (1) every time, wherein the length of the steel plate (7) is larger than the width of the electric power culvert (1), welding lifting hooks at two sides of the steel plate (7) after penetrating, penetrating steel wire ropes (4) or inverted chains on the lifting hooks, hanging the steel plate (7) through bailey beams (2) by adopting a basket bolt, hanging the top surface of the steel plate (7) to the bottom elevation of the electric power culvert (1), continuing to clean the soil at the lower part of the electric power culvert (1) after the steel plate (7) is hung, and repeating the steps until the soil at the lower part of the electric power culvert (1) is completely cleaned and penetrated into the steel plate (7), and the whole electric power culvert (1) is hung through the bailey beams (2), and the steel plate (7) below the electric power culvert (1) is welded into a whole after being hung;
and (V) foundation trench excavation: downwards excavating foundation grooves below and on two sides of the steel plate (7), wherein the foundation grooves are manually excavated;
and (six) applying a cover plate (5) and a cover plate beam (6) to: a cover plate (5) and a cover plate beam (6) are arranged in the base groove; the cover plate (5) is positioned below the steel plate (7) and parallel to the steel plate (7), and the length of the cover plate (5) is larger than the width of the electric power pipe culvert (1); the cover plate beams (6) are positioned at two sides of the cover plate (5), the cover plate beams (6) are along the length direction of the electric power pipe culvert (1), the middle of the cover plate beams (6) is supported by the lattice columns (3), and the two ends of the cover plate beams are supported by the underground continuous wall (8); the cover plate (5) and the cover plate beam (6) are both structures formed by cast-in-place concrete after the formwork is supported;
and (seventh) demolishing and recovering: after the underground engineering construction is completed, the foundation pit is backfilled to the elevation of the lower part of the electric power pipe culvert (1), the bailey beam (2), the cover plate (5), the cover plate beam (6) and the lattice column (3) are removed, and after the bailey beam, the electric power pipe culvert (1) is backfilled symmetrically on two sides, so that the original state of the electric power pipe culvert (1) is restored.
2. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (II), the lattice column (3) is a steel lattice column.
3. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (III), the excavation is divided into a mechanical excavation part and a manual excavation part: the mechanical excavation part is an area outside the excavation contour line 1m of the electric power pipe culvert (1), and the area inside the excavation contour line 1m adopts artificial excavation.
4. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: when the electric inspection well is arranged in the suspension range of the bailey beam (2), the cable is wrapped and protected by adopting a flame-retardant fireproof corrugated pipe, and the cable in the electric inspection well at the two ends outside the construction range is fixedly protected by adopting a cable fixing clamp.
5. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (IV), the cleaning width of the soil body at the lower part of the electric power pipe culvert (1) is 2.5m each time, the cleaning depth is 0.1m, the width of the penetrating steel plate (7) is 2m, and the thickness is 20mm.
6. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (IV), before each steel plate (7) is suspended, the steel plates (7), two sides of the electric power pipe culvert (1) and the top hanging net are sprayed and mixed for integral reinforcement treatment, and then suspended.
7. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (five), the excavation depth of the foundation trench is 0.3m.
8. The method for double in-situ protection of a power culvert using an upper suspension and a lower support of claim 1, wherein: in the step (six), the cover plate beam (6) is connected with the lattice column (3) by adopting a top sealing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038386.8A CN109680716B (en) | 2019-01-16 | 2019-01-16 | Method for double in-situ protection of electric power culvert by adopting upper suspension and lower support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038386.8A CN109680716B (en) | 2019-01-16 | 2019-01-16 | Method for double in-situ protection of electric power culvert by adopting upper suspension and lower support |
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| CN109680716A CN109680716A (en) | 2019-04-26 |
| CN109680716B true CN109680716B (en) | 2024-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110670637A (en) * | 2019-09-18 | 2020-01-10 | 深圳市综合交通设计研究院有限公司 | Arch temporary suspension protection system for underground existing channel and construction method thereof |
| CN111021363A (en) * | 2019-12-31 | 2020-04-17 | 广东顺德电力设计院有限公司 | Method and system for protecting cable by using bailey truss |
| CN110994523B (en) * | 2019-12-31 | 2021-09-17 | 广东顺德电力设计院有限公司 | Method and system for protecting cable |
| CN111622268B (en) * | 2020-05-29 | 2021-07-02 | 中国电建集团福建省电力勘测设计院有限公司 | Protection construction method based on large rigid box culvert penetrating under power pipe gallery |
| CN112359838A (en) * | 2020-11-13 | 2021-02-12 | 威海市市政工程有限公司 | Safe and environment-friendly construction method for protecting large-span suspended pipeline in foundation pit |
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