Design is an important part of engineering construction, which is the stage of balancing the proposed project in technology and economy. Design is also a stage that has a great impact on the construction price, and it is particularly important to control the construction price. First of all, we should do a good job of the old bridge load, old pavement test, old structure flaw detection and other preliminary work. Then choose reasonable treatment measures, analyze the advantages and disadvantages of various schemes, use the scheme of combining technology and economy to demonstrate the design scheme again, and finally determine the scheme cost, and reasonably control the cost.<br>
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