Part I: Project Overview
This project is the outpatient building project of Dongping County People's Hospital, a frame structure with a floor area of 18,000 square meters, one floor underground and six floors above ground. Among them, the first underground floor is a garage, the first to fourth floors are outpatient clinics, and the fifth and sixth floors are office buildings. Electrical installation is divided into the following systems:
(a) Low-voltage distribution system:
1, the project in the building on the first floor of a 10KV substation, using two 10KV line power supply
Electricity, respectively, from different upper substation. When a power supply maintenance or failure, the other power supply for all primary and secondary loads of electricity. The substation room is designed separately.
2, the project power for 380/220 three-phase four-wire (plus PE) line, from the substation room to lead out.
3. Lighting trunking adopts trunking distribution system. Switching from the lighting and backup trunk to the distribution box on each floor, the backup power supply is used for the equipment other than air-conditioning.
4, radiology equipment (CT room, intervention room, nuclear magnetic **** vibration, X-ray room) powered by a dedicated transformer, using a radial distribution system.
5. Fire shutter, fire pump, smoke exhaust fan, fire fighting equipment in the duty room adopts dual power supply local switching radial distribution system.
6, the lighting trunk line adopts copper core cross-linked cable to lead to the electrical pipe well and distribution box along the bridge in the ceiling. The power supply of fire-fighting equipment adopts fire-resistant cable to be laid openly to the distribution box.
(2), lighting system:
1, the project lighting system includes normal lighting, emergency lighting, night lighting.
2, normal lighting design illumination standards: observation room 100lx, waiting room, lounge: 200lx; consultation room, treatment room, duty room, conference room, office 300lx; laboratory, pharmacy, CT room, MR room 500lx; operating room, rescue room 750lx; corridor lighting 50lx.
3, wards, observation rooms, etc., using three-color energy-saving lamps. base color energy-saving lamps, corridor energy-saving fluorescent lamps.
4, the foyer and the passageway with emergency evacuation lighting system for night guard lighting. Emergency evacuation sign lights for AC and DC type.
5, the project adopts a centralized power supply type emergency lighting system, each layer of DC centralized emergency power supply, DC centralized emergency power supply for evacuation lighting power when the utility power failure. Fire should have a mandatory open function.
6, all fluorescent lamps take electronic ballast.
7, corridor lighting socket branch line using plastic copper wire along the bridge laying mode, to the room through the steel pipe concealed. Emergency lighting lines using fire-resistant wire through the steel pipe laying method.
(C), lightning protection devices:
1, the project according to the second type of lightning protection building design.
2, the use of lightning belt as a flasher, the use of columns in the main bar for the lead wire, the use of the foundation of the steel for the grounding body. Utilized steel should be welded.
3, the roof of various metal structures and electrical equipment shells should be connected to the lightning protection device.
4, integrated grounding resistance should be less than 1 ohm.
5. Over-voltage protection devices are installed at the power lines introduced into the building.
(D), grounding system:
1, safety protection grounding method using TN-S system.
2, electrocardiogram room, operating room and other local equipotential connection system.
3, the total grounding terminal, grounding trunk, all kinds of metal pipe inlet for the total equipotential connection. Electrical pipe wells are equipped with -40 × 4 galvanized flat steel grounding trunk.
4, shower room with grounding terminal and grounding trunk connection, should also be local equipotential connection.
5, system grounding resistance should be less than 1 ohm.
(E), fire protection system (including automatic fire alarm system, fire control system, fire broadcasting communication system), integrated wiring network and telephone communication system, cable television, broadcasting and call system, television monitoring system are only pre-buried wire pipe, no threading.
Part II: construction of the overall deployment
1, the project staffing:
Project Manager:
Technical Manager:
Project Professional and Technical Manager:
Project Professional and Technical Manager:
Project Professional and Quality Assurance:
Construction staff:
Resourcer:
Source material:
Profiler:
Budgeting:
Preparator:
Preparation:
Preparation:
Electrical team leader:
Pipeline team leader:
2, construction period target: construction period is reasonably arranged in the civil construction period target, and strive to improve the cross operation, to ensure that the completion of the delivery of the use on time.
3, quality management objectives, quality system:
Establishment of ISO9002-2000 version of the quality assurance system, the implementation of the target management of the sub-projects, to the implementation of the organization and the establishment of job responsibility system to ensure that the management of the overall quality objectives. Project Manager Department in strict accordance with the standards of the quality system to implement the management responsibilities to the overall quality management as the center, the implementation of the whole process of the project, all-round management to ensure that the project to achieve first-class contracting management, first-class civilized construction, first-class quality of the project and first-class construction speed, high standards and high quality to complete the project.
4, labor force plan:
The foundation stage is equipped with 8 electricians, including 4 skilled workers, to carry out on-site installation of temporary electricity and grounding poles and basement piping work. The main stage is equipped with 16 electricians, including 10 skilled workers, 6 strong workers, with the civil engineering to carry out the work of pre-burial and so on. The decoration stage is equipped with 31 electricians, including 22 skilled workers, to carry out the installation and debugging of electrical equipment.
Part III: technical measures for the construction of major sub-projects
I. JDG pipe cast-in-place roof construction
1, working conditions
(1), civil engineering completed the top plate, beam supporting mold;
(2), beam reinforcement bar binding is completed;
(3), cast-in-place plate bottom reinforcement bar binding is completed, the upper layer of reinforcement bar before the binding.
2, material requirements
(1) appearance check steel pipe wall thickness uniformity, weld uniformity, no splitting, burr sand, prongs and concave flat and other defects;
(2) threaded pipe joints, straight pipe joints, elbow joints intact shape, clear wire buckle. No warping and deformation and other defects;
(3) Iron light box, switch box, etc., the thickness of the metal plate must comply with the technical specifications provided by the manufacturer.
3, construction equipment
Pencil, tape measure, hammer, burin, hacksaw, saw blade, special pipe bender, buckler, pressure case, tools
bags, electricians commonly used tools.
4, quality requirements:
Quality requirements in line with the "Building Electrical Engineering Construction Quality Acceptance Code" (GB50303-2002).
Items Item Allowable deviation or allowable value
Main control items 1 Metal conduit, metal trunking grounding or zero connection Article 14.1.1
2 Metal conduit connection Article 14.1.2
3 Explosion-proof conduit connection Article 14.1.3
4 Insulated conduit embedded in the masonry ticking trench Article 14.1.4
General items 1 Bend radius of cable conduits Clause 14.2.3
2 Corrosion protection of metal conduits Clause 14.2.4
3 Height of conduit openings in cabinets, benches, boxes and trays Clause 14.2.5
4 Depth of burial of concealed conduits, fixing of open conduits Clause 14.2.6
5 Fixing of trunking and appearance checking Article 14.2.7
6 Connection, earthing, fixing and corrosion protection of explosion-proof conduits Article 14.2.8
7 Connection and protection of insulated conduits Article 14.2.9
8 Lengths of flexible conduits, connection and earthing Article 14.2.10
9 Handling of conduits and trunking at deformed joints in buildings Article 14.2.11<
5, process
Delineation of the location of the light head box → fixed light head box → laying pipeline → pipeline connection, cutting and bending → deformation joints of the treatment
6, the operation process
including the connection of the pipeline and the pipeline and the box of the connection of two kinds of cases:
(1), the connection of the pipeline and the pipeline, the straight line of the pipeline to use the matching straight Pipe connector connection, the pipe interface should be in the center of the straight pipe connector
, that is, the connector is inserted into place. According to the piping requirements using 90 ° right-angle elbow fitting, the pipe should be inserted into the socket of the right-angle elbow, and inserted in place. Then tighten the nut.
(2), the pipeline and the box connection, using matching claw-type threaded fittings, one end of the connector according to the above connection
methods and pipeline connection, the other end of the use of special wrenches and the box locking, claw-type root female mouth guards should be intact in order to ensure that a good grounding of the electrical pathway, and do not have to weld across the grounding wire.
7, other requirements
(1), the pipeline lasso: do not need to lasso.
(2), the bending of steel pipe: the use of special pipe bender.
(3), the corrosion of the pipeline: pipeline inside and outside the wall of the galvanized do not need to do anti-corrosion treatment.
Two, ceiling JDG pipe construction
1, general requirements
Pipe laying in the ceiling according to the design requirements of the correct choice of pipe.
(1), can be fixed closed ceiling according to dark piping. These parts in addition to the junction box of the lamp itself,
should not be installed junction box, due to line branching and so on must be added to the box, should be left to check the hole. Ceiling mounted junction box must be fixed separately, its orientation should be easy to access and wiring.
(2) ceiling piping, direction, bracket fixed according to the requirements of open piping construction.
(3) in the ceiling from the junction box to the lamps and lanterns of the lamp-head line pipe material according to the material of the pipeline laying the same
protection of the material of the hose, the length of its protective hose in the power project does not exceed 0.8m, in the lighting project does not exceed 1.2m (the project for the JDG pipe, should be selected with metal hose).
(4) the top of the pipeline laid in the junction box into the junction box, its internal and external should be equipped with locking mother fixed.
(5) ceiling piping should be maintained with other professional piping minimum distance:
When the piping is laid in the hot water pipe below 0.2m, above 0.3m.
When the piping is laid in the steam pipe below 0.5m, above lm.
When the above requirements can not be met, should be taken to take thermal insulation measures for the steam pipe, on the thermal insulation measures, the upper part of the steam pipe, the upper part of the steam pipe, the upper part of the steam pipe, the upper part of the steam pipe should be equipped with locking. Measures of steam pipe, on and off the clearance can be reduced to 0.2m.
Wire line and other piping parallel clearance should not be less than O.lm. When laid with the same side of the water pipe, it is appropriate to lay in the upper part of the water pipe.
(6) pipe laying should minimize the junction box, only when the pipe is long or curved (except for the pipe into the box at the bend)
To allow the installation of junction boxes or enlarge the pipe diameter. Horizontal laying of pipes, junction boxes should be spaced in accordance with the following requirements:
No bend in the pipe, not more than 30m;
Two junction boxes between a bend, not more than 20m;
Two junction boxes between two bends, not more than 15m;
Two junction boxes between the bends, not more than eight m.
Third, the pipe Threading
1, operating conditions
According to the current national standards, "building electrical engineering construction quality acceptance provisions" (GB50303-2002) of the provisions of the: pipe threading in the building plastering, painting and ground works to be carried out after the end of the threading wire should be protected before the wire pipe water and debris cleaned up. But for the gradual increase in the construction of electrical installation projects, the amount of work in the pipe threading increased, in order to synchronize with the completion of the project as a whole, the pipe threading can be carried out ahead of time, but must meet the following conditions:
(1), good protection of the finished product, box, box and wire should not be damaged and contaminated by mortar.
(2), after threading the line pipe shall not have water and moisture intrusion, must ensure that the wire insulation strength in line with the specification requirements.
2, material requirements
(1), insulated wire: wire specifications, models must meet the design requirements, and should have factory certificates, "CCC" certification mark and a copy of the certificate and production license. Wire into the field to test its specifications, type, appearance and quality of the wire on the logo, and calipers to check whether the diameter of the wire is in line with national standards
(2), mouthpiece: according to the size of the diameter of the tube to choose the appropriate specifications of the mouthpiece.
(3), terminals (wiring nose): according to the number of wires and the total cross-section of the corresponding specifications of the choice of terminals.
(4), auxiliary materials: solder, flux, insulating tape, talcum powder, cloth and so on.
(5) check the wire ` cable specifications are in line with the design requirements, check the cross-section size, insulation layer is in line with current national standards.
(6) The appearance of the cable should be free of distortion and damage.
(7) 1kV cable lines, should use 1000V insulation resistance meter to measure the insulation resistance between the lines and to the ground, and the resistance value shall not be less than 1MΩ.
(8) After the completion of the inspection. The results will be faithfully archived, the collection of factory certificates and factory inspection reports and other quality documents are organized and archived.
3, the main equipment
Silk pliers, sharp-nosed pliers, wire strippers, crimping pliers, electrician's knife, a word and crosses, multimeter, megohmmeter, put
Wire racks, cable cars, high stools, stoves, soldering irons, tin pots, tin buckets, tin spoons, commonly used tools for electricians and so on.
4, quality requirements
Quality requirements in line with the "building electrical engineering construction quality acceptance specification" (GB50303-2002).
Items Item Allowable deviation or allowable value
Main control items 1 AC single-core cables shall not be threaded separately in steel conduit Article 15.1.1
2 Wires threading pipe Article 15.1.12
3 Explosion-hazardous environments for the selection of wires, cables, lighting circuits and threading pipe Article 15.1.3
General Items 1 Wires and cables Pipe cleaning and pipe opening treatment Article 15.2.1
2 Selection of wire insulation color in the same building or structure Article 15.2.2
3 Wire groove laying Article 15.2.3
5. Process flow
Selection of wires → threading of strip wires → sweeping of the pipe → with mouth guard → placing and disconnecting of wires → tying of wires and strip wires → threading of wires in the pipe Conductor connection → joint wrapping → line inspection insulation shake test
6, the operation process
a) Selection of wire
1, according to the requirements of the design drawings, the correct selection of wire specifications, type and quantity.
(2), wear in the tube insulated wire rated voltage is not less than 450 Ⅴ.
(3), the conductor color: in order to ensure the safety and construction convenience, online pipe outlet to the distribution box, panel switch a
section of the trunk circuit and the electricity branch should be color-coded according to the requirements of the color scale color, L1 phase yellow, L2 phase green, L3 phase red, N light blue, PE (protection) for green/yellow dual-color.
b), wear with line
1, threading with φ1.2 ~ φ2.0mm wire, the head bent into a circle without enclosure, in order to prevent the pipe encountered in the pipe joint
head is stuck, will be threaded with the line into the pipeline, in the pipeline at both ends of the residual amount of 20cm.
(2), the pipeline is long or turn, can be laid in the structure of the construction of the pipeline at the same time will be threaded with a good and leave a margin of 20cm
after the two ends of the tape line coiled into a box or wrapped around the header is fixed to prevent the other personnel casually pulled out.
(3), wear the tape line is blocked, the use of both ends at the same time wear the tape line approach, the head of the two tape line bent into a semi-circular shape,
so that the two tape line at the same time stir, so that the two ends of the head of the hooks and strands each other, and then pull out the tape line.
c)
Sweep the pipe
The two ends of the cloth will be firmly tied in the tape line, two people back and forth to pull the tape line, will be inside the pipe of floating rust, dust, mud and water and other debris to remove clean.
d), with the mouth guard
Select the mouth guard according to the size of the pipe mouth, after the pipe is cleaned, the mouth guard will be set into the mouth. In the steel pipe (electrical conduit) before threading, check whether the mouth of the mouth of each tube is complete, if missing or broken should be made up and replaced.
e), put the line and disconnect
(1) line should be based on drawings of the wire species, specifications, quality check.
(2) for the whole disk of wire release, the wire will be placed on the release frame or release car, release line to avoid deadbolt and back flower.
(3) cut the wire, the length of the reserved length of the box wire for 15cm, the length of the reserved length of the box wire for the box circumference
l/2, the length of the reserved length of the wire out of the house for 1.5m.
e), the pipe threading
(1) pipe is long or more turns, the threading should be blown into the pipe at the same time as the appropriate talcum powder.
(2) people threading, a pull and a send, with the coordination.
(3) threading should pay attention to the following issues:
①, different circuits, different voltages and AC and DC wires, shall not be threaded into the same pipe, but the following cases or design of special provisions, except: the voltage of 50 Ⅴ and the following circuits; the same equipment motor circuits and control circuits without the requirements of anti-thousand disturbances; all circuits of the lighting lanterns; lighting of the same kind of several Circuit, can be worn in the same tube, but the total number of wires in the tube should not be more than 8.
②, the same AC circuit wires must be worn in the same steel tube.
3, the wire in the tube shall not have joints and kinks, the joints should be connected in the junction box.
④, the total cross-sectional area of the wire including insulation in the tube should not be greater than 40% of the hollow cross-sectional area of the tube.
5, wire penetration into the steel tube, the mouth should be installed to protect the wire; in the junction box (box) does not enter the vertical pipe mouth, penetrate the wire should be sealed after the pipe enclosure.
There is too much content, put this put not finished, complete you can go to download, in the Lu Wen building services network inside a lot of
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