CN110277661B - Lightning protection grounding construction method capable of continuously maintaining without secondary groove digging - Google Patents
Lightning protection grounding construction method capable of continuously maintaining without secondary groove digging Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
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- 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
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Abstract
The invention relates to a lightning protection grounding construction method capable of continuously maintaining without secondary groove digging, which comprises a newly-built lightning protection grounding field construction method and a traditional lightning protection grounding field maintenance construction method, wherein the newly-built lightning protection grounding field construction method comprises a lightning protection grounding horizontal grounding body construction design and a lightning protection grounding vertical grounding body construction design, and the traditional lightning protection grounding field maintenance construction method comprises a horizontal grounding body maintenance construction design and a vertical grounding body maintenance construction design. The invention has the advantages that the change is innovative, the high-pressure filling permeation mode is realized by combining the high-pressure filling pump, the grounding system has good maintainability, the maintenance cost is reduced, the maintenance effect is improved, and the maintenance period is shortened.
Description
Technical Field
The invention relates to the technical field of lightning protection grounding, in particular to a lightning protection grounding construction method which does not need secondary groove digging for sustainable maintenance.
Background
The existing grounding construction process method in lightning protection grounding is quite mature, products adopted by grounding are rich and various and are widely adopted by various industries, and the existing grounding construction method comprises the following steps:
1. measuring the soil resistivity and soil composition analysis of a construction site to formulate a grounding construction scheme, determining the materials/quantity and layout of horizontal grounding bodies and the type and quantity of vertical grounding, constructing a grounding grid, and formulating the construction scheme;
2. the ground grooves are dug whether the construction site is soil, sand beach, desert, hills, mountains, weathered rocks, etc. In the first step, a certain number of grounding grooves are dug, and horizontal grounding bodies and vertical grounding bodies are paved. The construction standards under different geological conditions are different, and the construction difficulty is different. The construction of digging the grounding groove is the largest stage of the engineering quantity in the grounding construction, and a large amount of manpower and machinery are required to be input, which accounts for a large proportion of the construction cost;
3. the vertical grounding body is generally selected from common grounding bodies such as hot-galvanized angle iron, hot-galvanized round steel, hot-galvanized round tubes, copper-clad steel grounding bodies and the like, the cost is low, the use is wide, and the punched filled resistance reducing agent is vertically buried underground or directly buried underground. The high-demand selective electrolytic ion grounding body is provided with a slow-release high-efficiency ion filler in an ion grounding tube, electrolytic ions slowly permeate into surrounding soil to adjust the conductivity of the surrounding soil, so that the aim of reducing ground resistance is fulfilled, the electrolytic ion grounding body is usually installed by punching (the diameter is more than 100 mm), and a well-adjusted anti-friction agent is filled in the holes;
4. the horizontal grounding body laid at the bottom of the grounding tank adopts hot-galvanized flat steel or round steel or flat copper or round copper, and the periphery of the grounding body is wrapped with a resistance reducing agent to enlarge the contact area with soil and improve the capacity of discharging current;
5. the horizontal grounding body and the vertical grounding body are connected into a conductive whole by hot melting or welding, so that the grounding area is enlarged;
6. the organic fertilizer is more or less active in construction, and is wrapped around the horizontal and vertical grounding bodies to increase the conductive area and improve and adjust the conductivity of the soil. The use amount of the high-resistance soil in construction is large;
7. after construction is finished, the underground water is settled along with rainwater washing, the soil is loose, the effect of the renting reducing agent is reduced, and the ground resistance is increased. The grounding grid is maintained, the grounding groove is partially excavated again, the renting agent is buried again, and a new vertical grounding body is paved again. The construction cost of manpower and machinery is far more than the cost of materials, so that the overall maintenance cost is high and the same as that of reconstruction. Meanwhile, the timeliness is poor, most of the maintenance periods are year-by-year, and the effective response to the renting change caused by seasonal change cannot be achieved.
The above 7 points are only simple descriptions for 7 important construction nodes in the existing lightning grounding construction, which are construction processes and methods adopted by each construction unit at present and are also methods adopted by the construction of building electrical grounding and communication lightning grounding systems all the time, and each design construction unit is only put into the development of vertical grounding body products for many years, and the long-acting effect is achieved through the slow release function of the fillers inside and outside the ion grounding body, which is developed from a common grounding body to the existing electrolytic ion grounding body. And the maintenance is to excavate the buried lease-lowering agent and add a horizontal vertical grounding body again.
The technical method adopted by the 7-point combined construction has the following defects:
1. the 2 nd grounding groove digging is an indispensable construction link for the first construction of the lightning protection grounding system, the labor and mechanical cost is high, the construction difficulty in mountainous areas is higher, and the specific gravity of the total construction cost is high;
2. the construction of the vertical grounding body in item 3, the installation of the common vertical grounding body by punching, filling and reducing the renting agent or directly smashing into the soil does not have the condition of secondary maintenance. The filler in the electrolytic ion grounding body has a slow release function, and various manufacturers publicize long-acting maintenance-free, and actually cannot achieve the long-acting function, so that the ion slow release function is invalid within 3-5 years, and the function of the electrolytic ion grounding body is the same as that of a common grounding body. Several manufacturers in China have the function of secondary filling when designing the electrolytic ion grounding body, but the function is not completed to the actual use stage, and only stays at the propaganda or sample stage. The lightning current leakage capacity of the lightning protection grounding grid is in a direct proportion relation with the area of the grounding grid, and is not in a direct proportion relation with the vertical grounding quantity and the depth, and the influence of the vertical grounding body on the whole grounding grid is not great even if the vertical grounding body has secondary maintenance conditions;
3. in the construction of the horizontal grounding body of item 4, the adopted horizontal grounding materials are different, but the construction methods are the same, and the periphery of the horizontal grounding body is wrapped with a lease reducing agent and then is watered, tested and backfilled. The problem of re-maintenance is not considered, and the earth and stone buried pen is greatly moved again for secondary maintenance. The problem of item 7 is generated, the maintenance engineering quantity is large, the maintenance cost is high, the time period is long, and the damage is large;
4. 3/4/6 item adopts electrolyte or delustering agent natural penetration mode, the horizontal diffusion range is limited, and the electrolyte or delustering agent natural penetration mode basically penetrates downwards to form the same fine roots, so that the buried grounding body has limited soil conduction performance through the expansion of the delustering agent;
5. the construction process and the product of the vertical grounding embodiment in item 3 do not have good maintenance performance, and the common grounding body cannot be filled with electrolyte or paste-like lease-reducing agent for the second time. Few electrolytic ion grounding body products capable of being filled secondarily are available, and even if electrolyte is filled, the electrolyte also permeates into soil in a natural permeation mode;
6. the construction process and the product of the 4 th horizontal grounding body have no maintainability, and are constructed once, and the later maintenance is to add the delustering agent at the second time of trench digging and newly treat the trench digging at the second time.
The lightning grounding construction is finished, along with the change of four seasons, rainwater is washed in soil, the soil is wet and dry and is frozen, the ground resistance of a grounding grid rises within one year, the requirement of a communication system for grounding ground resistance cannot be met, and the problem of secondary maintenance is faced.
The defects are analyzed aiming at the traditional construction process and products of lightning protection grounding, so that how to reduce the cost in later maintenance can be realized, the minimum engineering quantity is adopted under the condition of not using secondary groove digging, the later maintenance is efficiently completed in a short time, the problem needs to be considered and solved in the existing lightning protection grounding construction, and the problem is particularly important for the design, construction and maintenance of high-value target lightning protection grounding systems such as national defense and military communication, wireless communication base stations and the like.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a lightning protection grounding construction method which can be continuously maintained without secondary groove digging.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the construction method comprises a newly-built lightning protection grounding field construction method and a traditional lightning protection grounding field maintenance construction method, wherein the newly-built lightning protection grounding field construction method comprises a lightning protection grounding horizontal grounding body construction design and a lightning protection grounding vertical grounding body construction design, and the traditional lightning protection grounding field maintenance construction method comprises a horizontal grounding body maintenance construction design and a vertical grounding body maintenance construction design.
Further, the construction design of the lightning grounding horizontal grounding body comprises the following steps:
(1) after the trench is dug, filling yellow soil or clay with the thickness of 100mm into the bottom layer of the trench, and uniformly spreading;
(2) horizontally arranging horizontal grounding flat steel or flat copper along the central line of the groove, placing the horizontal grounding flat steel or flat copper on backfill, welding or hot melting butt joint a grounding body joint, and performing anti-rust treatment on a welding position;
(3) the plastic buckles are arranged on the horizontal flat steel at intervals of 1-1.5 meters, and the 4-minute PE polyethylene filling pipe is fixed on the horizontal grounding body along the horizontal grounding body buckles;
(4) four holes with the diameter of 2MM are drilled on the periphery of the polyethylene filling pipe at intervals of one meter and are uniformly distributed at an angle of 90 degrees to serve as high-pressure filling liquid dredging holes, the length of each pipe is controlled within 100 meters, the far end of each pipe is permanently sealed by an end socket, the near end of each pipe is butted by a copper joint, a metal belt is firmly bound, and a horizontal grounding body is used as a dredging pipe for later-stage high-pressure filling;
(5) fixing a polyethylene dredging pipe, paving the slurry resistance reducing agent along the horizontal grounding body and the periphery of the dredging pipe, and wrapping the horizontal grounding body;
(6) spreading the resistance reducing agent, uniformly watering and permeating for many times, and continuously supplementing the resistance reducing agent;
(7) when the trench soil is backfilled, the end of the perfusion dredging pipe led out of the ground is provided with an inspection well part, and the polyethylene filling pipe is led out of the ground from the well part and is provided with a blue protective cover;
(8) screwing off a copper seal head of a polyethylene filling pipe for a ground screen needing to be maintained, butting a conduit joint of a high-pressure filling pump, and filling the well-mixed electrolyte into a dredging conduit at high pressure by the high-pressure filling pump;
(9) and the later-stage high-pressure filling pump directly fills electrolyte or conductive liquid at high pressure to finish maintenance.
Further, when the resistance reducing agent is paved on the horizontal grounding body in the step (5), a high-pressure filling pump is adopted to fill and encapsulate the paste resistance reducing agent along the whole horizontal grounding body, or 400 × 500 × 60 resistance reducing agent modules are formed at intervals of 5 meters by high-pressure filling.
Further, the construction design of the lightning grounding vertical grounding body comprises the following steps:
(1) selecting a grounding body: selecting a copper-clad steel grounding body, an angle iron grounding body, a galvanized pipe or a common electrolytic ion grounding body according to the cost;
(2) selecting a grounding body, and drilling a deep hole with the diameter of 100-;
(3) after the grounding hole is processed, a grounding rod is put into the hole, a red copper pipe dredging pipe is inserted into the hole to serve as an electrolyte high-pressure permeation pipe, a bottom end socket is sealed, permeation holes are formed in a staggered mode at the interval of 100mm from bottom to top, the diameters of the permeation holes are 2mm, the permeation holes are higher than the grounding rod and do not punch on the earth surface, a hot galvanizing workover rig is adopted on the earth surface, the design of a red protective cover is adopted, and the permeation holes are 140 mm and 160mm higher than the earth surface;
(4) filling a paste resistance reducing agent or a high-efficiency ion filler into the grounding hole, and tamping a hole opening by using clay at a position 500mm away from the ground;
(5) after the grooves of the vertical grounding body and the horizontal grounding body are backfilled, 5-10 liters of electrolyte is filled into the red copper dredging pipe at high pressure after the embedded resistance reducing agent is stabilized;
(6) and (4) butting a high-pressure filling pump during later maintenance, directly filling electrolyte at high pressure, and finishing maintenance.
Further, the maintenance construction design of the horizontal grounding body comprises the following steps:
(1) determining the specific position and the pre-buried depth of the horizontal grounding and the adopted grounding body material according to a construction drawing, performing electronic measurement positioning before construction, determining the specific trend of the horizontal grounding through an underground metal positioning instrument, and making a ground surface mark;
(2) measuring the ground resistance value, designing construction points according to the ground resistance value, drawing a construction drawing, and marking on the right side or the side 100mm of the horizontal grounding body;
(3) vertically drilling holes at the mark points by using a drilling machine, wherein the diameter of a drill bit is 12-20mm, and the length of the drill bit reaches 100-200mm below the grounding body;
(4) inserting a 3-minute steel pipe into the hole to serve as a high-pressure pouring guide pipe, tamping and plugging the hole by using viscous soil at a distance of 100-300mm away from the ground surface, and sealing the hole;
(5) inserting an underground high-pressure guide pipe into the ground to butt joint with an injection joint of a high-pressure injection pump, injecting the adjusted filler into the underground horizontal grounding body accessory by the high-pressure injection pump, and diffusing the filler in the horizontal grounding body accessory through high-pressure injection to be in contact conduction with the horizontal grounding body and in deep contact with soil;
(6) the perfusion volume of each perfusion point is determined according to the ground resistance measurement value and the soil condition;
(7) and later maintenance, namely secondary maintenance of the grounding body is realized under the condition of no earth movement.
Further, the design of the maintenance construction of the vertical grounding body comprises the following steps:
(1) after the vertical grounding body is positioned, drilling a deep hole within 100mm of the vertical grounding body by a drilling machine, wherein the diameter is 20-40mm with more than 2 meters as the standard;
(2) inserting a copper tube with a prepared end socket and a prepared connector into the hole, enabling the copper tube to reach the bottom of the hole in length, performing sealing hole treatment on the lower side of the ground surface by 500mm, and preparing preset pouring tubes;
(3) selecting different fillers according to different design requirements to perform high-pressure injection on a certain amount of fillers;
(4) and (4) measuring and filling, stopping filling after the measurement is qualified, setting a filling well part at the upper end of the filling pipe, taking the filling point as a permanent maintenance filling point, and taking the earth surface as well part protection.
The invention has the following advantages: 1. the high-pressure filling pipe is synchronously pre-buried in the horizontal and vertical grounding bodies in the newly-built lightning protection grounding construction, the increased cost is low, the foundation is laid for later maintenance, and the maintenance of the grounding grid can be efficiently completed without secondary groove digging in the later period.
2. The lightning grounding maintenance of the traditional construction process adopts the fixed-point high-pressure pouring of electrolyte or slurry-shaped delustering agent into the horizontal/vertical grounding body, the maintenance and the upgrade are completed under the condition of not digging a grounding groove, the construction cost is saved, and the maintenance efficiency is improved. Meanwhile, the lightning protection grounding completes upgrading and reconstruction, and provides greater convenience for subsequent maintenance.
3. Compared with a natural penetration mode, the high-pressure filling mode enables the penetration depth and the penetration width of electrolyte or conductive liquid into soil to be larger, and greatly shortens the penetration time. The small area of the lightning protection grounding field adopting the high-pressure pouring construction process of the horizontal/vertical grounding body can achieve the grounding performance of the large area of the traditional process, and the cost is saved by reducing the construction engineering amount and the maintenance amount.
4. The lightning grounding construction adopting the method of the invention has the advantages of convenient later maintenance, small maintenance work amount, low construction and maintenance cost, high maintenance efficiency and repeated maintenance for many times.
Drawings
FIG. 1 is a schematic structural diagram of a horizontal/vertical construction method of a newly-built lightning protection grounding field in the invention.
Fig. 2 is a schematic structural view of a conventional lightning protection ground field maintenance construction method according to the present invention.
As shown in the figure: 1-1 parts of metal horizontal grounding body, 1-2 parts of metal vertical grounding body, 1-3 parts of,
A horizontal plastic filling pipe, 1-4,
1-5 parts of a vertical plastic filling pipe, 1-6 parts of a filling pipe dredging crack or hole, 1-6 parts of a filling well protruding out of the ground surface or embedded in the ground, 1-7 parts of a filling well cover, 1-8 parts of a filling pipe quick joint, 1-9 parts of a filling pipe plastic fixing support, 1-10 parts of a horizontal grounding test point, 1-11 parts of a vertical grounding body test point, 1-12 parts of a ground plane;
2-1 parts of metal horizontal grounding body, 2-2 parts of metal vertical grounding body, 2-3 parts of,
2-4 parts of vertical filling pipes, 2-4 parts of filling pipe dredging cracks or holes, 2-5 parts of protruding or embedded filling wells, 2-6 parts of filling well parts, 2-7 parts of filling pipe quick-connection joints, 2-8 parts of high-pressure thick-wall steel pipes, 2-9 parts of high-pressure filling paste-shaped degrading agents or liquid electrolyte (wrapping the periphery of a horizontal grounding body), 2-10 parts of high-pressure filling electrolyte or liquid conductors to form a large-area permeation diffusion area, 2-11 parts of horizontal grounding body test points, 2-12 parts of ground planes.
Detailed Description
The present invention will be described in further detail with reference to examples.
The construction method comprises a newly-built lightning protection grounding field construction method and a lightning protection grounding field maintenance construction method built by adopting a traditional method, wherein the newly-built lightning protection grounding field construction method comprises a lightning protection grounding horizontal grounding body construction design and a lightning protection grounding vertical grounding body construction design, and the lightning protection grounding field maintenance construction method built by adopting the traditional method comprises a horizontal grounding body maintenance construction design and a vertical grounding body maintenance construction design.
The soil permeability formula defines that the permeability is in direct proportion to the magnitude of external force, is in a quadratic parabolic relation with the radius of the circular pipe, and is in inverse proportion to the viscosity coefficient of water.
The construction design of the lightning grounding horizontal grounding body comprises the following steps:
(1) after the trench is dug, filling yellow soil or clay with the thickness of 100mm into the bottom layer of the trench, and uniformly spreading to provide a good soil environment for laying a horizontal grounding body;
(2) horizontally arranging horizontal grounding flat steel or flat copper along the central line of the groove, placing the horizontal grounding flat steel or flat copper on backfill, welding or hot melting butt joint a grounding body joint, and performing anti-rust treatment on a welding position;
(3) the plastic buckles are arranged on the horizontal flat steel at intervals of 1-1.5 meters, and the 4-minute PE polyethylene filling pipe is fixed on the horizontal grounding body along the horizontal grounding body buckles;
(4) four holes with the diameter of 2MM are drilled on the periphery of the polyethylene filling pipe at intervals of one meter and are uniformly distributed at an angle of 90 degrees to serve as high-pressure filling liquid dredging holes, the length of each pipe is controlled within 100 meters, the far end of each pipe is permanently sealed by an end socket, the near end of each pipe is butted by a copper joint, a metal belt is firmly bound, and a horizontal grounding body is used as a dredging pipe for later-stage high-pressure filling;
(5) fixing a polyethylene dredging pipe, paving the slurry-like resistance reducing agent along the horizontal grounding body and the periphery of the dredging pipe, wrapping the horizontal grounding body, enlarging the contact area through the resistance reducing agent, enlarging the drainage area, and determining the use amount of the resistance reducing agent according to the soil texture and ground resistance condition;
(6) spreading the resistance reducing agent, uniformly watering and permeating for many times, and continuously supplementing the resistance reducing agent until a good test effect is achieved;
(7) when the trench soil is backfilled, the end of the perfusion dredging pipe led out of the ground is provided with an inspection well part, and the polyethylene filling pipe is led out of the ground from the well part and is provided with a blue protective cover;
(8) screwing off a copper seal head of a polyethylene filling pipe for a ground network to be maintained, butting a conduit joint of a high-pressure filling pump, filling the mixed electrolyte into a dredging conduit by the high-pressure filling pump at high pressure, and expanding and permeating the electrolyte to the periphery in a large range by high pressure;
(9) later stage high pressure filling pump directly fills electrolyte or conducting liquid at high pressure, accomplishes maintenance, and is simple high-efficient.
The standard width of the trench digging is 0.5-0.8 meter, the depth is 0.6-1 meter, and the specific size is determined according to the construction site condition and the soil resistivity.
The horizontal grounding flat steel or flat copper adopts national standard 40 × 4 and 50 × 5 hot galvanizing flat steel or copper strips, and has strong attachment resistance and good conduction performance.
The PE polyethylene plastic pipe is a national standard pipe, the pipe diameter is 4 centimeters, and the pipe wall bears more than 12 kilograms of pressure.
The resistance reducing agent adopts a long-acting physical resistance reducing agent, mainly adopts graphite, bentonite, conductive cement and the like, the viscosity is adjusted into paste, and a moisturizing slow-release material is added.
The electrolyte adopts an environment-friendly high-carbon compound, conductive graphite and an electrolytic ionization compound, and has low resistance and good conductivity.
The electrolyte can be made of different materials according to different requirements of soil property and ground resistance, and the electrolyte salt with different conductivity and viscosity can be prepared according to the requirements to meet the design requirements.
The maintenance of large engineering quantity such as secondary groove digging and the like is avoided 30 years before the hot galvanizing flat steel grounding body or the copper grounding body is not corroded and broken, the maintenance construction cost is saved, and the efficiency is improved.
And (5) when the resistance reducing agent is paved on the horizontal grounding body in the step (5), a high-pressure filling pump is adopted to fill and encapsulate the paste resistance reducing agent along the whole horizontal grounding body, or 400 × 500 × 60 resistance reducing agent modules are formed at intervals of 5 meters by high-pressure filling, and the nonmetal grounding modules are formed by field filling.
The construction design of the newly-built lightning grounding vertical grounding body comprises the following steps:
(1) selecting a grounding body: selecting a copper-clad steel grounding body, an angle iron grounding body, a galvanized pipe or a common electrolytic ion grounding body according to the cost, such as a pure copper rod grounding body, an angle iron grounding body, a galvanized pipe, a common electrolytic ion grounding body and the like;
(2) selecting a grounding body, drilling a deep hole with the diameter of 100-;
(3) after the grounding hole is processed, a grounding rod is put into the hole, the exposed length is suitable for being welded with a horizontal grounding body, a red copper pipe dredging pipe is inserted to serve as an electrolyte high-pressure permeation pipe, a bottom end socket is sealed, permeation holes are drilled in a staggered mode around the horizontal grounding body from bottom to top at intervals of 100mm, the diameter of each permeation hole is 2mm, the permeation holes are not drilled from the surface to the ground surface, a hot galvanizing manhole part is adopted on the ground surface, the design of a red protective cover is adopted, and the depth is 140 mm and 160mm higher than the ground surface;
(4) the paste resistance reducing agent or the high-efficiency ion filler is poured into the grounding hole, and the hole opening is tamped by using the viscous soil at a position 500mm away from the ground, so that the paste resistance reducing agent or the high-efficiency ion filler is prevented from bulging out during high-pressure pouring;
(5) after the grooves of the vertical grounding body and the horizontal grounding body are backfilled, 5-10 liters of electrolyte is filled into the red copper dredging pipe at high pressure after the embedded resistance reducing agent is stabilized, so that the conductive ions of the soil around the vertical grounding body are diffused in a large area, the width and the depth of the drainage are expanded, and the drainage capacity is improved;
(6) the high-pressure filling pump is butted during later maintenance, electrolyte is directly filled at high pressure, maintenance is completed, and the device is simple and efficient.
The above explanation is the innovation and improvement on the lightning protection grounding horizontal grounding body construction design and the lightning protection grounding vertical grounding body construction design process and method of the newly-built grounding system, and other construction procedures are also constructed in strict conformity with the industry-approved lightning protection grounding construction specifications, such as embedding resistance reducing agent, backfilling and the like. The two points are modified and innovated, and a high-pressure perfusion permeation mode is realized by combining a high-pressure perfusion pump. The newly constructed grounding system has good maintainability, meanwhile, the maintenance cost is reduced, the maintenance effect is improved, and the maintenance period is shortened.
The maintenance construction design of the horizontal grounding body constructed by adopting the traditional method comprises the following steps:
(1) determining the specific position and the pre-buried depth of the horizontal grounding and the adopted grounding body material according to a construction drawing, performing electronic measurement positioning before construction, determining the specific trend of the horizontal grounding through an underground metal positioning instrument, and making a ground surface mark;
(2) measuring the ground resistance value, designing construction points according to the ground resistance value, drawing a construction drawing, marking on the right side or the side 100mm of the horizontal grounding body, and distributing the interval points according to the ground resistance value by 5-10 meters;
(3) a drilling machine is adopted to vertically drill holes at the mark points, the diameter of the drill bit is 12-20mm, the length of the drill bit reaches 100-200mm below the grounding body, and the direct contact is better;
(4) inserting a metal filling pipe into the ground hole to serve as a high-pressure filling pipe, tamping and plugging the metal filling pipe with 100-300mm thick viscous soil close to the ground surface, and sealing;
(5) the high-pressure filling pump is inserted into an underground filling pipe to be butted with a high-pressure filling pump joint, and the high-pressure filling pump is used for filling the well-adjusted resistance reducing agent to the underground horizontal grounding body accessory. By high-pressure injection, the filler expands and diffuses near the horizontal grounding body, is in contact conduction with the horizontal grounding body and is in deep contact with soil, so that the contact area of the grounding body is enlarged, conductive ions penetrate into the soil to enhance the conductivity of the soil, and the grounding resistance value is reduced;
(6) inserting a quick connector and a filling well kit into the underground metal filling installation to serve as a filling point for later-stage maintenance and filling of electrolyte;
(7) and in the later maintenance, the method is still adopted, so that the secondary maintenance of the grounding body is realized under the condition of not moving earthwork, the grounding resistance value is reduced, the conductivity of soil is improved, and the drainage capacity is enhanced.
The metal filling pipe is connected with an original grounding system through conductive materials such as galvanized flat iron, copper strips and the like.
The maintenance construction design of the vertical grounding body comprises the following steps:
(1) after the vertical grounding body is positioned, drilling a deep hole along the vertical grounding body within 100mm by using a drilling machine, wherein the diameter is 20-40mm based on more than 2m, and the depth of the bottom of the hole is better than that of the vertical grounding body;
(2) inserting a copper tube with a prepared end socket and a prepared connector into the hole, enabling the copper tube to reach the bottom of the hole in length, performing sealing hole treatment on the lower side of the ground surface by 500mm, and preparing preset pouring tubes;
(3) according to different design requirements, different fillers are selected to be filled with a certain amount of fillers under high pressure, and clear water, electrolyte, paste drag reducer and the like are adopted, so that the conductivity of soil around the grounding body is improved, and the discharge capacity of the grounding body is improved;
(4) the limit is measured and is filled, stops filling after qualified, fills the pipe upper end and has set up the well spare that fills, and this filling point is as permanent maintenance filling point, and well spare protection is done to the earth's surface, makes things convenient for the later stage again to this perpendicular grounding body's maintenance.
The vertical grounding body perfusion filler mainly takes liquid as main material, and can be selected from electrolyte, electrolytic salt, a water and graphite mixture and the like to permeate and extend to soil around the grounding body; the metal filling pipe is connected with the original grounding system by conductive materials such as galvanized flat iron, copper strips and the like.
The traditional construction process has the advantages that a high-pressure filling permeation mode is adopted for maintaining the grounding system, water/electrolyte/slurry resistance reducing agent is directly filled into soil around the grounding body in a high-pressure mode through a high-pressure filling pump, the maintenance, upgrading and maintenance of the grounding system are realized under the condition that grooves are not dug for the second time, the construction cost is saved, the construction efficiency is improved, and the maintainable grounding system is upgraded.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The lightning protection grounding construction method which does not need secondary groove digging and sustainable maintenance is characterized in that: the construction method comprises a newly-built lightning protection grounding field construction method and a traditional lightning protection grounding field maintenance construction method, wherein the newly-built lightning protection grounding field construction method comprises a lightning protection grounding horizontal grounding body construction design and a lightning protection grounding vertical grounding body construction design; according to the traditional lightning protection ground field maintenance construction method, a high-pressure perfusion permeation mode is adopted, water/electrolyte/slurry resistance reducing agent is directly perfused into soil around a grounding body at high pressure through a high-pressure perfusion pump, and maintenance upgrading and maintenance of a grounding system are realized without secondary groove digging;
the construction design of the lightning grounding horizontal grounding body comprises the following steps:
(1) after the trench is dug, filling yellow soil or clay with the thickness of 100mm into the bottom layer of the trench, and uniformly spreading;
(2) horizontally arranging horizontal grounding flat steel or flat copper along the central line of the groove, placing the horizontal grounding flat steel or flat copper on backfill, welding or hot melting butt joint a grounding body joint, and performing anti-rust treatment on a welding position;
(3) the plastic buckles are arranged on the horizontal flat steel at intervals of 1-1.5 meters, and the 4-minute PE polyethylene filling pipe is fixed on the horizontal grounding body along the horizontal grounding body buckles;
(4) four holes with the diameter of 2mm are drilled on the periphery of the polyethylene filling pipe at intervals of one meter in a staggered mode and are uniformly distributed at an angle of 90 degrees to serve as high-pressure filling liquid dredging holes, the length of each pipe is controlled within 100 meters, the far end of each pipe is permanently sealed by a sealing head, the near end of each pipe is butted by a copper joint, a metal belt is firmly bound, and the polyethylene filling pipe filled with high pressure in the later period is manufactured on a horizontal grounding body;
(5) fixing the polyethylene filling pipe, paving the slurry-shaped resistance reducing agent along the horizontal grounding body and the periphery of the polyethylene filling pipe, and wrapping the horizontal grounding body;
(6) spreading the resistance reducing agent, uniformly watering and permeating for many times, and continuously supplementing the resistance reducing agent;
(7) when the trench soil is backfilled, a polyethylene filling pipe is poured and led out of the ground, an inspection well part is arranged at the end, leading out of the ground, of the polyethylene filling pipe, and the polyethylene filling pipe is led out of the ground from the well part and is provided with a blue protective cover;
(8) screwing off a copper seal head of a polyethylene filling pipe for a ground network to be maintained, butting a conduit joint of a high-pressure filling pump, and filling the well-mixed electrolyte into the polyethylene filling pipe at high pressure by the high-pressure filling pump;
(9) and the later-stage high-pressure filling pump directly fills electrolyte or conductive liquid at high pressure to finish maintenance.
2. The lightning grounding construction method without secondary trench digging and sustainable maintenance of claim 1, wherein when the resistance reducing agent is spread on the horizontal grounding body in the step (5), a high pressure filling pump is used to fill and encapsulate the paste resistance reducing agent along the horizontal grounding body as a whole, or 400 x 500 x 60 resistance reducing agent modules are formed by high pressure filling every 5 m.
3. The method of claim 1, wherein the design of the lightning grounding body comprises the following steps:
(1) selecting a grounding body: selecting a copper-clad steel grounding body, an angle iron grounding body, a galvanized pipe or a common electrolytic ion grounding body according to the cost;
(2) selecting a grounding body, and drilling a deep hole with the diameter of 100-;
(3) after the grounding hole is processed, a grounding rod is put into the hole, and a red copper dredging pipe is inserted into the hole to serve as an electrolyte high-pressure permeation pipe, a bottom end socket is sealed, permeation holes are formed in a staggered mode at the interval of 100mm from bottom to top, the diameters of the permeation holes are 2mm, the permeation holes are higher than the grounding rod and do not punch on the earth surface, a hot galvanizing workover rig is adopted on the earth surface, the design of a red protective cover is adopted, and the permeation holes are 140 mm and 160mm higher than the earth surface;
(4) filling a paste resistance reducing agent or a high-efficiency ion filler into the grounding hole, and tamping a hole opening by using clay at a position 500mm away from the ground;
(5) after the grooves of the vertical grounding body and the horizontal grounding body are backfilled, 5-10 liters of electrolyte is filled into the red copper dredging pipe at high pressure after the embedded resistance reducing agent is stabilized;
(6) and (4) butting a high-pressure filling pump during later maintenance, directly filling electrolyte at high pressure, and finishing maintenance.
4. The lightning protection grounding construction method capable of continuously maintaining and maintaining without secondary trenching as claimed in claim 1, wherein the horizontal grounding body maintenance construction design comprises the following steps:
(1) determining the specific position and the pre-buried depth of the horizontal grounding and the adopted grounding body material according to a construction drawing, performing electronic measurement positioning before construction, determining the specific trend of the horizontal grounding through an underground metal positioning instrument, and making a ground surface mark;
(2) measuring the ground resistance value, designing construction points according to the ground resistance value, drawing a construction drawing, and marking on the right side or the side 100mm of the horizontal grounding body;
(3) vertically drilling holes at the mark points by using a drilling machine, wherein the diameter of a drill bit is 12-20mm, and the length of the drill bit reaches 100-200mm below the grounding body;
(4) inserting a 3-minute steel pipe into the hole to serve as a high-pressure pouring guide pipe, tamping and plugging the hole by using viscous soil at a distance of 100-300mm away from the ground surface, and sealing the hole;
(5) inserting an underground high-pressure perfusion conduit to butt joint a perfusion joint of a high-pressure perfusion pump, perfusing the adjusted filler to the vicinity of the underground horizontal grounding body by the high-pressure perfusion pump, and diffusing the filler in the horizontal grounding body accessory through high-pressure perfusion, and contacting and conducting the filler with the horizontal grounding body and contacting with the soil deeply;
(6) the perfusion volume of each perfusion point is determined according to the ground resistance measurement value and the soil condition;
(7) and later maintenance, namely secondary maintenance of the grounding body is realized under the condition of no earth movement.
5. The lightning protection grounding construction method capable of continuously maintaining and maintaining without secondary trenching as claimed in claim 1, wherein the vertical grounding body maintenance construction design comprises the following steps:
(1) after the vertical grounding body is positioned, drilling a deep hole within 100mm of the vertical grounding body by a drilling machine, wherein the diameter is 20-40mm with more than 2 meters as the standard;
(2) inserting a copper tube with a prepared end socket and a prepared connector into the hole, enabling the copper tube to reach the bottom of the hole in length, performing sealing hole treatment on the lower side of the ground surface by 500mm, and preparing preset pouring tubes;
(3) selecting different fillers according to different design requirements for high-pressure filling of the fillers;
(4) and (4) measuring and filling, stopping filling after the measurement is qualified, setting a filling well part at the upper end of the filling pipe, taking the filling point as a permanent maintenance filling point, and taking the earth surface as well part protection.
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| CN201294271Y (en) * | 2008-10-21 | 2009-08-19 | 吕良 | Grounding device capable of monitoring low resistance module |
| JP2011258529A (en) * | 2010-06-11 | 2011-12-22 | Chugoku Electric Power Co Inc:The | Grounding electrode of grounding resistance reducer injection method and grounding construction method using the same |
| CN102412447A (en) * | 2010-09-26 | 2012-04-11 | 吴兴杰 | Intelligent ion grounding system |
| CN102610935B (en) * | 2012-03-31 | 2013-12-25 | 云南省昆明农业气象试验站 | Soil non-excavation grounding resistance reduction method |
| CN102904141A (en) * | 2012-10-30 | 2013-01-30 | 山东电力集团公司烟台供电公司 | Resistance reducing device for ground grid |
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