CN109610478A - A kind of construction method of cable duct - Google Patents
A kind of construction method of cable duct Download PDFInfo
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- CN109610478A CN109610478A CN201811460647.7A CN201811460647A CN109610478A CN 109610478 A CN109610478 A CN 109610478A CN 201811460647 A CN201811460647 A CN 201811460647A CN 109610478 A CN109610478 A CN 109610478A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a kind of construction methods of cable duct, comprising the following steps: step 1, earth excavation；Step 2, cushion construction；Step 3, reinforced bar engineering；Step 4, template construct and installation；Step 5, concrete is stirred and is poured；Step 6, the dismounting of form removable furrow bank side form；Step 7, concrete curing and protection；Step 8, backfilling of earthwork；Step 9, channel steel is welded；Step 10, water-carrying groove is constructed, and prefabricated water-carrying groove simultaneously installs water-carrying groove；Step 11, after cement conservation terminates concrete layer solidification, pitch is smeared to its surface, after bituminous coating drying, gradually sets up supporting mechanism in the trench and starts fixed cable pipe；Step 12, trench cover is constructed, and makes trench cover；Step 13, after in cover plate lid, backfilling of earthwork grave mound is carried out to top.The present invention constructs to form sound construction, ensure that power transmission cable is not damaged, and waterproof performance is good, improves the installation security of power transmission cable.
Description
Technical field
The present invention relates to Phase of Electric Power Projects field more particularly to a kind of construction methods of cable duct.
Background technique
Cable duct is the underground piping to lay and replace electric power or telecommunication cable facility, and by cabling facility
Building enclosure, have the pipeline configurations form such as rectangle, circle, arch.
Existing cable duct construction technology is simple, molding cable duct structural instability, so that internal cable protective effect
Fruit cannot be guaranteed, and the service life of cable duct is short, inside cable high failure rate；The cable duct waterproofness made construct not
It is good, it easily seeps water, so that inside cable is easily submerged by water, causes cable to use dangerous.
Summary of the invention
Present invention aim to address above-mentioned deficiencies, provide a kind of construction method of cable duct.
A kind of construction method of cable duct provided by the invention, which comprises the following steps:
Step 1, earth excavation: in digging process, tracing control foundation trench bottom absolute altitude；Mechanical excavation to away from designed elevation 100~
It is changed to hand excavation when 200mm, repairs side slope and slot bottom；
Step 2, the lumps of wood template cushion construction: is fixed using earth anchor method with 18 steel bar end of Φ；Concrete transportation in place after, manually
It spreads out and puts on, with plate vibrator vibratory compaction, uses wood floated；
Step 3, reinforced bar engineering: step 3.1, reinforced bar binding wire clasp and tail end are bent towards on the inside of member section, step 3.2, are guaranteed
Choose the sectional dimension and absolute altitude of beam steel bar colligation；
Step 4, template construct and installation；
Step 5, concrete is stirred and is poured；
Step 6, the dismounting of form removable furrow bank side form: it can guarantee its surface and corner angle not due to form removal with concrete strength
It can be removed when damage；
Step 7, concrete curing and protection；
Step 8, backfilling of earthwork: when furrow bank concrete strength >=70%, can be backfilled, lift height≤250mm, be compacted
Coefficient >=0.93, and meet design requirement；
Step 9, weld channel steel: be laid with cover board before, cable duct outrigger end weld Thermal zinc plating bath steel, the edge-on welding of channel steel, with
Guarantee that channel steel has enough rigidity；
Step 10, water-carrying groove is constructed, and prefabricated water-carrying groove simultaneously installs water-carrying groove；
Step 11, to the end of cement conservation, after concrete layer solidification, pitch is smeared to its surface, after bituminous coating drying,
Supporting mechanism is gradually set up in the trench and starts fixed cable pipe, and cable pipe is divided into several sections and is successively set up；
Step 12, trench cover is constructed, and makes trench cover；
Step 13, after in cover plate lid, backfilling of earthwork grave mound is carried out to top.
Further, template construct and installation include the following steps: step 4.1 in step 4, and channel uses film coating plywood
The Shimizu concrete template system that 50mm × 100mm lumps of wood, 48 steel pipe of Ф are constituted；Sandwich rubber band is pasted at template bottom, is squeezed with bed course
Tightly, outer bottom cement mortar blocks tight, with mortar leakage prevention；Step 4.2, formwork bracing system is using 48 steel pipe of Ф and plus diagonal brace
Method reinforce, form bracing system use steel pipe supporting system, horizon bar, 400~500mm of upright bar spacing；Step 4.3, in advance
It buries band steel to be corrected with specific purpose tool in a pre-installation, wants every 300mm to bore quasi- 5 holes on band steel, be fixed on side form with M5 self threading pin；Electricity
Cable ditch corner increases outrigger and channel steel, and four angles of embedded part are fixed in the template of outrigger end with M5 self threading pin, and ensures
Installation of embedded parts is upright, and built-in fitting top top mark height is the same as, along flushing, plastics angle bead is fixed on edge in template using tingle, so on furrow bank
It is pushed down again with the lumps of wood or template item afterwards, beats glass cement in plastics angle bead seam crossing；Step 4.4, cable duct furrow bank top does not set tongue and groove,
50mm on the outside of two side cover to furrow bank of trench cover；Cable duct presses the subsiding crack of one wide 20mm of every 15 meters long setting, and in striding equipment
Basis place, corner and across road place set subsiding crack, are clogged between seam using Bituminous hemp fiber, two layers of asphalt felt of outside stickup；Step
4.5, channel draining: channel longitudinal slope is not less than 3 ‰, and bottom of trench looks for 2% horizontal slope；And gutter is set, channel should use free-draining,
Minimum point sets 400 × 400 × 200 catch pits, and sets Ф 100PVC pipe and connect with neighbouring catch-basin, drainpipe bottom and shaft bottom height difference
≥300mm。
Further, concrete stirs and pours and include the following steps: step 5.1 in step 5, concrete stirring: ensures
Raw material are sufficient and are same batch, to guarantee that concrete surface color is consistent；Step 5.2, it concrete transportation: is transported with tank car
It is defeated, it transports to after pouring work surface, is poured concrete in template into small handcart and spade；Step 5.2, before casting concrete,
Side form is covered with plastic film, with concreting process, film gradually lifts；Concrete vibrates using slotting
Entering formula vibrating head, when operation inserts fastly pulls out slowly, uniformly vibrate, sequence progress.
Further, concrete curing and protection include the following steps: step 7.1 in step 7, and concreting finishes
Within 12h, layer of plastic film is covered in concrete plane in time, then carries out watering moisturizing, curing time is no less than 7d；
Step 7.2, finished product protection: following closely the edges and corners suitable for reading in furrow bank with batten, prevents furrow bank corner impaired.
Further, water-carrying groove construction includes the following steps: step 10.1 in step 10, prefabricated water-carrying groove: is installing
When sink template, water-carrying groove side wall and plug are integrally installed, plug width is uniformly buried with ditch wall thickness, and in every end plug
If 4 Ф 80PVC pipes, neither influence flowing water, and facilitate the installation of cover board in this way；Step 10.2, water-carrying groove is installed: first will installation
It is cleaned out in the trench sidewalls at water-carrying groove position, watering is wet, and sits slurry, then places water-carrying groove, is examined with horizontal ruler
It looks into, it is ensured that water-carrying groove is consistent along absolute altitude on channel, after installing water-carrying groove, is conserved, and is not up to some strength in mortar
Before, forbid collision, mobile water-carrying groove；Processing is sealed to water-carrying groove and cable duct junction, prevents surface water from penetrating into channel
It is interior, so that channel keeps the environment of a relatively dry.
Further, trench cover construction includes the following steps: step 12.1 in step 12, prefabricated cover board: trench cover angle steel
Frame is welded using 50 × 5 angle steel of ∠, and angle frame must be upright, and diagonal line traffic control is in 2mm, after angle frame welds, welding
Then coverplate stress reinforcing bar and distributing reinforcement carry out hot galvanizing；Cover board is fastened in template, dedicated cortex mold is fixed to mould
On plate, mold must be smooth, upright, and fixation；Steel wire is placed at lid surface position, prevents lid surface from splitting
Line, and C20 pea gravel concreten is poured on smooth platform, concreting is finished and is conserved removable to some strength rear
Mould；Step 12.2, cover board is installed: cover board being first transported to corresponding position according to typesetting figure, glues rubber under cover board before cover board installation
Gasket is not shaken with ensuring that cover board is smooth；It is adjusted in the bracing wire of channel both sides, to guarantee that cable duct width one is stretched out on cover board both sides
It causes, it is ensured that cover board is straight.
The present invention constructs to form sound construction, ensure that power transmission cable is not damaged, and waterproof performance is good, improves power transmission cable
Installation security.
Specific embodiment
Below by embodiment to further instruction of the present invention, the embodiment of the present invention is with technical solution of the present invention
Premised under implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is unlimited
In following embodiments:
A kind of construction method of cable duct, comprising the following steps:
Step 1, earth excavation: in digging process, tracing control foundation trench bottom absolute altitude；Mechanical excavation to away from designed elevation 100~
It is changed to hand excavation when 200mm, repairs side slope and slot bottom；
Step 2, the lumps of wood template cushion construction: is fixed using earth anchor method with 18 steel bar end of Φ；Concrete transportation in place after, manually
It spreads out and puts on, with plate vibrator vibratory compaction, uses wood floated；
Step 3, reinforced bar engineering: step 3.1, reinforced bar binding wire clasp and tail end are bent towards on the inside of member section, step 3.2, are guaranteed
Choose the sectional dimension and absolute altitude of beam steel bar colligation；
Step 4, template construct and installation: step 4.1, channel uses film coating plywood 50mm × 100mm lumps of wood, 48 steel pipe structure of Ф
At Shimizu concrete template system；Sandwich rubber band is pasted at template bottom, and with bed course jam-packed, outer bottom cement mortar blocks tight
It is close, with mortar leakage prevention；Step 4.2, formwork bracing system using 48 steel pipe of Ф and adds the method for diagonal brace to reinforce, and form bracing system is adopted
With steel pipe supporting system, horizon bar, 400~500mm of upright bar spacing；Step 4.3, pre-buried band steel is in a pre-installation with specific purpose tool school
Just, it wants every 300mm to bore quasi- 5 holes on band steel, is fixed on side form with M5 self threading pin；Cable duct corner increases outrigger and channel steel,
Four angles of embedded part are fixed in the template of outrigger end with M5 self threading pin, and ensure installation of embedded parts Founder, built-in fitting top top
Absolute altitude is flushed with edge on furrow bank, and plastics angle bead is fixed on edge in template using tingle, is then pushed down again with the lumps of wood or template item,
Plastics angle bead seam crossing beats glass cement；Step 4.4, cable duct furrow bank top does not set tongue and groove, two side cover of trench cover to furrow bank outside
50mm；Cable duct by one wide 20mm of every 15 meters long setting subsiding crack, and at striding equipment basis, corner and across road place
If subsiding crack, clogged between seam using Bituminous hemp fiber, two layers of asphalt felt is pasted in outside；Step 4.5, channel drains: channel longitudinal slope is not
Less than 3 ‰, bottom of trench looks for 2% horizontal slope；And gutter is set, channel should use free-draining, and minimum point sets 400 × 400 × 200 collection
Puddle, and set Ф 100PVC pipe and connect with neighbouring catch-basin, drainpipe bottom and shaft bottom height difference >=300mm；
Step 5, concrete is stirred and is poured: step 5.1, concrete stirring: being ensured that raw material are sufficient and is same batch, to protect
It is consistent to demonstrate,prove concrete surface color；Step 5.2, concrete transportation: being transported with tank car, is transported to after pouring work surface, and small handcart is used
Concrete is poured into template with spade；Step 5.2, before casting concrete, side form is covered with plastic film, with
Concreting process, film gradually lift；Concrete vibrates using plug-in type vibrating stick, and when operation inserts fastly pulls out slowly,
Even to vibrate, sequence carries out；
Step 6, the dismounting of form removable furrow bank side form: it can guarantee its surface and corner angle not due to form removal with concrete strength
It can be removed when damage；
Step 7, concrete curing and protection: step 7.1, concreting finishes within 12h, covers in time in concrete plane
Layer of plastic film, then carries out watering moisturizing, and curing time is no less than 7d；Step 7.2, finished product protection: existed with batten nail
Furrow bank edges and corners suitable for reading prevent furrow bank corner impaired；
Step 8, backfilling of earthwork: when furrow bank concrete strength >=70%, can be backfilled, lift height≤250mm, be compacted
Coefficient >=0.93, and meet design requirement；
Step 9, weld channel steel: be laid with cover board before, cable duct outrigger end weld Thermal zinc plating bath steel, the edge-on welding of channel steel, with
Guarantee that channel steel has enough rigidity；
Step 10, water-carrying groove is constructed: step 10.1, prefabricated water-carrying groove: when installing water-carrying groove template, by water-carrying groove side wall and being blocked up
Head is whole to be installed, and plug width uniformly buries 4 Ф 80PVC pipes with ditch wall thickness in every end plug, is neither influenced in this way
Flowing water, and facilitate the installation of cover board；Step 10.2, water-carrying groove is installed: will first be cleared up in the trench sidewalls for installing water-carrying groove position
Completely, watering is wet, and sits slurry, then places water-carrying groove, is checked with horizontal ruler, it is ensured that along absolute altitude in water-carrying groove and channel
Unanimously, it after installing water-carrying groove, is conserved, before mortar is not up to some strength, forbids collision, mobile water-carrying groove；To mistake
Sink and cable duct junction are sealed processing, prevent surface water from penetrating into channel, so that channel keeps a relatively dry
Environment；
Step 11, to the end of cement conservation, after concrete layer solidification, pitch is smeared to its surface, after bituminous coating drying,
Supporting mechanism is gradually set up in the trench and starts fixed cable pipe, and cable pipe is divided into several sections and is successively set up；
Step 12, trench cover is constructed: step 12.1, prefabricated cover board: trench cover angle frame is welded using 50 × 5 angle steel of ∠, angle steel
Frame must be upright, and diagonal line traffic control is in 2mm, after angle frame welds, welded cover plate steel bar stress and distributing reinforcement, then into
Row hot galvanizing；Cover board is fastened in template, dedicated cortex mold is fixed in template, mold must be smooth, upright and solid
It is fixed secured；Steel wire is placed at lid surface position, prevents lid surface cracked, and pour C20 on smooth platform
Pea gravel concreten, concreting are finished and are conserved to some strength rear collapsible die；Step 12.2, cover board is installed: according to row
Cover board is first transported to corresponding position by domain, is glued rubber sheet gasket under cover board before cover board installation, is not shaken with ensuring that cover board is smooth；?
Channel both sides bracing wire adjustment, to guarantee that cable duct equivalent width is stretched out on cover board both sides, it is ensured that cover board is straight；
Step 13, after in cover plate lid, backfilling of earthwork grave mound is carried out to top.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (6)
1. a kind of construction method of cable duct, which is characterized in that by steps are as follows:
Step 1, earth excavation: in digging process, tracing control foundation trench bottom absolute altitude；Mechanical excavation to away from designed elevation 100~
It is changed to hand excavation when 200mm, repairs side slope and slot bottom；
Step 2, the lumps of wood template cushion construction: is fixed using earth anchor method with 18 steel bar end of Φ；Concrete transportation in place after, manually
It spreads out and puts on, with plate vibrator vibratory compaction, uses wood floated；
Step 3, reinforced bar engineering: step 3.1, reinforced bar binding wire clasp and tail end are bent towards on the inside of member section, step 3.2, are guaranteed
Choose the sectional dimension and absolute altitude of beam steel bar colligation；
Step 4, template construct and installation；
Step 5, concrete is stirred and is poured；
Step 6, the dismounting of form removable furrow bank side form: it can guarantee its surface and corner angle not due to form removal with concrete strength
It can be removed when damage；
Step 7, concrete curing and protection；
Step 8, backfilling of earthwork: when furrow bank concrete strength >=70%, can be backfilled, lift height≤250mm, be compacted
Coefficient >=0.93, and meet design requirement；
Step 9, weld channel steel: be laid with cover board before, cable duct outrigger end weld Thermal zinc plating bath steel, the edge-on welding of channel steel, with
Guarantee that channel steel has enough rigidity；
Step 10, water-carrying groove is constructed, and prefabricated water-carrying groove simultaneously installs water-carrying groove；
Step 11, to the end of cement conservation, after concrete layer solidification, pitch is smeared to its surface, after bituminous coating drying,
Supporting mechanism is gradually set up in the trench and starts fixed cable pipe, and cable pipe is divided into several sections and is successively set up；
Step 12, trench cover is constructed, and makes trench cover；
Step 13, after in cover plate lid, backfilling of earthwork grave mound is carried out to top.
2. a kind of construction method of cable duct as described in claim 1, it is characterised in that: template construct and installation in step 4
Include the following steps: step 4.1, the clear water coagulation that channel is constituted using film coating plywood 50mm × 100mm lumps of wood, 48 steel pipe of Ф
Native template system；Sandwich rubber band is pasted at template bottom, and with bed course jam-packed, outer bottom is blocked with cement mortar tightly, with mortar leakage prevention；Step
Rapid 4.2, formwork bracing system is using 48 steel pipe of Ф and the method for diagonal brace is added to reinforce, and form bracing system uses steel pipe support body
System, horizon bar, 400~500mm of upright bar spacing；Step 4.3, pre-buried band steel is corrected with specific purpose tool in a pre-installation, is wanted on band steel
Every 300mm bores quasi- 5 holes, is fixed on side form with M5 self threading pin；Cable duct corner increases outrigger and channel steel, will with M5 self threading pin
Four angles of embedded part are fixed in the template of outrigger end, and ensure installation of embedded parts Founder, and built-in fitting top top mark height is the same as on furrow bank
Along flushing, plastics angle bead is fixed on edge in template using tingle, is then pushed down again with the lumps of wood or template item, in plastics angle bead seam
Glass cement is beaten at place；Step 4.4, cable duct furrow bank top does not set tongue and groove, 50mm on the outside of two side cover to furrow bank of trench cover；Cable duct is by every
The subsiding crack of 15 meters long setting, one wide 20mm, and at striding equipment basis, corner and across road place set subsiding crack, adopted between seam
It is clogged with Bituminous hemp fiber, two layers of asphalt felt is pasted in outside；Step 4.5, channel drains: channel longitudinal slope is not less than 3 ‰, and bottom of trench looks for 2%
Horizontal slope；And gutter is set, channel should use free-draining, and minimum point sets 400 × 400 × 200 catch pits, and sets Ф 100PVC
Pipe is connect with neighbouring catch-basin, drainpipe bottom and shaft bottom height difference >=300mm.
3. a kind of construction method of cable duct as described in claim 1, it is characterised in that: concrete is stirred and poured in step 5
It builds and includes the following steps: step 5.1, concrete stirring: ensure that raw material are sufficient and are same batch, to guarantee concrete surface
Color is consistent；Step 5.2, concrete transportation: being transported with tank car, is transported to after pouring work surface, with small handcart and spade by coagulation
Soil is poured into template；Step 5.2, before casting concrete, side form is covered with plastic film, with concreting
Process, film gradually lift；Concrete vibrates using plug-in type vibrating stick, and when operation inserts fastly pulls out slowly, uniformly vibrates, sequentially into
Row.
4. a kind of construction method of cable duct as described in claim 1, it is characterised in that: concrete curing and guarantor in step 7
Shield includes the following steps: step 7.1, and concreting finishes within 12h, and it is thin to cover one layer of plastics in concrete plane in time
Film, then carries out watering moisturizing, and curing time is no less than 7d；Step 7.2, it finished product protection: is followed closely with batten suitable for reading in furrow bank
Edges and corners prevent furrow bank corner impaired.
5. a kind of construction method of cable duct as described in claim 1, it is characterised in that: water-carrying groove, which is constructed, in step 10 includes
Following steps: step 10.1, prefabricated water-carrying groove: when installing water-carrying groove template, water-carrying groove side wall and plug integrally being installed, and blocked up
Head width uniformly buries 4 Ф 80PVC pipes with ditch wall thickness in every end plug, neither influences flowing water, and convenient cap in this way
The installation of plate；Step 10.2, water-carrying groove to be installed: will first be cleaned out in the trench sidewalls for installing water-carrying groove position, watering is wet,
And slurry is sat, water-carrying groove is then placed, is checked with horizontal ruler, it is ensured that water-carrying groove is consistent along absolute altitude on channel, and installation is well
It after sink, is conserved, before mortar is not up to some strength, forbids collision, mobile water-carrying groove；To water-carrying groove and cable duct knot
It is sealed processing at conjunction, prevents surface water from penetrating into channel, so that channel keeps the environment of a relatively dry.
6. a kind of construction method of cable duct as described in claim 1, it is characterised in that: trench cover, which is constructed, in step 12 includes
Following steps: step 12.1, prefabricated cover board: trench cover angle frame is welded using 50 × 5 angle steel of ∠, and angle frame must be upright, right
Linea angulata controls in 2mm, and after angle frame welds, then welded cover plate steel bar stress and distributing reinforcement carry out hot galvanizing；It will lid
Plate is fastened in template, and dedicated cortex mold is fixed in template, and mold must be smooth, upright, and fixation；In cover board
Surface portion places steel wire, prevents lid surface cracked, and pour C20 pea gravel concreten on smooth platform, mixes
Solidifying soil, which pours, to be finished and conserves to some strength rear collapsible die；Step 12.2, cover board is installed: first transporting cover board according to typesetting figure
To corresponding position, rubber sheet gasket is glued under cover board before cover board installation, is not shaken with ensuring that cover board is smooth；In channel both sides bracing wire tune
It is whole, to guarantee that cable duct equivalent width is stretched out on cover board both sides, it is ensured that cover board is straight.
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| CN110345309A (en) * | 2019-07-18 | 2019-10-18 | 江苏环宇建设工程有限公司 | A kind of natural gas line laying built-in process |
| CN110345309B (en) * | 2019-07-18 | 2021-04-20 | 江苏环宇建设工程有限公司 | Natural gas pipeline laying and pre-embedding method |
| CN110387938A (en) * | 2019-08-15 | 2019-10-29 | 中冶建工集团有限公司 | Indoor drainage ditch construction technology |
| CN110747964A (en) * | 2019-10-31 | 2020-02-04 | 中铁二局第一工程有限公司 | Construction method of inter-line trench plastic model |
| CN110886299A (en) * | 2019-10-31 | 2020-03-17 | 中冶天工集团有限公司 | Pipeline channel easy to construct and top plate pouring method thereof |
| CN112202135A (en) * | 2019-12-31 | 2021-01-08 | 华南理工大学 | Pre-buried cable support and construction method of cable trench |
| CN112202135B (en) * | 2019-12-31 | 2021-12-21 | 华南理工大学 | Pre-buried cable support and construction method of cable trench |
| CN112038980A (en) * | 2020-08-28 | 2020-12-04 | 南京开拓建设有限公司 | Direct-buried cable laying method |
| CN112038980B (en) * | 2020-08-28 | 2021-09-14 | 南京开拓建设有限公司 | Direct-buried cable laying method |
| CN114592577A (en) * | 2022-03-21 | 2022-06-07 | 中交路桥建设有限公司 | Integrated drainage ditch structure for drainage of highway level crossing and construction method |
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