1. Calculate the amount of work
According to the approved list of total construction projects, respectively, calculate the amount of work of each project. As the construction of the total progress plan mainly plays a controlling role, so the project division should not be too detailed, can be arranged according to determine the procedure for carrying out the project, should highlight the main project, some ancillary, auxiliary works and minor works, temporary building works can be merged.
The purpose of calculating the amount of each project is to correctly select the construction program and the main construction, transportation and installation of machinery; preliminary planning of the main works of the construction of the flow, the calculation of the amount of resources needed. Therefore, the calculation of the amount of work is only a rough calculation, according to the preliminary (or expand the preliminary) design drawings and according to a variety of quota manual for calculation. Commonly used quotas, information are as follows:
(1) the proposed budget indicators and expand the structure of the quota. These two quotas were classified according to the type of structure of the building, span, number of floors, height, etc., to give every 100m?building volume and every 100 square meters of floor area of the labor force and the main material consumption indicators.
(2) ten thousand yuan, one hundred thousand yuan investment volume, labor and material consumption expansion index. This quota provides for a certain structure type of building, per ten thousand or one hundred thousand yuan of investment in the amount of labor, major materials and other consumption. According to the design drawings of the structure type, you can find the proposed project requires the labor force and the number of major materials consumed in each subsection.
(3) standard design or the information of the same type of buildings and structures already built. In the absence of the above types of rate manuals, the standard design or the actual consumption of labor and materials of similar projects already built, to be analogous, proportional estimation. However, since it is extremely rare to find constructed projects that are exactly the same as the proposed project, it is generally necessary to make conversion adjustments when using information on constructed projects. This kind of consumption index are the experience data accumulated by each unit for many years, often in practice. Calculated using this method.
In addition to housing, but also must calculate the volume of other site-wide works, such as site formation, railroads, roads and various pipeline lengths, etc., which can be calculated according to the general layout of the building.
Fill in the quantities calculated in the quantities summary table below.
2. Determine the construction period of each building or structure
The construction period of the building or structure should be based on the construction unit's construction technology, management level, the construction of the project's structural features, building area or volume size, on-site construction conditions, funds and materials supply and other circumstances. When determining, should also refer to the duration quota. Duration quota is based on our construction experience in various sectors over the years, on the basis of investigation and statistics, after analyzing and comparing the development.
3. Determine the opening and completion of each building or structure and the relationship between each other
In the construction deployment has been determined in the total construction period, the total development of the program, and then through the above face of the building or structure construction period (i.e., construction period) to analyze and determine the building or structure can be further arranged for each building or structure opening and completion of each other and the relationship between each other and the time of the lap. In arranging the construction time and start and completion time of each project, the following factors should be taken into account:
1) the same time should not be too many projects, to avoid the dispersion of manpower and material resources.
2) to auxiliary - main - auxiliary arrangements, auxiliary works (power systems, water supply and drainage systems, transportation systems and residential complexes, garages, etc.) should be constructed first part of the construction, so that can be used for the main production plant and can be used for construction services in order to save temporary facilities. For construction services to save the cost of temporary facilities.
3) Arrangement of construction progress, should try to make the various types of construction personnel, construction machinery in the whole site of continuous construction, as far as possible, the organization of water construction, so as to achieve a comprehensive balance of firepower, materials and construction machinery.
4) To consider the seasonal impact, in order to reduce the cost of construction measures. General large-scale earthwork and deep foundation construction should be avoided in the rainy season, large quantities of cast-in-place concrete works should be avoided in the winter, and cold regions should try to do a good job of enclosure before winter, so as to arrange for indoor work or equipment installation works in winter, etc..
5) Determine some ancillary works or sporadic projects as backup projects (such as dormitories, stores, ancillary or auxiliary workshops, temporary facilities, etc.), as a regulating project, interspersed with the main project of the flow of construction, so as to make the construction of continuous and balanced.
6) The impact of spatial arrangement of the construction site should be considered.
4. Preparation of construction master schedule
Construction master schedule can be expressed in crosswalk diagrams or network diagrams. As the construction of the total progress plan is only a controlling role, so do not have to get too detailed, if the plan is too detailed, due to the implementation of the complexity of the situation in the process of change, adjusting the plan is inconvenient. When the total progress plan expressed in a crosswalk diagram, the project can be arranged according to the construction of the overall program to carry out the project procedures. Cross-channel diagram should be expressed on the construction project start and completion time and its construction duration. The following table shows the form of the construction master schedule.
5. Check and adjustment optimization of the construction schedule
Construction schedule should be checked after drawing, check should be carried out from the following aspects:
1) Whether to meet the project master schedule or construction contract on the total construction period and the requirements of the start and end of the time;
2) Whether the overlap between the construction project is reasonable
3) whether the dynamic curve of resource requirement of the whole construction project is balanced;
4) whether there is a balance between the main project and the auxiliary and supporting projects.
The above problems should be solved by adjusting and optimizing.
The adjustment and optimization of the total construction progress plan is to change the duration of a number of projects, advance or postpone the start and completion date of certain projects, that is, through the duration optimization, the duration of a cost optimization and resource optimization mode to achieve.