How to divide the construction sub project more clearly?

It is divided into major items such as foundation, main body, waterproofing, electrical, heating, water supply and drainage, and decoration, and then divided into sub-items in each division.

The relationship between the size in the same project (from large to small): single project, unit project, sub-project, sub-project. A single project refers to a project that has independent design documents and can independently exert production capacity or benefits after completion.

It is also called an engineering project. Such as production workshops, office buildings, and residences in factories; Teaching buildings, canteens, dormitories, etc., in schools, which are part of the infrastructure project.

Unit engineering: For example, the single project of the production workshop is composed of unit projects such as plant construction engineering and mechanical equipment installation engineering. Construction projects can also be subdivided into general civil engineering, plumbing and sanitation engineering, electrical lighting engineering and industrial pipeline engineering and other unit projects.

The difference between the above two is mainly to see whether it can independently exert its overall benefits or production capacity after completion.

It is defined as the planning, survey, design and construction, completion and other technical work carried out by the new construction, reconstruction or expansion of buildings and ancillary structures and facilities, as well as the completion of engineering entities and the installation of supporting lines, pipelines and equipment. It also refers to the construction of various houses and buildings, also known as construction workload. This part of the investment must be carried out through construction activities.

1. Whether it has independent construction conditions and whether it can produce benefits.

The sub-project does not have the conditions for independent construction, and the sub-project cannot exert its ability or benefit independently. The unit project has independent construction conditions, but the unit project cannot independently exert its ability or benefits. Sub-projects can be completed independently, and sub-projects can exert their capabilities or benefits independently.

2. Differences in composition.

A sub-project is an integral part of a sub-project, and a sub-project consists of multiple sub-projects. A sub-project is a component of a unit project, and a unit project can be divided into several sub-projects. A unit project is an integral part of a single project, and a single project is generally composed of several unit projects.

Construction works are divided into levels:

Project Engineering. Unit projects (sub-unit projects).

Divisional (subdivision) engineering.

Sub-engineering operations.

Divisional works are the various components of construction works and installation works, which are divided according to the main parts or types of work of construction works and installation works.

Such as earthwork, foundation and foundation engineering, masonry engineering, ground engineering, decoration engineering, pipeline engineering, ventilation engineering, general equipment installation engineering, container engineering, automation instrument installation engineering, industrial furnace masonry engineering, etc.

Sub-project: Sub-project refers to the component of the sub-project, which is the most basic unit of calculation in the construction drawing budget. It is further divided into sub-projects according to different construction methods and different specifications of different materials.

For example, the reinforced concrete sub-project can be divided into two sub-projects: pounding and prefabrication; Prefabricated floor slab works can be divided into sub-projects such as slabs, hollow slabs, and grooved slabs; The brick wall division project can be divided into sleeping wall, hollow wall, interior wall, exterior wall, one brick thick wall, one and a half brick thick wall and other sub-projects.

Conditions for the acceptance of sub-projects:

1. The scope of sub-projects: such as reinforcement engineering, formwork engineering, concrete engineering, etc.;

2. Acceptance conditions for reinforcement projects. Check the longitudinal stressed steel bar according to the construction drawing, and check the variety, diameter, quantity, position, spacing and shape of the steel bar. Check the thickness of the concrete protective layer and whether the structural reinforcement meets the requirements.

Check the reinforcement joints, such as lashing laps, check the lap length, joint position and quantity; If welded joints or mechanical connections, the appearance quality should be checked, whether the mechanical properties of the sampled specimen meet the requirements, and the position of the joint;

3. Acceptance conditions of formwork engineering: each layer should be reviewed, the key axis and axis elevation should be checked once, and the size of reserved holes, holes, and embedded components should be checked to meet the requirements. Check whether the formwork has sufficient strength, stiffness and stability.

Check whether the size deviation of the template is within the allowable range of the regulations;

4. Conditions for acceptance of concrete engineering: before pouring concrete, the cement factory certificate, technical description, and test report submitted for inspection according to the regulations should be checked. Check the quality of the sand and gravel.

Whether the concealed acceptance of the reinforcement is qualified. Check whether water, electricity, materials, machinery and equipment, workers and construction technicians are all in place.

Legal basis] Construction Law of the People's Republic of China

Article 20 If the construction project is subject to public bidding, the contracting unit shall, in accordance with the legal procedures and methods, issue a tender announcement and provide the bidding documents containing the main technical requirements of the bidding project, the main contract terms, the standards and methods of bid evaluation, as well as the procedures for bid opening, evaluation and awarding.

The construction project is divided into: foundation and foundation, main structure, building decoration, building roofing, building water supply, drainage and heating, building electrical, intelligent building, ventilation and air conditioning, elevator, building energy conservation division, a total of 10 sub-projects.

Each sub-project is further divided into a number of sub-projects, and each sub-division project is further divided into a number of sub-projects.

Segment works are classified according to the main parts or types of work of construction works and types of installation works. Such as earthwork, foundation and foundation engineering, masonry engineering, ground engineering, decoration engineering, pipeline engineering, ventilation engineering, section leakage general equipment installation engineering, container engineering, automation instrument installation engineering, industrial furnace masonry engineering, etc.

The sub-project is further divided according to different construction methods, different specifications of different materials, etc. For example, the reinforced concrete sub-project can be divided into two sub-projects: pounding and prefabrication; Prefabricated floor slab works can be divided into sub-projects such as slabs, hollow slabs, and grooved slabs; The brick wall division project can be divided into solid wall, hollow wall, interior wall, exterior wall, one brick thick wall, one and a half brick thick wall and other sub-projects.

What are the sub-projects in the construction of the building: the reinforced concrete sub-project can be divided into two sub-projects: pounding and prefabrication; Prefabricated floor slab engineering can be divided into slab, hollow slab, trough slab and other sub-projects; The brick wall division project can be divided into sleeping wall (solid wall), hollow wall, interior wall, external wall, one brick thick wall and one and a half thick brick wall and other sub-projects.

The Construction Engineering segment includes: Foundation and Foundation (9 sub-divisions), Main Structure (6 sub-divisions), Building Decoration (10 sub-divisions), Building Roofing (5 sub-divisions), Building Water Supply and Drainage and Heating (10 sub-divisions), Building Electrical (7 sub-divisions), Intelligent Building (10 sub-divisions of Qiaozhen Bureau), Ventilation and Air Conditioning (7 sub-divisions), Elevators (3 sub-divisions), and Building Energy Conservation Engineering.

Construction engineering refers to the engineering entity formed through the construction of various types of housing buildings and their ancillary facilities and the installation of supporting lines, pipelines and equipment. Among them, "housing construction" refers to projects with roofs, beams and columns, walls, foundations and internal spaces that can form internal spaces to meet the needs of people's production, residence, study, and public travel.