CN104533289B - Overhead transmission line grounded screen non-excavating construction method - Google Patents
Overhead transmission line grounded screen non-excavating construction method Download PDFInfo
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- CN104533289B CN104533289B CN201410794710.6A CN201410794710A CN104533289B CN 104533289 B CN104533289 B CN 104533289B CN 201410794710 A CN201410794710 A CN 201410794710A CN 104533289 B CN104533289 B CN 104533289B
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- 238000010276 construction Methods 0.000 title claims abstract description 89
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000007613 environmental effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 12
- 230000035515 penetration Effects 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000010076 replication Effects 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 244000025254 Cannabis sativa Species 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 12
- 239000002689 soil Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
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- 239000010959 steel Substances 0.000 description 4
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- 238000012986 modification Methods 0.000 description 3
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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- 238000011068 loading method Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of overhead transmission line grounded screen non-excavating construction method, the method passes through horizontal directional drill, before entering to bore, construction area and surrounding enviroment are carried out repetition measurement work, to pierce guiding, ground connection ray unfolding and fix, the operation such as ground connection ray Hui Qian completes laying of grounding device, there is higher safety and can significantly promote the work efficiency that ground connection is laid.In the case of geological conditions allows, can significantly shorten grounding device and lay the duration of needs, and work progress is safer, is not susceptible to accident.In economic benefit, at present, owing to the lease expenses of equipment is higher, the expense comparing hand excavation exceeds a lot, therefore embodies more general in terms of economic benefit, but owing to work progress being no-dig technique, save blue or green compensation expense, therefore, paying for, labour cost green grass or young crops, today that expense gradually rises, environmental requirement improves constantly, directional drilling machine cable laying operation still has the prospect of the application of optimism.
Description
Technical field
The present invention relates to a kind of overhead transmission line grounded screen non-excavating construction method.
Background technology
Currently, China's power network development enters the Large scale construction stage, and construction technology, construction ability, construction equipment are proposed bigger challenge and higher requirement.Improving construction equipment mechanization, automatization level, increase technology content, improve work efficiency, reduce labo r usage, protection environment has become the trend of power network line construction development to greatest extent.
No-dig technique horizontal directional drilling machine is under conditions of not excavating earth surface face, lay a kind of construction machinery of multiple subsurface utility (pipeline, cable etc.), it is widely used in the cities such as water supply, electric power, telecommunication, natural gas, coal gas and has stable political situation in oil pipeline laying construction, being applicable to the ground conditions such as sandy soil, clay, cobble, all can construct in the non-hard rock area of China's major part.Horizontal Directional Drilling is construction technique Technology of Directional Drilling and traditional pipeline construction method of petroleum industry combined, the advantages such as speed of application is fast, construction precision is high, low cost, not welding that it has.
Round steel grounding device is earthing mode the most frequently used in overhead transmission line, its cable laying operation for a long time general the most manually through ground connection channel excavation, earth lead lays, the construction process of trench backfill completes.As a example by smooth bar ground connection 6 × 50 mode, round steel total length about 340 meters, ground connection earthwork about 81m3.Owing to every base equal length of steel tower earth lead is big, quantity is many, and line steel tower earth lead cable laying operation to be completed needs a large amount of labours to carry out large-scale earth's surface excavation, wiring, backfill.This form of construction work is the most backward, and labor intensity is big, work efficiency is low, expense is the highest；The destruction of earth's surface and vegetation is unfavorable for environmental conservation simultaneously, also increases blue or green compensation expense burden, bring the difficulty of peripheral coordination, be unfavorable for being smoothed out of engineering.
Summary of the invention
For overcoming the problems referred to above, it is an object of the invention to provide a kind of overhead transmission line grounded screen non-excavating construction method.
The present invention uses below scheme to realize: a kind of overhead transmission line grounded screen non-excavating construction method, it is characterised in that comprise the following steps:
S01: enter, before boring, construction area and surrounding enviroment are carried out repetition measurement work, and indicate on mixture proportioning in construction, above facility should be avoided during boring；
S02: correctly put horizontal directional drill according to mixture proportioning in construction；
S03: when entering to bore, controls well according to mixture proportioning in construction and buries a little and angle of penetration, can pass through by installing drill bar after completing；Pass through position steering point computing formula as follows:
S04: adjust the rate of penetration of rig when passing through according to the geological condition crept into, to protect drill bit；The mode of creeping into is divided into jacking and rotary drilling two ways, and jacking direction be applicable to crossing process adjusts, and each tuning at least needs jacking 2 ~ 3m；Rotary drilling is applicable to pass through advance, by two kinds of alternately cooperations creeping into mode until completing crossing process；
S05: when passing through, often creeps into a drilling rod, should carry out the record of the measurement data such as the drill bit earth's surface degree of depth, horizontal and vertical position side-play amount, drilling rod corner；When changing drilling direction, the deflection also tackling guide plate measures and record；
S06: drill bit is in crossing process, during as crept into, should stop creeping into, draw back part drilling rod, again creep into after adjustment direction；
S07: in drilling process, drilling track and unearthed point should meet construction requirement, and two ground connection ray spacing, length and the degree of depth should meet design requirement；Wherein the lateral deviation of pilot hole curve is ± 3m, and upper lower deviation is 1～2m, and the lateral deviation of unearthed point is ± 3m, and longitudinal bias is 9～3m；
S08: drill bit crossing length should be greater than ground connection ray length, to ensure back that the ground connection ray after leading all is in the mud of precipitation；
S09: weld for ease of ground connection square frame, the ground connection ray that after having passed through, reply is buried in the range of place 1m carries out excavating and again laying.
In an embodiment of the present invention, before also including before described step S05 that each ground connection ray enters to bore, rig should check and guarantee that drill bit of drilling machine water outlet is all right, adjusts drill bit water yield and hydraulic pressure size according to actual geological condition.
In an embodiment of the present invention, in described step S08, drill bit crossing length should be than the long 5m of ground connection ray length of design.
In an embodiment of the present invention, also including ground connection ray unfolding and fix, wherein the unfolding of this ground connection ray includes:
S411: ground connection ray unfolding before should check whether ground connection ray length meets design requirement, confirm errorless after can carry out unfolding construction；
S412: ground connection ray unfolding should keep certain transmission range, prevent return lead during bend, beat turn round or fracture phenomenon, should set during unfolding special messenger nurse；
Wherein the fixing of ground connection ray includes:
S421: ground connection ray can be fixed on the circular hole position at drill bit guide plate；
S422: fixed form can be taked through replication after guide plate circular hole and to compress ground connection ray termination, and bending length is in the range of 0.5 ~ 0.7m and fixing with iron wire binding, prevent return lead during come off.
In an embodiment of the present invention, described ground connection ray returns to lead and includes:
S51: ground connection ray returns to lead and the non-rotary mode of drilling rod should be used directly to return lead, and drill bit outlet should be upward；
S52: return and should pump into mud to cover ground connection ray during leading；
S53: prepare mud；
Whether S54: return before retracting the beginning, should check that filtering screen is installed and hold water, it is to avoid plugging；Ground connection ray returns rig when leading should start to bury after drill bit pulp again；
S55: return and excessive velocities should be avoided to cause ground connection ray to play torsion when leading.
In an embodiment of the present invention, preparation and the process of described mud includes:
Bentonite is preferably selected in S61: slurrying；For the unlikely plugging of concentration of hydraulic mixture during controlled grouting, needed for different geological states, the viscosity number of mud should meet clay 30～40s, lam 35～40s, mud 40～45s, flour sand 40～45s, fine sand 40～45s, medium sand 45～50s, coarse sand 50～55s, soft rock 45～50s, and survey a mud viscosity every half an hour；
S62: according to the different needs of grouting, viscosifier or lubricant can be added in mud, should ensure that with additive and do not corrode ground connection ray and meet environmental requirement；
S63: the mud, the sediment that abandon should be discharged by the pertinent regulations of environmental conservation.
The invention has the beneficial effects as follows: compared with hand excavation, use horizontal directional drilling machine to carry out laying of grounding device and there is higher safety and can significantly promote the work efficiency that ground connection is laid.In the case of geological conditions allows, can significantly shorten grounding device and lay the duration of needs, and work progress is safer, is not susceptible to accident.In economic benefit, at present, owing to the lease expenses of equipment is higher, the expense comparing hand excavation exceeds a lot, therefore embodies more general in terms of economic benefit, but owing to work progress being no-dig technique, save blue or green compensation expense, therefore, paying for, labour cost green grass or young crops, today that expense gradually rises, environmental requirement improves constantly, directional drilling machine cable laying operation still has the prospect of the application of optimism.In sum, use horizontal directional drilling machine to carry out grounding body cable laying operation, have and lay efficiency height, by advantages such as weather and external environment influence are little; can effectively solve that hand excavation's amount of labour is big, inefficiency problem; reduce blue or green compensation expense, reduction of erection time, protect environment.
Accompanying drawing explanation
Fig. 1 is construction method flow chart of the present invention.
Fig. 2 is to guide to pass through schematic diagram.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in detail.
Elaborate detail in the following description so that fully understanding the present invention.But the present invention can be different from alternate manner described here implement with multiple, those skilled in the art can do similar popularization in the case of intension of the present invention.Therefore the present invention is not limited by following public detailed description of the invention.
In order to allow those skilled in the art be better understood from the present invention, the term related to the application below carries out related description, and trenchless technology TrenchlessTechnology carries out various underground pipeline detection, the construction technology laid, change and repair with minimum earth's surface excavated volume.Horizontal directional drilling HorizontalDirectionalDrilling HDD utilizes horizontal directional drilling machine in the way of controlled drilling trace, carries out creeping in Different Strata and the degree of depth and is guided by navigator and arrives at design attitude and lay the construction method of underground pipeline construction.Pass through Crossing under earth's surface, lay the non-excavating construction of across obstacle (river, building, railway, highway etc.) pipeline.Drill-in fluid/mud DrillingFluid/Mud is often referred to the mixture of water and bentonite or polymer.During the construction of pilot hole PilotHole horizontal directional drilling, the small diameter hole crept into first with guide instrument observing and controlling boring direction.Incidence/outgoing inclination angle Entry/ExitAngle is when carrying out horizontal directional drilling, and drill bit enters stratum or the inclination angle got out from stratum.Return and lead Pull-back horizontal directional drill and complete to creep into after operation is unearthed, drilling rod is reclaimed to burying by unearthed point, lays the working procedure of ground connection ray simultaneously.Navigator Locator/WalkoverSystem mono-kind is for determining the electromagnetic wave signal position and the electronic machine of intensity emitted from transmitting probe.Measurement while drilling MeasurementWhileDrilling MWD continuously detects the measurement technology about drill hole information while creeping into.
As it is shown in figure 1, the present embodiment provides a kind of overhead transmission line grounded screen non-excavating construction method, it is characterised in that comprise the following steps:
S01: enter, before boring, construction area and surrounding enviroment are carried out repetition measurement work, and indicate on mixture proportioning in construction, above facility should be avoided during boring；
S02: correctly put horizontal directional drill according to mixture proportioning in construction；
S03: when entering to bore, controls well according to mixture proportioning in construction and buries a little and angle of penetration, can pass through by installing drill bar after completing；As in figure 2 it is shown, it is as follows to pass through position steering point computing formula:
In formula:
S04: adjust the rate of penetration of rig when passing through according to the geological condition crept into, to protect drill bit；The mode of creeping into is divided into jacking and rotary drilling two ways, and jacking direction be applicable to crossing process adjusts, and each tuning at least needs jacking 2～3m；Rotary drilling is applicable to pass through advance, by two kinds of alternately cooperations creeping into mode until completing crossing process；
S05: when passing through, often creeps into a drilling rod, should carry out the record of the measurement data such as the drill bit earth's surface degree of depth, horizontal and vertical position side-play amount, drilling rod corner；When changing drilling direction, the deflection also tackling guide plate measures and record；
S06: drill bit is in crossing process, during as crept into, should stop creeping into, draw back part drilling rod, again creep into after adjustment direction；
S07: in drilling process, drilling track and unearthed point should meet construction requirement, and two ground connection ray spacing, length and the degree of depth should meet design requirement；Wherein the lateral deviation of pilot hole curve is ± 3m, and upper lower deviation is 1～2m, and the lateral deviation of unearthed point is ± 3m, and longitudinal bias is 9～3m；
S08: drill bit crossing length should be greater than ground connection ray length, to ensure back that the ground connection ray after leading all is in the mud of precipitation；
S09: weld for ease of ground connection square frame, the ground connection ray that after having passed through, reply is buried in the range of place 1m carries out excavating and again laying.
It is noted that the construction method of the present invention also includes preparation of construction and site layout project:
6.1 personnel prepare
6.1.1 organizing construction personnel carry out job specfication, the study of technical measures, training.
6.1.2, workmen carries out rig uses skill education, construction operation to tell somebody what one's real intentions are, understand safety regulation for operations, and after examination, qualified side allows operator to take appointment with certificate.
6.2 facility prepare
6.2.1 construction equipment and construction technology are selected according to boring aperture, drilling depth, geology soil layer situation etc..
6.2.2 determine the selection of drilling tool and drilling rod etc. according to factors such as geological conditions, host function and ground grid design parameters, and select suitable guide plate is installed at drill bit.
6.2.3 construction equipment must carry out checking, safeguarding before using, it is ensured that on-the-spot machinery, equipment should be intact.
6.2.4 the construction stage use metrical instrument and measurer it is ensured that qualified and verification effect duration in.
6.2.5 drill bit should install required sensing equipment before construction, should carry out sensor and the pairing of supporting navigator and calibration after installation.
6.3 places and the preparation of water power
6.3.1 following place data should be prepared before construction:
6.3.1.1 construction site geotechnology survey and design report:
A) formation classification, physical mechanics parameter of rock and soil and in-situ test parameter.
B) groundwater level buried depth situation, type and level changing amplitude, soil, the erosion analysis of water.
C) about foundation soil settlement by soaking, dilatancy, frost heave, the evaluation on liquefiable stratum.
6.3.1.2 place and environmental condition relevant information:
A) place present situation, the survey data including the underground utilities in building, road, high voltage overhead lines, the distribution etc. of pipeline, especially place and adjacent domain, underground structure, dilapidated house etc..
B) weather in place and rain fall in season.
C) mud emission, spoir condition.
D) base form of adjacent building, buried depth, use situation and requirement shockproof, noise.
6.3.1.3 execution conditions relevant information:
A) grounding construction figure and drawing joint examination summary.
B) main construction machinery and corollary equipment, the technical performance data of facility, including construction equipment condition, dynamic condition, service condition, construction technology to the adaptive data of geological conditions etc..
6.3.2 should lay requirement according to grounded screen and carry out site planning according to on-site actual situations before construction, and grading roads, require the position of the planning each ray of grounded screen according to design, and set machinery and Work tool putting position, work progress should reduce Active workings area as far as possible.
6.3.3 water source should prepare according to construction consumption and construction plan in advance with mud；As a example by the consumption of XZ320 type horizontal directional drilling machine: under mud geology, needed for often passing through 10m, output is about 0.33m3, under other soil properties, should suitably strengthen output.
6.3.4 slurrying should arrange mud pit or special container, uses slush pump be stirred and filter, and under special circumstances, filters after can using manual stirring；
6.3.5 in construction, mud forbids mud arbitrarily to discharge, and should arrange special mud-settling pit.
6.3.6 the height of construction site or job platform should control on the high water level that is likely to occur during operation or high tide level 0.5m.
6.4 equipment transports
6.4.1 cranage
6.4.1.1 cranage operation, should be performed by the pertinent regulations of GB6067.
6.4.1.2 the work place of crane should be smooth, should be propped up on solid ground by supporting leg before operation.
6.4.1.3 answer colligation firm during crane loading, rise and fall steadily.
6.4.2 vehicle transport
6.4.2.1 vehicle transport should be performed by the pertinent regulations of " People's Republic of China's law on road traffic safety " and other implementing regulations.
6.4.2.2 it is ensured that rig reliably colligation before transport.
6.4.2.3 cargo vehicle forbids people's goods to load in mixture.
By step, concrete construction process is illustrated below:
7.1 enter to bore before reply construction area and surrounding enviroment carry out repetition measurement work, and indicate on mixture proportioning in construction, above facility during boring, should be avoided.
7.2 correctly put rig according to mixture proportioning in construction after can start into brill operate.
7.3 enter to bore, should control well according to mixture proportioning in construction and bury a little and angle of penetration, can pass through by installing drill bar after completing.Pass through position steering point computing formula:
In formula:
Before 7.4 each ground connection rays enter to bore, rig should check and guarantee that drill bit of drilling machine water outlet is all right, adjusts drill bit water yield and hydraulic pressure size according to actual geological condition.
7.5 rate of penetrations that should adjust rig when passing through according to the geological condition crept into.The mode of creeping into is divided into jacking and rotary drilling two ways, and jacking direction be applicable to crossing process adjusts, and each tuning at least needs jacking 2 ~ 3m；Rotary drilling is applicable to pass through advance, by two kinds of alternately cooperations creeping into mode until completing crossing process.
7.6 when passing through, and often creeps into a drilling rod, all should carry out the record of the measurement data such as the drill bit earth's surface degree of depth, horizontal and vertical position side-play amount, drilling rod corner.When changing drilling direction, the deflection also tackling guide plate measures and record.
7.7 drill bits are in crossing process, during as crept into, should stop creeping into, draw back part drilling rod, again creep into after adjustment direction.
7.8 in drilling process, and drilling track and unearthed point should meet construction requirement, and pilot hole tolerance is shown in Table 1.Two ground connection ray spacing, length and the degree of depth should meet design requirement.
Table 1 pilot hole tolerance
7.9 drill bit crossing length should be greater than ground connection ray length, typically should the long 5m of ground connection ray length of ratio design, to ensure back that the ground connection ray after leading all is in the mud of precipitation.
7.10 weld for ease of ground connection square frame, and the ground connection ray that after having passed through, reply is buried in the range of place 1m carries out excavating and again laying.
8 ground connection ray unfoldings are with fixing
8.1 ground connection ray unfoldings
8.1.1 ground connection ray unfolding before should check whether ground connection ray length meets design requirement, confirm errorless after can carry out unfolding construction.
8.1.2 ground connection ray unfolding should keep certain transmission range, prevent return lead during bend, beat turn round or fracture phenomenon, should set during unfolding special messenger nurse.
8.2 ground connection rays are fixed
8.2.1 ground connection ray can be fixed on the circular hole position at drill bit guide plate.
8.2.2 fixed form can be taked through replication after guide plate circular hole and to compress ground connection ray termination, and bending length is in the range of 0.5 ~ 0.7m and fixing with iron wire binding, prevent return lead during come off.
9 ground connection rays return and lead
9.1 ground connection rays return to lead and the non-rotary mode of drilling rod should be used directly to return lead, and drill bit outlet should be upward.
Mud should be pumped into cover ground connection ray during leading for 9.2 times.
9.3 the preparation of mud and process
9.3.1 bentonite is preferably selected in slurrying.Table 2 requirement should be met for the viscosity of mud needed for the unlikely plugging of concentration of hydraulic mixture during controlled grouting, different geological states, and survey a mud viscosity every half an hour.
Table 2 mud viscosity value table
| Geological state | Clay | Lam | Mud | Flour sand | Fine sand | Medium sand | Coarse sand | Soft rock |
| Viscosity number (s) | 30～40 | 35～40 | 40～45 | 40～45 | 40～45 | 45～50 | 50～55 | 45～50 |
9.3.2 according to the different needs of grouting, the mud additive such as viscosifier, lubricant can be added in mud.Additive therefor should ensure that and do not corrodes ground connection ray and meet environmental requirement.
9.3.3 the mud, the sediment that abandon should be discharged by the pertinent regulations of environmental conservation.
Before 9.4 times retract the beginning, should check that filtering screen is installed and whether hold water, it is to avoid plugging；Ground connection ray returns rig when leading should start to bury after drill bit pulp again.
Excessive velocities should be avoided when leading for 9.5 times to cause ground connection ray to play torsion.
Additionally, it is noted that the method for the present invention also includes quality assurance measure and construction safety and environmental conservation:
Quality assurance measure:
Laying of 10.1 ground connection rays the straight and interradial parallel distance of two ground connection should be no less than 5m, and ground connection ray and ground distance should meet design requirement.
10.2 when neighbouring have power circuit time, it should be understood that former circuit ground connection ray trend, it is to avoid the ground connection ray between two circuits be connected.
10.3, after grounding body backfills, should carry out the test of industrial frequency electric resistance, after its value recorded is multiplied by seasonal factors, not should be greater than design code value.
During 10.4 employing earthing megohm meter measurement of Grounding Resistance, downlead must be disconnected with shaft tower, and should avoid measuring at sleety weather.
10.5 tracking and the records that should carry out measurement while drilling each data when creeping into.
Must be on the scene when 10.6 Quality Inspectors construct with management, supervise whole construction overall process, and carry out visa work.
10.7 grounding bodies connect the requirement that should meet GB50233.
10.8 technology key control point control to be shown in Table 3.
Table 3 technology key control point controls
Construction safety and environmental conservation
11.1 construction safeties
11.1.1 the pertinent regulations in terms of the safety in production such as strict implement " power construction safety work order part 2: overhead power line ", " State Grid Corporation of China's capital construction Security Administration ", " State Grid Corporation of China's electric power safety working regulation (power line portion) ".Working measure must be carried out conscientious confiding a technological secret before construction.Construction is forbidden operate against regulations.
When 11.1.2 constructing, mud pit surrounding should be set up defences guard rail rod.
11.1.3 the use of construction machinery should meet the regulation of JGJ33.
11.1.4 construction temporary electricity should meet the regulation of JGJ46.
11.1.5 the safety inspection of work progress should meet the pertinent regulations of JGJ59.
11.2 environmental conservation
11.2.1 strengthen inspection and the monitoring work of environmental protection, take reasonable measure, protection building site and environment around, reduce air pollution, pollution of waterhead, sound pollution.
11.2.2 should switch off the pump after drill bit is lifted one's head stopping drill bit water outlet in time, it is to avoid the water yield is wasted and causes soil erosion.
11.2.3 in work progress, noting protecting soil vegetation, remaining soil, waste are dealt carefully with.
11.2.4 drainage measure should be taked in job site, waste water give up slurry should through precipitation filter after can discharge.
11.2.5 the inwall of mud pit and bottom should arrange waterproof cloth and prevent mud from oozing such as soil.
11.2.6 mud should recycle.Discarded slurry should process, and must not pollute environment.
11.2.7 job site environment should meet the pertinent regulations of JGJ146.
11.2.8 after construction, send special messenger to clear up, including construction guard station, temporary project, accomplish the site clearing to the greatest extent of the complete material of work and recover landforms.
Although the present invention is open as above with preferred embodiment; but it is not for limiting the present invention; any those skilled in the art are without departing from the spirit and scope of the present invention; technical solution of the present invention is made possible variation and amendment by the method and the technology contents that may be by the disclosure above; therefore; every content without departing from technical solution of the present invention; any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, belongs to the protection domain of technical solution of the present invention.The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent and modification, all should belong to the covering scope of the present invention.
Claims (6)
1. an overhead transmission line grounded screen non-excavating construction method, it is characterised in that comprise the following steps:
S01: enter, before boring, construction area and surrounding enviroment are carried out repetition measurement work, and indicate on mixture proportioning in construction, above facility should be avoided during boring；
S02: correctly put horizontal directional drill according to mixture proportioning in construction；
S03: when entering to bore, controls well according to mixture proportioning in construction and buries a little and angle of penetration, can pass through by installing drill bar after completing；
S04: adjust the rate of penetration of rig when passing through according to the geological condition crept into, to protect drill bit；The mode of creeping into is divided into jacking and rotary drilling two ways, and jacking direction be applicable to crossing process adjusts, and each tuning at least needs jacking 2～3m；Rotary drilling is applicable to pass through advance, by two kinds of alternately cooperations creeping into mode until completing crossing process；
S05: when passing through, often creeps into a drilling rod, should carry out the drill bit earth's surface degree of depth, horizontal and vertical position side-play amount, the record of drilling rod outer corner measurement data；When changing drilling direction, the deflection also tackling guide plate measures and record；
S06: drill bit is in crossing process, during as crept into, should stop creeping into, draw back part drilling rod, again creep into after adjustment direction；
S07: in drilling process, drilling track and unearthed point should meet construction requirement, and two ground connection ray spacing, length and the degree of depth should meet design requirement；Wherein the lateral deviation of pilot hole curve is ± 3m, and upper lower deviation is 1～-2m, and the lateral deviation of unearthed point is ± 3m, and longitudinal bias is 9～-3m；
S08: drill bit crossing length should be greater than ground connection ray length, to ensure back that the ground connection ray after leading all is in the mud of precipitation；
S09: weld for ease of ground connection square frame, the ground connection ray that after having passed through, reply is buried in the range of place 1m carries out excavating and again laying.
Overhead transmission line grounded screen non-excavating construction method the most according to claim 1, it is characterized in that: before also including before described step S05 that each ground connection ray enters to bore, rig should check and guarantee that drill bit of drilling machine water outlet is all right, adjusts drill bit water yield and hydraulic pressure size according to actual geological condition.
Overhead transmission line grounded screen non-excavating construction method the most according to claim 1, it is characterised in that: in described step S08, drill bit crossing length should be than the long 5m of ground connection ray length of design.
Overhead transmission line grounded screen non-excavating construction method the most according to claim 1, it is characterised in that: also including ground connection ray unfolding and fix, wherein the unfolding of this ground connection ray includes:
S411: ground connection ray unfolding before should check whether ground connection ray length meets design requirement, confirm errorless after can carry out unfolding construction；
S412: ground connection ray unfolding should keep certain transmission range, prevent return lead during bend, beat turn round or fracture phenomenon, should set during unfolding special messenger nurse；
Wherein the fixing of ground connection ray includes:
S421: ground connection ray can be fixed on the circular hole position at drill bit guide plate；
S422: fixed form can be taked through replication after guide plate circular hole and to compress ground connection ray termination, and bending length is in the range of 0.5～0.7m and fixing with iron wire binding, prevent return lead during come off.
Overhead transmission line grounded screen non-excavating construction method the most according to claim 1, it is characterised in that: described ground connection ray returns to lead and includes:
S51: ground connection ray returns to lead and the non-rotary mode of drilling rod should be used directly to return lead, and drill bit outlet should be upward；
S52: return and should pump into mud to cover ground connection ray during leading；
S53: prepare mud；
Whether S54: return before retracting the beginning, should check that filtering screen is installed and hold water, it is to avoid plugging；Ground connection ray returns rig when leading should start to bury after drill bit pulp again；
S55: return and excessive velocities should be avoided to cause ground connection ray to play torsion when leading.
Overhead transmission line grounded screen non-excavating construction method the most according to claim 5, it is characterised in that: preparation and the process of described mud include:
Bentonite is preferably selected in S61: slurrying；For the unlikely plugging of concentration of hydraulic mixture during controlled grouting, needed for different geological states, the viscosity number of mud should meet clay 30～40s, lam 35～40s, mud 40～45s, flour sand 40～45s, fine sand 40～45s, medium sand 45～50s, coarse sand 50～55s, soft rock 45～50s, and survey a mud viscosity every half an hour；
S62: according to the different needs of grouting, viscosifier or lubricant can be added in mud, should ensure that with additive and do not corrode ground connection ray and meet environmental requirement；
S63: the mud, the sediment that abandon should be discharged by the pertinent regulations of environmental conservation.
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| CN112103852B (en) * | 2020-07-02 | 2021-12-10 | 广东电网有限责任公司佛山供电局 | Method for crossing river channel and laying cable by using horizontal directional drilling technology |
| CN114607833A (en) * | 2022-03-09 | 2022-06-10 | 苏州城市地下综合管廊开发有限公司 | Vertical curve downward-penetrating construction method for rectangular jacking pipe meeting obstacle |
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| CN102522723B (en) * | 2011-12-15 | 2014-08-27 | 绍兴电力局 | Power cable crossing method without excavating ground surface |
| CN102734556B (en) * | 2012-06-15 | 2014-08-06 | 上海市电力公司 | Trenchless construction method for power pipes |
| CN102900366B (en) * | 2012-10-26 | 2015-03-04 | 东南大学 | Free trajectory planning and deviation correcting method of horizontal directional drill |
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| JP2014113000A (en) * | 2012-12-05 | 2014-06-19 | Chugoku Electric Power Co Inc:The | Portable type grounding device for overhead transmission line |
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