Optimal design is the key to control project cost?

due to the lack of optimal design of many building products, the function settings are unreasonable, which affects the normal use; Some design drawings are of poor quality, and the professional designs are contradictory, resulting in the phenomenon of construction rework and shutdown, while others cause quality defects and potential safety hazards, which bring great losses to the country and people and great waste of investment. The application of optimal design in civil air defense engineering can improve the structural performance, increase the use space, reduce the project cost, and also save energy and reduce resource consumption.

1. The optimization of scheme design is an important step in the design stage and an effective method to control the project cost. In the scheme design stage, the following factors should be paid attention to: First, the plane layout of the project should be adapted to local conditions and save resources. The relationship between the division of fire prevention and smoke prevention zones and protection units in air defense basement should be comprehensively considered and reasonably arranged. Second, the selection of engineering structure form and column network should be economical and reasonable, and the story height should be reduced as much as possible to reduce the embedded depth of the project under the condition of meeting the functional requirements. Third, civil air defense protection equipment should be equipped with advanced technology, which can be quickly installed and dismantled. Fourth, domestic equipment with durability, high efficiency and low energy consumption should be selected as far as possible for the installation equipment of civil air defense projects. Fifth, the rational selection of advanced building materials and the use of advanced technology. These factors will directly affect the investment of the project. We can obtain satisfactory design products, improve the design quality and reduce the project cost through scheme optimization.

2. Give full play to the role of design bidding. The bidding system is also implemented in China's engineering design, with open and fair competition. The purpose is to select excellent design schemes through bidding, adopt advanced technology, reduce the project cost, shorten the construction period, improve the investment benefit, and take effective control of the project cost in the design stage as one of the main criteria for selecting the winning bidder, and control and manage the whole process cost.

3. Strengthen the design management of civil air defense projects. Firstly, the civil air defense design department should further standardize the design of civil air defense projects and improve the quality and depth of drawing design. Secondly, it is necessary to establish a relatively perfect system of joint review of drawings, strictly do a good job in reviewing design drawings, and control the amount of engineering design changes. Especially for the basement built in combination with civil buildings, the owner usually entrusts the design of the basement to the professional design unit of civil air defense. At this time, it is necessary for the two design units to make technical connection in time, carefully analyze the feasibility of the conversion scheme of peacetime and wartime functions, ensure that the civil air defense project has a perfect combination function of peacetime and wartime, reduce design errors, avoid mistakes, omissions and deficiencies caused by design drawings, so as to avoid unnecessary engineering rework and increase investment, and also lay a good foundation for further implementing the bidding method of bill of quantities valuation.

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