Construction organization design is a comprehensive technical and economic document to guide engineering construction, the main content is the technical scheme and technical requirements of engineering construction。

As an important part of the bidding document, the quality of the construction organization design scheme directly affects whether the enterprise can win the bid。In addition, it is also an important basis for engineering settlement and engineering claims, and is the basis for the supervisor to supervise the project。

一、Construction organization design

At present, according to the requirements of the management mode of the construction industry, the construction organization design is mainly divided2大类：

1. Guiding construction organization design

It includes the overall design of construction organization and the design of construction organization in the bidding stage。

The guiding construction organization design is faced with the large capacity or uncertain factors in the single project, group project or bidding project。Only to determine the general principle, does not have the engineering construction guidance。

2. Implementation construction organization design

Including unit project construction organization design, project construction organization design。

Implementation construction organization design, according to the characteristics of the project or as a complement to the general principles of the construction organization design has been determined, its content is detailed, perfect, strong pertinence, is the basis of engineering construction。

二、How to prepare？

1. Preparation method

The preparation of the construction organization design should not only consider the technical needs, but also consider the needs of the performance of the contract, and should be compiled into a project management planning document that integrates technology, economy, management and contract, a guiding document for the performance of the contract, a document based on the project settlement and claims。

For large or complex projects, it should be prepared in stages or divisions (divisions, sub-items);The preparation work should be completed before the implementation of the targeted project。

The construction organization design (scheme) of subcontracted sub-projects shall be summarized in the construction organization design of the project in the form of attachments。

2. Main content

1) Project overview and characteristics

2) Construction conditions

3) Conditions to be provided by the owner

Including: construction drawing, construction site, water and electricity supply, materials and equipment provided by the owner, the owner should go through the approval procedures。

Best list description, providing the time, place, quantity and quality of construction conditions。

4) Project subcontracting

For the subcontracted project, the owner shall specify the entry and exit time, delivery and acceptance time, project handover methods and procedures, etc。

5) Construction management objectives

Duration objectives, quality objectives, as well as new technology application, civilized construction, green construction, safe production and cost objectives。

6) Project organization

Determine the construction management organization, including the project manager, technical leader and other management personnel, and clarify the functions of the organization and the responsibilities of the main personnel。

7) Construction deployment and construction scheme

Including the construction schedule, measures to ensure the construction period, and construction preparation (including technical preparation, site preparation, main construction equipment preparation)。

8) Construction method of sub-projects:

Construction survey (monitoring equipment and methods), foundation and foundation works (including earthworks), shelf works, main works(reinforcement, formwork, concrete, masonry), roofing, floor engineering, door and window engineering, decoration engineering, installation engineering (water, heating, electrical, ventilation, etc.)。

9) Construction layout plan

① Location of living construction facilities

② Site construction road location

③ Location of water and electricity network and power facilities for production and living on site

④ Bulk materials and tempered turnover materials stacking site

⑤ Stacking site for equipment, finished products, semi-finished products and parts

⑥ Mixing station and processing plant location

⑦ Geographical direction sign。

三、Three types of design scheme

1. Overall design of construction organization

The overall design of construction organization is a macroscopic comprehensive document of technology and economy。

a Focus on the content of the statement

The main contents of the overall design of construction organization:

1) Engineering overview of the construction project

2) Construction deployment and construction scheme of core projects

3) Full-field construction preparation work plan

4) Construction schedule

5) Various resource demand plans

6) Main technical and economic indicators, including project construction period, labor productivity, project construction quality, project construction cost, project construction safety, mechanization degree, prefabrication degree, temporary engineering, etc。

The purpose of compiling the general design of the construction organization is: through the scheme, the owner can have a clear understanding of the general situation of the project and each unit of the project, so as to judge whether the construction method expressed in the paper has advanced nature and adaptability。

因此，Project overview(Engineering characteristics)It should be explained as the main content。

b Programming

1) Collect and be familiar with the relevant materials and drawings required for the preparation of the general design of the construction organization, and conduct investigation and research on the characteristics and construction conditions of the project;

2) Calculate the quantity of major work projects;

3) Determine the overall deployment of construction;

4) Drawing up the construction plan;

5) Prepare the overall construction schedule;

6) Prepare resource demand plan;

7) Prepare the construction preparation work plan;

8) Construction general plan design;

9) Calculate the main technical and economic indicators。

2. Bidding stage construction organization design

The construction organization design of bidding stage has certain particularity。In addition to complying with the specifications and technical requirements, as an important part of the tender documents, there are the following points to note。

a Check the tenderer's pulse

It is necessary to make the tenderer think that the bidder has a full understanding and preparation for the project。Therefore, it should focus on the expression of the project to the tenderer (builder) may bring reputation, benefits, and the value of the project itself。

b Scheme Selection

The scheme selection is mainly the scheme selection of the main project and special installation project。

For the main project, there may be a variety of options available。Different regions have different recognition of a certain construction technology;The use effect of the same technology in the surrounding engineering has an intangible influence on the shortcomings of the scheme。

Therefore, it is necessary to understand the plan that the bidder is willing to accept。

c The construction deployment should be detailed

The construction deployment includes plane layout, transportation scheme, construction production, and personnel arrangement。

Among them, the arrangement of construction personnel is the main content。The construction experience and representative performance of the proposed personnel should be explained in detail。

d Prepare the construction schedule

According to previous project bidding experience, onlyAbout 20 minutes to read the construction organization。Time is limited, so it is necessary to make the necessary explanation of the construction schedule:

1) Specify the total construction period, the foundation construction period, the main construction period, as well as the painting period, the installation period, the cross-construction period。

Total duration= (Foundation + main body + painting + installation) Period - cross period

2) Explain the special measures to be taken to complete the construction period。

e Precautions

The bidding construction organization design mainly plays a demonstration role, rather than for practical operation。The content is too detailed, but there is a false leisure;Too much content and too much space will give the evaluator a lengthy feeling, which is not conducive to winning the bid。Therefore, the bidding construction organization design should be simple rather than complicated。

3. Implementation engineering construction organization design

Including unit project construction organization design and sub-project construction organization design。

a important basis for project settlement and claim

Its role is not just to guide construction:

1) It is the basis of project settlement

The project bidding price is often quoted by the unit price, and the application of the unit price and the calculation of the actual amount of work are determined according to the approved construction organization design, so the construction organization design is the basis of the project settlement。

2) It is the basis for engineering claims

If the construction period is delayed due to the reasons of the owner, the construction enterprise may file a claim for the construction period;Economic claims may be filed for any economic losses caused by materials and materials。The basis of the claim includes the construction organization design。

3) It is the basis for the supervisor to supervise the project

Construction organization design, applied to the whole process of construction, integrates technology, economy, management and contract as one, is a comprehensive construction plan and contract document, so supervision engineers regard it as an important basis for supervision。

According to the construction organization design, the supervisor shall strictly supervise the implementation, strictly control the contractor's changes and modifications to the construction organization, and regard unauthorized changes and modifications as breach of contract。

b Do not copy the rules and regulations

The implementation construction organization design has strong pertinence and independence, and the content of preparation should be comprehensive and thorough。

The problems that should be paid attention to during construction, especially those that may cause other construction problems, should be indicated。The specific operation method is not clear in the design scheme, but detailed in the technical disclosure。

c Construction progress chart should be detailed

The construction progress chart does not only reflect the progress requirements of the project。It can also indirectly reflect the quality of construction personnel, the advancement of technology, the seasonal impact, the level of equipment and equipment, and the preparation of materials。

Therefore, it is necessary to optimize the progress chart to ensure that it is feasible。

d highlight the construction operation design

The construction operation design mainly focuses on the construction of the main project, the construction of special component nodes, the advanced surface splicing method, the hoisting of special components, etc。

The design level of construction work directly affects the project progress, project quality, construction safety, economic benefits, etc., so it is necessary to highlight the design of drawings。It is necessary to assume unfavorable factors, propose different solutions, and finally make reasonable optimization。

Attention should be paid to the problem

1. It must be reviewed and signed by the supervision engineer

The construction organization design must be signed and confirmed by the chief supervision engineer (the owner's representative) before it can be used as the basis for construction, settlement and claim。

2. The construction organization design shall not be modified at will after the contract is signed

Once the construction organization design is determined, it should be treated as a contract。To organize construction according to the construction organization design is to fulfill the project contract。

If it is really necessary to make major modifications to the construction organization design (especially the construction scheme), the supervision engineer shall be explained in writing the necessity, rationality and content of the modifications, and the implementation shall be approved。

3. Make implementation and change records, and make reasonable claims

Write the construction log, record the important matters, register the notice of the supervision engineer, record the on-site instructions and oral instructions of the supervision engineer in a timely manner, and ask the supervision engineer to sign and confirm in a timely manner, so as to serve as the basis for changing the construction organization design and the evidence of project settlement, claims and arbitration。

The claims that can be made by the construction unit include:

1) The owner fails to deliver the construction drawing or other technical data on time, resulting in the delay of the construction;

2) Due to incomplete or incorrect information provided by the owner, the construction scheme, construction schedule or rework are changed during the construction process;

3) The owner fails to provide the construction site, road or water and electricity as agreed, so that the project cannot start on schedule or cannot be carried out normally

4) The owner or supervision engineer issues instructions to change the construction plan, construction sequence and construction site layout

5) The owner or the supervising engineer requests to speed up or slow down the construction progress or suspend the construction

6) The owner or supervision engineer fails to carry out the inspection and acceptance of the project on time。

Claims shall be made in a timely manner, and a statement of the amount claimed and the corresponding evidence shall be submitted at the same time as the claim application。