The blue prints.the design refers to an important activity in which all contractors (the construction unit, the supervision unit and the construction unit) of the project, after receiving the construction drawing design documents from the design institute, are fully and meticulously familiar with the drawings, review the problems and unreasonable situations existing in the construction drawings, and submit them to the design institute for processing.

The blue prints.the design shall be organized and recorded by the supervision unit. Through the joint review of drawings, the contractors, especially the construction units, will be familiar with the design drawings, understand the design intent, grasp the characteristics and difficulties of the project, find out the technical problems to be solved and draw up solutions, and eliminate the problems existing due to design defects before construction.

Organized by the supervision unit, and form two forms of records of the blue prints.the design, each unit should be stamped in the first form.

The blue prints.the design should be decided according to the nature and content of the project. However, in general:

Key points of audit: whether the design drawings and descriptions are complete;

Whether the geometric dimensions, plane position and elevation of the general plan and the construction drawing are consistent, whether the relationship between the construction drawings is consistent, and whether the embedded parts are clearly expressed;

Whether there is a contradiction with the current norms and regulations, whether it is economical and reasonable;

Whether it meets the fire protection requirements, and whether it has the approval opinions of the public security fire department;

Whether the construction safety is guaranteed;

Whether the layout position and elevation of indoor and outdoor pipelines are reasonable;

Requirements of design drawings and whether the construction site can ensure the construction needs;

Suggestions on improving design and construction scheme.

2) Professional review

A. On the basis of design disclosure, each unit shall organize relevant personnel to read the documents carefully according to the specialty and division of labor, so as to further understand the design intent, quality standards and technical requirements;

B. According to the examination contents of this major, check the drawings in detail, ask questions and determine the key points of joint examination.

3) Joint review of contents

A. On the basis of professional review, each unit shall organize professional and technical personnel to discuss, analyze and check the drawings between professions, and check whether there are contradictions or omissions between them;

B. put forward methods or suggestions for handling and solving;

C. Put forward problems and suggestions in written form respectively. The internal problems and suggestions of the supervisor and the construction contractor shall be summarized by the supervisor before the joint review and submitted to the design contractor in time, so that the design contractor can be prepared before the joint review of drawings.

4) Formal joint review

A. The chief supervision engineer shall send a contact sheet to inform the owner, design contractor and construction contractor to jointly examine the construction drawings, indicating the specific time, meeting place and contents of the joint examination;

B. According to the content of joint review, the chief supervision engineer or supervision engineer will organize the construction drawing review meeting and appoint a recorder;

D for projects with relatively complete drawings, the form of meeting → grouping → meeting should be adopted for review. First of all, the designer will answer the questions or suggestions submitted by the supervisor (including the construction party) and some comprehensive questions. Then the design contractor will answer the questions raised by various disciplines or solve the problems through consultation. Finally, the design contractor will answer or negotiate with the design contractor to solve the professional cross-cutting or other new problems raised in the group review.

E the recorder (supervisor) arranges the minutes of the meeting to form a Minute of the Joint Inspection of Construction Drawings, which will be countersigned by the participating units (relevant professionals when necessary), approved by the chief supervision engineer and distributed to all relevant units. The joint review shall be accompanied by a list of construction drawing review questions;

F. If the design contractor needs to change and improve, the design contractor should contact the owner to solve the problem, and the supervisor is responsible for supervision and inspection;

G. For small projects or subdivisional work, the joint review of construction drawings can be conducted in combination with design disclosure;

H the joint review record shall be filed as the technical document of the project.

Key points of joint examination of construction drawings

1) synthesis

A. Check whether all contents of the construction drawing are different from the designated scope approved by the preliminary design review;

B. Check whether the design division of each major is clear, especially whether the connection conditions with equipment suppliers are perfect and whether the design is in place;

C. check whether there are any contradictions, mistakes and omissions among the majors.

2) General drawing

A. Whether the layout is reasonable and has adverse effects on production (use), safety, environmental protection, fire protection and construction;

B foundations of buildings and structures and underground pipelines (water, electricity, gas, ventilation, etc.). ) should be pointed out in the drawings, or at least explained;

C the ins and outs of water, electricity, ventilation, television, gas and roads (coordinates and elevation of junction points) shall be clearly marked. And check whether it is inconsistent with the relevant professional drawings;

D roads, sites, drainage structures and slopes should be unobstructed;

E. For excavated (filled) slopes with large elevation difference around, there should be reliable slope protection facilities.

3) Civil engineering

A. Earthworks

ⅰ should have the original site measured topographic map (including survey results), engineering geology, hydrometeorological data and the location and elevation of underground concealed works or obstacles;

Ⅱ. Drawings of original site soil requiring special treatment and concealed works or obstacles requiring protection or removal shall have clear descriptions and requirements;

Ⅲ site leveling design drawings should have clear boundary coordinates, elevation and surface drainage gradient, and check with the general plan for contradictions or omissions;

Ⅳ Whether the earthwork balance allocation is reasonable; Will earthwork construction have adverse effects on roads, bridges, production, safety and environment along the route?

B. Foundation and foundation engineering

On the basis of detailed understanding of geological exploration data, combined with the upper load, structural form, safety requirements, construction conditions, environmental conditions, economic conditions and other factors, I comprehensively consider whether the foundation treatment method adopted in the design is safe, reliable, economical, reasonable and feasible.

Ii. The design drawings shall specify the quality requirements, detection means and inspection standards that must be met during or after foundation treatment, or the codes, regulations and standards implemented, and put forward the necessary construction technology for the design of special foundation treatment measures;

Ⅲ Whether it is necessary to increase relevant exploration tests in areas with complex engineering geology or buildings sensitive to settlement;

Ⅳ Whether the foundation and foundation construction will adversely affect the buildings, structures, underground pipelines, normal production, life, traffic and safety in or near the site;

ⅴ Whether certain anti-corrosion measures have been taken for the foundation or foundation in the corrosive medium infiltration area;

ⅵ. Whether the basement project attaches importance to the anti-seepage measures of construction joints and post-pouring zones;

ⅶ Check whether there is any mistake or omission in the pile drawing in combination with the upper load transfer.

C. Building structural engineering

1. Check the plane coordinates, dimensions and elevations of buildings and structures, and check the positions and dimensions of reserved holes and embedded parts related to electrical communication (signals), heating and ventilation, water supply and drainage, equipment installation, etc., and check whether there are any mistakes, leaks and embedded parts, and attach detailed drawings;

Whether the structure is reasonable, such as whether there is sufficient theoretical and practical basis, and whether it can ensure safety and reliability if new structures and components are adopted;

Ⅲ Whether buildings and structures in areas with corrosive media need to take certain anti-corrosion measures;

Ⅳ Reinforced concrete structural members should have detailed and complete reinforcement plans, including necessary sections, detailed reinforcement plans of nodes, reinforcement of holes or other parts that need local reinforcement, joint form of reinforcement, thickness of protective layer of reinforcement, etc. The steel bars in the drawings shall be numbered, and attached with steel bar list, steel bar summary table, concrete list, etc.

ⅴ Whether the anti-leakage measures adopted in the design are reasonable for structures with high anti-leakage requirements such as pools, water tanks and basements;

ⅵ Design of parent materials and welding materials (covered electrode, welding calculation, flux, bolts, etc.). ), paint primer and topcoat), the derusting quality grade and welding inspection requirements of steel structure shall be specified;

ⅶ For the welding of special steel, the design shall specify the corresponding technical standards and necessary process performance test requirements.

D. Roof and floor works

I. Whether the selection of roofing waterproof and thermal insulation materials is reasonable, such as the selection of new waterproof and thermal insulation materials must be approved by the statutory inspection department and have sufficient basis for use in this area;

Ⅱ. Detailed drawing of joint treatment of roof waterproof insulation layer at cornice, gutter, gutter, seepage outlet, prefabricated slab flat-fell seam, deformation joint and parapet. It should be clear whether it is reasonable and whether it can be constructed should be carefully studied in combination with the selected waterproof and thermal insulation materials;

Three. Roofing waterproof practices and whether the waterproof materials used have the strain capacity for the tiny cracks in the roof caused by uneven settlement of foundation or temperature stress.

4) Water supply and drainage and HVAC specialty

A. Whether the design documents are complete and clear, and whether there are omissions or errors in the drawings;

B. Whether the design is clear about the construction specifications and standards that should be followed;

C. Review whether the selection and arrangement of equipment, pipelines and pipeline accessories in the drawings are reasonable, reliable and convenient for construction. Operation and maintenance. If new materials, new processes or new equipment are adopted, whether they meet the technological requirements and whether the technical economy is feasible or not, and whether there are problems in the supply of equipment and materials;

D. Check whether the plane size, direction, elevation, pipe diameter and slope in the drawings are correct and clear, and whether the plane, elevation and perspective are consistent;

E. Whether the buried depth and form of the buried pipeline, and the horizontal clear distance and cross clear distance between the buried pipeline and the pipeline such as the foundation of buildings and structures meet the specification requirements;

F does the design leave necessary space for the installation, operation and maintenance of equipment, pipelines and fittings? Whether installation and maintenance holes are reserved in the civil structure of large equipment and pipelines, whether necessary maintenance and hoisting facilities are considered, and whether the positions of reserved holes in the structural drawing are consistent with the process drawing;

G. Whether reliable waterproof measures and technical measures have been taken for the pipeline crossing the walls and floors of basement, water pool and other structures, and crossing expansion joints and settlement joints;

H. Whether effective protective measures have been taken for the design of equipment and pipelines that may harm human body;

1. Will the equipment cause excessive noise to the surrounding environment during operation? If yes, whether the design has adopted corresponding noise reduction and shock absorption measures;

J whether the material and test pressure of the pipeline meet the requirements of design and construction acceptance specifications.

5) Electrical

A. Check whether the drawings are complete, which shall generally include the following contents:

I. General plan of power supply, including substation location and line direction, etc.

Ⅱ. High and low voltage power supply system diagram, including single line diagram, indicating leakage protection, measuring instrument and voltage level. System columns should be: switch cabinet number, switch cabinet model, line number, equipment capacity, calculated current, user name, etc. From top to bottom, the equipment of high-quality system and low-quality system should have an order list and order diagram;

Three, distribution station plan, all kinds of current cabinet and control cabinet section and installation plan;

Ⅳ Power plan and power system plan, including distribution box, control cabinet, starter, line and grounding plan, etc.

ⅴ Lighting average diagram and lighting system diagram;

ⅵ lightning protection of buildings and arrangement of grounding electrodes and grounding wires;

ⅶ Individual automatic control equipment must have distribution system diagram, schematic diagram and block diagram;

Eight, the selection of standard drawings or reuse drawings should have a detailed list of contents and design instructions.

B. Check with the civil engineering drawings whether the plane layout, elevation and embedded parts of the substation are correct, whether the plane size and space height of the substation meet the specification requirements, whether there is appropriate space for operation, installation and maintenance, and whether the consideration of waterproofing, fire prevention and explosion prevention is thoughtful;

C. check whether the equipment and materials selected in the design are reasonable. If new equipment and materials are selected, there should be sufficient safety and reliability basis; For different environmental conditions of electricity consumption, the fire and explosion-proof grade of the site should be defined, and the selected equipment and materials should be suitable for it;

D. Check whether there is any contradiction between power supply location, line direction, intersection and other professions or places that affect safety;

E cable laying elevation, and special protection facilities shall be provided when crossing roads or other obstacles;

F check whether the specifications, models and quantities of the equipment and materials list are inconsistent with the drawings.

Significance of joint review of drawings

Through the blue prints.the design, familiar with the design drawings, understand the design intent, grasp the characteristics and difficulties of the project, find out the technical problems that need to be solved and draw up solutions, and eliminate the problems caused by design defects before construction. Therefore, the blue prints.the design of construction drawings is an indispensable and important work before construction. The depth and comprehensiveness of the joint review of drawings will affect the quality, progress, cost, safety and difficulty of engineering construction to a certain extent. As long as this work is done carefully, the problems existing in the drawings can generally be found and dealt with as soon as possible when examining the drawings, thus improving the construction quality, saving the construction cost, shortening the construction period and improving the efficiency.

Content of blue prints.the design

(1) Design documents must be prepared by qualified design units. When the blue prints.the design, the first thing to see is whether there is unlicensed design or leapfrog design; Whether the drawings have been formally signed by the design unit.

(2) Whether the geological exploration data are complete.

(3) In recent years, due to many design tasks, some design units have not made a detailed investigation, but extracted and copied old data for explanation, and some even directly called old drawings, etc., and directly determined the location behind closed doors in the office, which is far from the actual terrain. Therefore, when the blue prints.the design, it is necessary to check whether the design drawings and descriptions meet the local requirements.

(4) Whether the designed seismic intensity meets the local requirements.

(5) Whether the construction unit has various standard atlas listed in the construction drawing.

(6) Whether the source of materials is guaranteed and can be replaced; Whether the requirements in the drawing can be met; Whether there are problems in the application of new materials and technologies.

(7) Is the construction safety and environmental sanitation guaranteed?