防雷接地施工方案(英文版).docx

Lightning protection grounding construction scheme

Preparation: Jiang da auspicious

Reviewer: Xia Chengyou

The approver Yang Rong

Unit: HuaRen construction group co., LTD

The first chapter project summary
一、Basic situation of engineering,
This project is located in zhongshan city god bay town rainbow building knife island, a four layer yacht entry-exit inspection do comprehensive public building construction, building a total height of 11.9 m.
Engineering basic information table:
The name of the project
The yacht entry-exit inspection building
The construction site
Sharpen shen wan town, zhongshan city rainbow road island
The construction unit
Zhongshan millennium Marine co., LTD
Architectural design of the unit
Architectural design institute co., LTD., zhongshan city, guangdong province
Theconstructionsupervising units
Zhongshan torch in supervision consulting co., LTD
Qualitysupervisiondepartment
Zhongshan city construction engineering quality surveillance
Theconstruction time limit for a project
180 days
The overall contractors
HuaRen construction group co., LTD
Professional construction unit

Zhongshan city in hydropower room decoration co., LTD

二、Lightning protection grounding profiles
The project according to the second class building lightningproof grounding design, roof lightning protection zone, downlead, earthing device and embedded parts are associated with the building structure by heavy current professional responsible for completing the subcontract unit. The contractor is responsible for the coordination, cooperation and management of subcontractors grounding work.
Lightning protection grounding system include:
The name of the item
Overview features
Lightning protection zone
The building roof set not greater than 10 x10m or 12 x8m lightning protection network. Glass curtain wall at the top of the metal frame must be connected with the lightning protection belt. On the roof of all metal bossed, ventilation pipe and so on lightning protection belt connected with the roof, a total 12 0.6 meters tall, small flash needle. Roof electrical wiring in steel pipe and instead of distribution box, electrical equipment, metal casing connection, and connected to the lightning protection device to the nearest.
Down lead
This project use the column diagonal two root diameter greater than or equal to 16 main reinforcement jumper as down lead as lightning protection downlead welding. All down lead spacing is not more than 12 m and down lead and roof lightning protection devices must follow basic ground net.through forming pathway, the grounding resistance is not greater than 1.
Equipotential connection
Layer distribution room set total equipotential terminal box, distribution box for a layer, low voltage room, all grounded in the structure of the metal pipes.
Basic grounding
Bottom moderators reinforcement and foundation reinforcement is used as the grounding device. Electrical grounding, security, lightning protection grounding and other weak current systems share the grounding device. Joint earthing system grounding resistance shall not be greater than 1, in the position of the need to lead to ground connection panel, set on the outside of partly on the ground down lead test terminal.
Lightning protection waves invasion

All information and weak current equipment room and downlead post keep a certain distance, and shielding, grounding and equipotential connection, installing overvoltage protection within the system. The low voltage into line ark and day face equipment distribution box, information and weak current equipment room power box, and other information equipment power box are set a surge protector.

The second chapter compilation basis
A, contract documents, and local laws and regulations
1, the lightningproof grounding engineering drawings.
2, project contract documents.
3, the People's Republic of China promulgated by the current effective electrical engineering all kinds of rules, norms and test evaluation standard.
4, the corresponding industry standard, main laws, regulations and regulatory documents.
5, the people's government of guangdong province management on construction projects, municipal administration, environmental protection and other laws and regulations.
6, ISO9000 quality management system, ISO14000 environment management system, OSHMS18000 occupational safety and health management system standard, my company's quality, environment and occupational safety and health management manual, program files and its supporting documents.
7, at the national level method and the enterprise can recommend focus on promotion of new technology and ministry of construction
Second, the main standards, specifications, documents
The name says
Make no.
"The green building evaluation standard"
GB / t50378 - 2014
The project management of construction engineering
GB/t50326-2006
The building engineering construction quality evaluation standard"
GB/t50375-2006
The construction quality acceptance of building electric installation engineering
GB50303-2002
The electrical device installation and acceptance specification for construction of grounding device
GB50169-2006
The building electronic information system lightning protection technology specification"
GB50343-2012
The building lightning protection engineering construction and quality acceptance specification"
GB500601-2010
"Public building energy efficiency design standard"
GB50189-2005
"Civil building design specification"
JGJ16-2008
"Urban regional environmental noise standards"
GB3096-93
Construction machinery use safety technical specifications
JGJ33-2012
Construction site temporary electricity safety technical specifications
JGJ46-2014
Working construction of higher safety technical specifications
JGJ80-1991
"The building electrical engineering construction technology standard"
ZJQ00-SG-006-2003
"The building electrical common data"
04DX101-1
Atlas of the lightning protection and grounding installation
D501-1~4
Atlas of building electrical general (lightning protection and grounding device)
92DQ13
The third chapter construction method
The construction sequence
Material preparation and material acceptance - base earthing body welding - column NaZhu reinforcement to the layers of steel welding, welding roof lightning protection network (pin) - grounding resistance test - transfer welding
First, the overall deployment
The whole process of lightning protection construction with civil engineering structure, according to the civil engineering structure construction section thought lightning protection engineering mainly divided into the following stages:
1, the floor construction phase
Insert time for floor construction according to construction progress, for lightning protection foundation construction process should be ground net.through together as a whole. In floor area construction, the edge of the area and other districts junction as lightning protection grounding network in the beam main reinforcement marked with yellow paint, to ensure that the next area with the area reserved by landlord reinforcement construction accurate docking.
2, structure construction stage
Construction stage according to the latest and the examination and approval of lightning protection downlead deepen drawing connections, building lightning protection network welding.
3, lightning protection test in stages
Grounding construction effect, in order to ensure that each stage of construction completion of all lightning protection test, such as the test is not qualified to remedy in a timely manner.
Second, the construction preparation
1, the machine to prepare
Machine name
model
The number of
Ac arc welder
BX1-315
1Taiwan
Cutting machine
CJ-400
1Taiwan
Grounding resistance tester (ZC - 8)
3.0 level，0.1-100Ω
1Taiwan
Vernier caliper
0.02mm/0-300
1 the
Steel tape
0-5m
4 the
Test all equipment comes into play, can be put into use after inspection; All machinery equipment selection
Determined according to the actual situation, to ensure that can form a group work. In a timely manner in the process of construction steel binding insert lightning protection welding construction, ensure the quality and efficient complete welding, does not affect the civil concrete time.
2, personnel ready to
(1) those responsible
Mechanical and electrical department managers and professional quality inspectors as main monitors, mechanical and electrical department manager first responsible for lightning protection grounding construction quality, safety.
(2) the electrical engineer
Requires supervision and guidance of construction personnel for the electrical professional engineers, have the builder certificate and license, grounding construction experience, can detailed technical clarificaiton operating personnel and can guide the construction on site, the control quality.
(3) materials
Is responsible for issuing material inspection and storage in work, ensure all materials used on the site in compliance with national standards and design, the owner, supervision requirements.
(4) welders
Welding operation personnel must hold electrician special work license and welder special type of work license, on the floor and the work high above the welder must, must first be examined before mount guard, to ensure the healthy body rear can mount guard. Welding quality must meet the construction specification and owner, supervision, lightning protection departments acceptance requirements.
All operators must be admission safety education and the construction safety technical disclosure, and access to the construction site for construction only after they have passed the examinations.
3, technical preparation
(1) Grounding the early stage of the construction drawings to deepen design according to requirements of the owners and design units, deepening the design after the completion of the audit submitted to the owner and design institute, approval by the rear can be used as construction drawings.
(2) On the basis of workers on site before the construction drawings disclosure and technical disclosure.
Third, the main construction method
1, the basic ground net
A layer of floor basement layer of the ground net according to have approval on the plane deepen design basis for lightning protection construction, foundation grounding network using ground beam two root diameter greater than or equal to 16 mm steel and 50 * 4 hot dip galvanized flat iron welding forming grounding flat screen.
2, downlead
(1) main reinforcement is used as the down lead inside wall column
The project used the column diagonal two main reinforcement is greater than or equal to 16 mm in diameter as lightning protection downlead, lightning protection downlead with reliable grounding network connection at the bottom and in the main muscle sleeve joint jumper with a diameter of 10 mm round steel. In the process of construction should not only strictly control the welding quality, but also to the value of the main reinforcement as downlead completes the logo with yellow paint, in order to avoid wrong welding short of lightning protection effect. Particular way is shown in figure 1.

3, lightning protection zone
(1） The roof
Roof roof lightning protection network, the use of phi 10 hot dip galvanized steel garden according to have approval to deepen the design drawings of dark apply within the roof top screed-coat, daughter on the wall of the lightning protection dark in the steel structure curtain wall keel laying of roof pressure, and a reliable connection with the steel structure curtain wall keel, all down lead onto the floor, the roof and the lightning protection network and roof and all roof above the metal phase connected.
4, local equipotential connection
This project is using joint grounding method, all Shared grounding device, grounding and lightning protection grounding system common grounding device Ω resistance is not greater than 1. Equipotential connection after the installation guide connectivity test.
(1) Distribution of well, telecom equipment room, high voltage, low, such as pipeline access based on a layer of grounding deepen the position of the diagram in a layer of chassis ground reserved online 40 x 0.3 meters four hot dip galvanized flat steel plate, used by professional contractors.
(2)According to the lightning protection grounding deepening figure marked the location of the reserved 25 * 4 hot dip galvanized flat steel and equipotential connection terminal box of the mouth of the cave, cooperate with civil engineering construction in the late MEB and LEB terminal box installation. Reserved MEB and LEB terminal board and grounding flat steel and reliable connection.
(3) Total equipotential connection terminal board is a distribution box, ark inside layer distribution room; All into the structure of the metal line grounding connection.
5, grounding test
According to design requirements, the construction plan position set grounding test points, to facilitate later every year regularly test. Test points in the building is 500 mm, from outdoor ground test point location and eventually to examination and approval of the underlying grounding deepening figure shall prevail.
Basic grounding network construction after the completion of the grounding resistance test, if can't meet the requirements, timely increase until the grounding body meet the requirements, the main structure completed a grounding resistance test, guarantee the grounding resistance under 1 Ω.
Adopted ZC - 8 grounding resistance tester docking ground resistance measurement, the measured resistance value should meet the design and specification requirements. Each local ground measurement times for at least 3 times, calculate the average data can be considered that point grounding resistance. Connection mode as shown in figure 8.

Four, the main control parameters
1, the joint earthing resistance is not greater than 1 Ω in any season.
2, the distance between the down lead shall not be greater than 12 m.
3, welding length: flat steel and flat steel lap length for larger models is 2 times of the width of the flat steel, three sides welds; Round steel and round steel welding for large type 6 times the diameter of the round steel, double sided welds; Round steel and flat steel lap weld length is 6 times the diameter of the round steel, double-sided welding. Double-sided welded construction do have some difficulty, one-side welding to extend lap multiples for overlap ratio of 2.5 times.
Adopts the round steel structure steel jumper, weld length should be 6 times the diameter of the round steel, double-sided welding.
4, welding parameters monitoring
(1） welding parameters:
Power supply voltage: ~ 380 v