The compilation method of design drawings of highway construction projects in China is different from that of housing construction projects (the state has implemented the valuation mode of bill of quantities of construction projects). As the basic data for compiling project cost, engineering quantity is usually calculated by designers while completing design drawings. Before compiling the project cost, the cost engineer should be familiar with the design drawings and check the engineering quantity. Therefore, the key of construction valuation is how to extract the engineering quantity from the design drawings.

In the budget work, the valuation of bridge engineering is more complicated, accounting for the largest proportion in the cost document. In addition, the continuous development of bridge design and construction technology in recent years and the wide application of new structures, new materials and new technologies have increased the difficulty of project cost valuation.

II. Information to be reviewed:

(1) major projects

Including bridge dyeing foundation, lower and upper works. The general design drawings have been given, and it is relatively easy to determine the various quantities of valuation according to the quota requirements.

(2) Auxiliary engineering

They only contributed to the formation of the main project, the measures that must be taken to complete the main project, and some facilities to be demolished after completion. This situation is complicated, such as foundation excavation, cofferdam, drainage, working platform, casing, mud boat and its circulation system. ; It belongs to the upper and lower engineering, including arch cap, bracket, lifting equipment, lifting formwork, construction elevator, etc. It is not only related to the foundation, but also related to the superstructure, such as concrete component transportation, prefabrication yard and its facilities (such as large prefabricated component foundation, tensioning pedestal, gantry, etc.). ), mixing station (ship) and steam curing facilities. In addition to foundation excavation, the valuation quantities of these auxiliary projects should be determined according to the actual situation of construction projects and the requirements of construction organization design, and with reference to previous successful experiences. It is not reflected in the design drawings, and has strong plasticity, which has an extremely important impact on the project cost. Therefore, it is of great practical significance to correctly determine the valuation quantities of various projects.